/*!

* FullCalendar v3.5.1
* Docs & License: https://fullcalendar.io/
* (c) 2017 Adam Shaw
*/

(function(factory) {

if (typeof define === 'function' && define.amd) {
        define([ 'jquery', 'moment' ], factory);
}
else if (typeof exports === 'object') { // Node/CommonJS
        module.exports = factory(require('jquery'), require('moment'));
}
else {
        factory(jQuery, moment);
}

})(function($, moment) {

;;

var FC = $.fullCalendar = {

version: "3.5.1",
// When introducing internal API incompatibilities (where fullcalendar plugins would break),
// the minor version of the calendar should be upped (ex: 2.7.2 -> 2.8.0)
// and the below integer should be incremented.
internalApiVersion: 10

}; var fcViews = FC.views = {};

$.fn.fullCalendar = function(options) {

var args = Array.prototype.slice.call(arguments, 1); // for a possible method call
var res = this; // what this function will return (this jQuery object by default)

this.each(function(i, _element) { // loop each DOM element involved
        var element = $(_element);
        var calendar = element.data('fullCalendar'); // get the existing calendar object (if any)
        var singleRes; // the returned value of this single method call

        // a method call
        if (typeof options === 'string') {

                if (options === 'getCalendar') {
                        if (!i) { // first element only
                                res = calendar;
                        }
                }
                else if (options === 'destroy') { // don't warn if no calendar object
                        if (calendar) {
                                calendar.destroy();
                                element.removeData('fullCalendar');
                        }
                }
                else if (!calendar) {
                        FC.warn("Attempting to call a FullCalendar method on an element with no calendar.");
                }
                else if ($.isFunction(calendar[options])) {
                        singleRes = calendar[options].apply(calendar, args);

                        if (!i) {
                                res = singleRes; // record the first method call result
                        }
                        if (options === 'destroy') { // for the destroy method, must remove Calendar object data
                                element.removeData('fullCalendar');
                        }
                }
                else {
                        FC.warn("'" + options + "' is an unknown FullCalendar method.");
                }
        }
        // a new calendar initialization
        else if (!calendar) { // don't initialize twice
                calendar = new Calendar(element, options);
                element.data('fullCalendar', calendar);
                calendar.render();
        }
});

return res;

};

var complexOptions = [ // names of options that are objects whose properties should be combined

'header',
'footer',
'buttonText',
'buttonIcons',
'themeButtonIcons'

];

// Merges an array of option objects into a single object function mergeOptions(optionObjs) {

return mergeProps(optionObjs, complexOptions);

}

;;

// exports FC.applyAll = applyAll; FC.debounce = debounce; FC.isInt = isInt; FC.htmlEscape = htmlEscape; FC.cssToStr = cssToStr; FC.proxy = proxy; FC.capitaliseFirstLetter = capitaliseFirstLetter;

/* FullCalendar-specific DOM Utilities ———————————————————————————————————————-*/

// Given the scrollbar widths of some other container, create borders/margins on rowEls in order to match the left // and right space that was offset by the scrollbars. A 1-pixel border first, then margin beyond that. function compensateScroll(rowEls, scrollbarWidths) {

if (scrollbarWidths.left) {
        rowEls.css({
                'border-left-width': 1,
                'margin-left': scrollbarWidths.left - 1
        });
}
if (scrollbarWidths.right) {
        rowEls.css({
                'border-right-width': 1,
                'margin-right': scrollbarWidths.right - 1
        });
}

}

// Undoes compensateScroll and restores all borders/margins function uncompensateScroll(rowEls) {

rowEls.css({
        'margin-left': '',
        'margin-right': '',
        'border-left-width': '',
        'border-right-width': ''
});

}

// Make the mouse cursor express that an event is not allowed in the current area function disableCursor() {

$('body').addClass('fc-not-allowed');

}

// Returns the mouse cursor to its original look function enableCursor() {

$('body').removeClass('fc-not-allowed');

}

// Given a total available height to fill, have `els` (essentially child rows) expand to accomodate. // By default, all elements that are shorter than the recommended height are expanded uniformly, not considering // any other els that are already too tall. if `shouldRedistribute` is on, it considers these tall rows and // reduces the available height. function distributeHeight(els, availableHeight, shouldRedistribute) {

// *FLOORING NOTE*: we floor in certain places because zoom can give inaccurate floating-point dimensions,
// and it is better to be shorter than taller, to avoid creating unnecessary scrollbars.

var minOffset1 = Math.floor(availableHeight / els.length); // for non-last element
var minOffset2 = Math.floor(availableHeight - minOffset1 * (els.length - 1)); // for last element *FLOORING NOTE*
var flexEls = []; // elements that are allowed to expand. array of DOM nodes
var flexOffsets = []; // amount of vertical space it takes up
var flexHeights = []; // actual css height
var usedHeight = 0;

undistributeHeight(els); // give all elements their natural height

// find elements that are below the recommended height (expandable).
// important to query for heights in a single first pass (to avoid reflow oscillation).
els.each(function(i, el) {
        var minOffset = i === els.length - 1 ? minOffset2 : minOffset1;
        var naturalOffset = $(el).outerHeight(true);

        if (naturalOffset < minOffset) {
                flexEls.push(el);
                flexOffsets.push(naturalOffset);
                flexHeights.push($(el).height());
        }
        else {
                // this element stretches past recommended height (non-expandable). mark the space as occupied.
                usedHeight += naturalOffset;
        }
});

// readjust the recommended height to only consider the height available to non-maxed-out rows.
if (shouldRedistribute) {
        availableHeight -= usedHeight;
        minOffset1 = Math.floor(availableHeight / flexEls.length);
        minOffset2 = Math.floor(availableHeight - minOffset1 * (flexEls.length - 1)); // *FLOORING NOTE*
}

// assign heights to all expandable elements
$(flexEls).each(function(i, el) {
        var minOffset = i === flexEls.length - 1 ? minOffset2 : minOffset1;
        var naturalOffset = flexOffsets[i];
        var naturalHeight = flexHeights[i];
        var newHeight = minOffset - (naturalOffset - naturalHeight); // subtract the margin/padding

        if (naturalOffset < minOffset) { // we check this again because redistribution might have changed things
                $(el).height(newHeight);
        }
});

}

// Undoes distrubuteHeight, restoring all els to their natural height function undistributeHeight(els) {

els.height('');

}

// Given `els`, a jQuery set of <td> cells, find the cell with the largest natural width and set the widths of all the // cells to be that width. // PREREQUISITE: if you want a cell to take up width, it needs to have a single inner element w/ display:inline function matchCellWidths(els) {

var maxInnerWidth = 0;

els.find('> *').each(function(i, innerEl) {
        var innerWidth = $(innerEl).outerWidth();
        if (innerWidth > maxInnerWidth) {
                maxInnerWidth = innerWidth;
        }
});

maxInnerWidth++; // sometimes not accurate of width the text needs to stay on one line. insurance

els.width(maxInnerWidth);

return maxInnerWidth;

}

// Given one element that resides inside another, // Subtracts the height of the inner element from the outer element. function subtractInnerElHeight(outerEl, innerEl) {

var both = outerEl.add(innerEl);
var diff;

// effin' IE8/9/10/11 sometimes returns 0 for dimensions. this weird hack was the only thing that worked
both.css({
        position: 'relative', // cause a reflow, which will force fresh dimension recalculation
        left: -1 // ensure reflow in case the el was already relative. negative is less likely to cause new scroll
});
diff = outerEl.outerHeight() - innerEl.outerHeight(); // grab the dimensions
both.css({ position: '', left: '' }); // undo hack

return diff;

}

/* Element Geom Utilities ———————————————————————————————————————-*/

FC.getOuterRect = getOuterRect; FC.getClientRect = getClientRect; FC.getContentRect = getContentRect; FC.getScrollbarWidths = getScrollbarWidths;

// borrowed from github.com/jquery/jquery-ui/blob/1.11.0/ui/core.js#L51 function getScrollParent(el) {

var position = el.css('position'),
        scrollParent = el.parents().filter(function() {
                var parent = $(this);
                return (/(auto|scroll)/).test(
                        parent.css('overflow') + parent.css('overflow-y') + parent.css('overflow-x')
                );
        }).eq(0);

return position === 'fixed' || !scrollParent.length ? $(el[0].ownerDocument || document) : scrollParent;

}

// Queries the outer bounding area of a jQuery element. // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive). // Origin is optional. function getOuterRect(el, origin) {

var offset = el.offset();
var left = offset.left - (origin ? origin.left : 0);
var top = offset.top - (origin ? origin.top : 0);

return {
        left: left,
        right: left + el.outerWidth(),
        top: top,
        bottom: top + el.outerHeight()
};

}

// Queries the area within the margin/border/scrollbars of a jQuery element. Does not go within the padding. // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive). // Origin is optional. // WARNING: given element can't have borders // NOTE: should use clientLeft/clientTop, but very unreliable cross-browser. function getClientRect(el, origin) {

var offset = el.offset();
var scrollbarWidths = getScrollbarWidths(el);
var left = offset.left + getCssFloat(el, 'border-left-width') + scrollbarWidths.left - (origin ? origin.left : 0);
var top = offset.top + getCssFloat(el, 'border-top-width') + scrollbarWidths.top - (origin ? origin.top : 0);

return {
        left: left,
        right: left + el[0].clientWidth, // clientWidth includes padding but NOT scrollbars
        top: top,
        bottom: top + el[0].clientHeight // clientHeight includes padding but NOT scrollbars
};

}

// Queries the area within the margin/border/padding of a jQuery element. Assumed not to have scrollbars. // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive). // Origin is optional. function getContentRect(el, origin) {

var offset = el.offset(); // just outside of border, margin not included
var left = offset.left + getCssFloat(el, 'border-left-width') + getCssFloat(el, 'padding-left') -
        (origin ? origin.left : 0);
var top = offset.top + getCssFloat(el, 'border-top-width') + getCssFloat(el, 'padding-top') -
        (origin ? origin.top : 0);

return {
        left: left,
        right: left + el.width(),
        top: top,
        bottom: top + el.height()
};

}

// Returns the computed left/right/top/bottom scrollbar widths for the given jQuery element. // WARNING: given element can't have borders (which will cause offsetWidth/offsetHeight to be larger). // NOTE: should use clientLeft/clientTop, but very unreliable cross-browser. function getScrollbarWidths(el) {

var leftRightWidth = el[0].offsetWidth - el[0].clientWidth;
var bottomWidth = el[0].offsetHeight - el[0].clientHeight;
var widths;

leftRightWidth = sanitizeScrollbarWidth(leftRightWidth);
bottomWidth = sanitizeScrollbarWidth(bottomWidth);

widths = { left: 0, right: 0, top: 0, bottom: bottomWidth };

if (getIsLeftRtlScrollbars() && el.css('direction') == 'rtl') { // is the scrollbar on the left side?
        widths.left = leftRightWidth;
}
else {
        widths.right = leftRightWidth;
}

return widths;

}

// The scrollbar width computations in getScrollbarWidths are sometimes flawed when it comes to // retina displays, rounding, and IE11. Massage them into a usable value. function sanitizeScrollbarWidth(width) {

width = Math.max(0, width); // no negatives
width = Math.round(width);
return width;

}

// Logic for determining if, when the element is right-to-left, the scrollbar appears on the left side

var _isLeftRtlScrollbars = null;

function getIsLeftRtlScrollbars() { // responsible for caching the computation

if (_isLeftRtlScrollbars === null) {
        _isLeftRtlScrollbars = computeIsLeftRtlScrollbars();
}
return _isLeftRtlScrollbars;

}

function computeIsLeftRtlScrollbars() { // creates an offscreen test element, then removes it

var el = $('<div><div/></div>')
        .css({
                position: 'absolute',
                top: -1000,
                left: 0,
                border: 0,
                padding: 0,
                overflow: 'scroll',
                direction: 'rtl'
        })
        .appendTo('body');
var innerEl = el.children();
var res = innerEl.offset().left > el.offset().left; // is the inner div shifted to accommodate a left scrollbar?
el.remove();
return res;

}

// Retrieves a jQuery element's computed CSS value as a floating-point number. // If the queried value is non-numeric (ex: IE can return “medium” for border width), will just return zero. function getCssFloat(el, prop) {

return parseFloat(el.css(prop)) || 0;

}

/* Mouse / Touch Utilities ———————————————————————————————————————-*/

FC.preventDefault = preventDefault;

// Returns a boolean whether this was a left mouse click and no ctrl key (which means right click on Mac) function isPrimaryMouseButton(ev) {

return ev.which == 1 && !ev.ctrlKey;

}

function getEvX(ev) {

var touches = ev.originalEvent.touches;

// on mobile FF, pageX for touch events is present, but incorrect,
// so, look at touch coordinates first.
if (touches && touches.length) {
        return touches[0].pageX;
}

return ev.pageX;

}

function getEvY(ev) {

var touches = ev.originalEvent.touches;

// on mobile FF, pageX for touch events is present, but incorrect,
// so, look at touch coordinates first.
if (touches && touches.length) {
        return touches[0].pageY;
}

return ev.pageY;

}

function getEvIsTouch(ev) {

return /^touch/.test(ev.type);

}

function preventSelection(el) {

el.addClass('fc-unselectable')
        .on('selectstart', preventDefault);

}

function allowSelection(el) {

el.removeClass('fc-unselectable')
        .off('selectstart', preventDefault);

}

// Stops a mouse/touch event from doing it's native browser action function preventDefault(ev) {

ev.preventDefault();

}

/* General Geometry Utils ———————————————————————————————————————-*/

FC.intersectRects = intersectRects;

// Returns a new rectangle that is the intersection of the two rectangles. If they don't intersect, returns false function intersectRects(rect1, rect2) {

var res = {
        left: Math.max(rect1.left, rect2.left),
        right: Math.min(rect1.right, rect2.right),
        top: Math.max(rect1.top, rect2.top),
        bottom: Math.min(rect1.bottom, rect2.bottom)
};

if (res.left < res.right && res.top < res.bottom) {
        return res;
}
return false;

}

// Returns a new point that will have been moved to reside within the given rectangle function constrainPoint(point, rect) {

return {
        left: Math.min(Math.max(point.left, rect.left), rect.right),
        top: Math.min(Math.max(point.top, rect.top), rect.bottom)
};

}

// Returns a point that is the center of the given rectangle function getRectCenter(rect) {

return {
        left: (rect.left + rect.right) / 2,
        top: (rect.top + rect.bottom) / 2
};

}

// Subtracts point2's coordinates from point1's coordinates, returning a delta function diffPoints(point1, point2) {

return {
        left: point1.left - point2.left,
        top: point1.top - point2.top
};

}

/* Object Ordering by Field ———————————————————————————————————————-*/

FC.parseFieldSpecs = parseFieldSpecs; FC.compareByFieldSpecs = compareByFieldSpecs; FC.compareByFieldSpec = compareByFieldSpec; FC.flexibleCompare = flexibleCompare;

function parseFieldSpecs(input) {

var specs = [];
var tokens = [];
var i, token;

if (typeof input === 'string') {
        tokens = input.split(/\s*,\s*/);
}
else if (typeof input === 'function') {
        tokens = [ input ];
}
else if ($.isArray(input)) {
        tokens = input;
}

for (i = 0; i < tokens.length; i++) {
        token = tokens[i];

        if (typeof token === 'string') {
                specs.push(
                        token.charAt(0) == '-' ?
                                { field: token.substring(1), order: -1 } :
                                { field: token, order: 1 }
                );
        }
        else if (typeof token === 'function') {
                specs.push({ func: token });
        }
}

return specs;

}

function compareByFieldSpecs(obj1, obj2, fieldSpecs) {

var i;
var cmp;

for (i = 0; i < fieldSpecs.length; i++) {
        cmp = compareByFieldSpec(obj1, obj2, fieldSpecs[i]);
        if (cmp) {
                return cmp;
        }
}

return 0;

}

function compareByFieldSpec(obj1, obj2, fieldSpec) {

if (fieldSpec.func) {
        return fieldSpec.func(obj1, obj2);
}
return flexibleCompare(obj1[fieldSpec.field], obj2[fieldSpec.field]) *
        (fieldSpec.order || 1);

}

function flexibleCompare(a, b) {

if (!a && !b) {
        return 0;
}
if (b == null) {
        return -1;
}
if (a == null) {
        return 1;
}
if ($.type(a) === 'string' || $.type(b) === 'string') {
        return String(a).localeCompare(String(b));
}
return a - b;

}

/* Date Utilities ———————————————————————————————————————-*/

FC.computeGreatestUnit = computeGreatestUnit; FC.divideRangeByDuration = divideRangeByDuration; FC.divideDurationByDuration = divideDurationByDuration; FC.multiplyDuration = multiplyDuration; FC.durationHasTime = durationHasTime;

var dayIDs = [ 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat' ]; var unitsDesc = [ 'year', 'month', 'week', 'day', 'hour', 'minute', 'second', 'millisecond' ]; // descending

// Diffs the two moments into a Duration where full-days are recorded first, then the remaining time. // Moments will have their timezones normalized. function diffDayTime(a, b) {

return moment.duration({
        days: a.clone().stripTime().diff(b.clone().stripTime(), 'days'),
        ms: a.time() - b.time() // time-of-day from day start. disregards timezone
});

}

// Diffs the two moments via their start-of-day (regardless of timezone). Produces whole-day durations. function diffDay(a, b) {

return moment.duration({
        days: a.clone().stripTime().diff(b.clone().stripTime(), 'days')
});

}

// Diffs two moments, producing a duration, made of a whole-unit-increment of the given unit. Uses rounding. function diffByUnit(a, b, unit) {

return moment.duration(
        Math.round(a.diff(b, unit, true)), // returnFloat=true
        unit
);

}

// Computes the unit name of the largest whole-unit period of time. // For example, 48 hours will be “days” whereas 49 hours will be “hours”. // Accepts start/end, a range object, or an original duration object. function computeGreatestUnit(start, end) {

var i, unit;
var val;

for (i = 0; i < unitsDesc.length; i++) {
        unit = unitsDesc[i];
        val = computeRangeAs(unit, start, end);

        if (val >= 1 && isInt(val)) {
                break;
        }
}

return unit; // will be "milliseconds" if nothing else matches

}

// like computeGreatestUnit, but has special abilities to interpret the source input for clues function computeDurationGreatestUnit(duration, durationInput) {

var unit = computeGreatestUnit(duration);

// prevent days:7 from being interpreted as a week
if (unit === 'week' && typeof durationInput === 'object' && durationInput.days) {
        unit = 'day';
}

return unit;

}

// Computes the number of units (like “hours”) in the given range. // Range can be a {start,end} object, separate start/end args, or a Duration. // Results are based on Moment's .as() and .diff() methods, so results can depend on internal handling // of month-diffing logic (which tends to vary from version to version). function computeRangeAs(unit, start, end) {

if (end != null) { // given start, end
        return end.diff(start, unit, true);
}
else if (moment.isDuration(start)) { // given duration
        return start.as(unit);
}
else { // given { start, end } range object
        return start.end.diff(start.start, unit, true);
}

}

// Intelligently divides a range (specified by a start/end params) by a duration function divideRangeByDuration(start, end, dur) {

var months;

if (durationHasTime(dur)) {
        return (end - start) / dur;
}
months = dur.asMonths();
if (Math.abs(months) >= 1 && isInt(months)) {
        return end.diff(start, 'months', true) / months;
}
return end.diff(start, 'days', true) / dur.asDays();

}

// Intelligently divides one duration by another function divideDurationByDuration(dur1, dur2) {

var months1, months2;

if (durationHasTime(dur1) || durationHasTime(dur2)) {
        return dur1 / dur2;
}
months1 = dur1.asMonths();
months2 = dur2.asMonths();
if (
        Math.abs(months1) >= 1 && isInt(months1) &&
        Math.abs(months2) >= 1 && isInt(months2)
) {
        return months1 / months2;
}
return dur1.asDays() / dur2.asDays();

}

// Intelligently multiplies a duration by a number function multiplyDuration(dur, n) {

var months;

if (durationHasTime(dur)) {
        return moment.duration(dur * n);
}
months = dur.asMonths();
if (Math.abs(months) >= 1 && isInt(months)) {
        return moment.duration({ months: months * n });
}
return moment.duration({ days: dur.asDays() * n });

}

// Returns a boolean about whether the given duration has any time parts (hours/minutes/seconds/ms) function durationHasTime(dur) {

return Boolean(dur.hours() || dur.minutes() || dur.seconds() || dur.milliseconds());

}

function isNativeDate(input) {

return  Object.prototype.toString.call(input) === '[object Date]' || input instanceof Date;

}

// Returns a boolean about whether the given input is a time string, like “06:40:00” or “06:00” function isTimeString(str) {

return typeof str === 'string' &&
        /^\d+\:\d+(?:\:\d+\.?(?:\d{3})?)?$/.test(str);

}

/* Logging and Debug ———————————————————————————————————————-*/

FC.log = function() {

var console = window.console;

if (console && console.log) {
        return console.log.apply(console, arguments);
}

};

FC.warn = function() {

var console = window.console;

if (console && console.warn) {
        return console.warn.apply(console, arguments);
}
else {
        return FC.log.apply(FC, arguments);
}

};

/* General Utilities ———————————————————————————————————————-*/

var hasOwnPropMethod = {}.hasOwnProperty;

// Merges an array of objects into a single object. // The second argument allows for an array of property names who's object values will be merged together. function mergeProps(propObjs, complexProps) {

var dest = {};
var i, name;
var complexObjs;
var j, val;
var props;

if (complexProps) {
        for (i = 0; i < complexProps.length; i++) {
                name = complexProps[i];
                complexObjs = [];

                // collect the trailing object values, stopping when a non-object is discovered
                for (j = propObjs.length - 1; j >= 0; j--) {
                        val = propObjs[j][name];

                        if (typeof val === 'object') {
                                complexObjs.unshift(val);
                        }
                        else if (val !== undefined) {
                                dest[name] = val; // if there were no objects, this value will be used
                                break;
                        }
                }

                // if the trailing values were objects, use the merged value
                if (complexObjs.length) {
                        dest[name] = mergeProps(complexObjs);
                }
        }
}

// copy values into the destination, going from last to first
for (i = propObjs.length - 1; i >= 0; i--) {
        props = propObjs[i];

        for (name in props) {
                if (!(name in dest)) { // if already assigned by previous props or complex props, don't reassign
                        dest[name] = props[name];
                }
        }
}

return dest;

}

function copyOwnProps(src, dest) {

for (var name in src) {
        if (hasOwnProp(src, name)) {
                dest[name] = src[name];
        }
}

}

function hasOwnProp(obj, name) {

return hasOwnPropMethod.call(obj, name);

}

function applyAll(functions, thisObj, args) {

if ($.isFunction(functions)) {
        functions = [ functions ];
}
if (functions) {
        var i;
        var ret;
        for (i=0; i<functions.length; i++) {
                ret = functions[i].apply(thisObj, args) || ret;
        }
        return ret;
}

}

function removeMatching(array, testFunc) {

var removeCnt = 0;
var i = 0;

while (i < array.length) {
        if (testFunc(array[i])) { // truthy value means *remove*
                array.splice(i, 1);
                removeCnt++;
        }
        else {
                i++;
        }
}

return removeCnt;

}

function removeExact(array, exactVal) {

var removeCnt = 0;
var i = 0;

while (i < array.length) {
        if (array[i] === exactVal) {
                array.splice(i, 1);
                removeCnt++;
        }
        else {
                i++;
        }
}

return removeCnt;

} FC.removeExact = removeExact;

function firstDefined() {

for (var i=0; i<arguments.length; i++) {
        if (arguments[i] !== undefined) {
                return arguments[i];
        }
}

}

function htmlEscape(s) {

return (s + '').replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/'/g, '&#039;')
        .replace(/"/g, '&quot;')
        .replace(/\n/g, '<br />');

}

function stripHtmlEntities(text) {

return text.replace(/&.*?;/g, '');

}

// Given a hash of CSS properties, returns a string of CSS. // Uses property names as-is (no camel-case conversion). Will not make statements for null/undefined values. function cssToStr(cssProps) {

var statements = [];

$.each(cssProps, function(name, val) {
        if (val != null) {
                statements.push(name + ':' + val);
        }
});

return statements.join(';');

}

// Given an object hash of HTML attribute names to values, // generates a string that can be injected between < > in HTML function attrsToStr(attrs) {

var parts = [];

$.each(attrs, function(name, val) {
        if (val != null) {
                parts.push(name + '="' + htmlEscape(val) + '"');
        }
});

return parts.join(' ');

}

function capitaliseFirstLetter(str) {

return str.charAt(0).toUpperCase() + str.slice(1);

}

function compareNumbers(a, b) { // for .sort()

return a - b;

}

function isInt(n) {

return n % 1 === 0;

}

// Returns a method bound to the given object context. // Just like one of the jQuery.proxy signatures, but without the undesired behavior of treating the same method with // different contexts as identical when binding/unbinding events. function proxy(obj, methodName) {

var method = obj[methodName];

return function() {
        return method.apply(obj, arguments);
};

}

// Returns a function, that, as long as it continues to be invoked, will not // be triggered. The function will be called after it stops being called for // N milliseconds. If `immediate` is passed, trigger the function on the // leading edge, instead of the trailing. // github.com/jashkenas/underscore/blob/1.6.0/underscore.js#L714 function debounce(func, wait, immediate) {

var timeout, args, context, timestamp, result;

var later = function() {
        var last = +new Date() - timestamp;
        if (last < wait) {
                timeout = setTimeout(later, wait - last);
        }
        else {
                timeout = null;
                if (!immediate) {
                        result = func.apply(context, args);
                        context = args = null;
                }
        }
};

return function() {
        context = this;
        args = arguments;
        timestamp = +new Date();
        var callNow = immediate && !timeout;
        if (!timeout) {
                timeout = setTimeout(later, wait);
        }
        if (callNow) {
                result = func.apply(context, args);
                context = args = null;
        }
        return result;
};

}

;;

/* GENERAL NOTE on moments throughout the *entire rest* of the codebase: All moments are assumed to be ambiguously-zoned unless otherwise noted, with the NOTABLE EXCEOPTION of start/end dates that live on *Event Objects*. Ambiguously-TIMED moments are assumed to be ambiguously-zoned by nature. */

var ambigDateOfMonthRegex = /^s*d{4}-dd$/; var ambigTimeOrZoneRegex =

/^\s*\d{4}-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?)?$/;

var newMomentProto = moment.fn; // where we will attach our new methods var oldMomentProto = $.extend({}, newMomentProto); // copy of original moment methods

// tell momentjs to transfer these properties upon clone var momentProperties = moment.momentProperties; momentProperties.push('_fullCalendar'); momentProperties.push('_ambigTime'); momentProperties.push('_ambigZone');

// Creating // ————————————————————————————————-

// Creates a new moment, similar to the vanilla moment(…) constructor, but with // extra features (ambiguous time, enhanced formatting). When given an existing moment, // it will function as a clone (and retain the zone of the moment). Anything else will // result in a moment in the local zone. FC.moment = function() {

return makeMoment(arguments);

};

// Sames as FC.moment, but forces the resulting moment to be in the UTC timezone. FC.moment.utc = function() {

var mom = makeMoment(arguments, true);

// Force it into UTC because makeMoment doesn't guarantee it
// (if given a pre-existing moment for example)
if (mom.hasTime()) { // don't give ambiguously-timed moments a UTC zone
        mom.utc();
}

return mom;

};

// Same as FC.moment, but when given an ISO8601 string, the timezone offset is preserved. // ISO8601 strings with no timezone offset will become ambiguously zoned. FC.moment.parseZone = function() {

return makeMoment(arguments, true, true);

};

// Builds an enhanced moment from args. When given an existing moment, it clones. When given a // native Date, or called with no arguments (the current time), the resulting moment will be local. // Anything else needs to be “parsed” (a string or an array), and will be affected by: // parseAsUTC - if there is no zone information, should we parse the input in UTC? // parseZone - if there is zone information, should we force the zone of the moment? function makeMoment(args, parseAsUTC, parseZone) {

var input = args[0];
var isSingleString = args.length == 1 && typeof input === 'string';
var isAmbigTime;
var isAmbigZone;
var ambigMatch;
var mom;

if (moment.isMoment(input) || isNativeDate(input) || input === undefined) {
        mom = moment.apply(null, args);
}
else { // "parsing" is required
        isAmbigTime = false;
        isAmbigZone = false;

        if (isSingleString) {
                if (ambigDateOfMonthRegex.test(input)) {
                        // accept strings like '2014-05', but convert to the first of the month
                        input += '-01';
                        args = [ input ]; // for when we pass it on to moment's constructor
                        isAmbigTime = true;
                        isAmbigZone = true;
                }
                else if ((ambigMatch = ambigTimeOrZoneRegex.exec(input))) {
                        isAmbigTime = !ambigMatch[5]; // no time part?
                        isAmbigZone = true;
                }
        }
        else if ($.isArray(input)) {
                // arrays have no timezone information, so assume ambiguous zone
                isAmbigZone = true;
        }
        // otherwise, probably a string with a format

        if (parseAsUTC || isAmbigTime) {
                mom = moment.utc.apply(moment, args);
        }
        else {
                mom = moment.apply(null, args);
        }

        if (isAmbigTime) {
                mom._ambigTime = true;
                mom._ambigZone = true; // ambiguous time always means ambiguous zone
        }
        else if (parseZone) { // let's record the inputted zone somehow
                if (isAmbigZone) {
                        mom._ambigZone = true;
                }
                else if (isSingleString) {
                        mom.utcOffset(input); // if not a valid zone, will assign UTC
                }
        }
}

mom._fullCalendar = true; // flag for extended functionality

return mom;

}

// Week Number // ————————————————————————————————-

// Returns the week number, considering the locale's custom week number calcuation // `weeks` is an alias for `week` newMomentProto.week = newMomentProto.weeks = function(input) {

var weekCalc = this._locale._fullCalendar_weekCalc;

if (input == null && typeof weekCalc === 'function') { // custom function only works for getter
        return weekCalc(this);
}
else if (weekCalc === 'ISO') {
        return oldMomentProto.isoWeek.apply(this, arguments); // ISO getter/setter
}

return oldMomentProto.week.apply(this, arguments); // local getter/setter

};

// Time-of-day // ————————————————————————————————-

// GETTER // Returns a Duration with the hours/minutes/seconds/ms values of the moment. // If the moment has an ambiguous time, a duration of 00:00 will be returned. // // SETTER // You can supply a Duration, a Moment, or a Duration-like argument. // When setting the time, and the moment has an ambiguous time, it then becomes unambiguous. newMomentProto.time = function(time) {

// Fallback to the original method (if there is one) if this moment wasn't created via FullCalendar.
// `time` is a generic enough method name where this precaution is necessary to avoid collisions w/ other plugins.
if (!this._fullCalendar) {
        return oldMomentProto.time.apply(this, arguments);
}

if (time == null) { // getter
        return moment.duration({
                hours: this.hours(),
                minutes: this.minutes(),
                seconds: this.seconds(),
                milliseconds: this.milliseconds()
        });
}
else { // setter

        this._ambigTime = false; // mark that the moment now has a time

        if (!moment.isDuration(time) && !moment.isMoment(time)) {
                time = moment.duration(time);
        }

        // The day value should cause overflow (so 24 hours becomes 00:00:00 of next day).
        // Only for Duration times, not Moment times.
        var dayHours = 0;
        if (moment.isDuration(time)) {
                dayHours = Math.floor(time.asDays()) * 24;
        }

        // We need to set the individual fields.
        // Can't use startOf('day') then add duration. In case of DST at start of day.
        return this.hours(dayHours + time.hours())
                .minutes(time.minutes())
                .seconds(time.seconds())
                .milliseconds(time.milliseconds());
}

};

// Converts the moment to UTC, stripping out its time-of-day and timezone offset, // but preserving its YMD. A moment with a stripped time will display no time // nor timezone offset when .format() is called. newMomentProto.stripTime = function() {

if (!this._ambigTime) {

        this.utc(true); // keepLocalTime=true (for keeping *date* value)

        // set time to zero
        this.set({
                hours: 0,
                minutes: 0,
                seconds: 0,
                ms: 0
        });

        // Mark the time as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
        // which clears all ambig flags.
        this._ambigTime = true;
        this._ambigZone = true; // if ambiguous time, also ambiguous timezone offset
}

return this; // for chaining

};

// Returns if the moment has a non-ambiguous time (boolean) newMomentProto.hasTime = function() {

return !this._ambigTime;

};

// Timezone // ————————————————————————————————-

// Converts the moment to UTC, stripping out its timezone offset, but preserving its // YMD and time-of-day. A moment with a stripped timezone offset will display no // timezone offset when .format() is called. newMomentProto.stripZone = function() {

var wasAmbigTime;

if (!this._ambigZone) {

        wasAmbigTime = this._ambigTime;

        this.utc(true); // keepLocalTime=true (for keeping date and time values)

        // the above call to .utc()/.utcOffset() unfortunately might clear the ambig flags, so restore
        this._ambigTime = wasAmbigTime || false;

        // Mark the zone as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
        // which clears the ambig flags.
        this._ambigZone = true;
}

return this; // for chaining

};

// Returns of the moment has a non-ambiguous timezone offset (boolean) newMomentProto.hasZone = function() {

return !this._ambigZone;

};

// implicitly marks a zone newMomentProto.local = function(keepLocalTime) {

// for when converting from ambiguously-zoned to local,
// keep the time values when converting from UTC -> local
oldMomentProto.local.call(this, this._ambigZone || keepLocalTime);

// ensure non-ambiguous
// this probably already happened via local() -> utcOffset(), but don't rely on Moment's internals
this._ambigTime = false;
this._ambigZone = false;

return this; // for chaining

};

// implicitly marks a zone newMomentProto.utc = function(keepLocalTime) {

oldMomentProto.utc.call(this, keepLocalTime);

// ensure non-ambiguous
// this probably already happened via utc() -> utcOffset(), but don't rely on Moment's internals
this._ambigTime = false;
this._ambigZone = false;

return this;

};

// implicitly marks a zone (will probably get called upon .utc() and .local()) newMomentProto.utcOffset = function(tzo) {

if (tzo != null) { // setter
        // these assignments needs to happen before the original zone method is called.
        // I forget why, something to do with a browser crash.
        this._ambigTime = false;
        this._ambigZone = false;
}

return oldMomentProto.utcOffset.apply(this, arguments);

};

// Formatting // ————————————————————————————————-

newMomentProto.format = function() {

if (this._fullCalendar && arguments[0]) { // an enhanced moment? and a format string provided?
        return formatDate(this, arguments[0]); // our extended formatting
}
if (this._ambigTime) {
        return oldMomentFormat(englishMoment(this), 'YYYY-MM-DD');
}
if (this._ambigZone) {
        return oldMomentFormat(englishMoment(this), 'YYYY-MM-DD[T]HH:mm:ss');
}
if (this._fullCalendar) { // enhanced non-ambig moment?
        // moment.format() doesn't ensure english, but we want to.
        return oldMomentFormat(englishMoment(this));
}

return oldMomentProto.format.apply(this, arguments);

};

newMomentProto.toISOString = function() {

if (this._ambigTime) {
        return oldMomentFormat(englishMoment(this), 'YYYY-MM-DD');
}
if (this._ambigZone) {
        return oldMomentFormat(englishMoment(this), 'YYYY-MM-DD[T]HH:mm:ss');
}
if (this._fullCalendar) { // enhanced non-ambig moment?
        // depending on browser, moment might not output english. ensure english.
        // https://github.com/moment/moment/blob/2.18.1/src/lib/moment/format.js#L22
        return oldMomentProto.toISOString.apply(englishMoment(this), arguments);
}

return oldMomentProto.toISOString.apply(this, arguments);

};

function englishMoment(mom) {

if (mom.locale() !== 'en') {
        return mom.clone().locale('en');
}
return mom;

}

;; (function() {

// exports FC.formatDate = formatDate; FC.formatRange = formatRange; FC.oldMomentFormat = oldMomentFormat; FC.queryMostGranularFormatUnit = queryMostGranularFormatUnit;

// Config // ———————————————————————————————————————

/* Inserted between chunks in the fake (“intermediate”) formatting string. Important that it passes as whitespace (s) because moment often identifies non-standalone months via a regexp with an s. */ var PART_SEPARATOR = 'u000b'; // vertical tab

/* Inserted as the first character of a literal-text chunk to indicate that the literal text is not actually literal text, but rather, a “special” token that has custom rendering (see specialTokens map). */ var SPECIAL_TOKEN_MARKER = 'u001f'; // information separator 1

/* Inserted at the beginning and end of a span of text that must have non-zero numeric characters. Handling of these markers is done in a post-processing step at the very end of text rendering. */ var MAYBE_MARKER = 'u001e'; // information separator 2 var MAYBE_REGEXP = new RegExp(MAYBE_MARKER + '([^' + MAYBE_MARKER + ']*)' + MAYBE_MARKER, 'g'); // must be global

/* Addition formatting tokens we want recognized */ var specialTokens = {

t: function(date) { // "a" or "p"
        return oldMomentFormat(date, 'a').charAt(0);
},
T: function(date) { // "A" or "P"
        return oldMomentFormat(date, 'A').charAt(0);
}

};

/* The first characters of formatting tokens for units that are 1 day or larger. `value` is for ranking relative size (lower means bigger). `unit` is a normalized unit, used for comparing moments. */ var largeTokenMap = {

Y: { value: 1, unit: 'year' },
M: { value: 2, unit: 'month' },
W: { value: 3, unit: 'week' }, // ISO week
w: { value: 3, unit: 'week' }, // local week
D: { value: 4, unit: 'day' }, // day of month
d: { value: 4, unit: 'day' } // day of week

};

// Single Date Formatting // ———————————————————————————————————————

/* Formats `date` with a Moment formatting string, but allow our non-zero areas and special token */ function formatDate(date, formatStr) {

return renderFakeFormatString(
        getParsedFormatString(formatStr).fakeFormatString,
        date
);

}

/* Call this if you want Moment's original format method to be used */ function oldMomentFormat(mom, formatStr) {

return oldMomentProto.format.call(mom, formatStr); // oldMomentProto defined in moment-ext.js

}

// Date Range Formatting // ————————————————————————————————- // TODO: make it work with timezone offset

/* Using a formatting string meant for a single date, generate a range string, like “Sep 2 - 9 2013”, that intelligently inserts a separator where the dates differ. If the dates are the same as far as the format string is concerned, just return a single rendering of one date, without any separator. */ function formatRange(date1, date2, formatStr, separator, isRTL) {

var localeData;

date1 = FC.moment.parseZone(date1);
date2 = FC.moment.parseZone(date2);

localeData = date1.localeData();

// Expand localized format strings, like "LL" -> "MMMM D YYYY".
// BTW, this is not important for `formatDate` because it is impossible to put custom tokens
// or non-zero areas in Moment's localized format strings.
formatStr = localeData.longDateFormat(formatStr) || formatStr;

return renderParsedFormat(
        getParsedFormatString(formatStr),
        date1,
        date2,
        separator || ' - ',
        isRTL
);

}

/* Renders a range with an already-parsed format string. */ function renderParsedFormat(parsedFormat, date1, date2, separator, isRTL) {

var sameUnits = parsedFormat.sameUnits;
var unzonedDate1 = date1.clone().stripZone(); // for same-unit comparisons
var unzonedDate2 = date2.clone().stripZone(); // "

var renderedParts1 = renderFakeFormatStringParts(parsedFormat.fakeFormatString, date1);
var renderedParts2 = renderFakeFormatStringParts(parsedFormat.fakeFormatString, date2);

var leftI;
var leftStr = '';
var rightI;
var rightStr = '';
var middleI;
var middleStr1 = '';
var middleStr2 = '';
var middleStr = '';

// Start at the leftmost side of the formatting string and continue until you hit a token
// that is not the same between dates.
for (
        leftI = 0;
        leftI < sameUnits.length && (!sameUnits[leftI] || unzonedDate1.isSame(unzonedDate2, sameUnits[leftI]));
        leftI++
) {
        leftStr += renderedParts1[leftI];
}

// Similarly, start at the rightmost side of the formatting string and move left
for (
        rightI = sameUnits.length - 1;
        rightI > leftI && (!sameUnits[rightI] || unzonedDate1.isSame(unzonedDate2, sameUnits[rightI]));
        rightI--
) {
        // If current chunk is on the boundary of unique date-content, and is a special-case
        // date-formatting postfix character, then don't consume it. Consider it unique date-content.
        // TODO: make configurable
        if (rightI - 1 === leftI && renderedParts1[rightI] === '.') {
                break;
        }

        rightStr = renderedParts1[rightI] + rightStr;
}

// The area in the middle is different for both of the dates.
// Collect them distinctly so we can jam them together later.
for (middleI = leftI; middleI <= rightI; middleI++) {
        middleStr1 += renderedParts1[middleI];
        middleStr2 += renderedParts2[middleI];
}

if (middleStr1 || middleStr2) {
        if (isRTL) {
                middleStr = middleStr2 + separator + middleStr1;
        }
        else {
                middleStr = middleStr1 + separator + middleStr2;
        }
}

return processMaybeMarkers(
        leftStr + middleStr + rightStr
);

}

// Format String Parsing // ———————————————————————————————————————

var parsedFormatStrCache = {};

/* Returns a parsed format string, leveraging a cache. */ function getParsedFormatString(formatStr) {

return parsedFormatStrCache[formatStr] ||
        (parsedFormatStrCache[formatStr] = parseFormatString(formatStr));

}

/* Parses a format string into the following:

*/ function parseFormatString(formatStr) {

var chunks = chunkFormatString(formatStr);

return {
        fakeFormatString: buildFakeFormatString(chunks),
        sameUnits: buildSameUnits(chunks)
};

}

/* Break the formatting string into an array of chunks. A 'maybe' chunk will have nested chunks. */ function chunkFormatString(formatStr) {

var chunks = [];
var match;

// TODO: more descrimination
// \4 is a backreference to the first character of a multi-character set.
var chunker = /\[([^\]]*)\]|\(([^\)]*)\)|(LTS|LT|(\w)\4*o?)|([^\w\[\(]+)/g;

while ((match = chunker.exec(formatStr))) {
        if (match[1]) { // a literal string inside [ ... ]
                chunks.push.apply(chunks, // append
                        splitStringLiteral(match[1])
                );
        }
        else if (match[2]) { // non-zero formatting inside ( ... )
                chunks.push({ maybe: chunkFormatString(match[2]) });
        }
        else if (match[3]) { // a formatting token
                chunks.push({ token: match[3] });
        }
        else if (match[5]) { // an unenclosed literal string
                chunks.push.apply(chunks, // append
                        splitStringLiteral(match[5])
                );
        }
}

return chunks;

}

/* Potentially splits a literal-text string into multiple parts. For special cases. */ function splitStringLiteral(s) {

if (s === '. ') {
        return [ '.', ' ' ]; // for locales with periods bound to the end of each year/month/date
}
else {
        return [ s ];
}

}

/* Given chunks parsed from a real format string, generate a fake (aka “intermediate”) format string with special control characters that will eventually be given to moment for formatting, and then post-processed. */ function buildFakeFormatString(chunks) {

var parts = [];
var i, chunk;

for (i = 0; i < chunks.length; i++) {
        chunk = chunks[i];

        if (typeof chunk === 'string') {
                parts.push('[' + chunk + ']');
        }
        else if (chunk.token) {
                if (chunk.token in specialTokens) {
                        parts.push(
                                SPECIAL_TOKEN_MARKER + // useful during post-processing
                                '[' + chunk.token + ']' // preserve as literal text
                        );
                }
                else {
                        parts.push(chunk.token); // unprotected text implies a format string
                }
        }
        else if (chunk.maybe) {
                parts.push(
                        MAYBE_MARKER + // useful during post-processing
                        buildFakeFormatString(chunk.maybe) +
                        MAYBE_MARKER
                );
        }
}

return parts.join(PART_SEPARATOR);

}

/* Given parsed chunks from a real formatting string, generates an array of unit strings (like “day”) that indicate in which regard two dates must be similar in order to share range formatting text. The `chunks` can be nested (because of “maybe” chunks), however, the returned array will be flat. */ function buildSameUnits(chunks) {

var units = [];
var i, chunk;
var tokenInfo;

for (i = 0; i < chunks.length; i++) {
        chunk = chunks[i];

        if (chunk.token) {
                tokenInfo = largeTokenMap[chunk.token.charAt(0)];
                units.push(tokenInfo ? tokenInfo.unit : 'second'); // default to a very strict same-second
        }
        else if (chunk.maybe) {
                units.push.apply(units, // append
                        buildSameUnits(chunk.maybe)
                );
        }
        else {
                units.push(null);
        }
}

return units;

}

// Rendering to text // ———————————————————————————————————————

/* Formats a date with a fake format string, post-processes the control characters, then returns. */ function renderFakeFormatString(fakeFormatString, date) {

return processMaybeMarkers(
        renderFakeFormatStringParts(fakeFormatString, date).join('')
);

}

/* Formats a date into parts that will have been post-processed, EXCEPT for the “maybe” markers. */ function renderFakeFormatStringParts(fakeFormatString, date) {

var parts = [];
var fakeRender = oldMomentFormat(date, fakeFormatString);
var fakeParts = fakeRender.split(PART_SEPARATOR);
var i, fakePart;

for (i = 0; i < fakeParts.length; i++) {
        fakePart = fakeParts[i];

        if (fakePart.charAt(0) === SPECIAL_TOKEN_MARKER) {
                parts.push(
                        // the literal string IS the token's name.
                        // call special token's registered function.
                        specialTokens[fakePart.substring(1)](date)
                );
        }
        else {
                parts.push(fakePart);
        }
}

return parts;

}

/* Accepts an almost-finally-formatted string and processes the “maybe” control characters, returning a new string. */ function processMaybeMarkers(s) {

return s.replace(MAYBE_REGEXP, function(m0, m1) { // regex assumed to have 'g' flag
        if (m1.match(/[1-9]/)) { // any non-zero numeric characters?
                return m1;
        }
        else {
                return '';
        }
});

}

// Misc Utils // ————————————————————————————————-

/* Returns a unit string, either 'year', 'month', 'day', or null for the most granular formatting token in the string. */ function queryMostGranularFormatUnit(formatStr) {

var chunks = chunkFormatString(formatStr);
var i, chunk;
var candidate;
var best;

for (i = 0; i < chunks.length; i++) {
        chunk = chunks[i];

        if (chunk.token) {
                candidate = largeTokenMap[chunk.token.charAt(0)];
                if (candidate) {
                        if (!best || candidate.value > best.value) {
                                best = candidate;
                        }
                }
        }
}

if (best) {
        return best.unit;
}

return null;

};

})();

// quick local references var formatDate = FC.formatDate; var formatRange = FC.formatRange; var oldMomentFormat = FC.oldMomentFormat;

;;

FC.Class = Class; // export

// Class that all other classes will inherit from function Class() { }

// Called on a class to create a subclass. // Last argument contains instance methods. Any argument before the last are considered mixins. Class.extend = function() {

var members = {};
var i;

for (i = 0; i < arguments.length; i++) {
        copyOwnProps(arguments[i], members);
}

return extendClass(this, members);

};

// Adds new member variables/methods to the class's prototype. // Can be called with another class, or a plain object hash containing new members. Class.mixin = function(members) {

copyOwnProps(members, this.prototype);

};

function extendClass(superClass, members) {

var subClass;

// ensure a constructor for the subclass, forwarding all arguments to the super-constructor if it doesn't exist
if (hasOwnProp(members, 'constructor')) {
        subClass = members.constructor;
}
if (typeof subClass !== 'function') {
        subClass = members.constructor = function() {
                superClass.apply(this, arguments);
        };
}

// build the base prototype for the subclass, which is an new object chained to the superclass's prototype
subClass.prototype = Object.create(superClass.prototype);

// copy each member variable/method onto the the subclass's prototype
copyOwnProps(members, subClass.prototype);

// copy over all class variables/methods to the subclass, such as `extend` and `mixin`
copyOwnProps(superClass, subClass);

return subClass;

}

;;

var EmitterMixin = FC.EmitterMixin = {

// jQuery-ification via $(this) allows a non-DOM object to have
// the same event handling capabilities (including namespaces).

on: function(types, handler) {
        $(this).on(types, this._prepareIntercept(handler));
        return this; // for chaining
},

one: function(types, handler) {
        $(this).one(types, this._prepareIntercept(handler));
        return this; // for chaining
},

_prepareIntercept: function(handler) {
        // handlers are always called with an "event" object as their first param.
        // sneak the `this` context and arguments into the extra parameter object
        // and forward them on to the original handler.
        var intercept = function(ev, extra) {
                return handler.apply(
                        extra.context || this,
                        extra.args || []
                );
        };

        // mimick jQuery's internal "proxy" system (risky, I know)
        // causing all functions with the same .guid to appear to be the same.
        // https://github.com/jquery/jquery/blob/2.2.4/src/core.js#L448
        // this is needed for calling .off with the original non-intercept handler.
        if (!handler.guid) {
                handler.guid = $.guid++;
        }
        intercept.guid = handler.guid;

        return intercept;
},

off: function(types, handler) {
        $(this).off(types, handler);

        return this; // for chaining
},

trigger: function(types) {
        var args = Array.prototype.slice.call(arguments, 1); // arguments after the first

        // pass in "extra" info to the intercept
        $(this).triggerHandler(types, { args: args });

        return this; // for chaining
},

triggerWith: function(types, context, args) {

        // `triggerHandler` is less reliant on the DOM compared to `trigger`.
        // pass in "extra" info to the intercept.
        $(this).triggerHandler(types, { context: context, args: args });

        return this; // for chaining
},

hasHandlers: function(type) {
        var hash = $._data(this, 'events'); // http://blog.jquery.com/2012/08/09/jquery-1-8-released/

        return hash && hash[type] && hash[type].length > 0;
}

};

;;

/* Utility methods for easily listening to events on another object, and more importantly, easily unlistening from them. */ var ListenerMixin = FC.ListenerMixin = (function() {

var guid = 0;
var ListenerMixin = {

        listenerId: null,

        /*
        Given an `other` object that has on/off methods, bind the given `callback` to an event by the given name.
        The `callback` will be called with the `this` context of the object that .listenTo is being called on.
        Can be called:
                .listenTo(other, eventName, callback)
        OR
                .listenTo(other, {
                        eventName1: callback1,
                        eventName2: callback2
                })
        */
        listenTo: function(other, arg, callback) {
                if (typeof arg === 'object') { // given dictionary of callbacks
                        for (var eventName in arg) {
                                if (arg.hasOwnProperty(eventName)) {
                                        this.listenTo(other, eventName, arg[eventName]);
                                }
                        }
                }
                else if (typeof arg === 'string') {
                        other.on(
                                arg + '.' + this.getListenerNamespace(), // use event namespacing to identify this object
                                $.proxy(callback, this) // always use `this` context
                                        // the usually-undesired jQuery guid behavior doesn't matter,
                                        // because we always unbind via namespace
                        );
                }
        },

        /*
        Causes the current object to stop listening to events on the `other` object.
        `eventName` is optional. If omitted, will stop listening to ALL events on `other`.
        */
        stopListeningTo: function(other, eventName) {
                other.off((eventName || '') + '.' + this.getListenerNamespace());
        },

        /*
        Returns a string, unique to this object, to be used for event namespacing
        */
        getListenerNamespace: function() {
                if (this.listenerId == null) {
                        this.listenerId = guid++;
                }
                return '_listener' + this.listenerId;
        }

};
return ListenerMixin;

})(); ;;

var ParsableModelMixin = {

standardPropMap: {}, // will be cloned by allowRawProps

/*
Returns true/false for success
*/
applyRawProps: function(rawProps) {
        var standardPropMap = this.standardPropMap;
        var manualProps = {};
        var otherProps = {};
        var propName;

        for (propName in rawProps) {
                if (standardPropMap[propName] === true) { // copy automatically
                        this[propName] = rawProps[propName];
                }
                else if (standardPropMap[propName] === false) {
                        manualProps[propName] = rawProps[propName];
                }
                else {
                        otherProps[propName] = rawProps[propName];
                }
        }

        this.applyOtherRawProps(otherProps);

        return this.applyManualRawProps(manualProps);
},

/*
If subclasses override, they must call this supermethod and return the boolean response.
*/
applyManualRawProps: function(rawProps) {
        return true;
},

applyOtherRawProps: function(rawProps) {
        // subclasses can implement
}

};

/* TODO: devise a better system */ var ParsableModelMixin_allowRawProps = function(propDefs) {

var proto = this.prototype;

proto.standardPropMap = Object.create(proto.standardPropMap);

copyOwnProps(propDefs, proto.standardPropMap);

};

/* TODO: devise a better system */ var ParsableModelMixin_copyVerbatimStandardProps = function(src, dest) {

var map = this.prototype.standardPropMap;
var propName;

for (propName in map) {
        if (
                src[propName] != null && // in the src object?
                map[propName] === true // false means "copy verbatim"
        ) {
                dest[propName] = src[propName];
        }
}

};

;;

var Model = Class.extend(EmitterMixin, ListenerMixin, {

_props: null,
_watchers: null,
_globalWatchArgs: null,

constructor: function() {
        this._watchers = {};
        this._props = {};
        this.applyGlobalWatchers();
},

applyGlobalWatchers: function() {
        var argSets = this._globalWatchArgs || [];
        var i;

        for (i = 0; i < argSets.length; i++) {
                this.watch.apply(this, argSets[i]);
        }
},

has: function(name) {
        return name in this._props;
},

get: function(name) {
        if (name === undefined) {
                return this._props;
        }

        return this._props[name];
},

set: function(name, val) {
        var newProps;

        if (typeof name === 'string') {
                newProps = {};
                newProps[name] = val === undefined ? null : val;
        }
        else {
                newProps = name;
        }

        this.setProps(newProps);
},

reset: function(newProps) {
        var oldProps = this._props;
        var changeset = {}; // will have undefined's to signal unsets
        var name;

        for (name in oldProps) {
                changeset[name] = undefined;
        }

        for (name in newProps) {
                changeset[name] = newProps[name];
        }

        this.setProps(changeset);
},

unset: function(name) { // accepts a string or array of strings
        var newProps = {};
        var names;
        var i;

        if (typeof name === 'string') {
                names = [ name ];
        }
        else {
                names = name;
        }

        for (i = 0; i < names.length; i++) {
                newProps[names[i]] = undefined;
        }

        this.setProps(newProps);
},

setProps: function(newProps) {
        var changedProps = {};
        var changedCnt = 0;
        var name, val;

        for (name in newProps) {
                val = newProps[name];

                // a change in value?
                // if an object, don't check equality, because might have been mutated internally.
                // TODO: eventually enforce immutability.
                if (
                        typeof val === 'object' ||
                        val !== this._props[name]
                ) {
                        changedProps[name] = val;
                        changedCnt++;
                }
        }

        if (changedCnt) {

                this.trigger('before:batchChange', changedProps);

                for (name in changedProps) {
                        val = changedProps[name];

                        this.trigger('before:change', name, val);
                        this.trigger('before:change:' + name, val);
                }

                for (name in changedProps) {
                        val = changedProps[name];

                        if (val === undefined) {
                                delete this._props[name];
                        }
                        else {
                                this._props[name] = val;
                        }

                        this.trigger('change:' + name, val);
                        this.trigger('change', name, val);
                }

                this.trigger('batchChange', changedProps);
        }
},

watch: function(name, depList, startFunc, stopFunc) {
        var _this = this;

        this.unwatch(name);

        this._watchers[name] = this._watchDeps(depList, function(deps) {
                var res = startFunc.call(_this, deps);

                if (res && res.then) {
                        _this.unset(name); // put in an unset state while resolving
                        res.then(function(val) {
                                _this.set(name, val);
                        });
                }
                else {
                        _this.set(name, res);
                }
        }, function() {
                _this.unset(name);

                if (stopFunc) {
                        stopFunc.call(_this);
                }
        });
},

unwatch: function(name) {
        var watcher = this._watchers[name];

        if (watcher) {
                delete this._watchers[name];
                watcher.teardown();
        }
},

_watchDeps: function(depList, startFunc, stopFunc) {
        var _this = this;
        var queuedChangeCnt = 0;
        var depCnt = depList.length;
        var satisfyCnt = 0;
        var values = {}; // what's passed as the `deps` arguments
        var bindTuples = []; // array of [ eventName, handlerFunc ] arrays
        var isCallingStop = false;

        function onBeforeDepChange(depName, val, isOptional) {
                queuedChangeCnt++;
                if (queuedChangeCnt === 1) { // first change to cause a "stop" ?
                        if (satisfyCnt === depCnt) { // all deps previously satisfied?
                                isCallingStop = true;
                                stopFunc();
                                isCallingStop = false;
                        }
                }
        }

        function onDepChange(depName, val, isOptional) {

                if (val === undefined) { // unsetting a value?

                        // required dependency that was previously set?
                        if (!isOptional && values[depName] !== undefined) {
                                satisfyCnt--;
                        }

                        delete values[depName];
                }
                else { // setting a value?

                        // required dependency that was previously unset?
                        if (!isOptional && values[depName] === undefined) {
                                satisfyCnt++;
                        }

                        values[depName] = val;
                }

                queuedChangeCnt--;
                if (!queuedChangeCnt) { // last change to cause a "start"?

                        // now finally satisfied or satisfied all along?
                        if (satisfyCnt === depCnt) {

                                // if the stopFunc initiated another value change, ignore it.
                                // it will be processed by another change event anyway.
                                if (!isCallingStop) {
                                        startFunc(values);
                                }
                        }
                }
        }

        // intercept for .on() that remembers handlers
        function bind(eventName, handler) {
                _this.on(eventName, handler);
                bindTuples.push([ eventName, handler ]);
        }

        // listen to dependency changes
        depList.forEach(function(depName) {
                var isOptional = false;

                if (depName.charAt(0) === '?') { // TODO: more DRY
                        depName = depName.substring(1);
                        isOptional = true;
                }

                bind('before:change:' + depName, function(val) {
                        onBeforeDepChange(depName, val, isOptional);
                });

                bind('change:' + depName, function(val) {
                        onDepChange(depName, val, isOptional);
                });
        });

        // process current dependency values
        depList.forEach(function(depName) {
                var isOptional = false;

                if (depName.charAt(0) === '?') { // TODO: more DRY
                        depName = depName.substring(1);
                        isOptional = true;
                }

                if (_this.has(depName)) {
                        values[depName] = _this.get(depName);
                        satisfyCnt++;
                }
                else if (isOptional) {
                        satisfyCnt++;
                }
        });

        // initially satisfied
        if (satisfyCnt === depCnt) {
                startFunc(values);
        }

        return {
                teardown: function() {
                        // remove all handlers
                        for (var i = 0; i < bindTuples.length; i++) {
                                _this.off(bindTuples[i][0], bindTuples[i][1]);
                        }
                        bindTuples = null;

                        // was satisfied, so call stopFunc
                        if (satisfyCnt === depCnt) {
                                stopFunc();
                        }
                },
                flash: function() {
                        if (satisfyCnt === depCnt) {
                                stopFunc();
                                startFunc(values);
                        }
                }
        };
},

flash: function(name) {
        var watcher = this._watchers[name];

        if (watcher) {
                watcher.flash();
        }
}

});

Model.watch = function(/* same arguments as this.watch() */) {

var proto = this.prototype;

if (!proto._globalWatchArgs) {
        proto._globalWatchArgs = [];
}

proto._globalWatchArgs.push(arguments);

};

FC.Model = Model;

;;

var Promise = {

construct: function(executor) {
        var deferred = $.Deferred();
        var promise = deferred.promise();

        if (typeof executor === 'function') {
                executor(
                        function(val) { // resolve
                                deferred.resolve(val);
                                attachImmediatelyResolvingThen(promise, val);
                        },
                        function() { // reject
                                deferred.reject();
                                attachImmediatelyRejectingThen(promise);
                        }
                );
        }

        return promise;
},

resolve: function(val) {
        var deferred = $.Deferred().resolve(val);
        var promise = deferred.promise();

        attachImmediatelyResolvingThen(promise, val);

        return promise;
},

reject: function() {
        var deferred = $.Deferred().reject();
        var promise = deferred.promise();

        attachImmediatelyRejectingThen(promise);

        return promise;
}

};

function attachImmediatelyResolvingThen(promise, val) {

promise.then = function(onResolve) {
        if (typeof onResolve === 'function') {
                return Promise.resolve(onResolve(val));
        }
        return promise;
};

}

function attachImmediatelyRejectingThen(promise) {

promise.then = function(onResolve, onReject) {
        if (typeof onReject === 'function') {
                onReject();
        }
        return promise;
};

}

FC.Promise = Promise;

;;

var TaskQueue = Class.extend(EmitterMixin, {

q: null,
isPaused: false,
isRunning: false,

constructor: function() {
        this.q = [];
},

queue: function(/* taskFunc, taskFunc... */) {
        this.q.push.apply(this.q, arguments); // append
        this.tryStart();
},

pause: function() {
        this.isPaused = true;
},

resume: function() {
        this.isPaused = false;
        this.tryStart();
},

tryStart: function() {
        if (!this.isRunning && this.canRunNext()) {
                this.isRunning = true;
                this.trigger('start');
                this.runNext();
        }
},

canRunNext: function() {
        return !this.isPaused && this.q.length;
},

runNext: function() { // does not check canRunNext
        this.runTask(this.q.shift());
},

runTask: function(task) {
        this.runTaskFunc(task);
},

runTaskFunc: function(taskFunc) {
        var _this = this;
        var res = taskFunc();

        if (res && res.then) {
                res.then(done);
        }
        else {
                done();
        }

        function done() {
                if (_this.canRunNext()) {
                        _this.runNext();
                }
                else {
                        _this.isRunning = false;
                        _this.trigger('stop');
                }
        }
}

});

FC.TaskQueue = TaskQueue;

;;

var RenderQueue = TaskQueue.extend({

waitsByNamespace: null,
waitNamespace: null,
waitId: null,

constructor: function(waitsByNamespace) {
        TaskQueue.call(this); // super-constructor

        this.waitsByNamespace = waitsByNamespace || {};
},

queue: function(taskFunc, namespace, type) {
        var task = {
                func: taskFunc,
                namespace: namespace,
                type: type
        };
        var waitMs;

        if (namespace) {
                waitMs = this.waitsByNamespace[namespace];
        }

        if (this.waitNamespace) {
                if (namespace === this.waitNamespace && waitMs != null) {
                        this.delayWait(waitMs);
                }
                else {
                        this.clearWait();
                        this.tryStart();
                }
        }

        if (this.compoundTask(task)) { // appended to queue?

                if (!this.waitNamespace && waitMs != null) {
                        this.startWait(namespace, waitMs);
                }
                else {
                        this.tryStart();
                }
        }
},

startWait: function(namespace, waitMs) {
        this.waitNamespace = namespace;
        this.spawnWait(waitMs);
},

delayWait: function(waitMs) {
        clearTimeout(this.waitId);
        this.spawnWait(waitMs);
},

spawnWait: function(waitMs) {
        var _this = this;

        this.waitId = setTimeout(function() {
                _this.waitNamespace = null;
                _this.tryStart();
        }, waitMs);
},

clearWait: function() {
        if (this.waitNamespace) {
                clearTimeout(this.waitId);
                this.waitId = null;
                this.waitNamespace = null;
        }
},

canRunNext: function() {
        if (!TaskQueue.prototype.canRunNext.apply(this, arguments)) {
                return false;
        }

        // waiting for a certain namespace to stop receiving tasks?
        if (this.waitNamespace) {

                // if there was a different namespace task in the meantime,
                // that forces all previously-waiting tasks to suddenly execute.
                // TODO: find a way to do this in constant time.
                for (var q = this.q, i = 0; i < q.length; i++) {
                        if (q[i].namespace !== this.waitNamespace) {
                                return true; // allow execution
                        }
                }

                return false;
        }

        return true;
},

runTask: function(task) {
        this.runTaskFunc(task.func);
},

compoundTask: function(newTask) {
        var q = this.q;
        var shouldAppend = true;
        var i, task;

        if (newTask.namespace) {

                if (newTask.type === 'destroy' || newTask.type === 'init') {

                        // remove all add/remove ops with same namespace, regardless of order
                        for (i = q.length - 1; i >= 0; i--) {
                                task = q[i];

                                if (
                                        task.namespace === newTask.namespace &&
                                        (task.type === 'add' || task.type === 'remove')
                                ) {
                                        q.splice(i, 1); // remove task
                                }
                        }

                        if (newTask.type === 'destroy') {
                                // eat away final init/destroy operation
                                if (q.length) {
                                        task = q[q.length - 1]; // last task

                                        if (task.namespace === newTask.namespace) {

                                                // the init and our destroy cancel each other out
                                                if (task.type === 'init') {
                                                        shouldAppend = false;
                                                        q.pop();
                                                }
                                                // prefer to use the destroy operation that's already present
                                                else if (task.type === 'destroy') {
                                                        shouldAppend = false;
                                                }
                                        }
                                }
                        }
                        else if (newTask.type === 'init') {
                                // eat away final init operation
                                if (q.length) {
                                        task = q[q.length - 1]; // last task

                                        if (
                                                task.namespace === newTask.namespace &&
                                                task.type === 'init'
                                        ) {
                                                // our init operation takes precedence
                                                q.pop();
                                        }
                                }
                        }
                }
        }

        if (shouldAppend) {
                q.push(newTask);
        }

        return shouldAppend;
}

});

FC.RenderQueue = RenderQueue;

;;

/* A rectangular panel that is absolutely positioned over other content


Options:

- className (string)
- content (HTML string or jQuery element set)
- parentEl
- top
- left
- right (the x coord of where the right edge should be. not a "CSS" right)
- autoHide (boolean)
- show (callback)
- hide (callback)

*/

var Popover = Class.extend(ListenerMixin, {

isHidden: true,
options: null,
el: null, // the container element for the popover. generated by this object
margin: 10, // the space required between the popover and the edges of the scroll container

constructor: function(options) {
        this.options = options || {};
},

// Shows the popover on the specified position. Renders it if not already
show: function() {
        if (this.isHidden) {
                if (!this.el) {
                        this.render();
                }
                this.el.show();
                this.position();
                this.isHidden = false;
                this.trigger('show');
        }
},

// Hides the popover, through CSS, but does not remove it from the DOM
hide: function() {
        if (!this.isHidden) {
                this.el.hide();
                this.isHidden = true;
                this.trigger('hide');
        }
},

// Creates `this.el` and renders content inside of it
render: function() {
        var _this = this;
        var options = this.options;

        this.el = $('<div class="fc-popover"/>')
                .addClass(options.className || '')
                .css({
                        // position initially to the top left to avoid creating scrollbars
                        top: 0,
                        left: 0
                })
                .append(options.content)
                .appendTo(options.parentEl);

        // when a click happens on anything inside with a 'fc-close' className, hide the popover
        this.el.on('click', '.fc-close', function() {
                _this.hide();
        });

        if (options.autoHide) {
                this.listenTo($(document), 'mousedown', this.documentMousedown);
        }
},

// Triggered when the user clicks *anywhere* in the document, for the autoHide feature
documentMousedown: function(ev) {
        // only hide the popover if the click happened outside the popover
        if (this.el && !$(ev.target).closest(this.el).length) {
                this.hide();
        }
},

// Hides and unregisters any handlers
removeElement: function() {
        this.hide();

        if (this.el) {
                this.el.remove();
                this.el = null;
        }

        this.stopListeningTo($(document), 'mousedown');
},

// Positions the popover optimally, using the top/left/right options
position: function() {
        var options = this.options;
        var origin = this.el.offsetParent().offset();
        var width = this.el.outerWidth();
        var height = this.el.outerHeight();
        var windowEl = $(window);
        var viewportEl = getScrollParent(this.el);
        var viewportTop;
        var viewportLeft;
        var viewportOffset;
        var top; // the "position" (not "offset") values for the popover
        var left; //

        // compute top and left
        top = options.top || 0;
        if (options.left !== undefined) {
                left = options.left;
        }
        else if (options.right !== undefined) {
                left = options.right - width; // derive the left value from the right value
        }
        else {
                left = 0;
        }

        if (viewportEl.is(window) || viewportEl.is(document)) { // normalize getScrollParent's result
                viewportEl = windowEl;
                viewportTop = 0; // the window is always at the top left
                viewportLeft = 0; // (and .offset() won't work if called here)
        }
        else {
                viewportOffset = viewportEl.offset();
                viewportTop = viewportOffset.top;
                viewportLeft = viewportOffset.left;
        }

        // if the window is scrolled, it causes the visible area to be further down
        viewportTop += windowEl.scrollTop();
        viewportLeft += windowEl.scrollLeft();

        // constrain to the view port. if constrained by two edges, give precedence to top/left
        if (options.viewportConstrain !== false) {
                top = Math.min(top, viewportTop + viewportEl.outerHeight() - height - this.margin);
                top = Math.max(top, viewportTop + this.margin);
                left = Math.min(left, viewportLeft + viewportEl.outerWidth() - width - this.margin);
                left = Math.max(left, viewportLeft + this.margin);
        }

        this.el.css({
                top: top - origin.top,
                left: left - origin.left
        });
},

// Triggers a callback. Calls a function in the option hash of the same name.
// Arguments beyond the first `name` are forwarded on.
// TODO: better code reuse for this. Repeat code
trigger: function(name) {
        if (this.options[name]) {
                this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
        }
}

});

;;

/* A cache for the left/right/top/bottom/width/height values for one or more elements. Works with both offset (from topleft document) and position (from offsetParent).

options:

*/ var CoordCache = FC.CoordCache = Class.extend({

els: null, // jQuery set (assumed to be siblings)
forcedOffsetParentEl: null, // options can override the natural offsetParent
origin: null, // {left,top} position of offsetParent of els
boundingRect: null, // constrain cordinates to this rectangle. {left,right,top,bottom} or null
isHorizontal: false, // whether to query for left/right/width
isVertical: false, // whether to query for top/bottom/height

// arrays of coordinates (offsets from topleft of document)
lefts: null,
rights: null,
tops: null,
bottoms: null,

constructor: function(options) {
        this.els = $(options.els);
        this.isHorizontal = options.isHorizontal;
        this.isVertical = options.isVertical;
        this.forcedOffsetParentEl = options.offsetParent ? $(options.offsetParent) : null;
},

// Queries the els for coordinates and stores them.
// Call this method before using and of the get* methods below.
build: function() {
        var offsetParentEl = this.forcedOffsetParentEl;
        if (!offsetParentEl && this.els.length > 0) {
                offsetParentEl = this.els.eq(0).offsetParent();
        }

        this.origin = offsetParentEl ?
                offsetParentEl.offset() :
                null;

        this.boundingRect = this.queryBoundingRect();

        if (this.isHorizontal) {
                this.buildElHorizontals();
        }
        if (this.isVertical) {
                this.buildElVerticals();
        }
},

// Destroys all internal data about coordinates, freeing memory
clear: function() {
        this.origin = null;
        this.boundingRect = null;
        this.lefts = null;
        this.rights = null;
        this.tops = null;
        this.bottoms = null;
},

// When called, if coord caches aren't built, builds them
ensureBuilt: function() {
        if (!this.origin) {
                this.build();
        }
},

// Populates the left/right internal coordinate arrays
buildElHorizontals: function() {
        var lefts = [];
        var rights = [];

        this.els.each(function(i, node) {
                var el = $(node);
                var left = el.offset().left;
                var width = el.outerWidth();

                lefts.push(left);
                rights.push(left + width);
        });

        this.lefts = lefts;
        this.rights = rights;
},

// Populates the top/bottom internal coordinate arrays
buildElVerticals: function() {
        var tops = [];
        var bottoms = [];

        this.els.each(function(i, node) {
                var el = $(node);
                var top = el.offset().top;
                var height = el.outerHeight();

                tops.push(top);
                bottoms.push(top + height);
        });

        this.tops = tops;
        this.bottoms = bottoms;
},

// Given a left offset (from document left), returns the index of the el that it horizontally intersects.
// If no intersection is made, returns undefined.
getHorizontalIndex: function(leftOffset) {
        this.ensureBuilt();

        var lefts = this.lefts;
        var rights = this.rights;
        var len = lefts.length;
        var i;

        for (i = 0; i < len; i++) {
                if (leftOffset >= lefts[i] && leftOffset < rights[i]) {
                        return i;
                }
        }
},

// Given a top offset (from document top), returns the index of the el that it vertically intersects.
// If no intersection is made, returns undefined.
getVerticalIndex: function(topOffset) {
        this.ensureBuilt();

        var tops = this.tops;
        var bottoms = this.bottoms;
        var len = tops.length;
        var i;

        for (i = 0; i < len; i++) {
                if (topOffset >= tops[i] && topOffset < bottoms[i]) {
                        return i;
                }
        }
},

// Gets the left offset (from document left) of the element at the given index
getLeftOffset: function(leftIndex) {
        this.ensureBuilt();
        return this.lefts[leftIndex];
},

// Gets the left position (from offsetParent left) of the element at the given index
getLeftPosition: function(leftIndex) {
        this.ensureBuilt();
        return this.lefts[leftIndex] - this.origin.left;
},

// Gets the right offset (from document left) of the element at the given index.
// This value is NOT relative to the document's right edge, like the CSS concept of "right" would be.
getRightOffset: function(leftIndex) {
        this.ensureBuilt();
        return this.rights[leftIndex];
},

// Gets the right position (from offsetParent left) of the element at the given index.
// This value is NOT relative to the offsetParent's right edge, like the CSS concept of "right" would be.
getRightPosition: function(leftIndex) {
        this.ensureBuilt();
        return this.rights[leftIndex] - this.origin.left;
},

// Gets the width of the element at the given index
getWidth: function(leftIndex) {
        this.ensureBuilt();
        return this.rights[leftIndex] - this.lefts[leftIndex];
},

// Gets the top offset (from document top) of the element at the given index
getTopOffset: function(topIndex) {
        this.ensureBuilt();
        return this.tops[topIndex];
},

// Gets the top position (from offsetParent top) of the element at the given position
getTopPosition: function(topIndex) {
        this.ensureBuilt();
        return this.tops[topIndex] - this.origin.top;
},

// Gets the bottom offset (from the document top) of the element at the given index.
// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
getBottomOffset: function(topIndex) {
        this.ensureBuilt();
        return this.bottoms[topIndex];
},

// Gets the bottom position (from the offsetParent top) of the element at the given index.
// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
getBottomPosition: function(topIndex) {
        this.ensureBuilt();
        return this.bottoms[topIndex] - this.origin.top;
},

// Gets the height of the element at the given index
getHeight: function(topIndex) {
        this.ensureBuilt();
        return this.bottoms[topIndex] - this.tops[topIndex];
},

// Bounding Rect
// TODO: decouple this from CoordCache

// Compute and return what the elements' bounding rectangle is, from the user's perspective.
// Right now, only returns a rectangle if constrained by an overflow:scroll element.
// Returns null if there are no elements
queryBoundingRect: function() {
        var scrollParentEl;

        if (this.els.length > 0) {
                scrollParentEl = getScrollParent(this.els.eq(0));

                if (!scrollParentEl.is(document)) {
                        return getClientRect(scrollParentEl);
                }
        }

        return null;
},

isPointInBounds: function(leftOffset, topOffset) {
        return this.isLeftInBounds(leftOffset) && this.isTopInBounds(topOffset);
},

isLeftInBounds: function(leftOffset) {
        return !this.boundingRect || (leftOffset >= this.boundingRect.left && leftOffset < this.boundingRect.right);
},

isTopInBounds: function(topOffset) {
        return !this.boundingRect || (topOffset >= this.boundingRect.top && topOffset < this.boundingRect.bottom);
}

});

;;

/* Tracks a drag's mouse movement, firing various handlers ———————————————————————————————————————-*/ // TODO: use Emitter

var DragListener = FC.DragListener = Class.extend(ListenerMixin, {

options: null,
subjectEl: null,

// coordinates of the initial mousedown
originX: null,
originY: null,

// the wrapping element that scrolls, or MIGHT scroll if there's overflow.
// TODO: do this for wrappers that have overflow:hidden as well.
scrollEl: null,

isInteracting: false,
isDistanceSurpassed: false,
isDelayEnded: false,
isDragging: false,
isTouch: false,
isGeneric: false, // initiated by 'dragstart' (jqui)

delay: null,
delayTimeoutId: null,
minDistance: null,

shouldCancelTouchScroll: true,
scrollAlwaysKills: false,

constructor: function(options) {
        this.options = options || {};
},

// Interaction (high-level)
// -----------------------------------------------------------------------------------------------------------------

startInteraction: function(ev, extraOptions) {

        if (ev.type === 'mousedown') {
                if (GlobalEmitter.get().shouldIgnoreMouse()) {
                        return;
                }
                else if (!isPrimaryMouseButton(ev)) {
                        return;
                }
                else {
                        ev.preventDefault(); // prevents native selection in most browsers
                }
        }

        if (!this.isInteracting) {

                // process options
                extraOptions = extraOptions || {};
                this.delay = firstDefined(extraOptions.delay, this.options.delay, 0);
                this.minDistance = firstDefined(extraOptions.distance, this.options.distance, 0);
                this.subjectEl = this.options.subjectEl;

                preventSelection($('body'));

                this.isInteracting = true;
                this.isTouch = getEvIsTouch(ev);
                this.isGeneric = ev.type === 'dragstart';
                this.isDelayEnded = false;
                this.isDistanceSurpassed = false;

                this.originX = getEvX(ev);
                this.originY = getEvY(ev);
                this.scrollEl = getScrollParent($(ev.target));

                this.bindHandlers();
                this.initAutoScroll();
                this.handleInteractionStart(ev);
                this.startDelay(ev);

                if (!this.minDistance) {
                        this.handleDistanceSurpassed(ev);
                }
        }
},

handleInteractionStart: function(ev) {
        this.trigger('interactionStart', ev);
},

endInteraction: function(ev, isCancelled) {
        if (this.isInteracting) {
                this.endDrag(ev);

                if (this.delayTimeoutId) {
                        clearTimeout(this.delayTimeoutId);
                        this.delayTimeoutId = null;
                }

                this.destroyAutoScroll();
                this.unbindHandlers();

                this.isInteracting = false;
                this.handleInteractionEnd(ev, isCancelled);

                allowSelection($('body'));
        }
},

handleInteractionEnd: function(ev, isCancelled) {
        this.trigger('interactionEnd', ev, isCancelled || false);
},

// Binding To DOM
// -----------------------------------------------------------------------------------------------------------------

bindHandlers: function() {
        // some browsers (Safari in iOS 10) don't allow preventDefault on touch events that are bound after touchstart,
        // so listen to the GlobalEmitter singleton, which is always bound, instead of the document directly.
        var globalEmitter = GlobalEmitter.get();

        if (this.isGeneric) {
                this.listenTo($(document), { // might only work on iOS because of GlobalEmitter's bind :(
                        drag: this.handleMove,
                        dragstop: this.endInteraction
                });
        }
        else if (this.isTouch) {
                this.listenTo(globalEmitter, {
                        touchmove: this.handleTouchMove,
                        touchend: this.endInteraction,
                        scroll: this.handleTouchScroll
                });
        }
        else {
                this.listenTo(globalEmitter, {
                        mousemove: this.handleMouseMove,
                        mouseup: this.endInteraction
                });
        }

        this.listenTo(globalEmitter, {
                selectstart: preventDefault, // don't allow selection while dragging
                contextmenu: preventDefault // long taps would open menu on Chrome dev tools
        });
},

unbindHandlers: function() {
        this.stopListeningTo(GlobalEmitter.get());
        this.stopListeningTo($(document)); // for isGeneric
},

// Drag (high-level)
// -----------------------------------------------------------------------------------------------------------------

// extraOptions ignored if drag already started
startDrag: function(ev, extraOptions) {
        this.startInteraction(ev, extraOptions); // ensure interaction began

        if (!this.isDragging) {
                this.isDragging = true;
                this.handleDragStart(ev);
        }
},

handleDragStart: function(ev) {
        this.trigger('dragStart', ev);
},

handleMove: function(ev) {
        var dx = getEvX(ev) - this.originX;
        var dy = getEvY(ev) - this.originY;
        var minDistance = this.minDistance;
        var distanceSq; // current distance from the origin, squared

        if (!this.isDistanceSurpassed) {
                distanceSq = dx * dx + dy * dy;
                if (distanceSq >= minDistance * minDistance) { // use pythagorean theorem
                        this.handleDistanceSurpassed(ev);
                }
        }

        if (this.isDragging) {
                this.handleDrag(dx, dy, ev);
        }
},

// Called while the mouse is being moved and when we know a legitimate drag is taking place
handleDrag: function(dx, dy, ev) {
        this.trigger('drag', dx, dy, ev);
        this.updateAutoScroll(ev); // will possibly cause scrolling
},

endDrag: function(ev) {
        if (this.isDragging) {
                this.isDragging = false;
                this.handleDragEnd(ev);
        }
},

handleDragEnd: function(ev) {
        this.trigger('dragEnd', ev);
},

// Delay
// -----------------------------------------------------------------------------------------------------------------

startDelay: function(initialEv) {
        var _this = this;

        if (this.delay) {
                this.delayTimeoutId = setTimeout(function() {
                        _this.handleDelayEnd(initialEv);
                }, this.delay);
        }
        else {
                this.handleDelayEnd(initialEv);
        }
},

handleDelayEnd: function(initialEv) {
        this.isDelayEnded = true;

        if (this.isDistanceSurpassed) {
                this.startDrag(initialEv);
        }
},

// Distance
// -----------------------------------------------------------------------------------------------------------------

handleDistanceSurpassed: function(ev) {
        this.isDistanceSurpassed = true;

        if (this.isDelayEnded) {
                this.startDrag(ev);
        }
},

// Mouse / Touch
// -----------------------------------------------------------------------------------------------------------------

handleTouchMove: function(ev) {

        // prevent inertia and touchmove-scrolling while dragging
        if (this.isDragging && this.shouldCancelTouchScroll) {
                ev.preventDefault();
        }

        this.handleMove(ev);
},

handleMouseMove: function(ev) {
        this.handleMove(ev);
},

// Scrolling (unrelated to auto-scroll)
// -----------------------------------------------------------------------------------------------------------------

handleTouchScroll: function(ev) {
        // if the drag is being initiated by touch, but a scroll happens before
        // the drag-initiating delay is over, cancel the drag
        if (!this.isDragging || this.scrollAlwaysKills) {
                this.endInteraction(ev, true); // isCancelled=true
        }
},

// Utils
// -----------------------------------------------------------------------------------------------------------------

// Triggers a callback. Calls a function in the option hash of the same name.
// Arguments beyond the first `name` are forwarded on.
trigger: function(name) {
        if (this.options[name]) {
                this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
        }
        // makes _methods callable by event name. TODO: kill this
        if (this['_' + name]) {
                this['_' + name].apply(this, Array.prototype.slice.call(arguments, 1));
        }
}

});

;; /* this.scrollEl is set in DragListener */ DragListener.mixin({

isAutoScroll: false,

scrollBounds: null, // { top, bottom, left, right }
scrollTopVel: null, // pixels per second
scrollLeftVel: null, // pixels per second
scrollIntervalId: null, // ID of setTimeout for scrolling animation loop

// defaults
scrollSensitivity: 30, // pixels from edge for scrolling to start
scrollSpeed: 200, // pixels per second, at maximum speed
scrollIntervalMs: 50, // millisecond wait between scroll increment

initAutoScroll: function() {
        var scrollEl = this.scrollEl;

        this.isAutoScroll =
                this.options.scroll &&
                scrollEl &&
                !scrollEl.is(window) &&
                !scrollEl.is(document);

        if (this.isAutoScroll) {
                // debounce makes sure rapid calls don't happen
                this.listenTo(scrollEl, 'scroll', debounce(this.handleDebouncedScroll, 100));
        }
},

destroyAutoScroll: function() {
        this.endAutoScroll(); // kill any animation loop

        // remove the scroll handler if there is a scrollEl
        if (this.isAutoScroll) {
                this.stopListeningTo(this.scrollEl, 'scroll'); // will probably get removed by unbindHandlers too :(
        }
},

// Computes and stores the bounding rectangle of scrollEl
computeScrollBounds: function() {
        if (this.isAutoScroll) {
                this.scrollBounds = getOuterRect(this.scrollEl);
                // TODO: use getClientRect in future. but prevents auto scrolling when on top of scrollbars
        }
},

// Called when the dragging is in progress and scrolling should be updated
updateAutoScroll: function(ev) {
        var sensitivity = this.scrollSensitivity;
        var bounds = this.scrollBounds;
        var topCloseness, bottomCloseness;
        var leftCloseness, rightCloseness;
        var topVel = 0;
        var leftVel = 0;

        if (bounds) { // only scroll if scrollEl exists

                // compute closeness to edges. valid range is from 0.0 - 1.0
                topCloseness = (sensitivity - (getEvY(ev) - bounds.top)) / sensitivity;
                bottomCloseness = (sensitivity - (bounds.bottom - getEvY(ev))) / sensitivity;
                leftCloseness = (sensitivity - (getEvX(ev) - bounds.left)) / sensitivity;
                rightCloseness = (sensitivity - (bounds.right - getEvX(ev))) / sensitivity;

                // translate vertical closeness into velocity.
                // mouse must be completely in bounds for velocity to happen.
                if (topCloseness >= 0 && topCloseness <= 1) {
                        topVel = topCloseness * this.scrollSpeed * -1; // negative. for scrolling up
                }
                else if (bottomCloseness >= 0 && bottomCloseness <= 1) {
                        topVel = bottomCloseness * this.scrollSpeed;
                }

                // translate horizontal closeness into velocity
                if (leftCloseness >= 0 && leftCloseness <= 1) {
                        leftVel = leftCloseness * this.scrollSpeed * -1; // negative. for scrolling left
                }
                else if (rightCloseness >= 0 && rightCloseness <= 1) {
                        leftVel = rightCloseness * this.scrollSpeed;
                }
        }

        this.setScrollVel(topVel, leftVel);
},

// Sets the speed-of-scrolling for the scrollEl
setScrollVel: function(topVel, leftVel) {

        this.scrollTopVel = topVel;
        this.scrollLeftVel = leftVel;

        this.constrainScrollVel(); // massages into realistic values

        // if there is non-zero velocity, and an animation loop hasn't already started, then START
        if ((this.scrollTopVel || this.scrollLeftVel) && !this.scrollIntervalId) {
                this.scrollIntervalId = setInterval(
                        proxy(this, 'scrollIntervalFunc'), // scope to `this`
                        this.scrollIntervalMs
                );
        }
},

// Forces scrollTopVel and scrollLeftVel to be zero if scrolling has already gone all the way
constrainScrollVel: function() {
        var el = this.scrollEl;

        if (this.scrollTopVel < 0) { // scrolling up?
                if (el.scrollTop() <= 0) { // already scrolled all the way up?
                        this.scrollTopVel = 0;
                }
        }
        else if (this.scrollTopVel > 0) { // scrolling down?
                if (el.scrollTop() + el[0].clientHeight >= el[0].scrollHeight) { // already scrolled all the way down?
                        this.scrollTopVel = 0;
                }
        }

        if (this.scrollLeftVel < 0) { // scrolling left?
                if (el.scrollLeft() <= 0) { // already scrolled all the left?
                        this.scrollLeftVel = 0;
                }
        }
        else if (this.scrollLeftVel > 0) { // scrolling right?
                if (el.scrollLeft() + el[0].clientWidth >= el[0].scrollWidth) { // already scrolled all the way right?
                        this.scrollLeftVel = 0;
                }
        }
},

// This function gets called during every iteration of the scrolling animation loop
scrollIntervalFunc: function() {
        var el = this.scrollEl;
        var frac = this.scrollIntervalMs / 1000; // considering animation frequency, what the vel should be mult'd by

        // change the value of scrollEl's scroll
        if (this.scrollTopVel) {
                el.scrollTop(el.scrollTop() + this.scrollTopVel * frac);
        }
        if (this.scrollLeftVel) {
                el.scrollLeft(el.scrollLeft() + this.scrollLeftVel * frac);
        }

        this.constrainScrollVel(); // since the scroll values changed, recompute the velocities

        // if scrolled all the way, which causes the vels to be zero, stop the animation loop
        if (!this.scrollTopVel && !this.scrollLeftVel) {
                this.endAutoScroll();
        }
},

// Kills any existing scrolling animation loop
endAutoScroll: function() {
        if (this.scrollIntervalId) {
                clearInterval(this.scrollIntervalId);
                this.scrollIntervalId = null;

                this.handleScrollEnd();
        }
},

// Get called when the scrollEl is scrolled (NOTE: this is delayed via debounce)
handleDebouncedScroll: function() {
        // recompute all coordinates, but *only* if this is *not* part of our scrolling animation
        if (!this.scrollIntervalId) {
                this.handleScrollEnd();
        }
},

// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
handleScrollEnd: function() {
}

}); ;;

/* Tracks mouse movements over a component and raises events about which hit the mouse is over.


options:

*/

var HitDragListener = DragListener.extend({

component: null, // converts coordinates to hits
        // methods: hitsNeeded, hitsNotNeeded, queryHit

origHit: null, // the hit the mouse was over when listening started
hit: null, // the hit the mouse is over
coordAdjust: null, // delta that will be added to the mouse coordinates when computing collisions

constructor: function(component, options) {
        DragListener.call(this, options); // call the super-constructor

        this.component = component;
},

// Called when drag listening starts (but a real drag has not necessarily began).
// ev might be undefined if dragging was started manually.
handleInteractionStart: function(ev) {
        var subjectEl = this.subjectEl;
        var subjectRect;
        var origPoint;
        var point;

        this.component.hitsNeeded();
        this.computeScrollBounds(); // for autoscroll

        if (ev) {
                origPoint = { left: getEvX(ev), top: getEvY(ev) };
                point = origPoint;

                // constrain the point to bounds of the element being dragged
                if (subjectEl) {
                        subjectRect = getOuterRect(subjectEl); // used for centering as well
                        point = constrainPoint(point, subjectRect);
                }

                this.origHit = this.queryHit(point.left, point.top);

                // treat the center of the subject as the collision point?
                if (subjectEl && this.options.subjectCenter) {

                        // only consider the area the subject overlaps the hit. best for large subjects.
                        // TODO: skip this if hit didn't supply left/right/top/bottom
                        if (this.origHit) {
                                subjectRect = intersectRects(this.origHit, subjectRect) ||
                                        subjectRect; // in case there is no intersection
                        }

                        point = getRectCenter(subjectRect);
                }

                this.coordAdjust = diffPoints(point, origPoint); // point - origPoint
        }
        else {
                this.origHit = null;
                this.coordAdjust = null;
        }

        // call the super-method. do it after origHit has been computed
        DragListener.prototype.handleInteractionStart.apply(this, arguments);
},

// Called when the actual drag has started
handleDragStart: function(ev) {
        var hit;

        DragListener.prototype.handleDragStart.apply(this, arguments); // call the super-method

        // might be different from this.origHit if the min-distance is large
        hit = this.queryHit(getEvX(ev), getEvY(ev));

        // report the initial hit the mouse is over
        // especially important if no min-distance and drag starts immediately
        if (hit) {
                this.handleHitOver(hit);
        }
},

// Called when the drag moves
handleDrag: function(dx, dy, ev) {
        var hit;

        DragListener.prototype.handleDrag.apply(this, arguments); // call the super-method

        hit = this.queryHit(getEvX(ev), getEvY(ev));

        if (!isHitsEqual(hit, this.hit)) { // a different hit than before?
                if (this.hit) {
                        this.handleHitOut();
                }
                if (hit) {
                        this.handleHitOver(hit);
                }
        }
},

// Called when dragging has been stopped
handleDragEnd: function() {
        this.handleHitDone();
        DragListener.prototype.handleDragEnd.apply(this, arguments); // call the super-method
},

// Called when a the mouse has just moved over a new hit
handleHitOver: function(hit) {
        var isOrig = isHitsEqual(hit, this.origHit);

        this.hit = hit;

        this.trigger('hitOver', this.hit, isOrig, this.origHit);
},

// Called when the mouse has just moved out of a hit
handleHitOut: function() {
        if (this.hit) {
                this.trigger('hitOut', this.hit);
                this.handleHitDone();
                this.hit = null;
        }
},

// Called after a hitOut. Also called before a dragStop
handleHitDone: function() {
        if (this.hit) {
                this.trigger('hitDone', this.hit);
        }
},

// Called when the interaction ends, whether there was a real drag or not
handleInteractionEnd: function() {
        DragListener.prototype.handleInteractionEnd.apply(this, arguments); // call the super-method

        this.origHit = null;
        this.hit = null;

        this.component.hitsNotNeeded();
},

// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
handleScrollEnd: function() {
        DragListener.prototype.handleScrollEnd.apply(this, arguments); // call the super-method

        // hits' absolute positions will be in new places after a user's scroll.
        // HACK for recomputing.
        if (this.isDragging) {
                this.component.releaseHits();
                this.component.prepareHits();
        }
},

// Gets the hit underneath the coordinates for the given mouse event
queryHit: function(left, top) {

        if (this.coordAdjust) {
                left += this.coordAdjust.left;
                top += this.coordAdjust.top;
        }

        return this.component.queryHit(left, top);
}

});

// Returns `true` if the hits are identically equal. `false` otherwise. Must be from the same component. // Two null values will be considered equal, as two “out of the component” states are the same. function isHitsEqual(hit0, hit1) {

if (!hit0 && !hit1) {
        return true;
}

if (hit0 && hit1) {
        return hit0.component === hit1.component &&
                isHitPropsWithin(hit0, hit1) &&
                isHitPropsWithin(hit1, hit0); // ensures all props are identical
}

return false;

}

// Returns true if all of subHit's non-standard properties are within superHit function isHitPropsWithin(subHit, superHit) {

for (var propName in subHit) {
        if (!/^(component|left|right|top|bottom)$/.test(propName)) {
                if (subHit[propName] !== superHit[propName]) {
                        return false;
                }
        }
}
return true;

}

;;

/* Listens to document and window-level user-interaction events, like touch events and mouse events, and fires these events as-is to whoever is observing a GlobalEmitter. Best when used as a singleton via GlobalEmitter.get()

Normalizes mouse/touch events. For examples:

*/

FC.touchMouseIgnoreWait = 500;

var GlobalEmitter = Class.extend(ListenerMixin, EmitterMixin, {

isTouching: false,
mouseIgnoreDepth: 0,
handleScrollProxy: null,

bind: function() {
        var _this = this;

        this.listenTo($(document), {
                touchstart: this.handleTouchStart,
                touchcancel: this.handleTouchCancel,
                touchend: this.handleTouchEnd,
                mousedown: this.handleMouseDown,
                mousemove: this.handleMouseMove,
                mouseup: this.handleMouseUp,
                click: this.handleClick,
                selectstart: this.handleSelectStart,
                contextmenu: this.handleContextMenu
        });

        // because we need to call preventDefault
        // because https://www.chromestatus.com/features/5093566007214080
        // TODO: investigate performance because this is a global handler
        window.addEventListener(
                'touchmove',
                this.handleTouchMoveProxy = function(ev) {
                        _this.handleTouchMove($.Event(ev));
                },
                { passive: false } // allows preventDefault()
        );

        // attach a handler to get called when ANY scroll action happens on the page.
        // this was impossible to do with normal on/off because 'scroll' doesn't bubble.
        // http://stackoverflow.com/a/32954565/96342
        window.addEventListener(
                'scroll',
                this.handleScrollProxy = function(ev) {
                        _this.handleScroll($.Event(ev));
                },
                true // useCapture
        );
},

unbind: function() {
        this.stopListeningTo($(document));

        window.removeEventListener(
                'touchmove',
                this.handleTouchMoveProxy
        );

        window.removeEventListener(
                'scroll',
                this.handleScrollProxy,
                true // useCapture
        );
},

// Touch Handlers
// -----------------------------------------------------------------------------------------------------------------

handleTouchStart: function(ev) {

        // if a previous touch interaction never ended with a touchend, then implicitly end it,
        // but since a new touch interaction is about to begin, don't start the mouse ignore period.
        this.stopTouch(ev, true); // skipMouseIgnore=true

        this.isTouching = true;
        this.trigger('touchstart', ev);
},

handleTouchMove: function(ev) {
        if (this.isTouching) {
                this.trigger('touchmove', ev);
        }
},

handleTouchCancel: function(ev) {
        if (this.isTouching) {
                this.trigger('touchcancel', ev);

                // Have touchcancel fire an artificial touchend. That way, handlers won't need to listen to both.
                // If touchend fires later, it won't have any effect b/c isTouching will be false.
                this.stopTouch(ev);
        }
},

handleTouchEnd: function(ev) {
        this.stopTouch(ev);
},

// Mouse Handlers
// -----------------------------------------------------------------------------------------------------------------

handleMouseDown: function(ev) {
        if (!this.shouldIgnoreMouse()) {
                this.trigger('mousedown', ev);
        }
},

handleMouseMove: function(ev) {
        if (!this.shouldIgnoreMouse()) {
                this.trigger('mousemove', ev);
        }
},

handleMouseUp: function(ev) {
        if (!this.shouldIgnoreMouse()) {
                this.trigger('mouseup', ev);
        }
},

handleClick: function(ev) {
        if (!this.shouldIgnoreMouse()) {
                this.trigger('click', ev);
        }
},

// Misc Handlers
// -----------------------------------------------------------------------------------------------------------------

handleSelectStart: function(ev) {
        this.trigger('selectstart', ev);
},

handleContextMenu: function(ev) {
        this.trigger('contextmenu', ev);
},

handleScroll: function(ev) {
        this.trigger('scroll', ev);
},

// Utils
// -----------------------------------------------------------------------------------------------------------------

stopTouch: function(ev, skipMouseIgnore) {
        if (this.isTouching) {
                this.isTouching = false;
                this.trigger('touchend', ev);

                if (!skipMouseIgnore) {
                        this.startTouchMouseIgnore();
                }
        }
},

startTouchMouseIgnore: function() {
        var _this = this;
        var wait = FC.touchMouseIgnoreWait;

        if (wait) {
                this.mouseIgnoreDepth++;
                setTimeout(function() {
                        _this.mouseIgnoreDepth--;
                }, wait);
        }
},

shouldIgnoreMouse: function() {
        return this.isTouching || Boolean(this.mouseIgnoreDepth);
}

});

// Singleton // ———————————————————————————————————————

(function() {

var globalEmitter = null;
var neededCount = 0;

// gets the singleton
GlobalEmitter.get = function() {

        if (!globalEmitter) {
                globalEmitter = new GlobalEmitter();
                globalEmitter.bind();
        }

        return globalEmitter;
};

// called when an object knows it will need a GlobalEmitter in the near future.
GlobalEmitter.needed = function() {
        GlobalEmitter.get(); // ensures globalEmitter
        neededCount++;
};

// called when the object that originally called needed() doesn't need a GlobalEmitter anymore.
GlobalEmitter.unneeded = function() {
        neededCount--;

        if (!neededCount) { // nobody else needs it
                globalEmitter.unbind();
                globalEmitter = null;
        }
};

})();

;;

/* Creates a clone of an element and lets it track the mouse as it moves ———————————————————————————————————————-*/

var MouseFollower = Class.extend(ListenerMixin, {

options: null,

sourceEl: null, // the element that will be cloned and made to look like it is dragging
el: null, // the clone of `sourceEl` that will track the mouse
parentEl: null, // the element that `el` (the clone) will be attached to

// the initial position of el, relative to the offset parent. made to match the initial offset of sourceEl
top0: null,
left0: null,

// the absolute coordinates of the initiating touch/mouse action
y0: null,
x0: null,

// the number of pixels the mouse has moved from its initial position
topDelta: null,
leftDelta: null,

isFollowing: false,
isHidden: false,
isAnimating: false, // doing the revert animation?

constructor: function(sourceEl, options) {
        this.options = options = options || {};
        this.sourceEl = sourceEl;
        this.parentEl = options.parentEl ? $(options.parentEl) : sourceEl.parent(); // default to sourceEl's parent
},

// Causes the element to start following the mouse
start: function(ev) {
        if (!this.isFollowing) {
                this.isFollowing = true;

                this.y0 = getEvY(ev);
                this.x0 = getEvX(ev);
                this.topDelta = 0;
                this.leftDelta = 0;

                if (!this.isHidden) {
                        this.updatePosition();
                }

                if (getEvIsTouch(ev)) {
                        this.listenTo($(document), 'touchmove', this.handleMove);
                }
                else {
                        this.listenTo($(document), 'mousemove', this.handleMove);
                }
        }
},

// Causes the element to stop following the mouse. If shouldRevert is true, will animate back to original position.
// `callback` gets invoked when the animation is complete. If no animation, it is invoked immediately.
stop: function(shouldRevert, callback) {
        var _this = this;
        var revertDuration = this.options.revertDuration;

        function complete() { // might be called by .animate(), which might change `this` context
                _this.isAnimating = false;
                _this.removeElement();

                _this.top0 = _this.left0 = null; // reset state for future updatePosition calls

                if (callback) {
                        callback();
                }
        }

        if (this.isFollowing && !this.isAnimating) { // disallow more than one stop animation at a time
                this.isFollowing = false;

                this.stopListeningTo($(document));

                if (shouldRevert && revertDuration && !this.isHidden) { // do a revert animation?
                        this.isAnimating = true;
                        this.el.animate({
                                top: this.top0,
                                left: this.left0
                        }, {
                                duration: revertDuration,
                                complete: complete
                        });
                }
                else {
                        complete();
                }
        }
},

// Gets the tracking element. Create it if necessary
getEl: function() {
        var el = this.el;

        if (!el) {
                el = this.el = this.sourceEl.clone()
                        .addClass(this.options.additionalClass || '')
                        .css({
                                position: 'absolute',
                                visibility: '', // in case original element was hidden (commonly through hideEvents())
                                display: this.isHidden ? 'none' : '', // for when initially hidden
                                margin: 0,
                                right: 'auto', // erase and set width instead
                                bottom: 'auto', // erase and set height instead
                                width: this.sourceEl.width(), // explicit height in case there was a 'right' value
                                height: this.sourceEl.height(), // explicit width in case there was a 'bottom' value
                                opacity: this.options.opacity || '',
                                zIndex: this.options.zIndex
                        });

                // we don't want long taps or any mouse interaction causing selection/menus.
                // would use preventSelection(), but that prevents selectstart, causing problems.
                el.addClass('fc-unselectable');

                el.appendTo(this.parentEl);
        }

        return el;
},

// Removes the tracking element if it has already been created
removeElement: function() {
        if (this.el) {
                this.el.remove();
                this.el = null;
        }
},

// Update the CSS position of the tracking element
updatePosition: function() {
        var sourceOffset;
        var origin;

        this.getEl(); // ensure this.el

        // make sure origin info was computed
        if (this.top0 === null) {
                sourceOffset = this.sourceEl.offset();
                origin = this.el.offsetParent().offset();
                this.top0 = sourceOffset.top - origin.top;
                this.left0 = sourceOffset.left - origin.left;
        }

        this.el.css({
                top: this.top0 + this.topDelta,
                left: this.left0 + this.leftDelta
        });
},

// Gets called when the user moves the mouse
handleMove: function(ev) {
        this.topDelta = getEvY(ev) - this.y0;
        this.leftDelta = getEvX(ev) - this.x0;

        if (!this.isHidden) {
                this.updatePosition();
        }
},

// Temporarily makes the tracking element invisible. Can be called before following starts
hide: function() {
        if (!this.isHidden) {
                this.isHidden = true;
                if (this.el) {
                        this.el.hide();
                }
        }
},

// Show the tracking element after it has been temporarily hidden
show: function() {
        if (this.isHidden) {
                this.isHidden = false;
                this.updatePosition();
                this.getEl().show();
        }
}

});

;;

var ChronoComponent = Model.extend({

children: null,

el: null, // the view's containing element. set by Calendar(?)

// frequently accessed options
isRTL: false,
nextDayThreshold: null,

constructor: function() {
        Model.call(this);

        this.children = [];

        this.nextDayThreshold = moment.duration(this.opt('nextDayThreshold'));
        this.isRTL = this.opt('isRTL');
},

addChild: function(chronoComponent) {
        this.children.push(chronoComponent);
},

// Options
// -----------------------------------------------------------------------------------------------------------------

opt: function(name) {
        // subclasses must implement
},

publiclyTrigger: function(/**/) {
        var calendar = this._getCalendar();

        return calendar.publiclyTrigger.apply(calendar, arguments);
},

hasPublicHandlers: function(/**/) {
        var calendar = this._getCalendar();

        return calendar.hasPublicHandlers.apply(calendar, arguments);
},

// Element
// -----------------------------------------------------------------------------------------------------------------

// Sets the container element that the view should render inside of, does global DOM-related initializations,
// and renders all the non-date-related content inside.
setElement: function(el) {
        this.el = el;
        this.bindGlobalHandlers();
        this.renderSkeleton();
},

// Removes the view's container element from the DOM, clearing any content beforehand.
// Undoes any other DOM-related attachments.
removeElement: function() {
        this.unrenderSkeleton();
        this.unbindGlobalHandlers();

        this.el.remove();
        // NOTE: don't null-out this.el in case the View was destroyed within an API callback.
        // We don't null-out the View's other jQuery element references upon destroy,
        //  so we shouldn't kill this.el either.
},

bindGlobalHandlers: function() {
},

unbindGlobalHandlers: function() {
},

// Skeleton
// -----------------------------------------------------------------------------------------------------------------

// Renders the basic structure of the view before any content is rendered
renderSkeleton: function() {
        // subclasses should implement
},

// Unrenders the basic structure of the view
unrenderSkeleton: function() {
        // subclasses should implement
},

// Date Low-level Rendering
// -----------------------------------------------------------------------------------------------------------------

// date-cell content only
renderDates: function() {
        // subclasses should implement
},

// date-cell content only
unrenderDates: function() {
        // subclasses should override
},

// Now-Indicator
// -----------------------------------------------------------------------------------------------------------------

// Returns a string unit, like 'second' or 'minute' that defined how often the current time indicator
// should be refreshed. If something falsy is returned, no time indicator is rendered at all.
getNowIndicatorUnit: function() {
        // subclasses should implement
},

// Renders a current time indicator at the given datetime
renderNowIndicator: function(date) {
        this.callChildren('renderNowIndicator', date);
},

// Undoes the rendering actions from renderNowIndicator
unrenderNowIndicator: function() {
        this.callChildren('unrenderNowIndicator');
},

// Business Hours
// ---------------------------------------------------------------------------------------------------------------

// Renders business-hours onto the view. Assumes updateSize has already been called.
renderBusinessHours: function() {
        this.callChildren('renderBusinessHours');
},

// Unrenders previously-rendered business-hours
unrenderBusinessHours: function() {
        this.callChildren('unrenderBusinessHours');
},

// Event Low-level Rendering
// -----------------------------------------------------------------------------------------------------------------

// Renders the events onto the view.
// TODO: eventually rename to `renderEvents` once legacy is gone.
renderEventsPayload: function(eventsPayload) {
        this.callChildren('renderEventsPayload', eventsPayload);
},

// Removes event elements from the view.
unrenderEvents: function() {
        this.callChildren('unrenderEvents');

        // we DON'T need to call updateHeight() because
        // a renderEventsPayload() call always happens after this, which will eventually call updateHeight()
},

// Retrieves all segment objects that are rendered in the view
getEventSegs: function() {
        var children = this.children;
        var segs = [];
        var i;

        for (i = 0; i < children.length; i++) {
                segs.push.apply( // append
                        segs,
                        children[i].getEventSegs()
                );
        }

        return segs;
},

// Drag-n-Drop Rendering (for both events and external elements)
// ---------------------------------------------------------------------------------------------------------------

// Renders a visual indication of a event or external-element drag over the given drop zone.
// If an external-element, seg will be `null`.
// Must return elements used for any mock events.
renderDrag: function(eventFootprints, seg) {
        var dragEls = null;
        var children = this.children;
        var i;
        var childDragEls;

        for (i = 0; i < children.length; i++) {
                childDragEls = children[i].renderDrag(eventFootprints, seg);

                if (childDragEls) {
                        if (!dragEls) {
                                dragEls = childDragEls;
                        }
                        else {
                                dragEls = dragEls.add(childDragEls);
                        }
                }
        }

        return dragEls;
},

// Unrenders a visual indication of an event or external-element being dragged.
unrenderDrag: function() {
        this.callChildren('unrenderDrag');
},

// Selection
// ---------------------------------------------------------------------------------------------------------------

// Renders a visual indication of the selection
// TODO: rename to `renderSelection` after legacy is gone
renderSelectionFootprint: function(componentFootprint) {
        this.callChildren('renderSelectionFootprint', componentFootprint);
},

// Unrenders a visual indication of selection
unrenderSelection: function() {
        this.callChildren('unrenderSelection');
},

// Hit Areas
// ---------------------------------------------------------------------------------------------------------------

hitsNeeded: function() {
        this.callChildren('hitsNeeded');
},

hitsNotNeeded: function() {
        this.callChildren('hitsNotNeeded');
},

// Called before one or more queryHit calls might happen. Should prepare any cached coordinates for queryHit
prepareHits: function() {
        this.callChildren('prepareHits');
},

// Called when queryHit calls have subsided. Good place to clear any coordinate caches.
releaseHits: function() {
        this.callChildren('releaseHits');
},

// Given coordinates from the topleft of the document, return data about the date-related area underneath.
// Can return an object with arbitrary properties (although top/right/left/bottom are encouraged).
// Must have a `grid` property, a reference to this current grid. TODO: avoid this
// The returned object will be processed by getHitFootprint and getHitEl.
queryHit: function(leftOffset, topOffset) {
        var children = this.children;
        var i;
        var hit;

        for (i = 0; i < children.length; i++) {
                hit = children[i].queryHit(leftOffset, topOffset);

                if (hit) {
                        break;
                }
        }

        return hit;
},

// Event Drag-n-Drop
// ---------------------------------------------------------------------------------------------------------------

// Computes if the given event is allowed to be dragged by the user
isEventDefDraggable: function(eventDef) {
        return this.isEventDefStartEditable(eventDef);
},

isEventDefStartEditable: function(eventDef) {
        var isEditable = eventDef.isStartExplicitlyEditable();

        if (isEditable == null) {
                isEditable = this.opt('eventStartEditable');

                if (isEditable == null) {
                        isEditable = this.isEventDefGenerallyEditable(eventDef);
                }
        }

        return isEditable;
},

isEventDefGenerallyEditable: function(eventDef) {
        var isEditable = eventDef.isExplicitlyEditable();

        if (isEditable == null) {
                isEditable = this.opt('editable');
        }

        return isEditable;
},

// Event Resizing
// ---------------------------------------------------------------------------------------------------------------

// Computes if the given event is allowed to be resized from its starting edge
isEventDefResizableFromStart: function(eventDef) {
        return this.opt('eventResizableFromStart') && this.isEventDefResizable(eventDef);
},

// Computes if the given event is allowed to be resized from its ending edge
isEventDefResizableFromEnd: function(eventDef) {
        return this.isEventDefResizable(eventDef);
},

// Computes if the given event is allowed to be resized by the user at all
isEventDefResizable: function(eventDef) {
        var isResizable = eventDef.isDurationExplicitlyEditable();

        if (isResizable == null) {
                isResizable = this.opt('eventDurationEditable');

                if (isResizable == null) {
                        isResizable = this.isEventDefGenerallyEditable(eventDef);
                }
        }
        return isResizable;
},

// Foreground Segment Rendering
// ---------------------------------------------------------------------------------------------------------------

// Renders foreground event segments onto the grid. May return a subset of segs that were rendered.
renderFgSegs: function(segs) {
        // subclasses must implement
},

// Unrenders all currently rendered foreground segments
unrenderFgSegs: function() {
        // subclasses must implement
},

// Renders and assigns an `el` property for each foreground event segment.
// Only returns segments that successfully rendered.
// A utility that subclasses may use.
renderFgSegEls: function(segs, disableResizing) {
        var _this = this;
        var hasEventRenderHandlers = this.hasPublicHandlers('eventRender');
        var html = '';
        var renderedSegs = [];
        var i;

        if (segs.length) { // don't build an empty html string

                // build a large concatenation of event segment HTML
                for (i = 0; i < segs.length; i++) {
                        html += this.fgSegHtml(segs[i], disableResizing);
                }

                // Grab individual elements from the combined HTML string. Use each as the default rendering.
                // Then, compute the 'el' for each segment. An el might be null if the eventRender callback returned false.
                $(html).each(function(i, node) {
                        var seg = segs[i];
                        var el = $(node);

                        if (hasEventRenderHandlers) { // optimization
                                el = _this.filterEventRenderEl(seg.footprint, el);
                        }

                        if (el) {
                                el.data('fc-seg', seg); // used by handlers
                                seg.el = el;
                                renderedSegs.push(seg);
                        }
                });
        }

        return renderedSegs;
},

// Generates the HTML for the default rendering of a foreground event segment. Used by renderFgSegEls()
fgSegHtml: function(seg, disableResizing) {
        // subclasses should implement
},

// Given an event and the default element used for rendering, returns the element that should actually be used.
// Basically runs events and elements through the eventRender hook.
filterEventRenderEl: function(eventFootprint, el) {
        var legacy = eventFootprint.getEventLegacy();

        var custom = this.publiclyTrigger('eventRender', {
                context: legacy,
                args: [ legacy, el, this._getView() ]
        });

        if (custom === false) { // means don't render at all
                el = null;
        }
        else if (custom && custom !== true) {
                el = $(custom);
        }

        return el;
},

// Navigation
// ----------------------------------------------------------------------------------------------------------------

// Generates HTML for an anchor to another view into the calendar.
// Will either generate an <a> tag or a non-clickable <span> tag, depending on enabled settings.
// `gotoOptions` can either be a moment input, or an object with the form:
// { date, type, forceOff }
// `type` is a view-type like "day" or "week". default value is "day".
// `attrs` and `innerHtml` are use to generate the rest of the HTML tag.
buildGotoAnchorHtml: function(gotoOptions, attrs, innerHtml) {
        var date, type, forceOff;
        var finalOptions;

        if ($.isPlainObject(gotoOptions)) {
                date = gotoOptions.date;
                type = gotoOptions.type;
                forceOff = gotoOptions.forceOff;
        }
        else {
                date = gotoOptions; // a single moment input
        }
        date = FC.moment(date); // if a string, parse it

        finalOptions = { // for serialization into the link
                date: date.format('YYYY-MM-DD'),
                type: type || 'day'
        };

        if (typeof attrs === 'string') {
                innerHtml = attrs;
                attrs = null;
        }

        attrs = attrs ? ' ' + attrsToStr(attrs) : ''; // will have a leading space
        innerHtml = innerHtml || '';

        if (!forceOff && this.opt('navLinks')) {
                return '<a' + attrs +
                        ' data-goto="' + htmlEscape(JSON.stringify(finalOptions)) + '">' +
                        innerHtml +
                        '</a>';
        }
        else {
                return '<span' + attrs + '>' +
                        innerHtml +
                        '</span>';
        }
},

// Date Formatting Utils
// ---------------------------------------------------------------------------------------------------------------

// Utility for formatting a range. Accepts a range object, formatting string, and optional separator.
// Displays all-day ranges naturally, with an inclusive end. Takes the current isRTL into account.
// The timezones of the dates within `range` will be respected.
formatRange: function(range, isAllDay, formatStr, separator) {
        var end = range.end;

        if (isAllDay) {
                end = end.clone().subtract(1); // convert to inclusive. last ms of previous day
        }

        return formatRange(range.start, end, formatStr, separator, this.isRTL);
},

getAllDayHtml: function() {
        return this.opt('allDayHtml') || htmlEscape(this.opt('allDayText'));
},

// Computes HTML classNames for a single-day element
getDayClasses: function(date, noThemeHighlight) {
        var view = this._getView();
        var classes = [];
        var today;

        if (!view.activeUnzonedRange.containsDate(date)) {
                classes.push('fc-disabled-day'); // TODO: jQuery UI theme?
        }
        else {
                classes.push('fc-' + dayIDs[date.day()]);

                if (view.isDateInOtherMonth(date)) { // TODO: use ChronoComponent subclass somehow
                        classes.push('fc-other-month');
                }

                today = view.calendar.getNow();

                if (date.isSame(today, 'day')) {
                        classes.push('fc-today');

                        if (noThemeHighlight !== true) {
                                classes.push(view.calendar.theme.getClass('today'));
                        }
                }
                else if (date < today) {
                        classes.push('fc-past');
                }
                else {
                        classes.push('fc-future');
                }
        }

        return classes;
},

// Date Utils
// ---------------------------------------------------------------------------------------------------------------

// Returns the date range of the full days the given range visually appears to occupy.
// Returns a plain object with start/end, NOT an UnzonedRange!
computeDayRange: function(unzonedRange) {
        var calendar = this._getCalendar();
        var startDay = calendar.msToUtcMoment(unzonedRange.startMs, true); // the beginning of the day the range starts
        var end = calendar.msToUtcMoment(unzonedRange.endMs);
        var endTimeMS = +end.time(); // # of milliseconds into `endDay`
        var endDay = end.clone().stripTime(); // the beginning of the day the range exclusively ends

        // If the end time is actually inclusively part of the next day and is equal to or
        // beyond the next day threshold, adjust the end to be the exclusive end of `endDay`.
        // Otherwise, leaving it as inclusive will cause it to exclude `endDay`.
        if (endTimeMS && endTimeMS >= this.nextDayThreshold) {
                endDay.add(1, 'days');
        }

        // If end is within `startDay` but not past nextDayThreshold, assign the default duration of one day.
        if (endDay <= startDay) {
                endDay = startDay.clone().add(1, 'days');
        }

        return { start: startDay, end: endDay };
},

// Does the given range visually appear to occupy more than one day?
isMultiDayRange: function(unzonedRange) {
        var dayRange = this.computeDayRange(unzonedRange);

        return dayRange.end.diff(dayRange.start, 'days') > 1;
},

// Utils
// ---------------------------------------------------------------------------------------------------------------

callChildren: function(methodName) {
        var args = Array.prototype.slice.call(arguments, 1);
        var children = this.children;
        var i, child;

        for (i = 0; i < children.length; i++) {
                child = children[i];
                child[methodName].apply(child, args);
        }
},

_getCalendar: function() { // TODO: strip out. move to generic parent.
        return this.calendar || this.view.calendar;
},

_getView: function() { // TODO: strip out. move to generic parent.
        return this.view;
}

});

;;

/* An abstract class comprised of a “grid” of areas that each represent a specific datetime


Contains:

*/

var Grid = FC.Grid = ChronoComponent.extend({

// self-config, overridable by subclasses
hasDayInteractions: true, // can user click/select ranges of time?

view: null, // a View object
isRTL: null, // shortcut to the view's isRTL option

unzonedRange: null,

hitsNeededDepth: 0, // necessary because multiple callers might need the same hits

dayClickListener: null,
daySelectListener: null,
segDragListener: null,
segResizeListener: null,
externalDragListener: null,

constructor: function(view) {
        this.view = view;

        ChronoComponent.call(this);

        this.initFillInternals();

        this.dayClickListener = this.buildDayClickListener();
        this.daySelectListener = this.buildDaySelectListener();
},

opt: function(name) {
        return this.view.opt(name);
},

/* Dates
------------------------------------------------------------------------------------------------------------------*/

// Tells the grid about what period of time to display.
// Any date-related internal data should be generated.
setRange: function(unzonedRange) {
        this.unzonedRange = unzonedRange;

        this.rangeUpdated();
        this.processRangeOptions();
},

// Called when internal variables that rely on the range should be updated
rangeUpdated: function() {
},

// Updates values that rely on options and also relate to range
processRangeOptions: function() {
        var displayEventTime;
        var displayEventEnd;

        this.eventTimeFormat = // for Grid.event-rendering.js
                this.opt('eventTimeFormat') ||
                this.opt('timeFormat') || // deprecated
                this.computeEventTimeFormat();

        displayEventTime = this.opt('displayEventTime');
        if (displayEventTime == null) {
                displayEventTime = this.computeDisplayEventTime(); // might be based off of range
        }

        displayEventEnd = this.opt('displayEventEnd');
        if (displayEventEnd == null) {
                displayEventEnd = this.computeDisplayEventEnd(); // might be based off of range
        }

        this.displayEventTime = displayEventTime;
        this.displayEventEnd = displayEventEnd;
},

/* Hit Area
------------------------------------------------------------------------------------------------------------------*/

hitsNeeded: function() {
        if (!(this.hitsNeededDepth++)) {
                this.prepareHits();
        }
},

hitsNotNeeded: function() {
        if (this.hitsNeededDepth && !(--this.hitsNeededDepth)) {
                this.releaseHits();
        }
},

getSafeHitFootprint: function(hit) {
        var footprint = this.getHitFootprint(hit);

        if (!this.view.activeUnzonedRange.containsRange(footprint.unzonedRange)) {
                return null;
        }

        return footprint;
},

getHitFootprint: function(hit) {
},

// Given position-level information about a date-related area within the grid,
// should return a jQuery element that best represents it. passed to dayClick callback.
getHitEl: function(hit) {
},

/* Rendering
------------------------------------------------------------------------------------------------------------------*/

// Sets the container element that the grid should render inside of.
// Does other DOM-related initializations.
setElement: function(el) {
        ChronoComponent.prototype.setElement.apply(this, arguments);

        if (this.hasDayInteractions) {
                preventSelection(el);

                this.bindDayHandler('touchstart', this.dayTouchStart);
                this.bindDayHandler('mousedown', this.dayMousedown);
        }

        // attach event-element-related handlers. in Grid.events
        // same garbage collection note as above.
        this.bindSegHandlers();
},

bindDayHandler: function(name, handler) {
        var _this = this;

        // attach a handler to the grid's root element.
        // jQuery will take care of unregistering them when removeElement gets called.
        this.el.on(name, function(ev) {
                if (
                        !$(ev.target).is(
                                _this.segSelector + ',' + // directly on an event element
                                _this.segSelector + ' *,' + // within an event element
                                '.fc-more,' + // a "more.." link
                                'a[data-goto]' // a clickable nav link
                        )
                ) {
                        return handler.call(_this, ev);
                }
        });
},

// Removes the grid's container element from the DOM. Undoes any other DOM-related attachments.
// DOES NOT remove any content beforehand (doesn't clear events or call unrenderDates), unlike View
removeElement: function() {
        ChronoComponent.prototype.removeElement.apply(this, arguments);

        this.clearDragListeners();
},

/* Handlers
------------------------------------------------------------------------------------------------------------------*/

// Binds DOM handlers to elements that reside outside the grid, such as the document
bindGlobalHandlers: function() {
        ChronoComponent.prototype.bindGlobalHandlers.apply(this, arguments);

        this.listenTo($(document), {
                dragstart: this.externalDragStart, // jqui
                sortstart: this.externalDragStart // jqui
        });
},

// Unbinds DOM handlers from elements that reside outside the grid
unbindGlobalHandlers: function() {
        ChronoComponent.prototype.unbindGlobalHandlers.apply(this, arguments);

        this.stopListeningTo($(document));
},

// Process a mousedown on an element that represents a day. For day clicking and selecting.
dayMousedown: function(ev) {

        // HACK
        // This will still work even though bindDayHandler doesn't use GlobalEmitter.
        if (GlobalEmitter.get().shouldIgnoreMouse()) {
                return;
        }

        this.dayClickListener.startInteraction(ev);

        if (this.opt('selectable')) {
                this.daySelectListener.startInteraction(ev, {
                        distance: this.opt('selectMinDistance')
                });
        }
},

dayTouchStart: function(ev) {
        var view = this.view;
        var selectLongPressDelay;

        // On iOS (and Android?) when a new selection is initiated overtop another selection,
        // the touchend never fires because the elements gets removed mid-touch-interaction (my theory).
        // HACK: simply don't allow this to happen.
        // ALSO: prevent selection when an *event* is already raised.
        if (view.isSelected || view.selectedEvent) {
                return;
        }

        selectLongPressDelay = this.opt('selectLongPressDelay');
        if (selectLongPressDelay == null) {
                selectLongPressDelay = this.opt('longPressDelay'); // fallback
        }

        this.dayClickListener.startInteraction(ev);

        if (this.opt('selectable')) {
                this.daySelectListener.startInteraction(ev, {
                        delay: selectLongPressDelay
                });
        }
},

// Kills all in-progress dragging.
// Useful for when public API methods that result in re-rendering are invoked during a drag.
// Also useful for when touch devices misbehave and don't fire their touchend.
clearDragListeners: function() {
        this.dayClickListener.endInteraction();
        this.daySelectListener.endInteraction();

        if (this.segDragListener) {
                this.segDragListener.endInteraction(); // will clear this.segDragListener
        }
        if (this.segResizeListener) {
                this.segResizeListener.endInteraction(); // will clear this.segResizeListener
        }
        if (this.externalDragListener) {
                this.externalDragListener.endInteraction(); // will clear this.externalDragListener
        }
},

/* Highlight
------------------------------------------------------------------------------------------------------------------*/

// Renders an emphasis on the given date range. Given a span (unzoned start/end and other misc data)
renderHighlight: function(componentFootprint) {
        this.renderFill('highlight', this.componentFootprintToSegs(componentFootprint));
},

// Unrenders the emphasis on a date range
unrenderHighlight: function() {
        this.unrenderFill('highlight');
},

/* Converting eventRange -> eventFootprint
------------------------------------------------------------------------------------------------------------------*/

eventRangesToEventFootprints: function(eventRanges) {
        var eventFootprints = [];
        var i;

        for (i = 0; i < eventRanges.length; i++) {
                eventFootprints.push.apply(eventFootprints,
                        this.eventRangeToEventFootprints(eventRanges[i])
                );
        }

        return eventFootprints;
},

// Given an event's unzoned date range, return an array of eventSpan objects.
// eventSpan - { start, end, isStart, isEnd, otherthings... }
// Subclasses can override.
// Subclasses are obligated to forward eventRange.isStart/isEnd to the resulting spans.
// TODO: somehow more DRY with Calendar::eventRangeToEventFootprints
eventRangeToEventFootprints: function(eventRange) {
        return [
                new EventFootprint(
                        new ComponentFootprint(
                                eventRange.unzonedRange,
                                eventRange.eventDef.isAllDay()
                        ),
                        eventRange.eventDef,
                        eventRange.eventInstance // might not exist
                )
        ];
},

/* Converting componentFootprint/eventFootprint -> segs
------------------------------------------------------------------------------------------------------------------*/

eventFootprintsToSegs: function(eventFootprints) {
        var segs = [];
        var i;

        for (i = 0; i < eventFootprints.length; i++) {
                segs.push.apply(segs,
                        this.eventFootprintToSegs(eventFootprints[i])
                );
        }

        return segs;
},

// Given an event's span (unzoned start/end and other misc data), and the event itself,
// slices into segments and attaches event-derived properties to them.
// eventSpan - { start, end, isStart, isEnd, otherthings... }
// constraintRange allow additional clipping. optional. eventually remove this.
eventFootprintToSegs: function(eventFootprint, constraintRange) {
        var unzonedRange = eventFootprint.componentFootprint.unzonedRange;
        var segs;
        var i, seg;

        if (constraintRange) {
                unzonedRange = unzonedRange.intersect(constraintRange);
        }

        segs = this.componentFootprintToSegs(eventFootprint.componentFootprint);

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];

                if (!unzonedRange.isStart) {
                        seg.isStart = false;
                }
                if (!unzonedRange.isEnd) {
                        seg.isEnd = false;
                }

                seg.footprint = eventFootprint;
                // TODO: rename to seg.eventFootprint
        }

        return segs;
},

componentFootprintToSegs: function(componentFootprint) {
        // subclasses must implement
}

});

;;

Grid.mixin({

// Creates a listener that tracks the user's drag across day elements, for day clicking.
buildDayClickListener: function() {
        var _this = this;
        var dayClickHit; // null if invalid dayClick

        var dragListener = new HitDragListener(this, {
                scroll: this.opt('dragScroll'),
                interactionStart: function() {
                        dayClickHit = dragListener.origHit;
                },
                hitOver: function(hit, isOrig, origHit) {
                        // if user dragged to another cell at any point, it can no longer be a dayClick
                        if (!isOrig) {
                                dayClickHit = null;
                        }
                },
                hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
                        dayClickHit = null;
                },
                interactionEnd: function(ev, isCancelled) {
                        var componentFootprint;

                        if (!isCancelled && dayClickHit) {
                                componentFootprint = _this.getSafeHitFootprint(dayClickHit);

                                if (componentFootprint) {
                                        _this.view.triggerDayClick(componentFootprint, _this.getHitEl(dayClickHit), ev);
                                }
                        }
                }
        });

        // because dayClickListener won't be called with any time delay, "dragging" will begin immediately,
        // which will kill any touchmoving/scrolling. Prevent this.
        dragListener.shouldCancelTouchScroll = false;

        dragListener.scrollAlwaysKills = true;

        return dragListener;
}

});

;;

Grid.mixin({

// Creates a listener that tracks the user's drag across day elements, for day selecting.
buildDaySelectListener: function() {
        var _this = this;
        var selectionFootprint; // null if invalid selection

        var dragListener = new HitDragListener(this, {
                scroll: this.opt('dragScroll'),
                interactionStart: function() {
                        selectionFootprint = null;
                },
                dragStart: function() {
                        _this.view.unselect(); // since we could be rendering a new selection, we want to clear any old one
                },
                hitOver: function(hit, isOrig, origHit) {
                        var origHitFootprint;
                        var hitFootprint;

                        if (origHit) { // click needs to have started on a hit

                                origHitFootprint = _this.getSafeHitFootprint(origHit);
                                hitFootprint = _this.getSafeHitFootprint(hit);

                                if (origHitFootprint && hitFootprint) {
                                        selectionFootprint = _this.computeSelection(origHitFootprint, hitFootprint);
                                }
                                else {
                                        selectionFootprint = null;
                                }

                                if (selectionFootprint) {
                                        _this.renderSelectionFootprint(selectionFootprint);
                                }
                                else if (selectionFootprint === false) {
                                        disableCursor();
                                }
                        }
                },
                hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
                        selectionFootprint = null;
                        _this.unrenderSelection();
                },
                hitDone: function() { // called after a hitOut OR before a dragEnd
                        enableCursor();
                },
                interactionEnd: function(ev, isCancelled) {
                        if (!isCancelled && selectionFootprint) {
                                // the selection will already have been rendered. just report it
                                _this.view.reportSelection(selectionFootprint, ev);
                        }
                }
        });

        return dragListener;
},

// Renders a visual indication of a selection. Will highlight by default but can be overridden by subclasses.
// Given a span (unzoned start/end and other misc data)
renderSelectionFootprint: function(componentFootprint) {
        this.renderHighlight(componentFootprint);
},

// Unrenders any visual indications of a selection. Will unrender a highlight by default.
unrenderSelection: function() {
        this.unrenderHighlight();
},

// Given the first and last date-spans of a selection, returns another date-span object.
// Subclasses can override and provide additional data in the span object. Will be passed to renderSelectionFootprint().
// Will return false if the selection is invalid and this should be indicated to the user.
// Will return null/undefined if a selection invalid but no error should be reported.
computeSelection: function(footprint0, footprint1) {
        var wholeFootprint = this.computeSelectionFootprint(footprint0, footprint1);

        if (wholeFootprint && !this.isSelectionFootprintAllowed(wholeFootprint)) {
                return false;
        }

        return wholeFootprint;
},

// Given two spans, must return the combination of the two.
// TODO: do this separation of concerns (combining VS validation) for event dnd/resize too.
// Assumes both footprints are non-open-ended.
computeSelectionFootprint: function(footprint0, footprint1) {
        var ms = [
                footprint0.unzonedRange.startMs,
                footprint0.unzonedRange.endMs,
                footprint1.unzonedRange.startMs,
                footprint1.unzonedRange.endMs
        ];

        ms.sort(compareNumbers);

        return new ComponentFootprint(
                new UnzonedRange(ms[0], ms[3]),
                footprint0.isAllDay
        );
},

isSelectionFootprintAllowed: function(componentFootprint) {
        return this.view.validUnzonedRange.containsRange(componentFootprint.unzonedRange) &&
                this.view.calendar.isSelectionFootprintAllowed(componentFootprint);
}

});

;;

Grid.mixin({

// Generates an array of classNames to be used for the rendering business hours overlay. Called by the fill system.
// Called by fillSegHtml.
businessHoursSegClasses: function(seg) {
        return [ 'fc-nonbusiness', 'fc-bgevent' ];
},

// Compute business hour segs for the grid's current date range.
// Caller must ask if whole-day business hours are needed.
buildBusinessHourSegs: function(wholeDay) {
        return this.eventFootprintsToSegs(
                this.buildBusinessHourEventFootprints(wholeDay)
        );
},

// Compute business hour *events* for the grid's current date range.
// Caller must ask if whole-day business hours are needed.
// FOR RENDERING
buildBusinessHourEventFootprints: function(wholeDay) {
        var calendar = this.view.calendar;

        return this._buildBusinessHourEventFootprints(wholeDay, calendar.opt('businessHours'));
},

_buildBusinessHourEventFootprints: function(wholeDay, businessHourDef) {
        var calendar = this.view.calendar;
        var eventInstanceGroup;
        var eventRanges;

        eventInstanceGroup = calendar.buildBusinessInstanceGroup(
                wholeDay,
                businessHourDef,
                this.unzonedRange
        );

        if (eventInstanceGroup) {
                eventRanges = eventInstanceGroup.sliceRenderRanges(
                        this.unzonedRange,
                        calendar
                );
        }
        else {
                eventRanges = [];
        }

        return this.eventRangesToEventFootprints(eventRanges);
}

});

;;

Grid.mixin({

segs: null, // the *event* segments currently rendered in the grid. TODO: rename to `eventSegs`

// derived from options
// TODO: move initialization from Grid.js
eventTimeFormat: null,
displayEventTime: null,
displayEventEnd: null,

// Generates the format string used for event time text, if not explicitly defined by 'timeFormat'
computeEventTimeFormat: function() {
        return this.opt('smallTimeFormat');
},

// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventTime'.
// Only applies to non-all-day events.
computeDisplayEventTime: function() {
        return true;
},

// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventEnd'
computeDisplayEventEnd: function() {
        return true;
},

renderEventsPayload: function(eventsPayload) {
        var id, eventInstanceGroup;
        var eventRenderRanges;
        var eventFootprints;
        var eventSegs;
        var bgSegs = [];
        var fgSegs = [];

        for (id in eventsPayload) {
                eventInstanceGroup = eventsPayload[id];

                eventRenderRanges = eventInstanceGroup.sliceRenderRanges(this.view.activeUnzonedRange);
                eventFootprints = this.eventRangesToEventFootprints(eventRenderRanges);
                eventSegs = this.eventFootprintsToSegs(eventFootprints);

                if (eventInstanceGroup.getEventDef().hasBgRendering()) {
                        bgSegs.push.apply(bgSegs, // append
                                eventSegs
                        );
                }
                else {
                        fgSegs.push.apply(fgSegs, // append
                                eventSegs
                        );
                }
        }

        this.segs = [].concat( // record all segs
                this.renderBgSegs(bgSegs) || bgSegs,
                this.renderFgSegs(fgSegs) || fgSegs
        );
},

// Unrenders all events currently rendered on the grid
unrenderEvents: function() {
        this.handleSegMouseout(); // trigger an eventMouseout if user's mouse is over an event
        this.clearDragListeners();

        this.unrenderFgSegs();
        this.unrenderBgSegs();

        this.segs = null;
},

// Retrieves all rendered segment objects currently rendered on the grid
getEventSegs: function() {
        return this.segs || [];
},

// Background Segment Rendering
// ---------------------------------------------------------------------------------------------------------------
// TODO: move this to ChronoComponent, but without fill

// Renders the given background event segments onto the grid.
// Returns a subset of the segs that were actually rendered.
renderBgSegs: function(segs) {
        return this.renderFill('bgEvent', segs);
},

// Unrenders all the currently rendered background event segments
unrenderBgSegs: function() {
        this.unrenderFill('bgEvent');
},

// Renders a background event element, given the default rendering. Called by the fill system.
bgEventSegEl: function(seg, el) {
        return this.filterEventRenderEl(seg.footprint, el);
},

// Generates an array of classNames to be used for the default rendering of a background event.
// Called by fillSegHtml.
bgEventSegClasses: function(seg) {
        var eventDef = seg.footprint.eventDef;

        return [ 'fc-bgevent' ].concat(
                eventDef.className,
                eventDef.source.className
        );
},

// Generates a semicolon-separated CSS string to be used for the default rendering of a background event.
// Called by fillSegHtml.
bgEventSegCss: function(seg) {
        return {
                'background-color': this.getSegSkinCss(seg)['background-color']
        };
},

/* Rendering Utils
------------------------------------------------------------------------------------------------------------------*/

// Compute the text that should be displayed on an event's element.
// `range` can be the Event object itself, or something range-like, with at least a `start`.
// If event times are disabled, or the event has no time, will return a blank string.
// If not specified, formatStr will default to the eventTimeFormat setting,
// and displayEnd will default to the displayEventEnd setting.
getEventTimeText: function(eventFootprint, formatStr, displayEnd) {
        return this._getEventTimeText(
                eventFootprint.eventInstance.dateProfile.start,
                eventFootprint.eventInstance.dateProfile.end,
                eventFootprint.componentFootprint.isAllDay,
                formatStr,
                displayEnd
        );
},

_getEventTimeText: function(start, end, isAllDay, formatStr, displayEnd) {

        if (formatStr == null) {
                formatStr = this.eventTimeFormat;
        }

        if (displayEnd == null) {
                displayEnd = this.displayEventEnd;
        }

        if (this.displayEventTime && !isAllDay) {
                if (displayEnd && end) {
                        return this.view.formatRange(
                                { start: start, end: end },
                                false, // allDay
                                formatStr
                        );
                }
                else {
                        return start.format(formatStr);
                }
        }

        return '';
},

// Generic utility for generating the HTML classNames for an event segment's element
getSegClasses: function(seg, isDraggable, isResizable) {
        var view = this.view;
        var classes = [
                'fc-event',
                seg.isStart ? 'fc-start' : 'fc-not-start',
                seg.isEnd ? 'fc-end' : 'fc-not-end'
        ].concat(this.getSegCustomClasses(seg));

        if (isDraggable) {
                classes.push('fc-draggable');
        }
        if (isResizable) {
                classes.push('fc-resizable');
        }

        // event is currently selected? attach a className.
        if (view.isEventDefSelected(seg.footprint.eventDef)) {
                classes.push('fc-selected');
        }

        return classes;
},

// List of classes that were defined by the caller of the API in some way
getSegCustomClasses: function(seg) {
        var eventDef = seg.footprint.eventDef;

        return [].concat(
                eventDef.className, // guaranteed to be an array
                eventDef.source.className
        );
},

// Utility for generating event skin-related CSS properties
getSegSkinCss: function(seg) {
        return {
                'background-color': this.getSegBackgroundColor(seg),
                'border-color': this.getSegBorderColor(seg),
                color: this.getSegTextColor(seg)
        };
},

// Queries for caller-specified color, then falls back to default
getSegBackgroundColor: function(seg) {
        var eventDef = seg.footprint.eventDef;

        return eventDef.backgroundColor ||
                eventDef.color ||
                this.getSegDefaultBackgroundColor(seg);
},

getSegDefaultBackgroundColor: function(seg) {
        var source = seg.footprint.eventDef.source;

        return source.backgroundColor ||
                source.color ||
                this.opt('eventBackgroundColor') ||
                this.opt('eventColor');
},

// Queries for caller-specified color, then falls back to default
getSegBorderColor: function(seg) {
        var eventDef = seg.footprint.eventDef;

        return eventDef.borderColor ||
                eventDef.color ||
                this.getSegDefaultBorderColor(seg);
},

getSegDefaultBorderColor: function(seg) {
        var source = seg.footprint.eventDef.source;

        return source.borderColor ||
                source.color ||
                this.opt('eventBorderColor') ||
                this.opt('eventColor');
},

// Queries for caller-specified color, then falls back to default
getSegTextColor: function(seg) {
        var eventDef = seg.footprint.eventDef;

        return eventDef.textColor ||
                this.getSegDefaultTextColor(seg);
},

getSegDefaultTextColor: function(seg) {
        var source = seg.footprint.eventDef.source;

        return source.textColor ||
                this.opt('eventTextColor');
},

sortEventSegs: function(segs) {
        segs.sort(proxy(this, 'compareEventSegs'));
},

// A cmp function for determining which segments should take visual priority
compareEventSegs: function(seg1, seg2) {
        var f1 = seg1.footprint.componentFootprint;
        var r1 = f1.unzonedRange;
        var f2 = seg2.footprint.componentFootprint;
        var r2 = f2.unzonedRange;

        return r1.startMs - r2.startMs || // earlier events go first
                (r2.endMs - r2.startMs) - (r1.endMs - r1.startMs) || // tie? longer events go first
                f2.isAllDay - f1.isAllDay || // tie? put all-day events first (booleans cast to 0/1)
                compareByFieldSpecs(
                        seg1.footprint.eventDef,
                        seg2.footprint.eventDef,
                        this.view.eventOrderSpecs
                );
}

});

;;

/* Contains:

*/ Grid.mixin({

// self-config, overridable by subclasses
segSelector: '.fc-event-container > *', // what constitutes an event element?

mousedOverSeg: null, // the segment object the user's mouse is over. null if over nothing

// if defined, holds the unit identified (ex: "year" or "month") that determines the level of granularity
// of the date areas. if not defined, assumes to be day and time granularity.
// TODO: port isTimeScale into same system?
largeUnit: null,

// Diffs the two dates, returning a duration, based on granularity of the grid
// TODO: port isTimeScale into this system?
diffDates: function(a, b) {
        if (this.largeUnit) {
                return diffByUnit(a, b, this.largeUnit);
        }
        else {
                return diffDayTime(a, b);
        }
},

// Attaches event-element-related handlers for *all* rendered event segments of the view.
bindSegHandlers: function() {
        this.bindSegHandlersToEl(this.el);
},

// Attaches event-element-related handlers to an arbitrary container element. leverages bubbling.
bindSegHandlersToEl: function(el) {
        this.bindSegHandlerToEl(el, 'touchstart', this.handleSegTouchStart);
        this.bindSegHandlerToEl(el, 'mouseenter', this.handleSegMouseover);
        this.bindSegHandlerToEl(el, 'mouseleave', this.handleSegMouseout);
        this.bindSegHandlerToEl(el, 'mousedown', this.handleSegMousedown);
        this.bindSegHandlerToEl(el, 'click', this.handleSegClick);
},

// Executes a handler for any a user-interaction on a segment.
// Handler gets called with (seg, ev), and with the `this` context of the Grid
bindSegHandlerToEl: function(el, name, handler) {
        var _this = this;

        el.on(name, this.segSelector, function(ev) {
                var seg = $(this).data('fc-seg'); // grab segment data. put there by View::renderEventsPayload

                // only call the handlers if there is not a drag/resize in progress
                if (seg && !_this.isDraggingSeg && !_this.isResizingSeg) {
                        return handler.call(_this, seg, ev); // context will be the Grid
                }
        });
},

handleSegClick: function(seg, ev) {
        var res = this.publiclyTrigger('eventClick', { // can return `false` to cancel
                context: seg.el[0],
                args: [ seg.footprint.getEventLegacy(), ev, this.view ]
        });

        if (res === false) {
                ev.preventDefault();
        }
},

// Updates internal state and triggers handlers for when an event element is moused over
handleSegMouseover: function(seg, ev) {
        if (
                !GlobalEmitter.get().shouldIgnoreMouse() &&
                !this.mousedOverSeg
        ) {
                this.mousedOverSeg = seg;

                if (this.view.isEventDefResizable(seg.footprint.eventDef)) {
                        seg.el.addClass('fc-allow-mouse-resize');
                }

                this.publiclyTrigger('eventMouseover', {
                        context: seg.el[0],
                        args: [ seg.footprint.getEventLegacy(), ev, this.view ]
                });
        }
},

// Updates internal state and triggers handlers for when an event element is moused out.
// Can be given no arguments, in which case it will mouseout the segment that was previously moused over.
handleSegMouseout: function(seg, ev) {
        ev = ev || {}; // if given no args, make a mock mouse event

        if (this.mousedOverSeg) {
                seg = seg || this.mousedOverSeg; // if given no args, use the currently moused-over segment
                this.mousedOverSeg = null;

                if (this.view.isEventDefResizable(seg.footprint.eventDef)) {
                        seg.el.removeClass('fc-allow-mouse-resize');
                }

                this.publiclyTrigger('eventMouseout', {
                        context: seg.el[0],
                        args: [ seg.footprint.getEventLegacy(), ev, this.view ]
                });
        }
},

handleSegMousedown: function(seg, ev) {
        var isResizing = this.startSegResize(seg, ev, { distance: 5 });

        if (!isResizing && this.view.isEventDefDraggable(seg.footprint.eventDef)) {
                this.buildSegDragListener(seg)
                        .startInteraction(ev, {
                                distance: 5
                        });
        }
},

handleSegTouchStart: function(seg, ev) {
        var view = this.view;
        var eventDef = seg.footprint.eventDef;
        var isSelected = view.isEventDefSelected(eventDef);
        var isDraggable = view.isEventDefDraggable(eventDef);
        var isResizable = view.isEventDefResizable(eventDef);
        var isResizing = false;
        var dragListener;
        var eventLongPressDelay;

        if (isSelected && isResizable) {
                // only allow resizing of the event is selected
                isResizing = this.startSegResize(seg, ev);
        }

        if (!isResizing && (isDraggable || isResizable)) { // allowed to be selected?

                eventLongPressDelay = this.opt('eventLongPressDelay');
                if (eventLongPressDelay == null) {
                        eventLongPressDelay = this.opt('longPressDelay'); // fallback
                }

                dragListener = isDraggable ?
                        this.buildSegDragListener(seg) :
                        this.buildSegSelectListener(seg); // seg isn't draggable, but still needs to be selected

                dragListener.startInteraction(ev, { // won't start if already started
                        delay: isSelected ? 0 : eventLongPressDelay // do delay if not already selected
                });
        }
},

// seg isn't draggable, but let's use a generic DragListener
// simply for the delay, so it can be selected.
// Has side effect of setting/unsetting `segDragListener`
buildSegSelectListener: function(seg) {
        var _this = this;
        var view = this.view;
        var eventDef = seg.footprint.eventDef;
        var eventInstance = seg.footprint.eventInstance; // null for inverse-background events

        if (this.segDragListener) {
                return this.segDragListener;
        }

        var dragListener = this.segDragListener = new DragListener({
                dragStart: function(ev) {
                        if (
                                dragListener.isTouch &&
                                !view.isEventDefSelected(eventDef) &&
                                eventInstance
                        ) {
                                // if not previously selected, will fire after a delay. then, select the event
                                view.selectEventInstance(eventInstance);
                        }
                },
                interactionEnd: function(ev) {
                        _this.segDragListener = null;
                }
        });

        return dragListener;
},

// is it allowed, in relation to the view's validRange?
// NOTE: very similar to isExternalInstanceGroupAllowed
isEventInstanceGroupAllowed: function(eventInstanceGroup) {
        var eventFootprints = this.eventRangesToEventFootprints(eventInstanceGroup.getAllEventRanges());
        var i;

        for (i = 0; i < eventFootprints.length; i++) {
                // TODO: just use getAllEventRanges directly
                if (!this.view.validUnzonedRange.containsRange(eventFootprints[i].componentFootprint.unzonedRange)) {
                        return false;
                }
        }

        return this.view.calendar.isEventInstanceGroupAllowed(eventInstanceGroup);
},

/* Event Helper
------------------------------------------------------------------------------------------------------------------*/
// TODO: should probably move this to Grid.events, like we did event dragging / resizing

renderHelperEventFootprints: function(eventFootprints, sourceSeg) {
        return this.renderHelperEventFootprintEls(eventFootprints, sourceSeg)
                .addClass('fc-helper');
},

renderHelperEventFootprintEls: function(eventFootprints, sourceSeg) {
        // Subclasses must implement.
        // Must return all mock event elements.
},

// Unrenders a mock event
// TODO: have this in ChronoComponent
unrenderHelper: function() {
        // subclasses must implement
},

fabricateEventFootprint: function(componentFootprint) {
        var calendar = this.view.calendar;
        var eventDateProfile = calendar.footprintToDateProfile(componentFootprint);
        var dummyEvent = new SingleEventDef(new EventSource(calendar));
        var dummyInstance;

        dummyEvent.dateProfile = eventDateProfile;
        dummyInstance = dummyEvent.buildInstance();

        return new EventFootprint(componentFootprint, dummyEvent, dummyInstance);
}

});

;;

/* Wired up via Grid.event-interation.js by calling buildSegDragListener */ Grid.mixin({

isDraggingSeg: false, // is a segment being dragged? boolean

// Builds a listener that will track user-dragging on an event segment.
// Generic enough to work with any type of Grid.
// Has side effect of setting/unsetting `segDragListener`
buildSegDragListener: function(seg) {
        var _this = this;
        var view = this.view;
        var calendar = view.calendar;
        var eventManager = calendar.eventManager;
        var el = seg.el;
        var eventDef = seg.footprint.eventDef;
        var eventInstance = seg.footprint.eventInstance; // null for inverse-background events
        var isDragging;
        var mouseFollower; // A clone of the original element that will move with the mouse
        var eventDefMutation;

        if (this.segDragListener) {
                return this.segDragListener;
        }

        // Tracks mouse movement over the *view's* coordinate map. Allows dragging and dropping between subcomponents
        // of the view.
        var dragListener = this.segDragListener = new HitDragListener(view, {
                scroll: this.opt('dragScroll'),
                subjectEl: el,
                subjectCenter: true,
                interactionStart: function(ev) {
                        seg.component = _this; // for renderDrag
                        isDragging = false;
                        mouseFollower = new MouseFollower(seg.el, {
                                additionalClass: 'fc-dragging',
                                parentEl: view.el,
                                opacity: dragListener.isTouch ? null : _this.opt('dragOpacity'),
                                revertDuration: _this.opt('dragRevertDuration'),
                                zIndex: 2 // one above the .fc-view
                        });
                        mouseFollower.hide(); // don't show until we know this is a real drag
                        mouseFollower.start(ev);
                },
                dragStart: function(ev) {
                        if (
                                dragListener.isTouch &&
                                !view.isEventDefSelected(eventDef) &&
                                eventInstance
                        ) {
                                // if not previously selected, will fire after a delay. then, select the event
                                view.selectEventInstance(eventInstance);
                        }
                        isDragging = true;
                        _this.handleSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
                        _this.segDragStart(seg, ev);
                        view.hideEventsWithId(eventDef.id); // hide all event segments. our mouseFollower will take over
                },
                hitOver: function(hit, isOrig, origHit) {
                        var isAllowed = true;
                        var origFootprint;
                        var footprint;
                        var mutatedEventInstanceGroup;
                        var dragHelperEls;

                        // starting hit could be forced (DayGrid.limit)
                        if (seg.hit) {
                                origHit = seg.hit;
                        }

                        // hit might not belong to this grid, so query origin grid
                        origFootprint = origHit.component.getSafeHitFootprint(origHit);
                        footprint = hit.component.getSafeHitFootprint(hit);

                        if (origFootprint && footprint) {
                                eventDefMutation = _this.computeEventDropMutation(origFootprint, footprint, eventDef);

                                if (eventDefMutation) {
                                        mutatedEventInstanceGroup = eventManager.buildMutatedEventInstanceGroup(
                                                eventDef.id,
                                                eventDefMutation
                                        );
                                        isAllowed = _this.isEventInstanceGroupAllowed(mutatedEventInstanceGroup);
                                }
                                else {
                                        isAllowed = false;
                                }
                        }
                        else {
                                isAllowed = false;
                        }

                        if (!isAllowed) {
                                eventDefMutation = null;
                                disableCursor();
                        }

                        // if a valid drop location, have the subclass render a visual indication
                        if (
                                eventDefMutation &&
                                (dragHelperEls = view.renderDrag(
                                        _this.eventRangesToEventFootprints(
                                                mutatedEventInstanceGroup.sliceRenderRanges(_this.unzonedRange, calendar)
                                        ),
                                        seg
                                ))
                        ) {
                                dragHelperEls.addClass('fc-dragging');
                                if (!dragListener.isTouch) {
                                        _this.applyDragOpacity(dragHelperEls);
                                }

                                mouseFollower.hide(); // if the subclass is already using a mock event "helper", hide our own
                        }
                        else {
                                mouseFollower.show(); // otherwise, have the helper follow the mouse (no snapping)
                        }

                        if (isOrig) {
                                // needs to have moved hits to be a valid drop
                                eventDefMutation = null;
                        }
                },
                hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
                        view.unrenderDrag(); // unrender whatever was done in renderDrag
                        mouseFollower.show(); // show in case we are moving out of all hits
                        eventDefMutation = null;
                },
                hitDone: function() { // Called after a hitOut OR before a dragEnd
                        enableCursor();
                },
                interactionEnd: function(ev) {
                        delete seg.component; // prevent side effects

                        // do revert animation if hasn't changed. calls a callback when finished (whether animation or not)
                        mouseFollower.stop(!eventDefMutation, function() {
                                if (isDragging) {
                                        view.unrenderDrag();
                                        _this.segDragStop(seg, ev);
                                }

                                if (eventDefMutation) {
                                        // no need to re-show original, will rerender all anyways. esp important if eventRenderWait
                                        view.reportEventDrop(eventInstance, eventDefMutation, el, ev);
                                }
                                else {
                                        view.showEventsWithId(eventDef.id);
                                }
                        });
                        _this.segDragListener = null;
                }
        });

        return dragListener;
},

// Called before event segment dragging starts
segDragStart: function(seg, ev) {
        this.isDraggingSeg = true;
        this.publiclyTrigger('eventDragStart', {
                context: seg.el[0],
                args: [
                        seg.footprint.getEventLegacy(),
                        ev,
                        {}, // jqui dummy
                        this.view
                ]
        });
},

// Called after event segment dragging stops
segDragStop: function(seg, ev) {
        this.isDraggingSeg = false;
        this.publiclyTrigger('eventDragStop', {
                context: seg.el[0],
                args: [
                        seg.footprint.getEventLegacy(),
                        ev,
                        {}, // jqui dummy
                        this.view
                ]
        });
},

// DOES NOT consider overlap/constraint
computeEventDropMutation: function(startFootprint, endFootprint, eventDef) {
        var date0 = startFootprint.unzonedRange.getStart();
        var date1 = endFootprint.unzonedRange.getStart();
        var clearEnd = false;
        var forceTimed = false;
        var forceAllDay = false;
        var dateDelta;
        var dateMutation;
        var eventDefMutation;

        if (startFootprint.isAllDay !== endFootprint.isAllDay) {
                clearEnd = true;

                if (endFootprint.isAllDay) {
                        forceAllDay = true;
                        date0.stripTime();
                }
                else {
                        forceTimed = true;
                }
        }

        dateDelta = this.diffDates(date1, date0);

        dateMutation = new EventDefDateMutation();
        dateMutation.clearEnd = clearEnd;
        dateMutation.forceTimed = forceTimed;
        dateMutation.forceAllDay = forceAllDay;
        dateMutation.setDateDelta(dateDelta);

        eventDefMutation = new EventDefMutation();
        eventDefMutation.setDateMutation(dateMutation);

        return eventDefMutation;
},

// Utility for apply dragOpacity to a jQuery set
applyDragOpacity: function(els) {
        var opacity = this.opt('dragOpacity');

        if (opacity != null) {
                els.css('opacity', opacity);
        }
}

});

;;

/* Wired up via Grid.event-interation.js by calling startSegResize */ Grid.mixin({

isResizingSeg: false, // is a segment being resized? boolean

// returns boolean whether resizing actually started or not.
// assumes the seg allows resizing.
// `dragOptions` are optional.
startSegResize: function(seg, ev, dragOptions) {
        if ($(ev.target).is('.fc-resizer')) {
                this.buildSegResizeListener(seg, $(ev.target).is('.fc-start-resizer'))
                        .startInteraction(ev, dragOptions);
                return true;
        }
        return false;
},

// Creates a listener that tracks the user as they resize an event segment.
// Generic enough to work with any type of Grid.
buildSegResizeListener: function(seg, isStart) {
        var _this = this;
        var view = this.view;
        var calendar = view.calendar;
        var eventManager = calendar.eventManager;
        var el = seg.el;
        var eventDef = seg.footprint.eventDef;
        var eventInstance = seg.footprint.eventInstance;
        var isDragging;
        var resizeMutation; // zoned event date properties. falsy if invalid resize

        // Tracks mouse movement over the *grid's* coordinate map
        var dragListener = this.segResizeListener = new HitDragListener(this, {
                scroll: this.opt('dragScroll'),
                subjectEl: el,
                interactionStart: function() {
                        isDragging = false;
                },
                dragStart: function(ev) {
                        isDragging = true;
                        _this.handleSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
                        _this.segResizeStart(seg, ev);
                },
                hitOver: function(hit, isOrig, origHit) {
                        var isAllowed = true;
                        var origHitFootprint = _this.getSafeHitFootprint(origHit);
                        var hitFootprint = _this.getSafeHitFootprint(hit);
                        var mutatedEventInstanceGroup;

                        if (origHitFootprint && hitFootprint) {
                                resizeMutation = isStart ?
                                        _this.computeEventStartResizeMutation(origHitFootprint, hitFootprint, seg.footprint) :
                                        _this.computeEventEndResizeMutation(origHitFootprint, hitFootprint, seg.footprint);

                                if (resizeMutation) {
                                        mutatedEventInstanceGroup = eventManager.buildMutatedEventInstanceGroup(
                                                eventDef.id,
                                                resizeMutation
                                        );
                                        isAllowed = _this.isEventInstanceGroupAllowed(mutatedEventInstanceGroup);
                                }
                                else {
                                        isAllowed = false;
                                }
                        }
                        else {
                                isAllowed = false;
                        }

                        if (!isAllowed) {
                                resizeMutation = null;
                                disableCursor();
                        }
                        else if (resizeMutation.isEmpty()) {
                                // no change. (FYI, event dates might have zones)
                                resizeMutation = null;
                        }

                        if (resizeMutation) {
                                view.hideEventsWithId(eventDef.id);

                                _this.renderEventResize(
                                        _this.eventRangesToEventFootprints(
                                                mutatedEventInstanceGroup.sliceRenderRanges(_this.unzonedRange, calendar)
                                        ),
                                        seg
                                );
                        }
                },
                hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
                        resizeMutation = null;
                        view.showEventsWithId(eventDef.id); // for when out-of-bounds. show original
                },
                hitDone: function() { // resets the rendering to show the original event
                        _this.unrenderEventResize();
                        enableCursor();
                },
                interactionEnd: function(ev) {
                        if (isDragging) {
                                _this.segResizeStop(seg, ev);
                        }

                        if (resizeMutation) { // valid date to resize to?
                                // no need to re-show original, will rerender all anyways. esp important if eventRenderWait
                                view.reportEventResize(eventInstance, resizeMutation, el, ev);
                        }
                        else {
                                view.showEventsWithId(eventDef.id);
                        }
                        _this.segResizeListener = null;
                }
        });

        return dragListener;
},

// Called before event segment resizing starts
segResizeStart: function(seg, ev) {
        this.isResizingSeg = true;
        this.publiclyTrigger('eventResizeStart', {
                context: seg.el[0],
                args: [
                        seg.footprint.getEventLegacy(),
                        ev,
                        {}, // jqui dummy
                        this.view
                ]
        });
},

// Called after event segment resizing stops
segResizeStop: function(seg, ev) {
        this.isResizingSeg = false;
        this.publiclyTrigger('eventResizeStop', {
                context: seg.el[0],
                args: [
                        seg.footprint.getEventLegacy(),
                        ev,
                        {}, // jqui dummy
                        this.view
                ]
        });
},

// Returns new date-information for an event segment being resized from its start
computeEventStartResizeMutation: function(startFootprint, endFootprint, origEventFootprint) {
        var origRange = origEventFootprint.componentFootprint.unzonedRange;
        var startDelta = this.diffDates(
                endFootprint.unzonedRange.getStart(),
                startFootprint.unzonedRange.getStart()
        );
        var dateMutation;
        var eventDefMutation;

        if (origRange.getStart().add(startDelta) < origRange.getEnd()) {

                dateMutation = new EventDefDateMutation();
                dateMutation.setStartDelta(startDelta);

                eventDefMutation = new EventDefMutation();
                eventDefMutation.setDateMutation(dateMutation);

                return eventDefMutation;
        }

        return false;
},

// Returns new date-information for an event segment being resized from its end
computeEventEndResizeMutation: function(startFootprint, endFootprint, origEventFootprint) {
        var origRange = origEventFootprint.componentFootprint.unzonedRange;
        var endDelta = this.diffDates(
                endFootprint.unzonedRange.getEnd(),
                startFootprint.unzonedRange.getEnd()
        );
        var dateMutation;
        var eventDefMutation;

        if (origRange.getEnd().add(endDelta) > origRange.getStart()) {

                dateMutation = new EventDefDateMutation();
                dateMutation.setEndDelta(endDelta);

                eventDefMutation = new EventDefMutation();
                eventDefMutation.setDateMutation(dateMutation);

                return eventDefMutation;
        }

        return false;
},

// Renders a visual indication of an event being resized.
// Must return elements used for any mock events.
renderEventResize: function(eventFootprints, seg) {
        // subclasses must implement
},

// Unrenders a visual indication of an event being resized.
unrenderEventResize: function() {
        // subclasses must implement
}

});

;;

/* Wired up via Grid.js by calling externalDragStart */ Grid.mixin({

isDraggingExternal: false, // jqui-dragging an external element? boolean

// Called when a jQuery UI drag is initiated anywhere in the DOM
externalDragStart: function(ev, ui) {
        var el;
        var accept;

        if (this.opt('droppable')) { // only listen if this setting is on
                el = $((ui ? ui.item : null) || ev.target);

                // Test that the dragged element passes the dropAccept selector or filter function.
                // FYI, the default is "*" (matches all)
                accept = this.opt('dropAccept');
                if ($.isFunction(accept) ? accept.call(el[0], el) : el.is(accept)) {
                        if (!this.isDraggingExternal) { // prevent double-listening if fired twice
                                this.listenToExternalDrag(el, ev, ui);
                        }
                }
        }
},

// Called when a jQuery UI drag starts and it needs to be monitored for dropping
listenToExternalDrag: function(el, ev, ui) {
        var _this = this;
        var view = this.view;
        var meta = getDraggedElMeta(el); // extra data about event drop, including possible event to create
        var singleEventDef; // a null value signals an unsuccessful drag

        // listener that tracks mouse movement over date-associated pixel regions
        var dragListener = _this.externalDragListener = new HitDragListener(this, {
                interactionStart: function() {
                        _this.isDraggingExternal = true;
                },
                hitOver: function(hit) {
                        var isAllowed = true;
                        var hitFootprint = hit.component.getSafeHitFootprint(hit); // hit might not belong to this grid
                        var mutatedEventInstanceGroup;

                        if (hitFootprint) {
                                singleEventDef = _this.computeExternalDrop(hitFootprint, meta);

                                if (singleEventDef) {
                                        mutatedEventInstanceGroup = new EventInstanceGroup(
                                                singleEventDef.buildInstances()
                                        );
                                        isAllowed = meta.eventProps ? // isEvent?
                                                _this.isEventInstanceGroupAllowed(mutatedEventInstanceGroup) :
                                                _this.isExternalInstanceGroupAllowed(mutatedEventInstanceGroup);
                                }
                                else {
                                        isAllowed = false;
                                }
                        }
                        else {
                                isAllowed = false;
                        }

                        if (!isAllowed) {
                                singleEventDef = null;
                                disableCursor();
                        }

                        if (singleEventDef) {
                                _this.renderDrag( // called without a seg parameter
                                        _this.eventRangesToEventFootprints(
                                                mutatedEventInstanceGroup.sliceRenderRanges(_this.unzonedRange, view.calendar)
                                        )
                                );
                        }
                },
                hitOut: function() {
                        singleEventDef = null; // signal unsuccessful
                },
                hitDone: function() { // Called after a hitOut OR before a dragEnd
                        enableCursor();
                        _this.unrenderDrag();
                },
                interactionEnd: function(ev) {

                        if (singleEventDef) { // element was dropped on a valid hit
                                view.reportExternalDrop(
                                        singleEventDef,
                                        Boolean(meta.eventProps), // isEvent
                                        Boolean(meta.stick), // isSticky
                                        el, ev, ui
                                );
                        }

                        _this.isDraggingExternal = false;
                        _this.externalDragListener = null;
                }
        });

        dragListener.startDrag(ev); // start listening immediately
},

// Given a hit to be dropped upon, and misc data associated with the jqui drag (guaranteed to be a plain object),
// returns the zoned start/end dates for the event that would result from the hypothetical drop. end might be null.
// Returning a null value signals an invalid drop hit.
// DOES NOT consider overlap/constraint.
// Assumes both footprints are non-open-ended.
computeExternalDrop: function(componentFootprint, meta) {
        var calendar = this.view.calendar;
        var start = FC.moment.utc(componentFootprint.unzonedRange.startMs).stripZone();
        var end;
        var eventDef;

        if (componentFootprint.isAllDay) {
                // if dropped on an all-day span, and element's metadata specified a time, set it
                if (meta.startTime) {
                        start.time(meta.startTime);
                }
                else {
                        start.stripTime();
                }
        }

        if (meta.duration) {
                end = start.clone().add(meta.duration);
        }

        start = calendar.applyTimezone(start);

        if (end) {
                end = calendar.applyTimezone(end);
        }

        eventDef = SingleEventDef.parse(
                $.extend({}, meta.eventProps, {
                        start: start,
                        end: end
                }),
                new EventSource(calendar)
        );

        return eventDef;
},

// NOTE: very similar to isEventInstanceGroupAllowed
// when it's a completely anonymous external drag, no event.
isExternalInstanceGroupAllowed: function(eventInstanceGroup) {
        var calendar = this.view.calendar;
        var eventFootprints = this.eventRangesToEventFootprints(eventInstanceGroup.getAllEventRanges());
        var i;

        for (i = 0; i < eventFootprints.length; i++) {
                if (!this.view.validUnzonedRange.containsRange(eventFootprints[i].componentFootprint.unzonedRange)) {
                        return false;
                }
        }

        for (i = 0; i < eventFootprints.length; i++) {
                // treat it as a selection
                // TODO: pass in eventInstanceGroup instead
                //  because we don't want calendar's constraint system to depend on a component's
                //  determination of footprints.
                if (!calendar.isSelectionFootprintAllowed(eventFootprints[i].componentFootprint)) {
                        return false;
                }
        }

        return true;
}

});

/* External-Dragging-Element Data ———————————————————————————————————————-*/

// Require all HTML5 data-* attributes used by FullCalendar to have this prefix. // A value of '' will query attributes like data-event. A value of 'fc' will query attributes like data-fc-event. FC.dataAttrPrefix = '';

// Given a jQuery element that might represent a dragged FullCalendar event, returns an intermediate data structure // to be used for Event Object creation. // A defined `.eventProps`, even when empty, indicates that an event should be created. function getDraggedElMeta(el) {

var prefix = FC.dataAttrPrefix;
var eventProps; // properties for creating the event, not related to date/time
var startTime; // a Duration
var duration;
var stick;

if (prefix) { prefix += '-'; }
eventProps = el.data(prefix + 'event') || null;

if (eventProps) {
        if (typeof eventProps === 'object') {
                eventProps = $.extend({}, eventProps); // make a copy
        }
        else { // something like 1 or true. still signal event creation
                eventProps = {};
        }

        // pluck special-cased date/time properties
        startTime = eventProps.start;
        if (startTime == null) { startTime = eventProps.time; } // accept 'time' as well
        duration = eventProps.duration;
        stick = eventProps.stick;
        delete eventProps.start;
        delete eventProps.time;
        delete eventProps.duration;
        delete eventProps.stick;
}

// fallback to standalone attribute values for each of the date/time properties
if (startTime == null) { startTime = el.data(prefix + 'start'); }
if (startTime == null) { startTime = el.data(prefix + 'time'); } // accept 'time' as well
if (duration == null) { duration = el.data(prefix + 'duration'); }
if (stick == null) { stick = el.data(prefix + 'stick'); }

// massage into correct data types
startTime = startTime != null ? moment.duration(startTime) : null;
duration = duration != null ? moment.duration(duration) : null;
stick = Boolean(stick);

return { eventProps: eventProps, startTime: startTime, duration: duration, stick: stick };

}

;;

Grid.mixin({

/* Fill System (highlight, background events, business hours)
--------------------------------------------------------------------------------------------------------------------
TODO: remove this system. like we did in TimeGrid
*/

elsByFill: null, // a hash of jQuery element sets used for rendering each fill. Keyed by fill name.

initFillInternals: function() {
        this.elsByFill = {};
},

// Renders a set of rectangles over the given segments of time.
// MUST RETURN a subset of segs, the segs that were actually rendered.
// Responsible for populating this.elsByFill. TODO: better API for expressing this requirement
renderFill: function(type, segs) {
        // subclasses must implement
},

// Unrenders a specific type of fill that is currently rendered on the grid
unrenderFill: function(type) {
        var el = this.elsByFill[type];

        if (el) {
                el.remove();
                delete this.elsByFill[type];
        }
},

// Renders and assigns an `el` property for each fill segment. Generic enough to work with different types.
// Only returns segments that successfully rendered.
// To be harnessed by renderFill (implemented by subclasses).
// Analagous to renderFgSegEls.
renderFillSegEls: function(type, segs) {
        var _this = this;
        var segElMethod = this[type + 'SegEl'];
        var html = '';
        var renderedSegs = [];
        var i;

        if (segs.length) {

                // build a large concatenation of segment HTML
                for (i = 0; i < segs.length; i++) {
                        html += this.fillSegHtml(type, segs[i]);
                }

                // Grab individual elements from the combined HTML string. Use each as the default rendering.
                // Then, compute the 'el' for each segment.
                $(html).each(function(i, node) {
                        var seg = segs[i];
                        var el = $(node);

                        // allow custom filter methods per-type
                        if (segElMethod) {
                                el = segElMethod.call(_this, seg, el);
                        }

                        if (el) { // custom filters did not cancel the render
                                el = $(el); // allow custom filter to return raw DOM node

                                // correct element type? (would be bad if a non-TD were inserted into a table for example)
                                if (el.is(_this.fillSegTag)) {
                                        seg.el = el;
                                        renderedSegs.push(seg);
                                }
                        }
                });
        }

        return renderedSegs;
},

fillSegTag: 'div', // subclasses can override

// Builds the HTML needed for one fill segment. Generic enough to work with different types.
fillSegHtml: function(type, seg) {

        // custom hooks per-type
        var classesMethod = this[type + 'SegClasses'];
        var cssMethod = this[type + 'SegCss'];

        var classes = classesMethod ? classesMethod.call(this, seg) : [];
        var css = cssToStr(cssMethod ? cssMethod.call(this, seg) : {});

        return '<' + this.fillSegTag +
                (classes.length ? ' class="' + classes.join(' ') + '"' : '') +
                (css ? ' style="' + css + '"' : '') +
                ' />';
},

// Generates an array of classNames for rendering the highlight. Used by the fill system.
highlightSegClasses: function() {
        return [ 'fc-highlight' ];
}

});

;;

/* A set of rendering and date-related methods for a visual component comprised of one or more rows of day columns. Prerequisite: the object being mixed into needs to be a Grid */ var DayTableMixin = FC.DayTableMixin = {

breakOnWeeks: false, // should create a new row for each week?
dayDates: null, // whole-day dates for each column. left to right
dayIndices: null, // for each day from start, the offset
daysPerRow: null,
rowCnt: null,
colCnt: null,
colHeadFormat: null,

// Populates internal variables used for date calculation and rendering
updateDayTable: function() {
        var view = this.view;
        var calendar = view.calendar;
        var date = calendar.msToUtcMoment(this.unzonedRange.startMs, true);
        var end = calendar.msToUtcMoment(this.unzonedRange.endMs, true);
        var dayIndex = -1;
        var dayIndices = [];
        var dayDates = [];
        var daysPerRow;
        var firstDay;
        var rowCnt;

        while (date.isBefore(end)) { // loop each day from start to end
                if (view.isHiddenDay(date)) {
                        dayIndices.push(dayIndex + 0.5); // mark that it's between indices
                }
                else {
                        dayIndex++;
                        dayIndices.push(dayIndex);
                        dayDates.push(date.clone());
                }
                date.add(1, 'days');
        }

        if (this.breakOnWeeks) {
                // count columns until the day-of-week repeats
                firstDay = dayDates[0].day();
                for (daysPerRow = 1; daysPerRow < dayDates.length; daysPerRow++) {
                        if (dayDates[daysPerRow].day() == firstDay) {
                                break;
                        }
                }
                rowCnt = Math.ceil(dayDates.length / daysPerRow);
        }
        else {
                rowCnt = 1;
                daysPerRow = dayDates.length;
        }

        this.dayDates = dayDates;
        this.dayIndices = dayIndices;
        this.daysPerRow = daysPerRow;
        this.rowCnt = rowCnt;

        this.updateDayTableCols();
},

// Computes and assigned the colCnt property and updates any options that may be computed from it
updateDayTableCols: function() {
        this.colCnt = this.computeColCnt();
        this.colHeadFormat = this.opt('columnFormat') || this.computeColHeadFormat();
},

// Determines how many columns there should be in the table
computeColCnt: function() {
        return this.daysPerRow;
},

// Computes the ambiguously-timed moment for the given cell
getCellDate: function(row, col) {
        return this.dayDates[
                        this.getCellDayIndex(row, col)
                ].clone();
},

// Computes the ambiguously-timed date range for the given cell
getCellRange: function(row, col) {
        var start = this.getCellDate(row, col);
        var end = start.clone().add(1, 'days');

        return { start: start, end: end };
},

// Returns the number of day cells, chronologically, from the first of the grid (0-based)
getCellDayIndex: function(row, col) {
        return row * this.daysPerRow + this.getColDayIndex(col);
},

// Returns the numner of day cells, chronologically, from the first cell in *any given row*
getColDayIndex: function(col) {
        if (this.isRTL) {
                return this.colCnt - 1 - col;
        }
        else {
                return col;
        }
},

// Given a date, returns its chronolocial cell-index from the first cell of the grid.
// If the date lies between cells (because of hiddenDays), returns a floating-point value between offsets.
// If before the first offset, returns a negative number.
// If after the last offset, returns an offset past the last cell offset.
// Only works for *start* dates of cells. Will not work for exclusive end dates for cells.
getDateDayIndex: function(date) {
        var dayIndices = this.dayIndices;
        var dayOffset = date.diff(this.dayDates[0], 'days');

        if (dayOffset < 0) {
                return dayIndices[0] - 1;
        }
        else if (dayOffset >= dayIndices.length) {
                return dayIndices[dayIndices.length - 1] + 1;
        }
        else {
                return dayIndices[dayOffset];
        }
},

/* Options
------------------------------------------------------------------------------------------------------------------*/

// Computes a default column header formatting string if `colFormat` is not explicitly defined
computeColHeadFormat: function() {
        // if more than one week row, or if there are a lot of columns with not much space,
        // put just the day numbers will be in each cell
        if (this.rowCnt > 1 || this.colCnt > 10) {
                return 'ddd'; // "Sat"
        }
        // multiple days, so full single date string WON'T be in title text
        else if (this.colCnt > 1) {
                return this.opt('dayOfMonthFormat'); // "Sat 12/10"
        }
        // single day, so full single date string will probably be in title text
        else {
                return 'dddd'; // "Saturday"
        }
},

/* Slicing
------------------------------------------------------------------------------------------------------------------*/

// Slices up a date range into a segment for every week-row it intersects with
sliceRangeByRow: function(unzonedRange) {
        var daysPerRow = this.daysPerRow;
        var normalRange = this.view.computeDayRange(unzonedRange); // make whole-day range, considering nextDayThreshold
        var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
        var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
        var segs = [];
        var row;
        var rowFirst, rowLast; // inclusive day-index range for current row
        var segFirst, segLast; // inclusive day-index range for segment

        for (row = 0; row < this.rowCnt; row++) {
                rowFirst = row * daysPerRow;
                rowLast = rowFirst + daysPerRow - 1;

                // intersect segment's offset range with the row's
                segFirst = Math.max(rangeFirst, rowFirst);
                segLast = Math.min(rangeLast, rowLast);

                // deal with in-between indices
                segFirst = Math.ceil(segFirst); // in-between starts round to next cell
                segLast = Math.floor(segLast); // in-between ends round to prev cell

                if (segFirst <= segLast) { // was there any intersection with the current row?
                        segs.push({
                                row: row,

                                // normalize to start of row
                                firstRowDayIndex: segFirst - rowFirst,
                                lastRowDayIndex: segLast - rowFirst,

                                // must be matching integers to be the segment's start/end
                                isStart: segFirst === rangeFirst,
                                isEnd: segLast === rangeLast
                        });
                }
        }

        return segs;
},

// Slices up a date range into a segment for every day-cell it intersects with.
// TODO: make more DRY with sliceRangeByRow somehow.
sliceRangeByDay: function(unzonedRange) {
        var daysPerRow = this.daysPerRow;
        var normalRange = this.view.computeDayRange(unzonedRange); // make whole-day range, considering nextDayThreshold
        var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
        var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
        var segs = [];
        var row;
        var rowFirst, rowLast; // inclusive day-index range for current row
        var i;
        var segFirst, segLast; // inclusive day-index range for segment

        for (row = 0; row < this.rowCnt; row++) {
                rowFirst = row * daysPerRow;
                rowLast = rowFirst + daysPerRow - 1;

                for (i = rowFirst; i <= rowLast; i++) {

                        // intersect segment's offset range with the row's
                        segFirst = Math.max(rangeFirst, i);
                        segLast = Math.min(rangeLast, i);

                        // deal with in-between indices
                        segFirst = Math.ceil(segFirst); // in-between starts round to next cell
                        segLast = Math.floor(segLast); // in-between ends round to prev cell

                        if (segFirst <= segLast) { // was there any intersection with the current row?
                                segs.push({
                                        row: row,

                                        // normalize to start of row
                                        firstRowDayIndex: segFirst - rowFirst,
                                        lastRowDayIndex: segLast - rowFirst,

                                        // must be matching integers to be the segment's start/end
                                        isStart: segFirst === rangeFirst,
                                        isEnd: segLast === rangeLast
                                });
                        }
                }
        }

        return segs;
},

/* Header Rendering
------------------------------------------------------------------------------------------------------------------*/

renderHeadHtml: function() {
        var theme = this.view.calendar.theme;

        return '' +
                '<div class="fc-row ' + theme.getClass('headerRow') + '">' +
                        '<table class="' + theme.getClass('tableGrid') + '">' +
                                '<thead>' +
                                        this.renderHeadTrHtml() +
                                '</thead>' +
                        '</table>' +
                '</div>';
},

renderHeadIntroHtml: function() {
        return this.renderIntroHtml(); // fall back to generic
},

renderHeadTrHtml: function() {
        return '' +
                '<tr>' +
                        (this.isRTL ? '' : this.renderHeadIntroHtml()) +
                        this.renderHeadDateCellsHtml() +
                        (this.isRTL ? this.renderHeadIntroHtml() : '') +
                '</tr>';
},

renderHeadDateCellsHtml: function() {
        var htmls = [];
        var col, date;

        for (col = 0; col < this.colCnt; col++) {
                date = this.getCellDate(0, col);
                htmls.push(this.renderHeadDateCellHtml(date));
        }

        return htmls.join('');
},

// TODO: when internalApiVersion, accept an object for HTML attributes
// (colspan should be no different)
renderHeadDateCellHtml: function(date, colspan, otherAttrs) {
        var view = this.view;
        var isDateValid = view.activeUnzonedRange.containsDate(date); // TODO: called too frequently. cache somehow.
        var classNames = [
                'fc-day-header',
                view.calendar.theme.getClass('widgetHeader')
        ];
        var innerHtml = htmlEscape(date.format(this.colHeadFormat));

        // if only one row of days, the classNames on the header can represent the specific days beneath
        if (this.rowCnt === 1) {
                classNames = classNames.concat(
                        // includes the day-of-week class
                        // noThemeHighlight=true (don't highlight the header)
                        this.getDayClasses(date, true)
                );
        }
        else {
                classNames.push('fc-' + dayIDs[date.day()]); // only add the day-of-week class
        }

        return '' +
    '<th class="' + classNames.join(' ') + '"' +
                        ((isDateValid && this.rowCnt) === 1 ?
                                ' data-date="' + date.format('YYYY-MM-DD') + '"' :
                                '') +
                        (colspan > 1 ?
                                ' colspan="' + colspan + '"' :
                                '') +
                        (otherAttrs ?
                                ' ' + otherAttrs :
                                '') +
                        '>' +
                        (isDateValid ?
                                // don't make a link if the heading could represent multiple days, or if there's only one day (forceOff)
                                view.buildGotoAnchorHtml(
                                        { date: date, forceOff: this.rowCnt > 1 || this.colCnt === 1 },
                                        innerHtml
                                ) :
                                // if not valid, display text, but no link
                                innerHtml
                        ) +
                '</th>';
},

/* Background Rendering
------------------------------------------------------------------------------------------------------------------*/

renderBgTrHtml: function(row) {
        return '' +
                '<tr>' +
                        (this.isRTL ? '' : this.renderBgIntroHtml(row)) +
                        this.renderBgCellsHtml(row) +
                        (this.isRTL ? this.renderBgIntroHtml(row) : '') +
                '</tr>';
},

renderBgIntroHtml: function(row) {
        return this.renderIntroHtml(); // fall back to generic
},

renderBgCellsHtml: function(row) {
        var htmls = [];
        var col, date;

        for (col = 0; col < this.colCnt; col++) {
                date = this.getCellDate(row, col);
                htmls.push(this.renderBgCellHtml(date));
        }

        return htmls.join('');
},

renderBgCellHtml: function(date, otherAttrs) {
        var view = this.view;
        var isDateValid = view.activeUnzonedRange.containsDate(date); // TODO: called too frequently. cache somehow.
        var classes = this.getDayClasses(date);

        classes.unshift('fc-day', view.calendar.theme.getClass('widgetContent'));

        return '<td class="' + classes.join(' ') + '"' +
                (isDateValid ?
                        ' data-date="' + date.format('YYYY-MM-DD') + '"' : // if date has a time, won't format it
                        '') +
                (otherAttrs ?
                        ' ' + otherAttrs :
                        '') +
                '></td>';
},

/* Generic
------------------------------------------------------------------------------------------------------------------*/

// Generates the default HTML intro for any row. User classes should override
renderIntroHtml: function() {
},

// TODO: a generic method for dealing with <tr>, RTL, intro
// when increment internalApiVersion
// wrapTr (scheduler)

/* Utils
------------------------------------------------------------------------------------------------------------------*/

// Applies the generic "intro" and "outro" HTML to the given cells.
// Intro means the leftmost cell when the calendar is LTR and the rightmost cell when RTL. Vice-versa for outro.
bookendCells: function(trEl) {
        var introHtml = this.renderIntroHtml();

        if (introHtml) {
                if (this.isRTL) {
                        trEl.append(introHtml);
                }
                else {
                        trEl.prepend(introHtml);
                }
        }
}

};

;;

/* A component that renders a grid of whole-days that runs horizontally. There can be multiple rows, one per week. ———————————————————————————————————————-*/

var DayGrid = FC.DayGrid = Grid.extend(DayTableMixin, {

numbersVisible: false, // should render a row for day/week numbers? set by outside view. TODO: make internal
bottomCoordPadding: 0, // hack for extending the hit area for the last row of the coordinate grid

rowEls: null, // set of fake row elements
cellEls: null, // set of whole-day elements comprising the row's background
helperEls: null, // set of cell skeleton elements for rendering the mock event "helper"

rowCoordCache: null,
colCoordCache: null,

// Renders the rows and columns into the component's `this.el`, which should already be assigned.
// isRigid determins whether the individual rows should ignore the contents and be a constant height.
// Relies on the view's colCnt and rowCnt. In the future, this component should probably be self-sufficient.
renderDates: function(isRigid) {
        var view = this.view;
        var rowCnt = this.rowCnt;
        var colCnt = this.colCnt;
        var html = '';
        var row;
        var col;

        for (row = 0; row < rowCnt; row++) {
                html += this.renderDayRowHtml(row, isRigid);
        }
        this.el.html(html);

        this.rowEls = this.el.find('.fc-row');
        this.cellEls = this.el.find('.fc-day, .fc-disabled-day');

        this.rowCoordCache = new CoordCache({
                els: this.rowEls,
                isVertical: true
        });
        this.colCoordCache = new CoordCache({
                els: this.cellEls.slice(0, this.colCnt), // only the first row
                isHorizontal: true
        });

        // trigger dayRender with each cell's element
        for (row = 0; row < rowCnt; row++) {
                for (col = 0; col < colCnt; col++) {
                        this.publiclyTrigger('dayRender', {
                                context: view,
                                args: [
                                        this.getCellDate(row, col),
                                        this.getCellEl(row, col),
                                        view
                                ]
                        });
                }
        }
},

unrenderDates: function() {
        this.removeSegPopover();
},

renderBusinessHours: function() {
        var segs = this.buildBusinessHourSegs(true); // wholeDay=true
        this.renderFill('businessHours', segs, 'bgevent');
},

unrenderBusinessHours: function() {
        this.unrenderFill('businessHours');
},

// Generates the HTML for a single row, which is a div that wraps a table.
// `row` is the row number.
renderDayRowHtml: function(row, isRigid) {
        var theme = this.view.calendar.theme;
        var classes = [ 'fc-row', 'fc-week', theme.getClass('dayRow') ];

        if (isRigid) {
                classes.push('fc-rigid');
        }

        return '' +
                '<div class="' + classes.join(' ') + '">' +
                        '<div class="fc-bg">' +
                                '<table class="' + theme.getClass('tableGrid') + '">' +
                                        this.renderBgTrHtml(row) +
                                '</table>' +
                        '</div>' +
                        '<div class="fc-content-skeleton">' +
                                '<table>' +
                                        (this.numbersVisible ?
                                                '<thead>' +
                                                        this.renderNumberTrHtml(row) +
                                                '</thead>' :
                                                ''
                                                ) +
                                '</table>' +
                        '</div>' +
                '</div>';
},

/* Grid Number Rendering
------------------------------------------------------------------------------------------------------------------*/

renderNumberTrHtml: function(row) {
        return '' +
                '<tr>' +
                        (this.isRTL ? '' : this.renderNumberIntroHtml(row)) +
                        this.renderNumberCellsHtml(row) +
                        (this.isRTL ? this.renderNumberIntroHtml(row) : '') +
                '</tr>';
},

renderNumberIntroHtml: function(row) {
        return this.renderIntroHtml();
},

renderNumberCellsHtml: function(row) {
        var htmls = [];
        var col, date;

        for (col = 0; col < this.colCnt; col++) {
                date = this.getCellDate(row, col);
                htmls.push(this.renderNumberCellHtml(date));
        }

        return htmls.join('');
},

// Generates the HTML for the <td>s of the "number" row in the DayGrid's content skeleton.
// The number row will only exist if either day numbers or week numbers are turned on.
renderNumberCellHtml: function(date) {
        var view = this.view;
        var html = '';
        var isDateValid = view.activeUnzonedRange.containsDate(date); // TODO: called too frequently. cache somehow.
        var isDayNumberVisible = view.dayNumbersVisible && isDateValid;
        var classes;
        var weekCalcFirstDoW;

        if (!isDayNumberVisible && !view.cellWeekNumbersVisible) {
                // no numbers in day cell (week number must be along the side)
                return '<td/>'; //  will create an empty space above events :(
        }

        classes = this.getDayClasses(date);
        classes.unshift('fc-day-top');

        if (view.cellWeekNumbersVisible) {
                // To determine the day of week number change under ISO, we cannot
                // rely on moment.js methods such as firstDayOfWeek() or weekday(),
                // because they rely on the locale's dow (possibly overridden by
                // our firstDay option), which may not be Monday. We cannot change
                // dow, because that would affect the calendar start day as well.
                if (date._locale._fullCalendar_weekCalc === 'ISO') {
                        weekCalcFirstDoW = 1;  // Monday by ISO 8601 definition
                }
                else {
                        weekCalcFirstDoW = date._locale.firstDayOfWeek();
                }
        }

        html += '<td class="' + classes.join(' ') + '"' +
                (isDateValid ?
                        ' data-date="' + date.format() + '"' :
                        ''
                        ) +
                '>';

        if (view.cellWeekNumbersVisible && (date.day() == weekCalcFirstDoW)) {
                html += view.buildGotoAnchorHtml(
                        { date: date, type: 'week' },
                        { 'class': 'fc-week-number' },
                        date.format('w') // inner HTML
                );
        }

        if (isDayNumberVisible) {
                html += view.buildGotoAnchorHtml(
                        date,
                        { 'class': 'fc-day-number' },
                        date.date() // inner HTML
                );
        }

        html += '</td>';

        return html;
},

/* Options
------------------------------------------------------------------------------------------------------------------*/

// Computes a default event time formatting string if `timeFormat` is not explicitly defined
computeEventTimeFormat: function() {
        return this.opt('extraSmallTimeFormat'); // like "6p" or "6:30p"
},

// Computes a default `displayEventEnd` value if one is not expliclty defined
computeDisplayEventEnd: function() {
        return this.colCnt == 1; // we'll likely have space if there's only one day
},

/* Dates
------------------------------------------------------------------------------------------------------------------*/

rangeUpdated: function() {
        this.updateDayTable();
},

// Slices up the given span (unzoned start/end with other misc data) into an array of segments
componentFootprintToSegs: function(componentFootprint) {
        var segs = this.sliceRangeByRow(componentFootprint.unzonedRange);
        var i, seg;

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];

                if (this.isRTL) {
                        seg.leftCol = this.daysPerRow - 1 - seg.lastRowDayIndex;
                        seg.rightCol = this.daysPerRow - 1 - seg.firstRowDayIndex;
                }
                else {
                        seg.leftCol = seg.firstRowDayIndex;
                        seg.rightCol = seg.lastRowDayIndex;
                }
        }

        return segs;
},

/* Hit System
------------------------------------------------------------------------------------------------------------------*/

prepareHits: function() {
        this.colCoordCache.build();
        this.rowCoordCache.build();
        this.rowCoordCache.bottoms[this.rowCnt - 1] += this.bottomCoordPadding; // hack
},

releaseHits: function() {
        this.colCoordCache.clear();
        this.rowCoordCache.clear();
},

queryHit: function(leftOffset, topOffset) {
        if (this.colCoordCache.isLeftInBounds(leftOffset) && this.rowCoordCache.isTopInBounds(topOffset)) {
                var col = this.colCoordCache.getHorizontalIndex(leftOffset);
                var row = this.rowCoordCache.getVerticalIndex(topOffset);

                if (row != null && col != null) {
                        return this.getCellHit(row, col);
                }
        }
},

getHitFootprint: function(hit) {
        var range = this.getCellRange(hit.row, hit.col);

        return new ComponentFootprint(
                new UnzonedRange(range.start, range.end),
                true // all-day?
        );
},

getHitEl: function(hit) {
        return this.getCellEl(hit.row, hit.col);
},

/* Cell System
------------------------------------------------------------------------------------------------------------------*/
// FYI: the first column is the leftmost column, regardless of date

getCellHit: function(row, col) {
        return {
                row: row,
                col: col,
                component: this, // needed unfortunately :(
                left: this.colCoordCache.getLeftOffset(col),
                right: this.colCoordCache.getRightOffset(col),
                top: this.rowCoordCache.getTopOffset(row),
                bottom: this.rowCoordCache.getBottomOffset(row)
        };
},

getCellEl: function(row, col) {
        return this.cellEls.eq(row * this.colCnt + col);
},

/* Event Drag Visualization
------------------------------------------------------------------------------------------------------------------*/
// TODO: move to DayGrid.event, similar to what we did with Grid's drag methods

// Renders a visual indication of an event or external element being dragged.
// `eventLocation` has zoned start and end (optional)
renderDrag: function(eventFootprints, seg) {
        var i;

        for (i = 0; i < eventFootprints.length; i++) {
                this.renderHighlight(eventFootprints[i].componentFootprint);
        }

        // if a segment from the same calendar but another component is being dragged, render a helper event
        if (seg && seg.component !== this) {
                return this.renderHelperEventFootprints(eventFootprints, seg); // returns mock event elements
        }
},

// Unrenders any visual indication of a hovering event
unrenderDrag: function() {
        this.unrenderHighlight();
        this.unrenderHelper();
},

/* Event Resize Visualization
------------------------------------------------------------------------------------------------------------------*/

// Renders a visual indication of an event being resized
renderEventResize: function(eventFootprints, seg) {
        var i;

        for (i = 0; i < eventFootprints.length; i++) {
                this.renderHighlight(eventFootprints[i].componentFootprint);
        }

        return this.renderHelperEventFootprints(eventFootprints, seg); // returns mock event elements
},

// Unrenders a visual indication of an event being resized
unrenderEventResize: function() {
        this.unrenderHighlight();
        this.unrenderHelper();
},

/* Event Helper
------------------------------------------------------------------------------------------------------------------*/

// Renders a mock "helper" event. `sourceSeg` is the associated internal segment object. It can be null.
renderHelperEventFootprintEls: function(eventFootprints, sourceSeg) {
        var helperNodes = [];
        var segs = this.eventFootprintsToSegs(eventFootprints);
        var rowStructs;

        segs = this.renderFgSegEls(segs); // assigns each seg's el and returns a subset of segs that were rendered
        rowStructs = this.renderSegRows(segs);

        // inject each new event skeleton into each associated row
        this.rowEls.each(function(row, rowNode) {
                var rowEl = $(rowNode); // the .fc-row
                var skeletonEl = $('<div class="fc-helper-skeleton"><table/></div>'); // will be absolutely positioned
                var skeletonTop;

                // If there is an original segment, match the top position. Otherwise, put it at the row's top level
                if (sourceSeg && sourceSeg.row === row) {
                        skeletonTop = sourceSeg.el.position().top;
                }
                else {
                        skeletonTop = rowEl.find('.fc-content-skeleton tbody').position().top;
                }

                skeletonEl.css('top', skeletonTop)
                        .find('table')
                                .append(rowStructs[row].tbodyEl);

                rowEl.append(skeletonEl);
                helperNodes.push(skeletonEl[0]);
        });

        return ( // must return the elements rendered
                this.helperEls = $(helperNodes) // array -> jQuery set
        );
},

// Unrenders any visual indication of a mock helper event
unrenderHelper: function() {
        if (this.helperEls) {
                this.helperEls.remove();
                this.helperEls = null;
        }
},

/* Fill System (highlight, background events, business hours)
------------------------------------------------------------------------------------------------------------------*/

fillSegTag: 'td', // override the default tag name

// Renders a set of rectangles over the given segments of days.
// Only returns segments that successfully rendered.
renderFill: function(type, segs, className) {
        var nodes = [];
        var i, seg;
        var skeletonEl;

        segs = this.renderFillSegEls(type, segs); // assignes `.el` to each seg. returns successfully rendered segs

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                skeletonEl = this.renderFillRow(type, seg, className);
                this.rowEls.eq(seg.row).append(skeletonEl);
                nodes.push(skeletonEl[0]);
        }

        if (this.elsByFill[type]) {
                this.elsByFill[type] = this.elsByFill[type].add(nodes);
        }
        else {
                this.elsByFill[type] = $(nodes);
        }

        return segs;
},

// Generates the HTML needed for one row of a fill. Requires the seg's el to be rendered.
renderFillRow: function(type, seg, className) {
        var colCnt = this.colCnt;
        var startCol = seg.leftCol;
        var endCol = seg.rightCol + 1;
        var skeletonEl;
        var trEl;

        className = className || type.toLowerCase();

        skeletonEl = $(
                '<div class="fc-' + className + '-skeleton">' +
                        '<table><tr/></table>' +
                '</div>'
        );
        trEl = skeletonEl.find('tr');

        if (startCol > 0) {
                trEl.append('<td colspan="' + startCol + '"/>');
        }

        trEl.append(
                seg.el.attr('colspan', endCol - startCol)
        );

        if (endCol < colCnt) {
                trEl.append('<td colspan="' + (colCnt - endCol) + '"/>');
        }

        this.bookendCells(trEl);

        return skeletonEl;
}

});

;;

/* Event-rendering methods for the DayGrid class ———————————————————————————————————————-*/

DayGrid.mixin({

rowStructs: null, // an array of objects, each holding information about a row's foreground event-rendering

// Unrenders all events currently rendered on the grid
unrenderEvents: function() {
        this.removeSegPopover(); // removes the "more.." events popover
        Grid.prototype.unrenderEvents.apply(this, arguments); // calls the super-method
},

// Retrieves all rendered segment objects currently rendered on the grid
getEventSegs: function() {
        return Grid.prototype.getEventSegs.call(this) // get the segments from the super-method
                .concat(this.popoverSegs || []); // append the segments from the "more..." popover
},

// Renders the given background event segments onto the grid
renderBgSegs: function(segs) {

        // don't render timed background events
        var allDaySegs = $.grep(segs, function(seg) {
                return seg.footprint.componentFootprint.isAllDay;
        });

        return Grid.prototype.renderBgSegs.call(this, allDaySegs); // call the super-method
},

// Renders the given foreground event segments onto the grid
renderFgSegs: function(segs) {
        var rowStructs;

        // render an `.el` on each seg
        // returns a subset of the segs. segs that were actually rendered
        segs = this.renderFgSegEls(segs);

        rowStructs = this.rowStructs = this.renderSegRows(segs);

        // append to each row's content skeleton
        this.rowEls.each(function(i, rowNode) {
                $(rowNode).find('.fc-content-skeleton > table').append(
                        rowStructs[i].tbodyEl
                );
        });

        return segs; // return only the segs that were actually rendered
},

// Unrenders all currently rendered foreground event segments
unrenderFgSegs: function() {
        var rowStructs = this.rowStructs || [];
        var rowStruct;

        while ((rowStruct = rowStructs.pop())) {
                rowStruct.tbodyEl.remove();
        }

        this.rowStructs = null;
},

// Uses the given events array to generate <tbody> elements that should be appended to each row's content skeleton.
// Returns an array of rowStruct objects (see the bottom of `renderSegRow`).
// PRECONDITION: each segment shoud already have a rendered and assigned `.el`
renderSegRows: function(segs) {
        var rowStructs = [];
        var segRows;
        var row;

        segRows = this.groupSegRows(segs); // group into nested arrays

        // iterate each row of segment groupings
        for (row = 0; row < segRows.length; row++) {
                rowStructs.push(
                        this.renderSegRow(row, segRows[row])
                );
        }

        return rowStructs;
},

// Builds the HTML to be used for the default element for an individual segment
fgSegHtml: function(seg, disableResizing) {
        var view = this.view;
        var eventDef = seg.footprint.eventDef;
        var isAllDay = seg.footprint.componentFootprint.isAllDay;
        var isDraggable = view.isEventDefDraggable(eventDef);
        var isResizableFromStart = !disableResizing && isAllDay &&
                seg.isStart && view.isEventDefResizableFromStart(eventDef);
        var isResizableFromEnd = !disableResizing && isAllDay &&
                seg.isEnd && view.isEventDefResizableFromEnd(eventDef);
        var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
        var skinCss = cssToStr(this.getSegSkinCss(seg));
        var timeHtml = '';
        var timeText;
        var titleHtml;

        classes.unshift('fc-day-grid-event', 'fc-h-event');

        // Only display a timed events time if it is the starting segment
        if (seg.isStart) {
                timeText = this.getEventTimeText(seg.footprint);
                if (timeText) {
                        timeHtml = '<span class="fc-time">' + htmlEscape(timeText) + '</span>';
                }
        }

        titleHtml =
                '<span class="fc-title">' +
                        (htmlEscape(eventDef.title || '') || '&nbsp;') + // we always want one line of height
                '</span>';

        return '<a class="' + classes.join(' ') + '"' +
                        (eventDef.url ?
                                ' href="' + htmlEscape(eventDef.url) + '"' :
                                ''
                                ) +
                        (skinCss ?
                                ' style="' + skinCss + '"' :
                                ''
                                ) +
                '>' +
                        '<div class="fc-content">' +
                                (this.isRTL ?
                                        titleHtml + ' ' + timeHtml : // put a natural space in between
                                        timeHtml + ' ' + titleHtml   //
                                        ) +
                        '</div>' +
                        (isResizableFromStart ?
                                '<div class="fc-resizer fc-start-resizer" />' :
                                ''
                                ) +
                        (isResizableFromEnd ?
                                '<div class="fc-resizer fc-end-resizer" />' :
                                ''
                                ) +
                '</a>';
},

// Given a row # and an array of segments all in the same row, render a <tbody> element, a skeleton that contains
// the segments. Returns object with a bunch of internal data about how the render was calculated.
// NOTE: modifies rowSegs
renderSegRow: function(row, rowSegs) {
        var colCnt = this.colCnt;
        var segLevels = this.buildSegLevels(rowSegs); // group into sub-arrays of levels
        var levelCnt = Math.max(1, segLevels.length); // ensure at least one level
        var tbody = $('<tbody/>');
        var segMatrix = []; // lookup for which segments are rendered into which level+col cells
        var cellMatrix = []; // lookup for all <td> elements of the level+col matrix
        var loneCellMatrix = []; // lookup for <td> elements that only take up a single column
        var i, levelSegs;
        var col;
        var tr;
        var j, seg;
        var td;

        // populates empty cells from the current column (`col`) to `endCol`
        function emptyCellsUntil(endCol) {
                while (col < endCol) {
                        // try to grab a cell from the level above and extend its rowspan. otherwise, create a fresh cell
                        td = (loneCellMatrix[i - 1] || [])[col];
                        if (td) {
                                td.attr(
                                        'rowspan',
                                        parseInt(td.attr('rowspan') || 1, 10) + 1
                                );
                        }
                        else {
                                td = $('<td/>');
                                tr.append(td);
                        }
                        cellMatrix[i][col] = td;
                        loneCellMatrix[i][col] = td;
                        col++;
                }
        }

        for (i = 0; i < levelCnt; i++) { // iterate through all levels
                levelSegs = segLevels[i];
                col = 0;
                tr = $('<tr/>');

                segMatrix.push([]);
                cellMatrix.push([]);
                loneCellMatrix.push([]);

                // levelCnt might be 1 even though there are no actual levels. protect against this.
                // this single empty row is useful for styling.
                if (levelSegs) {
                        for (j = 0; j < levelSegs.length; j++) { // iterate through segments in level
                                seg = levelSegs[j];

                                emptyCellsUntil(seg.leftCol);

                                // create a container that occupies or more columns. append the event element.
                                td = $('<td class="fc-event-container"/>').append(seg.el);
                                if (seg.leftCol != seg.rightCol) {
                                        td.attr('colspan', seg.rightCol - seg.leftCol + 1);
                                }
                                else { // a single-column segment
                                        loneCellMatrix[i][col] = td;
                                }

                                while (col <= seg.rightCol) {
                                        cellMatrix[i][col] = td;
                                        segMatrix[i][col] = seg;
                                        col++;
                                }

                                tr.append(td);
                        }
                }

                emptyCellsUntil(colCnt); // finish off the row
                this.bookendCells(tr);
                tbody.append(tr);
        }

        return { // a "rowStruct"
                row: row, // the row number
                tbodyEl: tbody,
                cellMatrix: cellMatrix,
                segMatrix: segMatrix,
                segLevels: segLevels,
                segs: rowSegs
        };
},

// Stacks a flat array of segments, which are all assumed to be in the same row, into subarrays of vertical levels.
// NOTE: modifies segs
buildSegLevels: function(segs) {
        var levels = [];
        var i, seg;
        var j;

        // Give preference to elements with certain criteria, so they have
        // a chance to be closer to the top.
        this.sortEventSegs(segs);

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];

                // loop through levels, starting with the topmost, until the segment doesn't collide with other segments
                for (j = 0; j < levels.length; j++) {
                        if (!isDaySegCollision(seg, levels[j])) {
                                break;
                        }
                }
                // `j` now holds the desired subrow index
                seg.level = j;

                // create new level array if needed and append segment
                (levels[j] || (levels[j] = [])).push(seg);
        }

        // order segments left-to-right. very important if calendar is RTL
        for (j = 0; j < levels.length; j++) {
                levels[j].sort(compareDaySegCols);
        }

        return levels;
},

// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's row
groupSegRows: function(segs) {
        var segRows = [];
        var i;

        for (i = 0; i < this.rowCnt; i++) {
                segRows.push([]);
        }

        for (i = 0; i < segs.length; i++) {
                segRows[segs[i].row].push(segs[i]);
        }

        return segRows;
}

});

// Computes whether two segments' columns collide. They are assumed to be in the same row. function isDaySegCollision(seg, otherSegs) {

var i, otherSeg;

for (i = 0; i < otherSegs.length; i++) {
        otherSeg = otherSegs[i];

        if (
                otherSeg.leftCol <= seg.rightCol &&
                otherSeg.rightCol >= seg.leftCol
        ) {
                return true;
        }
}

return false;

}

// A cmp function for determining the leftmost event function compareDaySegCols(a, b) {

return a.leftCol - b.leftCol;

}

;;

/* Methods relate to limiting the number events for a given day on a DayGrid ———————————————————————————————————————-*/ // NOTE: all the segs being passed around in here are foreground segs

DayGrid.mixin({

segPopover: null, // the Popover that holds events that can't fit in a cell. null when not visible
popoverSegs: null, // an array of segment objects that the segPopover holds. null when not visible

removeSegPopover: function() {
        if (this.segPopover) {
                this.segPopover.hide(); // in handler, will call segPopover's removeElement
        }
},

// Limits the number of "levels" (vertically stacking layers of events) for each row of the grid.
// `levelLimit` can be false (don't limit), a number, or true (should be computed).
limitRows: function(levelLimit) {
        var rowStructs = this.rowStructs || [];
        var row; // row #
        var rowLevelLimit;

        for (row = 0; row < rowStructs.length; row++) {
                this.unlimitRow(row);

                if (!levelLimit) {
                        rowLevelLimit = false;
                }
                else if (typeof levelLimit === 'number') {
                        rowLevelLimit = levelLimit;
                }
                else {
                        rowLevelLimit = this.computeRowLevelLimit(row);
                }

                if (rowLevelLimit !== false) {
                        this.limitRow(row, rowLevelLimit);
                }
        }
},

// Computes the number of levels a row will accomodate without going outside its bounds.
// Assumes the row is "rigid" (maintains a constant height regardless of what is inside).
// `row` is the row number.
computeRowLevelLimit: function(row) {
        var rowEl = this.rowEls.eq(row); // the containing "fake" row div
        var rowHeight = rowEl.height(); // TODO: cache somehow?
        var trEls = this.rowStructs[row].tbodyEl.children();
        var i, trEl;
        var trHeight;

        function iterInnerHeights(i, childNode) {
                trHeight = Math.max(trHeight, $(childNode).outerHeight());
        }

        // Reveal one level <tr> at a time and stop when we find one out of bounds
        for (i = 0; i < trEls.length; i++) {
                trEl = trEls.eq(i).removeClass('fc-limited'); // reset to original state (reveal)

                // with rowspans>1 and IE8, trEl.outerHeight() would return the height of the largest cell,
                // so instead, find the tallest inner content element.
                trHeight = 0;
                trEl.find('> td > :first-child').each(iterInnerHeights);

                if (trEl.position().top + trHeight > rowHeight) {
                        return i;
                }
        }

        return false; // should not limit at all
},

// Limits the given grid row to the maximum number of levels and injects "more" links if necessary.
// `row` is the row number.
// `levelLimit` is a number for the maximum (inclusive) number of levels allowed.
limitRow: function(row, levelLimit) {
        var _this = this;
        var rowStruct = this.rowStructs[row];
        var moreNodes = []; // array of "more" <a> links and <td> DOM nodes
        var col = 0; // col #, left-to-right (not chronologically)
        var levelSegs; // array of segment objects in the last allowable level, ordered left-to-right
        var cellMatrix; // a matrix (by level, then column) of all <td> jQuery elements in the row
        var limitedNodes; // array of temporarily hidden level <tr> and segment <td> DOM nodes
        var i, seg;
        var segsBelow; // array of segment objects below `seg` in the current `col`
        var totalSegsBelow; // total number of segments below `seg` in any of the columns `seg` occupies
        var colSegsBelow; // array of segment arrays, below seg, one for each column (offset from segs's first column)
        var td, rowspan;
        var segMoreNodes; // array of "more" <td> cells that will stand-in for the current seg's cell
        var j;
        var moreTd, moreWrap, moreLink;

        // Iterates through empty level cells and places "more" links inside if need be
        function emptyCellsUntil(endCol) { // goes from current `col` to `endCol`
                while (col < endCol) {
                        segsBelow = _this.getCellSegs(row, col, levelLimit);
                        if (segsBelow.length) {
                                td = cellMatrix[levelLimit - 1][col];
                                moreLink = _this.renderMoreLink(row, col, segsBelow);
                                moreWrap = $('<div/>').append(moreLink);
                                td.append(moreWrap);
                                moreNodes.push(moreWrap[0]);
                        }
                        col++;
                }
        }

        if (levelLimit && levelLimit < rowStruct.segLevels.length) { // is it actually over the limit?
                levelSegs = rowStruct.segLevels[levelLimit - 1];
                cellMatrix = rowStruct.cellMatrix;

                limitedNodes = rowStruct.tbodyEl.children().slice(levelLimit) // get level <tr> elements past the limit
                        .addClass('fc-limited').get(); // hide elements and get a simple DOM-nodes array

                // iterate though segments in the last allowable level
                for (i = 0; i < levelSegs.length; i++) {
                        seg = levelSegs[i];
                        emptyCellsUntil(seg.leftCol); // process empty cells before the segment

                        // determine *all* segments below `seg` that occupy the same columns
                        colSegsBelow = [];
                        totalSegsBelow = 0;
                        while (col <= seg.rightCol) {
                                segsBelow = this.getCellSegs(row, col, levelLimit);
                                colSegsBelow.push(segsBelow);
                                totalSegsBelow += segsBelow.length;
                                col++;
                        }

                        if (totalSegsBelow) { // do we need to replace this segment with one or many "more" links?
                                td = cellMatrix[levelLimit - 1][seg.leftCol]; // the segment's parent cell
                                rowspan = td.attr('rowspan') || 1;
                                segMoreNodes = [];

                                // make a replacement <td> for each column the segment occupies. will be one for each colspan
                                for (j = 0; j < colSegsBelow.length; j++) {
                                        moreTd = $('<td class="fc-more-cell"/>').attr('rowspan', rowspan);
                                        segsBelow = colSegsBelow[j];
                                        moreLink = this.renderMoreLink(
                                                row,
                                                seg.leftCol + j,
                                                [ seg ].concat(segsBelow) // count seg as hidden too
                                        );
                                        moreWrap = $('<div/>').append(moreLink);
                                        moreTd.append(moreWrap);
                                        segMoreNodes.push(moreTd[0]);
                                        moreNodes.push(moreTd[0]);
                                }

                                td.addClass('fc-limited').after($(segMoreNodes)); // hide original <td> and inject replacements
                                limitedNodes.push(td[0]);
                        }
                }

                emptyCellsUntil(this.colCnt); // finish off the level
                rowStruct.moreEls = $(moreNodes); // for easy undoing later
                rowStruct.limitedEls = $(limitedNodes); // for easy undoing later
        }
},

// Reveals all levels and removes all "more"-related elements for a grid's row.
// `row` is a row number.
unlimitRow: function(row) {
        var rowStruct = this.rowStructs[row];

        if (rowStruct.moreEls) {
                rowStruct.moreEls.remove();
                rowStruct.moreEls = null;
        }

        if (rowStruct.limitedEls) {
                rowStruct.limitedEls.removeClass('fc-limited');
                rowStruct.limitedEls = null;
        }
},

// Renders an <a> element that represents hidden event element for a cell.
// Responsible for attaching click handler as well.
renderMoreLink: function(row, col, hiddenSegs) {
        var _this = this;
        var view = this.view;

        return $('<a class="fc-more"/>')
                .text(
                        this.getMoreLinkText(hiddenSegs.length)
                )
                .on('click', function(ev) {
                        var clickOption = _this.opt('eventLimitClick');
                        var date = _this.getCellDate(row, col);
                        var moreEl = $(this);
                        var dayEl = _this.getCellEl(row, col);
                        var allSegs = _this.getCellSegs(row, col);

                        // rescope the segments to be within the cell's date
                        var reslicedAllSegs = _this.resliceDaySegs(allSegs, date);
                        var reslicedHiddenSegs = _this.resliceDaySegs(hiddenSegs, date);

                        if (typeof clickOption === 'function') {
                                // the returned value can be an atomic option
                                clickOption = _this.publiclyTrigger('eventLimitClick', {
                                        context: view,
                                        args: [
                                                {
                                                        date: date.clone(),
                                                        dayEl: dayEl,
                                                        moreEl: moreEl,
                                                        segs: reslicedAllSegs,
                                                        hiddenSegs: reslicedHiddenSegs
                                                },
                                                ev,
                                                view
                                        ]
                                });
                        }

                        if (clickOption === 'popover') {
                                _this.showSegPopover(row, col, moreEl, reslicedAllSegs);
                        }
                        else if (typeof clickOption === 'string') { // a view name
                                view.calendar.zoomTo(date, clickOption);
                        }
                });
},

// Reveals the popover that displays all events within a cell
showSegPopover: function(row, col, moreLink, segs) {
        var _this = this;
        var view = this.view;
        var moreWrap = moreLink.parent(); // the <div> wrapper around the <a>
        var topEl; // the element we want to match the top coordinate of
        var options;

        if (this.rowCnt == 1) {
                topEl = view.el; // will cause the popover to cover any sort of header
        }
        else {
                topEl = this.rowEls.eq(row); // will align with top of row
        }

        options = {
                className: 'fc-more-popover ' + view.calendar.theme.getClass('popover'),
                content: this.renderSegPopoverContent(row, col, segs),
                parentEl: view.el, // attach to root of view. guarantees outside of scrollbars.
                top: topEl.offset().top,
                autoHide: true, // when the user clicks elsewhere, hide the popover
                viewportConstrain: this.opt('popoverViewportConstrain'),
                hide: function() {
                        // kill everything when the popover is hidden
                        // notify events to be removed
                        if (_this.popoverSegs) {
                                var seg;
                                var legacy;
                                var i;

                                for (i = 0; i < _this.popoverSegs.length; ++i) {
                                        seg = _this.popoverSegs[i];
                                        legacy = seg.footprint.getEventLegacy();

                                        _this.publiclyTrigger('eventDestroy', {
                                                context: legacy,
                                                args: [ legacy, seg.el, view ]
                                        });
                                }
                        }
                        _this.segPopover.removeElement();
                        _this.segPopover = null;
                        _this.popoverSegs = null;
                }
        };

        // Determine horizontal coordinate.
        // We use the moreWrap instead of the <td> to avoid border confusion.
        if (this.isRTL) {
                options.right = moreWrap.offset().left + moreWrap.outerWidth() + 1; // +1 to be over cell border
        }
        else {
                options.left = moreWrap.offset().left - 1; // -1 to be over cell border
        }

        this.segPopover = new Popover(options);
        this.segPopover.show();

        // the popover doesn't live within the grid's container element, and thus won't get the event
        // delegated-handlers for free. attach event-related handlers to the popover.
        this.bindSegHandlersToEl(this.segPopover.el);
},

// Builds the inner DOM contents of the segment popover
renderSegPopoverContent: function(row, col, segs) {
        var view = this.view;
        var theme = view.calendar.theme;
        var title = this.getCellDate(row, col).format(this.opt('dayPopoverFormat'));
        var content = $(
                '<div class="fc-header ' + theme.getClass('popoverHeader') + '">' +
                        '<span class="fc-close ' + theme.getIconClass('close') + '"></span>' +
                        '<span class="fc-title">' +
                                htmlEscape(title) +
                        '</span>' +
                        '<div class="fc-clear"/>' +
                '</div>' +
                '<div class="fc-body ' + theme.getClass('popoverContent') + '">' +
                        '<div class="fc-event-container"></div>' +
                '</div>'
        );
        var segContainer = content.find('.fc-event-container');
        var i;

        // render each seg's `el` and only return the visible segs
        segs = this.renderFgSegEls(segs, true); // disableResizing=true
        this.popoverSegs = segs;

        for (i = 0; i < segs.length; i++) {

                // because segments in the popover are not part of a grid coordinate system, provide a hint to any
                // grids that want to do drag-n-drop about which cell it came from
                this.hitsNeeded();
                segs[i].hit = this.getCellHit(row, col);
                this.hitsNotNeeded();

                segContainer.append(segs[i].el);
        }

        return content;
},

// Given the events within an array of segment objects, reslice them to be in a single day
resliceDaySegs: function(segs, dayDate) {
        var dayStart = dayDate.clone();
        var dayEnd = dayStart.clone().add(1, 'days');
        var dayRange = new UnzonedRange(dayStart, dayEnd);
        var newSegs = [];
        var i;

        for (i = 0; i < segs.length; i++) {
                newSegs.push.apply(newSegs, // append
                        this.eventFootprintToSegs(segs[i].footprint, dayRange)
                );
        }

        // force an order because eventsToSegs doesn't guarantee one
        // TODO: research if still needed
        this.sortEventSegs(newSegs);

        return newSegs;
},

// Generates the text that should be inside a "more" link, given the number of events it represents
getMoreLinkText: function(num) {
        var opt = this.opt('eventLimitText');

        if (typeof opt === 'function') {
                return opt(num);
        }
        else {
                return '+' + num + ' ' + opt;
        }
},

// Returns segments within a given cell.
// If `startLevel` is specified, returns only events including and below that level. Otherwise returns all segs.
getCellSegs: function(row, col, startLevel) {
        var segMatrix = this.rowStructs[row].segMatrix;
        var level = startLevel || 0;
        var segs = [];
        var seg;

        while (level < segMatrix.length) {
                seg = segMatrix[level][col];
                if (seg) {
                        segs.push(seg);
                }
                level++;
        }

        return segs;
}

});

;;

/* A component that renders one or more columns of vertical time slots ———————————————————————————————————————-*/ // We mixin DayTable, even though there is only a single row of days

var TimeGrid = FC.TimeGrid = Grid.extend(DayTableMixin, {

dayRanges: null, // UnzonedRange[], of start-end of each day
slotDuration: null, // duration of a "slot", a distinct time segment on given day, visualized by lines
snapDuration: null, // granularity of time for dragging and selecting
snapsPerSlot: null,
labelFormat: null, // formatting string for times running along vertical axis
labelInterval: null, // duration of how often a label should be displayed for a slot

colEls: null, // cells elements in the day-row background
slatContainerEl: null, // div that wraps all the slat rows
slatEls: null, // elements running horizontally across all columns
nowIndicatorEls: null,

colCoordCache: null,
slatCoordCache: null,

constructor: function() {
        Grid.apply(this, arguments); // call the super-constructor

        this.processOptions();
},

// Renders the time grid into `this.el`, which should already be assigned.
// Relies on the view's colCnt. In the future, this component should probably be self-sufficient.
renderDates: function() {
        this.el.html(this.renderHtml());
        this.colEls = this.el.find('.fc-day, .fc-disabled-day');
        this.slatContainerEl = this.el.find('.fc-slats');
        this.slatEls = this.slatContainerEl.find('tr');

        this.colCoordCache = new CoordCache({
                els: this.colEls,
                isHorizontal: true
        });
        this.slatCoordCache = new CoordCache({
                els: this.slatEls,
                isVertical: true
        });

        this.renderContentSkeleton();
},

// Renders the basic HTML skeleton for the grid
renderHtml: function() {
        var theme = this.view.calendar.theme;

        return '' +
                '<div class="fc-bg">' +
                        '<table class="' + theme.getClass('tableGrid') + '">' +
                                this.renderBgTrHtml(0) + // row=0
                        '</table>' +
                '</div>' +
                '<div class="fc-slats">' +
                        '<table class="' + theme.getClass('tableGrid') + '">' +
                                this.renderSlatRowHtml() +
                        '</table>' +
                '</div>';
},

// Generates the HTML for the horizontal "slats" that run width-wise. Has a time axis on a side. Depends on RTL.
renderSlatRowHtml: function() {
        var view = this.view;
        var calendar = view.calendar;
        var theme = calendar.theme;
        var isRTL = this.isRTL;
        var html = '';
        var slotTime = moment.duration(+this.view.minTime); // wish there was .clone() for durations
        var slotIterator = moment.duration(0);
        var slotDate; // will be on the view's first day, but we only care about its time
        var isLabeled;
        var axisHtml;

        // Calculate the time for each slot
        while (slotTime < view.maxTime) {
                slotDate = calendar.msToUtcMoment(this.unzonedRange.startMs).time(slotTime);
                isLabeled = isInt(divideDurationByDuration(slotIterator, this.labelInterval));

                axisHtml =
                        '<td class="fc-axis fc-time ' + theme.getClass('widgetContent') + '" ' + view.axisStyleAttr() + '>' +
                                (isLabeled ?
                                        '<span>' + // for matchCellWidths
                                                htmlEscape(slotDate.format(this.labelFormat)) +
                                        '</span>' :
                                        ''
                                        ) +
                        '</td>';

                html +=
                        '<tr data-time="' + slotDate.format('HH:mm:ss') + '"' +
                                (isLabeled ? '' : ' class="fc-minor"') +
                                '>' +
                                (!isRTL ? axisHtml : '') +
                                '<td class="' + theme.getClass('widgetContent') + '"/>' +
                                (isRTL ? axisHtml : '') +
                        "</tr>";

                slotTime.add(this.slotDuration);
                slotIterator.add(this.slotDuration);
        }

        return html;
},

/* Options
------------------------------------------------------------------------------------------------------------------*/

// Parses various options into properties of this object
processOptions: function() {
        var slotDuration = this.opt('slotDuration');
        var snapDuration = this.opt('snapDuration');
        var input;

        slotDuration = moment.duration(slotDuration);
        snapDuration = snapDuration ? moment.duration(snapDuration) : slotDuration;

        this.slotDuration = slotDuration;
        this.snapDuration = snapDuration;
        this.snapsPerSlot = slotDuration / snapDuration; // TODO: ensure an integer multiple?

        // might be an array value (for TimelineView).
        // if so, getting the most granular entry (the last one probably).
        input = this.opt('slotLabelFormat');
        if ($.isArray(input)) {
                input = input[input.length - 1];
        }

        this.labelFormat = input ||
                this.opt('smallTimeFormat'); // the computed default

        input = this.opt('slotLabelInterval');
        this.labelInterval = input ?
                moment.duration(input) :
                this.computeLabelInterval(slotDuration);
},

// Computes an automatic value for slotLabelInterval
computeLabelInterval: function(slotDuration) {
        var i;
        var labelInterval;
        var slotsPerLabel;

        // find the smallest stock label interval that results in more than one slots-per-label
        for (i = AGENDA_STOCK_SUB_DURATIONS.length - 1; i >= 0; i--) {
                labelInterval = moment.duration(AGENDA_STOCK_SUB_DURATIONS[i]);
                slotsPerLabel = divideDurationByDuration(labelInterval, slotDuration);
                if (isInt(slotsPerLabel) && slotsPerLabel > 1) {
                        return labelInterval;
                }
        }

        return moment.duration(slotDuration); // fall back. clone
},

// Computes a default event time formatting string if `timeFormat` is not explicitly defined
computeEventTimeFormat: function() {
        return this.opt('noMeridiemTimeFormat'); // like "6:30" (no AM/PM)
},

// Computes a default `displayEventEnd` value if one is not expliclty defined
computeDisplayEventEnd: function() {
        return true;
},

/* Hit System
------------------------------------------------------------------------------------------------------------------*/

prepareHits: function() {
        this.colCoordCache.build();
        this.slatCoordCache.build();
},

releaseHits: function() {
        this.colCoordCache.clear();
        // NOTE: don't clear slatCoordCache because we rely on it for computeTimeTop
},

queryHit: function(leftOffset, topOffset) {
        var snapsPerSlot = this.snapsPerSlot;
        var colCoordCache = this.colCoordCache;
        var slatCoordCache = this.slatCoordCache;

        if (colCoordCache.isLeftInBounds(leftOffset) && slatCoordCache.isTopInBounds(topOffset)) {
                var colIndex = colCoordCache.getHorizontalIndex(leftOffset);
                var slatIndex = slatCoordCache.getVerticalIndex(topOffset);

                if (colIndex != null && slatIndex != null) {
                        var slatTop = slatCoordCache.getTopOffset(slatIndex);
                        var slatHeight = slatCoordCache.getHeight(slatIndex);
                        var partial = (topOffset - slatTop) / slatHeight; // floating point number between 0 and 1
                        var localSnapIndex = Math.floor(partial * snapsPerSlot); // the snap # relative to start of slat
                        var snapIndex = slatIndex * snapsPerSlot + localSnapIndex;
                        var snapTop = slatTop + (localSnapIndex / snapsPerSlot) * slatHeight;
                        var snapBottom = slatTop + ((localSnapIndex + 1) / snapsPerSlot) * slatHeight;

                        return {
                                col: colIndex,
                                snap: snapIndex,
                                component: this, // needed unfortunately :(
                                left: colCoordCache.getLeftOffset(colIndex),
                                right: colCoordCache.getRightOffset(colIndex),
                                top: snapTop,
                                bottom: snapBottom
                        };
                }
        }
},

getHitFootprint: function(hit) {
        var start = this.getCellDate(0, hit.col); // row=0
        var time = this.computeSnapTime(hit.snap); // pass in the snap-index
        var end;

        start.time(time);
        end = start.clone().add(this.snapDuration);

        return new ComponentFootprint(
                new UnzonedRange(start, end),
                false // all-day?
        );
},

getHitEl: function(hit) {
        return this.colEls.eq(hit.col);
},

/* Dates
------------------------------------------------------------------------------------------------------------------*/

rangeUpdated: function() {
        var view = this.view;

        this.updateDayTable();

        this.dayRanges = this.dayDates.map(function(dayDate) {
                return new UnzonedRange(
                        dayDate.clone().add(view.minTime),
                        dayDate.clone().add(view.maxTime)
                );
        });
},

// Given a row number of the grid, representing a "snap", returns a time (Duration) from its start-of-day
computeSnapTime: function(snapIndex) {
        return moment.duration(this.view.minTime + this.snapDuration * snapIndex);
},

// Slices up the given span (unzoned start/end with other misc data) into an array of segments
componentFootprintToSegs: function(componentFootprint) {
        var segs = this.sliceRangeByTimes(componentFootprint.unzonedRange);
        var i;

        for (i = 0; i < segs.length; i++) {
                if (this.isRTL) {
                        segs[i].col = this.daysPerRow - 1 - segs[i].dayIndex;
                }
                else {
                        segs[i].col = segs[i].dayIndex;
                }
        }

        return segs;
},

sliceRangeByTimes: function(unzonedRange) {
        var segs = [];
        var segRange;
        var dayIndex;

        for (dayIndex = 0; dayIndex < this.daysPerRow; dayIndex++) {

                segRange = unzonedRange.intersect(this.dayRanges[dayIndex]);

                if (segRange) {
                        segs.push({
                                startMs: segRange.startMs,
                                endMs: segRange.endMs,
                                isStart: segRange.isStart,
                                isEnd: segRange.isEnd,
                                dayIndex: dayIndex
                        });
                }
        }

        return segs;
},

/* Coordinates
------------------------------------------------------------------------------------------------------------------*/

updateSize: function(isResize) { // NOT a standard Grid method
        this.slatCoordCache.build();

        if (isResize) {
                this.updateSegVerticals(
                        [].concat(this.fgSegs || [], this.bgSegs || [], this.businessSegs || [])
                );
        }
},

getTotalSlatHeight: function() {
        return this.slatContainerEl.outerHeight();
},

// Computes the top coordinate, relative to the bounds of the grid, of the given date.
// `ms` can be a millisecond UTC time OR a UTC moment.
// A `startOfDayDate` must be given for avoiding ambiguity over how to treat midnight.
computeDateTop: function(ms, startOfDayDate) {
        return this.computeTimeTop(
                moment.duration(
                        ms - startOfDayDate.clone().stripTime()
                )
        );
},

// Computes the top coordinate, relative to the bounds of the grid, of the given time (a Duration).
computeTimeTop: function(time) {
        var len = this.slatEls.length;
        var slatCoverage = (time - this.view.minTime) / this.slotDuration; // floating-point value of # of slots covered
        var slatIndex;
        var slatRemainder;

        // compute a floating-point number for how many slats should be progressed through.
        // from 0 to number of slats (inclusive)
        // constrained because minTime/maxTime might be customized.
        slatCoverage = Math.max(0, slatCoverage);
        slatCoverage = Math.min(len, slatCoverage);

        // an integer index of the furthest whole slat
        // from 0 to number slats (*exclusive*, so len-1)
        slatIndex = Math.floor(slatCoverage);
        slatIndex = Math.min(slatIndex, len - 1);

        // how much further through the slatIndex slat (from 0.0-1.0) must be covered in addition.
        // could be 1.0 if slatCoverage is covering *all* the slots
        slatRemainder = slatCoverage - slatIndex;

        return this.slatCoordCache.getTopPosition(slatIndex) +
                this.slatCoordCache.getHeight(slatIndex) * slatRemainder;
},

/* Event Drag Visualization
------------------------------------------------------------------------------------------------------------------*/

// Renders a visual indication of an event being dragged over the specified date(s).
// A returned value of `true` signals that a mock "helper" event has been rendered.
renderDrag: function(eventFootprints, seg) {
        var i;

        if (seg) { // if there is event information for this drag, render a helper event

                // returns mock event elements
                // signal that a helper has been rendered
                return this.renderHelperEventFootprints(eventFootprints);
        }
        else { // otherwise, just render a highlight

                for (i = 0; i < eventFootprints.length; i++) {
                        this.renderHighlight(eventFootprints[i].componentFootprint);
                }
        }
},

// Unrenders any visual indication of an event being dragged
unrenderDrag: function() {
        this.unrenderHelper();
        this.unrenderHighlight();
},

/* Event Resize Visualization
------------------------------------------------------------------------------------------------------------------*/

// Renders a visual indication of an event being resized
renderEventResize: function(eventFootprints, seg) {
        return this.renderHelperEventFootprints(eventFootprints, seg); // returns mock event elements
},

// Unrenders any visual indication of an event being resized
unrenderEventResize: function() {
        this.unrenderHelper();
},

/* Event Helper
------------------------------------------------------------------------------------------------------------------*/

// Renders a mock "helper" event. `sourceSeg` is the original segment object and might be null (an external drag)
renderHelperEventFootprintEls: function(eventFootprints, sourceSeg) {
        var segs = this.eventFootprintsToSegs(eventFootprints);

        return this.renderHelperSegs( // returns mock event elements
                segs,
                sourceSeg
        );
},

// Unrenders any mock helper event
unrenderHelper: function() {
        this.unrenderHelperSegs();
},

/* Business Hours
------------------------------------------------------------------------------------------------------------------*/

renderBusinessHours: function() {
        this.renderBusinessSegs(
                this.buildBusinessHourSegs()
        );
},

unrenderBusinessHours: function() {
        this.unrenderBusinessSegs();
},

/* Now Indicator
------------------------------------------------------------------------------------------------------------------*/

getNowIndicatorUnit: function() {
        return 'minute'; // will refresh on the minute
},

renderNowIndicator: function(date) {
        // seg system might be overkill, but it handles scenario where line needs to be rendered
        //  more than once because of columns with the same date (resources columns for example)
        var segs = this.componentFootprintToSegs(
                new ComponentFootprint(
                        new UnzonedRange(date, date.valueOf() + 1), // protect against null range
                        false // all-day
                )
        );
        var top = this.computeDateTop(date, date);
        var nodes = [];
        var i;

        // render lines within the columns
        for (i = 0; i < segs.length; i++) {
                nodes.push($('<div class="fc-now-indicator fc-now-indicator-line"></div>')
                        .css('top', top)
                        .appendTo(this.colContainerEls.eq(segs[i].col))[0]);
        }

        // render an arrow over the axis
        if (segs.length > 0) { // is the current time in view?
                nodes.push($('<div class="fc-now-indicator fc-now-indicator-arrow"></div>')
                        .css('top', top)
                        .appendTo(this.el.find('.fc-content-skeleton'))[0]);
        }

        this.nowIndicatorEls = $(nodes);
},

unrenderNowIndicator: function() {
        if (this.nowIndicatorEls) {
                this.nowIndicatorEls.remove();
                this.nowIndicatorEls = null;
        }
},

/* Selection
------------------------------------------------------------------------------------------------------------------*/

// Renders a visual indication of a selection. Overrides the default, which was to simply render a highlight.
renderSelectionFootprint: function(componentFootprint) {
        if (this.opt('selectHelper')) { // this setting signals that a mock helper event should be rendered
                this.renderHelperEventFootprints([
                        this.fabricateEventFootprint(componentFootprint)
                ]);
        }
        else {
                this.renderHighlight(componentFootprint);
        }
},

// Unrenders any visual indication of a selection
unrenderSelection: function() {
        this.unrenderHelper();
        this.unrenderHighlight();
},

/* Highlight
------------------------------------------------------------------------------------------------------------------*/

renderHighlight: function(componentFootprint) {
        this.renderHighlightSegs(
                this.componentFootprintToSegs(componentFootprint)
        );
},

unrenderHighlight: function() {
        this.unrenderHighlightSegs();
}

});

;;

/* Methods for rendering SEGMENTS, pieces of content that live on the view

( this file is no longer just for events )

———————————————————————————————————————-*/

TimeGrid.mixin({

colContainerEls: null, // containers for each column

// inner-containers for each column where different types of segs live
fgContainerEls: null,
bgContainerEls: null,
helperContainerEls: null,
highlightContainerEls: null,
businessContainerEls: null,

// arrays of different types of displayed segments
fgSegs: null,
bgSegs: null,
helperSegs: null,
highlightSegs: null,
businessSegs: null,

// Renders the DOM that the view's content will live in
renderContentSkeleton: function() {
        var cellHtml = '';
        var i;
        var skeletonEl;

        for (i = 0; i < this.colCnt; i++) {
                cellHtml +=
                        '<td>' +
                                '<div class="fc-content-col">' +
                                        '<div class="fc-event-container fc-helper-container"></div>' +
                                        '<div class="fc-event-container"></div>' +
                                        '<div class="fc-highlight-container"></div>' +
                                        '<div class="fc-bgevent-container"></div>' +
                                        '<div class="fc-business-container"></div>' +
                                '</div>' +
                        '</td>';
        }

        skeletonEl = $(
                '<div class="fc-content-skeleton">' +
                        '<table>' +
                                '<tr>' + cellHtml + '</tr>' +
                        '</table>' +
                '</div>'
        );

        this.colContainerEls = skeletonEl.find('.fc-content-col');
        this.helperContainerEls = skeletonEl.find('.fc-helper-container');
        this.fgContainerEls = skeletonEl.find('.fc-event-container:not(.fc-helper-container)');
        this.bgContainerEls = skeletonEl.find('.fc-bgevent-container');
        this.highlightContainerEls = skeletonEl.find('.fc-highlight-container');
        this.businessContainerEls = skeletonEl.find('.fc-business-container');

        this.bookendCells(skeletonEl.find('tr')); // TODO: do this on string level
        this.el.append(skeletonEl);
},

/* Foreground Events
------------------------------------------------------------------------------------------------------------------*/

renderFgSegs: function(segs) {
        segs = this.renderFgSegsIntoContainers(segs, this.fgContainerEls);
        this.fgSegs = segs;
        return segs; // needed for Grid::renderEvents
},

unrenderFgSegs: function() {
        this.unrenderNamedSegs('fgSegs');
},

/* Foreground Helper Events
------------------------------------------------------------------------------------------------------------------*/

renderHelperSegs: function(segs, sourceSeg) {
        var helperEls = [];
        var i, seg;
        var sourceEl;

        segs = this.renderFgSegsIntoContainers(segs, this.helperContainerEls);

        // Try to make the segment that is in the same row as sourceSeg look the same
        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                if (sourceSeg && sourceSeg.col === seg.col) {
                        sourceEl = sourceSeg.el;
                        seg.el.css({
                                left: sourceEl.css('left'),
                                right: sourceEl.css('right'),
                                'margin-left': sourceEl.css('margin-left'),
                                'margin-right': sourceEl.css('margin-right')
                        });
                }
                helperEls.push(seg.el[0]);
        }

        this.helperSegs = segs;

        return $(helperEls); // must return rendered helpers
},

unrenderHelperSegs: function() {
        this.unrenderNamedSegs('helperSegs');
},

/* Background Events
------------------------------------------------------------------------------------------------------------------*/

renderBgSegs: function(segs) {
        segs = this.renderFillSegEls('bgEvent', segs); // TODO: old fill system
        this.updateSegVerticals(segs);
        this.attachSegsByCol(this.groupSegsByCol(segs), this.bgContainerEls);
        this.bgSegs = segs;
        return segs; // needed for Grid::renderEvents
},

unrenderBgSegs: function() {
        this.unrenderNamedSegs('bgSegs');
},

/* Highlight
------------------------------------------------------------------------------------------------------------------*/

renderHighlightSegs: function(segs) {
        segs = this.renderFillSegEls('highlight', segs); // TODO: instead of calling renderFill directly
        this.updateSegVerticals(segs);
        this.attachSegsByCol(this.groupSegsByCol(segs), this.highlightContainerEls);
        this.highlightSegs = segs;
},

unrenderHighlightSegs: function() {
        this.unrenderNamedSegs('highlightSegs');
},

/* Business Hours
------------------------------------------------------------------------------------------------------------------*/

renderBusinessSegs: function(segs) {
        segs = this.renderFillSegEls('businessHours', segs); // TODO: instead of calling renderFill directly
        this.updateSegVerticals(segs);
        this.attachSegsByCol(this.groupSegsByCol(segs), this.businessContainerEls);
        this.businessSegs = segs;
},

unrenderBusinessSegs: function() {
        this.unrenderNamedSegs('businessSegs');
},

/* Seg Rendering Utils
------------------------------------------------------------------------------------------------------------------*/

// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's col
groupSegsByCol: function(segs) {
        var segsByCol = [];
        var i;

        for (i = 0; i < this.colCnt; i++) {
                segsByCol.push([]);
        }

        for (i = 0; i < segs.length; i++) {
                segsByCol[segs[i].col].push(segs[i]);
        }

        return segsByCol;
},

// Given segments grouped by column, insert the segments' elements into a parallel array of container
// elements, each living within a column.
attachSegsByCol: function(segsByCol, containerEls) {
        var col;
        var segs;
        var i;

        for (col = 0; col < this.colCnt; col++) { // iterate each column grouping
                segs = segsByCol[col];

                for (i = 0; i < segs.length; i++) {
                        containerEls.eq(col).append(segs[i].el);
                }
        }
},

// Given the name of a property of `this` object, assumed to be an array of segments,
// loops through each segment and removes from DOM. Will null-out the property afterwards.
unrenderNamedSegs: function(propName) {
        var segs = this[propName];
        var i;

        if (segs) {
                for (i = 0; i < segs.length; i++) {
                        segs[i].el.remove();
                }
                this[propName] = null;
        }
},

/* Foreground Event Rendering Utils
------------------------------------------------------------------------------------------------------------------*/

// Given an array of foreground segments, render a DOM element for each, computes position,
// and attaches to the column inner-container elements.
renderFgSegsIntoContainers: function(segs, containerEls) {
        var segsByCol;
        var col;

        segs = this.renderFgSegEls(segs); // will call fgSegHtml
        segsByCol = this.groupSegsByCol(segs);

        for (col = 0; col < this.colCnt; col++) {
                this.updateFgSegCoords(segsByCol[col]);
        }

        this.attachSegsByCol(segsByCol, containerEls);

        return segs;
},

// Renders the HTML for a single event segment's default rendering
fgSegHtml: function(seg, disableResizing) {
        var view = this.view;
        var calendar = view.calendar;
        var componentFootprint = seg.footprint.componentFootprint;
        var isAllDay = componentFootprint.isAllDay;
        var eventDef = seg.footprint.eventDef;
        var isDraggable = view.isEventDefDraggable(eventDef);
        var isResizableFromStart = !disableResizing && seg.isStart && view.isEventDefResizableFromStart(eventDef);
        var isResizableFromEnd = !disableResizing && seg.isEnd && view.isEventDefResizableFromEnd(eventDef);
        var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
        var skinCss = cssToStr(this.getSegSkinCss(seg));
        var timeText;
        var fullTimeText; // more verbose time text. for the print stylesheet
        var startTimeText; // just the start time text

        classes.unshift('fc-time-grid-event', 'fc-v-event');

        // if the event appears to span more than one day...
        if (view.isMultiDayRange(componentFootprint.unzonedRange)) {
                // Don't display time text on segments that run entirely through a day.
                // That would appear as midnight-midnight and would look dumb.
                // Otherwise, display the time text for the *segment's* times (like 6pm-midnight or midnight-10am)
                if (seg.isStart || seg.isEnd) {
                        var zonedStart = calendar.msToMoment(seg.startMs);
                        var zonedEnd = calendar.msToMoment(seg.endMs);
                        timeText = this._getEventTimeText(zonedStart, zonedEnd, isAllDay);
                        fullTimeText = this._getEventTimeText(zonedStart, zonedEnd, isAllDay, 'LT');
                        startTimeText = this._getEventTimeText(zonedStart, zonedEnd, isAllDay, null, false); // displayEnd=false
                }
        }
        else {
                // Display the normal time text for the *event's* times
                timeText = this.getEventTimeText(seg.footprint);
                fullTimeText = this.getEventTimeText(seg.footprint, 'LT');
                startTimeText = this.getEventTimeText(seg.footprint, null, false); // displayEnd=false
        }

        return '<a class="' + classes.join(' ') + '"' +
                (eventDef.url ?
                        ' href="' + htmlEscape(eventDef.url) + '"' :
                        ''
                        ) +
                (skinCss ?
                        ' style="' + skinCss + '"' :
                        ''
                        ) +
                '>' +
                        '<div class="fc-content">' +
                                (timeText ?
                                        '<div class="fc-time"' +
                                        ' data-start="' + htmlEscape(startTimeText) + '"' +
                                        ' data-full="' + htmlEscape(fullTimeText) + '"' +
                                        '>' +
                                                '<span>' + htmlEscape(timeText) + '</span>' +
                                        '</div>' :
                                        ''
                                        ) +
                                (eventDef.title ?
                                        '<div class="fc-title">' +
                                                htmlEscape(eventDef.title) +
                                        '</div>' :
                                        ''
                                        ) +
                        '</div>' +
                        '<div class="fc-bg"/>' +
                        /* TODO: write CSS for this
                        (isResizableFromStart ?
                                '<div class="fc-resizer fc-start-resizer" />' :
                                ''
                                ) +
                        */
                        (isResizableFromEnd ?
                                '<div class="fc-resizer fc-end-resizer" />' :
                                ''
                                ) +
                '</a>';
},

/* Seg Position Utils
------------------------------------------------------------------------------------------------------------------*/

// Refreshes the CSS top/bottom coordinates for each segment element.
// Works when called after initial render, after a window resize/zoom for example.
updateSegVerticals: function(segs) {
        this.computeSegVerticals(segs);
        this.assignSegVerticals(segs);
},

// For each segment in an array, computes and assigns its top and bottom properties
computeSegVerticals: function(segs) {
        var i, seg;
        var dayDate;

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                dayDate = this.dayDates[seg.dayIndex];

                seg.top = this.computeDateTop(seg.startMs, dayDate);
                seg.bottom = this.computeDateTop(seg.endMs, dayDate);
        }
},

// Given segments that already have their top/bottom properties computed, applies those values to
// the segments' elements.
assignSegVerticals: function(segs) {
        var i, seg;

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                seg.el.css(this.generateSegVerticalCss(seg));
        }
},

// Generates an object with CSS properties for the top/bottom coordinates of a segment element
generateSegVerticalCss: function(seg) {
        return {
                top: seg.top,
                bottom: -seg.bottom // flipped because needs to be space beyond bottom edge of event container
        };
},

/* Foreground Event Positioning Utils
------------------------------------------------------------------------------------------------------------------*/

// Given segments that are assumed to all live in the *same column*,
// compute their verical/horizontal coordinates and assign to their elements.
updateFgSegCoords: function(segs) {
        this.computeSegVerticals(segs); // horizontals relies on this
        this.computeFgSegHorizontals(segs); // compute horizontal coordinates, z-index's, and reorder the array
        this.assignSegVerticals(segs);
        this.assignFgSegHorizontals(segs);
},

// Given an array of segments that are all in the same column, sets the backwardCoord and forwardCoord on each.
// NOTE: Also reorders the given array by date!
computeFgSegHorizontals: function(segs) {
        var levels;
        var level0;
        var i;

        this.sortEventSegs(segs); // order by certain criteria
        levels = buildSlotSegLevels(segs);
        computeForwardSlotSegs(levels);

        if ((level0 = levels[0])) {

                for (i = 0; i < level0.length; i++) {
                        computeSlotSegPressures(level0[i]);
                }

                for (i = 0; i < level0.length; i++) {
                        this.computeFgSegForwardBack(level0[i], 0, 0);
                }
        }
},

// Calculate seg.forwardCoord and seg.backwardCoord for the segment, where both values range
// from 0 to 1. If the calendar is left-to-right, the seg.backwardCoord maps to "left" and
// seg.forwardCoord maps to "right" (via percentage). Vice-versa if the calendar is right-to-left.
//
// The segment might be part of a "series", which means consecutive segments with the same pressure
// who's width is unknown until an edge has been hit. `seriesBackwardPressure` is the number of
// segments behind this one in the current series, and `seriesBackwardCoord` is the starting
// coordinate of the first segment in the series.
computeFgSegForwardBack: function(seg, seriesBackwardPressure, seriesBackwardCoord) {
        var forwardSegs = seg.forwardSegs;
        var i;

        if (seg.forwardCoord === undefined) { // not already computed

                if (!forwardSegs.length) {

                        // if there are no forward segments, this segment should butt up against the edge
                        seg.forwardCoord = 1;
                }
                else {

                        // sort highest pressure first
                        this.sortForwardSegs(forwardSegs);

                        // this segment's forwardCoord will be calculated from the backwardCoord of the
                        // highest-pressure forward segment.
                        this.computeFgSegForwardBack(forwardSegs[0], seriesBackwardPressure + 1, seriesBackwardCoord);
                        seg.forwardCoord = forwardSegs[0].backwardCoord;
                }

                // calculate the backwardCoord from the forwardCoord. consider the series
                seg.backwardCoord = seg.forwardCoord -
                        (seg.forwardCoord - seriesBackwardCoord) / // available width for series
                        (seriesBackwardPressure + 1); // # of segments in the series

                // use this segment's coordinates to computed the coordinates of the less-pressurized
                // forward segments
                for (i=0; i<forwardSegs.length; i++) {
                        this.computeFgSegForwardBack(forwardSegs[i], 0, seg.forwardCoord);
                }
        }
},

sortForwardSegs: function(forwardSegs) {
        forwardSegs.sort(proxy(this, 'compareForwardSegs'));
},

// A cmp function for determining which forward segment to rely on more when computing coordinates.
compareForwardSegs: function(seg1, seg2) {
        // put higher-pressure first
        return seg2.forwardPressure - seg1.forwardPressure ||
                // put segments that are closer to initial edge first (and favor ones with no coords yet)
                (seg1.backwardCoord || 0) - (seg2.backwardCoord || 0) ||
                // do normal sorting...
                this.compareEventSegs(seg1, seg2);
},

// Given foreground event segments that have already had their position coordinates computed,
// assigns position-related CSS values to their elements.
assignFgSegHorizontals: function(segs) {
        var i, seg;

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                seg.el.css(this.generateFgSegHorizontalCss(seg));

                // if the height is short, add a className for alternate styling
                if (seg.bottom - seg.top < 30) {
                        seg.el.addClass('fc-short');
                }
        }
},

// Generates an object with CSS properties/values that should be applied to an event segment element.
// Contains important positioning-related properties that should be applied to any event element, customized or not.
generateFgSegHorizontalCss: function(seg) {
        var shouldOverlap = this.opt('slotEventOverlap');
        var backwardCoord = seg.backwardCoord; // the left side if LTR. the right side if RTL. floating-point
        var forwardCoord = seg.forwardCoord; // the right side if LTR. the left side if RTL. floating-point
        var props = this.generateSegVerticalCss(seg); // get top/bottom first
        var left; // amount of space from left edge, a fraction of the total width
        var right; // amount of space from right edge, a fraction of the total width

        if (shouldOverlap) {
                // double the width, but don't go beyond the maximum forward coordinate (1.0)
                forwardCoord = Math.min(1, backwardCoord + (forwardCoord - backwardCoord) * 2);
        }

        if (this.isRTL) {
                left = 1 - forwardCoord;
                right = backwardCoord;
        }
        else {
                left = backwardCoord;
                right = 1 - forwardCoord;
        }

        props.zIndex = seg.level + 1; // convert from 0-base to 1-based
        props.left = left * 100 + '%';
        props.right = right * 100 + '%';

        if (shouldOverlap && seg.forwardPressure) {
                // add padding to the edge so that forward stacked events don't cover the resizer's icon
                props[this.isRTL ? 'marginLeft' : 'marginRight'] = 10 * 2; // 10 is a guesstimate of the icon's width
        }

        return props;
}

});

// Builds an array of segments “levels”. The first level will be the leftmost tier of segments if the calendar is // left-to-right, or the rightmost if the calendar is right-to-left. Assumes the segments are already ordered by date. function buildSlotSegLevels(segs) {

var levels = [];
var i, seg;
var j;

for (i=0; i<segs.length; i++) {
        seg = segs[i];

        // go through all the levels and stop on the first level where there are no collisions
        for (j=0; j<levels.length; j++) {
                if (!computeSlotSegCollisions(seg, levels[j]).length) {
                        break;
                }
        }

        seg.level = j;

        (levels[j] || (levels[j] = [])).push(seg);
}

return levels;

}

// For every segment, figure out the other segments that are in subsequent // levels that also occupy the same vertical space. Accumulate in seg.forwardSegs function computeForwardSlotSegs(levels) {

var i, level;
var j, seg;
var k;

for (i=0; i<levels.length; i++) {
        level = levels[i];

        for (j=0; j<level.length; j++) {
                seg = level[j];

                seg.forwardSegs = [];
                for (k=i+1; k<levels.length; k++) {
                        computeSlotSegCollisions(seg, levels[k], seg.forwardSegs);
                }
        }
}

}

// Figure out which path forward (via seg.forwardSegs) results in the longest path until // the furthest edge is reached. The number of segments in this path will be seg.forwardPressure function computeSlotSegPressures(seg) {

var forwardSegs = seg.forwardSegs;
var forwardPressure = 0;
var i, forwardSeg;

if (seg.forwardPressure === undefined) { // not already computed

        for (i=0; i<forwardSegs.length; i++) {
                forwardSeg = forwardSegs[i];

                // figure out the child's maximum forward path
                computeSlotSegPressures(forwardSeg);

                // either use the existing maximum, or use the child's forward pressure
                // plus one (for the forwardSeg itself)
                forwardPressure = Math.max(
                        forwardPressure,
                        1 + forwardSeg.forwardPressure
                );
        }

        seg.forwardPressure = forwardPressure;
}

}

// Find all the segments in `otherSegs` that vertically collide with `seg`. // Append into an optionally-supplied `results` array and return. function computeSlotSegCollisions(seg, otherSegs, results) {

results = results || [];

for (var i=0; i<otherSegs.length; i++) {
        if (isSlotSegCollision(seg, otherSegs[i])) {
                results.push(otherSegs[i]);
        }
}

return results;

}

// Do these segments occupy the same vertical space? function isSlotSegCollision(seg1, seg2) {

return seg1.bottom > seg2.top && seg1.top < seg2.bottom;

}

;;

/* An abstract class from which other views inherit from ———————————————————————————————————————-*/

var View = FC.View = ChronoComponent.extend({

type: null, // subclass' view name (string)
name: null, // deprecated. use `type` instead
title: null, // the text that will be displayed in the header's title

calendar: null, // owner Calendar object
viewSpec: null,
options: null, // hash containing all options. already merged with view-specific-options

renderQueue: null,
batchRenderDepth: 0,
isDatesRendered: false,
isEventsRendered: false,
isBaseRendered: false, // related to viewRender/viewDestroy triggers

queuedScroll: null,

isSelected: false, // boolean whether a range of time is user-selected or not
selectedEventInstance: null,

eventOrderSpecs: null, // criteria for ordering events when they have same date/time

// for date utils, computed from options
isHiddenDayHash: null,

// now indicator
isNowIndicatorRendered: null,
initialNowDate: null, // result first getNow call
initialNowQueriedMs: null, // ms time the getNow was called
nowIndicatorTimeoutID: null, // for refresh timing of now indicator
nowIndicatorIntervalID: null, // "

constructor: function(calendar, viewSpec) {
        this.calendar = calendar;
        this.viewSpec = viewSpec;

        // shortcuts
        this.type = viewSpec.type;
        this.options = viewSpec.options;

        // .name is deprecated
        this.name = this.type;

        ChronoComponent.call(this);

        this.initHiddenDays();
        this.eventOrderSpecs = parseFieldSpecs(this.opt('eventOrder'));

        this.renderQueue = this.buildRenderQueue();
        this.initAutoBatchRender();

        this.initialize();
},

buildRenderQueue: function() {
        var _this = this;
        var renderQueue = new RenderQueue({
                event: this.opt('eventRenderWait')
        });

        renderQueue.on('start', function() {
                _this.freezeHeight();
                _this.addScroll(_this.queryScroll());
        });

        renderQueue.on('stop', function() {
                _this.thawHeight();
                _this.popScroll();
        });

        return renderQueue;
},

initAutoBatchRender: function() {
        var _this = this;

        this.on('before:change', function() {
                _this.startBatchRender();
        });

        this.on('change', function() {
                _this.stopBatchRender();
        });
},

startBatchRender: function() {
        if (!(this.batchRenderDepth++)) {
                this.renderQueue.pause();
        }
},

stopBatchRender: function() {
        if (!(--this.batchRenderDepth)) {
                this.renderQueue.resume();
        }
},

// A good place for subclasses to initialize member variables
initialize: function() {
        // subclasses can implement
},

// Retrieves an option with the given name
opt: function(name) {
        return this.options[name];
},

/* Title and Date Formatting
------------------------------------------------------------------------------------------------------------------*/

// Computes what the title at the top of the calendar should be for this view
computeTitle: function() {
        var unzonedRange;

        // for views that span a large unit of time, show the proper interval, ignoring stray days before and after
        if (/^(year|month)$/.test(this.currentRangeUnit)) {
                unzonedRange = this.currentUnzonedRange;
        }
        else { // for day units or smaller, use the actual day range
                unzonedRange = this.activeUnzonedRange;
        }

        return this.formatRange(
                {
                        start: this.calendar.msToMoment(unzonedRange.startMs, this.isRangeAllDay),
                        end: this.calendar.msToMoment(unzonedRange.endMs, this.isRangeAllDay)
                },
                this.isRangeAllDay,
                this.opt('titleFormat') || this.computeTitleFormat(),
                this.opt('titleRangeSeparator')
        );
},

// Generates the format string that should be used to generate the title for the current date range.
// Attempts to compute the most appropriate format if not explicitly specified with `titleFormat`.
computeTitleFormat: function() {
        if (this.currentRangeUnit == 'year') {
                return 'YYYY';
        }
        else if (this.currentRangeUnit == 'month') {
                return this.opt('monthYearFormat'); // like "September 2014"
        }
        else if (this.currentRangeAs('days') > 1) {
                return 'll'; // multi-day range. shorter, like "Sep 9 - 10 2014"
        }
        else {
                return 'LL'; // one day. longer, like "September 9 2014"
        }
},

// Element
// -----------------------------------------------------------------------------------------------------------------

setElement: function(el) {
        ChronoComponent.prototype.setElement.apply(this, arguments);

        this.bindBaseRenderHandlers();
},

removeElement: function() {
        this.unsetDate();
        this.unbindBaseRenderHandlers();

        ChronoComponent.prototype.removeElement.apply(this, arguments);
},

// Date Setting/Unsetting
// -----------------------------------------------------------------------------------------------------------------

setDate: function(date) {
        var currentDateProfile = this.get('dateProfile');
        var newDateProfile = this.buildDateProfile(date, null, true); // forceToValid=true

        if (
                !currentDateProfile ||
                !currentDateProfile.activeUnzonedRange.equals(newDateProfile.activeUnzonedRange)
        ) {
                this.set('dateProfile', newDateProfile);
        }

        return newDateProfile.date;
},

unsetDate: function() {
        this.unset('dateProfile');
},

// Date Rendering
// -----------------------------------------------------------------------------------------------------------------

requestDateRender: function(dateProfile) {
        var _this = this;

        this.renderQueue.queue(function() {
                _this.executeDateRender(dateProfile);
        }, 'date', 'init');
},

requestDateUnrender: function() {
        var _this = this;

        this.renderQueue.queue(function() {
                _this.executeDateUnrender();
        }, 'date', 'destroy');
},

// Event Data
// -----------------------------------------------------------------------------------------------------------------

fetchInitialEvents: function(dateProfile) {
        var calendar = this.calendar;
        var forceAllDay = dateProfile.isRangeAllDay && !this.usesMinMaxTime;

        return calendar.requestEvents(
                calendar.msToMoment(dateProfile.activeUnzonedRange.startMs, forceAllDay),
                calendar.msToMoment(dateProfile.activeUnzonedRange.endMs, forceAllDay)
        );
},

bindEventChanges: function() {
        this.listenTo(this.calendar, 'eventsReset', this.resetEvents);
},

unbindEventChanges: function() {
        this.stopListeningTo(this.calendar, 'eventsReset');
},

setEvents: function(eventsPayload) {
        this.set('currentEvents', eventsPayload);
        this.set('hasEvents', true);
},

unsetEvents: function() {
        this.unset('currentEvents');
        this.unset('hasEvents');
},

resetEvents: function(eventsPayload) {
        this.startBatchRender();
        this.unsetEvents();
        this.setEvents(eventsPayload);
        this.stopBatchRender();
},

// Event Rendering
// -----------------------------------------------------------------------------------------------------------------

requestEventsRender: function(eventsPayload) {
        var _this = this;

        this.renderQueue.queue(function() {
                _this.executeEventsRender(eventsPayload);
        }, 'event', 'init');
},

requestEventsUnrender: function() {
        var _this = this;

        this.renderQueue.queue(function() {
                _this.executeEventsUnrender();
        }, 'event', 'destroy');
},

// Date High-level Rendering
// -----------------------------------------------------------------------------------------------------------------

// if dateProfile not specified, uses current
executeDateRender: function(dateProfile, skipScroll) {

        this.setDateProfileForRendering(dateProfile);

        if (this.render) {
                this.render(); // TODO: deprecate
        }

        this.renderDates();
        this.updateSize();
        this.renderBusinessHours(); // might need coordinates, so should go after updateSize()
        this.startNowIndicator();

        if (!skipScroll) {
                this.addScroll(this.computeInitialDateScroll());
        }

        this.isDatesRendered = true;
        this.trigger('datesRendered');
},

executeDateUnrender: function() {

        this.unselect();
        this.stopNowIndicator();

        this.trigger('before:datesUnrendered');

        this.unrenderBusinessHours();
        this.unrenderDates();

        if (this.destroy) {
                this.destroy(); // TODO: deprecate
        }

        this.isDatesRendered = false;
},

// Determing when the "meat" of the view is rendered (aka the base)
// -----------------------------------------------------------------------------------------------------------------

bindBaseRenderHandlers: function() {
        var _this = this;

        this.on('datesRendered.baseHandler', function() {
                _this.onBaseRender();
        });

        this.on('before:datesUnrendered.baseHandler', function() {
                _this.onBeforeBaseUnrender();
        });
},

unbindBaseRenderHandlers: function() {
        this.off('.baseHandler');
},

onBaseRender: function() {
        this.applyScreenState();
        this.publiclyTrigger('viewRender', {
                context: this,
                args: [ this, this.el ]
        });
},

onBeforeBaseUnrender: function() {
        this.applyScreenState();
        this.publiclyTrigger('viewDestroy', {
                context: this,
                args: [ this, this.el ]
        });
},

// Misc view rendering utils
// -----------------------------------------------------------------------------------------------------------------

// Binds DOM handlers to elements that reside outside the view container, such as the document
bindGlobalHandlers: function() {
        this.listenTo(GlobalEmitter.get(), {
                touchstart: this.processUnselect,
                mousedown: this.handleDocumentMousedown
        });
},

// Unbinds DOM handlers from elements that reside outside the view container
unbindGlobalHandlers: function() {
        this.stopListeningTo(GlobalEmitter.get());
},

/* Now Indicator
------------------------------------------------------------------------------------------------------------------*/

// Immediately render the current time indicator and begins re-rendering it at an interval,
// which is defined by this.getNowIndicatorUnit().
// TODO: somehow do this for the current whole day's background too
startNowIndicator: function() {
        var _this = this;
        var unit;
        var update;
        var delay; // ms wait value

        if (this.opt('nowIndicator')) {
                unit = this.getNowIndicatorUnit();
                if (unit) {
                        update = proxy(this, 'updateNowIndicator'); // bind to `this`

                        this.initialNowDate = this.calendar.getNow();
                        this.initialNowQueriedMs = +new Date();
                        this.renderNowIndicator(this.initialNowDate);
                        this.isNowIndicatorRendered = true;

                        // wait until the beginning of the next interval
                        delay = this.initialNowDate.clone().startOf(unit).add(1, unit) - this.initialNowDate;
                        this.nowIndicatorTimeoutID = setTimeout(function() {
                                _this.nowIndicatorTimeoutID = null;
                                update();
                                delay = +moment.duration(1, unit);
                                delay = Math.max(100, delay); // prevent too frequent
                                _this.nowIndicatorIntervalID = setInterval(update, delay); // update every interval
                        }, delay);
                }
        }
},

// rerenders the now indicator, computing the new current time from the amount of time that has passed
// since the initial getNow call.
updateNowIndicator: function() {
        if (this.isNowIndicatorRendered) {
                this.unrenderNowIndicator();
                this.renderNowIndicator(
                        this.initialNowDate.clone().add(new Date() - this.initialNowQueriedMs) // add ms
                );
        }
},

// Immediately unrenders the view's current time indicator and stops any re-rendering timers.
// Won't cause side effects if indicator isn't rendered.
stopNowIndicator: function() {
        if (this.isNowIndicatorRendered) {

                if (this.nowIndicatorTimeoutID) {
                        clearTimeout(this.nowIndicatorTimeoutID);
                        this.nowIndicatorTimeoutID = null;
                }
                if (this.nowIndicatorIntervalID) {
                        clearTimeout(this.nowIndicatorIntervalID);
                        this.nowIndicatorIntervalID = null;
                }

                this.unrenderNowIndicator();
                this.isNowIndicatorRendered = false;
        }
},

/* Dimensions
------------------------------------------------------------------------------------------------------------------*/
// TODO: move some of these to ChronoComponent

// Refreshes anything dependant upon sizing of the container element of the grid
updateSize: function(isResize) {
        var scroll;

        if (isResize) {
                scroll = this.queryScroll();
        }

        this.updateHeight(isResize);
        this.updateWidth(isResize);
        this.updateNowIndicator();

        if (isResize) {
                this.applyScroll(scroll);
        }
},

// Refreshes the horizontal dimensions of the calendar
updateWidth: function(isResize) {
        // subclasses should implement
},

// Refreshes the vertical dimensions of the calendar
updateHeight: function(isResize) {
        var calendar = this.calendar; // we poll the calendar for height information

        this.setHeight(
                calendar.getSuggestedViewHeight(),
                calendar.isHeightAuto()
        );
},

// Updates the vertical dimensions of the calendar to the specified height.
// if `isAuto` is set to true, height becomes merely a suggestion and the view should use its "natural" height.
setHeight: function(height, isAuto) {
        // subclasses should implement
},

/* Scroller
------------------------------------------------------------------------------------------------------------------*/

addForcedScroll: function(scroll) {
        this.addScroll(
                $.extend(scroll, { isForced: true })
        );
},

addScroll: function(scroll) {
        var queuedScroll = this.queuedScroll || (this.queuedScroll = {});

        if (!queuedScroll.isForced) {
                $.extend(queuedScroll, scroll);
        }
},

popScroll: function() {
        this.applyQueuedScroll();
        this.queuedScroll = null;
},

applyQueuedScroll: function() {
        if (this.queuedScroll) {
                this.applyScroll(this.queuedScroll);
        }
},

queryScroll: function() {
        var scroll = {};

        if (this.isDatesRendered) {
                $.extend(scroll, this.queryDateScroll());
        }

        return scroll;
},

applyScroll: function(scroll) {
        if (this.isDatesRendered) {
                this.applyDateScroll(scroll);
        }
},

computeInitialDateScroll: function() {
        return {}; // subclasses must implement
},

queryDateScroll: function() {
        return {}; // subclasses must implement
},

applyDateScroll: function(scroll) {
        ; // subclasses must implement
},

/* Height Freezing
------------------------------------------------------------------------------------------------------------------*/

freezeHeight: function() {
        this.calendar.freezeContentHeight();
},

thawHeight: function() {
        this.calendar.thawContentHeight();
},

// Event High-level Rendering
// -----------------------------------------------------------------------------------------------------------------

executeEventsRender: function(eventsPayload) {

        if (this.renderEvents) { // for legacy custom views
                this.renderEvents(convertEventsPayloadToLegacyArray(eventsPayload));
        }
        else {
                this.renderEventsPayload(eventsPayload);
        }

        this.isEventsRendered = true;

        this.onEventsRender();
},

executeEventsUnrender: function() {
        this.onBeforeEventsUnrender();

        if (this.destroyEvents) {
                this.destroyEvents(); // TODO: deprecate
        }

        this.unrenderEvents();
        this.isEventsRendered = false;
},

// Event Rendering Triggers
// -----------------------------------------------------------------------------------------------------------------

// Signals that all events have been rendered
onEventsRender: function() {
        var _this = this;
        var hasSingleHandlers = this.hasPublicHandlers('eventAfterRender');

        if (hasSingleHandlers || this.hasPublicHandlers('eventAfterAllRender')) {
                this.applyScreenState();
        }

        if (hasSingleHandlers) {
                this.getEventSegs().forEach(function(seg) {
                        var legacy;

                        if (seg.el) { // necessary?
                                legacy = seg.footprint.getEventLegacy();

                                _this.publiclyTrigger('eventAfterRender', {
                                        context: legacy,
                                        args: [ legacy, seg.el, _this ]
                                });
                        }
                });
        }

        this.publiclyTrigger('eventAfterAllRender', {
                context: this,
                args: [ this ]
        });
},

// Signals that all event elements are about to be removed
onBeforeEventsUnrender: function() {
        var _this = this;

        if (this.hasPublicHandlers('eventDestroy')) {

                this.applyScreenState();

                this.getEventSegs().forEach(function(seg) {
                        var legacy;

                        if (seg.el) { // necessary?
                                legacy = seg.footprint.getEventLegacy();

                                _this.publiclyTrigger('eventDestroy', {
                                        context: legacy,
                                        args: [ legacy, seg.el, _this ]
                                });
                        }
                });
        }
},

applyScreenState: function() {
        this.thawHeight();
        this.freezeHeight();
        this.applyQueuedScroll();
},

// Event Rendering Utils
// -----------------------------------------------------------------------------------------------------------------
// TODO: move this to ChronoComponent

// Hides all rendered event segments linked to the given event
showEventsWithId: function(eventDefId) {
        this.getEventSegs().forEach(function(seg) {
                if (
                        seg.footprint.eventDef.id === eventDefId &&
                        seg.el // necessary?
                ) {
                        seg.el.css('visibility', '');
                }
        });
},

// Shows all rendered event segments linked to the given event
hideEventsWithId: function(eventDefId) {
        this.getEventSegs().forEach(function(seg) {
                if (
                        seg.footprint.eventDef.id === eventDefId &&
                        seg.el // necessary?
                ) {
                        seg.el.css('visibility', 'hidden');
                }
        });
},

/* Event Drag-n-Drop
------------------------------------------------------------------------------------------------------------------*/

reportEventDrop: function(eventInstance, eventMutation, el, ev) {
        var eventManager = this.calendar.eventManager;
        var undoFunc = eventManager.mutateEventsWithId(
                eventInstance.def.id,
                eventMutation,
                this.calendar
        );
        var dateMutation = eventMutation.dateMutation;

        // update the EventInstance, for handlers
        if (dateMutation) {
                eventInstance.dateProfile = dateMutation.buildNewDateProfile(
                        eventInstance.dateProfile,
                        this.calendar
                );
        }

        this.triggerEventDrop(
                eventInstance,
                // a drop doesn't necessarily mean a date mutation (ex: resource change)
                (dateMutation && dateMutation.dateDelta) || moment.duration(),
                undoFunc,
                el, ev
        );
},

// Triggers event-drop handlers that have subscribed via the API
triggerEventDrop: function(eventInstance, dateDelta, undoFunc, el, ev) {
        this.publiclyTrigger('eventDrop', {
                context: el[0],
                args: [
                        eventInstance.toLegacy(),
                        dateDelta,
                        undoFunc,
                        ev,
                        {}, // {} = jqui dummy
                        this
                ]
        });
},

/* External Element Drag-n-Drop
------------------------------------------------------------------------------------------------------------------*/

// Must be called when an external element, via jQuery UI, has been dropped onto the calendar.
// `meta` is the parsed data that has been embedded into the dragging event.
// `dropLocation` is an object that contains the new zoned start/end/allDay values for the event.
reportExternalDrop: function(singleEventDef, isEvent, isSticky, el, ev, ui) {

        if (isEvent) {
                this.calendar.eventManager.addEventDef(singleEventDef, isSticky);
        }

        this.triggerExternalDrop(singleEventDef, isEvent, el, ev, ui);
},

// Triggers external-drop handlers that have subscribed via the API
triggerExternalDrop: function(singleEventDef, isEvent, el, ev, ui) {

        // trigger 'drop' regardless of whether element represents an event
        this.publiclyTrigger('drop', {
                context: el[0],
                args: [
                        singleEventDef.dateProfile.start.clone(),
                        ev,
                        ui,
                        this
                ]
        });

        if (isEvent) {
                // signal an external event landed
                this.publiclyTrigger('eventReceive', {
                        context: this,
                        args: [
                                singleEventDef.buildInstance().toLegacy(),
                                this
                        ]
                });
        }
},

/* Event Resizing
------------------------------------------------------------------------------------------------------------------*/

// Must be called when an event in the view has been resized to a new length
reportEventResize: function(eventInstance, eventMutation, el, ev) {
        var eventManager = this.calendar.eventManager;
        var undoFunc = eventManager.mutateEventsWithId(
                eventInstance.def.id,
                eventMutation,
                this.calendar
        );

        // update the EventInstance, for handlers
        eventInstance.dateProfile = eventMutation.dateMutation.buildNewDateProfile(
                eventInstance.dateProfile,
                this.calendar
        );

        this.triggerEventResize(
                eventInstance,
                eventMutation.dateMutation.endDelta,
                undoFunc,
                el, ev
        );
},

// Triggers event-resize handlers that have subscribed via the API
triggerEventResize: function(eventInstance, durationDelta, undoFunc, el, ev) {
        this.publiclyTrigger('eventResize', {
                context: el[0],
                args: [
                        eventInstance.toLegacy(),
                        durationDelta,
                        undoFunc,
                        ev,
                        {}, // {} = jqui dummy
                        this
                ]
        });
},

/* Selection (time range)
------------------------------------------------------------------------------------------------------------------*/

// Selects a date span on the view. `start` and `end` are both Moments.
// `ev` is the native mouse event that begin the interaction.
select: function(footprint, ev) {
        this.unselect(ev);
        this.renderSelectionFootprint(footprint);
        this.reportSelection(footprint, ev);
},

renderSelectionFootprint: function(footprint, ev) {
        if (this.renderSelection) { // legacy method in custom view classes
                this.renderSelection(
                        footprint.toLegacy(this.calendar)
                );
        }
        else {
                ChronoComponent.prototype.renderSelectionFootprint.apply(this, arguments);
        }
},

// Called when a new selection is made. Updates internal state and triggers handlers.
reportSelection: function(footprint, ev) {
        this.isSelected = true;
        this.triggerSelect(footprint, ev);
},

// Triggers handlers to 'select'
triggerSelect: function(footprint, ev) {
        var dateProfile = this.calendar.footprintToDateProfile(footprint); // abuse of "Event"DateProfile?

        this.publiclyTrigger('select', {
                context: this,
                args: [
                        dateProfile.start,
                        dateProfile.end,
                        ev,
                        this
                ]
        });
},

// Undoes a selection. updates in the internal state and triggers handlers.
// `ev` is the native mouse event that began the interaction.
unselect: function(ev) {
        if (this.isSelected) {
                this.isSelected = false;
                if (this.destroySelection) {
                        this.destroySelection(); // TODO: deprecate
                }
                this.unrenderSelection();
                this.publiclyTrigger('unselect', {
                        context: this,
                        args: [ ev, this ]
                });
        }
},

/* Event Selection
------------------------------------------------------------------------------------------------------------------*/

selectEventInstance: function(eventInstance) {
        if (
                !this.selectedEventInstance ||
                this.selectedEventInstance !== eventInstance
        ) {
                this.unselectEventInstance();

                this.getEventSegs().forEach(function(seg) {
                        if (
                                seg.footprint.eventInstance === eventInstance &&
                                seg.el // necessary?
                        ) {
                                seg.el.addClass('fc-selected');
                        }
                });

                this.selectedEventInstance = eventInstance;
        }
},

unselectEventInstance: function() {
        if (this.selectedEventInstance) {

                this.getEventSegs().forEach(function(seg) {
                        if (seg.el) { // necessary?
                                seg.el.removeClass('fc-selected');
                        }
                });

                this.selectedEventInstance = null;
        }
},

isEventDefSelected: function(eventDef) {
        // event references might change on refetchEvents(), while selectedEventInstance doesn't,
        // so compare IDs
        return this.selectedEventInstance && this.selectedEventInstance.def.id === eventDef.id;
},

/* Mouse / Touch Unselecting (time range & event unselection)
------------------------------------------------------------------------------------------------------------------*/
// TODO: move consistently to down/start or up/end?
// TODO: don't kill previous selection if touch scrolling

handleDocumentMousedown: function(ev) {
        if (isPrimaryMouseButton(ev)) {
                this.processUnselect(ev);
        }
},

processUnselect: function(ev) {
        this.processRangeUnselect(ev);
        this.processEventUnselect(ev);
},

processRangeUnselect: function(ev) {
        var ignore;

        // is there a time-range selection?
        if (this.isSelected && this.opt('unselectAuto')) {
                // only unselect if the clicked element is not identical to or inside of an 'unselectCancel' element
                ignore = this.opt('unselectCancel');
                if (!ignore || !$(ev.target).closest(ignore).length) {
                        this.unselect(ev);
                }
        }
},

processEventUnselect: function(ev) {
        if (this.selectedEventInstance) {
                if (!$(ev.target).closest('.fc-selected').length) {
                        this.unselectEventInstance();
                }
        }
},

/* Day Click
------------------------------------------------------------------------------------------------------------------*/

// Triggers handlers to 'dayClick'
// Span has start/end of the clicked area. Only the start is useful.
triggerDayClick: function(footprint, dayEl, ev) {
        var dateProfile = this.calendar.footprintToDateProfile(footprint); // abuse of "Event"DateProfile?

        this.publiclyTrigger('dayClick', {
                context: dayEl,
                args: [ dateProfile.start, ev, this ]
        });
}

});

View.watch('displayingDates', [ 'dateProfile' ], function(deps) {

this.requestDateRender(deps.dateProfile);

}, function() {

this.requestDateUnrender();

});

View.watch('initialEvents', [ 'dateProfile' ], function(deps) {

return this.fetchInitialEvents(deps.dateProfile);

});

View.watch('bindingEvents', [ 'initialEvents' ], function(deps) {

this.setEvents(deps.initialEvents);
this.bindEventChanges();

}, function() {

this.unbindEventChanges();
this.unsetEvents();

});

View.watch('displayingEvents', [ 'displayingDates', 'hasEvents' ], function() {

this.requestEventsRender(this.get('currentEvents')); // if there were event mutations after initialEvents

}, function() {

this.requestEventsUnrender();

});

function convertEventsPayloadToLegacyArray(eventsPayload) {

var legacyEvents = [];
var id;
var eventInstances;
var i;

for (id in eventsPayload) {

        eventInstances = eventsPayload[id].eventInstances;

        for (i = 0; i < eventInstances.length; i++) {
                legacyEvents.push(
                        eventInstances[i].toLegacy()
                );
        }
}

return legacyEvents;

}

;;

View.mixin({

// range the view is formally responsible for.
// for example, a month view might have 1st-31st, excluding padded dates
currentUnzonedRange: null,
currentRangeUnit: null, // name of largest unit being displayed, like "month" or "week"

isRangeAllDay: false,

// date range with a rendered skeleton
// includes not-active days that need some sort of DOM
renderUnzonedRange: null,

// dates that display events and accept drag-n-drop
activeUnzonedRange: null,

// constraint for where prev/next operations can go and where events can be dragged/resized to.
// an object with optional start and end properties.
validUnzonedRange: null,

// how far the current date will move for a prev/next operation
dateIncrement: null,

minTime: null, // Duration object that denotes the first visible time of any given day
maxTime: null, // Duration object that denotes the exclusive visible end time of any given day
usesMinMaxTime: false, // whether minTime/maxTime will affect the activeUnzonedRange. Views must opt-in.

// DEPRECATED
start: null, // use activeUnzonedRange
end: null, // use activeUnzonedRange
intervalStart: null, // use currentUnzonedRange
intervalEnd: null, // use currentUnzonedRange

/* Date Range Computation
------------------------------------------------------------------------------------------------------------------*/

setDateProfileForRendering: function(dateProfile) {
        var calendar = this.calendar;

        this.currentUnzonedRange = dateProfile.currentUnzonedRange;
        this.currentRangeUnit = dateProfile.currentRangeUnit;
        this.isRangeAllDay = dateProfile.isRangeAllDay;
        this.renderUnzonedRange = dateProfile.renderUnzonedRange;
        this.activeUnzonedRange = dateProfile.activeUnzonedRange;
        this.validUnzonedRange = dateProfile.validUnzonedRange;
        this.dateIncrement = dateProfile.dateIncrement;
        this.minTime = dateProfile.minTime;
        this.maxTime = dateProfile.maxTime;

        // DEPRECATED, but we need to keep it updated...
        this.start = calendar.msToMoment(dateProfile.activeUnzonedRange.startMs, this.isRangeAllDay);
        this.end = calendar.msToMoment(dateProfile.activeUnzonedRange.endMs, this.isRangeAllDay);
        this.intervalStart = calendar.msToMoment(dateProfile.currentUnzonedRange.startMs, this.isRangeAllDay);
        this.intervalEnd = calendar.msToMoment(dateProfile.currentUnzonedRange.endMs, this.isRangeAllDay);

        this.title = this.computeTitle();
        this.calendar.reportViewDatesChanged(this, dateProfile);
},

// Builds a structure with info about what the dates/ranges will be for the "prev" view.
buildPrevDateProfile: function(date) {
        var prevDate = date.clone().startOf(this.currentRangeUnit).subtract(this.dateIncrement);

        return this.buildDateProfile(prevDate, -1);
},

// Builds a structure with info about what the dates/ranges will be for the "next" view.
buildNextDateProfile: function(date) {
        var nextDate = date.clone().startOf(this.currentRangeUnit).add(this.dateIncrement);

        return this.buildDateProfile(nextDate, 1);
},

// Builds a structure holding dates/ranges for rendering around the given date.
// Optional direction param indicates whether the date is being incremented/decremented
// from its previous value. decremented = -1, incremented = 1 (default).
buildDateProfile: function(date, direction, forceToValid) {
        var isDateAllDay = !date.hasTime();
        var validUnzonedRange = this.buildValidRange();
        var minTime = null;
        var maxTime = null;
        var currentInfo;
        var renderUnzonedRange;
        var activeUnzonedRange;
        var isValid;

        if (forceToValid) {
                date = this.calendar.msToUtcMoment(
                        validUnzonedRange.constrainDate(date), // returns MS
                        isDateAllDay
                );
        }

        currentInfo = this.buildCurrentRangeInfo(date, direction);
        renderUnzonedRange = this.buildRenderRange(currentInfo.unzonedRange, currentInfo.unit);
        activeUnzonedRange = renderUnzonedRange.clone();

        if (!this.opt('showNonCurrentDates')) {
                activeUnzonedRange = activeUnzonedRange.intersect(currentInfo.unzonedRange);
        }

        minTime = moment.duration(this.opt('minTime'));
        maxTime = moment.duration(this.opt('maxTime'));
        activeUnzonedRange = this.adjustActiveRange(activeUnzonedRange, minTime, maxTime);

        activeUnzonedRange = activeUnzonedRange.intersect(validUnzonedRange);

        if (activeUnzonedRange) {
                date = this.calendar.msToUtcMoment(
                        activeUnzonedRange.constrainDate(date), // returns MS
                        isDateAllDay
                );
        }

        // it's invalid if the originally requested date is not contained,
        // or if the range is completely outside of the valid range.
        isValid = currentInfo.unzonedRange.intersectsWith(validUnzonedRange);

        return {
                validUnzonedRange: validUnzonedRange,
                currentUnzonedRange: currentInfo.unzonedRange,
                currentRangeUnit: currentInfo.unit,
                isRangeAllDay: /^(year|month|week|day)$/.test(currentInfo.unit),
                activeUnzonedRange: activeUnzonedRange,
                renderUnzonedRange: renderUnzonedRange,
                minTime: minTime,
                maxTime: maxTime,
                isValid: isValid,
                date: date,
                dateIncrement: this.buildDateIncrement(currentInfo.duration)
                        // pass a fallback (might be null) ^
        };
},

// Builds an object with optional start/end properties.
// Indicates the minimum/maximum dates to display.
buildValidRange: function() {
        return this.getUnzonedRangeOption('validRange', this.calendar.getNow()) ||
                new UnzonedRange(); // completely open-ended
},

// Builds a structure with info about the "current" range, the range that is
// highlighted as being the current month for example.
// See buildDateProfile for a description of `direction`.
// Guaranteed to have `range` and `unit` properties. `duration` is optional.
// TODO: accept a MS-time instead of a moment `date`?
buildCurrentRangeInfo: function(date, direction) {
        var duration = null;
        var unit = null;
        var unzonedRange = null;
        var dayCount;

        if (this.viewSpec.duration) {
                duration = this.viewSpec.duration;
                unit = this.viewSpec.durationUnit;
                unzonedRange = this.buildRangeFromDuration(date, direction, duration, unit);
        }
        else if ((dayCount = this.opt('dayCount'))) {
                unit = 'day';
                unzonedRange = this.buildRangeFromDayCount(date, direction, dayCount);
        }
        else if ((unzonedRange = this.buildCustomVisibleRange(date))) {
                unit = computeGreatestUnit(unzonedRange.getStart(), unzonedRange.getEnd());
        }
        else {
                duration = this.getFallbackDuration();
                unit = computeGreatestUnit(duration);
                unzonedRange = this.buildRangeFromDuration(date, direction, duration, unit);
        }

        return { duration: duration, unit: unit, unzonedRange: unzonedRange };
},

getFallbackDuration: function() {
        return moment.duration({ days: 1 });
},

// Returns a new activeUnzonedRange to have time values (un-ambiguate)
// minTime or maxTime causes the range to expand.
adjustActiveRange: function(unzonedRange, minTime, maxTime) {
        var start = unzonedRange.getStart();
        var end = unzonedRange.getEnd();

        if (this.usesMinMaxTime) {

                if (minTime < 0) {
                        start.time(0).add(minTime);
                }

                if (maxTime > 24 * 60 * 60 * 1000) { // beyond 24 hours?
                        end.time(maxTime - (24 * 60 * 60 * 1000));
                }
        }

        return new UnzonedRange(start, end);
},

// Builds the "current" range when it is specified as an explicit duration.
// `unit` is the already-computed computeGreatestUnit value of duration.
// TODO: accept a MS-time instead of a moment `date`?
buildRangeFromDuration: function(date, direction, duration, unit) {
        var alignment = this.opt('dateAlignment');
        var start = date.clone();
        var end;
        var dateIncrementInput;
        var dateIncrementDuration;

        // if the view displays a single day or smaller
        if (duration.as('days') <= 1) {
                if (this.isHiddenDay(start)) {
                        start = this.skipHiddenDays(start, direction);
                        start.startOf('day');
                }
        }

        // compute what the alignment should be
        if (!alignment) {
                dateIncrementInput = this.opt('dateIncrement');

                if (dateIncrementInput) {
                        dateIncrementDuration = moment.duration(dateIncrementInput);

                        // use the smaller of the two units
                        if (dateIncrementDuration < duration) {
                                alignment = computeDurationGreatestUnit(dateIncrementDuration, dateIncrementInput);
                        }
                        else {
                                alignment = unit;
                        }
                }
                else {
                        alignment = unit;
                }
        }

        start.startOf(alignment);
        end = start.clone().add(duration);

        return new UnzonedRange(start, end);
},

// Builds the "current" range when a dayCount is specified.
// TODO: accept a MS-time instead of a moment `date`?
buildRangeFromDayCount: function(date, direction, dayCount) {
        var customAlignment = this.opt('dateAlignment');
        var runningCount = 0;
        var start = date.clone();
        var end;

        if (customAlignment) {
                start.startOf(customAlignment);
        }

        start.startOf('day');
        start = this.skipHiddenDays(start, direction);

        end = start.clone();
        do {
                end.add(1, 'day');
                if (!this.isHiddenDay(end)) {
                        runningCount++;
                }
        } while (runningCount < dayCount);

        return new UnzonedRange(start, end);
},

// Builds a normalized range object for the "visible" range,
// which is a way to define the currentUnzonedRange and activeUnzonedRange at the same time.
// TODO: accept a MS-time instead of a moment `date`?
buildCustomVisibleRange: function(date) {
        var visibleUnzonedRange = this.getUnzonedRangeOption(
                'visibleRange',
                this.calendar.applyTimezone(date) // correct zone. also generates new obj that avoids mutations
        );

        if (visibleUnzonedRange && (visibleUnzonedRange.startMs === null || visibleUnzonedRange.endMs === null)) {
                return null;
        }

        return visibleUnzonedRange;
},

// Computes the range that will represent the element/cells for *rendering*,
// but which may have voided days/times.
buildRenderRange: function(currentUnzonedRange, currentRangeUnit) {
        // cut off days in the currentUnzonedRange that are hidden
        return this.trimHiddenDays(currentUnzonedRange);
},

// Compute the duration value that should be added/substracted to the current date
// when a prev/next operation happens.
buildDateIncrement: function(fallback) {
        var dateIncrementInput = this.opt('dateIncrement');
        var customAlignment;

        if (dateIncrementInput) {
                return moment.duration(dateIncrementInput);
        }
        else if ((customAlignment = this.opt('dateAlignment'))) {
                return moment.duration(1, customAlignment);
        }
        else if (fallback) {
                return fallback;
        }
        else {
                return moment.duration({ days: 1 });
        }
},

// Remove days from the beginning and end of the range that are computed as hidden.
trimHiddenDays: function(inputUnzonedRange) {
        var start = inputUnzonedRange.getStart();
        var end = inputUnzonedRange.getEnd();

        start = this.skipHiddenDays(start);
        end = this.skipHiddenDays(end, -1, true);

        return new UnzonedRange(start, end);
},

// Compute the number of the give units in the "current" range.
// Will return a floating-point number. Won't round.
currentRangeAs: function(unit) {
        var currentUnzonedRange = this.currentUnzonedRange;

        return moment.utc(currentUnzonedRange.endMs).diff(
                moment.utc(currentUnzonedRange.startMs),
                unit,
                true
        );
},

// For ChronoComponent::getDayClasses
isDateInOtherMonth: function(date) {
        return false;
},

// Arguments after name will be forwarded to a hypothetical function value
// WARNING: passed-in arguments will be given to generator functions as-is and can cause side-effects.
// Always clone your objects if you fear mutation.
getUnzonedRangeOption: function(name) {
        var val = this.opt(name);

        if (typeof val === 'function') {
                val = val.apply(
                        null,
                        Array.prototype.slice.call(arguments, 1)
                );
        }

        if (val) {
                return this.calendar.parseUnzonedRange(val);
        }
},

/* Hidden Days
------------------------------------------------------------------------------------------------------------------*/

// Initializes internal variables related to calculating hidden days-of-week
initHiddenDays: function() {
        var hiddenDays = this.opt('hiddenDays') || []; // array of day-of-week indices that are hidden
        var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
        var dayCnt = 0;
        var i;

        if (this.opt('weekends') === false) {
                hiddenDays.push(0, 6); // 0=sunday, 6=saturday
        }

        for (i = 0; i < 7; i++) {
                if (
                        !(isHiddenDayHash[i] = $.inArray(i, hiddenDays) !== -1)
                ) {
                        dayCnt++;
                }
        }

        if (!dayCnt) {
                throw 'invalid hiddenDays'; // all days were hidden? bad.
        }

        this.isHiddenDayHash = isHiddenDayHash;
},

// Is the current day hidden?
// `day` is a day-of-week index (0-6), or a Moment
isHiddenDay: function(day) {
        if (moment.isMoment(day)) {
                day = day.day();
        }
        return this.isHiddenDayHash[day];
},

// Incrementing the current day until it is no longer a hidden day, returning a copy.
// DOES NOT CONSIDER validUnzonedRange!
// If the initial value of `date` is not a hidden day, don't do anything.
// Pass `isExclusive` as `true` if you are dealing with an end date.
// `inc` defaults to `1` (increment one day forward each time)
skipHiddenDays: function(date, inc, isExclusive) {
        var out = date.clone();
        inc = inc || 1;
        while (
                this.isHiddenDayHash[(out.day() + (isExclusive ? inc : 0) + 7) % 7]
        ) {
                out.add(inc, 'days');
        }
        return out;
}

});

;;

/* Embodies a div that has potential scrollbars */ var Scroller = FC.Scroller = Class.extend({

el: null, // the guaranteed outer element
scrollEl: null, // the element with the scrollbars
overflowX: null,
overflowY: null,

constructor: function(options) {
        options = options || {};
        this.overflowX = options.overflowX || options.overflow || 'auto';
        this.overflowY = options.overflowY || options.overflow || 'auto';
},

render: function() {
        this.el = this.renderEl();
        this.applyOverflow();
},

renderEl: function() {
        return (this.scrollEl = $('<div class="fc-scroller"></div>'));
},

// sets to natural height, unlocks overflow
clear: function() {
        this.setHeight('auto');
        this.applyOverflow();
},

destroy: function() {
        this.el.remove();
},

// Overflow
// -----------------------------------------------------------------------------------------------------------------

applyOverflow: function() {
        this.scrollEl.css({
                'overflow-x': this.overflowX,
                'overflow-y': this.overflowY
        });
},

// Causes any 'auto' overflow values to resolves to 'scroll' or 'hidden'.
// Useful for preserving scrollbar widths regardless of future resizes.
// Can pass in scrollbarWidths for optimization.
lockOverflow: function(scrollbarWidths) {
        var overflowX = this.overflowX;
        var overflowY = this.overflowY;

        scrollbarWidths = scrollbarWidths || this.getScrollbarWidths();

        if (overflowX === 'auto') {
                overflowX = (
                                scrollbarWidths.top || scrollbarWidths.bottom || // horizontal scrollbars?
                                // OR scrolling pane with massless scrollbars?
                                this.scrollEl[0].scrollWidth - 1 > this.scrollEl[0].clientWidth
                                        // subtract 1 because of IE off-by-one issue
                        ) ? 'scroll' : 'hidden';
        }

        if (overflowY === 'auto') {
                overflowY = (
                                scrollbarWidths.left || scrollbarWidths.right || // vertical scrollbars?
                                // OR scrolling pane with massless scrollbars?
                                this.scrollEl[0].scrollHeight - 1 > this.scrollEl[0].clientHeight
                                        // subtract 1 because of IE off-by-one issue
                        ) ? 'scroll' : 'hidden';
        }

        this.scrollEl.css({ 'overflow-x': overflowX, 'overflow-y': overflowY });
},

// Getters / Setters
// -----------------------------------------------------------------------------------------------------------------

setHeight: function(height) {
        this.scrollEl.height(height);
},

getScrollTop: function() {
        return this.scrollEl.scrollTop();
},

setScrollTop: function(top) {
        this.scrollEl.scrollTop(top);
},

getClientWidth: function() {
        return this.scrollEl[0].clientWidth;
},

getClientHeight: function() {
        return this.scrollEl[0].clientHeight;
},

getScrollbarWidths: function() {
        return getScrollbarWidths(this.scrollEl);
}

});

;; function Iterator(items) {

this.items = items || [];

}

/* Calls a method on every item passing the arguments through */ Iterator.prototype.proxyCall = function(methodName) {

var args = Array.prototype.slice.call(arguments, 1);
var results = [];

this.items.forEach(function(item) {
    results.push(item[methodName].apply(item, args));
});

return results;

};

;;

/* Toolbar with buttons and title ———————————————————————————————————————-*/

function Toolbar(calendar, toolbarOptions) {

var t = this;

// exports
t.setToolbarOptions = setToolbarOptions;
t.render = render;
t.removeElement = removeElement;
t.updateTitle = updateTitle;
t.activateButton = activateButton;
t.deactivateButton = deactivateButton;
t.disableButton = disableButton;
t.enableButton = enableButton;
t.getViewsWithButtons = getViewsWithButtons;
t.el = null; // mirrors local `el`

// locals
var el;
var viewsWithButtons = [];

// method to update toolbar-specific options, not calendar-wide options
function setToolbarOptions(newToolbarOptions) {
        toolbarOptions = newToolbarOptions;
}

// can be called repeatedly and will rerender
function render() {
        var sections = toolbarOptions.layout;

        if (sections) {
                if (!el) {
                        el = this.el = $("<div class='fc-toolbar "+ toolbarOptions.extraClasses + "'/>");
                }
                else {
                        el.empty();
                }
                el.append(renderSection('left'))
                        .append(renderSection('right'))
                        .append(renderSection('center'))
                        .append('<div class="fc-clear"/>');
        }
        else {
                removeElement();
        }
}

function removeElement() {
        if (el) {
                el.remove();
                el = t.el = null;
        }
}

function renderSection(position) {
        var theme = calendar.theme;
        var sectionEl = $('<div class="fc-' + position + '"/>');
        var buttonStr = toolbarOptions.layout[position];
        var calendarCustomButtons = calendar.opt('customButtons') || {};
        var calendarButtonTextOverrides = calendar.overrides.buttonText || {};
        var calendarButtonText = calendar.opt('buttonText') || {};

        if (buttonStr) {
                $.each(buttonStr.split(' '), function(i) {
                        var groupChildren = $();
                        var isOnlyButtons = true;
                        var groupEl;

                        $.each(this.split(','), function(j, buttonName) {
                                var customButtonProps;
                                var viewSpec;
                                var buttonClick;
                                var buttonIcon; // only one of these will be set
                                var buttonText; // "
                                var buttonInnerHtml;
                                var buttonClasses;
                                var buttonEl;

                                if (buttonName == 'title') {
                                        groupChildren = groupChildren.add($('<h2>&nbsp;</h2>')); // we always want it to take up height
                                        isOnlyButtons = false;
                                }
                                else {

                                        if ((customButtonProps = calendarCustomButtons[buttonName])) {
                                                buttonClick = function(ev) {
                                                        if (customButtonProps.click) {
                                                                customButtonProps.click.call(buttonEl[0], ev);
                                                        }
                                                };
                                                (buttonIcon = theme.getCustomButtonIconClass(customButtonProps)) ||
                                                (buttonIcon = theme.getIconClass(buttonName)) ||
                                                (buttonText = customButtonProps.text); // jshint ignore:line
                                        }
                                        else if ((viewSpec = calendar.getViewSpec(buttonName))) {
                                                viewsWithButtons.push(buttonName);
                                                buttonClick = function() {
                                                        calendar.changeView(buttonName);
                                                };
                                                (buttonText = viewSpec.buttonTextOverride) ||
                                                (buttonIcon = theme.getIconClass(buttonName)) ||
                                                (buttonText = viewSpec.buttonTextDefault); // jshint ignore:line
                                        }
                                        else if (calendar[buttonName]) { // a calendar method
                                                buttonClick = function() {
                                                        calendar[buttonName]();
                                                };
                                                (buttonText = calendarButtonTextOverrides[buttonName]) ||
                                                (buttonIcon = theme.getIconClass(buttonName)) ||
                                                (buttonText = calendarButtonText[buttonName]); // jshint ignore:line
                                                //            ^ everything else is considered default
                                        }

                                        if (buttonClick) {

                                                buttonClasses = [
                                                        'fc-' + buttonName + '-button',
                                                        theme.getClass('button'),
                                                        theme.getClass('stateDefault')
                                                ];

                                                if (buttonText) {
                                                        buttonInnerHtml = htmlEscape(buttonText);
                                                }
                                                else if (buttonIcon) {
                                                        buttonInnerHtml = "<span class='" + buttonIcon + "'></span>";
                                                }

                                                buttonEl = $( // type="button" so that it doesn't submit a form
                                                        '<button type="button" class="' + buttonClasses.join(' ') + '">' +
                                                                buttonInnerHtml +
                                                        '</button>'
                                                        )
                                                        .click(function(ev) {
                                                                // don't process clicks for disabled buttons
                                                                if (!buttonEl.hasClass(theme.getClass('stateDisabled'))) {

                                                                        buttonClick(ev);

                                                                        // after the click action, if the button becomes the "active" tab, or disabled,
                                                                        // it should never have a hover class, so remove it now.
                                                                        if (
                                                                                buttonEl.hasClass(theme.getClass('stateActive')) ||
                                                                                buttonEl.hasClass(theme.getClass('stateDisabled'))
                                                                        ) {
                                                                                buttonEl.removeClass(theme.getClass('stateHover'));
                                                                        }
                                                                }
                                                        })
                                                        .mousedown(function() {
                                                                // the *down* effect (mouse pressed in).
                                                                // only on buttons that are not the "active" tab, or disabled
                                                                buttonEl
                                                                        .not('.' + theme.getClass('stateActive'))
                                                                        .not('.' + theme.getClass('stateDisabled'))
                                                                        .addClass(theme.getClass('stateDown'));
                                                        })
                                                        .mouseup(function() {
                                                                // undo the *down* effect
                                                                buttonEl.removeClass(theme.getClass('stateDown'));
                                                        })
                                                        .hover(
                                                                function() {
                                                                        // the *hover* effect.
                                                                        // only on buttons that are not the "active" tab, or disabled
                                                                        buttonEl
                                                                                .not('.' + theme.getClass('stateActive'))
                                                                                .not('.' + theme.getClass('stateDisabled'))
                                                                                .addClass(theme.getClass('stateHover'));
                                                                },
                                                                function() {
                                                                        // undo the *hover* effect
                                                                        buttonEl
                                                                                .removeClass(theme.getClass('stateHover'))
                                                                                .removeClass(theme.getClass('stateDown')); // if mouseleave happens before mouseup
                                                                }
                                                        );

                                                groupChildren = groupChildren.add(buttonEl);
                                        }
                                }
                        });

                        if (isOnlyButtons) {
                                groupChildren
                                        .first().addClass(theme.getClass('cornerLeft')).end()
                                        .last().addClass(theme.getClass('cornerRight')).end();
                        }

                        if (groupChildren.length > 1) {
                                groupEl = $('<div/>');
                                if (isOnlyButtons) {
                                        groupEl.addClass(theme.getClass('buttonGroup'));
                                }
                                groupEl.append(groupChildren);
                                sectionEl.append(groupEl);
                        }
                        else {
                                sectionEl.append(groupChildren); // 1 or 0 children
                        }
                });
        }

        return sectionEl;
}

function updateTitle(text) {
        if (el) {
                el.find('h2').text(text);
        }
}

function activateButton(buttonName) {
        if (el) {
                el.find('.fc-' + buttonName + '-button')
                        .addClass(calendar.theme.getClass('stateActive'));
        }
}

function deactivateButton(buttonName) {
        if (el) {
                el.find('.fc-' + buttonName + '-button')
                        .removeClass(calendar.theme.getClass('stateActive'));
        }
}

function disableButton(buttonName) {
        if (el) {
                el.find('.fc-' + buttonName + '-button')
                        .prop('disabled', true)
                        .addClass(calendar.theme.getClass('stateDisabled'));
        }
}

function enableButton(buttonName) {
        if (el) {
                el.find('.fc-' + buttonName + '-button')
                        .prop('disabled', false)
                        .removeClass(calendar.theme.getClass('stateDisabled'));
        }
}

function getViewsWithButtons() {
        return viewsWithButtons;
}

}

;;

var Calendar = FC.Calendar = Class.extend(EmitterMixin, {

view: null, // current View object
viewsByType: null, // holds all instantiated view instances, current or not
currentDate: null, // unzoned moment. private (public API should use getDate instead)
theme: null,
loadingLevel: 0, // number of simultaneous loading tasks

constructor: function(el, overrides) {

        // declare the current calendar instance relies on GlobalEmitter. needed for garbage collection.
        // unneeded() is called in destroy.
        GlobalEmitter.needed();

        this.el = el;
        this.viewsByType = {};
        this.viewSpecCache = {};

        this.initOptionsInternals(overrides);
        this.initMomentInternals(); // needs to happen after options hash initialized
        this.initCurrentDate();
        this.initEventManager();

        EventManager.call(this); // needs options immediately
        this.initialize();
},

// Subclasses can override this for initialization logic after the constructor has been called
initialize: function() {
},

// Public API
// -----------------------------------------------------------------------------------------------------------------

getView: function() {
        return this.view;
},

publiclyTrigger: function(name, triggerInfo) {
        var optHandler = this.opt(name);
        var context;
        var args;

        if ($.isPlainObject(triggerInfo)) {
                context = triggerInfo.context;
                args = triggerInfo.args;
        }
        else if ($.isArray(triggerInfo)) {
                args = triggerInfo;
        }

        if (context == null) {
                context = this.el[0]; // fallback context
        }

        if (!args) {
                args = [];
        }

        this.triggerWith(name, context, args); // Emitter's method

        if (optHandler) {
                return optHandler.apply(context, args);
        }
},

hasPublicHandlers: function(name) {
        return this.hasHandlers(name) ||
                this.opt(name); // handler specified in options
},

// View
// -----------------------------------------------------------------------------------------------------------------

// Given a view name for a custom view or a standard view, creates a ready-to-go View object
instantiateView: function(viewType) {
        var spec = this.getViewSpec(viewType);

        return new spec['class'](this, spec);
},

// Returns a boolean about whether the view is okay to instantiate at some point
isValidViewType: function(viewType) {
        return Boolean(this.getViewSpec(viewType));
},

changeView: function(viewName, dateOrRange) {

        if (dateOrRange) {

                if (dateOrRange.start && dateOrRange.end) { // a range
                        this.recordOptionOverrides({ // will not rerender
                                visibleRange: dateOrRange
                        });
                }
                else { // a date
                        this.currentDate = this.moment(dateOrRange).stripZone(); // just like gotoDate
                }
        }

        this.renderView(viewName);
},

// Forces navigation to a view for the given date.
// `viewType` can be a specific view name or a generic one like "week" or "day".
zoomTo: function(newDate, viewType) {
        var spec;

        viewType = viewType || 'day'; // day is default zoom
        spec = this.getViewSpec(viewType) || this.getUnitViewSpec(viewType);

        this.currentDate = newDate.clone();
        this.renderView(spec ? spec.type : null);
},

// Current Date
// -----------------------------------------------------------------------------------------------------------------

initCurrentDate: function() {
        var defaultDateInput = this.opt('defaultDate');

        // compute the initial ambig-timezone date
        if (defaultDateInput != null) {
                this.currentDate = this.moment(defaultDateInput).stripZone();
        }
        else {
                this.currentDate = this.getNow(); // getNow already returns unzoned
        }
},

reportViewDatesChanged: function(view, dateProfile) {
        this.currentDate = dateProfile.date; // might have been constrained by view dates
        this.setToolbarsTitle(view.title);
        this.updateToolbarButtons();
},

prev: function() {
        var prevInfo = this.view.buildPrevDateProfile(this.currentDate);

        if (prevInfo.isValid) {
                this.currentDate = prevInfo.date;
                this.renderView();
        }
},

next: function() {
        var nextInfo = this.view.buildNextDateProfile(this.currentDate);

        if (nextInfo.isValid) {
                this.currentDate = nextInfo.date;
                this.renderView();
        }
},

prevYear: function() {
        this.currentDate.add(-1, 'years');
        this.renderView();
},

nextYear: function() {
        this.currentDate.add(1, 'years');
        this.renderView();
},

today: function() {
        this.currentDate = this.getNow(); // should deny like prev/next?
        this.renderView();
},

gotoDate: function(zonedDateInput) {
        this.currentDate = this.moment(zonedDateInput).stripZone();
        this.renderView();
},

incrementDate: function(delta) {
        this.currentDate.add(moment.duration(delta));
        this.renderView();
},

// for external API
getDate: function() {
        return this.applyTimezone(this.currentDate); // infuse the calendar's timezone
},

// Loading Triggering
// -----------------------------------------------------------------------------------------------------------------

// Should be called when any type of async data fetching begins
pushLoading: function() {
        if (!(this.loadingLevel++)) {
                this.publiclyTrigger('loading', [ true, this.view ]);
        }
},

// Should be called when any type of async data fetching completes
popLoading: function() {
        if (!(--this.loadingLevel)) {
                this.publiclyTrigger('loading', [ false, this.view ]);
        }
},

// Selection
// -----------------------------------------------------------------------------------------------------------------

// this public method receives start/end dates in any format, with any timezone
select: function(zonedStartInput, zonedEndInput) {
        this.view.select(
                this.buildSelectFootprint.apply(this, arguments)
        );
},

unselect: function() { // safe to be called before renderView
        if (this.view) {
                this.view.unselect();
        }
},

// Given arguments to the select method in the API, returns a span (unzoned start/end and other info)
buildSelectFootprint: function(zonedStartInput, zonedEndInput) {
        var start = this.moment(zonedStartInput).stripZone();
        var end;

        if (zonedEndInput) {
                end = this.moment(zonedEndInput).stripZone();
        }
        else if (start.hasTime()) {
                end = start.clone().add(this.defaultTimedEventDuration);
        }
        else {
                end = start.clone().add(this.defaultAllDayEventDuration);
        }

        return new ComponentFootprint(
                new UnzonedRange(start, end),
                !start.hasTime()
        );
},

// Misc
// -----------------------------------------------------------------------------------------------------------------

// will return `null` if invalid range
parseUnzonedRange: function(rangeInput) {
        var start = null;
        var end = null;

        if (rangeInput.start) {
                start = this.moment(rangeInput.start).stripZone();
        }

        if (rangeInput.end) {
                end = this.moment(rangeInput.end).stripZone();
        }

        if (!start && !end) {
                return null;
        }

        if (start && end && end.isBefore(start)) {
                return null;
        }

        return new UnzonedRange(start, end);
},

rerenderEvents: function() { // API method. destroys old events if previously rendered.
        if (this.elementVisible()) {
                this.view.flash('displayingEvents');
        }
},

initEventManager: function() {
        var _this = this;
        var eventManager = new EventManager(this);
        var rawSources = this.opt('eventSources') || [];
        var singleRawSource = this.opt('events');

        this.eventManager = eventManager;

        if (singleRawSource) {
                rawSources.unshift(singleRawSource);
        }

        eventManager.on('release', function(eventsPayload) {
                _this.trigger('eventsReset', eventsPayload);
        });

        eventManager.freeze();

        rawSources.forEach(function(rawSource) {
                var source = EventSourceParser.parse(rawSource, _this);

                if (source) {
                        eventManager.addSource(source);
                }
        });

        eventManager.thaw();
},

requestEvents: function(start, end) {
        return this.eventManager.requestEvents(
                start,
                end,
                this.opt('timezone'),
                !this.opt('lazyFetching')
        );
}

});

;; /* Options binding/triggering system. */ Calendar.mixin({

dirDefaults: null, // option defaults related to LTR or RTL
localeDefaults: null, // option defaults related to current locale
overrides: null, // option overrides given to the fullCalendar constructor
dynamicOverrides: null, // options set with dynamic setter method. higher precedence than view overrides.
optionsModel: null, // all defaults combined with overrides

initOptionsInternals: function(overrides) {
        this.overrides = $.extend({}, overrides); // make a copy
        this.dynamicOverrides = {};
        this.optionsModel = new Model();

        this.populateOptionsHash();
},

// public getter/setter
option: function(name, value) {
        var newOptionHash;

        if (typeof name === 'string') {
                if (value === undefined) { // getter
                        return this.optionsModel.get(name);
                }
                else { // setter for individual option
                        newOptionHash = {};
                        newOptionHash[name] = value;
                        this.setOptions(newOptionHash);
                }
        }
        else if (typeof name === 'object') { // compound setter with object input
                this.setOptions(name);
        }
},

// private getter
opt: function(name) {
        return this.optionsModel.get(name);
},

setOptions: function(newOptionHash) {
        var optionCnt = 0;
        var optionName;

        this.recordOptionOverrides(newOptionHash); // will trigger optionsModel watchers

        for (optionName in newOptionHash) {
                optionCnt++;
        }

        // special-case handling of single option change.
        // if only one option change, `optionName` will be its name.
        if (optionCnt === 1) {
                if (optionName === 'height' || optionName === 'contentHeight' || optionName === 'aspectRatio') {
                        this.updateSize(true); // true = allow recalculation of height
                        return;
                }
                else if (optionName === 'defaultDate') {
                        return; // can't change date this way. use gotoDate instead
                }
                else if (optionName === 'businessHours') {
                        if (this.view) {
                                this.view.unrenderBusinessHours();
                                this.view.renderBusinessHours();
                        }
                        return;
                }
                else if (optionName === 'timezone') {
                        this.view.flash('initialEvents');
                        return;
                }
        }

        // catch-all. rerender the header and footer and rebuild/rerender the current view
        this.renderHeader();
        this.renderFooter();

        // even non-current views will be affected by this option change. do before rerender
        // TODO: detangle
        this.viewsByType = {};

        this.reinitView();
},

// Computes the flattened options hash for the calendar and assigns to `this.options`.
// Assumes this.overrides and this.dynamicOverrides have already been initialized.
populateOptionsHash: function() {
        var locale, localeDefaults;
        var isRTL, dirDefaults;
        var rawOptions;

        locale = firstDefined( // explicit locale option given?
                this.dynamicOverrides.locale,
                this.overrides.locale
        );
        localeDefaults = localeOptionHash[locale];
        if (!localeDefaults) { // explicit locale option not given or invalid?
                locale = Calendar.defaults.locale;
                localeDefaults = localeOptionHash[locale] || {};
        }

        isRTL = firstDefined( // based on options computed so far, is direction RTL?
                this.dynamicOverrides.isRTL,
                this.overrides.isRTL,
                localeDefaults.isRTL,
                Calendar.defaults.isRTL
        );
        dirDefaults = isRTL ? Calendar.rtlDefaults : {};

        this.dirDefaults = dirDefaults;
        this.localeDefaults = localeDefaults;

        rawOptions = mergeOptions([ // merge defaults and overrides. lowest to highest precedence
                Calendar.defaults, // global defaults
                dirDefaults,
                localeDefaults,
                this.overrides,
                this.dynamicOverrides
        ]);
        populateInstanceComputableOptions(rawOptions); // fill in gaps with computed options

        this.optionsModel.reset(rawOptions);
},

// stores the new options internally, but does not rerender anything.
recordOptionOverrides: function(newOptionHash) {
        var optionName;

        for (optionName in newOptionHash) {
                this.dynamicOverrides[optionName] = newOptionHash[optionName];
        }

        this.viewSpecCache = {}; // the dynamic override invalidates the options in this cache, so just clear it
        this.populateOptionsHash(); // this.options needs to be recomputed after the dynamic override
}

});

;;

Calendar.mixin({

defaultAllDayEventDuration: null,
defaultTimedEventDuration: null,
localeData: null,

initMomentInternals: function() {
        var _this = this;

        this.defaultAllDayEventDuration = moment.duration(this.opt('defaultAllDayEventDuration'));
        this.defaultTimedEventDuration = moment.duration(this.opt('defaultTimedEventDuration'));

        // Called immediately, and when any of the options change.
        // Happens before any internal objects rebuild or rerender, because this is very core.
        this.optionsModel.watch('buildingMomentLocale', [
                '?locale', '?monthNames', '?monthNamesShort', '?dayNames', '?dayNamesShort',
                '?firstDay', '?weekNumberCalculation'
        ], function(opts) {
                var weekNumberCalculation = opts.weekNumberCalculation;
                var firstDay = opts.firstDay;
                var _week;

                // normalize
                if (weekNumberCalculation === 'iso') {
                        weekNumberCalculation = 'ISO'; // normalize
                }

                var localeData = Object.create( // make a cheap copy
                        getMomentLocaleData(opts.locale) // will fall back to en
                );

                if (opts.monthNames) {
                        localeData._months = opts.monthNames;
                }
                if (opts.monthNamesShort) {
                        localeData._monthsShort = opts.monthNamesShort;
                }
                if (opts.dayNames) {
                        localeData._weekdays = opts.dayNames;
                }
                if (opts.dayNamesShort) {
                        localeData._weekdaysShort = opts.dayNamesShort;
                }

                if (firstDay == null && weekNumberCalculation === 'ISO') {
                        firstDay = 1;
                }
                if (firstDay != null) {
                        _week = Object.create(localeData._week); // _week: { dow: # }
                        _week.dow = firstDay;
                        localeData._week = _week;
                }

                if ( // whitelist certain kinds of input
                        weekNumberCalculation === 'ISO' ||
                        weekNumberCalculation === 'local' ||
                        typeof weekNumberCalculation === 'function'
                ) {
                        localeData._fullCalendar_weekCalc = weekNumberCalculation; // moment-ext will know what to do with it
                }

                _this.localeData = localeData;

                // If the internal current date object already exists, move to new locale.
                // We do NOT need to do this technique for event dates, because this happens when converting to "segments".
                if (_this.currentDate) {
                        _this.localizeMoment(_this.currentDate); // sets to localeData
                }
        });
},

// Builds a moment using the settings of the current calendar: timezone and locale.
// Accepts anything the vanilla moment() constructor accepts.
moment: function() {
        var mom;

        if (this.opt('timezone') === 'local') {
                mom = FC.moment.apply(null, arguments);

                // Force the moment to be local, because FC.moment doesn't guarantee it.
                if (mom.hasTime()) { // don't give ambiguously-timed moments a local zone
                        mom.local();
                }
        }
        else if (this.opt('timezone') === 'UTC') {
                mom = FC.moment.utc.apply(null, arguments); // process as UTC
        }
        else {
                mom = FC.moment.parseZone.apply(null, arguments); // let the input decide the zone
        }

        this.localizeMoment(mom); // TODO

        return mom;
},

msToMoment: function(ms, forceAllDay) {
        var mom = FC.moment.utc(ms); // TODO: optimize by using Date.UTC

        if (forceAllDay) {
                mom.stripTime();
        }
        else {
                mom = this.applyTimezone(mom); // may or may not apply locale
        }

        this.localizeMoment(mom);

        return mom;
},

msToUtcMoment: function(ms, forceAllDay) {
        var mom = FC.moment.utc(ms); // TODO: optimize by using Date.UTC

        if (forceAllDay) {
                mom.stripTime();
        }

        this.localizeMoment(mom);

        return mom;
},

// Updates the given moment's locale settings to the current calendar locale settings.
localizeMoment: function(mom) {
        mom._locale = this.localeData;
},

// Returns a boolean about whether or not the calendar knows how to calculate
// the timezone offset of arbitrary dates in the current timezone.
getIsAmbigTimezone: function() {
        return this.opt('timezone') !== 'local' && this.opt('timezone') !== 'UTC';
},

// Returns a copy of the given date in the current timezone. Has no effect on dates without times.
applyTimezone: function(date) {
        if (!date.hasTime()) {
                return date.clone();
        }

        var zonedDate = this.moment(date.toArray());
        var timeAdjust = date.time() - zonedDate.time();
        var adjustedZonedDate;

        // Safari sometimes has problems with this coersion when near DST. Adjust if necessary. (bug #2396)
        if (timeAdjust) { // is the time result different than expected?
                adjustedZonedDate = zonedDate.clone().add(timeAdjust); // add milliseconds
                if (date.time() - adjustedZonedDate.time() === 0) { // does it match perfectly now?
                        zonedDate = adjustedZonedDate;
                }
        }

        return zonedDate;
},

/*
Assumes the footprint is non-open-ended.
*/
footprintToDateProfile: function(componentFootprint, ignoreEnd) {
        var start = FC.moment.utc(componentFootprint.unzonedRange.startMs);
        var end;

        if (!ignoreEnd) {
                end = FC.moment.utc(componentFootprint.unzonedRange.endMs);
        }

        if (componentFootprint.isAllDay) {
                start.stripTime();

                if (end) {
                        end.stripTime();
                }
        }
        else {
                start = this.applyTimezone(start);

                if (end) {
                        end = this.applyTimezone(end);
                }
        }

        return new EventDateProfile(start, end, this);
},

// Returns a moment for the current date, as defined by the client's computer or from the `now` option.
// Will return an moment with an ambiguous timezone.
getNow: function() {
        var now = this.opt('now');
        if (typeof now === 'function') {
                now = now();
        }
        return this.moment(now).stripZone();
},

// Produces a human-readable string for the given duration.
// Side-effect: changes the locale of the given duration.
humanizeDuration: function(duration) {
        return duration.locale(this.opt('locale')).humanize();
},

// Event-Specific Date Utilities. TODO: move
// -----------------------------------------------------------------------------------------------------------------

// Get an event's normalized end date. If not present, calculate it from the defaults.
getEventEnd: function(event) {
        if (event.end) {
                return event.end.clone();
        }
        else {
                return this.getDefaultEventEnd(event.allDay, event.start);
        }
},

// Given an event's allDay status and start date, return what its fallback end date should be.
// TODO: rename to computeDefaultEventEnd
getDefaultEventEnd: function(allDay, zonedStart) {
        var end = zonedStart.clone();

        if (allDay) {
                end.stripTime().add(this.defaultAllDayEventDuration);
        }
        else {
                end.add(this.defaultTimedEventDuration);
        }

        if (this.getIsAmbigTimezone()) {
                end.stripZone(); // we don't know what the tzo should be
        }

        return end;
}

});

;;

Calendar.mixin({

viewSpecCache: null, // cache of view definitions (initialized in Calendar.js)

// Gets information about how to create a view. Will use a cache.
getViewSpec: function(viewType) {
        var cache = this.viewSpecCache;

        return cache[viewType] || (cache[viewType] = this.buildViewSpec(viewType));
},

// Given a duration singular unit, like "week" or "day", finds a matching view spec.
// Preference is given to views that have corresponding buttons.
getUnitViewSpec: function(unit) {
        var viewTypes;
        var i;
        var spec;

        if ($.inArray(unit, unitsDesc) != -1) {

                // put views that have buttons first. there will be duplicates, but oh well
                viewTypes = this.header.getViewsWithButtons(); // TODO: include footer as well?
                $.each(FC.views, function(viewType) { // all views
                        viewTypes.push(viewType);
                });

                for (i = 0; i < viewTypes.length; i++) {
                        spec = this.getViewSpec(viewTypes[i]);
                        if (spec) {
                                if (spec.singleUnit == unit) {
                                        return spec;
                                }
                        }
                }
        }
},

// Builds an object with information on how to create a given view
buildViewSpec: function(requestedViewType) {
        var viewOverrides = this.overrides.views || {};
        var specChain = []; // for the view. lowest to highest priority
        var defaultsChain = []; // for the view. lowest to highest priority
        var overridesChain = []; // for the view. lowest to highest priority
        var viewType = requestedViewType;
        var spec; // for the view
        var overrides; // for the view
        var durationInput;
        var duration;
        var unit;

        // iterate from the specific view definition to a more general one until we hit an actual View class
        while (viewType) {
                spec = fcViews[viewType];
                overrides = viewOverrides[viewType];
                viewType = null; // clear. might repopulate for another iteration

                if (typeof spec === 'function') { // TODO: deprecate
                        spec = { 'class': spec };
                }

                if (spec) {
                        specChain.unshift(spec);
                        defaultsChain.unshift(spec.defaults || {});
                        durationInput = durationInput || spec.duration;
                        viewType = viewType || spec.type;
                }

                if (overrides) {
                        overridesChain.unshift(overrides); // view-specific option hashes have options at zero-level
                        durationInput = durationInput || overrides.duration;
                        viewType = viewType || overrides.type;
                }
        }

        spec = mergeProps(specChain);
        spec.type = requestedViewType;
        if (!spec['class']) {
                return false;
        }

        // fall back to top-level `duration` option
        durationInput = durationInput ||
                this.dynamicOverrides.duration ||
                this.overrides.duration;

        if (durationInput) {
                duration = moment.duration(durationInput);

                if (duration.valueOf()) { // valid?

                        unit = computeDurationGreatestUnit(duration, durationInput);

                        spec.duration = duration;
                        spec.durationUnit = unit;

                        // view is a single-unit duration, like "week" or "day"
                        // incorporate options for this. lowest priority
                        if (duration.as(unit) === 1) {
                                spec.singleUnit = unit;
                                overridesChain.unshift(viewOverrides[unit] || {});
                        }
                }
        }

        spec.defaults = mergeOptions(defaultsChain);
        spec.overrides = mergeOptions(overridesChain);

        this.buildViewSpecOptions(spec);
        this.buildViewSpecButtonText(spec, requestedViewType);

        return spec;
},

// Builds and assigns a view spec's options object from its already-assigned defaults and overrides
buildViewSpecOptions: function(spec) {
        spec.options = mergeOptions([ // lowest to highest priority
                Calendar.defaults, // global defaults
                spec.defaults, // view's defaults (from ViewSubclass.defaults)
                this.dirDefaults,
                this.localeDefaults, // locale and dir take precedence over view's defaults!
                this.overrides, // calendar's overrides (options given to constructor)
                spec.overrides, // view's overrides (view-specific options)
                this.dynamicOverrides // dynamically set via setter. highest precedence
        ]);
        populateInstanceComputableOptions(spec.options);
},

// Computes and assigns a view spec's buttonText-related options
buildViewSpecButtonText: function(spec, requestedViewType) {

        // given an options object with a possible `buttonText` hash, lookup the buttonText for the
        // requested view, falling back to a generic unit entry like "week" or "day"
        function queryButtonText(options) {
                var buttonText = options.buttonText || {};
                return buttonText[requestedViewType] ||
                        // view can decide to look up a certain key
                        (spec.buttonTextKey ? buttonText[spec.buttonTextKey] : null) ||
                        // a key like "month"
                        (spec.singleUnit ? buttonText[spec.singleUnit] : null);
        }

        // highest to lowest priority
        spec.buttonTextOverride =
                queryButtonText(this.dynamicOverrides) ||
                queryButtonText(this.overrides) || // constructor-specified buttonText lookup hash takes precedence
                spec.overrides.buttonText; // `buttonText` for view-specific options is a string

        // highest to lowest priority. mirrors buildViewSpecOptions
        spec.buttonTextDefault =
                queryButtonText(this.localeDefaults) ||
                queryButtonText(this.dirDefaults) ||
                spec.defaults.buttonText || // a single string. from ViewSubclass.defaults
                queryButtonText(Calendar.defaults) ||
                (spec.duration ? this.humanizeDuration(spec.duration) : null) || // like "3 days"
                requestedViewType; // fall back to given view name
}

});

;;

Calendar.mixin({

el: null,
contentEl: null,
suggestedViewHeight: null,
windowResizeProxy: null,
ignoreWindowResize: 0,

render: function() {
        if (!this.contentEl) {
                this.initialRender();
        }
        else if (this.elementVisible()) {
                // mainly for the public API
                this.calcSize();
                this.renderView();
        }
},

initialRender: function() {
        var _this = this;
        var el = this.el;

        el.addClass('fc');

        // event delegation for nav links
        el.on('click.fc', 'a[data-goto]', function(ev) {
                var anchorEl = $(this);
                var gotoOptions = anchorEl.data('goto'); // will automatically parse JSON
                var date = _this.moment(gotoOptions.date);
                var viewType = gotoOptions.type;

                // property like "navLinkDayClick". might be a string or a function
                var customAction = _this.view.opt('navLink' + capitaliseFirstLetter(viewType) + 'Click');

                if (typeof customAction === 'function') {
                        customAction(date, ev);
                }
                else {
                        if (typeof customAction === 'string') {
                                viewType = customAction;
                        }
                        _this.zoomTo(date, viewType);
                }
        });

        // called immediately, and upon option change
        this.optionsModel.watch('settingTheme', [ '?theme', '?themeSystem' ], function(opts) {
                var themeClass = ThemeRegistry.getThemeClass(opts.themeSystem || opts.theme);
                var theme = new themeClass(_this.optionsModel);
                var widgetClass = theme.getClass('widget');

                _this.theme = theme;

                if (widgetClass) {
                        el.addClass(widgetClass);
                }
        }, function() {
                var widgetClass = _this.theme.getClass('widget');

                _this.theme = null;

                if (widgetClass) {
                        el.removeClass(widgetClass);
                }
        });

        // called immediately, and upon option change.
        // HACK: locale often affects isRTL, so we explicitly listen to that too.
        this.optionsModel.watch('applyingDirClasses', [ '?isRTL', '?locale' ], function(opts) {
                el.toggleClass('fc-ltr', !opts.isRTL);
                el.toggleClass('fc-rtl', opts.isRTL);
        });

        this.contentEl = $("<div class='fc-view-container'/>").prependTo(el);

        this.initToolbars();
        this.renderHeader();
        this.renderFooter();
        this.renderView(this.opt('defaultView'));

        if (this.opt('handleWindowResize')) {
                $(window).resize(
                        this.windowResizeProxy = debounce( // prevents rapid calls
                                this.windowResize.bind(this),
                                this.opt('windowResizeDelay')
                        )
                );
        }
},

destroy: function() {

        if (this.view) {
                this.view.removeElement();

                // NOTE: don't null-out this.view in case API methods are called after destroy.
                // It is still the "current" view, just not rendered.
        }

        this.toolbarsManager.proxyCall('removeElement');
        this.contentEl.remove();
        this.el.removeClass('fc fc-ltr fc-rtl');

        // removes theme-related root className
        this.optionsModel.unwatch('settingTheme');

        this.el.off('.fc'); // unbind nav link handlers

        if (this.windowResizeProxy) {
                $(window).unbind('resize', this.windowResizeProxy);
                this.windowResizeProxy = null;
        }

        GlobalEmitter.unneeded();
},

elementVisible: function() {
        return this.el.is(':visible');
},

// View Rendering
// -----------------------------------------------------------------------------------

// Renders a view because of a date change, view-type change, or for the first time.
// If not given a viewType, keep the current view but render different dates.
// Accepts an optional scroll state to restore to.
renderView: function(viewType, forcedScroll) {

        this.ignoreWindowResize++;

        var needsClearView = this.view && viewType && this.view.type !== viewType;

        // if viewType is changing, remove the old view's rendering
        if (needsClearView) {
                this.freezeContentHeight(); // prevent a scroll jump when view element is removed
                this.clearView();
        }

        // if viewType changed, or the view was never created, create a fresh view
        if (!this.view && viewType) {
                this.view =
                        this.viewsByType[viewType] ||
                        (this.viewsByType[viewType] = this.instantiateView(viewType));

                this.view.setElement(
                        $("<div class='fc-view fc-" + viewType + "-view' />").appendTo(this.contentEl)
                );
                this.toolbarsManager.proxyCall('activateButton', viewType);
        }

        if (this.view) {

                if (forcedScroll) {
                        this.view.addForcedScroll(forcedScroll);
                }

                if (this.elementVisible()) {
                        this.view.setDate(this.currentDate);
                }
        }

        if (needsClearView) {
                this.thawContentHeight();
        }

        this.ignoreWindowResize--;
},

// Unrenders the current view and reflects this change in the Header.
// Unregsiters the `view`, but does not remove from viewByType hash.
clearView: function() {
        this.toolbarsManager.proxyCall('deactivateButton', this.view.type);
        this.view.removeElement();
        this.view = null;
},

// Destroys the view, including the view object. Then, re-instantiates it and renders it.
// Maintains the same scroll state.
// TODO: maintain any other user-manipulated state.
reinitView: function() {
        this.ignoreWindowResize++;
        this.freezeContentHeight();

        var viewType = this.view.type;
        var scrollState = this.view.queryScroll();
        this.clearView();
        this.calcSize();
        this.renderView(viewType, scrollState);

        this.thawContentHeight();
        this.ignoreWindowResize--;
},

// Resizing
// -----------------------------------------------------------------------------------

getSuggestedViewHeight: function() {
        if (this.suggestedViewHeight === null) {
                this.calcSize();
        }
        return this.suggestedViewHeight;
},

isHeightAuto: function() {
        return this.opt('contentHeight') === 'auto' || this.opt('height') === 'auto';
},

updateSize: function(shouldRecalc) {
        if (this.elementVisible()) {

                if (shouldRecalc) {
                        this._calcSize();
                }

                this.ignoreWindowResize++;
                this.view.updateSize(true); // isResize=true. will poll getSuggestedViewHeight() and isHeightAuto()
                this.ignoreWindowResize--;

                return true; // signal success
        }
},

calcSize: function() {
        if (this.elementVisible()) {
                this._calcSize();
        }
},

_calcSize: function() { // assumes elementVisible
        var contentHeightInput = this.opt('contentHeight');
        var heightInput = this.opt('height');

        if (typeof contentHeightInput === 'number') { // exists and not 'auto'
                this.suggestedViewHeight = contentHeightInput;
        }
        else if (typeof contentHeightInput === 'function') { // exists and is a function
                this.suggestedViewHeight = contentHeightInput();
        }
        else if (typeof heightInput === 'number') { // exists and not 'auto'
                this.suggestedViewHeight = heightInput - this.queryToolbarsHeight();
        }
        else if (typeof heightInput === 'function') { // exists and is a function
                this.suggestedViewHeight = heightInput() - this.queryToolbarsHeight();
        }
        else if (heightInput === 'parent') { // set to height of parent element
                this.suggestedViewHeight = this.el.parent().height() - this.queryToolbarsHeight();
        }
        else {
                this.suggestedViewHeight = Math.round(
                        this.contentEl.width() /
                        Math.max(this.opt('aspectRatio'), .5)
                );
        }
},

windowResize: function(ev) {
        if (
                !this.ignoreWindowResize &&
                ev.target === window && // so we don't process jqui "resize" events that have bubbled up
                this.view.renderUnzonedRange // view has already been rendered
        ) {
                if (this.updateSize(true)) {
                        this.publiclyTrigger('windowResize', [ this.view ]);
                }
        }
},

/* Height "Freezing"
-----------------------------------------------------------------------------*/

freezeContentHeight: function() {
        this.contentEl.css({
                width: '100%',
                height: this.contentEl.height(),
                overflow: 'hidden'
        });
},

thawContentHeight: function() {
        this.contentEl.css({
                width: '',
                height: '',
                overflow: ''
        });
}

});

;;

Calendar.mixin({

header: null,
footer: null,
toolbarsManager: null,

initToolbars: function() {
        this.header = new Toolbar(this, this.computeHeaderOptions());
        this.footer = new Toolbar(this, this.computeFooterOptions());
        this.toolbarsManager = new Iterator([ this.header, this.footer ]);
},

computeHeaderOptions: function() {
        return {
                extraClasses: 'fc-header-toolbar',
                layout: this.opt('header')
        };
},

computeFooterOptions: function() {
        return {
                extraClasses: 'fc-footer-toolbar',
                layout: this.opt('footer')
        };
},

// can be called repeatedly and Header will rerender
renderHeader: function() {
        var header = this.header;

        header.setToolbarOptions(this.computeHeaderOptions());
        header.render();

        if (header.el) {
                this.el.prepend(header.el);
        }
},

// can be called repeatedly and Footer will rerender
renderFooter: function() {
        var footer = this.footer;

        footer.setToolbarOptions(this.computeFooterOptions());
        footer.render();

        if (footer.el) {
                this.el.append(footer.el);
        }
},

setToolbarsTitle: function(title) {
        this.toolbarsManager.proxyCall('updateTitle', title);
},

updateToolbarButtons: function() {
        var now = this.getNow();
        var view = this.view;
        var todayInfo = view.buildDateProfile(now);
        var prevInfo = view.buildPrevDateProfile(this.currentDate);
        var nextInfo = view.buildNextDateProfile(this.currentDate);

        this.toolbarsManager.proxyCall(
                (todayInfo.isValid && !view.currentUnzonedRange.containsDate(now)) ?
                        'enableButton' :
                        'disableButton',
                'today'
        );

        this.toolbarsManager.proxyCall(
                prevInfo.isValid ?
                        'enableButton' :
                        'disableButton',
                'prev'
        );

        this.toolbarsManager.proxyCall(
                nextInfo.isValid ?
                        'enableButton' :
                        'disableButton',
                'next'
        );
},

queryToolbarsHeight: function() {
        return this.toolbarsManager.items.reduce(function(accumulator, toolbar) {
                var toolbarHeight = toolbar.el ? toolbar.el.outerHeight(true) : 0; // includes margin
                return accumulator + toolbarHeight;
        }, 0);
}

});

;;

var BUSINESS_HOUR_EVENT_DEFAULTS = {

start: '09:00',
end: '17:00',
dow: [ 1, 2, 3, 4, 5 ], // monday - friday
rendering: 'inverse-background'
// classNames are defined in businessHoursSegClasses

};

/* returns ComponentFootprint[] `businessHourDef` is optional. Use Calendar's setting if omitted. */ Calendar.prototype.buildCurrentBusinessFootprints = function(wholeDay) {

return this._buildCurrentBusinessFootprints(wholeDay, this.opt('businessHours'));

};

Calendar.prototype._buildCurrentBusinessFootprints = function(wholeDay, businessDefInput) {

var eventPeriod = this.eventManager.currentPeriod;
var businessInstanceGroup;

if (eventPeriod) {
        businessInstanceGroup = this.buildBusinessInstanceGroup(
                wholeDay,
                businessDefInput,
                eventPeriod.unzonedRange
        );

        if (businessInstanceGroup) {
                return this.eventInstancesToFootprints( // in Calendar.constraints.js
                        businessInstanceGroup.eventInstances
                );
        }
}

return [];

};

/* If there are business hours, and they are within range, returns populated EventInstanceGroup. If there are business hours, but they aren't within range, returns a zero-item EventInstanceGroup. If there are NOT business hours, returns undefined. */ Calendar.prototype.buildBusinessInstanceGroup = function(wholeDay, rawComplexDef, unzonedRange) {

var eventDefs = this.buildBusinessDefs(wholeDay, rawComplexDef);
var eventInstanceGroup;

if (eventDefs.length) {
        eventInstanceGroup = new EventInstanceGroup(
                eventDefsToEventInstances(eventDefs, unzonedRange)
        );

        // so that inverse-background rendering can happen even when no eventRanges in view
        eventInstanceGroup.explicitEventDef = eventDefs[0];

        return eventInstanceGroup;
}

};

Calendar.prototype.buildBusinessDefs = function(wholeDay, rawComplexDef) {

var rawDefs = [];
var requireDow = false;
var i;
var defs = [];

if (rawComplexDef === true) {
        rawDefs = [ {} ]; // will get BUSINESS_HOUR_EVENT_DEFAULTS verbatim
}
else if ($.isPlainObject(rawComplexDef)) {
        rawDefs = [ rawComplexDef ];
}
else if ($.isArray(rawComplexDef)) {
        rawDefs = rawComplexDef;
        requireDow = true; // every sub-definition NEEDS a day-of-week
}

for (i = 0; i < rawDefs.length; i++) {
        if (!requireDow || rawDefs[i].dow) {
                defs.push(
                        this.buildBusinessDef(wholeDay, rawDefs[i])
                );
        }
}

return defs;

};

Calendar.prototype.buildBusinessDef = function(wholeDay, rawDef) {

var fullRawDef = $.extend({}, BUSINESS_HOUR_EVENT_DEFAULTS, rawDef);

if (wholeDay) {
        fullRawDef.start = null;
        fullRawDef.end = null;
}

return RecurringEventDef.parse(
        fullRawDef,
        new EventSource(this) // dummy source
);

};

;;

/* determines if eventInstanceGroup is allowed, in relation to other EVENTS and business hours. */ Calendar.prototype.isEventInstanceGroupAllowed = function(eventInstanceGroup) {

var eventDef = eventInstanceGroup.getEventDef();
var eventFootprints = this.eventRangesToEventFootprints(eventInstanceGroup.getAllEventRanges());
var i;

var peerEventInstances = this.getPeerEventInstances(eventDef);
var peerEventRanges = eventInstancesToEventRanges(peerEventInstances);
var peerEventFootprints = this.eventRangesToEventFootprints(peerEventRanges);

var constraintVal = eventDef.getConstraint();
var overlapVal = eventDef.getOverlap();

var eventAllowFunc = this.opt('eventAllow');

for (i = 0; i < eventFootprints.length; i++) {
        if (
                !this.isFootprintAllowed(
                        eventFootprints[i].componentFootprint,
                        peerEventFootprints,
                        constraintVal,
                        overlapVal,
                        eventFootprints[i].eventInstance
                )
        ) {
                return false;
        }
}

if (eventAllowFunc) {
        for (i = 0; i < eventFootprints.length; i++) {
                if (
                        eventAllowFunc(
                                eventFootprints[i].componentFootprint.toLegacy(this),
                                eventFootprints[i].getEventLegacy()
                        ) === false
                ) {
                        return false;
                }
        }
}

return true;

};

Calendar.prototype.getPeerEventInstances = function(eventDef) {

return this.eventManager.getEventInstancesWithoutId(eventDef.id);

};

Calendar.prototype.isSelectionFootprintAllowed = function(componentFootprint) {

var peerEventInstances = this.eventManager.getEventInstances();
var peerEventRanges = eventInstancesToEventRanges(peerEventInstances);
var peerEventFootprints = this.eventRangesToEventFootprints(peerEventRanges);

var selectAllowFunc;

if (
        this.isFootprintAllowed(
                componentFootprint,
                peerEventFootprints,
                this.opt('selectConstraint'),
                this.opt('selectOverlap')
        )
) {
        selectAllowFunc = this.opt('selectAllow');

        if (selectAllowFunc) {
                return selectAllowFunc(componentFootprint.toLegacy(this)) !== false;
        }
        else {
                return true;
        }
}

return false;

};

Calendar.prototype.isFootprintAllowed = function(

componentFootprint,
peerEventFootprints,
constraintVal,
overlapVal,
subjectEventInstance // optional

) {

var constraintFootprints; // ComponentFootprint[]
var overlapEventFootprints; // EventFootprint[]

if (constraintVal != null) {
        constraintFootprints = this.constraintValToFootprints(constraintVal, componentFootprint.isAllDay);

        if (!this.isFootprintWithinConstraints(componentFootprint, constraintFootprints)) {
                return false;
        }
}

overlapEventFootprints = this.collectOverlapEventFootprints(peerEventFootprints, componentFootprint);

if (overlapVal === false) {
        if (overlapEventFootprints.length) {
                return false;
        }
}
else if (typeof overlapVal === 'function') {
        if (!isOverlapsAllowedByFunc(overlapEventFootprints, overlapVal, subjectEventInstance)) {
                return false;
        }
}

if (subjectEventInstance) {
        if (!isOverlapEventInstancesAllowed(overlapEventFootprints, subjectEventInstance)) {
                return false;
        }
}

return true;

};

// Constraint // ————————————————————————————————

Calendar.prototype.isFootprintWithinConstraints = function(componentFootprint, constraintFootprints) {

var i;

for (i = 0; i < constraintFootprints.length; i++) {
        if (this.footprintContainsFootprint(constraintFootprints[i], componentFootprint)) {
                return true;
        }
}

return false;

};

Calendar.prototype.constraintValToFootprints = function(constraintVal, isAllDay) {

var eventInstances;

if (constraintVal === 'businessHours') {
        return this.buildCurrentBusinessFootprints(isAllDay);
}
else if (typeof constraintVal === 'object') {
        eventInstances = this.parseEventDefToInstances(constraintVal); // handles recurring events

        if (!eventInstances) { // invalid input. fallback to parsing footprint directly
                return this.parseFootprints(constraintVal);
        }
        else {
                return this.eventInstancesToFootprints(eventInstances);
        }
}
else if (constraintVal != null) { // an ID
        eventInstances = this.eventManager.getEventInstancesWithId(constraintVal);

        return this.eventInstancesToFootprints(eventInstances);
}

};

// conversion util Calendar.prototype.eventInstancesToFootprints = function(eventInstances) {

return eventFootprintsToComponentFootprints(
        this.eventRangesToEventFootprints(
                eventInstancesToEventRanges(eventInstances)
        )
);

};

// Overlap // ————————————————————————————————

Calendar.prototype.collectOverlapEventFootprints = function(peerEventFootprints, targetFootprint) {

var overlapEventFootprints = [];
var i;

for (i = 0; i < peerEventFootprints.length; i++) {
        if (
                this.footprintsIntersect(
                        targetFootprint,
                        peerEventFootprints[i].componentFootprint
                )
        ) {
                overlapEventFootprints.push(peerEventFootprints[i]);
        }
}

return overlapEventFootprints;

};

// optional subjectEventInstance function isOverlapsAllowedByFunc(overlapEventFootprints, overlapFunc, subjectEventInstance) {

var i;

for (i = 0; i < overlapEventFootprints.length; i++) {
        if (
                !overlapFunc(
                        overlapEventFootprints[i].eventInstance.toLegacy(),
                        subjectEventInstance ? subjectEventInstance.toLegacy() : null
                )
        ) {
                return false;
        }
}

return true;

}

function isOverlapEventInstancesAllowed(overlapEventFootprints, subjectEventInstance) {

var subjectLegacyInstance = subjectEventInstance.toLegacy();
var i;
var overlapEventInstance;
var overlapEventDef;
var overlapVal;

for (i = 0; i < overlapEventFootprints.length; i++) {
        overlapEventInstance = overlapEventFootprints[i].eventInstance;
        overlapEventDef = overlapEventInstance.def;

        // don't need to pass in calendar, because don't want to consider global eventOverlap property,
        // because we already considered that earlier in the process.
        overlapVal = overlapEventDef.getOverlap();

        if (overlapVal === false) {
                return false;
        }
        else if (typeof overlapVal === 'function') {
                if (
                        !overlapVal(
                                overlapEventInstance.toLegacy(),
                                subjectLegacyInstance
                        )
                ) {
                        return false;
                }
        }
}

return true;

}

// Conversion: eventDefs -> eventInstances -> eventRanges -> eventFootprints -> componentFootprints // ———————————————————————————————— // NOTE: this might seem like repetitive code with the Grid class, however, this code is related to // constraints whereas the Grid code is related to rendering. Each approach might want to convert // eventRanges -> eventFootprints in a different way. Regardless, there are opportunities to make // this more DRY.

/* Returns false on invalid input. */ Calendar.prototype.parseEventDefToInstances = function(eventInput) {

var eventPeriod = this.eventManager.currentPeriod;
var eventDef = EventDefParser.parse(eventInput, new EventSource(this));

if (!eventDef) { // invalid
        return false;
}

if (eventPeriod) {
        return eventDef.buildInstances(eventPeriod.unzonedRange);
}
else {
        return [];
}

};

Calendar.prototype.eventRangesToEventFootprints = function(eventRanges) {

var i;
var eventFootprints = [];

for (i = 0; i < eventRanges.length; i++) {
        eventFootprints.push.apply(eventFootprints, // append
                this.eventRangeToEventFootprints(eventRanges[i])
        );
}

return eventFootprints;

};

/* TODO: somehow more DRY with Grid::eventRangeToEventFootprints */ Calendar.prototype.eventRangeToEventFootprints = function(eventRange) {

return [
        new EventFootprint(
                new ComponentFootprint(
                        eventRange.unzonedRange,
                        eventRange.eventDef.isAllDay()
                ),
                eventRange.eventDef,
                eventRange.eventInstance // might not exist
        )
];

};

/* Parses footprints directly. Very similar to EventDateProfile::parse :( */ Calendar.prototype.parseFootprints = function(rawInput) {

var start, end;

if (rawInput.start) {
        start = this.moment(rawInput.start);

        if (!start.isValid()) {
                start = null;
        }
}

if (rawInput.end) {
        end = this.moment(rawInput.end);

        if (!end.isValid()) {
                end = null;
        }
}

return [
        new ComponentFootprint(
                new UnzonedRange(start, end),
                (start && !start.hasTime()) || (end && !end.hasTime()) // isAllDay
        )
];

};

// Footprint Utils // —————————————————————————————-

Calendar.prototype.footprintContainsFootprint = function(outerFootprint, innerFootprint) {

return outerFootprint.unzonedRange.containsRange(innerFootprint.unzonedRange);

};

Calendar.prototype.footprintsIntersect = function(footprint0, footprint1) {

return footprint0.unzonedRange.intersectsWith(footprint1.unzonedRange);

};

;;

Calendar.mixin({

// Sources
// ------------------------------------------------------------------------------------

getEventSources: function() {
        return this.eventManager.otherSources.slice(); // clone
},

getEventSourceById: function(id) {
        return this.eventManager.getSourceById(
                EventSource.normalizeId(id)
        );
},

addEventSource: function(sourceInput) {
        var source = EventSourceParser.parse(sourceInput, this);

        if (source) {
                this.eventManager.addSource(source);
        }
},

removeEventSources: function(sourceMultiQuery) {
        var eventManager = this.eventManager;
        var sources;
        var i;

        if (sourceMultiQuery == null) {
                this.eventManager.removeAllSources();
        }
        else {
                sources = eventManager.multiQuerySources(sourceMultiQuery);

                eventManager.freeze();

                for (i = 0; i < sources.length; i++) {
                        eventManager.removeSource(sources[i]);
                }

                eventManager.thaw();
        }
},

removeEventSource: function(sourceQuery) {
        var eventManager = this.eventManager;
        var sources = eventManager.querySources(sourceQuery);
        var i;

        eventManager.freeze();

        for (i = 0; i < sources.length; i++) {
                eventManager.removeSource(sources[i]);
        }

        eventManager.thaw();
},

refetchEventSources: function(sourceMultiQuery) {
        var eventManager = this.eventManager;
        var sources = eventManager.multiQuerySources(sourceMultiQuery);
        var i;

        eventManager.freeze();

        for (i = 0; i < sources.length; i++) {
                eventManager.refetchSource(sources[i]);
        }

        eventManager.thaw();
},

// Events
// ------------------------------------------------------------------------------------

refetchEvents: function() {
        this.eventManager.refetchAllSources();
},

renderEvents: function(eventInputs, isSticky) {
        this.eventManager.freeze();

        for (var i = 0; i < eventInputs.length; i++) {
                this.renderEvent(eventInputs[i], isSticky);
        }

        this.eventManager.thaw();
},

renderEvent: function(eventInput, isSticky) {
        var eventManager = this.eventManager;
        var eventDef = EventDefParser.parse(
                eventInput,
                eventInput.source || eventManager.stickySource
        );

        if (eventDef) {
                eventManager.addEventDef(eventDef, isSticky);
        }
},

// legacyQuery operates on legacy event instance objects
removeEvents: function(legacyQuery) {
        var eventManager = this.eventManager;
        var eventInstances = eventManager.getEventInstances();
        var legacyInstances;
        var idMap = {};
        var eventDef;
        var i;

        if (legacyQuery == null) { // shortcut for removing all
                eventManager.removeAllEventDefs();
        }
        else {
                legacyInstances = eventInstances.map(function(eventInstance) {
                        return eventInstance.toLegacy();
                });

                legacyInstances = filterLegacyEventInstances(legacyInstances, legacyQuery);

                // compute unique IDs
                for (i = 0; i < legacyInstances.length; i++) {
                        eventDef = this.eventManager.getEventDefByUid(legacyInstances[i]._id);
                        idMap[eventDef.id] = true;
                }

                eventManager.freeze();

                for (i in idMap) { // reuse `i` as an "id"
                        eventManager.removeEventDefsById(i);
                }

                eventManager.thaw();
        }
},

// legacyQuery operates on legacy event instance objects
clientEvents: function(legacyQuery) {
        var eventInstances = this.eventManager.getEventInstances();
        var legacyEventInstances = eventInstances.map(function(eventInstance) {
                return eventInstance.toLegacy();
        });

        return filterLegacyEventInstances(legacyEventInstances, legacyQuery);
},

updateEvents: function(eventPropsArray) {
        this.eventManager.freeze();

        for (var i = 0; i < eventPropsArray.length; i++) {
                this.updateEvent(eventPropsArray[i]);
        }

        this.eventManager.thaw();
},

updateEvent: function(eventProps) {
        var eventDef = this.eventManager.getEventDefByUid(eventProps._id);
        var eventInstance;
        var eventDefMutation;

        if (eventDef instanceof SingleEventDef) {
                eventInstance = eventDef.buildInstance();

                eventDefMutation = EventDefMutation.createFromRawProps(
                        eventInstance,
                        eventProps, // raw props
                        null // largeUnit -- who uses it?
                );

                this.eventManager.mutateEventsWithId(eventDef.id, eventDefMutation); // will release
        }
}

});

function filterLegacyEventInstances(legacyEventInstances, legacyQuery) {

if (legacyQuery == null) {
        return legacyEventInstances;
}
else if ($.isFunction(legacyQuery)) {
        return legacyEventInstances.filter(legacyQuery);
}
else { // an event ID
        legacyQuery += ''; // normalize to string

        return legacyEventInstances.filter(function(legacyEventInstance) {
                // soft comparison because id not be normalized to string
                return legacyEventInstance.id == legacyQuery;
        });
}

}

;;

Calendar.defaults = {

titleRangeSeparator: ' \u2013 ', // en dash
monthYearFormat: 'MMMM YYYY', // required for en. other locales rely on datepicker computable option

defaultTimedEventDuration: '02:00:00',
defaultAllDayEventDuration: { days: 1 },
forceEventDuration: false,
nextDayThreshold: '09:00:00', // 9am

// display
defaultView: 'month',
aspectRatio: 1.35,
header: {
        left: 'title',
        center: '',
        right: 'today prev,next'
},
weekends: true,
weekNumbers: false,

weekNumberTitle: 'W',
weekNumberCalculation: 'local',

//editable: false,

//nowIndicator: false,

scrollTime: '06:00:00',
minTime: '00:00:00',
maxTime: '24:00:00',
showNonCurrentDates: true,

// event ajax
lazyFetching: true,
startParam: 'start',
endParam: 'end',
timezoneParam: 'timezone',

timezone: false,

//allDayDefault: undefined,

// locale
isRTL: false,
buttonText: {
        prev: "prev",
        next: "next",
        prevYear: "prev year",
        nextYear: "next year",
        year: 'year', // TODO: locale files need to specify this
        today: 'today',
        month: 'month',
        week: 'week',
        day: 'day'
},
//buttonIcons: null,

allDayText: 'all-day',

// jquery-ui theming
theme: false,
//themeButtonIcons: null,

//eventResizableFromStart: false,
dragOpacity: .75,
dragRevertDuration: 500,
dragScroll: true,

//selectable: false,
unselectAuto: true,
//selectMinDistance: 0,

dropAccept: '*',

eventOrder: 'title',
//eventRenderWait: null,

eventLimit: false,
eventLimitText: 'more',
eventLimitClick: 'popover',
dayPopoverFormat: 'LL',

handleWindowResize: true,
windowResizeDelay: 100, // milliseconds before an updateSize happens

longPressDelay: 1000

};

Calendar.englishDefaults = { // used by locale.js

dayPopoverFormat: 'dddd, MMMM D'

};

Calendar.rtlDefaults = { // right-to-left defaults

header: { // TODO: smarter solution (first/center/last ?)
        left: 'next,prev today',
        center: '',
        right: 'title'
},
buttonIcons: {
        prev: 'right-single-arrow',
        next: 'left-single-arrow',
        prevYear: 'right-double-arrow',
        nextYear: 'left-double-arrow'
},
themeButtonIcons: {
        prev: 'circle-triangle-e',
        next: 'circle-triangle-w',
        nextYear: 'seek-prev',
        prevYear: 'seek-next'
}

};

;;

var localeOptionHash = FC.locales = {}; // initialize and expose

// TODO: document the structure and ordering of a FullCalendar locale file

// Initialize jQuery UI datepicker translations while using some of the translations // Will set this as the default locales for datepicker. FC.datepickerLocale = function(localeCode, dpLocaleCode, dpOptions) {

// get the FullCalendar internal option hash for this locale. create if necessary
var fcOptions = localeOptionHash[localeCode] || (localeOptionHash[localeCode] = {});

// transfer some simple options from datepicker to fc
fcOptions.isRTL = dpOptions.isRTL;
fcOptions.weekNumberTitle = dpOptions.weekHeader;

// compute some more complex options from datepicker
$.each(dpComputableOptions, function(name, func) {
        fcOptions[name] = func(dpOptions);
});

// is jQuery UI Datepicker is on the page?
if ($.datepicker) {

        // Register the locale data.
        // FullCalendar and MomentJS use locale codes like "pt-br" but Datepicker
        // does it like "pt-BR" or if it doesn't have the locale, maybe just "pt".
        // Make an alias so the locale can be referenced either way.
        $.datepicker.regional[dpLocaleCode] =
                $.datepicker.regional[localeCode] = // alias
                        dpOptions;

        // Alias 'en' to the default locale data. Do this every time.
        $.datepicker.regional.en = $.datepicker.regional[''];

        // Set as Datepicker's global defaults.
        $.datepicker.setDefaults(dpOptions);
}

};

// Sets FullCalendar-specific translations. Will set the locales as the global default. FC.locale = function(localeCode, newFcOptions) {

var fcOptions;
var momOptions;

// get the FullCalendar internal option hash for this locale. create if necessary
fcOptions = localeOptionHash[localeCode] || (localeOptionHash[localeCode] = {});

// provided new options for this locales? merge them in
if (newFcOptions) {
        fcOptions = localeOptionHash[localeCode] = mergeOptions([ fcOptions, newFcOptions ]);
}

// compute locale options that weren't defined.
// always do this. newFcOptions can be undefined when initializing from i18n file,
// so no way to tell if this is an initialization or a default-setting.
momOptions = getMomentLocaleData(localeCode); // will fall back to en
$.each(momComputableOptions, function(name, func) {
        if (fcOptions[name] == null) {
                fcOptions[name] = func(momOptions, fcOptions);
        }
});

// set it as the default locale for FullCalendar
Calendar.defaults.locale = localeCode;

};

// NOTE: can't guarantee any of these computations will run because not every locale has datepicker // configs, so make sure there are English fallbacks for these in the defaults file. var dpComputableOptions = {

buttonText: function(dpOptions) {
        return {
                // the translations sometimes wrongly contain HTML entities
                prev: stripHtmlEntities(dpOptions.prevText),
                next: stripHtmlEntities(dpOptions.nextText),
                today: stripHtmlEntities(dpOptions.currentText)
        };
},

// Produces format strings like "MMMM YYYY" -> "September 2014"
monthYearFormat: function(dpOptions) {
        return dpOptions.showMonthAfterYear ?
                'YYYY[' + dpOptions.yearSuffix + '] MMMM' :
                'MMMM YYYY[' + dpOptions.yearSuffix + ']';
}

};

var momComputableOptions = {

// Produces format strings like "ddd M/D" -> "Fri 9/15"
dayOfMonthFormat: function(momOptions, fcOptions) {
        var format = momOptions.longDateFormat('l'); // for the format like "M/D/YYYY"

        // strip the year off the edge, as well as other misc non-whitespace chars
        format = format.replace(/^Y+[^\w\s]*|[^\w\s]*Y+$/g, '');

        if (fcOptions.isRTL) {
                format += ' ddd'; // for RTL, add day-of-week to end
        }
        else {
                format = 'ddd ' + format; // for LTR, add day-of-week to beginning
        }
        return format;
},

// Produces format strings like "h:mma" -> "6:00pm"
mediumTimeFormat: function(momOptions) { // can't be called `timeFormat` because collides with option
        return momOptions.longDateFormat('LT')
                .replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
},

// Produces format strings like "h(:mm)a" -> "6pm" / "6:30pm"
smallTimeFormat: function(momOptions) {
        return momOptions.longDateFormat('LT')
                .replace(':mm', '(:mm)')
                .replace(/(\Wmm)$/, '($1)') // like above, but for foreign locales
                .replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
},

// Produces format strings like "h(:mm)t" -> "6p" / "6:30p"
extraSmallTimeFormat: function(momOptions) {
        return momOptions.longDateFormat('LT')
                .replace(':mm', '(:mm)')
                .replace(/(\Wmm)$/, '($1)') // like above, but for foreign locales
                .replace(/\s*a$/i, 't'); // convert to AM/PM/am/pm to lowercase one-letter. remove any spaces beforehand
},

// Produces format strings like "ha" / "H" -> "6pm" / "18"
hourFormat: function(momOptions) {
        return momOptions.longDateFormat('LT')
                .replace(':mm', '')
                .replace(/(\Wmm)$/, '') // like above, but for foreign locales
                .replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
},

// Produces format strings like "h:mm" -> "6:30" (with no AM/PM)
noMeridiemTimeFormat: function(momOptions) {
        return momOptions.longDateFormat('LT')
                .replace(/\s*a$/i, ''); // remove trailing AM/PM
}

};

// options that should be computed off live calendar options (considers override options) // TODO: best place for this? related to locale? // TODO: flipping text based on isRTL is a bad idea because the CSS `direction` might want to handle it var instanceComputableOptions = {

// Produces format strings for results like "Mo 16"
smallDayDateFormat: function(options) {
        return options.isRTL ?
                'D dd' :
                'dd D';
},

// Produces format strings for results like "Wk 5"
weekFormat: function(options) {
        return options.isRTL ?
                'w[ ' + options.weekNumberTitle + ']' :
                '[' + options.weekNumberTitle + ' ]w';
},

// Produces format strings for results like "Wk5"
smallWeekFormat: function(options) {
        return options.isRTL ?
                'w[' + options.weekNumberTitle + ']' :
                '[' + options.weekNumberTitle + ']w';
}

};

// TODO: make these computable properties in optionsModel function populateInstanceComputableOptions(options) {

$.each(instanceComputableOptions, function(name, func) {
        if (options[name] == null) {
                options[name] = func(options);
        }
});

}

// Returns moment's internal locale data. If doesn't exist, returns English. function getMomentLocaleData(localeCode) {

return moment.localeData(localeCode) || moment.localeData('en');

}

// Initialize English by forcing computation of moment-derived options. // Also, sets it as the default. FC.locale('en', Calendar.englishDefaults);

;;

var UnzonedRange = FC.UnzonedRange = Class.extend({

startMs: null, // if null, no start constraint
endMs: null, // if null, no end constraint

// TODO: move these into footprint.
// Especially, doesn't make sense for null startMs/endMs.
isStart: true,
isEnd: true,

constructor: function(startInput, endInput) {

        if (moment.isMoment(startInput)) {
                startInput = startInput.clone().stripZone();
        }

        if (moment.isMoment(endInput)) {
                endInput = endInput.clone().stripZone();
        }

        if (startInput) {
                this.startMs = startInput.valueOf();
        }

        if (endInput) {
                this.endMs = endInput.valueOf();
        }
},

intersect: function(otherRange) {
        var startMs = this.startMs;
        var endMs = this.endMs;
        var newRange = null;

        if (otherRange.startMs !== null) {
                if (startMs === null) {
                        startMs = otherRange.startMs;
                }
                else {
                        startMs = Math.max(startMs, otherRange.startMs);
                }
        }

        if (otherRange.endMs !== null) {
                if (endMs === null) {
                        endMs = otherRange.endMs;
                }
                else {
                        endMs = Math.min(endMs, otherRange.endMs);
                }
        }

        if (startMs === null || endMs === null || startMs < endMs) {
                newRange = new UnzonedRange(startMs, endMs);
                newRange.isStart = this.isStart && startMs === this.startMs;
                newRange.isEnd = this.isEnd && endMs === this.endMs;
        }

        return newRange;
},

intersectsWith: function(otherRange) {
        return (this.endMs === null || otherRange.startMs === null || this.endMs > otherRange.startMs) &&
                (this.startMs === null || otherRange.endMs === null || this.startMs < otherRange.endMs);
},

containsRange: function(innerRange) {
        return (this.startMs === null || (innerRange.startMs !== null && innerRange.startMs >= this.startMs)) &&
                (this.endMs === null || (innerRange.endMs !== null && innerRange.endMs <= this.endMs));
},

// `date` can be a moment, a Date, or a millisecond time.
containsDate: function(date) {
        var ms = date.valueOf();

        return (this.startMs === null || ms >= this.startMs) &&
                (this.endMs === null || ms < this.endMs);
},

// If the given date is not within the given range, move it inside.
// (If it's past the end, make it one millisecond before the end).
// `date` can be a moment, a Date, or a millisecond time.
// Returns a MS-time.
constrainDate: function(date) {
        var ms = date.valueOf();

        if (this.startMs !== null && ms < this.startMs) {
                ms = this.startMs;
        }

        if (this.endMs !== null && ms >= this.endMs) {
                ms = this.endMs - 1;
        }

        return ms;
},

equals: function(otherRange) {
        return this.startMs === otherRange.startMs && this.endMs === otherRange.endMs;
},

clone: function() {
        var range = new UnzonedRange(this.startMs, this.endMs);

        range.isStart = this.isStart;
        range.isEnd = this.isEnd;

        return range;
},

// Returns an ambig-zoned moment from startMs.
// BEWARE: returned moment is not localized.
// Formatting and start-of-week will be default.
getStart: function() {
        if (this.startMs !== null) {
                return FC.moment.utc(this.startMs).stripZone();
        }
},

// Returns an ambig-zoned moment from startMs.
// BEWARE: returned moment is not localized.
// Formatting and start-of-week will be default.
getEnd: function() {
        if (this.endMs !== null) {
                return FC.moment.utc(this.endMs).stripZone();
        }
}

});

/* SIDEEFFECT: will mutate eventRanges. Will return a new array result. Only works for non-open-ended ranges. */ function invertUnzonedRanges(ranges, constraintRange) {

var invertedRanges = [];
var startMs = constraintRange.startMs; // the end of the previous range. the start of the new range
var i;
var dateRange;

// ranges need to be in order. required for our date-walking algorithm
ranges.sort(compareUnzonedRanges);

for (i = 0; i < ranges.length; i++) {
        dateRange = ranges[i];

        // add the span of time before the event (if there is any)
        if (dateRange.startMs > startMs) { // compare millisecond time (skip any ambig logic)
                invertedRanges.push(
                        new UnzonedRange(startMs, dateRange.startMs)
                );
        }

        if (dateRange.endMs > startMs) {
                startMs = dateRange.endMs;
        }
}

// add the span of time after the last event (if there is any)
if (startMs < constraintRange.endMs) { // compare millisecond time (skip any ambig logic)
        invertedRanges.push(
                new UnzonedRange(startMs, constraintRange.endMs)
        );
}

return invertedRanges;

}

/* Only works for non-open-ended ranges. */ function compareUnzonedRanges(range1, range2) {

return range1.startMs - range2.startMs; // earlier ranges go first

}

;;

/* Meant to be immutable */ var ComponentFootprint = FC.ComponentFootprint = Class.extend({

unzonedRange: null,
isAllDay: false, // component can choose to ignore this

constructor: function(unzonedRange, isAllDay) {
        this.unzonedRange = unzonedRange;
        this.isAllDay = isAllDay;
},

/*
Only works for non-open-ended ranges.
*/
toLegacy: function(calendar) {
        return {
                start: calendar.msToMoment(this.unzonedRange.startMs, this.isAllDay),
                end: calendar.msToMoment(this.unzonedRange.endMs, this.isAllDay)
        };
}

});

;;

var EventManager = Class.extend(EmitterMixin, ListenerMixin, {

currentPeriod: null,

calendar: null,
stickySource: null,
otherSources: null, // does not include sticky source

constructor: function(calendar) {
        this.calendar = calendar;
        this.stickySource = new ArrayEventSource(calendar);
        this.otherSources = [];
},

requestEvents: function(start, end, timezone, force) {
        if (
                force ||
                !this.currentPeriod ||
                !this.currentPeriod.isWithinRange(start, end) ||
                timezone !== this.currentPeriod.timezone
        ) {
                this.setPeriod( // will change this.currentPeriod
                        new EventPeriod(start, end, timezone)
                );
        }

        return this.currentPeriod.whenReleased();
},

// Source Adding/Removing
// -----------------------------------------------------------------------------------------------------------------

addSource: function(eventSource) {
        this.otherSources.push(eventSource);

        if (this.currentPeriod) {
                this.currentPeriod.requestSource(eventSource); // might release
        }
},

removeSource: function(doomedSource) {
        removeExact(this.otherSources, doomedSource);

        if (this.currentPeriod) {
                this.currentPeriod.purgeSource(doomedSource); // might release
        }
},

removeAllSources: function() {
        this.otherSources = [];

        if (this.currentPeriod) {
                this.currentPeriod.purgeAllSources(); // might release
        }
},

// Source Refetching
// -----------------------------------------------------------------------------------------------------------------

refetchSource: function(eventSource) {
        var currentPeriod = this.currentPeriod;

        if (currentPeriod) {
                currentPeriod.freeze();
                currentPeriod.purgeSource(eventSource);
                currentPeriod.requestSource(eventSource);
                currentPeriod.thaw();
        }
},

refetchAllSources: function() {
        var currentPeriod = this.currentPeriod;

        if (currentPeriod) {
                currentPeriod.freeze();
                currentPeriod.purgeAllSources();
                currentPeriod.requestSources(this.getSources());
                currentPeriod.thaw();
        }
},

// Source Querying
// -----------------------------------------------------------------------------------------------------------------

getSources: function() {
        return [ this.stickySource ].concat(this.otherSources);
},

// like querySources, but accepts multple match criteria (like multiple IDs)
multiQuerySources: function(matchInputs) {

        // coerce into an array
        if (!matchInputs) {
                matchInputs = [];
        }
        else if (!$.isArray(matchInputs)) {
                matchInputs = [ matchInputs ];
        }

        var matchingSources = [];
        var i;

        // resolve raw inputs to real event source objects
        for (i = 0; i < matchInputs.length; i++) {
                matchingSources.push.apply( // append
                        matchingSources,
                        this.querySources(matchInputs[i])
                );
        }

        return matchingSources;
},

// matchInput can either by a real event source object, an ID, or the function/URL for the source.
// returns an array of matching source objects.
querySources: function(matchInput) {
        var sources = this.otherSources;
        var i, source;

        // given a proper event source object
        for (i = 0; i < sources.length; i++) {
                source = sources[i];

                if (source === matchInput) {
                        return [ source ];
                }
        }

        // an ID match
        source = this.getSourceById(EventSource.normalizeId(matchInput));
        if (source) {
                return [ source ];
        }

        // parse as an event source
        matchInput = EventSourceParser.parse(matchInput, this.calendar);
        if (matchInput) {

                return $.grep(sources, function(source) {
                        return isSourcesEquivalent(matchInput, source);
                });
        }
},

/*
ID assumed to already be normalized
*/
getSourceById: function(id) {
        return $.grep(this.otherSources, function(source) {
                return source.id && source.id === id;
        })[0];
},

// Event-Period
// -----------------------------------------------------------------------------------------------------------------

setPeriod: function(eventPeriod) {
        if (this.currentPeriod) {
                this.unbindPeriod(this.currentPeriod);
                this.currentPeriod = null;
        }

        this.currentPeriod = eventPeriod;
        this.bindPeriod(eventPeriod);

        eventPeriod.requestSources(this.getSources());
},

bindPeriod: function(eventPeriod) {
        this.listenTo(eventPeriod, 'release', function(eventsPayload) {
                this.trigger('release', eventsPayload);
        });
},

unbindPeriod: function(eventPeriod) {
        this.stopListeningTo(eventPeriod);
},

// Event Getting/Adding/Removing
// -----------------------------------------------------------------------------------------------------------------

getEventDefByUid: function(uid) {
        if (this.currentPeriod) {
                return this.currentPeriod.getEventDefByUid(uid);
        }
},

addEventDef: function(eventDef, isSticky) {
        if (isSticky) {
                this.stickySource.addEventDef(eventDef);
        }

        if (this.currentPeriod) {
                this.currentPeriod.addEventDef(eventDef); // might release
        }
},

removeEventDefsById: function(eventId) {
        this.getSources().forEach(function(eventSource) {
                eventSource.removeEventDefsById(eventId);
        });

        if (this.currentPeriod) {
                this.currentPeriod.removeEventDefsById(eventId); // might release
        }
},

removeAllEventDefs: function() {
        this.getSources().forEach(function(eventSource) {
                eventSource.removeAllEventDefs();
        });

        if (this.currentPeriod) {
                this.currentPeriod.removeAllEventDefs();
        }
},

// Event Mutating
// -----------------------------------------------------------------------------------------------------------------

/*
Returns an undo function.
*/
mutateEventsWithId: function(eventDefId, eventDefMutation) {
        var currentPeriod = this.currentPeriod;
        var eventDefs;
        var undoFuncs = [];

        if (currentPeriod) {

                currentPeriod.freeze();

                eventDefs = currentPeriod.getEventDefsById(eventDefId);
                eventDefs.forEach(function(eventDef) {
                        // add/remove esp because id might change
                        currentPeriod.removeEventDef(eventDef);
                        undoFuncs.push(eventDefMutation.mutateSingle(eventDef));
                        currentPeriod.addEventDef(eventDef);
                });

                currentPeriod.thaw();

                return function() {
                        currentPeriod.freeze();

                        for (var i = 0; i < eventDefs.length; i++) {
                                currentPeriod.removeEventDef(eventDefs[i]);
                                undoFuncs[i]();
                                currentPeriod.addEventDef(eventDefs[i]);
                        }

                        currentPeriod.thaw();
                };
        }

        return function() { };
},

/*
copies and then mutates
*/
buildMutatedEventInstanceGroup: function(eventDefId, eventDefMutation) {
        var eventDefs = this.getEventDefsById(eventDefId);
        var i;
        var defCopy;
        var allInstances = [];

        for (i = 0; i < eventDefs.length; i++) {
                defCopy = eventDefs[i].clone();

                if (defCopy instanceof SingleEventDef) {
                        eventDefMutation.mutateSingle(defCopy);

                        allInstances.push.apply(allInstances, // append
                                defCopy.buildInstances()
                        );
                }
        }

        return new EventInstanceGroup(allInstances);
},

// Freezing
// -----------------------------------------------------------------------------------------------------------------

freeze: function() {
        if (this.currentPeriod) {
                this.currentPeriod.freeze();
        }
},

thaw: function() {
        if (this.currentPeriod) {
                this.currentPeriod.thaw();
        }
}

});

// Methods that straight-up query the current EventPeriod for an array of results. [

'getEventDefsById',
'getEventInstances',
'getEventInstancesWithId',
'getEventInstancesWithoutId'

].forEach(function(methodName) {

EventManager.prototype[methodName] = function() {
        var currentPeriod = this.currentPeriod;

        if (currentPeriod) {
                return currentPeriod[methodName].apply(currentPeriod, arguments);
        }

        return [];
};

});

function isSourcesEquivalent(source0, source1) {

return source0.getPrimitive() == source1.getPrimitive();

}

;;

var EventPeriod = Class.extend(EmitterMixin, {

start: null,
end: null,
timezone: null,

unzonedRange: null,

requestsByUid: null,
pendingCnt: 0,

freezeDepth: 0,
stuntedReleaseCnt: 0,
releaseCnt: 0,

eventDefsByUid: null,
eventDefsById: null,
eventInstanceGroupsById: null,

constructor: function(start, end, timezone) {
        this.start = start;
        this.end = end;
        this.timezone = timezone;

        this.unzonedRange = new UnzonedRange(
                start.clone().stripZone(),
                end.clone().stripZone()
        );

        this.requestsByUid = {};
        this.eventDefsByUid = {};
        this.eventDefsById = {};
        this.eventInstanceGroupsById = {};
},

isWithinRange: function(start, end) {
        // TODO: use a range util function?
        return !start.isBefore(this.start) && !end.isAfter(this.end);
},

// Requesting and Purging
// -----------------------------------------------------------------------------------------------------------------

requestSources: function(sources) {
        this.freeze();

        for (var i = 0; i < sources.length; i++) {
                this.requestSource(sources[i]);
        }

        this.thaw();
},

requestSource: function(source) {
        var _this = this;
        var request = { source: source, status: 'pending' };

        this.requestsByUid[source.uid] = request;
        this.pendingCnt += 1;

        source.fetch(this.start, this.end, this.timezone).then(function(eventDefs) {
                if (request.status !== 'cancelled') {
                        request.status = 'completed';
                        request.eventDefs = eventDefs;

                        _this.addEventDefs(eventDefs);
                        _this.pendingCnt--;
                        _this.tryRelease();
                }
        }, function() { // failure
                if (request.status !== 'cancelled') {
                        request.status = 'failed';

                        _this.pendingCnt--;
                        _this.tryRelease();
                }
        });
},

purgeSource: function(source) {
        var request = this.requestsByUid[source.uid];

        if (request) {
                delete this.requestsByUid[source.uid];

                if (request.status === 'pending') {
                        request.status = 'cancelled';
                        this.pendingCnt--;
                        this.tryRelease();
                }
                else if (request.status === 'completed') {
                        request.eventDefs.forEach(this.removeEventDef.bind(this));
                }
        }
},

purgeAllSources: function() {
        var requestsByUid = this.requestsByUid;
        var uid, request;
        var completedCnt = 0;

        for (uid in requestsByUid) {
                request = requestsByUid[uid];

                if (request.status === 'pending') {
                        request.status = 'cancelled';
                }
                else if (request.status === 'completed') {
                        completedCnt++;
                }
        }

        this.requestsByUid = {};
        this.pendingCnt = 0;

        if (completedCnt) {
                this.removeAllEventDefs(); // might release
        }
},

// Event Definitions
// -----------------------------------------------------------------------------------------------------------------

getEventDefByUid: function(eventDefUid) {
        return this.eventDefsByUid[eventDefUid];
},

getEventDefsById: function(eventDefId) {
        var a = this.eventDefsById[eventDefId];

        if (a) {
                return a.slice(); // clone
        }

        return [];
},

addEventDefs: function(eventDefs) {
        for (var i = 0; i < eventDefs.length; i++) {
                this.addEventDef(eventDefs[i]);
        }
},

addEventDef: function(eventDef) {
        var eventDefsById = this.eventDefsById;
        var eventDefId = eventDef.id;
        var eventDefs = eventDefsById[eventDefId] || (eventDefsById[eventDefId] = []);
        var eventInstances = eventDef.buildInstances(this.unzonedRange);
        var i;

        eventDefs.push(eventDef);

        this.eventDefsByUid[eventDef.uid] = eventDef;

        for (i = 0; i < eventInstances.length; i++) {
                this.addEventInstance(eventInstances[i], eventDefId);
        }
},

removeEventDefsById: function(eventDefId) {
        var _this = this;

        this.getEventDefsById(eventDefId).forEach(function(eventDef) {
                _this.removeEventDef(eventDef);
        });
},

removeAllEventDefs: function() {
        var isEmpty = $.isEmptyObject(this.eventDefsByUid);

        this.eventDefsByUid = {};
        this.eventDefsById = {};
        this.eventInstanceGroupsById = {};

        if (!isEmpty) {
                this.tryRelease();
        }
},

removeEventDef: function(eventDef) {
        var eventDefsById = this.eventDefsById;
        var eventDefs = eventDefsById[eventDef.id];

        delete this.eventDefsByUid[eventDef.uid];

        if (eventDefs) {
                removeExact(eventDefs, eventDef);

                if (!eventDefs.length) {
                        delete eventDefsById[eventDef.id];
                }

                this.removeEventInstancesForDef(eventDef);
        }
},

// Event Instances
// -----------------------------------------------------------------------------------------------------------------

getEventInstances: function() { // TODO: consider iterator
        var eventInstanceGroupsById = this.eventInstanceGroupsById;
        var eventInstances = [];
        var id;

        for (id in eventInstanceGroupsById) {
                eventInstances.push.apply(eventInstances, // append
                        eventInstanceGroupsById[id].eventInstances
                );
        }

        return eventInstances;
},

getEventInstancesWithId: function(eventDefId) {
        var eventInstanceGroup = this.eventInstanceGroupsById[eventDefId];

        if (eventInstanceGroup) {
                return eventInstanceGroup.eventInstances.slice(); // clone
        }

        return [];
},

getEventInstancesWithoutId: function(eventDefId) { // TODO: consider iterator
        var eventInstanceGroupsById = this.eventInstanceGroupsById;
        var matchingInstances = [];
        var id;

        for (id in eventInstanceGroupsById) {
                if (id !== eventDefId) {
                        matchingInstances.push.apply(matchingInstances, // append
                                eventInstanceGroupsById[id].eventInstances
                        );
                }
        }

        return matchingInstances;
},

addEventInstance: function(eventInstance, eventDefId) {
        var eventInstanceGroupsById = this.eventInstanceGroupsById;
        var eventInstanceGroup = eventInstanceGroupsById[eventDefId] ||
                (eventInstanceGroupsById[eventDefId] = new EventInstanceGroup());

        eventInstanceGroup.eventInstances.push(eventInstance);

        this.tryRelease();
},

removeEventInstancesForDef: function(eventDef) {
        var eventInstanceGroupsById = this.eventInstanceGroupsById;
        var eventInstanceGroup = eventInstanceGroupsById[eventDef.id];
        var removeCnt;

        if (eventInstanceGroup) {
                removeCnt = removeMatching(eventInstanceGroup.eventInstances, function(currentEventInstance) {
                        return currentEventInstance.def === eventDef;
                });

                if (!eventInstanceGroup.eventInstances.length) {
                        delete eventInstanceGroupsById[eventDef.id];
                }

                if (removeCnt) {
                        this.tryRelease();
                }
        }
},

// Releasing and Freezing
// -----------------------------------------------------------------------------------------------------------------

tryRelease: function() {
        if (!this.pendingCnt) {
                if (!this.freezeDepth) {
                        this.release();
                }
                else {
                        this.stuntedReleaseCnt++;
                }
        }
},

release: function() {
        this.releaseCnt++;
        this.trigger('release', this.eventInstanceGroupsById);
},

whenReleased: function() {
        var _this = this;

        if (this.releaseCnt) {
                return Promise.resolve(this.eventInstanceGroupsById);
        }
        else {
                return Promise.construct(function(onResolve) {
                        _this.one('release', onResolve);
                });
        }
},

freeze: function() {
        if (!(this.freezeDepth++)) {
                this.stuntedReleaseCnt = 0;
        }
},

thaw: function() {
        if (!(--this.freezeDepth) && this.stuntedReleaseCnt && !this.pendingCnt) {
                this.release();
        }
}

});

;;

var EventDefParser = {

parse: function(eventInput, source) {
        if (
                isTimeString(eventInput.start) || moment.isDuration(eventInput.start) ||
                isTimeString(eventInput.end) || moment.isDuration(eventInput.end)
        ) {
                return RecurringEventDef.parse(eventInput, source);
        }
        else {
                return SingleEventDef.parse(eventInput, source);
        }
}

};

;;

var EventDef = FC.EventDef = Class.extend(ParsableModelMixin, {

source: null, // required

id: null, // normalized supplied ID
rawId: null, // unnormalized supplied ID
uid: null, // internal ID. new ID for every definition

// NOTE: eventOrder sorting relies on these
title: null,
url: null,
rendering: null,
constraint: null,
overlap: null,
editable: null,
startEditable: null,
durationEditable: null,
color: null,
backgroundColor: null,
borderColor: null,
textColor: null,

className: null, // an array. TODO: rename to className*s* (API breakage)
miscProps: null,

constructor: function(source) {
        this.source = source;
        this.className = [];
        this.miscProps = {};
},

isAllDay: function() {
        // subclasses must implement
},

buildInstances: function(unzonedRange) {
        // subclasses must implement
},

clone: function() {
        var copy = new this.constructor(this.source);

        copy.id = this.id;
        copy.rawId = this.rawId;
        copy.uid = this.uid; // not really unique anymore :(

        EventDef.copyVerbatimStandardProps(this, copy);

        copy.className = this.className; // should clone?
        copy.miscProps = $.extend({}, this.miscProps);

        return copy;
},

hasInverseRendering: function() {
        return this.getRendering() === 'inverse-background';
},

hasBgRendering: function() {
        var rendering = this.getRendering();

        return rendering === 'inverse-background' || rendering === 'background';
},

getRendering: function() {
        if (this.rendering != null) {
                return this.rendering;
        }

        return this.source.rendering;
},

getConstraint: function() {
        if (this.constraint != null) {
                return this.constraint;
        }

        if (this.source.constraint != null) {
                return this.source.constraint;
        }

        return this.source.calendar.opt('eventConstraint'); // what about View option?
},

getOverlap: function() {
        if (this.overlap != null) {
                return this.overlap;
        }

        if (this.source.overlap != null) {
                return this.source.overlap;
        }

        return this.source.calendar.opt('eventOverlap'); // what about View option?
},

isStartExplicitlyEditable: function() {
        if (this.startEditable !== null) {
                return this.startEditable;
        }

        return this.source.startEditable;
},

isDurationExplicitlyEditable: function() {
        if (this.durationEditable !== null) {
                return this.durationEditable;
        }

        return this.source.durationEditable;
},

isExplicitlyEditable: function() {
        if (this.editable !== null) {
                return this.editable;
        }

        return this.source.editable;
},

toLegacy: function() {
        var obj = $.extend({}, this.miscProps);

        obj._id = this.uid;
        obj.source = this.source;
        obj.className = this.className; // should clone?
        obj.allDay = this.isAllDay();

        if (this.rawId != null) {
                obj.id = this.rawId;
        }

        EventDef.copyVerbatimStandardProps(this, obj);

        return obj;
},

applyManualRawProps: function(rawProps) {

        if (rawProps.id != null) {
                this.id = EventDef.normalizeId((this.rawId = rawProps.id));
        }
        else {
                this.id = EventDef.generateId();
        }

        if (rawProps._id != null) { // accept this prop, even tho somewhat internal
                this.uid = String(rawProps._id);
        }
        else {
                this.uid = EventDef.generateId();
        }

        // TODO: converge with EventSource
        if ($.isArray(rawProps.className)) {
                this.className = rawProps.className;
        }
        if (typeof rawProps.className === 'string') {
                this.className = rawProps.className.split(/\s+/);
        }

        return true;
},

applyOtherRawProps: function(rawProps) {
        this.miscProps = rawProps;
}

});

// finish initializing the mixin EventDef.allowRawProps = ParsableModelMixin_allowRawProps; EventDef.copyVerbatimStandardProps = ParsableModelMixin_copyVerbatimStandardProps;

// IDs // ——————————————————————————————————————— // TODO: converge with EventSource

EventDef.uuid = 0;

EventDef.normalizeId = function(id) {

return String(id);

};

EventDef.generateId = function() {

return '_fc' + (EventDef.uuid++);

};

// Parsing // ———————————————————————————————————————

EventDef.allowRawProps({

// not automatically assigned (`false`)
_id: false,
id: false,
className: false,
source: false, // will ignored

// automatically assigned (`true`)
title: true,
url: true,
rendering: true,
constraint: true,
overlap: true,
editable: true,
startEditable: true,
durationEditable: true,
color: true,
backgroundColor: true,
borderColor: true,
textColor: true

});

EventDef.parse = function(rawInput, source) {

var def = new this(source);
var calendarTransform = source.calendar.opt('eventDataTransform');
var sourceTransform = source.eventDataTransform;

if (calendarTransform) {
        rawInput = calendarTransform(rawInput);
}
if (sourceTransform) {
        rawInput = sourceTransform(rawInput);
}

if (def.applyRawProps(rawInput)) {
        return def;
}

return false;

};

;;

var SingleEventDef = EventDef.extend({

dateProfile: null,

/*
Will receive start/end params, but will be ignored.
*/
buildInstances: function() {
        return [ this.buildInstance() ];
},

buildInstance: function() {
        return new EventInstance(
                this, // definition
                this.dateProfile
        );
},

isAllDay: function() {
        return this.dateProfile.isAllDay();
},

clone: function() {
        var def = EventDef.prototype.clone.call(this);

        def.dateProfile = this.dateProfile;

        return def;
},

rezone: function() {
        var calendar = this.source.calendar;
        var dateProfile = this.dateProfile;

        this.dateProfile = new EventDateProfile(
                calendar.moment(dateProfile.start),
                dateProfile.end ? calendar.moment(dateProfile.end) : null,
                calendar
        );
},

/*
NOTE: if super-method fails, should still attempt to apply
*/
applyManualRawProps: function(rawProps) {
        var superSuccess = EventDef.prototype.applyManualRawProps.apply(this, arguments);
        var dateProfile = EventDateProfile.parse(rawProps, this.source); // returns null on failure

        if (dateProfile) {
                this.dateProfile = dateProfile;

                // make sure `date` shows up in the legacy event objects as-is
                if (rawProps.date != null) {
                        this.miscProps.date = rawProps.date;
                }

                return superSuccess;
        }
        else {
                return false;
        }
}

});

// Parsing // ———————————————————————————————————————

SingleEventDef.allowRawProps({ // false = manually process

start: false,
date: false, // alias for 'start'
end: false,
allDay: false

});

;;

var RecurringEventDef = EventDef.extend({

startTime: null, // duration
endTime: null, // duration, or null
dowHash: null, // object hash, or null

isAllDay: function() {
        return !this.startTime && !this.endTime;
},

buildInstances: function(unzonedRange) {
        var calendar = this.source.calendar;
        var unzonedDate = unzonedRange.getStart();
        var unzonedEnd = unzonedRange.getEnd();
        var zonedDayStart;
        var instanceStart, instanceEnd;
        var instances = [];

        while (unzonedDate.isBefore(unzonedEnd)) {

                // if everyday, or this particular day-of-week
                if (!this.dowHash || this.dowHash[unzonedDate.day()]) {

                        zonedDayStart = calendar.applyTimezone(unzonedDate);
                        instanceStart = zonedDayStart.clone();
                        instanceEnd = null;

                        if (this.startTime) {
                                instanceStart.time(this.startTime);
                        }
                        else {
                                instanceStart.stripTime();
                        }

                        if (this.endTime) {
                                instanceEnd = zonedDayStart.clone().time(this.endTime);
                        }

                        instances.push(
                                new EventInstance(
                                        this, // definition
                                        new EventDateProfile(instanceStart, instanceEnd, calendar)
                                )
                        );
                }

                unzonedDate.add(1, 'days');
        }

        return instances;
},

setDow: function(dowNumbers) {

        if (!this.dowHash) {
                this.dowHash = {};
        }

        for (var i = 0; i < dowNumbers.length; i++) {
                this.dowHash[dowNumbers[i]] = true;
        }
},

clone: function() {
        var def = EventDef.prototype.clone.call(this);

        if (def.startTime) {
                def.startTime = moment.duration(this.startTime);
        }

        if (def.endTime) {
                def.endTime = moment.duration(this.endTime);
        }

        if (this.dowHash) {
                def.dowHash = $.extend({}, this.dowHash);
        }

        return def;
},

/*
NOTE: if super-method fails, should still attempt to apply
*/
applyRawProps: function(rawProps) {
        var superSuccess = EventDef.prototype.applyRawProps.apply(this, arguments);

        if (rawProps.start) {
                this.startTime = moment.duration(rawProps.start);
        }

        if (rawProps.end) {
                this.endTime = moment.duration(rawProps.end);
        }

        if (rawProps.dow) {
                this.setDow(rawProps.dow);
        }

        return superSuccess;
}

});

// Parsing // ———————————————————————————————————————

RecurringEventDef.allowRawProps({ // false = manually process

start: false,
end: false,
dow: false

});

;;

var EventInstance = Class.extend({

def: null, // EventDef
dateProfile: null, // EventDateProfile

constructor: function(def, dateProfile) {
        this.def = def;
        this.dateProfile = dateProfile;
},

toLegacy: function() {
        var dateProfile = this.dateProfile;
        var obj = this.def.toLegacy();

        obj.start = dateProfile.start.clone();
        obj.end = dateProfile.end ? dateProfile.end.clone() : null;

        return obj;
}

});

;;

/* It's expected that there will be at least one EventInstance, OR that an explicitEventDef is assigned. */ var EventInstanceGroup = Class.extend({

eventInstances: null,
explicitEventDef: null, // optional

constructor: function(eventInstances) {
        this.eventInstances = eventInstances || [];
},

getAllEventRanges: function() {
        return eventInstancesToEventRanges(this.eventInstances);
},

sliceRenderRanges: function(constraintRange) {
        if (this.isInverse()) {
                return this.sliceInverseRenderRanges(constraintRange);
        }
        else {
                return this.sliceNormalRenderRanges(constraintRange);
        }
},

sliceNormalRenderRanges: function(constraintRange) {
        var eventInstances = this.eventInstances;
        var i, eventInstance;
        var slicedRange;
        var slicedEventRanges = [];

        for (i = 0; i < eventInstances.length; i++) {
                eventInstance = eventInstances[i];

                slicedRange = eventInstance.dateProfile.unzonedRange.intersect(constraintRange);

                if (slicedRange) {
                        slicedEventRanges.push(
                                new EventRange(
                                        slicedRange,
                                        eventInstance.def,
                                        eventInstance
                                )
                        );
                }
        }

        return slicedEventRanges;
},

sliceInverseRenderRanges: function(constraintRange) {
        var unzonedRanges = eventInstancesToUnzonedRanges(this.eventInstances);
        var ownerDef = this.getEventDef();

        unzonedRanges = invertUnzonedRanges(unzonedRanges, constraintRange);

        return unzonedRanges.map(function(unzonedRange) {
                return new EventRange(unzonedRange, ownerDef); // don't give an EventDef
        });
},

isInverse: function() {
        return this.getEventDef().hasInverseRendering();
},

getEventDef: function() {
        return this.explicitEventDef || this.eventInstances[0].def;
}

});

;;

/* Meant to be immutable */ var EventDateProfile = Class.extend({

start: null,
end: null,
unzonedRange: null,

constructor: function(start, end, calendar) {
        this.start = start;
        this.end = end || null;
        this.unzonedRange = this.buildUnzonedRange(calendar);
},

isAllDay: function() {
        return !(this.start.hasTime() || (this.end && this.end.hasTime()));
},

/*
Needs a Calendar object
*/
buildUnzonedRange: function(calendar) {
        var startMs = this.start.clone().stripZone().valueOf();
        var endMs = this.getEnd(calendar).stripZone().valueOf();

        return new UnzonedRange(startMs, endMs);
},

/*
Needs a Calendar object
*/
getEnd: function(calendar) {
        return this.end ?
                this.end.clone() :
                // derive the end from the start and allDay. compute allDay if necessary
                calendar.getDefaultEventEnd(
                        this.isAllDay(),
                        this.start
                );
}

});

/* Needs an EventSource object */ EventDateProfile.parse = function(rawProps, source) {

var startInput = rawProps.start || rawProps.date;
var endInput = rawProps.end;

if (!startInput) {
        return false;
}

var calendar = source.calendar;
var start = calendar.moment(startInput);
var end = endInput ? calendar.moment(endInput) : null;
var forcedAllDay = rawProps.allDay;
var forceEventDuration = calendar.opt('forceEventDuration');

if (!start.isValid()) {
        return false;
}

if (end && (!end.isValid() || !end.isAfter(start))) {
        end = null;
}

if (forcedAllDay == null) {
        forcedAllDay = source.allDayDefault;
        if (forcedAllDay == null) {
                forcedAllDay = calendar.opt('allDayDefault');
        }
}

if (forcedAllDay === true) {
        start.stripTime();
        if (end) {
                end.stripTime();
        }
}
else if (forcedAllDay === false) {
        if (!start.hasTime()) {
                start.time(0);
        }
        if (end && !end.hasTime()) {
                end.time(0);
        }
}

if (!end && forceEventDuration) {
        end = calendar.getDefaultEventEnd(!start.hasTime(), start);
}

return new EventDateProfile(start, end, calendar);

};

;;

var EventRange = Class.extend({

unzonedRange: null,
eventDef: null,
eventInstance: null, // optional

constructor: function(unzonedRange, eventDef, eventInstance) {
        this.unzonedRange = unzonedRange;
        this.eventDef = eventDef;

        if (eventInstance) {
                this.eventInstance = eventInstance;
        }
}

});

;;

var EventFootprint = FC.EventFootprint = Class.extend({

componentFootprint: null,
eventDef: null,
eventInstance: null, // optional

constructor: function(componentFootprint, eventDef, eventInstance) {
        this.componentFootprint = componentFootprint;
        this.eventDef = eventDef;

        if (eventInstance) {
                this.eventInstance = eventInstance;
        }
},

getEventLegacy: function() {
        return (this.eventInstance || this.eventDef).toLegacy();
}

});

;;

var EventDefMutation = FC.EventDefMutation = Class.extend({

// won't ever be empty. will be null instead.
// callers should use setDateMutation for setting.
dateMutation: null,

// hack to get updateEvent/createFromRawProps to work.
// not undo-able and not considered in isEmpty.
rawProps: null, // raw (pre-parse-like)

/*
eventDef assumed to be a SingleEventDef.
returns an undo function.
*/
mutateSingle: function(eventDef) {
        var origDateProfile;

        if (this.dateMutation) {
                origDateProfile = eventDef.dateProfile;

                eventDef.dateProfile = this.dateMutation.buildNewDateProfile(
                        origDateProfile,
                        eventDef.source.calendar
                );
        }

        // can't undo
        if (this.rawProps) {
                eventDef.applyRawProps(this.rawProps);
        }

        if (origDateProfile) {
                return function() {
                        eventDef.dateProfile = origDateProfile;
                };
        }
        else {
                return function() { };
        }
},

setDateMutation: function(dateMutation) {
        if (dateMutation && !dateMutation.isEmpty()) {
                this.dateMutation = dateMutation;
        }
        else {
                this.dateMutation = null;
        }
},

isEmpty: function() {
        return !this.dateMutation;
}

});

EventDefMutation.createFromRawProps = function(eventInstance, newRawProps, largeUnit) {

var eventDef = eventInstance.def;
var applicableRawProps = {};
var propName;
var newDateProfile;
var dateMutation;
var defMutation;

for (propName in newRawProps) {
        if (
                // ignore object-type custom properties and any date-related properties,
                // as well as any other internal property
                typeof newRawProps[propName] !== 'object' &&
                propName !== 'start' && propName !== 'end' && propName !== 'allDay' &&
                propName !== 'source' && propName !== '_id'
        ) {
                applicableRawProps[propName] = newRawProps[propName];
        }
}

newDateProfile = EventDateProfile.parse(newRawProps, eventDef.source);

if (newDateProfile) { // no failure?
        dateMutation = EventDefDateMutation.createFromDiff(
                eventInstance.dateProfile,
                newDateProfile,
                largeUnit
        );
}

defMutation = new EventDefMutation();
defMutation.rawProps = applicableRawProps;

if (dateMutation) {
        defMutation.dateMutation = dateMutation;
}

return defMutation;

};

;;

var EventDefDateMutation = Class.extend({

clearEnd: false,
forceTimed: false,
forceAllDay: false,

// Durations. if 0-ms duration, will be null instead.
// Callers should not set this directly.
dateDelta: null,
startDelta: null,
endDelta: null,

/*
returns an undo function.
*/
buildNewDateProfile: function(eventDateProfile, calendar) {
        var start = eventDateProfile.start.clone();
        var end = null;
        var shouldRezone = false;

        if (!this.clearEnd && eventDateProfile.end) {
                end = eventDateProfile.end.clone();
        }

        if (this.forceTimed) {
                shouldRezone = true;

                if (!start.hasTime()) {
                        start.time(0);
                }

                if (end && !end.hasTime()) {
                        end.time(0);
                }
        }
        else if (this.forceAllDay) {

                if (start.hasTime()) {
                        start.stripTime();
                }

                if (end && end.hasTime()) {
                        end.stripTime();
                }
        }

        if (this.dateDelta) {
                shouldRezone = true;

                start.add(this.dateDelta);

                if (end) {
                        end.add(this.dateDelta);
                }
        }

        // do this before adding startDelta to start, so we can work off of start
        if (this.endDelta) {
                shouldRezone = true;

                if (!end) {
                        end = calendar.getDefaultEventEnd(eventDateProfile.isAllDay(), start);
                }

                end.add(this.endDelta);
        }

        if (this.startDelta) {
                shouldRezone = true;

                start.add(this.startDelta);
        }

        if (shouldRezone) {
                start = calendar.applyTimezone(start);

                if (end) {
                        end = calendar.applyTimezone(end);
                }
        }

        // TODO: okay to access calendar option?
        if (!end && calendar.opt('forceEventDuration')) {
                end = calendar.getDefaultEventEnd(eventDateProfile.isAllDay(), start);
        }

        return new EventDateProfile(start, end, calendar);
},

setDateDelta: function(dateDelta) {
        if (dateDelta && dateDelta.valueOf()) {
                this.dateDelta = dateDelta;
        }
        else {
                this.dateDelta = null;
        }
},

setStartDelta: function(startDelta) {
        if (startDelta && startDelta.valueOf()) {
                this.startDelta = startDelta;
        }
        else {
                this.startDelta = null;
        }
},

setEndDelta: function(endDelta) {
        if (endDelta && endDelta.valueOf()) {
                this.endDelta = endDelta;
        }
        else {
                this.endDelta = null;
        }
},

isEmpty: function() {
        return !this.clearEnd && !this.forceTimed && !this.forceAllDay &&
                !this.dateDelta && !this.startDelta && !this.endDelta;
}

});

EventDefDateMutation.createFromDiff = function(dateProfile0, dateProfile1, largeUnit) {

var clearEnd = dateProfile0.end && !dateProfile1.end;
var forceTimed = dateProfile0.isAllDay() && !dateProfile1.isAllDay();
var forceAllDay = !dateProfile0.isAllDay() && dateProfile1.isAllDay();
var dateDelta;
var endDiff;
var endDelta;
var mutation;

// subtracts the dates in the appropriate way, returning a duration
function subtractDates(date1, date0) { // date1 - date0
        if (largeUnit) {
                return diffByUnit(date1, date0, largeUnit); // poorly named
        }
        else if (dateProfile1.isAllDay()) {
                return diffDay(date1, date0); // poorly named
        }
        else {
                return diffDayTime(date1, date0); // poorly named
        }
}

dateDelta = subtractDates(dateProfile1.start, dateProfile0.start);

if (dateProfile1.end) {
        // use unzonedRanges because dateProfile0.end might be null
        endDiff = subtractDates(
                dateProfile1.unzonedRange.getEnd(),
                dateProfile0.unzonedRange.getEnd()
        );
        endDelta = endDiff.subtract(dateDelta);
}

mutation = new EventDefDateMutation();
mutation.clearEnd = clearEnd;
mutation.forceTimed = forceTimed;
mutation.forceAllDay = forceAllDay;
mutation.setDateDelta(dateDelta);
mutation.setEndDelta(endDelta);

return mutation;

};

;;

function eventDefsToEventInstances(eventDefs, unzonedRange) {

var eventInstances = [];
var i;

for (i = 0; i < eventDefs.length; i++) {
        eventInstances.push.apply(eventInstances, // append
                eventDefs[i].buildInstances(unzonedRange)
        );
}

return eventInstances;

}

function eventInstancesToEventRanges(eventInstances) {

return eventInstances.map(function(eventInstance) {
        return new EventRange(
                eventInstance.dateProfile.unzonedRange,
                eventInstance.def,
                eventInstance
        );
});

}

function eventInstancesToUnzonedRanges(eventInstances) {

return eventInstances.map(function(eventInstance) {
        return eventInstance.dateProfile.unzonedRange;
});

}

function eventFootprintsToComponentFootprints(eventFootprints) {

return eventFootprints.map(function(eventFootprint) {
        return eventFootprint.componentFootprint;
});

}

;;

var EventSource = Class.extend(ParsableModelMixin, {

calendar: null,

id: null, // can stay null
uid: null,
color: null,
backgroundColor: null,
borderColor: null,
textColor: null,
className: null, // array
editable: null,
startEditable: null,
durationEditable: null,
rendering: null,
overlap: null,
constraint: null,
allDayDefault: null,
eventDataTransform: null, // optional function

constructor: function(calendar) {
        this.calendar = calendar;
        this.className = [];
        this.uid = String(EventSource.uuid++);
},

fetch: function(start, end, timezone) {
        // subclasses must implement. must return a promise.
},

removeEventDefsById: function(eventDefId) {
        // optional for subclasses to implement
},

removeAllEventDefs: function() {
        // optional for subclasses to implement
},

/*
For compairing/matching
*/
getPrimitive: function(otherSource) {
        // subclasses must implement
},

parseEventDefs: function(rawEventDefs) {
        var i;
        var eventDef;
        var eventDefs = [];

        for (i = 0; i < rawEventDefs.length; i++) {
                eventDef = EventDefParser.parse(
                        rawEventDefs[i],
                        this // source
                );

                if (eventDef) {
                        eventDefs.push(eventDef);
                }
        }

        return eventDefs;
},

applyManualRawProps: function(rawProps) {

        if (rawProps.id != null) {
                this.id = EventSource.normalizeId(rawProps.id);
        }

        // TODO: converge with EventDef
        if ($.isArray(rawProps.className)) {
                this.className = rawProps.className;
        }
        else if (typeof rawProps.className === 'string') {
                this.className = rawProps.className.split(/\s+/);
        }

        return true;
}

});

// finish initializing the mixin EventSource.allowRawProps = ParsableModelMixin_allowRawProps;

// IDs // ——————————————————————————————————————— // TODO: converge with EventDef

EventSource.uuid = 0;

EventSource.normalizeId = function(id) {

if (id) {
        return String(id);
}

return null;

};

// Parsing // ———————————————————————————————————————

EventSource.allowRawProps({

// manually process...
id: false,
className: false,

// automatically transfer...
color: true,
backgroundColor: true,
borderColor: true,
textColor: true,
editable: true,
startEditable: true,
durationEditable: true,
rendering: true,
overlap: true,
constraint: true,
allDayDefault: true,
eventDataTransform: true

});

/* rawInput can be any data type! */ EventSource.parse = function(rawInput, calendar) {

var source = new this(calendar);

if (typeof rawInput === 'object') {
        if (source.applyRawProps(rawInput)) {
                return source;
        }
}

return false;

};

FC.EventSource = EventSource;

;;

var EventSourceParser = {

sourceClasses: [],

registerClass: function(EventSourceClass) {
        this.sourceClasses.unshift(EventSourceClass); // give highest priority
},

parse: function(rawInput, calendar) {
        var sourceClasses = this.sourceClasses;
        var i;
        var eventSource;

        for (i = 0; i < sourceClasses.length; i++) {
                eventSource = sourceClasses[i].parse(rawInput, calendar);

                if (eventSource) {
                        return eventSource;
                }
        }
}

};

FC.EventSourceParser = EventSourceParser;

;;

var ArrayEventSource = EventSource.extend({

rawEventDefs: null, // unparsed
eventDefs: null,
currentTimezone: null,

constructor: function(calendar) {
        EventSource.apply(this, arguments); // super-constructor
        this.eventDefs = []; // for if setRawEventDefs is never called
},

setRawEventDefs: function(rawEventDefs) {
        this.rawEventDefs = rawEventDefs;
        this.eventDefs = this.parseEventDefs(rawEventDefs);
},

fetch: function(start, end, timezone) {
        var eventDefs = this.eventDefs;
        var i;

        if (
                this.currentTimezone !== null &&
                this.currentTimezone !== timezone
        ) {
                for (i = 0; i < eventDefs.length; i++) {
                        if (eventDefs[i] instanceof SingleEventDef) {
                                eventDefs[i].rezone();
                        }
                }
        }

        this.currentTimezone = timezone;

        return Promise.resolve(eventDefs);
},

addEventDef: function(eventDef) {
        this.eventDefs.push(eventDef);
},

/*
eventDefId already normalized to a string
*/
removeEventDefsById: function(eventDefId) {
        return removeMatching(this.eventDefs, function(eventDef) {
                return eventDef.id === eventDefId;
        });
},

removeAllEventDefs: function() {
        this.eventDefs = [];
},

getPrimitive: function() {
        return this.rawEventDefs;
},

applyManualRawProps: function(rawProps) {
        var superSuccess = EventSource.prototype.applyManualRawProps.apply(this, arguments);

        this.setRawEventDefs(rawProps.events);

        return superSuccess;
}

});

ArrayEventSource.allowRawProps({

events: false // don't automatically transfer

});

ArrayEventSource.parse = function(rawInput, calendar) {

var rawProps;

// normalize raw input
if ($.isArray(rawInput.events)) { // extended form
        rawProps = rawInput;
}
else if ($.isArray(rawInput)) { // short form
        rawProps = { events: rawInput };
}

if (rawProps) {
        return EventSource.parse.call(this, rawProps, calendar);
}

return false;

};

EventSourceParser.registerClass(ArrayEventSource);

FC.ArrayEventSource = ArrayEventSource;

;;

var FuncEventSource = EventSource.extend({

func: null,

fetch: function(start, end, timezone) {
        var _this = this;

        this.calendar.pushLoading();

        return Promise.construct(function(onResolve) {
                _this.func.call(
                        this.calendar,
                        start.clone(),
                        end.clone(),
                        timezone,
                        function(rawEventDefs) {
                                _this.calendar.popLoading();

                                onResolve(_this.parseEventDefs(rawEventDefs));
                        }
                );
        });
},

getPrimitive: function() {
        return this.func;
},

applyManualRawProps: function(rawProps) {
        var superSuccess = EventSource.prototype.applyManualRawProps.apply(this, arguments);

        this.func = rawProps.events;

        return superSuccess;
}

});

FuncEventSource.allowRawProps({

events: false // don't automatically transfer

});

FuncEventSource.parse = function(rawInput, calendar) {

var rawProps;

// normalize raw input
if ($.isFunction(rawInput.events)) { // extended form
        rawProps = rawInput;
}
else if ($.isFunction(rawInput)) { // short form
        rawProps = { events: rawInput };
}

if (rawProps) {
        return EventSource.parse.call(this, rawProps, calendar);
}

return false;

};

EventSourceParser.registerClass(FuncEventSource);

FC.FuncEventSource = FuncEventSource;

;;

var JsonFeedEventSource = EventSource.extend({

// these props must all be manually set before calling fetch
startParam: null,
endParam: null,
timezoneParam: null,
ajaxSettings: null,

fetch: function(start, end, timezone) {
        var _this = this;
        var ajaxSettings = this.ajaxSettings;
        var onSuccess = ajaxSettings.success;
        var onError = ajaxSettings.error;
        var requestParams = this.buildRequestParams(start, end, timezone);

        // todo: eventually handle the promise's then,
        // don't intercept success/error
        // tho will be a breaking API change

        this.calendar.pushLoading();

        return Promise.construct(function(onResolve, onReject) {
                $.ajax($.extend(
                        {}, // avoid mutation
                        JsonFeedEventSource.AJAX_DEFAULTS,
                        ajaxSettings, // should have a `url`
                        {
                                data: requestParams,
                                success: function(rawEventDefs) {
                                        var callbackRes;

                                        _this.calendar.popLoading();

                                        if (rawEventDefs) {
                                                callbackRes = applyAll(onSuccess, this, arguments); // redirect `this`

                                                if ($.isArray(callbackRes)) {
                                                        rawEventDefs = callbackRes;
                                                }

                                                onResolve(_this.parseEventDefs(rawEventDefs));
                                        }
                                        else {
                                                onReject();
                                        }
                                },
                                error: function() {
                                        _this.calendar.popLoading();

                                        applyAll(onError, this, arguments); // redirect `this`
                                        onReject();
                                }
                        }
                ));
        });
},

buildRequestParams: function(start, end, timezone) {
        var calendar = this.calendar;
        var ajaxSettings = this.ajaxSettings;
        var startParam, endParam, timezoneParam;
        var customRequestParams;
        var params = {};

        startParam = this.startParam;
        if (startParam == null) {
                startParam = calendar.opt('startParam');
        }

        endParam = this.endParam;
        if (endParam == null) {
                endParam = calendar.opt('endParam');
        }

        timezoneParam = this.timezoneParam;
        if (timezoneParam == null) {
                timezoneParam = calendar.opt('timezoneParam');
        }

        // retrieve any outbound GET/POST $.ajax data from the options
        if ($.isFunction(ajaxSettings.data)) {
                // supplied as a function that returns a key/value object
                customRequestParams = ajaxSettings.data();
        }
        else {
                // probably supplied as a straight key/value object
                customRequestParams = ajaxSettings.data || {};
        }

        $.extend(params, customRequestParams);

        params[startParam] = start.format();
        params[endParam] = end.format();

        if (timezone && timezone !== 'local') {
                params[timezoneParam] = timezone;
        }

        return params;
},

getPrimitive: function() {
        return this.ajaxSettings.url;
},

applyOtherRawProps: function(rawProps) {
        EventSource.prototype.applyOtherRawProps.apply(this, arguments);

        this.ajaxSettings = rawProps;
}

});

JsonFeedEventSource.AJAX_DEFAULTS = {

dataType: 'json',
cache: false

};

JsonFeedEventSource.allowRawProps({

// automatically transfer (true)...
startParam: true,
endParam: true,
timezoneParam: true

});

JsonFeedEventSource.parse = function(rawInput, calendar) {

var rawProps;

// normalize raw input
if (typeof rawInput.url === 'string') { // extended form
        rawProps = rawInput;
}
else if (typeof rawInput === 'string') { // short form
        rawProps = { url: rawInput }; // will end up in ajaxSettings
}

if (rawProps) {
        return EventSource.parse.call(this, rawProps, calendar);
}

return false;

};

EventSourceParser.registerClass(JsonFeedEventSource);

FC.JsonFeedEventSource = JsonFeedEventSource;

;;

var ThemeRegistry = FC.ThemeRegistry = {

themeClassHash: {},

register: function(themeName, themeClass) {
        this.themeClassHash[themeName] = themeClass;
},

getThemeClass: function(themeSetting) {
        if (!themeSetting) {
                return StandardTheme;
        }
        else if (themeSetting === true) {
                return JqueryUiTheme;
        }
        else {
                return this.themeClassHash[themeSetting];
        }
}

};

;;

var Theme = FC.Theme = Class.extend({

classes: {},
iconClasses: {},
baseIconClass: '',
iconOverrideOption: null,
iconOverrideCustomButtonOption: null,
iconOverridePrefix: '',

constructor: function(optionsModel) {
        this.optionsModel = optionsModel;
        this.processIconOverride();
},

processIconOverride: function() {
        if (this.iconOverrideOption) {
                this.setIconOverride(
                        this.optionsModel.get(this.iconOverrideOption)
                );
        }
},

setIconOverride: function(iconOverrideHash) {
        var iconClassesCopy;
        var buttonName;

        if ($.isPlainObject(iconOverrideHash)) {
                iconClassesCopy = $.extend({}, this.iconClasses);

                for (buttonName in iconOverrideHash) {
                        iconClassesCopy[buttonName] = this.applyIconOverridePrefix(
                                iconOverrideHash[buttonName]
                        );
                }

                this.iconClasses = iconClassesCopy;
        }
        else if (iconOverrideHash === false) {
                this.iconClasses = {};
        }
},

applyIconOverridePrefix: function(className) {
        var prefix = this.iconOverridePrefix;

        if (prefix && className.indexOf(prefix) !== 0) { // if not already present
                className = prefix + className;
        }

        return className;
},

getClass: function(key) {
        return this.classes[key] || '';
},

getIconClass: function(buttonName) {
        var className = this.iconClasses[buttonName];

        if (className) {
                return this.baseIconClass + ' ' + className;
        }

        return '';
},

getCustomButtonIconClass: function(customButtonProps) {
        var className;

        if (this.iconOverrideCustomButtonOption) {
                className = customButtonProps[this.iconOverrideCustomButtonOption];

                if (className) {
                        return this.baseIconClass + ' ' + this.applyIconOverridePrefix(className);
                }
        }

        return '';
}

});

;;

var StandardTheme = Theme.extend({

classes: {
        widget: 'fc-unthemed',
        widgetHeader: 'fc-widget-header',
        widgetContent: 'fc-widget-content',

        buttonGroup: 'fc-button-group',
        button: 'fc-button',
        cornerLeft: 'fc-corner-left',
        cornerRight: 'fc-corner-right',
        stateDefault: 'fc-state-default',
        stateActive: 'fc-state-active',
        stateDisabled: 'fc-state-disabled',
        stateHover: 'fc-state-hover',
        stateDown: 'fc-state-down',

        popoverHeader: 'fc-widget-header',
        popoverContent: 'fc-widget-content',

        // day grid
        headerRow: 'fc-widget-header',
        dayRow: 'fc-widget-content',

        // list view
        listView: 'fc-widget-content'
},

baseIconClass: 'fc-icon',
iconClasses: {
        close: 'fc-icon-x',
        prev: 'fc-icon-left-single-arrow',
        next: 'fc-icon-right-single-arrow',
        prevYear: 'fc-icon-left-double-arrow',
        nextYear: 'fc-icon-right-double-arrow'
},

iconOverrideOption: 'buttonIcons',
iconOverrideCustomButtonOption: 'icon',
iconOverridePrefix: 'fc-icon-'

});

ThemeRegistry.register('standard', StandardTheme);

;;

var JqueryUiTheme = Theme.extend({

classes: {
        widget: 'ui-widget',
        widgetHeader: 'ui-widget-header',
        widgetContent: 'ui-widget-content',

        buttonGroup: 'fc-button-group',
        button: 'ui-button',
        cornerLeft: 'ui-corner-left',
        cornerRight: 'ui-corner-right',
        stateDefault: 'ui-state-default',
        stateActive: 'ui-state-active',
        stateDisabled: 'ui-state-disabled',
        stateHover: 'ui-state-hover',
        stateDown: 'ui-state-down',

        today: 'ui-state-highlight',

        popoverHeader: 'ui-widget-header',
        popoverContent: 'ui-widget-content',

        // day grid
        headerRow: 'ui-widget-header',
        dayRow: 'ui-widget-content',

        // list view
        listView: 'ui-widget-content'
},

baseIconClass: 'ui-icon',
iconClasses: {
        close: 'ui-icon-closethick',
        prev: 'ui-icon-circle-triangle-w',
        next: 'ui-icon-circle-triangle-e',
        prevYear: 'ui-icon-seek-prev',
        nextYear: 'ui-icon-seek-next'
},

iconOverrideOption: 'themeButtonIcons',
iconOverrideCustomButtonOption: 'themeIcon',
iconOverridePrefix: 'ui-icon-'

});

ThemeRegistry.register('jquery-ui', JqueryUiTheme);

;;

var BootstrapTheme = Theme.extend({

classes: {
        widget: 'fc-bootstrap3',

        tableGrid: 'table-bordered', // avoid `table` class b/c don't want margins. only border color
        tableList: 'table table-striped', // `table` class creates bottom margin but who cares

        buttonGroup: 'btn-group',
        button: 'btn btn-default',
        stateActive: 'active',
        stateDisabled: 'disabled',

        today: 'alert alert-info', // the plain `info` class requires `.table`, too much to ask

        popover: 'panel panel-default',
        popoverHeader: 'panel-heading',
        popoverContent: 'panel-body',

        // day grid
        headerRow: 'panel-default', // avoid `panel` class b/c don't want margins/radius. only border color
        dayRow: 'panel-default', // "

        // list view
        listView: 'panel panel-default'
},

baseIconClass: 'glyphicon',
iconClasses: {
        close: 'glyphicon-remove',
        prev: 'glyphicon-chevron-left',
        next: 'glyphicon-chevron-right',
        prevYear: 'glyphicon-backward',
        nextYear: 'glyphicon-forward'
},

iconOverrideOption: 'bootstrapGlyphicons',
iconOverrideCustomButtonOption: 'bootstrapGlyphicon',
iconOverridePrefix: 'glyphicon-'

});

ThemeRegistry.register('bootstrap3', BootstrapTheme);

;;

/* An abstract class for the “basic” views, as well as month view. Renders one or more rows of day cells. ———————————————————————————————————————-*/ // It is a manager for a DayGrid subcomponent, which does most of the heavy lifting. // It is responsible for managing width/height.

var BasicView = FC.BasicView = View.extend({

scroller: null,

dayGridClass: DayGrid, // class the dayGrid will be instantiated from (overridable by subclasses)
dayGrid: null, // the main subcomponent that does most of the heavy lifting

dayNumbersVisible: false, // display day numbers on each day cell?
colWeekNumbersVisible: false, // display week numbers along the side?
cellWeekNumbersVisible: false, // display week numbers in day cell?

weekNumberWidth: null, // width of all the week-number cells running down the side

headContainerEl: null, // div that hold's the dayGrid's rendered date header
headRowEl: null, // the fake row element of the day-of-week header

initialize: function() {
        this.dayGrid = this.instantiateDayGrid();
        this.addChild(this.dayGrid);

        this.scroller = new Scroller({
                overflowX: 'hidden',
                overflowY: 'auto'
        });
},

// Generates the DayGrid object this view needs. Draws from this.dayGridClass
instantiateDayGrid: function() {
        // generate a subclass on the fly with BasicView-specific behavior
        // TODO: cache this subclass
        var subclass = this.dayGridClass.extend(basicDayGridMethods);

        return new subclass(this);
},

// Computes the date range that will be rendered.
buildRenderRange: function(currentUnzonedRange, currentRangeUnit) {
        var renderUnzonedRange = View.prototype.buildRenderRange.apply(this, arguments); // an UnzonedRange
        var start = this.calendar.msToUtcMoment(renderUnzonedRange.startMs, this.isRangeAllDay);
        var end = this.calendar.msToUtcMoment(renderUnzonedRange.endMs, this.isRangeAllDay);

        // year and month views should be aligned with weeks. this is already done for week
        if (/^(year|month)$/.test(currentRangeUnit)) {
                start.startOf('week');

                // make end-of-week if not already
                if (end.weekday()) {
                        end.add(1, 'week').startOf('week'); // exclusively move backwards
                }
        }

        return this.trimHiddenDays(new UnzonedRange(start, end));
},

// Renders the view into `this.el`, which should already be assigned
renderDates: function() {

        this.dayGrid.breakOnWeeks = /year|month|week/.test(this.currentRangeUnit); // do before Grid::setRange
        this.dayGrid.setRange(this.renderUnzonedRange);

        this.dayNumbersVisible = this.dayGrid.rowCnt > 1; // TODO: make grid responsible
        if (this.opt('weekNumbers')) {
                if (this.opt('weekNumbersWithinDays')) {
                        this.cellWeekNumbersVisible = true;
                        this.colWeekNumbersVisible = false;
                }
                else {
                        this.cellWeekNumbersVisible = false;
                        this.colWeekNumbersVisible = true;
                };
        }
        this.dayGrid.numbersVisible = this.dayNumbersVisible ||
                this.cellWeekNumbersVisible || this.colWeekNumbersVisible;

        this.el.addClass('fc-basic-view').html(this.renderSkeletonHtml());
        this.renderHead();

        this.scroller.render();
        var dayGridContainerEl = this.scroller.el.addClass('fc-day-grid-container');
        var dayGridEl = $('<div class="fc-day-grid" />').appendTo(dayGridContainerEl);
        this.el.find('.fc-body > tr > td').append(dayGridContainerEl);

        this.dayGrid.setElement(dayGridEl);
        this.dayGrid.renderDates(this.hasRigidRows());
},

// render the day-of-week headers
renderHead: function() {
        this.headContainerEl =
                this.el.find('.fc-head-container')
                        .html(this.dayGrid.renderHeadHtml());
        this.headRowEl = this.headContainerEl.find('.fc-row');
},

// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
// always completely kill the dayGrid's rendering.
unrenderDates: function() {
        this.dayGrid.unrenderDates();
        this.dayGrid.removeElement();
        this.scroller.destroy();
},

// Builds the HTML skeleton for the view.
// The day-grid component will render inside of a container defined by this HTML.
renderSkeletonHtml: function() {
        var theme = this.calendar.theme;

        return '' +
                '<table class="' + theme.getClass('tableGrid') + '">' +
                        '<thead class="fc-head">' +
                                '<tr>' +
                                        '<td class="fc-head-container ' + theme.getClass('widgetHeader') + '"></td>' +
                                '</tr>' +
                        '</thead>' +
                        '<tbody class="fc-body">' +
                                '<tr>' +
                                        '<td class="' + theme.getClass('widgetContent') + '"></td>' +
                                '</tr>' +
                        '</tbody>' +
                '</table>';
},

// Generates an HTML attribute string for setting the width of the week number column, if it is known
weekNumberStyleAttr: function() {
        if (this.weekNumberWidth !== null) {
                return 'style="width:' + this.weekNumberWidth + 'px"';
        }
        return '';
},

// Determines whether each row should have a constant height
hasRigidRows: function() {
        var eventLimit = this.opt('eventLimit');
        return eventLimit && typeof eventLimit !== 'number';
},

/* Dimensions
------------------------------------------------------------------------------------------------------------------*/

// Refreshes the horizontal dimensions of the view
updateWidth: function() {
        if (this.colWeekNumbersVisible) {
                // Make sure all week number cells running down the side have the same width.
                // Record the width for cells created later.
                this.weekNumberWidth = matchCellWidths(
                        this.el.find('.fc-week-number')
                );
        }
},

// Adjusts the vertical dimensions of the view to the specified values
setHeight: function(totalHeight, isAuto) {
        var eventLimit = this.opt('eventLimit');
        var scrollerHeight;
        var scrollbarWidths;

        // reset all heights to be natural
        this.scroller.clear();
        uncompensateScroll(this.headRowEl);

        this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed

        // is the event limit a constant level number?
        if (eventLimit && typeof eventLimit === 'number') {
                this.dayGrid.limitRows(eventLimit); // limit the levels first so the height can redistribute after
        }

        // distribute the height to the rows
        // (totalHeight is a "recommended" value if isAuto)
        scrollerHeight = this.computeScrollerHeight(totalHeight);
        this.setGridHeight(scrollerHeight, isAuto);

        // is the event limit dynamically calculated?
        if (eventLimit && typeof eventLimit !== 'number') {
                this.dayGrid.limitRows(eventLimit); // limit the levels after the grid's row heights have been set
        }

        if (!isAuto) { // should we force dimensions of the scroll container?

                this.scroller.setHeight(scrollerHeight);
                scrollbarWidths = this.scroller.getScrollbarWidths();

                if (scrollbarWidths.left || scrollbarWidths.right) { // using scrollbars?

                        compensateScroll(this.headRowEl, scrollbarWidths);

                        // doing the scrollbar compensation might have created text overflow which created more height. redo
                        scrollerHeight = this.computeScrollerHeight(totalHeight);
                        this.scroller.setHeight(scrollerHeight);
                }

                // guarantees the same scrollbar widths
                this.scroller.lockOverflow(scrollbarWidths);
        }
},

// given a desired total height of the view, returns what the height of the scroller should be
computeScrollerHeight: function(totalHeight) {
        return totalHeight -
                subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
},

// Sets the height of just the DayGrid component in this view
setGridHeight: function(height, isAuto) {
        if (isAuto) {
                undistributeHeight(this.dayGrid.rowEls); // let the rows be their natural height with no expanding
        }
        else {
                distributeHeight(this.dayGrid.rowEls, height, true); // true = compensate for height-hogging rows
        }
},

/* Scroll
------------------------------------------------------------------------------------------------------------------*/

computeInitialDateScroll: function() {
        return { top: 0 };
},

queryDateScroll: function() {
        return { top: this.scroller.getScrollTop() };
},

applyDateScroll: function(scroll) {
        if (scroll.top !== undefined) {
                this.scroller.setScrollTop(scroll.top);
        }
},

/* Events
------------------------------------------------------------------------------------------------------------------*/

// Renders the given events onto the view and populates the segments array
renderEventsPayload: function(eventsPayload) {
        this.dayGrid.renderEventsPayload(eventsPayload);

        // must compensate for events that overflow the row
        // TODO: how will ChronoComponent handle this?
        this.updateHeight();
}

});

// Methods that will customize the rendering behavior of the BasicView's dayGrid var basicDayGridMethods = {

// Generates the HTML that will go before the day-of week header cells
renderHeadIntroHtml: function() {
        var view = this.view;

        if (view.colWeekNumbersVisible) {
                return '' +
                        '<th class="fc-week-number ' + view.calendar.theme.getClass('widgetHeader') + '" ' + view.weekNumberStyleAttr() + '>' +
                                '<span>' + // needed for matchCellWidths
                                        htmlEscape(this.opt('weekNumberTitle')) +
                                '</span>' +
                        '</th>';
        }

        return '';
},

// Generates the HTML that will go before content-skeleton cells that display the day/week numbers
renderNumberIntroHtml: function(row) {
        var view = this.view;
        var weekStart = this.getCellDate(row, 0);

        if (view.colWeekNumbersVisible) {
                return '' +
                        '<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '>' +
                                view.buildGotoAnchorHtml( // aside from link, important for matchCellWidths
                                        { date: weekStart, type: 'week', forceOff: this.colCnt === 1 },
                                        weekStart.format('w') // inner HTML
                                ) +
                        '</td>';
        }

        return '';
},

// Generates the HTML that goes before the day bg cells for each day-row
renderBgIntroHtml: function() {
        var view = this.view;

        if (view.colWeekNumbersVisible) {
                return '<td class="fc-week-number ' + view.calendar.theme.getClass('widgetContent') + '" ' +
                        view.weekNumberStyleAttr() + '></td>';
        }

        return '';
},

// Generates the HTML that goes before every other type of row generated by DayGrid.
// Affects helper-skeleton and highlight-skeleton rows.
renderIntroHtml: function() {
        var view = this.view;

        if (view.colWeekNumbersVisible) {
                return '<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '></td>';
        }

        return '';
}

};

;;

/* A month view with day cells running in rows (one-per-week) and columns ———————————————————————————————————————-*/

var MonthView = FC.MonthView = BasicView.extend({

// Computes the date range that will be rendered.
buildRenderRange: function() {
        var renderUnzonedRange = BasicView.prototype.buildRenderRange.apply(this, arguments);
        var start = this.calendar.msToUtcMoment(renderUnzonedRange.startMs, this.isRangeAllDay);
        var end = this.calendar.msToUtcMoment(renderUnzonedRange.endMs, this.isRangeAllDay);
        var rowCnt;

        // ensure 6 weeks
        if (this.isFixedWeeks()) {
                rowCnt = Math.ceil( // could be partial weeks due to hiddenDays
                        end.diff(start, 'weeks', true) // dontRound=true
                );
                end.add(6 - rowCnt, 'weeks');
        }

        return new UnzonedRange(start, end);
},

// Overrides the default BasicView behavior to have special multi-week auto-height logic
setGridHeight: function(height, isAuto) {

        // if auto, make the height of each row the height that it would be if there were 6 weeks
        if (isAuto) {
                height *= this.rowCnt / 6;
        }

        distributeHeight(this.dayGrid.rowEls, height, !isAuto); // if auto, don't compensate for height-hogging rows
},

isFixedWeeks: function() {
        return this.opt('fixedWeekCount');
},

isDateInOtherMonth: function(date) {
        return date.month() !== moment.utc(this.currentUnzonedRange.startMs).month(); // TODO: optimize
}

});

;;

fcViews.basic = {

'class': BasicView

};

fcViews.basicDay = {

type: 'basic',
duration: { days: 1 }

};

fcViews.basicWeek = {

type: 'basic',
duration: { weeks: 1 }

};

fcViews.month = {

'class': MonthView,
duration: { months: 1 }, // important for prev/next
defaults: {
        fixedWeekCount: true
}

}; ;;

/* An abstract class for all agenda-related views. Displays one more columns with time slots running vertically. ———————————————————————————————————————-*/ // Is a manager for the TimeGrid subcomponent and possibly the DayGrid subcomponent (if allDaySlot is on). // Responsible for managing width/height.

var AgendaView = FC.AgendaView = View.extend({

scroller: null,

timeGridClass: TimeGrid, // class used to instantiate the timeGrid. subclasses can override
timeGrid: null, // the main time-grid subcomponent of this view

dayGridClass: DayGrid, // class used to instantiate the dayGrid. subclasses can override
dayGrid: null, // the "all-day" subcomponent. if all-day is turned off, this will be null

axisWidth: null, // the width of the time axis running down the side

headContainerEl: null, // div that hold's the timeGrid's rendered date header
noScrollRowEls: null, // set of fake row elements that must compensate when scroller has scrollbars

// when the time-grid isn't tall enough to occupy the given height, we render an <hr> underneath
bottomRuleEl: null,

// indicates that minTime/maxTime affects rendering
usesMinMaxTime: true,

initialize: function() {
        this.timeGrid = this.instantiateTimeGrid();
        this.addChild(this.timeGrid);

        if (this.opt('allDaySlot')) { // should we display the "all-day" area?
                this.dayGrid = this.instantiateDayGrid(); // the all-day subcomponent of this view
                this.addChild(this.dayGrid);
        }

        this.scroller = new Scroller({
                overflowX: 'hidden',
                overflowY: 'auto'
        });
},

// Instantiates the TimeGrid object this view needs. Draws from this.timeGridClass
instantiateTimeGrid: function() {
        var subclass = this.timeGridClass.extend(agendaTimeGridMethods);

        return new subclass(this);
},

// Instantiates the DayGrid object this view might need. Draws from this.dayGridClass
instantiateDayGrid: function() {
        var subclass = this.dayGridClass.extend(agendaDayGridMethods);

        return new subclass(this);
},

/* Rendering
------------------------------------------------------------------------------------------------------------------*/

// Renders the view into `this.el`, which has already been assigned
renderDates: function() {

        this.timeGrid.setRange(this.renderUnzonedRange);

        if (this.dayGrid) {
                this.dayGrid.setRange(this.renderUnzonedRange);
        }

        this.el.addClass('fc-agenda-view').html(this.renderSkeletonHtml());
        this.renderHead();

        this.scroller.render();
        var timeGridWrapEl = this.scroller.el.addClass('fc-time-grid-container');
        var timeGridEl = $('<div class="fc-time-grid" />').appendTo(timeGridWrapEl);
        this.el.find('.fc-body > tr > td').append(timeGridWrapEl);

        this.timeGrid.setElement(timeGridEl);
        this.timeGrid.renderDates();

        // the <hr> that sometimes displays under the time-grid
        this.bottomRuleEl = $('<hr class="fc-divider ' + this.calendar.theme.getClass('widgetHeader') + '"/>')
                .appendTo(this.timeGrid.el); // inject it into the time-grid

        if (this.dayGrid) {
                this.dayGrid.setElement(this.el.find('.fc-day-grid'));
                this.dayGrid.renderDates();

                // have the day-grid extend it's coordinate area over the <hr> dividing the two grids
                this.dayGrid.bottomCoordPadding = this.dayGrid.el.next('hr').outerHeight();
        }

        this.noScrollRowEls = this.el.find('.fc-row:not(.fc-scroller *)'); // fake rows not within the scroller
},

// render the day-of-week headers
renderHead: function() {
        this.headContainerEl =
                this.el.find('.fc-head-container')
                        .html(this.timeGrid.renderHeadHtml());
},

// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
// always completely kill each grid's rendering.
// TODO: move this over to ChronoComponent
unrenderDates: function() {
        this.timeGrid.unrenderDates();
        this.timeGrid.removeElement();

        if (this.dayGrid) {
                this.dayGrid.unrenderDates();
                this.dayGrid.removeElement();
        }

        this.scroller.destroy();
},

// Builds the HTML skeleton for the view.
// The day-grid and time-grid components will render inside containers defined by this HTML.
renderSkeletonHtml: function() {
        var theme = this.calendar.theme;

        return '' +
                '<table class="' + theme.getClass('tableGrid') + '">' +
                        '<thead class="fc-head">' +
                                '<tr>' +
                                        '<td class="fc-head-container ' + theme.getClass('widgetHeader') + '"></td>' +
                                '</tr>' +
                        '</thead>' +
                        '<tbody class="fc-body">' +
                                '<tr>' +
                                        '<td class="' + theme.getClass('widgetContent') + '">' +
                                                (this.dayGrid ?
                                                        '<div class="fc-day-grid"/>' +
                                                        '<hr class="fc-divider ' + theme.getClass('widgetHeader') + '"/>' :
                                                        ''
                                                        ) +
                                        '</td>' +
                                '</tr>' +
                        '</tbody>' +
                '</table>';
},

// Generates an HTML attribute string for setting the width of the axis, if it is known
axisStyleAttr: function() {
        if (this.axisWidth !== null) {
                 return 'style="width:' + this.axisWidth + 'px"';
        }
        return '';
},

/* Now Indicator
------------------------------------------------------------------------------------------------------------------*/

getNowIndicatorUnit: function() {
        return this.timeGrid.getNowIndicatorUnit();
},

/* Dimensions
------------------------------------------------------------------------------------------------------------------*/

updateSize: function(isResize) {
        this.timeGrid.updateSize(isResize);

        View.prototype.updateSize.call(this, isResize); // call the super-method
},

// Refreshes the horizontal dimensions of the view
updateWidth: function() {
        // make all axis cells line up, and record the width so newly created axis cells will have it
        this.axisWidth = matchCellWidths(this.el.find('.fc-axis'));
},

// Adjusts the vertical dimensions of the view to the specified values
setHeight: function(totalHeight, isAuto) {
        var eventLimit;
        var scrollerHeight;
        var scrollbarWidths;

        // reset all dimensions back to the original state
        this.bottomRuleEl.hide(); // .show() will be called later if this <hr> is necessary
        this.scroller.clear(); // sets height to 'auto' and clears overflow
        uncompensateScroll(this.noScrollRowEls);

        // limit number of events in the all-day area
        if (this.dayGrid) {
                this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed

                eventLimit = this.opt('eventLimit');
                if (eventLimit && typeof eventLimit !== 'number') {
                        eventLimit = AGENDA_ALL_DAY_EVENT_LIMIT; // make sure "auto" goes to a real number
                }
                if (eventLimit) {
                        this.dayGrid.limitRows(eventLimit);
                }
        }

        if (!isAuto) { // should we force dimensions of the scroll container?

                scrollerHeight = this.computeScrollerHeight(totalHeight);
                this.scroller.setHeight(scrollerHeight);
                scrollbarWidths = this.scroller.getScrollbarWidths();

                if (scrollbarWidths.left || scrollbarWidths.right) { // using scrollbars?

                        // make the all-day and header rows lines up
                        compensateScroll(this.noScrollRowEls, scrollbarWidths);

                        // the scrollbar compensation might have changed text flow, which might affect height, so recalculate
                        // and reapply the desired height to the scroller.
                        scrollerHeight = this.computeScrollerHeight(totalHeight);
                        this.scroller.setHeight(scrollerHeight);
                }

                // guarantees the same scrollbar widths
                this.scroller.lockOverflow(scrollbarWidths);

                // if there's any space below the slats, show the horizontal rule.
                // this won't cause any new overflow, because lockOverflow already called.
                if (this.timeGrid.getTotalSlatHeight() < scrollerHeight) {
                        this.bottomRuleEl.show();
                }
        }
},

// given a desired total height of the view, returns what the height of the scroller should be
computeScrollerHeight: function(totalHeight) {
        return totalHeight -
                subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
},

/* Scroll
------------------------------------------------------------------------------------------------------------------*/

// Computes the initial pre-configured scroll state prior to allowing the user to change it
computeInitialDateScroll: function() {
        var scrollTime = moment.duration(this.opt('scrollTime'));
        var top = this.timeGrid.computeTimeTop(scrollTime);

        // zoom can give weird floating-point values. rather scroll a little bit further
        top = Math.ceil(top);

        if (top) {
                top++; // to overcome top border that slots beyond the first have. looks better
        }

        return { top: top };
},

queryDateScroll: function() {
        return { top: this.scroller.getScrollTop() };
},

applyDateScroll: function(scroll) {
        if (scroll.top !== undefined) {
                this.scroller.setScrollTop(scroll.top);
        }
},

/* Hit Areas
------------------------------------------------------------------------------------------------------------------*/
// forward all hit-related method calls to the grids (dayGrid might not be defined)

getHitFootprint: function(hit) {
        // TODO: hit.component is set as a hack to identify where the hit came from
        return hit.component.getHitFootprint(hit);
},

getHitEl: function(hit) {
        // TODO: hit.component is set as a hack to identify where the hit came from
        return hit.component.getHitEl(hit);
},

/* Events
------------------------------------------------------------------------------------------------------------------*/

// Renders events onto the view and populates the View's segment array
renderEventsPayload: function(eventsPayload) {
        var dayEventsPayload = {};
        var timedEventsPayload = {};
        var daySegs = [];
        var timedSegs;
        var id, eventInstanceGroup;

        // separate the events into all-day and timed
        for (id in eventsPayload) {
                eventInstanceGroup = eventsPayload[id];

                if (eventInstanceGroup.getEventDef().isAllDay()) {
                        dayEventsPayload[id] = eventInstanceGroup;
                }
                else {
                        timedEventsPayload[id] = eventInstanceGroup;
                }
        }

        // render the events in the subcomponents
        timedSegs = this.timeGrid.renderEventsPayload(timedEventsPayload);
        if (this.dayGrid) {
                daySegs = this.dayGrid.renderEventsPayload(dayEventsPayload);
        }

        // the all-day area is flexible and might have a lot of events, so shift the height
        // TODO: how will ChronoComponent handle this?
        this.updateHeight();
},

/* Dragging (for events and external elements)
------------------------------------------------------------------------------------------------------------------*/

// A returned value of `true` signals that a mock "helper" event has been rendered.
renderDrag: function(eventFootprints, seg) {
        if (eventFootprints.length) {
                if (!eventFootprints[0].componentFootprint.isAllDay) {
                        return this.timeGrid.renderDrag(eventFootprints, seg);
                }
                else if (this.dayGrid) {
                        return this.dayGrid.renderDrag(eventFootprints, seg);
                }
        }
},

/* Selection
------------------------------------------------------------------------------------------------------------------*/

// Renders a visual indication of a selection
renderSelectionFootprint: function(componentFootprint) {
        if (!componentFootprint.isAllDay) {
                this.timeGrid.renderSelectionFootprint(componentFootprint);
        }
        else if (this.dayGrid) {
                this.dayGrid.renderSelectionFootprint(componentFootprint);
        }
}

});

// Methods that will customize the rendering behavior of the AgendaView's timeGrid // TODO: move into TimeGrid var agendaTimeGridMethods = {

// Generates the HTML that will go before the day-of week header cells
renderHeadIntroHtml: function() {
        var view = this.view;
        var weekStart = view.calendar.msToUtcMoment(this.unzonedRange.startMs, true);
        var weekText;

        if (this.opt('weekNumbers')) {
                weekText = weekStart.format(this.opt('smallWeekFormat'));

                return '' +
                        '<th class="fc-axis fc-week-number ' + view.calendar.theme.getClass('widgetHeader') + '" ' + view.axisStyleAttr() + '>' +
                                view.buildGotoAnchorHtml( // aside from link, important for matchCellWidths
                                        { date: weekStart, type: 'week', forceOff: this.colCnt > 1 },
                                        htmlEscape(weekText) // inner HTML
                                ) +
                        '</th>';
        }
        else {
                return '<th class="fc-axis ' + view.calendar.theme.getClass('widgetHeader') + '" ' + view.axisStyleAttr() + '></th>';
        }
},

// Generates the HTML that goes before the bg of the TimeGrid slot area. Long vertical column.
renderBgIntroHtml: function() {
        var view = this.view;

        return '<td class="fc-axis ' + view.calendar.theme.getClass('widgetContent') + '" ' + view.axisStyleAttr() + '></td>';
},

// Generates the HTML that goes before all other types of cells.
// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
renderIntroHtml: function() {
        var view = this.view;

        return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
}

};

// Methods that will customize the rendering behavior of the AgendaView's dayGrid var agendaDayGridMethods = {

// Generates the HTML that goes before the all-day cells
renderBgIntroHtml: function() {
        var view = this.view;

        return '' +
                '<td class="fc-axis ' + view.calendar.theme.getClass('widgetContent') + '" ' + view.axisStyleAttr() + '>' +
                        '<span>' + // needed for matchCellWidths
                                view.getAllDayHtml() +
                        '</span>' +
                '</td>';
},

// Generates the HTML that goes before all other types of cells.
// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
renderIntroHtml: function() {
        var view = this.view;

        return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
}

};

;;

var AGENDA_ALL_DAY_EVENT_LIMIT = 5;

// potential nice values for the slot-duration and interval-duration // from largest to smallest var AGENDA_STOCK_SUB_DURATIONS = [

{ hours: 1 },
{ minutes: 30 },
{ minutes: 15 },
{ seconds: 30 },
{ seconds: 15 }

];

fcViews.agenda = {

'class': AgendaView,
defaults: {
        allDaySlot: true,
        slotDuration: '00:30:00',
        slotEventOverlap: true // a bad name. confused with overlap/constraint system
}

};

fcViews.agendaDay = {

type: 'agenda',
duration: { days: 1 }

};

fcViews.agendaWeek = {

type: 'agenda',
duration: { weeks: 1 }

}; ;;

/* Responsible for the scroller, and forwarding event-related actions into the “grid” */ var ListView = View.extend({

grid: null,
scroller: null,

initialize: function() {
        this.grid = new ListViewGrid(this);
        this.addChild(this.grid);

        this.scroller = new Scroller({
                overflowX: 'hidden',
                overflowY: 'auto'
        });
},

renderSkeleton: function() {
        this.el.addClass(
                'fc-list-view ' +
                this.calendar.theme.getClass('listView')
        );

        this.scroller.render();
        this.scroller.el.appendTo(this.el);

        this.grid.setElement(this.scroller.scrollEl);
},

unrenderSkeleton: function() {
        this.scroller.destroy(); // will remove the Grid too
},

setHeight: function(totalHeight, isAuto) {
        this.scroller.setHeight(this.computeScrollerHeight(totalHeight));
},

computeScrollerHeight: function(totalHeight) {
        return totalHeight -
                subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
},

renderDates: function() {
        this.grid.setRange(this.renderUnzonedRange); // needs to process range-related options
},

isEventDefResizable: function(eventDef) {
        return false;
},

isEventDefDraggable: function(eventDef) {
        return false;
}

});

/* Responsible for event rendering and user-interaction. Its “el” is the inner-content of the above view's scroller. */ var ListViewGrid = Grid.extend({

dayDates: null, // localized ambig-time moment array
dayRanges: null, // UnzonedRange[], of start-end of each day
segSelector: '.fc-list-item', // which elements accept event actions
hasDayInteractions: false, // no day selection or day clicking

rangeUpdated: function() {
        var calendar = this.view.calendar;
        var dayStart = calendar.msToUtcMoment(this.unzonedRange.startMs, true);
        var viewEnd = calendar.msToUtcMoment(this.unzonedRange.endMs, true);
        var dayDates = [];
        var dayRanges = [];

        while (dayStart < viewEnd) {

                dayDates.push(dayStart.clone());

                dayRanges.push(new UnzonedRange(
                        dayStart,
                        dayStart.clone().add(1, 'day')
                ));

                dayStart.add(1, 'day');
        }

        this.dayDates = dayDates;
        this.dayRanges = dayRanges;
},

// slices by day
componentFootprintToSegs: function(footprint) {
        var view = this.view;
        var dayRanges = this.dayRanges;
        var dayIndex;
        var segRange;
        var seg;
        var segs = [];

        for (dayIndex = 0; dayIndex < dayRanges.length; dayIndex++) {
                segRange = footprint.unzonedRange.intersect(dayRanges[dayIndex]);

                if (segRange) {
                        seg = {
                                startMs: segRange.startMs,
                                endMs: segRange.endMs,
                                isStart: segRange.isStart,
                                isEnd: segRange.isEnd,
                                dayIndex: dayIndex
                        };

                        segs.push(seg);

                        // detect when footprint won't go fully into the next day,
                        // and mutate the latest seg to the be the end.
                        if (
                                !seg.isEnd && !footprint.isAllDay &&
                                footprint.unzonedRange.endMs < dayRanges[dayIndex + 1].startMs + view.nextDayThreshold
                        ) {
                                seg.endMs = footprint.unzonedRange.endMs;
                                seg.isEnd = true;
                                break;
                        }
                }
        }

        return segs;
},

// like "4:00am"
computeEventTimeFormat: function() {
        return this.opt('mediumTimeFormat');
},

// for events with a url, the whole <tr> should be clickable,
// but it's impossible to wrap with an <a> tag. simulate this.
handleSegClick: function(seg, ev) {
        var url;

        Grid.prototype.handleSegClick.apply(this, arguments); // super. might prevent the default action

        // not clicking on or within an <a> with an href
        if (!$(ev.target).closest('a[href]').length) {
                url = seg.footprint.eventDef.url;

                if (url && !ev.isDefaultPrevented()) { // jsEvent not cancelled in handler
                        window.location.href = url; // simulate link click
                }
        }
},

// returns list of foreground segs that were actually rendered
renderFgSegs: function(segs) {
        segs = this.renderFgSegEls(segs); // might filter away hidden events

        if (!segs.length) {
                this.renderEmptyMessage();
        }
        else {
                this.renderSegList(segs);
        }

        return segs;
},

renderEmptyMessage: function() {
        this.el.html(
                '<div class="fc-list-empty-wrap2">' + // TODO: try less wraps
                '<div class="fc-list-empty-wrap1">' +
                '<div class="fc-list-empty">' +
                        htmlEscape(this.opt('noEventsMessage')) +
                '</div>' +
                '</div>' +
                '</div>'
        );
},

// render the event segments in the view
renderSegList: function(allSegs) {
        var segsByDay = this.groupSegsByDay(allSegs); // sparse array
        var dayIndex;
        var daySegs;
        var i;
        var tableEl = $('<table class="fc-list-table ' + this.view.calendar.theme.getClass('tableList') + '"><tbody/></table>');
        var tbodyEl = tableEl.find('tbody');

        for (dayIndex = 0; dayIndex < segsByDay.length; dayIndex++) {
                daySegs = segsByDay[dayIndex];

                if (daySegs) { // sparse array, so might be undefined

                        // append a day header
                        tbodyEl.append(this.dayHeaderHtml(this.dayDates[dayIndex]));

                        this.sortEventSegs(daySegs);

                        for (i = 0; i < daySegs.length; i++) {
                                tbodyEl.append(daySegs[i].el); // append event row
                        }
                }
        }

        this.el.empty().append(tableEl);
},

// Returns a sparse array of arrays, segs grouped by their dayIndex
groupSegsByDay: function(segs) {
        var segsByDay = []; // sparse array
        var i, seg;

        for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                (segsByDay[seg.dayIndex] || (segsByDay[seg.dayIndex] = []))
                        .push(seg);
        }

        return segsByDay;
},

// generates the HTML for the day headers that live amongst the event rows
dayHeaderHtml: function(dayDate) {
        var view = this.view;
        var mainFormat = this.opt('listDayFormat');
        var altFormat = this.opt('listDayAltFormat');

        return '<tr class="fc-list-heading" data-date="' + dayDate.format('YYYY-MM-DD') + '">' +
                '<td class="' + view.calendar.theme.getClass('widgetHeader') + '" colspan="3">' +
                        (mainFormat ?
                                view.buildGotoAnchorHtml(
                                        dayDate,
                                        { 'class': 'fc-list-heading-main' },
                                        htmlEscape(dayDate.format(mainFormat)) // inner HTML
                                ) :
                                '') +
                        (altFormat ?
                                view.buildGotoAnchorHtml(
                                        dayDate,
                                        { 'class': 'fc-list-heading-alt' },
                                        htmlEscape(dayDate.format(altFormat)) // inner HTML
                                ) :
                                '') +
                '</td>' +
        '</tr>';
},

// generates the HTML for a single event row
fgSegHtml: function(seg) {
        var view = this.view;
        var calendar = view.calendar;
        var theme = calendar.theme;
        var classes = [ 'fc-list-item' ].concat(this.getSegCustomClasses(seg));
        var bgColor = this.getSegBackgroundColor(seg);
        var eventFootprint = seg.footprint;
        var eventDef = eventFootprint.eventDef;
        var componentFootprint = eventFootprint.componentFootprint;
        var url = eventDef.url;
        var timeHtml;

        if (componentFootprint.isAllDay) {
                timeHtml = view.getAllDayHtml();
        }
        // if the event appears to span more than one day
        else if (view.isMultiDayRange(componentFootprint.unzonedRange)) {
                if (seg.isStart || seg.isEnd) { // outer segment that probably lasts part of the day
                        timeHtml = htmlEscape(this._getEventTimeText(
                                calendar.msToMoment(seg.startMs),
                                calendar.msToMoment(seg.endMs),
                                componentFootprint.isAllDay
                        ));
                }
                else { // inner segment that lasts the whole day
                        timeHtml = view.getAllDayHtml();
                }
        }
        else {
                // Display the normal time text for the *event's* times
                timeHtml = htmlEscape(this.getEventTimeText(eventFootprint));
        }

        if (url) {
                classes.push('fc-has-url');
        }

        return '<tr class="' + classes.join(' ') + '">' +
                (this.displayEventTime ?
                        '<td class="fc-list-item-time ' + theme.getClass('widgetContent') + '">' +
                                (timeHtml || '') +
                        '</td>' :
                        '') +
                '<td class="fc-list-item-marker ' + theme.getClass('widgetContent') + '">' +
                        '<span class="fc-event-dot"' +
                        (bgColor ?
                                ' style="background-color:' + bgColor + '"' :
                                '') +
                        '></span>' +
                '</td>' +
                '<td class="fc-list-item-title ' + theme.getClass('widgetContent') + '">' +
                        '<a' + (url ? ' href="' + htmlEscape(url) + '"' : '') + '>' +
                                htmlEscape(eventDef.title || '') +
                        '</a>' +
                '</td>' +
        '</tr>';
}

});

;;

fcViews.list = {

'class': ListView,
buttonTextKey: 'list', // what to lookup in locale files
defaults: {
        buttonText: 'list', // text to display for English
        listDayFormat: 'LL', // like "January 1, 2016"
        noEventsMessage: 'No events to display'
}

};

fcViews.listDay = {

type: 'list',
duration: { days: 1 },
defaults: {
        listDayFormat: 'dddd' // day-of-week is all we need. full date is probably in header
}

};

fcViews.listWeek = {

type: 'list',
duration: { weeks: 1 },
defaults: {
        listDayFormat: 'dddd', // day-of-week is more important
        listDayAltFormat: 'LL'
}

};

fcViews.listMonth = {

type: 'list',
duration: { month: 1 },
defaults: {
        listDayAltFormat: 'dddd' // day-of-week is nice-to-have
}

};

fcViews.listYear = {

type: 'list',
duration: { year: 1 },
defaults: {
        listDayAltFormat: 'dddd' // day-of-week is nice-to-have
}

};

;;

return FC; // export for Node/CommonJS });