// CodeMirror, copyright © by Marijn Haverbeke and others // Distributed under an MIT license: codemirror.net/LICENSE

// This is CodeMirror (codemirror.net), a code editor // implemented in JavaScript on top of the browser's DOM. // // You can find some technical background for some of the code below // at marijnhaverbeke.nl/blog/#cm-internals .

(function (global, factory) {

typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.CodeMirror = factory());

}(this, (function () { 'use strict';

// Kludges for bugs and behavior differences that can't be feature // detected are enabled based on userAgent etc sniffing. var userAgent = navigator.userAgent var platform = navigator.platform

var gecko = /gecko/d/i.test(userAgent) var ie_upto10 = /MSIE d/.test(userAgent) var ie_11up = /Trident/(?:|d{2,})..*rv:(d+)/.exec(userAgent) var ie = ie_upto10 || ie_11up var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up) var webkit = /WebKit//.test(userAgent) var qtwebkit = webkit && /Qt/d+.d+/.test(userAgent) var chrome = /Chrome//.test(userAgent) var presto = /Opera//.test(userAgent) var safari = /Apple Computer/.test(navigator.vendor) var mac_geMountainLion = /Mac OS X 1dD(|dd)D/.test(userAgent) var phantom = /PhantomJS/.test(userAgent)

var ios = /AppleWebKit/.test(userAgent) && /Mobile/w+/.test(userAgent) // This is woefully incomplete. Suggestions for alternative methods welcome. var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent) var mac = ios || /Mac/.test(platform) var chromeOS = /bCrOSb/.test(userAgent) var windows = /win/i.test(platform)

var presto_version = presto && userAgent.match(/Version/(d*.d*)/) if (presto_version) { presto_version = Number(presto_version) } if (presto_version && presto_version >= 15) { presto = false; webkit = true } // Some browsers use the wrong event properties to signal cmd/ctrl on OS X var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11)) var captureRightClick = gecko || (ie && ie_version >= 9)

function classTest(cls) { return new RegExp(“(^|\s)” + cls + “(?:$|\s)\s*”) }

var rmClass = function(node, cls) {

var current = node.className
var match = classTest(cls).exec(current)
if (match) {
  var after = current.slice(match.index + match[0].length)
  node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
}

}

function removeChildren(e) {

for (var count = e.childNodes.length; count > 0; --count)
  { e.removeChild(e.firstChild) }
return e

}

function removeChildrenAndAdd(parent, e) {

return removeChildren(parent).appendChild(e)

}

function elt(tag, content, className, style) {

var e = document.createElement(tag)
if (className) { e.className = className }
if (style) { e.style.cssText = style }
if (typeof content == "string") { e.appendChild(document.createTextNode(content)) }
else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]) } }
return e

}

var range if (document.createRange) { range = function(node, start, end, endNode) {

var r = document.createRange()
r.setEnd(endNode || node, end)
r.setStart(node, start)
return r

} } else { range = function(node, start, end) {

var r = document.body.createTextRange()
try { r.moveToElementText(node.parentNode) }
catch(e) { return r }
r.collapse(true)
r.moveEnd("character", end)
r.moveStart("character", start)
return r

} }

function contains(parent, child) {

if (child.nodeType == 3) // Android browser always returns false when child is a textnode
  { child = child.parentNode }
if (parent.contains)
  { return parent.contains(child) }
do {
  if (child.nodeType == 11) { child = child.host }
  if (child == parent) { return true }
} while (child = child.parentNode)

}

var activeElt = function() {

var activeElement = document.activeElement
while (activeElement && activeElement.root && activeElement.root.activeElement)
  { activeElement = activeElement.root.activeElement }
return activeElement

} // Older versions of IE throws unspecified error when touching // document.activeElement in some cases (during loading, in iframe) if (ie && ie_version < 11) { activeElt = function() {

try { return document.activeElement }
catch(e) { return document.body }

} }

function addClass(node, cls) {

var current = node.className
if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls }

} function joinClasses(a, b) {

var as = a.split(" ")
for (var i = 0; i < as.length; i++)
  { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i] } }
return b

}

var selectInput = function(node) { node.select() } if (ios) // Mobile Safari apparently has a bug where select() is broken.

{ selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length } }

else if (ie) // Suppress mysterious IE10 errors

{ selectInput = function(node) { try { node.select() } catch(_e) {} } }

function bind(f) {

var args = Array.prototype.slice.call(arguments, 1)
return function(){return f.apply(null, args)}

}

function copyObj(obj, target, overwrite) {

if (!target) { target = {} }
for (var prop in obj)
  { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
    { target[prop] = obj[prop] } }
return target

}

// Counts the column offset in a string, taking tabs into account. // Used mostly to find indentation. function countColumn(string, end, tabSize, startIndex, startValue) {

if (end == null) {
  end = string.search(/[^\s\u00a0]/)
  if (end == -1) { end = string.length }
}
for (var i = startIndex || 0, n = startValue || 0;;) {
  var nextTab = string.indexOf("\t", i)
  if (nextTab < 0 || nextTab >= end)
    { return n + (end - i) }
  n += nextTab - i
  n += tabSize - (n % tabSize)
  i = nextTab + 1
}

}

function Delayed() {this.id = null} Delayed.prototype.set = function(ms, f) {

clearTimeout(this.id)
this.id = setTimeout(f, ms)

}

function indexOf(array, elt) {

for (var i = 0; i < array.length; ++i)
  { if (array[i] == elt) { return i } }
return -1

}

// Number of pixels added to scroller and sizer to hide scrollbar var scrollerGap = 30

// Returned or thrown by various protocols to signal 'I'm not // handling this'. var Pass = {toString: function(){return “CodeMirror.Pass”}}

// Reused option objects for setSelection & friends var sel_dontScroll = {scroll: false}; var sel_mouse = {origin: “*mouse”}; var sel_move = {origin: “+move”}

// The inverse of countColumn – find the offset that corresponds to // a particular column. function findColumn(string, goal, tabSize) {

for (var pos = 0, col = 0;;) {
  var nextTab = string.indexOf("\t", pos)
  if (nextTab == -1) { nextTab = string.length }
  var skipped = nextTab - pos
  if (nextTab == string.length || col + skipped >= goal)
    { return pos + Math.min(skipped, goal - col) }
  col += nextTab - pos
  col += tabSize - (col % tabSize)
  pos = nextTab + 1
  if (col >= goal) { return pos }
}

}

var spaceStrs = [“”] function spaceStr(n) {

while (spaceStrs.length <= n)
  { spaceStrs.push(lst(spaceStrs) + " ") }
return spaceStrs[n]

}

function lst(arr) { return arr }

function map(array, f) {

var out = []
for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i) }
return out

}

function insertSorted(array, value, score) {

var pos = 0, priority = score(value)
while (pos < array.length && score(array[pos]) <= priority) { pos++ }
array.splice(pos, 0, value)

}

function nothing() {}

function createObj(base, props) {

var inst
if (Object.create) {
  inst = Object.create(base)
} else {
  nothing.prototype = base
  inst = new nothing()
}
if (props) { copyObj(props, inst) }
return inst

}

var nonASCIISingleCaseWordChar = /[u00dfu0587u0590-u05f4u0600-u06ffu3040-u309fu30a0-u30ffu3400-u4db5u4e00-u9fccuac00-ud7af]/ function isWordCharBasic(ch) {

return /\w/.test(ch) || ch > "\x80" &&
  (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))

} function isWordChar(ch, helper) {

if (!helper) { return isWordCharBasic(ch) }
if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
return helper.test(ch)

}

function isEmpty(obj) {

for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
return true

}

// Extending unicode characters. A series of a non-extending char + // any number of extending chars is treated as a single unit as far // as editing and measuring is concerned. This is not fully correct, // since some scripts/fonts/browsers also treat other configurations // of code points as a group. var extendingChars = /[u0300-u036fu0483-u0489u0591-u05bdu05bfu05c1u05c2u05c4u05c5u05c7u0610-u061au064b-u065eu0670u06d6-u06dcu06de-u06e4u06e7u06e8u06ea-u06edu0711u0730-u074au07a6-u07b0u07eb-u07f3u0816-u0819u081b-u0823u0825-u0827u0829-u082du0900-u0902u093cu0941-u0948u094du0951-u0955u0962u0963u0981u09bcu09beu09c1-u09c4u09cdu09d7u09e2u09e3u0a01u0a02u0a3cu0a41u0a42u0a47u0a48u0a4b-u0a4du0a51u0a70u0a71u0a75u0a81u0a82u0abcu0ac1-u0ac5u0ac7u0ac8u0acdu0ae2u0ae3u0b01u0b3cu0b3eu0b3fu0b41-u0b44u0b4du0b56u0b57u0b62u0b63u0b82u0bbeu0bc0u0bcdu0bd7u0c3e-u0c40u0c46-u0c48u0c4a-u0c4du0c55u0c56u0c62u0c63u0cbcu0cbfu0cc2u0cc6u0cccu0ccdu0cd5u0cd6u0ce2u0ce3u0d3eu0d41-u0d44u0d4du0d57u0d62u0d63u0dcau0dcfu0dd2-u0dd4u0dd6u0ddfu0e31u0e34-u0e3au0e47-u0e4eu0eb1u0eb4-u0eb9u0ebbu0ebcu0ec8-u0ecdu0f18u0f19u0f35u0f37u0f39u0f71-u0f7eu0f80-u0f84u0f86u0f87u0f90-u0f97u0f99-u0fbcu0fc6u102d-u1030u1032-u1037u1039u103au103du103eu1058u1059u105e-u1060u1071-u1074u1082u1085u1086u108du109du135fu1712-u1714u1732-u1734u1752u1753u1772u1773u17b7-u17bdu17c6u17c9-u17d3u17ddu180b-u180du18a9u1920-u1922u1927u1928u1932u1939-u193bu1a17u1a18u1a56u1a58-u1a5eu1a60u1a62u1a65-u1a6cu1a73-u1a7cu1a7fu1b00-u1b03u1b34u1b36-u1b3au1b3cu1b42u1b6b-u1b73u1b80u1b81u1ba2-u1ba5u1ba8u1ba9u1c2c-u1c33u1c36u1c37u1cd0-u1cd2u1cd4-u1ce0u1ce2-u1ce8u1cedu1dc0-u1de6u1dfd-u1dffu200cu200du20d0-u20f0u2cef-u2cf1u2de0-u2dffu302a-u302fu3099u309aua66f-ua672ua67cua67dua6f0ua6f1ua802ua806ua80bua825ua826ua8c4ua8e0-ua8f1ua926-ua92dua947-ua951ua980-ua982ua9b3ua9b6-ua9b9ua9bcuaa29-uaa2euaa31uaa32uaa35uaa36uaa43uaa4cuaab0uaab2-uaab4uaab7uaab8uaabeuaabfuaac1uabe5uabe8uabedudc00-udfffufb1eufe00-ufe0fufe20-ufe26uff9euff9f]/ function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }

// The display handles the DOM integration, both for input reading // and content drawing. It holds references to DOM nodes and // display-related state.

function Display(place, doc, input) {

var d = this
this.input = input

// Covers bottom-right square when both scrollbars are present.
d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
d.scrollbarFiller.setAttribute("cm-not-content", "true")
// Covers bottom of gutter when coverGutterNextToScrollbar is on
// and h scrollbar is present.
d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
d.gutterFiller.setAttribute("cm-not-content", "true")
// Will contain the actual code, positioned to cover the viewport.
d.lineDiv = elt("div", null, "CodeMirror-code")
// Elements are added to these to represent selection and cursors.
d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
d.cursorDiv = elt("div", null, "CodeMirror-cursors")
// A visibility: hidden element used to find the size of things.
d.measure = elt("div", null, "CodeMirror-measure")
// When lines outside of the viewport are measured, they are drawn in this.
d.lineMeasure = elt("div", null, "CodeMirror-measure")
// Wraps everything that needs to exist inside the vertically-padded coordinate system
d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
                  null, "position: relative; outline: none")
// Moved around its parent to cover visible view.
d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative")
// Set to the height of the document, allowing scrolling.
d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
d.sizerWidth = null
// Behavior of elts with overflow: auto and padding is
// inconsistent across browsers. This is used to ensure the
// scrollable area is big enough.
d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
// Will contain the gutters, if any.
d.gutters = elt("div", null, "CodeMirror-gutters")
d.lineGutter = null
// Actual scrollable element.
d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
d.scroller.setAttribute("tabIndex", "-1")
// The element in which the editor lives.
d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")

// Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true }

if (place) {
  if (place.appendChild) { place.appendChild(d.wrapper) }
  else { place(d.wrapper) }
}

// Current rendered range (may be bigger than the view window).
d.viewFrom = d.viewTo = doc.first
d.reportedViewFrom = d.reportedViewTo = doc.first
// Information about the rendered lines.
d.view = []
d.renderedView = null
// Holds info about a single rendered line when it was rendered
// for measurement, while not in view.
d.externalMeasured = null
// Empty space (in pixels) above the view
d.viewOffset = 0
d.lastWrapHeight = d.lastWrapWidth = 0
d.updateLineNumbers = null

d.nativeBarWidth = d.barHeight = d.barWidth = 0
d.scrollbarsClipped = false

// Used to only resize the line number gutter when necessary (when
// the amount of lines crosses a boundary that makes its width change)
d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
// Set to true when a non-horizontal-scrolling line widget is
// added. As an optimization, line widget aligning is skipped when
// this is false.
d.alignWidgets = false

d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null

// Tracks the maximum line length so that the horizontal scrollbar
// can be kept static when scrolling.
d.maxLine = null
d.maxLineLength = 0
d.maxLineChanged = false

// Used for measuring wheel scrolling granularity
d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null

// True when shift is held down.
d.shift = false

// Used to track whether anything happened since the context menu
// was opened.
d.selForContextMenu = null

d.activeTouch = null

input.init(d)

}

// Find the line object corresponding to the given line number. function getLine(doc, n) {

n -= doc.first
if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
var chunk = doc
while (!chunk.lines) {
  for (var i = 0;; ++i) {
    var child = chunk.children[i], sz = child.chunkSize()
    if (n < sz) { chunk = child; break }
    n -= sz
  }
}
return chunk.lines[n]

}

// Get the part of a document between two positions, as an array of // strings. function getBetween(doc, start, end) {

var out = [], n = start.line
doc.iter(start.line, end.line + 1, function (line) {
  var text = line.text
  if (n == end.line) { text = text.slice(0, end.ch) }
  if (n == start.line) { text = text.slice(start.ch) }
  out.push(text)
  ++n
})
return out

} // Get the lines between from and to, as array of strings. function getLines(doc, from, to) {

var out = []
doc.iter(from, to, function (line) { out.push(line.text) }) // iter aborts when callback returns truthy value
return out

}

// Update the height of a line, propagating the height change // upwards to parent nodes. function updateLineHeight(line, height) {

var diff = height - line.height
if (diff) { for (var n = line; n; n = n.parent) { n.height += diff } }

}

// Given a line object, find its line number by walking up through // its parent links. function lineNo(line) {

if (line.parent == null) { return null }
var cur = line.parent, no = indexOf(cur.lines, line)
for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
  for (var i = 0;; ++i) {
    if (chunk.children[i] == cur) { break }
    no += chunk.children[i].chunkSize()
  }
}
return no + cur.first

}

// Find the line at the given vertical position, using the height // information in the document tree. function lineAtHeight(chunk, h) {

var n = chunk.first
outer: do {
  for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
    var child = chunk.children[i$1], ch = child.height
    if (h < ch) { chunk = child; continue outer }
    h -= ch
    n += child.chunkSize()
  }
  return n
} while (!chunk.lines)
var i = 0
for (; i < chunk.lines.length; ++i) {
  var line = chunk.lines[i], lh = line.height
  if (h < lh) { break }
  h -= lh
}
return n + i

}

function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}

function lineNumberFor(options, i) {

return String(options.lineNumberFormatter(i + options.firstLineNumber))

}

// A Pos instance represents a position within the text. function Pos (line, ch) {

if (!(this instanceof Pos)) { return new Pos(line, ch) }
this.line = line; this.ch = ch

}

// Compare two positions, return 0 if they are the same, a negative // number when a is less, and a positive number otherwise. function cmp(a, b) { return a.line - b.line || a.ch - b.ch }

function copyPos(x) {return Pos(x.line, x.ch)} function maxPos(a, b) { return cmp(a, b) < 0 ? b : a } function minPos(a, b) { return cmp(a, b) < 0 ? a : b }

// Most of the external API clips given positions to make sure they // actually exist within the document. function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))} function clipPos(doc, pos) {

if (pos.line < doc.first) { return Pos(doc.first, 0) }
var last = doc.first + doc.size - 1
if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
return clipToLen(pos, getLine(doc, pos.line).text.length)

} function clipToLen(pos, linelen) {

var ch = pos.ch
if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
else if (ch < 0) { return Pos(pos.line, 0) }
else { return pos }

} function clipPosArray(doc, array) {

var out = []
for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]) }
return out

}

// Optimize some code when these features are not used. var sawReadOnlySpans = false; var sawCollapsedSpans = false

function seeReadOnlySpans() {

sawReadOnlySpans = true

}

function seeCollapsedSpans() {

sawCollapsedSpans = true

}

// TEXTMARKER SPANS

function MarkedSpan(marker, from, to) {

this.marker = marker
this.from = from; this.to = to

}

// Search an array of spans for a span matching the given marker. function getMarkedSpanFor(spans, marker) {

if (spans) { for (var i = 0; i < spans.length; ++i) {
  var span = spans[i]
  if (span.marker == marker) { return span }
} }

} // Remove a span from an array, returning undefined if no spans are // left (we don't store arrays for lines without spans). function removeMarkedSpan(spans, span) {

var r
for (var i = 0; i < spans.length; ++i)
  { if (spans[i] != span) { (r || (r = [])).push(spans[i]) } }
return r

} // Add a span to a line. function addMarkedSpan(line, span) {

line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]
span.marker.attachLine(line)

}

// Used for the algorithm that adjusts markers for a change in the // document. These functions cut an array of spans at a given // character position, returning an array of remaining chunks (or // undefined if nothing remains). function markedSpansBefore(old, startCh, isInsert) {

var nw
if (old) { for (var i = 0; i < old.length; ++i) {
  var span = old[i], marker = span.marker
  var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh)
  if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
    var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to))
  }
} }
return nw

} function markedSpansAfter(old, endCh, isInsert) {

var nw
if (old) { for (var i = 0; i < old.length; ++i) {
  var span = old[i], marker = span.marker
  var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh)
  if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
    var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
                                          span.to == null ? null : span.to - endCh))
  }
} }
return nw

}

// Given a change object, compute the new set of marker spans that // cover the line in which the change took place. Removes spans // entirely within the change, reconnects spans belonging to the // same marker that appear on both sides of the change, and cuts off // spans partially within the change. Returns an array of span // arrays with one element for each line in (after) the change. function stretchSpansOverChange(doc, change) {

if (change.full) { return null }
var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans
var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans
if (!oldFirst && !oldLast) { return null }

var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0
// Get the spans that 'stick out' on both sides
var first = markedSpansBefore(oldFirst, startCh, isInsert)
var last = markedSpansAfter(oldLast, endCh, isInsert)

// Next, merge those two ends
var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0)
if (first) {
  // Fix up .to properties of first
  for (var i = 0; i < first.length; ++i) {
    var span = first[i]
    if (span.to == null) {
      var found = getMarkedSpanFor(last, span.marker)
      if (!found) { span.to = startCh }
      else if (sameLine) { span.to = found.to == null ? null : found.to + offset }
    }
  }
}
if (last) {
  // Fix up .from in last (or move them into first in case of sameLine)
  for (var i$1 = 0; i$1 < last.length; ++i$1) {
    var span$1 = last[i$1]
    if (span$1.to != null) { span$1.to += offset }
    if (span$1.from == null) {
      var found$1 = getMarkedSpanFor(first, span$1.marker)
      if (!found$1) {
        span$1.from = offset
        if (sameLine) { (first || (first = [])).push(span$1) }
      }
    } else {
      span$1.from += offset
      if (sameLine) { (first || (first = [])).push(span$1) }
    }
  }
}
// Make sure we didn't create any zero-length spans
if (first) { first = clearEmptySpans(first) }
if (last && last != first) { last = clearEmptySpans(last) }

var newMarkers = [first]
if (!sameLine) {
  // Fill gap with whole-line-spans
  var gap = change.text.length - 2, gapMarkers
  if (gap > 0 && first)
    { for (var i$2 = 0; i$2 < first.length; ++i$2)
      { if (first[i$2].to == null)
        { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)) } } }
  for (var i$3 = 0; i$3 < gap; ++i$3)
    { newMarkers.push(gapMarkers) }
  newMarkers.push(last)
}
return newMarkers

}

// Remove spans that are empty and don't have a clearWhenEmpty // option of false. function clearEmptySpans(spans) {

for (var i = 0; i < spans.length; ++i) {
  var span = spans[i]
  if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
    { spans.splice(i--, 1) }
}
if (!spans.length) { return null }
return spans

}

// Used to 'clip' out readOnly ranges when making a change. function removeReadOnlyRanges(doc, from, to) {

var markers = null
doc.iter(from.line, to.line + 1, function (line) {
  if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
    var mark = line.markedSpans[i].marker
    if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
      { (markers || (markers = [])).push(mark) }
  } }
})
if (!markers) { return null }
var parts = [{from: from, to: to}]
for (var i = 0; i < markers.length; ++i) {
  var mk = markers[i], m = mk.find(0)
  for (var j = 0; j < parts.length; ++j) {
    var p = parts[j]
    if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
    var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to)
    if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
      { newParts.push({from: p.from, to: m.from}) }
    if (dto > 0 || !mk.inclusiveRight && !dto)
      { newParts.push({from: m.to, to: p.to}) }
    parts.splice.apply(parts, newParts)
    j += newParts.length - 1
  }
}
return parts

}

// Connect or disconnect spans from a line. function detachMarkedSpans(line) {

var spans = line.markedSpans
if (!spans) { return }
for (var i = 0; i < spans.length; ++i)
  { spans[i].marker.detachLine(line) }
line.markedSpans = null

} function attachMarkedSpans(line, spans) {

if (!spans) { return }
for (var i = 0; i < spans.length; ++i)
  { spans[i].marker.attachLine(line) }
line.markedSpans = spans

}

// Helpers used when computing which overlapping collapsed span // counts as the larger one. function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 } function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }

// Returns a number indicating which of two overlapping collapsed // spans is larger (and thus includes the other). Falls back to // comparing ids when the spans cover exactly the same range. function compareCollapsedMarkers(a, b) {

var lenDiff = a.lines.length - b.lines.length
if (lenDiff != 0) { return lenDiff }
var aPos = a.find(), bPos = b.find()
var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b)
if (fromCmp) { return -fromCmp }
var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b)
if (toCmp) { return toCmp }
return b.id - a.id

}

// Find out whether a line ends or starts in a collapsed span. If // so, return the marker for that span. function collapsedSpanAtSide(line, start) {

var sps = sawCollapsedSpans && line.markedSpans, found
if (sps) { for (var sp = void 0, i = 0; i < sps.length; ++i) {
  sp = sps[i]
  if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
      (!found || compareCollapsedMarkers(found, sp.marker) < 0))
    { found = sp.marker }
} }
return found

} function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) } function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }

// Test whether there exists a collapsed span that partially // overlaps (covers the start or end, but not both) of a new span. // Such overlap is not allowed. function conflictingCollapsedRange(doc, lineNo$$1, from, to, marker) {

var line = getLine(doc, lineNo$$1)
var sps = sawCollapsedSpans && line.markedSpans
if (sps) { for (var i = 0; i < sps.length; ++i) {
  var sp = sps[i]
  if (!sp.marker.collapsed) { continue }
  var found = sp.marker.find(0)
  var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker)
  var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker)
  if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
  if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
      fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
    { return true }
} }

}

// A visual line is a line as drawn on the screen. Folding, for // example, can cause multiple logical lines to appear on the same // visual line. This finds the start of the visual line that the // given line is part of (usually that is the line itself). function visualLine(line) {

var merged
while (merged = collapsedSpanAtStart(line))
  { line = merged.find(-1, true).line }
return line

}

// Returns an array of logical lines that continue the visual line // started by the argument, or undefined if there are no such lines. function visualLineContinued(line) {

var merged, lines
while (merged = collapsedSpanAtEnd(line)) {
  line = merged.find(1, true).line
  ;(lines || (lines = [])).push(line)
}
return lines

}

// Get the line number of the start of the visual line that the // given line number is part of. function visualLineNo(doc, lineN) {

var line = getLine(doc, lineN), vis = visualLine(line)
if (line == vis) { return lineN }
return lineNo(vis)

}

// Get the line number of the start of the next visual line after // the given line. function visualLineEndNo(doc, lineN) {

if (lineN > doc.lastLine()) { return lineN }
var line = getLine(doc, lineN), merged
if (!lineIsHidden(doc, line)) { return lineN }
while (merged = collapsedSpanAtEnd(line))
  { line = merged.find(1, true).line }
return lineNo(line) + 1

}

// Compute whether a line is hidden. Lines count as hidden when they // are part of a visual line that starts with another line, or when // they are entirely covered by collapsed, non-widget span. function lineIsHidden(doc, line) {

var sps = sawCollapsedSpans && line.markedSpans
if (sps) { for (var sp = void 0, i = 0; i < sps.length; ++i) {
  sp = sps[i]
  if (!sp.marker.collapsed) { continue }
  if (sp.from == null) { return true }
  if (sp.marker.widgetNode) { continue }
  if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
    { return true }
} }

} function lineIsHiddenInner(doc, line, span) {

if (span.to == null) {
  var end = span.marker.find(1, true)
  return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
}
if (span.marker.inclusiveRight && span.to == line.text.length)
  { return true }
for (var sp = void 0, i = 0; i < line.markedSpans.length; ++i) {
  sp = line.markedSpans[i]
  if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
      (sp.to == null || sp.to != span.from) &&
      (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
      lineIsHiddenInner(doc, line, sp)) { return true }
}

}

// Find the height above the given line. function heightAtLine(lineObj) {

lineObj = visualLine(lineObj)

var h = 0, chunk = lineObj.parent
for (var i = 0; i < chunk.lines.length; ++i) {
  var line = chunk.lines[i]
  if (line == lineObj) { break }
  else { h += line.height }
}
for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
  for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
    var cur = p.children[i$1]
    if (cur == chunk) { break }
    else { h += cur.height }
  }
}
return h

}

// Compute the character length of a line, taking into account // collapsed ranges (see markText) that might hide parts, and join // other lines onto it. function lineLength(line) {

if (line.height == 0) { return 0 }
var len = line.text.length, merged, cur = line
while (merged = collapsedSpanAtStart(cur)) {
  var found = merged.find(0, true)
  cur = found.from.line
  len += found.from.ch - found.to.ch
}
cur = line
while (merged = collapsedSpanAtEnd(cur)) {
  var found$1 = merged.find(0, true)
  len -= cur.text.length - found$1.from.ch
  cur = found$1.to.line
  len += cur.text.length - found$1.to.ch
}
return len

}

// Find the longest line in the document. function findMaxLine(cm) {

var d = cm.display, doc = cm.doc
d.maxLine = getLine(doc, doc.first)
d.maxLineLength = lineLength(d.maxLine)
d.maxLineChanged = true
doc.iter(function (line) {
  var len = lineLength(line)
  if (len > d.maxLineLength) {
    d.maxLineLength = len
    d.maxLine = line
  }
})

}

// BIDI HELPERS

function iterateBidiSections(order, from, to, f) {

if (!order) { return f(from, to, "ltr") }
var found = false
for (var i = 0; i < order.length; ++i) {
  var part = order[i]
  if (part.from < to && part.to > from || from == to && part.to == from) {
    f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr")
    found = true
  }
}
if (!found) { f(from, to, "ltr") }

}

function bidiLeft(part) { return part.level % 2 ? part.to : part.from } function bidiRight(part) { return part.level % 2 ? part.from : part.to }

function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order) : 0 } function lineRight(line) {

var order = getOrder(line)
if (!order) { return line.text.length }
return bidiRight(lst(order))

}

function compareBidiLevel(order, a, b) {

var linedir = order[0].level
if (a == linedir) { return true }
if (b == linedir) { return false }
return a < b

}

var bidiOther = null function getBidiPartAt(order, pos) {

var found
bidiOther = null
for (var i = 0; i < order.length; ++i) {
  var cur = order[i]
  if (cur.from < pos && cur.to > pos) { return i }
  if ((cur.from == pos || cur.to == pos)) {
    if (found == null) {
      found = i
    } else if (compareBidiLevel(order, cur.level, order[found].level)) {
      if (cur.from != cur.to) { bidiOther = found }
      return i
    } else {
      if (cur.from != cur.to) { bidiOther = i }
      return found
    }
  }
}
return found

}

function moveInLine(line, pos, dir, byUnit) {

if (!byUnit) { return pos + dir }
do { pos += dir }
while (pos > 0 && isExtendingChar(line.text.charAt(pos)))
return pos

}

// This is needed in order to move 'visually' through bi-directional // text – i.e., pressing left should make the cursor go left, even // when in RTL text. The tricky part is the 'jumps', where RTL and // LTR text touch each other. This often requires the cursor offset // to move more than one unit, in order to visually move one unit. function moveVisually(line, start, dir, byUnit) {

var bidi = getOrder(line)
if (!bidi) { return moveLogically(line, start, dir, byUnit) }
var pos = getBidiPartAt(bidi, start), part = bidi[pos]
var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit)

for (;;) {
  if (target > part.from && target < part.to) { return target }
  if (target == part.from || target == part.to) {
    if (getBidiPartAt(bidi, target) == pos) { return target }
    part = bidi[pos += dir]
    return (dir > 0) == part.level % 2 ? part.to : part.from
  } else {
    part = bidi[pos += dir]
    if (!part) { return null }
    if ((dir > 0) == part.level % 2)
      { target = moveInLine(line, part.to, -1, byUnit) }
    else
      { target = moveInLine(line, part.from, 1, byUnit) }
  }
}

}

function moveLogically(line, start, dir, byUnit) {

var target = start + dir
if (byUnit) { while (target > 0 && isExtendingChar(line.text.charAt(target))) { target += dir } }
return target < 0 || target > line.text.length ? null : target

}

// Bidirectional ordering algorithm // See unicode.org/reports/tr9/tr9-13.html for the algorithm // that this (partially) implements.

// One-char codes used for character types: // L (L): Left-to-Right // R (R): Right-to-Left // r (AL): Right-to-Left Arabic // 1 (EN): European Number // + (ES): European Number Separator // % (ET): European Number Terminator // n (AN): Arabic Number // , (CS): Common Number Separator // m (NSM): Non-Spacing Mark // b (BN): Boundary Neutral // s (B): Paragraph Separator // t (S): Segment Separator // w (WS): Whitespace // N (ON): Other Neutrals

// Returns null if characters are ordered as they appear // (left-to-right), or an array of sections ({from, to, level} // objects) in the order in which they occur visually. var bidiOrdering = (function() {

// Character types for codepoints 0 to 0xff
var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"
// Character types for codepoints 0x600 to 0x6ff
var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm"
function charType(code) {
  if (code <= 0xf7) { return lowTypes.charAt(code) }
  else if (0x590 <= code && code <= 0x5f4) { return "R" }
  else if (0x600 <= code && code <= 0x6ed) { return arabicTypes.charAt(code - 0x600) }
  else if (0x6ee <= code && code <= 0x8ac) { return "r" }
  else if (0x2000 <= code && code <= 0x200b) { return "w" }
  else if (code == 0x200c) { return "b" }
  else { return "L" }
}

var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/
var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/
// Browsers seem to always treat the boundaries of block elements as being L.
var outerType = "L"

function BidiSpan(level, from, to) {
  this.level = level
  this.from = from; this.to = to
}

return function(str) {
  if (!bidiRE.test(str)) { return false }
  var len = str.length, types = []
  for (var i = 0; i < len; ++i)
    { types.push(charType(str.charCodeAt(i))) }

  // W1. Examine each non-spacing mark (NSM) in the level run, and
  // change the type of the NSM to the type of the previous
  // character. If the NSM is at the start of the level run, it will
  // get the type of sor.
  for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
    var type = types[i$1]
    if (type == "m") { types[i$1] = prev }
    else { prev = type }
  }

  // W2. Search backwards from each instance of a European number
  // until the first strong type (R, L, AL, or sor) is found. If an
  // AL is found, change the type of the European number to Arabic
  // number.
  // W3. Change all ALs to R.
  for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
    var type$1 = types[i$2]
    if (type$1 == "1" && cur == "r") { types[i$2] = "n" }
    else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R" } }
  }

  // W4. A single European separator between two European numbers
  // changes to a European number. A single common separator between
  // two numbers of the same type changes to that type.
  for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
    var type$2 = types[i$3]
    if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1" }
    else if (type$2 == "," && prev$1 == types[i$3+1] &&
             (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1 }
    prev$1 = type$2
  }

  // W5. A sequence of European terminators adjacent to European
  // numbers changes to all European numbers.
  // W6. Otherwise, separators and terminators change to Other
  // Neutral.
  for (var i$4 = 0; i$4 < len; ++i$4) {
    var type$3 = types[i$4]
    if (type$3 == ",") { types[i$4] = "N" }
    else if (type$3 == "%") {
      var end = void 0
      for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
      var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"
      for (var j = i$4; j < end; ++j) { types[j] = replace }
      i$4 = end - 1
    }
  }

  // W7. Search backwards from each instance of a European number
  // until the first strong type (R, L, or sor) is found. If an L is
  // found, then change the type of the European number to L.
  for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
    var type$4 = types[i$5]
    if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L" }
    else if (isStrong.test(type$4)) { cur$1 = type$4 }
  }

  // N1. A sequence of neutrals takes the direction of the
  // surrounding strong text if the text on both sides has the same
  // direction. European and Arabic numbers act as if they were R in
  // terms of their influence on neutrals. Start-of-level-run (sor)
  // and end-of-level-run (eor) are used at level run boundaries.
  // N2. Any remaining neutrals take the embedding direction.
  for (var i$6 = 0; i$6 < len; ++i$6) {
    if (isNeutral.test(types[i$6])) {
      var end$1 = void 0
      for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
      var before = (i$6 ? types[i$6-1] : outerType) == "L"
      var after = (end$1 < len ? types[end$1] : outerType) == "L"
      var replace$1 = before || after ? "L" : "R"
      for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1 }
      i$6 = end$1 - 1
    }
  }

  // Here we depart from the documented algorithm, in order to avoid
  // building up an actual levels array. Since there are only three
  // levels (0, 1, 2) in an implementation that doesn't take
  // explicit embedding into account, we can build up the order on
  // the fly, without following the level-based algorithm.
  var order = [], m
  for (var i$7 = 0; i$7 < len;) {
    if (countsAsLeft.test(types[i$7])) {
      var start = i$7
      for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
      order.push(new BidiSpan(0, start, i$7))
    } else {
      var pos = i$7, at = order.length
      for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
      for (var j$2 = pos; j$2 < i$7;) {
        if (countsAsNum.test(types[j$2])) {
          if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)) }
          var nstart = j$2
          for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
          order.splice(at, 0, new BidiSpan(2, nstart, j$2))
          pos = j$2
        } else { ++j$2 }
      }
      if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)) }
    }
  }
  if (order[0].level == 1 && (m = str.match(/^\s+/))) {
    order[0].from = m[0].length
    order.unshift(new BidiSpan(0, 0, m[0].length))
  }
  if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
    lst(order).to -= m[0].length
    order.push(new BidiSpan(0, len - m[0].length, len))
  }
  if (order[0].level == 2)
    { order.unshift(new BidiSpan(1, order[0].to, order[0].to)) }
  if (order[0].level != lst(order).level)
    { order.push(new BidiSpan(order[0].level, len, len)) }

  return order
}

})()

// Get the bidi ordering for the given line (and cache it). Returns // false for lines that are fully left-to-right, and an array of // BidiSpan objects otherwise. function getOrder(line) {

var order = line.order
if (order == null) { order = line.order = bidiOrdering(line.text) }
return order

}

// EVENT HANDLING

// Lightweight event framework. on/off also work on DOM nodes, // registering native DOM handlers.

var on = function(emitter, type, f) {

if (emitter.addEventListener)
  { emitter.addEventListener(type, f, false) }
else if (emitter.attachEvent)
  { emitter.attachEvent("on" + type, f) }
else {
  var map$$1 = emitter._handlers || (emitter._handlers = {})
  var arr = map$$1[type] || (map$$1[type] = [])
  arr.push(f)
}

}

var noHandlers = [] function getHandlers(emitter, type, copy) {

var arr = emitter._handlers && emitter._handlers[type]
if (copy) { return arr && arr.length > 0 ? arr.slice() : noHandlers }
else { return arr || noHandlers }

}

function off(emitter, type, f) {

if (emitter.removeEventListener)
  { emitter.removeEventListener(type, f, false) }
else if (emitter.detachEvent)
  { emitter.detachEvent("on" + type, f) }
else {
  var handlers = getHandlers(emitter, type, false)
  for (var i = 0; i < handlers.length; ++i)
    { if (handlers[i] == f) { handlers.splice(i, 1); break } }
}

}

function signal(emitter, type /*, values…*/) {

var handlers = getHandlers(emitter, type, true)
if (!handlers.length) { return }
var args = Array.prototype.slice.call(arguments, 2)
for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args) }

}

// The DOM events that CodeMirror handles can be overridden by // registering a (non-DOM) handler on the editor for the event name, // and preventDefault-ing the event in that handler. function signalDOMEvent(cm, e, override) {

if (typeof e == "string")
  { e = {type: e, preventDefault: function() { this.defaultPrevented = true }} }
signal(cm, override || e.type, cm, e)
return e_defaultPrevented(e) || e.codemirrorIgnore

}

function signalCursorActivity(cm) {

var arr = cm._handlers && cm._handlers.cursorActivity
if (!arr) { return }
var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = [])
for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
  { set.push(arr[i]) } }

}

function hasHandler(emitter, type) {

return getHandlers(emitter, type).length > 0

}

// Add on and off methods to a constructor's prototype, to make // registering events on such objects more convenient. function eventMixin(ctor) {

ctor.prototype.on = function(type, f) {on(this, type, f)}
ctor.prototype.off = function(type, f) {off(this, type, f)}

}

// Due to the fact that we still support jurassic IE versions, some // compatibility wrappers are needed.

function e_preventDefault(e) {

if (e.preventDefault) { e.preventDefault() }
else { e.returnValue = false }

} function e_stopPropagation(e) {

if (e.stopPropagation) { e.stopPropagation() }
else { e.cancelBubble = true }

} function e_defaultPrevented(e) {

return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false

} function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)}

function e_target(e) {return e.target || e.srcElement} function e_button(e) {

var b = e.which
if (b == null) {
  if (e.button & 1) { b = 1 }
  else if (e.button & 2) { b = 3 }
  else if (e.button & 4) { b = 2 }
}
if (mac && e.ctrlKey && b == 1) { b = 3 }
return b

}

// Detect drag-and-drop var dragAndDrop = function() {

// There is *some* kind of drag-and-drop support in IE6-8, but I
// couldn't get it to work yet.
if (ie && ie_version < 9) { return false }
var div = elt('div')
return "draggable" in div || "dragDrop" in div

}()

var zwspSupported function zeroWidthElement(measure) {

if (zwspSupported == null) {
  var test = elt("span", "\u200b")
  removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
  if (measure.firstChild.offsetHeight != 0)
    { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8) }
}
var node = zwspSupported ? elt("span", "\u200b") :
  elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
node.setAttribute("cm-text", "")
return node

}

// Feature-detect IE's crummy client rect reporting for bidi text var badBidiRects function hasBadBidiRects(measure) {

if (badBidiRects != null) { return badBidiRects }
var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
var r0 = range(txt, 0, 1).getBoundingClientRect()
var r1 = range(txt, 1, 2).getBoundingClientRect()
removeChildren(measure)
if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
return badBidiRects = (r1.right - r0.right < 3)

}

// See if “”.split is the broken IE version, if so, provide an // alternative way to split lines. var splitLinesAuto = “nnb”.split(/n/).length != 3 ? function (string) {

var pos = 0, result = [], l = string.length
while (pos <= l) {
  var nl = string.indexOf("\n", pos)
  if (nl == -1) { nl = string.length }
  var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
  var rt = line.indexOf("\r")
  if (rt != -1) {
    result.push(line.slice(0, rt))
    pos += rt + 1
  } else {
    result.push(line)
    pos = nl + 1
  }
}
return result

} : function (string) { return string.split(/rn?|n/); }

var hasSelection = window.getSelection ? function (te) {

try { return te.selectionStart != te.selectionEnd }
catch(e) { return false }

} : function (te) {

var range$$1
try {range$$1 = te.ownerDocument.selection.createRange()}
catch(e) {}
if (!range$$1 || range$$1.parentElement() != te) { return false }
return range$$1.compareEndPoints("StartToEnd", range$$1) != 0

}

var hasCopyEvent = (function () {

var e = elt("div")
if ("oncopy" in e) { return true }
e.setAttribute("oncopy", "return;")
return typeof e.oncopy == "function"

})()

var badZoomedRects = null function hasBadZoomedRects(measure) {

if (badZoomedRects != null) { return badZoomedRects }
var node = removeChildrenAndAdd(measure, elt("span", "x"))
var normal = node.getBoundingClientRect()
var fromRange = range(node, 0, 1).getBoundingClientRect()
return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1

}

// Known modes, by name and by MIME var modes = {}; var mimeModes = {}

// Extra arguments are stored as the mode's dependencies, which is // used by (legacy) mechanisms like loadmode.js to automatically // load a mode. (Preferred mechanism is the require/define calls.) function defineMode(name, mode) {

if (arguments.length > 2)
  { mode.dependencies = Array.prototype.slice.call(arguments, 2) }
modes[name] = mode

}

function defineMIME(mime, spec) {

mimeModes[mime] = spec

}

// Given a MIME type, a {name, …options} config object, or a name // string, return a mode config object. function resolveMode(spec) {

if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
  spec = mimeModes[spec]
} else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
  var found = mimeModes[spec.name]
  if (typeof found == "string") { found = {name: found} }
  spec = createObj(found, spec)
  spec.name = found.name
} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
  return resolveMode("application/xml")
} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
  return resolveMode("application/json")
}
if (typeof spec == "string") { return {name: spec} }
else { return spec || {name: "null"} }

}

// Given a mode spec (anything that resolveMode accepts), find and // initialize an actual mode object. function getMode(options, spec) {

spec = resolveMode(spec)
var mfactory = modes[spec.name]
if (!mfactory) { return getMode(options, "text/plain") }
var modeObj = mfactory(options, spec)
if (modeExtensions.hasOwnProperty(spec.name)) {
  var exts = modeExtensions[spec.name]
  for (var prop in exts) {
    if (!exts.hasOwnProperty(prop)) { continue }
    if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop] }
    modeObj[prop] = exts[prop]
  }
}
modeObj.name = spec.name
if (spec.helperType) { modeObj.helperType = spec.helperType }
if (spec.modeProps) { for (var prop$1 in spec.modeProps)
  { modeObj[prop$1] = spec.modeProps[prop$1] } }

return modeObj

}

// This can be used to attach properties to mode objects from // outside the actual mode definition. var modeExtensions = {} function extendMode(mode, properties) {

var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
copyObj(properties, exts)

}

function copyState(mode, state) {

if (state === true) { return state }
if (mode.copyState) { return mode.copyState(state) }
var nstate = {}
for (var n in state) {
  var val = state[n]
  if (val instanceof Array) { val = val.concat([]) }
  nstate[n] = val
}
return nstate

}

// Given a mode and a state (for that mode), find the inner mode and // state at the position that the state refers to. function innerMode(mode, state) {

var info
while (mode.innerMode) {
  info = mode.innerMode(state)
  if (!info || info.mode == mode) { break }
  state = info.state
  mode = info.mode
}
return info || {mode: mode, state: state}

}

function startState(mode, a1, a2) {

return mode.startState ? mode.startState(a1, a2) : true

}

// STRING STREAM

// Fed to the mode parsers, provides helper functions to make // parsers more succinct.

var StringStream = function(string, tabSize) {

this.pos = this.start = 0
this.string = string
this.tabSize = tabSize || 8
this.lastColumnPos = this.lastColumnValue = 0
this.lineStart = 0

}

StringStream.prototype = {

eol: function() {return this.pos >= this.string.length},
sol: function() {return this.pos == this.lineStart},
peek: function() {return this.string.charAt(this.pos) || undefined},
next: function() {
  if (this.pos < this.string.length)
    { return this.string.charAt(this.pos++) }
},
eat: function(match) {
  var ch = this.string.charAt(this.pos)
  var ok
  if (typeof match == "string") { ok = ch == match }
  else { ok = ch && (match.test ? match.test(ch) : match(ch)) }
  if (ok) {++this.pos; return ch}
},
eatWhile: function(match) {
  var start = this.pos
  while (this.eat(match)){}
  return this.pos > start
},
eatSpace: function() {
  var this$1 = this;

  var start = this.pos
  while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos }
  return this.pos > start
},
skipToEnd: function() {this.pos = this.string.length},
skipTo: function(ch) {
  var found = this.string.indexOf(ch, this.pos)
  if (found > -1) {this.pos = found; return true}
},
backUp: function(n) {this.pos -= n},
column: function() {
  if (this.lastColumnPos < this.start) {
    this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)
    this.lastColumnPos = this.start
  }
  return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
},
indentation: function() {
  return countColumn(this.string, null, this.tabSize) -
    (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
},
match: function(pattern, consume, caseInsensitive) {
  if (typeof pattern == "string") {
    var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; }
    var substr = this.string.substr(this.pos, pattern.length)
    if (cased(substr) == cased(pattern)) {
      if (consume !== false) { this.pos += pattern.length }
      return true
    }
  } else {
    var match = this.string.slice(this.pos).match(pattern)
    if (match && match.index > 0) { return null }
    if (match && consume !== false) { this.pos += match[0].length }
    return match
  }
},
current: function(){return this.string.slice(this.start, this.pos)},
hideFirstChars: function(n, inner) {
  this.lineStart += n
  try { return inner() }
  finally { this.lineStart -= n }
}

}

// Compute a style array (an array starting with a mode generation // – for invalidation – followed by pairs of end positions and // style strings), which is used to highlight the tokens on the // line. function highlightLine(cm, line, state, forceToEnd) {

// A styles array always starts with a number identifying the
// mode/overlays that it is based on (for easy invalidation).
var st = [cm.state.modeGen], lineClasses = {}
// Compute the base array of styles
runMode(cm, line.text, cm.doc.mode, state, function (end, style) { return st.push(end, style); },
  lineClasses, forceToEnd)

// Run overlays, adjust style array.
var loop = function ( o ) {
  var overlay = cm.state.overlays[o], i = 1, at = 0
  runMode(cm, line.text, overlay.mode, true, function (end, style) {
    var start = i
    // Ensure there's a token end at the current position, and that i points at it
    while (at < end) {
      var i_end = st[i]
      if (i_end > end)
        { st.splice(i, 1, end, st[i+1], i_end) }
      i += 2
      at = Math.min(end, i_end)
    }
    if (!style) { return }
    if (overlay.opaque) {
      st.splice(start, i - start, end, "overlay " + style)
      i = start + 2
    } else {
      for (; start < i; start += 2) {
        var cur = st[start+1]
        st[start+1] = (cur ? cur + " " : "") + "overlay " + style
      }
    }
  }, lineClasses)
};

for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );

return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}

}

function getLineStyles(cm, line, updateFrontier) {

if (!line.styles || line.styles[0] != cm.state.modeGen) {
  var state = getStateBefore(cm, lineNo(line))
  var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state)
  line.stateAfter = state
  line.styles = result.styles
  if (result.classes) { line.styleClasses = result.classes }
  else if (line.styleClasses) { line.styleClasses = null }
  if (updateFrontier === cm.doc.frontier) { cm.doc.frontier++ }
}
return line.styles

}

function getStateBefore(cm, n, precise) {

var doc = cm.doc, display = cm.display
if (!doc.mode.startState) { return true }
var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter
if (!state) { state = startState(doc.mode) }
else { state = copyState(doc.mode, state) }
doc.iter(pos, n, function (line) {
  processLine(cm, line.text, state)
  var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo
  line.stateAfter = save ? copyState(doc.mode, state) : null
  ++pos
})
if (precise) { doc.frontier = pos }
return state

}

// Lightweight form of highlight – proceed over this line and // update state, but don't save a style array. Used for lines that // aren't currently visible. function processLine(cm, text, state, startAt) {

var mode = cm.doc.mode
var stream = new StringStream(text, cm.options.tabSize)
stream.start = stream.pos = startAt || 0
if (text == "") { callBlankLine(mode, state) }
while (!stream.eol()) {
  readToken(mode, stream, state)
  stream.start = stream.pos
}

}

function callBlankLine(mode, state) {

if (mode.blankLine) { return mode.blankLine(state) }
if (!mode.innerMode) { return }
var inner = innerMode(mode, state)
if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }

}

function readToken(mode, stream, state, inner) {

for (var i = 0; i < 10; i++) {
  if (inner) { inner[0] = innerMode(mode, state).mode }
  var style = mode.token(stream, state)
  if (stream.pos > stream.start) { return style }
}
throw new Error("Mode " + mode.name + " failed to advance stream.")

}

// Utility for getTokenAt and getLineTokens function takeToken(cm, pos, precise, asArray) {

var getObj = function (copy) { return ({
  start: stream.start, end: stream.pos,
  string: stream.current(),
  type: style || null,
  state: copy ? copyState(doc.mode, state) : state
}); }

var doc = cm.doc, mode = doc.mode, style
pos = clipPos(doc, pos)
var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise)
var stream = new StringStream(line.text, cm.options.tabSize), tokens
if (asArray) { tokens = [] }
while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
  stream.start = stream.pos
  style = readToken(mode, stream, state)
  if (asArray) { tokens.push(getObj(true)) }
}
return asArray ? tokens : getObj()

}

function extractLineClasses(type, output) {

if (type) { for (;;) {
  var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/)
  if (!lineClass) { break }
  type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length)
  var prop = lineClass[1] ? "bgClass" : "textClass"
  if (output[prop] == null)
    { output[prop] = lineClass[2] }
  else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
    { output[prop] += " " + lineClass[2] }
} }
return type

}

// Run the given mode's parser over a line, calling f for each token. function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {

var flattenSpans = mode.flattenSpans
if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans }
var curStart = 0, curStyle = null
var stream = new StringStream(text, cm.options.tabSize), style
var inner = cm.options.addModeClass && [null]
if (text == "") { extractLineClasses(callBlankLine(mode, state), lineClasses) }
while (!stream.eol()) {
  if (stream.pos > cm.options.maxHighlightLength) {
    flattenSpans = false
    if (forceToEnd) { processLine(cm, text, state, stream.pos) }
    stream.pos = text.length
    style = null
  } else {
    style = extractLineClasses(readToken(mode, stream, state, inner), lineClasses)
  }
  if (inner) {
    var mName = inner[0].name
    if (mName) { style = "m-" + (style ? mName + " " + style : mName) }
  }
  if (!flattenSpans || curStyle != style) {
    while (curStart < stream.start) {
      curStart = Math.min(stream.start, curStart + 5000)
      f(curStart, curStyle)
    }
    curStyle = style
  }
  stream.start = stream.pos
}
while (curStart < stream.pos) {
  // Webkit seems to refuse to render text nodes longer than 57444
  // characters, and returns inaccurate measurements in nodes
  // starting around 5000 chars.
  var pos = Math.min(stream.pos, curStart + 5000)
  f(pos, curStyle)
  curStart = pos
}

}

// Finds the line to start with when starting a parse. Tries to // find a line with a stateAfter, so that it can start with a // valid state. If that fails, it returns the line with the // smallest indentation, which tends to need the least context to // parse correctly. function findStartLine(cm, n, precise) {

var minindent, minline, doc = cm.doc
var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100)
for (var search = n; search > lim; --search) {
  if (search <= doc.first) { return doc.first }
  var line = getLine(doc, search - 1)
  if (line.stateAfter && (!precise || search <= doc.frontier)) { return search }
  var indented = countColumn(line.text, null, cm.options.tabSize)
  if (minline == null || minindent > indented) {
    minline = search - 1
    minindent = indented
  }
}
return minline

}

// LINE DATA STRUCTURE

// Line objects. These hold state related to a line, including // highlighting info (the styles array). function Line(text, markedSpans, estimateHeight) {

this.text = text
attachMarkedSpans(this, markedSpans)
this.height = estimateHeight ? estimateHeight(this) : 1

} eventMixin(Line) Line.prototype.lineNo = function() { return lineNo(this) }

// Change the content (text, markers) of a line. Automatically // invalidates cached information and tries to re-estimate the // line's height. function updateLine(line, text, markedSpans, estimateHeight) {

line.text = text
if (line.stateAfter) { line.stateAfter = null }
if (line.styles) { line.styles = null }
if (line.order != null) { line.order = null }
detachMarkedSpans(line)
attachMarkedSpans(line, markedSpans)
var estHeight = estimateHeight ? estimateHeight(line) : 1
if (estHeight != line.height) { updateLineHeight(line, estHeight) }

}

// Detach a line from the document tree and its markers. function cleanUpLine(line) {

line.parent = null
detachMarkedSpans(line)

}

// Convert a style as returned by a mode (either null, or a string // containing one or more styles) to a CSS style. This is cached, // and also looks for line-wide styles. var styleToClassCache = {}; var styleToClassCacheWithMode = {} function interpretTokenStyle(style, options) {

if (!style || /^\s*$/.test(style)) { return null }
var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
return cache[style] ||
  (cache[style] = style.replace(/\S+/g, "cm-$&"))

}

// Render the DOM representation of the text of a line. Also builds // up a 'line map', which points at the DOM nodes that represent // specific stretches of text, and is used by the measuring code. // The returned object contains the DOM node, this map, and // information about line-wide styles that were set by the mode. function buildLineContent(cm, lineView) {

// The padding-right forces the element to have a 'border', which
// is needed on Webkit to be able to get line-level bounding
// rectangles for it (in measureChar).
var content = elt("span", null, null, webkit ? "padding-right: .1px" : null)
var builder = {pre: elt("pre", [content], "CodeMirror-line"), content: content,
               col: 0, pos: 0, cm: cm,
               trailingSpace: false,
               splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}
lineView.measure = {}

// Iterate over the logical lines that make up this visual line.
for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
  var line = i ? lineView.rest[i - 1] : lineView.line, order = void 0
  builder.pos = 0
  builder.addToken = buildToken
  // Optionally wire in some hacks into the token-rendering
  // algorithm, to deal with browser quirks.
  if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
    { builder.addToken = buildTokenBadBidi(builder.addToken, order) }
  builder.map = []
  var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
  insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
  if (line.styleClasses) {
    if (line.styleClasses.bgClass)
      { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "") }
    if (line.styleClasses.textClass)
      { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "") }
  }

  // Ensure at least a single node is present, for measuring.
  if (builder.map.length == 0)
    { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))) }

  // Store the map and a cache object for the current logical line
  if (i == 0) {
    lineView.measure.map = builder.map
    lineView.measure.cache = {}
  } else {
    (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
    ;(lineView.measure.caches || (lineView.measure.caches = [])).push({})
  }
}

// See issue #2901
if (webkit) {
  var last = builder.content.lastChild
  if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
    { builder.content.className = "cm-tab-wrap-hack" }
}

signal(cm, "renderLine", cm, lineView.line, builder.pre)
if (builder.pre.className)
  { builder.textClass = joinClasses(builder.pre.className, builder.textClass || "") }

return builder

}

function defaultSpecialCharPlaceholder(ch) {

var token = elt("span", "\u2022", "cm-invalidchar")
token.title = "\\u" + ch.charCodeAt(0).toString(16)
token.setAttribute("aria-label", token.title)
return token

}

// Build up the DOM representation for a single token, and add it to // the line map. Takes care to render special characters separately. function buildToken(builder, text, style, startStyle, endStyle, title, css) {

if (!text) { return }
var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
var special = builder.cm.state.specialChars, mustWrap = false
var content
if (!special.test(text)) {
  builder.col += text.length
  content = document.createTextNode(displayText)
  builder.map.push(builder.pos, builder.pos + text.length, content)
  if (ie && ie_version < 9) { mustWrap = true }
  builder.pos += text.length
} else {
  content = document.createDocumentFragment()
  var pos = 0
  while (true) {
    special.lastIndex = pos
    var m = special.exec(text)
    var skipped = m ? m.index - pos : text.length - pos
    if (skipped) {
      var txt = document.createTextNode(displayText.slice(pos, pos + skipped))
      if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])) }
      else { content.appendChild(txt) }
      builder.map.push(builder.pos, builder.pos + skipped, txt)
      builder.col += skipped
      builder.pos += skipped
    }
    if (!m) { break }
    pos += skipped + 1
    var txt$1 = void 0
    if (m[0] == "\t") {
      var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
      txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
      txt$1.setAttribute("role", "presentation")
      txt$1.setAttribute("cm-text", "\t")
      builder.col += tabWidth
    } else if (m[0] == "\r" || m[0] == "\n") {
      txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
      txt$1.setAttribute("cm-text", m[0])
      builder.col += 1
    } else {
      txt$1 = builder.cm.options.specialCharPlaceholder(m[0])
      txt$1.setAttribute("cm-text", m[0])
      if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])) }
      else { content.appendChild(txt$1) }
      builder.col += 1
    }
    builder.map.push(builder.pos, builder.pos + 1, txt$1)
    builder.pos++
  }
}
builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
if (style || startStyle || endStyle || mustWrap || css) {
  var fullStyle = style || ""
  if (startStyle) { fullStyle += startStyle }
  if (endStyle) { fullStyle += endStyle }
  var token = elt("span", [content], fullStyle, css)
  if (title) { token.title = title }
  return builder.content.appendChild(token)
}
builder.content.appendChild(content)

}

function splitSpaces(text, trailingBefore) {

if (text.length > 1 && !/  /.test(text)) { return text }
var spaceBefore = trailingBefore, result = ""
for (var i = 0; i < text.length; i++) {
  var ch = text.charAt(i)
  if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
    { ch = "\u00a0" }
  result += ch
  spaceBefore = ch == " "
}
return result

}

// Work around nonsense dimensions being reported for stretches of // right-to-left text. function buildTokenBadBidi(inner, order) {

return function (builder, text, style, startStyle, endStyle, title, css) {
  style = style ? style + " cm-force-border" : "cm-force-border"
  var start = builder.pos, end = start + text.length
  for (;;) {
    // Find the part that overlaps with the start of this text
    var part = void 0
    for (var i = 0; i < order.length; i++) {
      part = order[i]
      if (part.to > start && part.from <= start) { break }
    }
    if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
    inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css)
    startStyle = null
    text = text.slice(part.to - start)
    start = part.to
  }
}

}

function buildCollapsedSpan(builder, size, marker, ignoreWidget) {

var widget = !ignoreWidget && marker.widgetNode
if (widget) { builder.map.push(builder.pos, builder.pos + size, widget) }
if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
  if (!widget)
    { widget = builder.content.appendChild(document.createElement("span")) }
  widget.setAttribute("cm-marker", marker.id)
}
if (widget) {
  builder.cm.display.input.setUneditable(widget)
  builder.content.appendChild(widget)
}
builder.pos += size
builder.trailingSpace = false

}

// Outputs a number of spans to make up a line, taking highlighting // and marked text into account. function insertLineContent(line, builder, styles) {

var spans = line.markedSpans, allText = line.text, at = 0
if (!spans) {
  for (var i$1 = 1; i$1 < styles.length; i$1+=2)
    { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)) }
  return
}

var len = allText.length, pos = 0, i = 1, text = "", style, css
var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed
for (;;) {
  if (nextChange == pos) { // Update current marker set
    spanStyle = spanEndStyle = spanStartStyle = title = css = ""
    collapsed = null; nextChange = Infinity
    var foundBookmarks = [], endStyles = void 0
    for (var j = 0; j < spans.length; ++j) {
      var sp = spans[j], m = sp.marker
      if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
        foundBookmarks.push(m)
      } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
        if (sp.to != null && sp.to != pos && nextChange > sp.to) {
          nextChange = sp.to
          spanEndStyle = ""
        }
        if (m.className) { spanStyle += " " + m.className }
        if (m.css) { css = (css ? css + ";" : "") + m.css }
        if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle }
        if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to) }
        if (m.title && !title) { title = m.title }
        if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
          { collapsed = sp }
      } else if (sp.from > pos && nextChange > sp.from) {
        nextChange = sp.from
      }
    }
    if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
      { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1] } } }

    if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
      { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]) } }
    if (collapsed && (collapsed.from || 0) == pos) {
      buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
                         collapsed.marker, collapsed.from == null)
      if (collapsed.to == null) { return }
      if (collapsed.to == pos) { collapsed = false }
    }
  }
  if (pos >= len) { break }

  var upto = Math.min(len, nextChange)
  while (true) {
    if (text) {
      var end = pos + text.length
      if (!collapsed) {
        var tokenText = end > upto ? text.slice(0, upto - pos) : text
        builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
                         spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css)
      }
      if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
      pos = end
      spanStartStyle = ""
    }
    text = allText.slice(at, at = styles[i++])
    style = interpretTokenStyle(styles[i++], builder.cm.options)
  }
}

}

// These objects are used to represent the visible (currently drawn) // part of the document. A LineView may correspond to multiple // logical lines, if those are connected by collapsed ranges. function LineView(doc, line, lineN) {

// The starting line
this.line = line
// Continuing lines, if any
this.rest = visualLineContinued(line)
// Number of logical lines in this visual line
this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
this.node = this.text = null
this.hidden = lineIsHidden(doc, line)

}

// Create a range of LineView objects for the given lines. function buildViewArray(cm, from, to) {

var array = [], nextPos
for (var pos = from; pos < to; pos = nextPos) {
  var view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
  nextPos = pos + view.size
  array.push(view)
}
return array

}

var operationGroup = null

function pushOperation(op) {

if (operationGroup) {
  operationGroup.ops.push(op)
} else {
  op.ownsGroup = operationGroup = {
    ops: [op],
    delayedCallbacks: []
  }
}

}

function fireCallbacksForOps(group) {

// Calls delayed callbacks and cursorActivity handlers until no
// new ones appear
var callbacks = group.delayedCallbacks, i = 0
do {
  for (; i < callbacks.length; i++)
    { callbacks[i].call(null) }
  for (var j = 0; j < group.ops.length; j++) {
    var op = group.ops[j]
    if (op.cursorActivityHandlers)
      { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
        { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) } }
  }
} while (i < callbacks.length)

}

function finishOperation(op, endCb) {

var group = op.ownsGroup
if (!group) { return }

try { fireCallbacksForOps(group) }
finally {
  operationGroup = null
  endCb(group)
}

}

var orphanDelayedCallbacks = null

// Often, we want to signal events at a point where we are in the // middle of some work, but don't want the handler to start calling // other methods on the editor, which might be in an inconsistent // state or simply not expect any other events to happen. // signalLater looks whether there are any handlers, and schedules // them to be executed when the last operation ends, or, if no // operation is active, when a timeout fires. function signalLater(emitter, type /*, values…*/) {

var arr = getHandlers(emitter, type, false)
if (!arr.length) { return }
var args = Array.prototype.slice.call(arguments, 2), list
if (operationGroup) {
  list = operationGroup.delayedCallbacks
} else if (orphanDelayedCallbacks) {
  list = orphanDelayedCallbacks
} else {
  list = orphanDelayedCallbacks = []
  setTimeout(fireOrphanDelayed, 0)
}
var loop = function ( i ) {
  list.push(function () { return arr[i].apply(null, args); })
};

for (var i = 0; i < arr.length; ++i)
  loop( i );

}

function fireOrphanDelayed() {

var delayed = orphanDelayedCallbacks
orphanDelayedCallbacks = null
for (var i = 0; i < delayed.length; ++i) { delayed[i]() }

}

// When an aspect of a line changes, a string is added to // lineView.changes. This updates the relevant part of the line's // DOM structure. function updateLineForChanges(cm, lineView, lineN, dims) {

for (var j = 0; j < lineView.changes.length; j++) {
  var type = lineView.changes[j]
  if (type == "text") { updateLineText(cm, lineView) }
  else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims) }
  else if (type == "class") { updateLineClasses(lineView) }
  else if (type == "widget") { updateLineWidgets(cm, lineView, dims) }
}
lineView.changes = null

}

// Lines with gutter elements, widgets or a background class need to // be wrapped, and have the extra elements added to the wrapper div function ensureLineWrapped(lineView) {

if (lineView.node == lineView.text) {
  lineView.node = elt("div", null, null, "position: relative")
  if (lineView.text.parentNode)
    { lineView.text.parentNode.replaceChild(lineView.node, lineView.text) }
  lineView.node.appendChild(lineView.text)
  if (ie && ie_version < 8) { lineView.node.style.zIndex = 2 }
}
return lineView.node

}

function updateLineBackground(lineView) {

var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
if (cls) { cls += " CodeMirror-linebackground" }
if (lineView.background) {
  if (cls) { lineView.background.className = cls }
  else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
} else if (cls) {
  var wrap = ensureLineWrapped(lineView)
  lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
}

}

// Wrapper around buildLineContent which will reuse the structure // in display.externalMeasured when possible. function getLineContent(cm, lineView) {

var ext = cm.display.externalMeasured
if (ext && ext.line == lineView.line) {
  cm.display.externalMeasured = null
  lineView.measure = ext.measure
  return ext.built
}
return buildLineContent(cm, lineView)

}

// Redraw the line's text. Interacts with the background and text // classes because the mode may output tokens that influence these // classes. function updateLineText(cm, lineView) {

var cls = lineView.text.className
var built = getLineContent(cm, lineView)
if (lineView.text == lineView.node) { lineView.node = built.pre }
lineView.text.parentNode.replaceChild(built.pre, lineView.text)
lineView.text = built.pre
if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
  lineView.bgClass = built.bgClass
  lineView.textClass = built.textClass
  updateLineClasses(lineView)
} else if (cls) {
  lineView.text.className = cls
}

}

function updateLineClasses(lineView) {

updateLineBackground(lineView)
if (lineView.line.wrapClass)
  { ensureLineWrapped(lineView).className = lineView.line.wrapClass }
else if (lineView.node != lineView.text)
  { lineView.node.className = "" }
var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
lineView.text.className = textClass || ""

}

function updateLineGutter(cm, lineView, lineN, dims) {

if (lineView.gutter) {
  lineView.node.removeChild(lineView.gutter)
  lineView.gutter = null
}
if (lineView.gutterBackground) {
  lineView.node.removeChild(lineView.gutterBackground)
  lineView.gutterBackground = null
}
if (lineView.line.gutterClass) {
  var wrap = ensureLineWrapped(lineView)
  lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
                                  ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"))
  wrap.insertBefore(lineView.gutterBackground, lineView.text)
}
var markers = lineView.line.gutterMarkers
if (cm.options.lineNumbers || markers) {
  var wrap$1 = ensureLineWrapped(lineView)
  var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"))
  cm.display.input.setUneditable(gutterWrap)
  wrap$1.insertBefore(gutterWrap, lineView.text)
  if (lineView.line.gutterClass)
    { gutterWrap.className += " " + lineView.line.gutterClass }
  if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
    { lineView.lineNumber = gutterWrap.appendChild(
      elt("div", lineNumberFor(cm.options, lineN),
          "CodeMirror-linenumber CodeMirror-gutter-elt",
          ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))) }
  if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
    var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
    if (found)
      { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
                                 ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))) }
  } }
}

}

function updateLineWidgets(cm, lineView, dims) {

if (lineView.alignable) { lineView.alignable = null }
for (var node = lineView.node.firstChild, next = void 0; node; node = next) {
  next = node.nextSibling
  if (node.className == "CodeMirror-linewidget")
    { lineView.node.removeChild(node) }
}
insertLineWidgets(cm, lineView, dims)

}

// Build a line's DOM representation from scratch function buildLineElement(cm, lineView, lineN, dims) {

var built = getLineContent(cm, lineView)
lineView.text = lineView.node = built.pre
if (built.bgClass) { lineView.bgClass = built.bgClass }
if (built.textClass) { lineView.textClass = built.textClass }

updateLineClasses(lineView)
updateLineGutter(cm, lineView, lineN, dims)
insertLineWidgets(cm, lineView, dims)
return lineView.node

}

// A lineView may contain multiple logical lines (when merged by // collapsed spans). The widgets for all of them need to be drawn. function insertLineWidgets(cm, lineView, dims) {

insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
  { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false) } }

}

function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {

if (!line.widgets) { return }
var wrap = ensureLineWrapped(lineView)
for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
  var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
  if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true") }
  positionLineWidget(widget, node, lineView, dims)
  cm.display.input.setUneditable(node)
  if (allowAbove && widget.above)
    { wrap.insertBefore(node, lineView.gutter || lineView.text) }
  else
    { wrap.appendChild(node) }
  signalLater(widget, "redraw")
}

}

function positionLineWidget(widget, node, lineView, dims) {

if (widget.noHScroll) {
  (lineView.alignable || (lineView.alignable = [])).push(node)
  var width = dims.wrapperWidth
  node.style.left = dims.fixedPos + "px"
  if (!widget.coverGutter) {
    width -= dims.gutterTotalWidth
    node.style.paddingLeft = dims.gutterTotalWidth + "px"
  }
  node.style.width = width + "px"
}
if (widget.coverGutter) {
  node.style.zIndex = 5
  node.style.position = "relative"
  if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px" }
}

}

function widgetHeight(widget) {

if (widget.height != null) { return widget.height }
var cm = widget.doc.cm
if (!cm) { return 0 }
if (!contains(document.body, widget.node)) {
  var parentStyle = "position: relative;"
  if (widget.coverGutter)
    { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;" }
  if (widget.noHScroll)
    { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;" }
  removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle))
}
return widget.height = widget.node.parentNode.offsetHeight

}

// Return true when the given mouse event happened in a widget function eventInWidget(display, e) {

for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
  if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
      (n.parentNode == display.sizer && n != display.mover))
    { return true }
}

}

// POSITION MEASUREMENT

function paddingTop(display) {return display.lineSpace.offsetTop} function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight} function paddingH(display) {

if (display.cachedPaddingH) { return display.cachedPaddingH }
var e = removeChildrenAndAdd(display.measure, elt("pre", "x"))
var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle
var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}
if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data }
return data

}

function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth } function displayWidth(cm) {

return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth

} function displayHeight(cm) {

return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight

}

// Ensure the lineView.wrapping.heights array is populated. This is // an array of bottom offsets for the lines that make up a drawn // line. When lineWrapping is on, there might be more than one // height. function ensureLineHeights(cm, lineView, rect) {

var wrapping = cm.options.lineWrapping
var curWidth = wrapping && displayWidth(cm)
if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
  var heights = lineView.measure.heights = []
  if (wrapping) {
    lineView.measure.width = curWidth
    var rects = lineView.text.firstChild.getClientRects()
    for (var i = 0; i < rects.length - 1; i++) {
      var cur = rects[i], next = rects[i + 1]
      if (Math.abs(cur.bottom - next.bottom) > 2)
        { heights.push((cur.bottom + next.top) / 2 - rect.top) }
    }
  }
  heights.push(rect.bottom - rect.top)
}

}

// Find a line map (mapping character offsets to text nodes) and a // measurement cache for the given line number. (A line view might // contain multiple lines when collapsed ranges are present.) function mapFromLineView(lineView, line, lineN) {

if (lineView.line == line)
  { return {map: lineView.measure.map, cache: lineView.measure.cache} }
for (var i = 0; i < lineView.rest.length; i++)
  { if (lineView.rest[i] == line)
    { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
  { if (lineNo(lineView.rest[i$1]) > lineN)
    { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }

}

// Render a line into the hidden node display.externalMeasured. Used // when measurement is needed for a line that's not in the viewport. function updateExternalMeasurement(cm, line) {

line = visualLine(line)
var lineN = lineNo(line)
var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN)
view.lineN = lineN
var built = view.built = buildLineContent(cm, view)
view.text = built.pre
removeChildrenAndAdd(cm.display.lineMeasure, built.pre)
return view

}

// Get a {top, bottom, left, right} box (in line-local coordinates) // for a given character. function measureChar(cm, line, ch, bias) {

return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)

}

// Find a line view that corresponds to the given line number. function findViewForLine(cm, lineN) {

if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
  { return cm.display.view[findViewIndex(cm, lineN)] }
var ext = cm.display.externalMeasured
if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
  { return ext }

}

// Measurement can be split in two steps, the set-up work that // applies to the whole line, and the measurement of the actual // character. Functions like coordsChar, that need to do a lot of // measurements in a row, can thus ensure that the set-up work is // only done once. function prepareMeasureForLine(cm, line) {

var lineN = lineNo(line)
var view = findViewForLine(cm, lineN)
if (view && !view.text) {
  view = null
} else if (view && view.changes) {
  updateLineForChanges(cm, view, lineN, getDimensions(cm))
  cm.curOp.forceUpdate = true
}
if (!view)
  { view = updateExternalMeasurement(cm, line) }

var info = mapFromLineView(view, line, lineN)
return {
  line: line, view: view, rect: null,
  map: info.map, cache: info.cache, before: info.before,
  hasHeights: false
}

}

// Given a prepared measurement object, measures the position of an // actual character (or fetches it from the cache). function measureCharPrepared(cm, prepared, ch, bias, varHeight) {

if (prepared.before) { ch = -1 }
var key = ch + (bias || ""), found
if (prepared.cache.hasOwnProperty(key)) {
  found = prepared.cache[key]
} else {
  if (!prepared.rect)
    { prepared.rect = prepared.view.text.getBoundingClientRect() }
  if (!prepared.hasHeights) {
    ensureLineHeights(cm, prepared.view, prepared.rect)
    prepared.hasHeights = true
  }
  found = measureCharInner(cm, prepared, ch, bias)
  if (!found.bogus) { prepared.cache[key] = found }
}
return {left: found.left, right: found.right,
        top: varHeight ? found.rtop : found.top,
        bottom: varHeight ? found.rbottom : found.bottom}

}

var nullRect = {left: 0, right: 0, top: 0, bottom: 0}

function nodeAndOffsetInLineMap(map$$1, ch, bias) {

var node, start, end, collapse, mStart, mEnd
// First, search the line map for the text node corresponding to,
// or closest to, the target character.
for (var i = 0; i < map$$1.length; i += 3) {
  mStart = map$$1[i]
  mEnd = map$$1[i + 1]
  if (ch < mStart) {
    start = 0; end = 1
    collapse = "left"
  } else if (ch < mEnd) {
    start = ch - mStart
    end = start + 1
  } else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
    end = mEnd - mStart
    start = end - 1
    if (ch >= mEnd) { collapse = "right" }
  }
  if (start != null) {
    node = map$$1[i + 2]
    if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
      { collapse = bias }
    if (bias == "left" && start == 0)
      { while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
        node = map$$1[(i -= 3) + 2]
        collapse = "left"
      } }
    if (bias == "right" && start == mEnd - mStart)
      { while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
        node = map$$1[(i += 3) + 2]
        collapse = "right"
      } }
    break
  }
}
return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}

}

function getUsefulRect(rects, bias) {

var rect = nullRect
if (bias == "left") { for (var i = 0; i < rects.length; i++) {
  if ((rect = rects[i]).left != rect.right) { break }
} } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
  if ((rect = rects[i$1]).left != rect.right) { break }
} }
return rect

}

function measureCharInner(cm, prepared, ch, bias) {

var place = nodeAndOffsetInLineMap(prepared.map, ch, bias)
var node = place.node, start = place.start, end = place.end, collapse = place.collapse

var rect
if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
  for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
    while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start }
    while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end }
    if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
      { rect = node.parentNode.getBoundingClientRect() }
    else
      { rect = getUsefulRect(range(node, start, end).getClientRects(), bias) }
    if (rect.left || rect.right || start == 0) { break }
    end = start
    start = start - 1
    collapse = "right"
  }
  if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect) }
} else { // If it is a widget, simply get the box for the whole widget.
  if (start > 0) { collapse = bias = "right" }
  var rects
  if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
    { rect = rects[bias == "right" ? rects.length - 1 : 0] }
  else
    { rect = node.getBoundingClientRect() }
}
if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
  var rSpan = node.parentNode.getClientRects()[0]
  if (rSpan)
    { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom} }
  else
    { rect = nullRect }
}

var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top
var mid = (rtop + rbot) / 2
var heights = prepared.view.measure.heights
var i = 0
for (; i < heights.length - 1; i++)
  { if (mid < heights[i]) { break } }
var top = i ? heights[i - 1] : 0, bot = heights[i]
var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
              right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
              top: top, bottom: bot}
if (!rect.left && !rect.right) { result.bogus = true }
if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot }

return result

}

// Work around problem with bounding client rects on ranges being // returned incorrectly when zoomed on IE10 and below. function maybeUpdateRectForZooming(measure, rect) {

if (!window.screen || screen.logicalXDPI == null ||
    screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
  { return rect }
var scaleX = screen.logicalXDPI / screen.deviceXDPI
var scaleY = screen.logicalYDPI / screen.deviceYDPI
return {left: rect.left * scaleX, right: rect.right * scaleX,
        top: rect.top * scaleY, bottom: rect.bottom * scaleY}

}

function clearLineMeasurementCacheFor(lineView) {

if (lineView.measure) {
  lineView.measure.cache = {}
  lineView.measure.heights = null
  if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
    { lineView.measure.caches[i] = {} } }
}

}

function clearLineMeasurementCache(cm) {

cm.display.externalMeasure = null
removeChildren(cm.display.lineMeasure)
for (var i = 0; i < cm.display.view.length; i++)
  { clearLineMeasurementCacheFor(cm.display.view[i]) }

}

function clearCaches(cm) {

clearLineMeasurementCache(cm)
cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null
if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true }
cm.display.lineNumChars = null

}

function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft } function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop }

// Converts a {top, bottom, left, right} box from line-local // coordinates into another coordinate system. Context may be one of // “line”, “div” (display.lineDiv), “local”./null (editor), “window”, // or “page”. function intoCoordSystem(cm, lineObj, rect, context) {

if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above) {
  var size = widgetHeight(lineObj.widgets[i])
  rect.top += size; rect.bottom += size
} } }
if (context == "line") { return rect }
if (!context) { context = "local" }
var yOff = heightAtLine(lineObj)
if (context == "local") { yOff += paddingTop(cm.display) }
else { yOff -= cm.display.viewOffset }
if (context == "page" || context == "window") {
  var lOff = cm.display.lineSpace.getBoundingClientRect()
  yOff += lOff.top + (context == "window" ? 0 : pageScrollY())
  var xOff = lOff.left + (context == "window" ? 0 : pageScrollX())
  rect.left += xOff; rect.right += xOff
}
rect.top += yOff; rect.bottom += yOff
return rect

}

// Coverts a box from “div” coords to another coordinate system. // Context may be “window”, “page”, “div”, or “local”./null. function fromCoordSystem(cm, coords, context) {

if (context == "div") { return coords }
var left = coords.left, top = coords.top
// First move into "page" coordinate system
if (context == "page") {
  left -= pageScrollX()
  top -= pageScrollY()
} else if (context == "local" || !context) {
  var localBox = cm.display.sizer.getBoundingClientRect()
  left += localBox.left
  top += localBox.top
}

var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect()
return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}

}

function charCoords(cm, pos, context, lineObj, bias) {

if (!lineObj) { lineObj = getLine(cm.doc, pos.line) }
return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)

}

// Returns a box for a given cursor position, which may have an // 'other' property containing the position of the secondary cursor // on a bidi boundary. function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {

lineObj = lineObj || getLine(cm.doc, pos.line)
if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
function get(ch, right) {
  var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight)
  if (right) { m.left = m.right; } else { m.right = m.left }
  return intoCoordSystem(cm, lineObj, m, context)
}
function getBidi(ch, partPos) {
  var part = order[partPos], right = part.level % 2
  if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
    part = order[--partPos]
    ch = bidiRight(part) - (part.level % 2 ? 0 : 1)
    right = true
  } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
    part = order[++partPos]
    ch = bidiLeft(part) - part.level % 2
    right = false
  }
  if (right && ch == part.to && ch > part.from) { return get(ch - 1) }
  return get(ch, right)
}
var order = getOrder(lineObj), ch = pos.ch
if (!order) { return get(ch) }
var partPos = getBidiPartAt(order, ch)
var val = getBidi(ch, partPos)
if (bidiOther != null) { val.other = getBidi(ch, bidiOther) }
return val

}

// Used to cheaply estimate the coordinates for a position. Used for // intermediate scroll updates. function estimateCoords(cm, pos) {

var left = 0
pos = clipPos(cm.doc, pos)
if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch }
var lineObj = getLine(cm.doc, pos.line)
var top = heightAtLine(lineObj) + paddingTop(cm.display)
return {left: left, right: left, top: top, bottom: top + lineObj.height}

}

// Positions returned by coordsChar contain some extra information. // xRel is the relative x position of the input coordinates compared // to the found position (so xRel > 0 means the coordinates are to // the right of the character position, for example). When outside // is true, that means the coordinates lie outside the line's // vertical range. function PosWithInfo(line, ch, outside, xRel) {

var pos = Pos(line, ch)
pos.xRel = xRel
if (outside) { pos.outside = true }
return pos

}

// Compute the character position closest to the given coordinates. // Input must be lineSpace-local (“div” coordinate system). function coordsChar(cm, x, y) {

var doc = cm.doc
y += cm.display.viewOffset
if (y < 0) { return PosWithInfo(doc.first, 0, true, -1) }
var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1
if (lineN > last)
  { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1) }
if (x < 0) { x = 0 }

var lineObj = getLine(doc, lineN)
for (;;) {
  var found = coordsCharInner(cm, lineObj, lineN, x, y)
  var merged = collapsedSpanAtEnd(lineObj)
  var mergedPos = merged && merged.find(0, true)
  if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
    { lineN = lineNo(lineObj = mergedPos.to.line) }
  else
    { return found }
}

}

function coordsCharInner(cm, lineObj, lineNo$$1, x, y) {

var innerOff = y - heightAtLine(lineObj)
var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth
var preparedMeasure = prepareMeasureForLine(cm, lineObj)

function getX(ch) {
  var sp = cursorCoords(cm, Pos(lineNo$$1, ch), "line", lineObj, preparedMeasure)
  wrongLine = true
  if (innerOff > sp.bottom) { return sp.left - adjust }
  else if (innerOff < sp.top) { return sp.left + adjust }
  else { wrongLine = false }
  return sp.left
}

var bidi = getOrder(lineObj), dist = lineObj.text.length
var from = lineLeft(lineObj), to = lineRight(lineObj)
var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine

if (x > toX) { return PosWithInfo(lineNo$$1, to, toOutside, 1) }
// Do a binary search between these bounds.
for (;;) {
  if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
    var ch = x < fromX || x - fromX <= toX - x ? from : to
    var outside = ch == from ? fromOutside : toOutside
    var xDiff = x - (ch == from ? fromX : toX)
    // This is a kludge to handle the case where the coordinates
    // are after a line-wrapped line. We should replace it with a
    // more general handling of cursor positions around line
    // breaks. (Issue #4078)
    if (toOutside && !bidi && !/\s/.test(lineObj.text.charAt(ch)) && xDiff > 0 &&
        ch < lineObj.text.length && preparedMeasure.view.measure.heights.length > 1) {
      var charSize = measureCharPrepared(cm, preparedMeasure, ch, "right")
      if (innerOff <= charSize.bottom && innerOff >= charSize.top && Math.abs(x - charSize.right) < xDiff) {
        outside = false
        ch++
        xDiff = x - charSize.right
      }
    }
    while (isExtendingChar(lineObj.text.charAt(ch))) { ++ch }
    var pos = PosWithInfo(lineNo$$1, ch, outside, xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0)
    return pos
  }
  var step = Math.ceil(dist / 2), middle = from + step
  if (bidi) {
    middle = from
    for (var i = 0; i < step; ++i) { middle = moveVisually(lineObj, middle, 1) }
  }
  var middleX = getX(middle)
  if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) { toX += 1000; } dist = step}
  else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step}
}

}

var measureText // Compute the default text height. function textHeight(display) {

if (display.cachedTextHeight != null) { return display.cachedTextHeight }
if (measureText == null) {
  measureText = elt("pre")
  // Measure a bunch of lines, for browsers that compute
  // fractional heights.
  for (var i = 0; i < 49; ++i) {
    measureText.appendChild(document.createTextNode("x"))
    measureText.appendChild(elt("br"))
  }
  measureText.appendChild(document.createTextNode("x"))
}
removeChildrenAndAdd(display.measure, measureText)
var height = measureText.offsetHeight / 50
if (height > 3) { display.cachedTextHeight = height }
removeChildren(display.measure)
return height || 1

}

// Compute the default character width. function charWidth(display) {

if (display.cachedCharWidth != null) { return display.cachedCharWidth }
var anchor = elt("span", "xxxxxxxxxx")
var pre = elt("pre", [anchor])
removeChildrenAndAdd(display.measure, pre)
var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10
if (width > 2) { display.cachedCharWidth = width }
return width || 10

}

// Do a bulk-read of the DOM positions and sizes needed to draw the // view, so that we don't interleave reading and writing to the DOM. function getDimensions(cm) {

var d = cm.display, left = {}, width = {}
var gutterLeft = d.gutters.clientLeft
for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
  left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft
  width[cm.options.gutters[i]] = n.clientWidth
}
return {fixedPos: compensateForHScroll(d),
        gutterTotalWidth: d.gutters.offsetWidth,
        gutterLeft: left,
        gutterWidth: width,
        wrapperWidth: d.wrapper.clientWidth}

}

// Computes display.scroller.scrollLeft + display.gutters.offsetWidth, // but using getBoundingClientRect to get a sub-pixel-accurate // result. function compensateForHScroll(display) {

return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left

}

// Returns a function that estimates the height of a line, to use as // first approximation until the line becomes visible (and is thus // properly measurable). function estimateHeight(cm) {

var th = textHeight(cm.display), wrapping = cm.options.lineWrapping
var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3)
return function (line) {
  if (lineIsHidden(cm.doc, line)) { return 0 }

  var widgetsHeight = 0
  if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
    if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height }
  } }

  if (wrapping)
    { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
  else
    { return widgetsHeight + th }
}

}

function estimateLineHeights(cm) {

var doc = cm.doc, est = estimateHeight(cm)
doc.iter(function (line) {
  var estHeight = est(line)
  if (estHeight != line.height) { updateLineHeight(line, estHeight) }
})

}

// Given a mouse event, find the corresponding position. If liberal // is false, it checks whether a gutter or scrollbar was clicked, // and returns null if it was. forRect is used by rectangular // selections, and tries to estimate a character position even for // coordinates beyond the right of the text. function posFromMouse(cm, e, liberal, forRect) {

var display = cm.display
if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }

var x, y, space = display.lineSpace.getBoundingClientRect()
// Fails unpredictably on IE[67] when mouse is dragged around quickly.
try { x = e.clientX - space.left; y = e.clientY - space.top }
catch (e) { return null }
var coords = coordsChar(cm, x, y), line
if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
  var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length
  coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))
}
return coords

}

// Find the view element corresponding to a given line. Return null // when the line isn't visible. function findViewIndex(cm, n) {

if (n >= cm.display.viewTo) { return null }
n -= cm.display.viewFrom
if (n < 0) { return null }
var view = cm.display.view
for (var i = 0; i < view.length; i++) {
  n -= view[i].size
  if (n < 0) { return i }
}

}

function updateSelection(cm) {

cm.display.input.showSelection(cm.display.input.prepareSelection())

}

function prepareSelection(cm, primary) {

var doc = cm.doc, result = {}
var curFragment = result.cursors = document.createDocumentFragment()
var selFragment = result.selection = document.createDocumentFragment()

for (var i = 0; i < doc.sel.ranges.length; i++) {
  if (primary === false && i == doc.sel.primIndex) { continue }
  var range$$1 = doc.sel.ranges[i]
  if (range$$1.from().line >= cm.display.viewTo || range$$1.to().line < cm.display.viewFrom) { continue }
  var collapsed = range$$1.empty()
  if (collapsed || cm.options.showCursorWhenSelecting)
    { drawSelectionCursor(cm, range$$1.head, curFragment) }
  if (!collapsed)
    { drawSelectionRange(cm, range$$1, selFragment) }
}
return result

}

// Draws a cursor for the given range function drawSelectionCursor(cm, head, output) {

var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)

var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
cursor.style.left = pos.left + "px"
cursor.style.top = pos.top + "px"
cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"

if (pos.other) {
  // Secondary cursor, shown when on a 'jump' in bi-directional text
  var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
  otherCursor.style.display = ""
  otherCursor.style.left = pos.other.left + "px"
  otherCursor.style.top = pos.other.top + "px"
  otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
}

}

// Draws the given range as a highlighted selection function drawSelectionRange(cm, range$$1, output) {

var display = cm.display, doc = cm.doc
var fragment = document.createDocumentFragment()
var padding = paddingH(cm.display), leftSide = padding.left
var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right

function add(left, top, width, bottom) {
  if (top < 0) { top = 0 }
  top = Math.round(top)
  bottom = Math.round(bottom)
  fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")))
}

function drawForLine(line, fromArg, toArg) {
  var lineObj = getLine(doc, line)
  var lineLen = lineObj.text.length
  var start, end
  function coords(ch, bias) {
    return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
  }

  iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir) {
    var leftPos = coords(from, "left"), rightPos, left, right
    if (from == to) {
      rightPos = leftPos
      left = right = leftPos.left
    } else {
      rightPos = coords(to - 1, "right")
      if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp }
      left = leftPos.left
      right = rightPos.right
    }
    if (fromArg == null && from == 0) { left = leftSide }
    if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
      add(left, leftPos.top, null, leftPos.bottom)
      left = leftSide
      if (leftPos.bottom < rightPos.top) { add(left, leftPos.bottom, null, rightPos.top) }
    }
    if (toArg == null && to == lineLen) { right = rightSide }
    if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
      { start = leftPos }
    if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
      { end = rightPos }
    if (left < leftSide + 1) { left = leftSide }
    add(left, rightPos.top, right - left, rightPos.bottom)
  })
  return {start: start, end: end}
}

var sFrom = range$$1.from(), sTo = range$$1.to()
if (sFrom.line == sTo.line) {
  drawForLine(sFrom.line, sFrom.ch, sTo.ch)
} else {
  var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
  var singleVLine = visualLine(fromLine) == visualLine(toLine)
  var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
  var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
  if (singleVLine) {
    if (leftEnd.top < rightStart.top - 2) {
      add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
      add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)
    } else {
      add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)
    }
  }
  if (leftEnd.bottom < rightStart.top)
    { add(leftSide, leftEnd.bottom, null, rightStart.top) }
}

output.appendChild(fragment)

}

// Cursor-blinking function restartBlink(cm) {

if (!cm.state.focused) { return }
var display = cm.display
clearInterval(display.blinker)
var on = true
display.cursorDiv.style.visibility = ""
if (cm.options.cursorBlinkRate > 0)
  { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
    cm.options.cursorBlinkRate) }
else if (cm.options.cursorBlinkRate < 0)
  { display.cursorDiv.style.visibility = "hidden" }

}

function ensureFocus(cm) {

if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm) }

}

function delayBlurEvent(cm) {

cm.state.delayingBlurEvent = true
setTimeout(function () { if (cm.state.delayingBlurEvent) {
  cm.state.delayingBlurEvent = false
  onBlur(cm)
} }, 100)

}

function onFocus(cm, e) {

if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false }

if (cm.options.readOnly == "nocursor") { return }
if (!cm.state.focused) {
  signal(cm, "focus", cm, e)
  cm.state.focused = true
  addClass(cm.display.wrapper, "CodeMirror-focused")
  // This test prevents this from firing when a context
  // menu is closed (since the input reset would kill the
  // select-all detection hack)
  if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
    cm.display.input.reset()
    if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20) } // Issue #1730
  }
  cm.display.input.receivedFocus()
}
restartBlink(cm)

} function onBlur(cm, e) {

if (cm.state.delayingBlurEvent) { return }

if (cm.state.focused) {
  signal(cm, "blur", cm, e)
  cm.state.focused = false
  rmClass(cm.display.wrapper, "CodeMirror-focused")
}
clearInterval(cm.display.blinker)
setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false } }, 150)

}

// Re-align line numbers and gutter marks to compensate for // horizontal scrolling. function alignHorizontally(cm) {

var display = cm.display, view = display.view
if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
var gutterW = display.gutters.offsetWidth, left = comp + "px"
for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
  if (cm.options.fixedGutter) {
    if (view[i].gutter)
      { view[i].gutter.style.left = left }
    if (view[i].gutterBackground)
      { view[i].gutterBackground.style.left = left }
  }
  var align = view[i].alignable
  if (align) { for (var j = 0; j < align.length; j++)
    { align[j].style.left = left } }
} }
if (cm.options.fixedGutter)
  { display.gutters.style.left = (comp + gutterW) + "px" }

}

// Used to ensure that the line number gutter is still the right // size for the current document size. Returns true when an update // is needed. function maybeUpdateLineNumberWidth(cm) {

if (!cm.options.lineNumbers) { return false }
var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
if (last.length != display.lineNumChars) {
  var test = display.measure.appendChild(elt("div", [elt("div", last)],
                                             "CodeMirror-linenumber CodeMirror-gutter-elt"))
  var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
  display.lineGutter.style.width = ""
  display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
  display.lineNumWidth = display.lineNumInnerWidth + padding
  display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
  display.lineGutter.style.width = display.lineNumWidth + "px"
  updateGutterSpace(cm)
  return true
}
return false

}

// Read the actual heights of the rendered lines, and update their // stored heights to match. function updateHeightsInViewport(cm) {

var display = cm.display
var prevBottom = display.lineDiv.offsetTop
for (var i = 0; i < display.view.length; i++) {
  var cur = display.view[i], height = void 0
  if (cur.hidden) { continue }
  if (ie && ie_version < 8) {
    var bot = cur.node.offsetTop + cur.node.offsetHeight
    height = bot - prevBottom
    prevBottom = bot
  } else {
    var box = cur.node.getBoundingClientRect()
    height = box.bottom - box.top
  }
  var diff = cur.line.height - height
  if (height < 2) { height = textHeight(display) }
  if (diff > .001 || diff < -.001) {
    updateLineHeight(cur.line, height)
    updateWidgetHeight(cur.line)
    if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
      { updateWidgetHeight(cur.rest[j]) } }
  }
}

}

// Read and store the height of line widgets associated with the // given line. function updateWidgetHeight(line) {

if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
  { line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight } }

}

// Compute the lines that are visible in a given viewport (defaults // the the current scroll position). viewport may contain top, // height, and ensure (see op.scrollToPos) properties. function visibleLines(display, doc, viewport) {

var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
top = Math.floor(top - paddingTop(display))
var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight

var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
// Ensure is a {from: {line, ch}, to: {line, ch}} object, and
// forces those lines into the viewport (if possible).
if (viewport && viewport.ensure) {
  var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
  if (ensureFrom < from) {
    from = ensureFrom
    to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
  } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
    from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
    to = ensureTo
  }
}
return {from: from, to: Math.max(to, from + 1)}

}

// Sync the scrollable area and scrollbars, ensure the viewport // covers the visible area. function setScrollTop(cm, val) {

if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
cm.doc.scrollTop = val
if (!gecko) { updateDisplaySimple(cm, {top: val}) }
if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val }
cm.display.scrollbars.setScrollTop(val)
if (gecko) { updateDisplaySimple(cm) }
startWorker(cm, 100)

} // Sync scroller and scrollbar, ensure the gutter elements are // aligned. function setScrollLeft(cm, val, isScroller) {

if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) { return }
val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth)
cm.doc.scrollLeft = val
alignHorizontally(cm)
if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val }
cm.display.scrollbars.setScrollLeft(val)

}

// Since the delta values reported on mouse wheel events are // unstandardized between browsers and even browser versions, and // generally horribly unpredictable, this code starts by measuring // the scroll effect that the first few mouse wheel events have, // and, from that, detects the way it can convert deltas to pixel // offsets afterwards. // // The reason we want to know the amount a wheel event will scroll // is that it gives us a chance to update the display before the // actual scrolling happens, reducing flickering.

var wheelSamples = 0; var wheelPixelsPerUnit = null // Fill in a browser-detected starting value on browsers where we // know one. These don't have to be accurate – the result of them // being wrong would just be a slight flicker on the first wheel // scroll (if it is large enough). if (ie) { wheelPixelsPerUnit = -.53 } else if (gecko) { wheelPixelsPerUnit = 15 } else if (chrome) { wheelPixelsPerUnit = -.7 } else if (safari) { wheelPixelsPerUnit = -1/3 }

function wheelEventDelta(e) {

var dx = e.wheelDeltaX, dy = e.wheelDeltaY
if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail }
if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail }
else if (dy == null) { dy = e.wheelDelta }
return {x: dx, y: dy}

} function wheelEventPixels(e) {

var delta = wheelEventDelta(e)
delta.x *= wheelPixelsPerUnit
delta.y *= wheelPixelsPerUnit
return delta

}

function onScrollWheel(cm, e) {

var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y

var display = cm.display, scroll = display.scroller
// Quit if there's nothing to scroll here
var canScrollX = scroll.scrollWidth > scroll.clientWidth
var canScrollY = scroll.scrollHeight > scroll.clientHeight
if (!(dx && canScrollX || dy && canScrollY)) { return }

// Webkit browsers on OS X abort momentum scrolls when the target
// of the scroll event is removed from the scrollable element.
// This hack (see related code in patchDisplay) makes sure the
// element is kept around.
if (dy && mac && webkit) {
  outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
    for (var i = 0; i < view.length; i++) {
      if (view[i].node == cur) {
        cm.display.currentWheelTarget = cur
        break outer
      }
    }
  }
}

// On some browsers, horizontal scrolling will cause redraws to
// happen before the gutter has been realigned, causing it to
// wriggle around in a most unseemly way. When we have an
// estimated pixels/delta value, we just handle horizontal
// scrolling entirely here. It'll be slightly off from native, but
// better than glitching out.
if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
  if (dy && canScrollY)
    { setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight))) }
  setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)))
  // Only prevent default scrolling if vertical scrolling is
  // actually possible. Otherwise, it causes vertical scroll
  // jitter on OSX trackpads when deltaX is small and deltaY
  // is large (issue #3579)
  if (!dy || (dy && canScrollY))
    { e_preventDefault(e) }
  display.wheelStartX = null // Abort measurement, if in progress
  return
}

// 'Project' the visible viewport to cover the area that is being
// scrolled into view (if we know enough to estimate it).
if (dy && wheelPixelsPerUnit != null) {
  var pixels = dy * wheelPixelsPerUnit
  var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight
  if (pixels < 0) { top = Math.max(0, top + pixels - 50) }
  else { bot = Math.min(cm.doc.height, bot + pixels + 50) }
  updateDisplaySimple(cm, {top: top, bottom: bot})
}

if (wheelSamples < 20) {
  if (display.wheelStartX == null) {
    display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop
    display.wheelDX = dx; display.wheelDY = dy
    setTimeout(function () {
      if (display.wheelStartX == null) { return }
      var movedX = scroll.scrollLeft - display.wheelStartX
      var movedY = scroll.scrollTop - display.wheelStartY
      var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
        (movedX && display.wheelDX && movedX / display.wheelDX)
      display.wheelStartX = display.wheelStartY = null
      if (!sample) { return }
      wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1)
      ++wheelSamples
    }, 200)
  } else {
    display.wheelDX += dx; display.wheelDY += dy
  }
}

}

// SCROLLBARS

// Prepare DOM reads needed to update the scrollbars. Done in one // shot to minimize update/measure roundtrips. function measureForScrollbars(cm) {

var d = cm.display, gutterW = d.gutters.offsetWidth
var docH = Math.round(cm.doc.height + paddingVert(cm.display))
return {
  clientHeight: d.scroller.clientHeight,
  viewHeight: d.wrapper.clientHeight,
  scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
  viewWidth: d.wrapper.clientWidth,
  barLeft: cm.options.fixedGutter ? gutterW : 0,
  docHeight: docH,
  scrollHeight: docH + scrollGap(cm) + d.barHeight,
  nativeBarWidth: d.nativeBarWidth,
  gutterWidth: gutterW
}

}

function NativeScrollbars(place, scroll, cm) {

this.cm = cm
var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar")
var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar")
place(vert); place(horiz)

on(vert, "scroll", function () {
  if (vert.clientHeight) { scroll(vert.scrollTop, "vertical") }
})
on(horiz, "scroll", function () {
  if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal") }
})

this.checkedZeroWidth = false
// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px" }

}

NativeScrollbars.prototype = copyObj({

update: function(measure) {
  var needsH = measure.scrollWidth > measure.clientWidth + 1
  var needsV = measure.scrollHeight > measure.clientHeight + 1
  var sWidth = measure.nativeBarWidth

  if (needsV) {
    this.vert.style.display = "block"
    this.vert.style.bottom = needsH ? sWidth + "px" : "0"
    var totalHeight = measure.viewHeight - (needsH ? sWidth : 0)
    // A bug in IE8 can cause this value to be negative, so guard it.
    this.vert.firstChild.style.height =
      Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"
  } else {
    this.vert.style.display = ""
    this.vert.firstChild.style.height = "0"
  }

  if (needsH) {
    this.horiz.style.display = "block"
    this.horiz.style.right = needsV ? sWidth + "px" : "0"
    this.horiz.style.left = measure.barLeft + "px"
    var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0)
    this.horiz.firstChild.style.width =
      (measure.scrollWidth - measure.clientWidth + totalWidth) + "px"
  } else {
    this.horiz.style.display = ""
    this.horiz.firstChild.style.width = "0"
  }

  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
    if (sWidth == 0) { this.zeroWidthHack() }
    this.checkedZeroWidth = true
  }

  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
},
setScrollLeft: function(pos) {
  if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos }
  if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz) }
},
setScrollTop: function(pos) {
  if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos }
  if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert) }
},
zeroWidthHack: function() {
  var w = mac && !mac_geMountainLion ? "12px" : "18px"
  this.horiz.style.height = this.vert.style.width = w
  this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"
  this.disableHoriz = new Delayed
  this.disableVert = new Delayed
},
enableZeroWidthBar: function(bar, delay) {
  bar.style.pointerEvents = "auto"
  function maybeDisable() {
    // To find out whether the scrollbar is still visible, we
    // check whether the element under the pixel in the bottom
    // left corner of the scrollbar box is the scrollbar box
    // itself (when the bar is still visible) or its filler child
    // (when the bar is hidden). If it is still visible, we keep
    // it enabled, if it's hidden, we disable pointer events.
    var box = bar.getBoundingClientRect()
    var elt$$1 = document.elementFromPoint(box.left + 1, box.bottom - 1)
    if (elt$$1 != bar) { bar.style.pointerEvents = "none" }
    else { delay.set(1000, maybeDisable) }
  }
  delay.set(1000, maybeDisable)
},
clear: function() {
  var parent = this.horiz.parentNode
  parent.removeChild(this.horiz)
  parent.removeChild(this.vert)
}

}, NativeScrollbars.prototype)

function NullScrollbars() {}

NullScrollbars.prototype = copyObj({

update: function() { return {bottom: 0, right: 0} },
setScrollLeft: function() {},
setScrollTop: function() {},
clear: function() {}

}, NullScrollbars.prototype)

function updateScrollbars(cm, measure) {

if (!measure) { measure = measureForScrollbars(cm) }
var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight
updateScrollbarsInner(cm, measure)
for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
  if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
    { updateHeightsInViewport(cm) }
  updateScrollbarsInner(cm, measureForScrollbars(cm))
  startWidth = cm.display.barWidth; startHeight = cm.display.barHeight
}

}

// Re-synchronize the fake scrollbars with the actual size of the // content. function updateScrollbarsInner(cm, measure) {

var d = cm.display
var sizes = d.scrollbars.update(measure)

d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"
d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"
d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"

if (sizes.right && sizes.bottom) {
  d.scrollbarFiller.style.display = "block"
  d.scrollbarFiller.style.height = sizes.bottom + "px"
  d.scrollbarFiller.style.width = sizes.right + "px"
} else { d.scrollbarFiller.style.display = "" }
if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
  d.gutterFiller.style.display = "block"
  d.gutterFiller.style.height = sizes.bottom + "px"
  d.gutterFiller.style.width = measure.gutterWidth + "px"
} else { d.gutterFiller.style.display = "" }

}

var scrollbarModel = {“native”: NativeScrollbars, “null”: NullScrollbars}

function initScrollbars(cm) {

if (cm.display.scrollbars) {
  cm.display.scrollbars.clear()
  if (cm.display.scrollbars.addClass)
    { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
}

cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
  cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller)
  // Prevent clicks in the scrollbars from killing focus
  on(node, "mousedown", function () {
    if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0) }
  })
  node.setAttribute("cm-not-content", "true")
}, function (pos, axis) {
  if (axis == "horizontal") { setScrollLeft(cm, pos) }
  else { setScrollTop(cm, pos) }
}, cm)
if (cm.display.scrollbars.addClass)
  { addClass(cm.display.wrapper, cm.display.scrollbars.addClass) }

}

// SCROLLING THINGS INTO VIEW

// If an editor sits on the top or bottom of the window, partially // scrolled out of view, this ensures that the cursor is visible. function maybeScrollWindow(cm, coords) {

if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }

var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null
if (coords.top + box.top < 0) { doScroll = true }
else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false }
if (doScroll != null && !phantom) {
  var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (coords.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (coords.bottom - coords.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (coords.left) + "px; width: 2px;"))
  cm.display.lineSpace.appendChild(scrollNode)
  scrollNode.scrollIntoView(doScroll)
  cm.display.lineSpace.removeChild(scrollNode)
}

}

// Scroll a given position into view (immediately), verifying that // it actually became visible (as line heights are accurately // measured, the position of something may 'drift' during drawing). function scrollPosIntoView(cm, pos, end, margin) {

if (margin == null) { margin = 0 }
var coords
for (var limit = 0; limit < 5; limit++) {
  var changed = false
  coords = cursorCoords(cm, pos)
  var endCoords = !end || end == pos ? coords : cursorCoords(cm, end)
  var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
                                     Math.min(coords.top, endCoords.top) - margin,
                                     Math.max(coords.left, endCoords.left),
                                     Math.max(coords.bottom, endCoords.bottom) + margin)
  var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft
  if (scrollPos.scrollTop != null) {
    setScrollTop(cm, scrollPos.scrollTop)
    if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true }
  }
  if (scrollPos.scrollLeft != null) {
    setScrollLeft(cm, scrollPos.scrollLeft)
    if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true }
  }
  if (!changed) { break }
}
return coords

}

// Scroll a given set of coordinates into view (immediately). function scrollIntoView(cm, x1, y1, x2, y2) {

var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2)
if (scrollPos.scrollTop != null) { setScrollTop(cm, scrollPos.scrollTop) }
if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft) }

}

// Calculate a new scroll position needed to scroll the given // rectangle into view. Returns an object with scrollTop and // scrollLeft properties. When these are undefined, the // vertical/horizontal position does not need to be adjusted. function calculateScrollPos(cm, x1, y1, x2, y2) {

var display = cm.display, snapMargin = textHeight(cm.display)
if (y1 < 0) { y1 = 0 }
var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop
var screen = displayHeight(cm), result = {}
if (y2 - y1 > screen) { y2 = y1 + screen }
var docBottom = cm.doc.height + paddingVert(display)
var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin
if (y1 < screentop) {
  result.scrollTop = atTop ? 0 : y1
} else if (y2 > screentop + screen) {
  var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen)
  if (newTop != screentop) { result.scrollTop = newTop }
}

var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft
var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0)
var tooWide = x2 - x1 > screenw
if (tooWide) { x2 = x1 + screenw }
if (x1 < 10)
  { result.scrollLeft = 0 }
else if (x1 < screenleft)
  { result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10)) }
else if (x2 > screenw + screenleft - 3)
  { result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw }
return result

}

// Store a relative adjustment to the scroll position in the current // operation (to be applied when the operation finishes). function addToScrollPos(cm, left, top) {

if (left != null || top != null) { resolveScrollToPos(cm) }
if (left != null)
  { cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left }
if (top != null)
  { cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top }

}

// Make sure that at the end of the operation the current cursor is // shown. function ensureCursorVisible(cm) {

resolveScrollToPos(cm)
var cur = cm.getCursor(), from = cur, to = cur
if (!cm.options.lineWrapping) {
  from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur
  to = Pos(cur.line, cur.ch + 1)
}
cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true}

}

// When an operation has its scrollToPos property set, and another // scroll action is applied before the end of the operation, this // 'simulates' scrolling that position into view in a cheap way, so // that the effect of intermediate scroll commands is not ignored. function resolveScrollToPos(cm) {

var range$$1 = cm.curOp.scrollToPos
if (range$$1) {
  cm.curOp.scrollToPos = null
  var from = estimateCoords(cm, range$$1.from), to = estimateCoords(cm, range$$1.to)
  var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
                                Math.min(from.top, to.top) - range$$1.margin,
                                Math.max(from.right, to.right),
                                Math.max(from.bottom, to.bottom) + range$$1.margin)
  cm.scrollTo(sPos.scrollLeft, sPos.scrollTop)
}

}

// Operations are used to wrap a series of changes to the editor // state in such a way that each change won't have to update the // cursor and display (which would be awkward, slow, and // error-prone). Instead, display updates are batched and then all // combined and executed at once.

var nextOpId = 0 // Start a new operation. function startOperation(cm) {

cm.curOp = {
  cm: cm,
  viewChanged: false,      // Flag that indicates that lines might need to be redrawn
  startHeight: cm.doc.height, // Used to detect need to update scrollbar
  forceUpdate: false,      // Used to force a redraw
  updateInput: null,       // Whether to reset the input textarea
  typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
  changeObjs: null,        // Accumulated changes, for firing change events
  cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
  cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
  selectionChanged: false, // Whether the selection needs to be redrawn
  updateMaxLine: false,    // Set when the widest line needs to be determined anew
  scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
  scrollToPos: null,       // Used to scroll to a specific position
  focus: false,
  id: ++nextOpId           // Unique ID
}
pushOperation(cm.curOp)

}

// Finish an operation, updating the display and signalling delayed events function endOperation(cm) {

var op = cm.curOp
finishOperation(op, function (group) {
  for (var i = 0; i < group.ops.length; i++)
    { group.ops[i].cm.curOp = null }
  endOperations(group)
})

}

// The DOM updates done when an operation finishes are batched so // that the minimum number of relayouts are required. function endOperations(group) {

var ops = group.ops
for (var i = 0; i < ops.length; i++) // Read DOM
  { endOperation_R1(ops[i]) }
for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
  { endOperation_W1(ops[i$1]) }
for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
  { endOperation_R2(ops[i$2]) }
for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
  { endOperation_W2(ops[i$3]) }
for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
  { endOperation_finish(ops[i$4]) }

}

function endOperation_R1(op) {

var cm = op.cm, display = cm.display
maybeClipScrollbars(cm)
if (op.updateMaxLine) { findMaxLine(cm) }

op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
  op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
                     op.scrollToPos.to.line >= display.viewTo) ||
  display.maxLineChanged && cm.options.lineWrapping
op.update = op.mustUpdate &&
  new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate)

}

function endOperation_W1(op) {

op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update)

}

function endOperation_R2(op) {

var cm = op.cm, display = cm.display
if (op.updatedDisplay) { updateHeightsInViewport(cm) }

op.barMeasure = measureForScrollbars(cm)

// If the max line changed since it was last measured, measure it,
// and ensure the document's width matches it.
// updateDisplay_W2 will use these properties to do the actual resizing
if (display.maxLineChanged && !cm.options.lineWrapping) {
  op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3
  cm.display.sizerWidth = op.adjustWidthTo
  op.barMeasure.scrollWidth =
    Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth)
  op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm))
}

if (op.updatedDisplay || op.selectionChanged)
  { op.preparedSelection = display.input.prepareSelection(op.focus) }

}

function endOperation_W2(op) {

var cm = op.cm

if (op.adjustWidthTo != null) {
  cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"
  if (op.maxScrollLeft < cm.doc.scrollLeft)
    { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true) }
  cm.display.maxLineChanged = false
}

var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
if (op.preparedSelection)
  { cm.display.input.showSelection(op.preparedSelection, takeFocus) }
if (op.updatedDisplay || op.startHeight != cm.doc.height)
  { updateScrollbars(cm, op.barMeasure) }
if (op.updatedDisplay)
  { setDocumentHeight(cm, op.barMeasure) }

if (op.selectionChanged) { restartBlink(cm) }

if (cm.state.focused && op.updateInput)
  { cm.display.input.reset(op.typing) }
if (takeFocus) { ensureFocus(op.cm) }

}

function endOperation_finish(op) {

var cm = op.cm, display = cm.display, doc = cm.doc

if (op.updatedDisplay) { postUpdateDisplay(cm, op.update) }

// Abort mouse wheel delta measurement, when scrolling explicitly
if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
  { display.wheelStartX = display.wheelStartY = null }

// Propagate the scroll position to the actual DOM scroller
if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) {
  doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop))
  display.scrollbars.setScrollTop(doc.scrollTop)
  display.scroller.scrollTop = doc.scrollTop
}
if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) {
  doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft))
  display.scrollbars.setScrollLeft(doc.scrollLeft)
  display.scroller.scrollLeft = doc.scrollLeft
  alignHorizontally(cm)
}
// If we need to scroll a specific position into view, do so.
if (op.scrollToPos) {
  var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
                                 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin)
  if (op.scrollToPos.isCursor && cm.state.focused) { maybeScrollWindow(cm, coords) }
}

// Fire events for markers that are hidden/unidden by editing or
// undoing
var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers
if (hidden) { for (var i = 0; i < hidden.length; ++i)
  { if (!hidden[i].lines.length) { signal(hidden[i], "hide") } } }
if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
  { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide") } } }

if (display.wrapper.offsetHeight)
  { doc.scrollTop = cm.display.scroller.scrollTop }

// Fire change events, and delayed event handlers
if (op.changeObjs)
  { signal(cm, "changes", cm, op.changeObjs) }
if (op.update)
  { op.update.finish() }

}

// Run the given function in an operation function runInOp(cm, f) {

if (cm.curOp) { return f() }
startOperation(cm)
try { return f() }
finally { endOperation(cm) }

} // Wraps a function in an operation. Returns the wrapped function. function operation(cm, f) {

return function() {
  if (cm.curOp) { return f.apply(cm, arguments) }
  startOperation(cm)
  try { return f.apply(cm, arguments) }
  finally { endOperation(cm) }
}

} // Used to add methods to editor and doc instances, wrapping them in // operations. function methodOp(f) {

return function() {
  if (this.curOp) { return f.apply(this, arguments) }
  startOperation(this)
  try { return f.apply(this, arguments) }
  finally { endOperation(this) }
}

} function docMethodOp(f) {

return function() {
  var cm = this.cm
  if (!cm || cm.curOp) { return f.apply(this, arguments) }
  startOperation(cm)
  try { return f.apply(this, arguments) }
  finally { endOperation(cm) }
}

}

// Updates the display.view data structure for a given change to the // document. From and to are in pre-change coordinates. Lendiff is // the amount of lines added or subtracted by the change. This is // used for changes that span multiple lines, or change the way // lines are divided into visual lines. regLineChange (below) // registers single-line changes. function regChange(cm, from, to, lendiff) {

if (from == null) { from = cm.doc.first }
if (to == null) { to = cm.doc.first + cm.doc.size }
if (!lendiff) { lendiff = 0 }

var display = cm.display
if (lendiff && to < display.viewTo &&
    (display.updateLineNumbers == null || display.updateLineNumbers > from))
  { display.updateLineNumbers = from }

cm.curOp.viewChanged = true

if (from >= display.viewTo) { // Change after
  if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
    { resetView(cm) }
} else if (to <= display.viewFrom) { // Change before
  if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
    resetView(cm)
  } else {
    display.viewFrom += lendiff
    display.viewTo += lendiff
  }
} else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
  resetView(cm)
} else if (from <= display.viewFrom) { // Top overlap
  var cut = viewCuttingPoint(cm, to, to + lendiff, 1)
  if (cut) {
    display.view = display.view.slice(cut.index)
    display.viewFrom = cut.lineN
    display.viewTo += lendiff
  } else {
    resetView(cm)
  }
} else if (to >= display.viewTo) { // Bottom overlap
  var cut$1 = viewCuttingPoint(cm, from, from, -1)
  if (cut$1) {
    display.view = display.view.slice(0, cut$1.index)
    display.viewTo = cut$1.lineN
  } else {
    resetView(cm)
  }
} else { // Gap in the middle
  var cutTop = viewCuttingPoint(cm, from, from, -1)
  var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1)
  if (cutTop && cutBot) {
    display.view = display.view.slice(0, cutTop.index)
      .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
      .concat(display.view.slice(cutBot.index))
    display.viewTo += lendiff
  } else {
    resetView(cm)
  }
}

var ext = display.externalMeasured
if (ext) {
  if (to < ext.lineN)
    { ext.lineN += lendiff }
  else if (from < ext.lineN + ext.size)
    { display.externalMeasured = null }
}

}

// Register a change to a single line. Type must be one of “text”, // “gutter”, “class”, “widget” function regLineChange(cm, line, type) {

cm.curOp.viewChanged = true
var display = cm.display, ext = cm.display.externalMeasured
if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
  { display.externalMeasured = null }

if (line < display.viewFrom || line >= display.viewTo) { return }
var lineView = display.view[findViewIndex(cm, line)]
if (lineView.node == null) { return }
var arr = lineView.changes || (lineView.changes = [])
if (indexOf(arr, type) == -1) { arr.push(type) }

}

// Clear the view. function resetView(cm) {

cm.display.viewFrom = cm.display.viewTo = cm.doc.first
cm.display.view = []
cm.display.viewOffset = 0

}

function viewCuttingPoint(cm, oldN, newN, dir) {

var index = findViewIndex(cm, oldN), diff, view = cm.display.view
if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
  { return {index: index, lineN: newN} }
var n = cm.display.viewFrom
for (var i = 0; i < index; i++)
  { n += view[i].size }
if (n != oldN) {
  if (dir > 0) {
    if (index == view.length - 1) { return null }
    diff = (n + view[index].size) - oldN
    index++
  } else {
    diff = n - oldN
  }
  oldN += diff; newN += diff
}
while (visualLineNo(cm.doc, newN) != newN) {
  if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
  newN += dir * view[index - (dir < 0 ? 1 : 0)].size
  index += dir
}
return {index: index, lineN: newN}

}

// Force the view to cover a given range, adding empty view element // or clipping off existing ones as needed. function adjustView(cm, from, to) {

var display = cm.display, view = display.view
if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
  display.view = buildViewArray(cm, from, to)
  display.viewFrom = from
} else {
  if (display.viewFrom > from)
    { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view) }
  else if (display.viewFrom < from)
    { display.view = display.view.slice(findViewIndex(cm, from)) }
  display.viewFrom = from
  if (display.viewTo < to)
    { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)) }
  else if (display.viewTo > to)
    { display.view = display.view.slice(0, findViewIndex(cm, to)) }
}
display.viewTo = to

}

// Count the number of lines in the view whose DOM representation is // out of date (or nonexistent). function countDirtyView(cm) {

var view = cm.display.view, dirty = 0
for (var i = 0; i < view.length; i++) {
  var lineView = view[i]
  if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty }
}
return dirty

}

// HIGHLIGHT WORKER

function startWorker(cm, time) {

if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
  { cm.state.highlight.set(time, bind(highlightWorker, cm)) }

}

function highlightWorker(cm) {

var doc = cm.doc
if (doc.frontier < doc.first) { doc.frontier = doc.first }
if (doc.frontier >= cm.display.viewTo) { return }
var end = +new Date + cm.options.workTime
var state = copyState(doc.mode, getStateBefore(cm, doc.frontier))
var changedLines = []

doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
  if (doc.frontier >= cm.display.viewFrom) { // Visible
    var oldStyles = line.styles, tooLong = line.text.length > cm.options.maxHighlightLength
    var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true)
    line.styles = highlighted.styles
    var oldCls = line.styleClasses, newCls = highlighted.classes
    if (newCls) { line.styleClasses = newCls }
    else if (oldCls) { line.styleClasses = null }
    var ischange = !oldStyles || oldStyles.length != line.styles.length ||
      oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
    for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i] }
    if (ischange) { changedLines.push(doc.frontier) }
    line.stateAfter = tooLong ? state : copyState(doc.mode, state)
  } else {
    if (line.text.length <= cm.options.maxHighlightLength)
      { processLine(cm, line.text, state) }
    line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null
  }
  ++doc.frontier
  if (+new Date > end) {
    startWorker(cm, cm.options.workDelay)
    return true
  }
})
if (changedLines.length) { runInOp(cm, function () {
  for (var i = 0; i < changedLines.length; i++)
    { regLineChange(cm, changedLines[i], "text") }
}) }

}

// DISPLAY DRAWING

function DisplayUpdate(cm, viewport, force) {

var display = cm.display

this.viewport = viewport
// Store some values that we'll need later (but don't want to force a relayout for)
this.visible = visibleLines(display, cm.doc, viewport)
this.editorIsHidden = !display.wrapper.offsetWidth
this.wrapperHeight = display.wrapper.clientHeight
this.wrapperWidth = display.wrapper.clientWidth
this.oldDisplayWidth = displayWidth(cm)
this.force = force
this.dims = getDimensions(cm)
this.events = []

}

DisplayUpdate.prototype.signal = function(emitter, type) {

if (hasHandler(emitter, type))
  { this.events.push(arguments) }

} DisplayUpdate.prototype.finish = function() {

var this$1 = this;

for (var i = 0; i < this.events.length; i++)
  { signal.apply(null, this$1.events[i]) }

}

function maybeClipScrollbars(cm) {

var display = cm.display
if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
  display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth
  display.heightForcer.style.height = scrollGap(cm) + "px"
  display.sizer.style.marginBottom = -display.nativeBarWidth + "px"
  display.sizer.style.borderRightWidth = scrollGap(cm) + "px"
  display.scrollbarsClipped = true
}

}

// Does the actual updating of the line display. Bails out // (returning false) when there is nothing to be done and forced is // false. function updateDisplayIfNeeded(cm, update) {

var display = cm.display, doc = cm.doc

if (update.editorIsHidden) {
  resetView(cm)
  return false
}

// Bail out if the visible area is already rendered and nothing changed.
if (!update.force &&
    update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
    (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
    display.renderedView == display.view && countDirtyView(cm) == 0)
  { return false }

if (maybeUpdateLineNumberWidth(cm)) {
  resetView(cm)
  update.dims = getDimensions(cm)
}

// Compute a suitable new viewport (from & to)
var end = doc.first + doc.size
var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first)
var to = Math.min(end, update.visible.to + cm.options.viewportMargin)
if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom) }
if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo) }
if (sawCollapsedSpans) {
  from = visualLineNo(cm.doc, from)
  to = visualLineEndNo(cm.doc, to)
}

var different = from != display.viewFrom || to != display.viewTo ||
  display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth
adjustView(cm, from, to)

display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom))
// Position the mover div to align with the current scroll position
cm.display.mover.style.top = display.viewOffset + "px"

var toUpdate = countDirtyView(cm)
if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
    (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
  { return false }

// For big changes, we hide the enclosing element during the
// update, since that speeds up the operations on most browsers.
var focused = activeElt()
if (toUpdate > 4) { display.lineDiv.style.display = "none" }
patchDisplay(cm, display.updateLineNumbers, update.dims)
if (toUpdate > 4) { display.lineDiv.style.display = "" }
display.renderedView = display.view
// There might have been a widget with a focused element that got
// hidden or updated, if so re-focus it.
if (focused && activeElt() != focused && focused.offsetHeight) { focused.focus() }

// Prevent selection and cursors from interfering with the scroll
// width and height.
removeChildren(display.cursorDiv)
removeChildren(display.selectionDiv)
display.gutters.style.height = display.sizer.style.minHeight = 0

if (different) {
  display.lastWrapHeight = update.wrapperHeight
  display.lastWrapWidth = update.wrapperWidth
  startWorker(cm, 400)
}

display.updateLineNumbers = null

return true

}

function postUpdateDisplay(cm, update) {

var viewport = update.viewport

for (var first = true;; first = false) {
  if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
    // Clip forced viewport to actual scrollable area.
    if (viewport && viewport.top != null)
      { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)} }
    // Updated line heights might result in the drawn area not
    // actually covering the viewport. Keep looping until it does.
    update.visible = visibleLines(cm.display, cm.doc, viewport)
    if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
      { break }
  }
  if (!updateDisplayIfNeeded(cm, update)) { break }
  updateHeightsInViewport(cm)
  var barMeasure = measureForScrollbars(cm)
  updateSelection(cm)
  updateScrollbars(cm, barMeasure)
  setDocumentHeight(cm, barMeasure)
}

update.signal(cm, "update", cm)
if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
  update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo)
  cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo
}

}

function updateDisplaySimple(cm, viewport) {

var update = new DisplayUpdate(cm, viewport)
if (updateDisplayIfNeeded(cm, update)) {
  updateHeightsInViewport(cm)
  postUpdateDisplay(cm, update)
  var barMeasure = measureForScrollbars(cm)
  updateSelection(cm)
  updateScrollbars(cm, barMeasure)
  setDocumentHeight(cm, barMeasure)
  update.finish()
}

}

// Sync the actual display DOM structure with display.view, removing // nodes for lines that are no longer in view, and creating the ones // that are not there yet, and updating the ones that are out of // date. function patchDisplay(cm, updateNumbersFrom, dims) {

var display = cm.display, lineNumbers = cm.options.lineNumbers
var container = display.lineDiv, cur = container.firstChild

function rm(node) {
  var next = node.nextSibling
  // Works around a throw-scroll bug in OS X Webkit
  if (webkit && mac && cm.display.currentWheelTarget == node)
    { node.style.display = "none" }
  else
    { node.parentNode.removeChild(node) }
  return next
}

var view = display.view, lineN = display.viewFrom
// Loop over the elements in the view, syncing cur (the DOM nodes
// in display.lineDiv) with the view as we go.
for (var i = 0; i < view.length; i++) {
  var lineView = view[i]
  if (lineView.hidden) {
  } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
    var node = buildLineElement(cm, lineView, lineN, dims)
    container.insertBefore(node, cur)
  } else { // Already drawn
    while (cur != lineView.node) { cur = rm(cur) }
    var updateNumber = lineNumbers && updateNumbersFrom != null &&
      updateNumbersFrom <= lineN && lineView.lineNumber
    if (lineView.changes) {
      if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false }
      updateLineForChanges(cm, lineView, lineN, dims)
    }
    if (updateNumber) {
      removeChildren(lineView.lineNumber)
      lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)))
    }
    cur = lineView.node.nextSibling
  }
  lineN += lineView.size
}
while (cur) { cur = rm(cur) }

}

function updateGutterSpace(cm) {

var width = cm.display.gutters.offsetWidth
cm.display.sizer.style.marginLeft = width + "px"

}

function setDocumentHeight(cm, measure) {

cm.display.sizer.style.minHeight = measure.docHeight + "px"
cm.display.heightForcer.style.top = measure.docHeight + "px"
cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"

}

// Rebuild the gutter elements, ensure the margin to the left of the // code matches their width. function updateGutters(cm) {

var gutters = cm.display.gutters, specs = cm.options.gutters
removeChildren(gutters)
var i = 0
for (; i < specs.length; ++i) {
  var gutterClass = specs[i]
  var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass))
  if (gutterClass == "CodeMirror-linenumbers") {
    cm.display.lineGutter = gElt
    gElt.style.width = (cm.display.lineNumWidth || 1) + "px"
  }
}
gutters.style.display = i ? "" : "none"
updateGutterSpace(cm)

}

// Make sure the gutters options contains the element // “CodeMirror-linenumbers” when the lineNumbers option is true. function setGuttersForLineNumbers(options) {

var found = indexOf(options.gutters, "CodeMirror-linenumbers")
if (found == -1 && options.lineNumbers) {
  options.gutters = options.gutters.concat(["CodeMirror-linenumbers"])
} else if (found > -1 && !options.lineNumbers) {
  options.gutters = options.gutters.slice(0)
  options.gutters.splice(found, 1)
}

}

// Selection objects are immutable. A new one is created every time // the selection changes. A selection is one or more non-overlapping // (and non-touching) ranges, sorted, and an integer that indicates // which one is the primary selection (the one that's scrolled into // view, that getCursor returns, etc). function Selection(ranges, primIndex) {

this.ranges = ranges
this.primIndex = primIndex

}

Selection.prototype = {

primary: function() { return this.ranges[this.primIndex] },
equals: function(other) {
  var this$1 = this;

  if (other == this) { return true }
  if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
  for (var i = 0; i < this.ranges.length; i++) {
    var here = this$1.ranges[i], there = other.ranges[i]
    if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) { return false }
  }
  return true
},
deepCopy: function() {
  var this$1 = this;

  var out = []
  for (var i = 0; i < this.ranges.length; i++)
    { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)) }
  return new Selection(out, this.primIndex)
},
somethingSelected: function() {
  var this$1 = this;

  for (var i = 0; i < this.ranges.length; i++)
    { if (!this$1.ranges[i].empty()) { return true } }
  return false
},
contains: function(pos, end) {
  var this$1 = this;

  if (!end) { end = pos }
  for (var i = 0; i < this.ranges.length; i++) {
    var range = this$1.ranges[i]
    if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
      { return i }
  }
  return -1
}

}

function Range(anchor, head) {

this.anchor = anchor; this.head = head

}

Range.prototype = {

from: function() { return minPos(this.anchor, this.head) },
to: function() { return maxPos(this.anchor, this.head) },
empty: function() {
  return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch
}

}

// Take an unsorted, potentially overlapping set of ranges, and // build a selection out of it. 'Consumes' ranges array (modifying // it). function normalizeSelection(ranges, primIndex) {

var prim = ranges[primIndex]
ranges.sort(function (a, b) { return cmp(a.from(), b.from()); })
primIndex = indexOf(ranges, prim)
for (var i = 1; i < ranges.length; i++) {
  var cur = ranges[i], prev = ranges[i - 1]
  if (cmp(prev.to(), cur.from()) >= 0) {
    var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to())
    var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head
    if (i <= primIndex) { --primIndex }
    ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to))
  }
}
return new Selection(ranges, primIndex)

}

function simpleSelection(anchor, head) {

return new Selection([new Range(anchor, head || anchor)], 0)

}

// Compute the position of the end of a change (its 'to' property // refers to the pre-change end). function changeEnd(change) {

if (!change.text) { return change.to }
return Pos(change.from.line + change.text.length - 1,
           lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))

}

// Adjust a position to refer to the post-change position of the // same text, or the end of the change if the change covers it. function adjustForChange(pos, change) {

if (cmp(pos, change.from) < 0) { return pos }
if (cmp(pos, change.to) <= 0) { return changeEnd(change) }

var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch
if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch }
return Pos(line, ch)

}

function computeSelAfterChange(doc, change) {

var out = []
for (var i = 0; i < doc.sel.ranges.length; i++) {
  var range = doc.sel.ranges[i]
  out.push(new Range(adjustForChange(range.anchor, change),
                     adjustForChange(range.head, change)))
}
return normalizeSelection(out, doc.sel.primIndex)

}

function offsetPos(pos, old, nw) {

if (pos.line == old.line)
  { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
else
  { return Pos(nw.line + (pos.line - old.line), pos.ch) }

}

// Used by replaceSelections to allow moving the selection to the // start or around the replaced test. Hint may be “start” or “around”. function computeReplacedSel(doc, changes, hint) {

var out = []
var oldPrev = Pos(doc.first, 0), newPrev = oldPrev
for (var i = 0; i < changes.length; i++) {
  var change = changes[i]
  var from = offsetPos(change.from, oldPrev, newPrev)
  var to = offsetPos(changeEnd(change), oldPrev, newPrev)
  oldPrev = change.to
  newPrev = to
  if (hint == "around") {
    var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0
    out[i] = new Range(inv ? to : from, inv ? from : to)
  } else {
    out[i] = new Range(from, from)
  }
}
return new Selection(out, doc.sel.primIndex)

}

// Used to get the editor into a consistent state again when options change.

function loadMode(cm) {

cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
resetModeState(cm)

}

function resetModeState(cm) {

cm.doc.iter(function (line) {
  if (line.stateAfter) { line.stateAfter = null }
  if (line.styles) { line.styles = null }
})
cm.doc.frontier = cm.doc.first
startWorker(cm, 100)
cm.state.modeGen++
if (cm.curOp) { regChange(cm) }

}

// DOCUMENT DATA STRUCTURE

// By default, updates that start and end at the beginning of a line // are treated specially, in order to make the association of line // widgets and marker elements with the text behave more intuitive. function isWholeLineUpdate(doc, change) {

return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
  (!doc.cm || doc.cm.options.wholeLineUpdateBefore)

}

// Perform a change on the document data structure. function updateDoc(doc, change, markedSpans, estimateHeight$$1) {

function spansFor(n) {return markedSpans ? markedSpans[n] : null}
function update(line, text, spans) {
  updateLine(line, text, spans, estimateHeight$$1)
  signalLater(line, "change", line, change)
}
function linesFor(start, end) {
  var result = []
  for (var i = start; i < end; ++i)
    { result.push(new Line(text[i], spansFor(i), estimateHeight$$1)) }
  return result
}

var from = change.from, to = change.to, text = change.text
var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line

// Adjust the line structure
if (change.full) {
  doc.insert(0, linesFor(0, text.length))
  doc.remove(text.length, doc.size - text.length)
} else if (isWholeLineUpdate(doc, change)) {
  // This is a whole-line replace. Treated specially to make
  // sure line objects move the way they are supposed to.
  var added = linesFor(0, text.length - 1)
  update(lastLine, lastLine.text, lastSpans)
  if (nlines) { doc.remove(from.line, nlines) }
  if (added.length) { doc.insert(from.line, added) }
} else if (firstLine == lastLine) {
  if (text.length == 1) {
    update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
  } else {
    var added$1 = linesFor(1, text.length - 1)
    added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight$$1))
    update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
    doc.insert(from.line + 1, added$1)
  }
} else if (text.length == 1) {
  update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
  doc.remove(from.line + 1, nlines)
} else {
  update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
  update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
  var added$2 = linesFor(1, text.length - 1)
  if (nlines > 1) { doc.remove(from.line + 1, nlines - 1) }
  doc.insert(from.line + 1, added$2)
}

signalLater(doc, "change", doc, change)

}

// Call f for all linked documents. function linkedDocs(doc, f, sharedHistOnly) {

function propagate(doc, skip, sharedHist) {
  if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
    var rel = doc.linked[i]
    if (rel.doc == skip) { continue }
    var shared = sharedHist && rel.sharedHist
    if (sharedHistOnly && !shared) { continue }
    f(rel.doc, shared)
    propagate(rel.doc, doc, shared)
  } }
}
propagate(doc, null, true)

}

// Attach a document to an editor. function attachDoc(cm, doc) {

if (doc.cm) { throw new Error("This document is already in use.") }
cm.doc = doc
doc.cm = cm
estimateLineHeights(cm)
loadMode(cm)
if (!cm.options.lineWrapping) { findMaxLine(cm) }
cm.options.mode = doc.modeOption
regChange(cm)

}

function History(startGen) {

// Arrays of change events and selections. Doing something adds an
// event to done and clears undo. Undoing moves events from done
// to undone, redoing moves them in the other direction.
this.done = []; this.undone = []
this.undoDepth = Infinity
// Used to track when changes can be merged into a single undo
// event
this.lastModTime = this.lastSelTime = 0
this.lastOp = this.lastSelOp = null
this.lastOrigin = this.lastSelOrigin = null
// Used by the isClean() method
this.generation = this.maxGeneration = startGen || 1

}

// Create a history change event from an updateDoc-style change // object. function historyChangeFromChange(doc, change) {

var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}
attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1)
linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true)
return histChange

}

// Pop all selection events off the end of a history array. Stop at // a change event. function clearSelectionEvents(array) {

while (array.length) {
  var last = lst(array)
  if (last.ranges) { array.pop() }
  else { break }
}

}

// Find the top change event in the history. Pop off selection // events that are in the way. function lastChangeEvent(hist, force) {

if (force) {
  clearSelectionEvents(hist.done)
  return lst(hist.done)
} else if (hist.done.length && !lst(hist.done).ranges) {
  return lst(hist.done)
} else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
  hist.done.pop()
  return lst(hist.done)
}

}

// Register a change in the history. Merges changes that are within // a single operation, or are close together with an origin that // allows merging (starting with “+”) into a single event. function addChangeToHistory(doc, change, selAfter, opId) {

var hist = doc.history
hist.undone.length = 0
var time = +new Date, cur
var last

if ((hist.lastOp == opId ||
     hist.lastOrigin == change.origin && change.origin &&
     ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
      change.origin.charAt(0) == "*")) &&
    (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
  // Merge this change into the last event
  last = lst(cur.changes)
  if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
    // Optimized case for simple insertion -- don't want to add
    // new changesets for every character typed
    last.to = changeEnd(change)
  } else {
    // Add new sub-event
    cur.changes.push(historyChangeFromChange(doc, change))
  }
} else {
  // Can not be merged, start a new event.
  var before = lst(hist.done)
  if (!before || !before.ranges)
    { pushSelectionToHistory(doc.sel, hist.done) }
  cur = {changes: [historyChangeFromChange(doc, change)],
         generation: hist.generation}
  hist.done.push(cur)
  while (hist.done.length > hist.undoDepth) {
    hist.done.shift()
    if (!hist.done[0].ranges) { hist.done.shift() }
  }
}
hist.done.push(selAfter)
hist.generation = ++hist.maxGeneration
hist.lastModTime = hist.lastSelTime = time
hist.lastOp = hist.lastSelOp = opId
hist.lastOrigin = hist.lastSelOrigin = change.origin

if (!last) { signal(doc, "historyAdded") }

}

function selectionEventCanBeMerged(doc, origin, prev, sel) {

var ch = origin.charAt(0)
return ch == "*" ||
  ch == "+" &&
  prev.ranges.length == sel.ranges.length &&
  prev.somethingSelected() == sel.somethingSelected() &&
  new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)

}

// Called whenever the selection changes, sets the new selection as // the pending selection in the history, and pushes the old pending // selection into the 'done' array when it was significantly // different (in number of selected ranges, emptiness, or time). function addSelectionToHistory(doc, sel, opId, options) {

var hist = doc.history, origin = options && options.origin

// A new event is started when the previous origin does not match
// the current, or the origins don't allow matching. Origins
// starting with * are always merged, those starting with + are
// merged when similar and close together in time.
if (opId == hist.lastSelOp ||
    (origin && hist.lastSelOrigin == origin &&
     (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
      selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
  { hist.done[hist.done.length - 1] = sel }
else
  { pushSelectionToHistory(sel, hist.done) }

hist.lastSelTime = +new Date
hist.lastSelOrigin = origin
hist.lastSelOp = opId
if (options && options.clearRedo !== false)
  { clearSelectionEvents(hist.undone) }

}

function pushSelectionToHistory(sel, dest) {

var top = lst(dest)
if (!(top && top.ranges && top.equals(sel)))
  { dest.push(sel) }

}

// Used to store marked span information in the history. function attachLocalSpans(doc, change, from, to) {

var existing = change["spans_" + doc.id], n = 0
doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
  if (line.markedSpans)
    { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans }
  ++n
})

}

// When un/re-doing restores text containing marked spans, those // that have been explicitly cleared should not be restored. function removeClearedSpans(spans) {

if (!spans) { return null }
var out
for (var i = 0; i < spans.length; ++i) {
  if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i) } }
  else if (out) { out.push(spans[i]) }
}
return !out ? spans : out.length ? out : null

}

// Retrieve and filter the old marked spans stored in a change event. function getOldSpans(doc, change) {

var found = change["spans_" + doc.id]
if (!found) { return null }
var nw = []
for (var i = 0; i < change.text.length; ++i)
  { nw.push(removeClearedSpans(found[i])) }
return nw

}

// Used for un/re-doing changes from the history. Combines the // result of computing the existing spans with the set of spans that // existed in the history (so that deleting around a span and then // undoing brings back the span). function mergeOldSpans(doc, change) {

var old = getOldSpans(doc, change)
var stretched = stretchSpansOverChange(doc, change)
if (!old) { return stretched }
if (!stretched) { return old }

for (var i = 0; i < old.length; ++i) {
  var oldCur = old[i], stretchCur = stretched[i]
  if (oldCur && stretchCur) {
    spans: for (var j = 0; j < stretchCur.length; ++j) {
      var span = stretchCur[j]
      for (var k = 0; k < oldCur.length; ++k)
        { if (oldCur[k].marker == span.marker) { continue spans } }
      oldCur.push(span)
    }
  } else if (stretchCur) {
    old[i] = stretchCur
  }
}
return old

}

// Used both to provide a JSON-safe object in .getHistory, and, when // detaching a document, to split the history in two function copyHistoryArray(events, newGroup, instantiateSel) {

var copy = []
for (var i = 0; i < events.length; ++i) {
  var event = events[i]
  if (event.ranges) {
    copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event)
    continue
  }
  var changes = event.changes, newChanges = []
  copy.push({changes: newChanges})
  for (var j = 0; j < changes.length; ++j) {
    var change = changes[j], m = void 0
    newChanges.push({from: change.from, to: change.to, text: change.text})
    if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
      if (indexOf(newGroup, Number(m[1])) > -1) {
        lst(newChanges)[prop] = change[prop]
        delete change[prop]
      }
    } } }
  }
}
return copy

}

// The 'scroll' parameter given to many of these indicated whether // the new cursor position should be scrolled into view after // modifying the selection.

// If shift is held or the extend flag is set, extends a range to // include a given position (and optionally a second position). // Otherwise, simply returns the range between the given positions. // Used for cursor motion and such. function extendRange(doc, range, head, other) {

if (doc.cm && doc.cm.display.shift || doc.extend) {
  var anchor = range.anchor
  if (other) {
    var posBefore = cmp(head, anchor) < 0
    if (posBefore != (cmp(other, anchor) < 0)) {
      anchor = head
      head = other
    } else if (posBefore != (cmp(head, other) < 0)) {
      head = other
    }
  }
  return new Range(anchor, head)
} else {
  return new Range(other || head, head)
}

}

// Extend the primary selection range, discard the rest. function extendSelection(doc, head, other, options) {

setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options)

}

// Extend all selections (pos is an array of selections with length // equal the number of selections) function extendSelections(doc, heads, options) {

var out = []
for (var i = 0; i < doc.sel.ranges.length; i++)
  { out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null) }
var newSel = normalizeSelection(out, doc.sel.primIndex)
setSelection(doc, newSel, options)

}

// Updates a single range in the selection. function replaceOneSelection(doc, i, range, options) {

var ranges = doc.sel.ranges.slice(0)
ranges[i] = range
setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options)

}

// Reset the selection to a single range. function setSimpleSelection(doc, anchor, head, options) {

setSelection(doc, simpleSelection(anchor, head), options)

}

// Give beforeSelectionChange handlers a change to influence a // selection update. function filterSelectionChange(doc, sel, options) {

var obj = {
  ranges: sel.ranges,
  update: function(ranges) {
    var this$1 = this;

    this.ranges = []
    for (var i = 0; i < ranges.length; i++)
      { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
                                 clipPos(doc, ranges[i].head)) }
  },
  origin: options && options.origin
}
signal(doc, "beforeSelectionChange", doc, obj)
if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj) }
if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
else { return sel }

}

function setSelectionReplaceHistory(doc, sel, options) {

var done = doc.history.done, last = lst(done)
if (last && last.ranges) {
  done[done.length - 1] = sel
  setSelectionNoUndo(doc, sel, options)
} else {
  setSelection(doc, sel, options)
}

}

// Set a new selection. function setSelection(doc, sel, options) {

setSelectionNoUndo(doc, sel, options)
addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)

}

function setSelectionNoUndo(doc, sel, options) {

if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
  { sel = filterSelectionChange(doc, sel, options) }

var bias = options && options.bias ||
  (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))

if (!(options && options.scroll === false) && doc.cm)
  { ensureCursorVisible(doc.cm) }

}

function setSelectionInner(doc, sel) {

if (sel.equals(doc.sel)) { return }

doc.sel = sel

if (doc.cm) {
  doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true
  signalCursorActivity(doc.cm)
}
signalLater(doc, "cursorActivity", doc)

}

// Verify that the selection does not partially select any atomic // marked ranges. function reCheckSelection(doc) {

setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll)

}

// Return a selection that does not partially select any atomic // ranges. function skipAtomicInSelection(doc, sel, bias, mayClear) {

var out
for (var i = 0; i < sel.ranges.length; i++) {
  var range = sel.ranges[i]
  var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
  var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
  var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
  if (out || newAnchor != range.anchor || newHead != range.head) {
    if (!out) { out = sel.ranges.slice(0, i) }
    out[i] = new Range(newAnchor, newHead)
  }
}
return out ? normalizeSelection(out, sel.primIndex) : sel

}

function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {

var line = getLine(doc, pos.line)
if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
  var sp = line.markedSpans[i], m = sp.marker
  if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
      (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
    if (mayClear) {
      signal(m, "beforeCursorEnter")
      if (m.explicitlyCleared) {
        if (!line.markedSpans) { break }
        else {--i; continue}
      }
    }
    if (!m.atomic) { continue }

    if (oldPos) {
      var near = m.find(dir < 0 ? 1 : -1), diff = void 0
      if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
        { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) }
      if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
        { return skipAtomicInner(doc, near, pos, dir, mayClear) }
    }

    var far = m.find(dir < 0 ? -1 : 1)
    if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
      { far = movePos(doc, far, dir, far.line == pos.line ? line : null) }
    return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
  }
} }
return pos

}

// Ensure a given position is not inside an atomic range. function skipAtomic(doc, pos, oldPos, bias, mayClear) {

var dir = bias || 1
var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
    (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
    skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
    (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
if (!found) {
  doc.cantEdit = true
  return Pos(doc.first, 0)
}
return found

}

function movePos(doc, pos, dir, line) {

if (dir < 0 && pos.ch == 0) {
  if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
  else { return null }
} else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
  if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
  else { return null }
} else {
  return new Pos(pos.line, pos.ch + dir)
}

}

function selectAll(cm) {

cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)

}

// UPDATING

// Allow “beforeChange” event handlers to influence a change function filterChange(doc, change, update) {

var obj = {
  canceled: false,
  from: change.from,
  to: change.to,
  text: change.text,
  origin: change.origin,
  cancel: function () { return obj.canceled = true; }
}
if (update) { obj.update = function (from, to, text, origin) {
  if (from) { obj.from = clipPos(doc, from) }
  if (to) { obj.to = clipPos(doc, to) }
  if (text) { obj.text = text }
  if (origin !== undefined) { obj.origin = origin }
} }
signal(doc, "beforeChange", doc, obj)
if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj) }

if (obj.canceled) { return null }
return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}

}

// Apply a change to a document, and add it to the document's // history, and propagating it to all linked documents. function makeChange(doc, change, ignoreReadOnly) {

if (doc.cm) {
  if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
  if (doc.cm.state.suppressEdits) { return }
}

if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
  change = filterChange(doc, change, true)
  if (!change) { return }
}

// Possibly split or suppress the update based on the presence
// of read-only spans in its range.
var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to)
if (split) {
  for (var i = split.length - 1; i >= 0; --i)
    { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text}) }
} else {
  makeChangeInner(doc, change)
}

}

function makeChangeInner(doc, change) {

if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
var selAfter = computeSelAfterChange(doc, change)
addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN)

makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change))
var rebased = []

linkedDocs(doc, function (doc, sharedHist) {
  if (!sharedHist && indexOf(rebased, doc.history) == -1) {
    rebaseHist(doc.history, change)
    rebased.push(doc.history)
  }
  makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change))
})

}

// Revert a change stored in a document's history. function makeChangeFromHistory(doc, type, allowSelectionOnly) {

if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }

var hist = doc.history, event, selAfter = doc.sel
var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done

// Verify that there is a useable event (so that ctrl-z won't
// needlessly clear selection events)
var i = 0
for (; i < source.length; i++) {
  event = source[i]
  if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
    { break }
}
if (i == source.length) { return }
hist.lastOrigin = hist.lastSelOrigin = null

for (;;) {
  event = source.pop()
  if (event.ranges) {
    pushSelectionToHistory(event, dest)
    if (allowSelectionOnly && !event.equals(doc.sel)) {
      setSelection(doc, event, {clearRedo: false})
      return
    }
    selAfter = event
  }
  else { break }
}

// Build up a reverse change object to add to the opposite history
// stack (redo when undoing, and vice versa).
var antiChanges = []
pushSelectionToHistory(selAfter, dest)
dest.push({changes: antiChanges, generation: hist.generation})
hist.generation = event.generation || ++hist.maxGeneration

var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")

var loop = function ( i ) {
  var change = event.changes[i]
  change.origin = type
  if (filter && !filterChange(doc, change, false)) {
    source.length = 0
    return {}
  }

  antiChanges.push(historyChangeFromChange(doc, change))

  var after = i ? computeSelAfterChange(doc, change) : lst(source)
  makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change))
  if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}) }
  var rebased = []

  // Propagate to the linked documents
  linkedDocs(doc, function (doc, sharedHist) {
    if (!sharedHist && indexOf(rebased, doc.history) == -1) {
      rebaseHist(doc.history, change)
      rebased.push(doc.history)
    }
    makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change))
  })
};

for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
  var returned = loop( i$1 );

  if ( returned ) return returned.v;
}

}

// Sub-views need their line numbers shifted when text is added // above or below them in the parent document. function shiftDoc(doc, distance) {

if (distance == 0) { return }
doc.first += distance
doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
  Pos(range.anchor.line + distance, range.anchor.ch),
  Pos(range.head.line + distance, range.head.ch)
); }), doc.sel.primIndex)
if (doc.cm) {
  regChange(doc.cm, doc.first, doc.first - distance, distance)
  for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
    { regLineChange(doc.cm, l, "gutter") }
}

}

// More lower-level change function, handling only a single document // (not linked ones). function makeChangeSingleDoc(doc, change, selAfter, spans) {

if (doc.cm && !doc.cm.curOp)
  { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }

if (change.to.line < doc.first) {
  shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line))
  return
}
if (change.from.line > doc.lastLine()) { return }

// Clip the change to the size of this doc
if (change.from.line < doc.first) {
  var shift = change.text.length - 1 - (doc.first - change.from.line)
  shiftDoc(doc, shift)
  change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
            text: [lst(change.text)], origin: change.origin}
}
var last = doc.lastLine()
if (change.to.line > last) {
  change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
            text: [change.text[0]], origin: change.origin}
}

change.removed = getBetween(doc, change.from, change.to)

if (!selAfter) { selAfter = computeSelAfterChange(doc, change) }
if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans) }
else { updateDoc(doc, change, spans) }
setSelectionNoUndo(doc, selAfter, sel_dontScroll)

}

// Handle the interaction of a change to a document with the editor // that this document is part of. function makeChangeSingleDocInEditor(cm, change, spans) {

var doc = cm.doc, display = cm.display, from = change.from, to = change.to

var recomputeMaxLength = false, checkWidthStart = from.line
if (!cm.options.lineWrapping) {
  checkWidthStart = lineNo(visualLine(getLine(doc, from.line)))
  doc.iter(checkWidthStart, to.line + 1, function (line) {
    if (line == display.maxLine) {
      recomputeMaxLength = true
      return true
    }
  })
}

if (doc.sel.contains(change.from, change.to) > -1)
  { signalCursorActivity(cm) }

updateDoc(doc, change, spans, estimateHeight(cm))

if (!cm.options.lineWrapping) {
  doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
    var len = lineLength(line)
    if (len > display.maxLineLength) {
      display.maxLine = line
      display.maxLineLength = len
      display.maxLineChanged = true
      recomputeMaxLength = false
    }
  })
  if (recomputeMaxLength) { cm.curOp.updateMaxLine = true }
}

// Adjust frontier, schedule worker
doc.frontier = Math.min(doc.frontier, from.line)
startWorker(cm, 400)

var lendiff = change.text.length - (to.line - from.line) - 1
// Remember that these lines changed, for updating the display
if (change.full)
  { regChange(cm) }
else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
  { regLineChange(cm, from.line, "text") }
else
  { regChange(cm, from.line, to.line + 1, lendiff) }

var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change")
if (changeHandler || changesHandler) {
  var obj = {
    from: from, to: to,
    text: change.text,
    removed: change.removed,
    origin: change.origin
  }
  if (changeHandler) { signalLater(cm, "change", cm, obj) }
  if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj) }
}
cm.display.selForContextMenu = null

}

function replaceRange(doc, code, from, to, origin) {

if (!to) { to = from }
if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp }
if (typeof code == "string") { code = doc.splitLines(code) }
makeChange(doc, {from: from, to: to, text: code, origin: origin})

}

// Rebasing/resetting history to deal with externally-sourced changes

function rebaseHistSelSingle(pos, from, to, diff) {

if (to < pos.line) {
  pos.line += diff
} else if (from < pos.line) {
  pos.line = from
  pos.ch = 0
}

}

// Tries to rebase an array of history events given a change in the // document. If the change touches the same lines as the event, the // event, and everything 'behind' it, is discarded. If the change is // before the event, the event's positions are updated. Uses a // copy-on-write scheme for the positions, to avoid having to // reallocate them all on every rebase, but also avoid problems with // shared position objects being unsafely updated. function rebaseHistArray(array, from, to, diff) {

for (var i = 0; i < array.length; ++i) {
  var sub = array[i], ok = true
  if (sub.ranges) {
    if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true }
    for (var j = 0; j < sub.ranges.length; j++) {
      rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff)
      rebaseHistSelSingle(sub.ranges[j].head, from, to, diff)
    }
    continue
  }
  for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
    var cur = sub.changes[j$1]
    if (to < cur.from.line) {
      cur.from = Pos(cur.from.line + diff, cur.from.ch)
      cur.to = Pos(cur.to.line + diff, cur.to.ch)
    } else if (from <= cur.to.line) {
      ok = false
      break
    }
  }
  if (!ok) {
    array.splice(0, i + 1)
    i = 0
  }
}

}

function rebaseHist(hist, change) {

var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1
rebaseHistArray(hist.done, from, to, diff)
rebaseHistArray(hist.undone, from, to, diff)

}

// Utility for applying a change to a line by handle or number, // returning the number and optionally registering the line as // changed. function changeLine(doc, handle, changeType, op) {

var no = handle, line = handle
if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)) }
else { no = lineNo(handle) }
if (no == null) { return null }
if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType) }
return line

}

// The document is represented as a BTree consisting of leaves, with // chunk of lines in them, and branches, with up to ten leaves or // other branch nodes below them. The top node is always a branch // node, and is the document object itself (meaning it has // additional methods and properties). // // All nodes have parent links. The tree is used both to go from // line numbers to line objects, and to go from objects to numbers. // It also indexes by height, and is used to convert between height // and line object, and to find the total height of the document. // // See also marijnhaverbeke.nl/blog/codemirror-line-tree.html

function LeafChunk(lines) {

var this$1 = this;

this.lines = lines
this.parent = null
var height = 0
for (var i = 0; i < lines.length; ++i) {
  lines[i].parent = this$1
  height += lines[i].height
}
this.height = height

}

LeafChunk.prototype = {

chunkSize: function() { return this.lines.length },
// Remove the n lines at offset 'at'.
removeInner: function(at, n) {
  var this$1 = this;

  for (var i = at, e = at + n; i < e; ++i) {
    var line = this$1.lines[i]
    this$1.height -= line.height
    cleanUpLine(line)
    signalLater(line, "delete")
  }
  this.lines.splice(at, n)
},
// Helper used to collapse a small branch into a single leaf.
collapse: function(lines) {
  lines.push.apply(lines, this.lines)
},
// Insert the given array of lines at offset 'at', count them as
// having the given height.
insertInner: function(at, lines, height) {
  var this$1 = this;

  this.height += height
  this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at))
  for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1 }
},
// Used to iterate over a part of the tree.
iterN: function(at, n, op) {
  var this$1 = this;

  for (var e = at + n; at < e; ++at)
    { if (op(this$1.lines[at])) { return true } }
}

}

function BranchChunk(children) {

var this$1 = this;

this.children = children
var size = 0, height = 0
for (var i = 0; i < children.length; ++i) {
  var ch = children[i]
  size += ch.chunkSize(); height += ch.height
  ch.parent = this$1
}
this.size = size
this.height = height
this.parent = null

}

BranchChunk.prototype = {

chunkSize: function() { return this.size },
removeInner: function(at, n) {
  var this$1 = this;

  this.size -= n
  for (var i = 0; i < this.children.length; ++i) {
    var child = this$1.children[i], sz = child.chunkSize()
    if (at < sz) {
      var rm = Math.min(n, sz - at), oldHeight = child.height
      child.removeInner(at, rm)
      this$1.height -= oldHeight - child.height
      if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null }
      if ((n -= rm) == 0) { break }
      at = 0
    } else { at -= sz }
  }
  // If the result is smaller than 25 lines, ensure that it is a
  // single leaf node.
  if (this.size - n < 25 &&
      (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
    var lines = []
    this.collapse(lines)
    this.children = [new LeafChunk(lines)]
    this.children[0].parent = this
  }
},
collapse: function(lines) {
  var this$1 = this;

  for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines) }
},
insertInner: function(at, lines, height) {
  var this$1 = this;

  this.size += lines.length
  this.height += height
  for (var i = 0; i < this.children.length; ++i) {
    var child = this$1.children[i], sz = child.chunkSize()
    if (at <= sz) {
      child.insertInner(at, lines, height)
      if (child.lines && child.lines.length > 50) {
        // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
        // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
        var remaining = child.lines.length % 25 + 25
        for (var pos = remaining; pos < child.lines.length;) {
          var leaf = new LeafChunk(child.lines.slice(pos, pos += 25))
          child.height -= leaf.height
          this$1.children.splice(++i, 0, leaf)
          leaf.parent = this$1
        }
        child.lines = child.lines.slice(0, remaining)
        this$1.maybeSpill()
      }
      break
    }
    at -= sz
  }
},
// When a node has grown, check whether it should be split.
maybeSpill: function() {
  if (this.children.length <= 10) { return }
  var me = this
  do {
    var spilled = me.children.splice(me.children.length - 5, 5)
    var sibling = new BranchChunk(spilled)
    if (!me.parent) { // Become the parent node
      var copy = new BranchChunk(me.children)
      copy.parent = me
      me.children = [copy, sibling]
      me = copy
   } else {
      me.size -= sibling.size
      me.height -= sibling.height
      var myIndex = indexOf(me.parent.children, me)
      me.parent.children.splice(myIndex + 1, 0, sibling)
    }
    sibling.parent = me.parent
  } while (me.children.length > 10)
  me.parent.maybeSpill()
},
iterN: function(at, n, op) {
  var this$1 = this;

  for (var i = 0; i < this.children.length; ++i) {
    var child = this$1.children[i], sz = child.chunkSize()
    if (at < sz) {
      var used = Math.min(n, sz - at)
      if (child.iterN(at, used, op)) { return true }
      if ((n -= used) == 0) { break }
      at = 0
    } else { at -= sz }
  }
}

}

// Line widgets are block elements displayed above or below a line.

function LineWidget(doc, node, options) {

var this$1 = this;

if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
  { this$1[opt] = options[opt] } } }
this.doc = doc
this.node = node

} eventMixin(LineWidget)

function adjustScrollWhenAboveVisible(cm, line, diff) {

if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
  { addToScrollPos(cm, null, diff) }

}

LineWidget.prototype.clear = function() {

var this$1 = this;

var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line)
if (no == null || !ws) { return }
for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1) } }
if (!ws.length) { line.widgets = null }
var height = widgetHeight(this)
updateLineHeight(line, Math.max(0, line.height - height))
if (cm) { runInOp(cm, function () {
  adjustScrollWhenAboveVisible(cm, line, -height)
  regLineChange(cm, no, "widget")
}) }

} LineWidget.prototype.changed = function() {

var oldH = this.height, cm = this.doc.cm, line = this.line
this.height = null
var diff = widgetHeight(this) - oldH
if (!diff) { return }
updateLineHeight(line, line.height + diff)
if (cm) { runInOp(cm, function () {
  cm.curOp.forceUpdate = true
  adjustScrollWhenAboveVisible(cm, line, diff)
}) }

}

function addLineWidget(doc, handle, node, options) {

var widget = new LineWidget(doc, node, options)
var cm = doc.cm
if (cm && widget.noHScroll) { cm.display.alignWidgets = true }
changeLine(doc, handle, "widget", function (line) {
  var widgets = line.widgets || (line.widgets = [])
  if (widget.insertAt == null) { widgets.push(widget) }
  else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget) }
  widget.line = line
  if (cm && !lineIsHidden(doc, line)) {
    var aboveVisible = heightAtLine(line) < doc.scrollTop
    updateLineHeight(line, line.height + widgetHeight(widget))
    if (aboveVisible) { addToScrollPos(cm, null, widget.height) }
    cm.curOp.forceUpdate = true
  }
  return true
})
return widget

}

// TEXTMARKERS

// Created with markText and setBookmark methods. A TextMarker is a // handle that can be used to clear or find a marked position in the // document. Line objects hold arrays (markedSpans) containing // {from, to, marker} object pointing to such marker objects, and // indicating that such a marker is present on that line. Multiple // lines may point to the same marker when it spans across lines. // The spans will have null for their from/to properties when the // marker continues beyond the start/end of the line. Markers have // links back to the lines they currently touch.

// Collapsed markers have unique ids, in order to be able to order // them, which is needed for uniquely determining an outer marker // when they overlap (they may nest, but not partially overlap). var nextMarkerId = 0

function TextMarker(doc, type) {

this.lines = []
this.type = type
this.doc = doc
this.id = ++nextMarkerId

} eventMixin(TextMarker)

// Clear the marker. TextMarker.prototype.clear = function() {

var this$1 = this;

if (this.explicitlyCleared) { return }
var cm = this.doc.cm, withOp = cm && !cm.curOp
if (withOp) { startOperation(cm) }
if (hasHandler(this, "clear")) {
  var found = this.find()
  if (found) { signalLater(this, "clear", found.from, found.to) }
}
var min = null, max = null
for (var i = 0; i < this.lines.length; ++i) {
  var line = this$1.lines[i]
  var span = getMarkedSpanFor(line.markedSpans, this$1)
  if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text") }
  else if (cm) {
    if (span.to != null) { max = lineNo(line) }
    if (span.from != null) { min = lineNo(line) }
  }
  line.markedSpans = removeMarkedSpan(line.markedSpans, span)
  if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
    { updateLineHeight(line, textHeight(cm.display)) }
}
if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
  var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual)
  if (len > cm.display.maxLineLength) {
    cm.display.maxLine = visual
    cm.display.maxLineLength = len
    cm.display.maxLineChanged = true
  }
} }

if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1) }
this.lines.length = 0
this.explicitlyCleared = true
if (this.atomic && this.doc.cantEdit) {
  this.doc.cantEdit = false
  if (cm) { reCheckSelection(cm.doc) }
}
if (cm) { signalLater(cm, "markerCleared", cm, this) }
if (withOp) { endOperation(cm) }
if (this.parent) { this.parent.clear() }

}

// Find the position of the marker in the document. Returns a {from, // to} object by default. Side can be passed to get a specific side // – 0 (both), -1 (left), or 1 (right). When lineObj is true, the // Pos objects returned contain a line object, rather than a line // number (used to prevent looking up the same line twice). TextMarker.prototype.find = function(side, lineObj) {

var this$1 = this;

if (side == null && this.type == "bookmark") { side = 1 }
var from, to
for (var i = 0; i < this.lines.length; ++i) {
  var line = this$1.lines[i]
  var span = getMarkedSpanFor(line.markedSpans, this$1)
  if (span.from != null) {
    from = Pos(lineObj ? line : lineNo(line), span.from)
    if (side == -1) { return from }
  }
  if (span.to != null) {
    to = Pos(lineObj ? line : lineNo(line), span.to)
    if (side == 1) { return to }
  }
}
return from && {from: from, to: to}

}

// Signals that the marker's widget changed, and surrounding layout // should be recomputed. TextMarker.prototype.changed = function() {

var pos = this.find(-1, true), widget = this, cm = this.doc.cm
if (!pos || !cm) { return }
runInOp(cm, function () {
  var line = pos.line, lineN = lineNo(pos.line)
  var view = findViewForLine(cm, lineN)
  if (view) {
    clearLineMeasurementCacheFor(view)
    cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
  }
  cm.curOp.updateMaxLine = true
  if (!lineIsHidden(widget.doc, line) && widget.height != null) {
    var oldHeight = widget.height
    widget.height = null
    var dHeight = widgetHeight(widget) - oldHeight
    if (dHeight)
      { updateLineHeight(line, line.height + dHeight) }
  }
})

}

TextMarker.prototype.attachLine = function(line) {

if (!this.lines.length && this.doc.cm) {
  var op = this.doc.cm.curOp
  if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
    { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this) }
}
this.lines.push(line)

} TextMarker.prototype.detachLine = function(line) {

this.lines.splice(indexOf(this.lines, line), 1)
if (!this.lines.length && this.doc.cm) {
  var op = this.doc.cm.curOp;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
}

}

// Create a marker, wire it up to the right lines, and function markText(doc, from, to, options, type) {

// Shared markers (across linked documents) are handled separately
// (markTextShared will call out to this again, once per
// document).
if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
// Ensure we are in an operation.
if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }

var marker = new TextMarker(doc, type), diff = cmp(from, to)
if (options) { copyObj(options, marker, false) }
// Don't connect empty markers unless clearWhenEmpty is false
if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
  { return marker }
if (marker.replacedWith) {
  // Showing up as a widget implies collapsed (widget replaces text)
  marker.collapsed = true
  marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget")
  if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true") }
  if (options.insertLeft) { marker.widgetNode.insertLeft = true }
}
if (marker.collapsed) {
  if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
      from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
    { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
  seeCollapsedSpans()
}

if (marker.addToHistory)
  { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN) }

var curLine = from.line, cm = doc.cm, updateMaxLine
doc.iter(curLine, to.line + 1, function (line) {
  if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
    { updateMaxLine = true }
  if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0) }
  addMarkedSpan(line, new MarkedSpan(marker,
                                     curLine == from.line ? from.ch : null,
                                     curLine == to.line ? to.ch : null))
  ++curLine
})
// lineIsHidden depends on the presence of the spans, so needs a second pass
if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
  if (lineIsHidden(doc, line)) { updateLineHeight(line, 0) }
}) }

if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }) }

if (marker.readOnly) {
  seeReadOnlySpans()
  if (doc.history.done.length || doc.history.undone.length)
    { doc.clearHistory() }
}
if (marker.collapsed) {
  marker.id = ++nextMarkerId
  marker.atomic = true
}
if (cm) {
  // Sync editor state
  if (updateMaxLine) { cm.curOp.updateMaxLine = true }
  if (marker.collapsed)
    { regChange(cm, from.line, to.line + 1) }
  else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
    { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text") } }
  if (marker.atomic) { reCheckSelection(cm.doc) }
  signalLater(cm, "markerAdded", cm, marker)
}
return marker

}

// SHARED TEXTMARKERS

// A shared marker spans multiple linked documents. It is // implemented as a meta-marker-object controlling multiple normal // markers. function SharedTextMarker(markers, primary) {

var this$1 = this;

this.markers = markers
this.primary = primary
for (var i = 0; i < markers.length; ++i)
  { markers[i].parent = this$1 }

} eventMixin(SharedTextMarker)

SharedTextMarker.prototype.clear = function() {

var this$1 = this;

if (this.explicitlyCleared) { return }
this.explicitlyCleared = true
for (var i = 0; i < this.markers.length; ++i)
  { this$1.markers[i].clear() }
signalLater(this, "clear")

} SharedTextMarker.prototype.find = function(side, lineObj) {

return this.primary.find(side, lineObj)

}

function markTextShared(doc, from, to, options, type) {

options = copyObj(options)
options.shared = false
var markers = [markText(doc, from, to, options, type)], primary = markers[0]
var widget = options.widgetNode
linkedDocs(doc, function (doc) {
  if (widget) { options.widgetNode = widget.cloneNode(true) }
  markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
  for (var i = 0; i < doc.linked.length; ++i)
    { if (doc.linked[i].isParent) { return } }
  primary = lst(markers)
})
return new SharedTextMarker(markers, primary)

}

function findSharedMarkers(doc) {

return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })

}

function copySharedMarkers(doc, markers) {

for (var i = 0; i < markers.length; i++) {
  var marker = markers[i], pos = marker.find()
  var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
  if (cmp(mFrom, mTo)) {
    var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
    marker.markers.push(subMark)
    subMark.parent = marker
  }
}

}

function detachSharedMarkers(markers) {

var loop = function ( i ) {
  var marker = markers[i], linked = [marker.primary.doc]
  linkedDocs(marker.primary.doc, function (d) { return linked.push(d); })
  for (var j = 0; j < marker.markers.length; j++) {
    var subMarker = marker.markers[j]
    if (indexOf(linked, subMarker.doc) == -1) {
      subMarker.parent = null
      marker.markers.splice(j--, 1)
    }
  }
};

for (var i = 0; i < markers.length; i++) loop( i );

}

var nextDocId = 0 var Doc = function(text, mode, firstLine, lineSep) {

if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep) }
if (firstLine == null) { firstLine = 0 }

BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
this.first = firstLine
this.scrollTop = this.scrollLeft = 0
this.cantEdit = false
this.cleanGeneration = 1
this.frontier = firstLine
var start = Pos(firstLine, 0)
this.sel = simpleSelection(start)
this.history = new History(null)
this.id = ++nextDocId
this.modeOption = mode
this.lineSep = lineSep
this.extend = false

if (typeof text == "string") { text = this.splitLines(text) }
updateDoc(this, {from: start, to: start, text: text})
setSelection(this, simpleSelection(start), sel_dontScroll)

}

Doc.prototype = createObj(BranchChunk.prototype, {

constructor: Doc,
// Iterate over the document. Supports two forms -- with only one
// argument, it calls that for each line in the document. With
// three, it iterates over the range given by the first two (with
// the second being non-inclusive).
iter: function(from, to, op) {
  if (op) { this.iterN(from - this.first, to - from, op) }
  else { this.iterN(this.first, this.first + this.size, from) }
},

// Non-public interface for adding and removing lines.
insert: function(at, lines) {
  var height = 0
  for (var i = 0; i < lines.length; ++i) { height += lines[i].height }
  this.insertInner(at - this.first, lines, height)
},
remove: function(at, n) { this.removeInner(at - this.first, n) },

// From here, the methods are part of the public interface. Most
// are also available from CodeMirror (editor) instances.

getValue: function(lineSep) {
  var lines = getLines(this, this.first, this.first + this.size)
  if (lineSep === false) { return lines }
  return lines.join(lineSep || this.lineSeparator())
},
setValue: docMethodOp(function(code) {
  var top = Pos(this.first, 0), last = this.first + this.size - 1
  makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
                    text: this.splitLines(code), origin: "setValue", full: true}, true)
  setSelection(this, simpleSelection(top))
}),
replaceRange: function(code, from, to, origin) {
  from = clipPos(this, from)
  to = to ? clipPos(this, to) : from
  replaceRange(this, code, from, to, origin)
},
getRange: function(from, to, lineSep) {
  var lines = getBetween(this, clipPos(this, from), clipPos(this, to))
  if (lineSep === false) { return lines }
  return lines.join(lineSep || this.lineSeparator())
},

getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},

getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
getLineNumber: function(line) {return lineNo(line)},

getLineHandleVisualStart: function(line) {
  if (typeof line == "number") { line = getLine(this, line) }
  return visualLine(line)
},

lineCount: function() {return this.size},
firstLine: function() {return this.first},
lastLine: function() {return this.first + this.size - 1},

clipPos: function(pos) {return clipPos(this, pos)},

getCursor: function(start) {
  var range$$1 = this.sel.primary(), pos
  if (start == null || start == "head") { pos = range$$1.head }
  else if (start == "anchor") { pos = range$$1.anchor }
  else if (start == "end" || start == "to" || start === false) { pos = range$$1.to() }
  else { pos = range$$1.from() }
  return pos
},
listSelections: function() { return this.sel.ranges },
somethingSelected: function() {return this.sel.somethingSelected()},

setCursor: docMethodOp(function(line, ch, options) {
  setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
}),
setSelection: docMethodOp(function(anchor, head, options) {
  setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
}),
extendSelection: docMethodOp(function(head, other, options) {
  extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
}),
extendSelections: docMethodOp(function(heads, options) {
  extendSelections(this, clipPosArray(this, heads), options)
}),
extendSelectionsBy: docMethodOp(function(f, options) {
  var heads = map(this.sel.ranges, f)
  extendSelections(this, clipPosArray(this, heads), options)
}),
setSelections: docMethodOp(function(ranges, primary, options) {
  var this$1 = this;

  if (!ranges.length) { return }
  var out = []
  for (var i = 0; i < ranges.length; i++)
    { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
                       clipPos(this$1, ranges[i].head)) }
  if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex) }
  setSelection(this, normalizeSelection(out, primary), options)
}),
addSelection: docMethodOp(function(anchor, head, options) {
  var ranges = this.sel.ranges.slice(0)
  ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
  setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
}),

getSelection: function(lineSep) {
  var this$1 = this;

  var ranges = this.sel.ranges, lines
  for (var i = 0; i < ranges.length; i++) {
    var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
    lines = lines ? lines.concat(sel) : sel
  }
  if (lineSep === false) { return lines }
  else { return lines.join(lineSep || this.lineSeparator()) }
},
getSelections: function(lineSep) {
  var this$1 = this;

  var parts = [], ranges = this.sel.ranges
  for (var i = 0; i < ranges.length; i++) {
    var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
    if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()) }
    parts[i] = sel
  }
  return parts
},
replaceSelection: function(code, collapse, origin) {
  var dup = []
  for (var i = 0; i < this.sel.ranges.length; i++)
    { dup[i] = code }
  this.replaceSelections(dup, collapse, origin || "+input")
},
replaceSelections: docMethodOp(function(code, collapse, origin) {
  var this$1 = this;

  var changes = [], sel = this.sel
  for (var i = 0; i < sel.ranges.length; i++) {
    var range$$1 = sel.ranges[i]
    changes[i] = {from: range$$1.from(), to: range$$1.to(), text: this$1.splitLines(code[i]), origin: origin}
  }
  var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
  for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
    { makeChange(this$1, changes[i$1]) }
  if (newSel) { setSelectionReplaceHistory(this, newSel) }
  else if (this.cm) { ensureCursorVisible(this.cm) }
}),
undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),

setExtending: function(val) {this.extend = val},
getExtending: function() {return this.extend},

historySize: function() {
  var hist = this.history, done = 0, undone = 0
  for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done } }
  for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone } }
  return {undo: done, redo: undone}
},
clearHistory: function() {this.history = new History(this.history.maxGeneration)},

markClean: function() {
  this.cleanGeneration = this.changeGeneration(true)
},
changeGeneration: function(forceSplit) {
  if (forceSplit)
    { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null }
  return this.history.generation
},
isClean: function (gen) {
  return this.history.generation == (gen || this.cleanGeneration)
},

getHistory: function() {
  return {done: copyHistoryArray(this.history.done),
          undone: copyHistoryArray(this.history.undone)}
},
setHistory: function(histData) {
  var hist = this.history = new History(this.history.maxGeneration)
  hist.done = copyHistoryArray(histData.done.slice(0), null, true)
  hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
},

addLineClass: docMethodOp(function(handle, where, cls) {
  return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
    var prop = where == "text" ? "textClass"
             : where == "background" ? "bgClass"
             : where == "gutter" ? "gutterClass" : "wrapClass"
    if (!line[prop]) { line[prop] = cls }
    else if (classTest(cls).test(line[prop])) { return false }
    else { line[prop] += " " + cls }
    return true
  })
}),
removeLineClass: docMethodOp(function(handle, where, cls) {
  return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
    var prop = where == "text" ? "textClass"
             : where == "background" ? "bgClass"
             : where == "gutter" ? "gutterClass" : "wrapClass"
    var cur = line[prop]
    if (!cur) { return false }
    else if (cls == null) { line[prop] = null }
    else {
      var found = cur.match(classTest(cls))
      if (!found) { return false }
      var end = found.index + found[0].length
      line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null
    }
    return true
  })
}),

addLineWidget: docMethodOp(function(handle, node, options) {
  return addLineWidget(this, handle, node, options)
}),
removeLineWidget: function(widget) { widget.clear() },

markText: function(from, to, options) {
  return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
},
setBookmark: function(pos, options) {
  var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
                  insertLeft: options && options.insertLeft,
                  clearWhenEmpty: false, shared: options && options.shared,
                  handleMouseEvents: options && options.handleMouseEvents}
  pos = clipPos(this, pos)
  return markText(this, pos, pos, realOpts, "bookmark")
},
findMarksAt: function(pos) {
  pos = clipPos(this, pos)
  var markers = [], spans = getLine(this, pos.line).markedSpans
  if (spans) { for (var i = 0; i < spans.length; ++i) {
    var span = spans[i]
    if ((span.from == null || span.from <= pos.ch) &&
        (span.to == null || span.to >= pos.ch))
      { markers.push(span.marker.parent || span.marker) }
  } }
  return markers
},
findMarks: function(from, to, filter) {
  from = clipPos(this, from); to = clipPos(this, to)
  var found = [], lineNo$$1 = from.line
  this.iter(from.line, to.line + 1, function (line) {
    var spans = line.markedSpans
    if (spans) { for (var i = 0; i < spans.length; i++) {
      var span = spans[i]
      if (!(span.to != null && lineNo$$1 == from.line && from.ch >= span.to ||
            span.from == null && lineNo$$1 != from.line ||
            span.from != null && lineNo$$1 == to.line && span.from >= to.ch) &&
          (!filter || filter(span.marker)))
        { found.push(span.marker.parent || span.marker) }
    } }
    ++lineNo$$1
  })
  return found
},
getAllMarks: function() {
  var markers = []
  this.iter(function (line) {
    var sps = line.markedSpans
    if (sps) { for (var i = 0; i < sps.length; ++i)
      { if (sps[i].from != null) { markers.push(sps[i].marker) } } }
  })
  return markers
},

posFromIndex: function(off) {
  var ch, lineNo$$1 = this.first, sepSize = this.lineSeparator().length
  this.iter(function (line) {
    var sz = line.text.length + sepSize
    if (sz > off) { ch = off; return true }
    off -= sz
    ++lineNo$$1
  })
  return clipPos(this, Pos(lineNo$$1, ch))
},
indexFromPos: function (coords) {
  coords = clipPos(this, coords)
  var index = coords.ch
  if (coords.line < this.first || coords.ch < 0) { return 0 }
  var sepSize = this.lineSeparator().length
  this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
    index += line.text.length + sepSize
  })
  return index
},

copy: function(copyHistory) {
  var doc = new Doc(getLines(this, this.first, this.first + this.size),
                    this.modeOption, this.first, this.lineSep)
  doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
  doc.sel = this.sel
  doc.extend = false
  if (copyHistory) {
    doc.history.undoDepth = this.history.undoDepth
    doc.setHistory(this.getHistory())
  }
  return doc
},

linkedDoc: function(options) {
  if (!options) { options = {} }
  var from = this.first, to = this.first + this.size
  if (options.from != null && options.from > from) { from = options.from }
  if (options.to != null && options.to < to) { to = options.to }
  var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep)
  if (options.sharedHist) { copy.history = this.history
  ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
  copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
  copySharedMarkers(copy, findSharedMarkers(this))
  return copy
},
unlinkDoc: function(other) {
  var this$1 = this;

  if (other instanceof CodeMirror$1) { other = other.doc }
  if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
    var link = this$1.linked[i]
    if (link.doc != other) { continue }
    this$1.linked.splice(i, 1)
    other.unlinkDoc(this$1)
    detachSharedMarkers(findSharedMarkers(this$1))
    break
  } }
  // If the histories were shared, split them again
  if (other.history == this.history) {
    var splitIds = [other.id]
    linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true)
    other.history = new History(null)
    other.history.done = copyHistoryArray(this.history.done, splitIds)
    other.history.undone = copyHistoryArray(this.history.undone, splitIds)
  }
},
iterLinkedDocs: function(f) {linkedDocs(this, f)},

getMode: function() {return this.mode},
getEditor: function() {return this.cm},

splitLines: function(str) {
  if (this.lineSep) { return str.split(this.lineSep) }
  return splitLinesAuto(str)
},
lineSeparator: function() { return this.lineSep || "\n" }

})

// Public alias. Doc.prototype.eachLine = Doc.prototype.iter

// Kludge to work around strange IE behavior where it'll sometimes // re-fire a series of drag-related events right after the drop (#1551) var lastDrop = 0

function onDrop(e) {

var cm = this
clearDragCursor(cm)
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
  { return }
e_preventDefault(e)
if (ie) { lastDrop = +new Date }
var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
if (!pos || cm.isReadOnly()) { return }
// Might be a file drop, in which case we simply extract the text
// and insert it.
if (files && files.length && window.FileReader && window.File) {
  var n = files.length, text = Array(n), read = 0
  var loadFile = function (file, i) {
    if (cm.options.allowDropFileTypes &&
        indexOf(cm.options.allowDropFileTypes, file.type) == -1)
      { return }

    var reader = new FileReader
    reader.onload = operation(cm, function () {
      var content = reader.result
      if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = "" }
      text[i] = content
      if (++read == n) {
        pos = clipPos(cm.doc, pos)
        var change = {from: pos, to: pos,
                      text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
                      origin: "paste"}
        makeChange(cm.doc, change)
        setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)))
      }
    })
    reader.readAsText(file)
  }
  for (var i = 0; i < n; ++i) { loadFile(files[i], i) }
} else { // Normal drop
  // Don't do a replace if the drop happened inside of the selected text.
  if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
    cm.state.draggingText(e)
    // Ensure the editor is re-focused
    setTimeout(function () { return cm.display.input.focus(); }, 20)
    return
  }
  try {
    var text$1 = e.dataTransfer.getData("Text")
    if (text$1) {
      var selected
      if (cm.state.draggingText && !cm.state.draggingText.copy)
        { selected = cm.listSelections() }
      setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
      if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
        { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag") } }
      cm.replaceSelection(text$1, "around", "paste")
      cm.display.input.focus()
    }
  }
  catch(e){}
}

}

function onDragStart(cm, e) {

if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }

e.dataTransfer.setData("Text", cm.getSelection())
e.dataTransfer.effectAllowed = "copyMove"

// Use dummy image instead of default browsers image.
// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
if (e.dataTransfer.setDragImage && !safari) {
  var img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
  img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
  if (presto) {
    img.width = img.height = 1
    cm.display.wrapper.appendChild(img)
    // Force a relayout, or Opera won't use our image for some obscure reason
    img._top = img.offsetTop
  }
  e.dataTransfer.setDragImage(img, 0, 0)
  if (presto) { img.parentNode.removeChild(img) }
}

}

function onDragOver(cm, e) {

var pos = posFromMouse(cm, e)
if (!pos) { return }
var frag = document.createDocumentFragment()
drawSelectionCursor(cm, pos, frag)
if (!cm.display.dragCursor) {
  cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
  cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
}
removeChildrenAndAdd(cm.display.dragCursor, frag)

}

function clearDragCursor(cm) {

if (cm.display.dragCursor) {
  cm.display.lineSpace.removeChild(cm.display.dragCursor)
  cm.display.dragCursor = null
}

}

// These must be handled carefully, because naively registering a // handler for each editor will cause the editors to never be // garbage collected.

function forEachCodeMirror(f) {

if (!document.body.getElementsByClassName) { return }
var byClass = document.body.getElementsByClassName("CodeMirror")
for (var i = 0; i < byClass.length; i++) {
  var cm = byClass[i].CodeMirror
  if (cm) { f(cm) }
}

}

var globalsRegistered = false function ensureGlobalHandlers() {

if (globalsRegistered) { return }
registerGlobalHandlers()
globalsRegistered = true

} function registerGlobalHandlers() {

// When the window resizes, we need to refresh active editors.
var resizeTimer
on(window, "resize", function () {
  if (resizeTimer == null) { resizeTimer = setTimeout(function () {
    resizeTimer = null
    forEachCodeMirror(onResize)
  }, 100) }
})
// When the window loses focus, we want to show the editor as blurred
on(window, "blur", function () { return forEachCodeMirror(onBlur); })

} // Called when the window resizes function onResize(cm) {

var d = cm.display
if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
  { return }
// Might be a text scaling operation, clear size caches.
d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
d.scrollbarsClipped = false
cm.setSize()

}

var keyNames = {

3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"

}

// Number keys for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i) } // Alphabetic keys for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames = String.fromCharCode(i$1) } // Function keys for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = “F” + i$2 }

var keyMap = {}

keyMap.basic = {

"Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
"End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
"Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
"Tab": "defaultTab", "Shift-Tab": "indentAuto",
"Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
"Esc": "singleSelection"

} // Note that the save and find-related commands aren't defined by // default. User code or addons can define them. Unknown commands // are simply ignored. keyMap.pcDefault = {

"Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
"Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
"Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
"Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
"Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
"Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
"Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
fallthrough: "basic"

} // Very basic readline/emacs-style bindings, which are standard on Mac. keyMap.emacsy = {

"Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
"Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
"Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
"Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
"Ctrl-O": "openLine"

} keyMap.macDefault = {

"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
"Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
"Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
"Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
"Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
"Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
"Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
fallthrough: ["basic", "emacsy"]

} keyMap = mac ? keyMap.macDefault : keyMap.pcDefault

// KEYMAP DISPATCH

function normalizeKeyName(name) {

var parts = name.split(/-(?!$)/)
name = parts[parts.length - 1]
var alt, ctrl, shift, cmd
for (var i = 0; i < parts.length - 1; i++) {
  var mod = parts[i]
  if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true }
  else if (/^a(lt)?$/i.test(mod)) { alt = true }
  else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true }
  else if (/^s(hift)?$/i.test(mod)) { shift = true }
  else { throw new Error("Unrecognized modifier name: " + mod) }
}
if (alt) { name = "Alt-" + name }
if (ctrl) { name = "Ctrl-" + name }
if (cmd) { name = "Cmd-" + name }
if (shift) { name = "Shift-" + name }
return name

}

// This is a kludge to keep keymaps mostly working as raw objects // (backwards compatibility) while at the same time support features // like normalization and multi-stroke key bindings. It compiles a // new normalized keymap, and then updates the old object to reflect // this. function normalizeKeyMap(keymap) {

var copy = {}
for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
  var value = keymap[keyname]
  if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
  if (value == "...") { delete keymap[keyname]; continue }

  var keys = map(keyname.split(" "), normalizeKeyName)
  for (var i = 0; i < keys.length; i++) {
    var val = void 0, name = void 0
    if (i == keys.length - 1) {
      name = keys.join(" ")
      val = value
    } else {
      name = keys.slice(0, i + 1).join(" ")
      val = "..."
    }
    var prev = copy[name]
    if (!prev) { copy[name] = val }
    else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
  }
  delete keymap[keyname]
} }
for (var prop in copy) { keymap[prop] = copy[prop] }
return keymap

}

function lookupKey(key, map$$1, handle, context) {

map$$1 = getKeyMap(map$$1)
var found = map$$1.call ? map$$1.call(key, context) : map$$1[key]
if (found === false) { return "nothing" }
if (found === "...") { return "multi" }
if (found != null && handle(found)) { return "handled" }

if (map$$1.fallthrough) {
  if (Object.prototype.toString.call(map$$1.fallthrough) != "[object Array]")
    { return lookupKey(key, map$$1.fallthrough, handle, context) }
  for (var i = 0; i < map$$1.fallthrough.length; i++) {
    var result = lookupKey(key, map$$1.fallthrough[i], handle, context)
    if (result) { return result }
  }
}

}

// Modifier key presses don't count as 'real' key presses for the // purpose of keymap fallthrough. function isModifierKey(value) {

var name = typeof value == "string" ? value : keyNames[value.keyCode]
return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"

}

// Look up the name of a key as indicated by an event object. function keyName(event, noShift) {

if (presto && event.keyCode == 34 && event["char"]) { return false }
var base = keyNames[event.keyCode], name = base
if (name == null || event.altGraphKey) { return false }
if (event.altKey && base != "Alt") { name = "Alt-" + name }
if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name }
if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name }
if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name }
return name

}

function getKeyMap(val) {

return typeof val == "string" ? keyMap[val] : val

}

// Helper for deleting text near the selection(s), used to implement // backspace, delete, and similar functionality. function deleteNearSelection(cm, compute) {

var ranges = cm.doc.sel.ranges, kill = []
// Build up a set of ranges to kill first, merging overlapping
// ranges.
for (var i = 0; i < ranges.length; i++) {
  var toKill = compute(ranges[i])
  while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
    var replaced = kill.pop()
    if (cmp(replaced.from, toKill.from) < 0) {
      toKill.from = replaced.from
      break
    }
  }
  kill.push(toKill)
}
// Next, remove those actual ranges.
runInOp(cm, function () {
  for (var i = kill.length - 1; i >= 0; i--)
    { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") }
  ensureCursorVisible(cm)
})

}

// Commands are parameter-less actions that can be performed on an // editor, mostly used for keybindings. var commands = {

selectAll: selectAll,
singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
killLine: function (cm) { return deleteNearSelection(cm, function (range) {
  if (range.empty()) {
    var len = getLine(cm.doc, range.head.line).text.length
    if (range.head.ch == len && range.head.line < cm.lastLine())
      { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
    else
      { return {from: range.head, to: Pos(range.head.line, len)} }
  } else {
    return {from: range.from(), to: range.to()}
  }
}); },
deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
  from: Pos(range.from().line, 0),
  to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
}); }); },
delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
  from: Pos(range.from().line, 0), to: range.from()
}); }); },
delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
  var top = cm.charCoords(range.head, "div").top + 5
  var leftPos = cm.coordsChar({left: 0, top: top}, "div")
  return {from: leftPos, to: range.from()}
}); },
delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
  var top = cm.charCoords(range.head, "div").top + 5
  var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
  return {from: range.from(), to: rightPos }
}); },
undo: function (cm) { return cm.undo(); },
redo: function (cm) { return cm.redo(); },
undoSelection: function (cm) { return cm.undoSelection(); },
redoSelection: function (cm) { return cm.redoSelection(); },
goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
  {origin: "+move", bias: 1}
); },
goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
  {origin: "+move", bias: 1}
); },
goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
  {origin: "+move", bias: -1}
); },
goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
  var top = cm.charCoords(range.head, "div").top + 5
  return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
}, sel_move); },
goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
  var top = cm.charCoords(range.head, "div").top + 5
  return cm.coordsChar({left: 0, top: top}, "div")
}, sel_move); },
goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
  var top = cm.charCoords(range.head, "div").top + 5
  var pos = cm.coordsChar({left: 0, top: top}, "div")
  if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
  return pos
}, sel_move); },
goLineUp: function (cm) { return cm.moveV(-1, "line"); },
goLineDown: function (cm) { return cm.moveV(1, "line"); },
goPageUp: function (cm) { return cm.moveV(-1, "page"); },
goPageDown: function (cm) { return cm.moveV(1, "page"); },
goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
goCharRight: function (cm) { return cm.moveH(1, "char"); },
goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
goColumnRight: function (cm) { return cm.moveH(1, "column"); },
goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
goGroupRight: function (cm) { return cm.moveH(1, "group"); },
goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
goWordRight: function (cm) { return cm.moveH(1, "word"); },
delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
indentAuto: function (cm) { return cm.indentSelection("smart"); },
indentMore: function (cm) { return cm.indentSelection("add"); },
indentLess: function (cm) { return cm.indentSelection("subtract"); },
insertTab: function (cm) { return cm.replaceSelection("\t"); },
insertSoftTab: function (cm) {
  var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize
  for (var i = 0; i < ranges.length; i++) {
    var pos = ranges[i].from()
    var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize)
    spaces.push(spaceStr(tabSize - col % tabSize))
  }
  cm.replaceSelections(spaces)
},
defaultTab: function (cm) {
  if (cm.somethingSelected()) { cm.indentSelection("add") }
  else { cm.execCommand("insertTab") }
},
// Swap the two chars left and right of each selection's head.
// Move cursor behind the two swapped characters afterwards.
//
// Doesn't consider line feeds a character.
// Doesn't scan more than one line above to find a character.
// Doesn't do anything on an empty line.
// Doesn't do anything with non-empty selections.
transposeChars: function (cm) { return runInOp(cm, function () {
  var ranges = cm.listSelections(), newSel = []
  for (var i = 0; i < ranges.length; i++) {
    if (!ranges[i].empty()) { continue }
    var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text
    if (line) {
      if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1) }
      if (cur.ch > 0) {
        cur = new Pos(cur.line, cur.ch + 1)
        cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
                        Pos(cur.line, cur.ch - 2), cur, "+transpose")
      } else if (cur.line > cm.doc.first) {
        var prev = getLine(cm.doc, cur.line - 1).text
        if (prev) {
          cur = new Pos(cur.line, 1)
          cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
                          prev.charAt(prev.length - 1),
                          Pos(cur.line - 1, prev.length - 1), cur, "+transpose")
        }
      }
    }
    newSel.push(new Range(cur, cur))
  }
  cm.setSelections(newSel)
}); },
newlineAndIndent: function (cm) { return runInOp(cm, function () {
  var sels = cm.listSelections()
  for (var i = sels.length - 1; i >= 0; i--)
    { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input") }
  sels = cm.listSelections()
  for (var i$1 = 0; i$1 < sels.length; i$1++)
    { cm.indentLine(sels[i$1].from().line, null, true) }
  ensureCursorVisible(cm)
}); },
openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }

}

function lineStart(cm, lineN) {

var line = getLine(cm.doc, lineN)
var visual = visualLine(line)
if (visual != line) { lineN = lineNo(visual) }
var order = getOrder(visual)
var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual)
return Pos(lineN, ch)

} function lineEnd(cm, lineN) {

var merged, line = getLine(cm.doc, lineN)
while (merged = collapsedSpanAtEnd(line)) {
  line = merged.find(1, true).line
  lineN = null
}
var order = getOrder(line)
var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line)
return Pos(lineN == null ? lineNo(line) : lineN, ch)

} function lineStartSmart(cm, pos) {

var start = lineStart(cm, pos.line)
var line = getLine(cm.doc, start.line)
var order = getOrder(line)
if (!order || order[0].level == 0) {
  var firstNonWS = Math.max(0, line.text.search(/\S/))
  var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch
  return Pos(start.line, inWS ? 0 : firstNonWS)
}
return start

}

// Run a handler that was bound to a key. function doHandleBinding(cm, bound, dropShift) {

if (typeof bound == "string") {
  bound = commands[bound]
  if (!bound) { return false }
}
// Ensure previous input has been read, so that the handler sees a
// consistent view of the document
cm.display.input.ensurePolled()
var prevShift = cm.display.shift, done = false
try {
  if (cm.isReadOnly()) { cm.state.suppressEdits = true }
  if (dropShift) { cm.display.shift = false }
  done = bound(cm) != Pass
} finally {
  cm.display.shift = prevShift
  cm.state.suppressEdits = false
}
return done

}

function lookupKeyForEditor(cm, name, handle) {

for (var i = 0; i < cm.state.keyMaps.length; i++) {
  var result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
  if (result) { return result }
}
return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
  || lookupKey(name, cm.options.keyMap, handle, cm)

}

var stopSeq = new Delayed function dispatchKey(cm, name, e, handle) {

var seq = cm.state.keySeq
if (seq) {
  if (isModifierKey(name)) { return "handled" }
  stopSeq.set(50, function () {
    if (cm.state.keySeq == seq) {
      cm.state.keySeq = null
      cm.display.input.reset()
    }
  })
  name = seq + " " + name
}
var result = lookupKeyForEditor(cm, name, handle)

if (result == "multi")
  { cm.state.keySeq = name }
if (result == "handled")
  { signalLater(cm, "keyHandled", cm, name, e) }

if (result == "handled" || result == "multi") {
  e_preventDefault(e)
  restartBlink(cm)
}

if (seq && !result && /\'$/.test(name)) {
  e_preventDefault(e)
  return true
}
return !!result

}

// Handle a key from the keydown event. function handleKeyBinding(cm, e) {

var name = keyName(e, true)
if (!name) { return false }

if (e.shiftKey && !cm.state.keySeq) {
  // First try to resolve full name (including 'Shift-'). Failing
  // that, see if there is a cursor-motion command (starting with
  // 'go') bound to the keyname without 'Shift-'.
  return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
      || dispatchKey(cm, name, e, function (b) {
           if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
             { return doHandleBinding(cm, b) }
         })
} else {
  return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
}

}

// Handle a key from the keypress event function handleCharBinding(cm, e, ch) {

return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })

}

var lastStoppedKey = null function onKeyDown(e) {

var cm = this
cm.curOp.focus = activeElt()
if (signalDOMEvent(cm, e)) { return }
// IE does strange things with escape.
if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false }
var code = e.keyCode
cm.display.shift = code == 16 || e.shiftKey
var handled = handleKeyBinding(cm, e)
if (presto) {
  lastStoppedKey = handled ? code : null
  // Opera has no cut event... we try to at least catch the key combo
  if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
    { cm.replaceSelection("", null, "cut") }
}

// Turn mouse into crosshair when Alt is held on Mac.
if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
  { showCrossHair(cm) }

}

function showCrossHair(cm) {

var lineDiv = cm.display.lineDiv
addClass(lineDiv, "CodeMirror-crosshair")

function up(e) {
  if (e.keyCode == 18 || !e.altKey) {
    rmClass(lineDiv, "CodeMirror-crosshair")
    off(document, "keyup", up)
    off(document, "mouseover", up)
  }
}
on(document, "keyup", up)
on(document, "mouseover", up)

}

function onKeyUp(e) {

if (e.keyCode == 16) { this.doc.sel.shift = false }
signalDOMEvent(this, e)

}

function onKeyPress(e) {

var cm = this
if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
var keyCode = e.keyCode, charCode = e.charCode
if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
var ch = String.fromCharCode(charCode == null ? keyCode : charCode)
// Some browsers fire keypress events for backspace
if (ch == "\x08") { return }
if (handleCharBinding(cm, e, ch)) { return }
cm.display.input.onKeyPress(e)

}

// A mouse down can be a single click, double click, triple click, // start of selection drag, start of text drag, new cursor // (ctrl-click), rectangle drag (alt-drag), or xwin // middle-click-paste. Or it might be a click on something we should // not interfere with, such as a scrollbar or widget. function onMouseDown(e) {

var cm = this, display = cm.display
if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
display.shift = e.shiftKey

if (eventInWidget(display, e)) {
  if (!webkit) {
    // Briefly turn off draggability, to allow widgets to do
    // normal dragging things.
    display.scroller.draggable = false
    setTimeout(function () { return display.scroller.draggable = true; }, 100)
  }
  return
}
if (clickInGutter(cm, e)) { return }
var start = posFromMouse(cm, e)
window.focus()

switch (e_button(e)) {
case 1:
  // #3261: make sure, that we're not starting a second selection
  if (cm.state.selectingText)
    { cm.state.selectingText(e) }
  else if (start)
    { leftButtonDown(cm, e, start) }
  else if (e_target(e) == display.scroller)
    { e_preventDefault(e) }
  break
case 2:
  if (webkit) { cm.state.lastMiddleDown = +new Date }
  if (start) { extendSelection(cm.doc, start) }
  setTimeout(function () { return display.input.focus(); }, 20)
  e_preventDefault(e)
  break
case 3:
  if (captureRightClick) { onContextMenu(cm, e) }
  else { delayBlurEvent(cm) }
  break
}

}

var lastClick; var lastDoubleClick function leftButtonDown(cm, e, start) {

if (ie) { setTimeout(bind(ensureFocus, cm), 0) }
else { cm.curOp.focus = activeElt() }

var now = +new Date, type
if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) {
  type = "triple"
} else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) {
  type = "double"
  lastDoubleClick = {time: now, pos: start}
} else {
  type = "single"
  lastClick = {time: now, pos: start}
}

var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained
if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
    type == "single" && (contained = sel.contains(start)) > -1 &&
    (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) &&
    (cmp(contained.to(), start) > 0 || start.xRel < 0))
  { leftButtonStartDrag(cm, e, start, modifier) }
else
  { leftButtonSelect(cm, e, start, type, modifier) }

}

// Start a text drag. When it ends, see if any dragging actually // happen, and treat as a click if it didn't. function leftButtonStartDrag(cm, e, start, modifier) {

var display = cm.display, startTime = +new Date
var dragEnd = operation(cm, function (e2) {
  if (webkit) { display.scroller.draggable = false }
  cm.state.draggingText = false
  off(document, "mouseup", dragEnd)
  off(display.scroller, "drop", dragEnd)
  if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
    e_preventDefault(e2)
    if (!modifier && +new Date - 200 < startTime)
      { extendSelection(cm.doc, start) }
    // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
    if (webkit || ie && ie_version == 9)
      { setTimeout(function () {document.body.focus(); display.input.focus()}, 20) }
    else
      { display.input.focus() }
  }
})
// Let the drag handler handle this.
if (webkit) { display.scroller.draggable = true }
cm.state.draggingText = dragEnd
dragEnd.copy = mac ? e.altKey : e.ctrlKey
// IE's approach to draggable
if (display.scroller.dragDrop) { display.scroller.dragDrop() }
on(document, "mouseup", dragEnd)
on(display.scroller, "drop", dragEnd)

}

// Normal selection, as opposed to text dragging. function leftButtonSelect(cm, e, start, type, addNew) {

var display = cm.display, doc = cm.doc
e_preventDefault(e)

var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
if (addNew && !e.shiftKey) {
  ourIndex = doc.sel.contains(start)
  if (ourIndex > -1)
    { ourRange = ranges[ourIndex] }
  else
    { ourRange = new Range(start, start) }
} else {
  ourRange = doc.sel.primary()
  ourIndex = doc.sel.primIndex
}

if (chromeOS ? e.shiftKey && e.metaKey : e.altKey) {
  type = "rect"
  if (!addNew) { ourRange = new Range(start, start) }
  start = posFromMouse(cm, e, true, true)
  ourIndex = -1
} else if (type == "double") {
  var word = cm.findWordAt(start)
  if (cm.display.shift || doc.extend)
    { ourRange = extendRange(doc, ourRange, word.anchor, word.head) }
  else
    { ourRange = word }
} else if (type == "triple") {
  var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)))
  if (cm.display.shift || doc.extend)
    { ourRange = extendRange(doc, ourRange, line.anchor, line.head) }
  else
    { ourRange = line }
} else {
  ourRange = extendRange(doc, ourRange, start)
}

if (!addNew) {
  ourIndex = 0
  setSelection(doc, new Selection([ourRange], 0), sel_mouse)
  startSel = doc.sel
} else if (ourIndex == -1) {
  ourIndex = ranges.length
  setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
               {scroll: false, origin: "*mouse"})
} else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) {
  setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
               {scroll: false, origin: "*mouse"})
  startSel = doc.sel
} else {
  replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)
}

var lastPos = start
function extendTo(pos) {
  if (cmp(lastPos, pos) == 0) { return }
  lastPos = pos

  if (type == "rect") {
    var ranges = [], tabSize = cm.options.tabSize
    var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
    var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
    var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
    for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
         line <= end; line++) {
      var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
      if (left == right)
        { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))) }
      else if (text.length > leftPos)
        { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))) }
    }
    if (!ranges.length) { ranges.push(new Range(start, start)) }
    setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
                 {origin: "*mouse", scroll: false})
    cm.scrollIntoView(pos)
  } else {
    var oldRange = ourRange
    var anchor = oldRange.anchor, head = pos
    if (type != "single") {
      var range$$1
      if (type == "double")
        { range$$1 = cm.findWordAt(pos) }
      else
        { range$$1 = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0))) }
      if (cmp(range$$1.anchor, anchor) > 0) {
        head = range$$1.head
        anchor = minPos(oldRange.from(), range$$1.anchor)
      } else {
        head = range$$1.anchor
        anchor = maxPos(oldRange.to(), range$$1.head)
      }
    }
    var ranges$1 = startSel.ranges.slice(0)
    ranges$1[ourIndex] = new Range(clipPos(doc, anchor), head)
    setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse)
  }
}

var editorSize = display.wrapper.getBoundingClientRect()
// Used to ensure timeout re-tries don't fire when another extend
// happened in the meantime (clearTimeout isn't reliable -- at
// least on Chrome, the timeouts still happen even when cleared,
// if the clear happens after their scheduled firing time).
var counter = 0

function extend(e) {
  var curCount = ++counter
  var cur = posFromMouse(cm, e, true, type == "rect")
  if (!cur) { return }
  if (cmp(cur, lastPos) != 0) {
    cm.curOp.focus = activeElt()
    extendTo(cur)
    var visible = visibleLines(display, doc)
    if (cur.line >= visible.to || cur.line < visible.from)
      { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e) }}), 150) }
  } else {
    var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
    if (outside) { setTimeout(operation(cm, function () {
      if (counter != curCount) { return }
      display.scroller.scrollTop += outside
      extend(e)
    }), 50) }
  }
}

function done(e) {
  cm.state.selectingText = false
  counter = Infinity
  e_preventDefault(e)
  display.input.focus()
  off(document, "mousemove", move)
  off(document, "mouseup", up)
  doc.history.lastSelOrigin = null
}

var move = operation(cm, function (e) {
  if (!e_button(e)) { done(e) }
  else { extend(e) }
})
var up = operation(cm, done)
cm.state.selectingText = up
on(document, "mousemove", move)
on(document, "mouseup", up)

}

// Determines whether an event happened in the gutter, and fires the // handlers for the corresponding event. function gutterEvent(cm, e, type, prevent) {

var mX, mY
try { mX = e.clientX; mY = e.clientY }
catch(e) { return false }
if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
if (prevent) { e_preventDefault(e) }

var display = cm.display
var lineBox = display.lineDiv.getBoundingClientRect()

if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
mY -= lineBox.top - display.viewOffset

for (var i = 0; i < cm.options.gutters.length; ++i) {
  var g = display.gutters.childNodes[i]
  if (g && g.getBoundingClientRect().right >= mX) {
    var line = lineAtHeight(cm.doc, mY)
    var gutter = cm.options.gutters[i]
    signal(cm, type, cm, line, gutter, e)
    return e_defaultPrevented(e)
  }
}

}

function clickInGutter(cm, e) {

return gutterEvent(cm, e, "gutterClick", true)

}

// CONTEXT MENU HANDLING

// To make the context menu work, we need to briefly unhide the // textarea (making it as unobtrusive as possible) to let the // right-click take effect on it. function onContextMenu(cm, e) {

if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
if (signalDOMEvent(cm, e, "contextmenu")) { return }
cm.display.input.onContextMenu(e)

}

function contextMenuInGutter(cm, e) {

if (!hasHandler(cm, "gutterContextMenu")) { return false }
return gutterEvent(cm, e, "gutterContextMenu", false)

}

function themeChanged(cm) {

cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
  cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-")
clearCaches(cm)

}

var Init = {toString: function(){return “CodeMirror.Init”}}

var defaults = {} var optionHandlers = {}

function defineOptions(CodeMirror) {

var optionHandlers = CodeMirror.optionHandlers

function option(name, deflt, handle, notOnInit) {
  CodeMirror.defaults[name] = deflt
  if (handle) { optionHandlers[name] =
    notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old) }} : handle }
}

CodeMirror.defineOption = option

// Passed to option handlers when there is no old value.
CodeMirror.Init = Init

// These two are, on init, called from the constructor because they
// have to be initialized before the editor can start at all.
option("value", "", function (cm, val) { return cm.setValue(val); }, true)
option("mode", null, function (cm, val) {
  cm.doc.modeOption = val
  loadMode(cm)
}, true)

option("indentUnit", 2, loadMode, true)
option("indentWithTabs", false)
option("smartIndent", true)
option("tabSize", 4, function (cm) {
  resetModeState(cm)
  clearCaches(cm)
  regChange(cm)
}, true)
option("lineSeparator", null, function (cm, val) {
  cm.doc.lineSep = val
  if (!val) { return }
  var newBreaks = [], lineNo = cm.doc.first
  cm.doc.iter(function (line) {
    for (var pos = 0;;) {
      var found = line.text.indexOf(val, pos)
      if (found == -1) { break }
      pos = found + val.length
      newBreaks.push(Pos(lineNo, found))
    }
    lineNo++
  })
  for (var i = newBreaks.length - 1; i >= 0; i--)
    { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }
})
option("specialChars", /[\u0000-\u001f\u007f\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
  cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g")
  if (old != Init) { cm.refresh() }
})
option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true)
option("electricChars", true)
option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
  throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
}, true)
option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true)
option("rtlMoveVisually", !windows)
option("wholeLineUpdateBefore", true)

option("theme", "default", function (cm) {
  themeChanged(cm)
  guttersChanged(cm)
}, true)
option("keyMap", "default", function (cm, val, old) {
  var next = getKeyMap(val)
  var prev = old != Init && getKeyMap(old)
  if (prev && prev.detach) { prev.detach(cm, next) }
  if (next.attach) { next.attach(cm, prev || null) }
})
option("extraKeys", null)

option("lineWrapping", false, wrappingChanged, true)
option("gutters", [], function (cm) {
  setGuttersForLineNumbers(cm.options)
  guttersChanged(cm)
}, true)
option("fixedGutter", true, function (cm, val) {
  cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"
  cm.refresh()
}, true)
option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true)
option("scrollbarStyle", "native", function (cm) {
  initScrollbars(cm)
  updateScrollbars(cm)
  cm.display.scrollbars.setScrollTop(cm.doc.scrollTop)
  cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft)
}, true)
option("lineNumbers", false, function (cm) {
  setGuttersForLineNumbers(cm.options)
  guttersChanged(cm)
}, true)
option("firstLineNumber", 1, guttersChanged, true)
option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true)
option("showCursorWhenSelecting", false, updateSelection, true)

option("resetSelectionOnContextMenu", true)
option("lineWiseCopyCut", true)

option("readOnly", false, function (cm, val) {
  if (val == "nocursor") {
    onBlur(cm)
    cm.display.input.blur()
    cm.display.disabled = true
  } else {
    cm.display.disabled = false
  }
  cm.display.input.readOnlyChanged(val)
})
option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset() }}, true)
option("dragDrop", true, dragDropChanged)
option("allowDropFileTypes", null)

option("cursorBlinkRate", 530)
option("cursorScrollMargin", 0)
option("cursorHeight", 1, updateSelection, true)
option("singleCursorHeightPerLine", true, updateSelection, true)
option("workTime", 100)
option("workDelay", 100)
option("flattenSpans", true, resetModeState, true)
option("addModeClass", false, resetModeState, true)
option("pollInterval", 100)
option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; })
option("historyEventDelay", 1250)
option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true)
option("maxHighlightLength", 10000, resetModeState, true)
option("moveInputWithCursor", true, function (cm, val) {
  if (!val) { cm.display.input.resetPosition() }
})

option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; })
option("autofocus", null)

}

function guttersChanged(cm) {

updateGutters(cm)
regChange(cm)
setTimeout(function () { return alignHorizontally(cm); }, 20)

}

function dragDropChanged(cm, value, old) {

var wasOn = old && old != Init
if (!value != !wasOn) {
  var funcs = cm.display.dragFunctions
  var toggle = value ? on : off
  toggle(cm.display.scroller, "dragstart", funcs.start)
  toggle(cm.display.scroller, "dragenter", funcs.enter)
  toggle(cm.display.scroller, "dragover", funcs.over)
  toggle(cm.display.scroller, "dragleave", funcs.leave)
  toggle(cm.display.scroller, "drop", funcs.drop)
}

}

function wrappingChanged(cm) {

if (cm.options.lineWrapping) {
  addClass(cm.display.wrapper, "CodeMirror-wrap")
  cm.display.sizer.style.minWidth = ""
  cm.display.sizerWidth = null
} else {
  rmClass(cm.display.wrapper, "CodeMirror-wrap")
  findMaxLine(cm)
}
estimateLineHeights(cm)
regChange(cm)
clearCaches(cm)
setTimeout(function () { return updateScrollbars(cm); }, 100)

}

// A CodeMirror instance represents an editor. This is the object // that user code is usually dealing with.

function CodeMirror$1(place, options) {

var this$1 = this;

if (!(this instanceof CodeMirror$1)) { return new CodeMirror$1(place, options) }

this.options = options = options ? copyObj(options) : {}
// Determine effective options based on given values and defaults.
copyObj(defaults, options, false)
setGuttersForLineNumbers(options)

var doc = options.value
if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator) }
this.doc = doc

var input = new CodeMirror$1.inputStyles[options.inputStyle](this)
var display = this.display = new Display(place, doc, input)
display.wrapper.CodeMirror = this
updateGutters(this)
themeChanged(this)
if (options.lineWrapping)
  { this.display.wrapper.className += " CodeMirror-wrap" }
if (options.autofocus && !mobile) { display.input.focus() }
initScrollbars(this)

this.state = {
  keyMaps: [],  // stores maps added by addKeyMap
  overlays: [], // highlighting overlays, as added by addOverlay
  modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
  overwrite: false,
  delayingBlurEvent: false,
  focused: false,
  suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
  pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
  selectingText: false,
  draggingText: false,
  highlight: new Delayed(), // stores highlight worker timeout
  keySeq: null,  // Unfinished key sequence
  specialChars: null
}

// Override magic textarea content restore that IE sometimes does
// on our hidden textarea on reload
if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20) }

registerEventHandlers(this)
ensureGlobalHandlers()

startOperation(this)
this.curOp.forceUpdate = true
attachDoc(this, doc)

if ((options.autofocus && !mobile) || this.hasFocus())
  { setTimeout(bind(onFocus, this), 20) }
else
  { onBlur(this) }

for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
  { optionHandlers[opt](this$1, options[opt], Init) } }
maybeUpdateLineNumberWidth(this)
if (options.finishInit) { options.finishInit(this) }
for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1) }
endOperation(this)
// Suppress optimizelegibility in Webkit, since it breaks text
// measuring on line wrapping boundaries.
if (webkit && options.lineWrapping &&
    getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
  { display.lineDiv.style.textRendering = "auto" }

}

// The default configuration options. CodeMirror$1.defaults = defaults // Functions to run when options are changed. CodeMirror$1.optionHandlers = optionHandlers

// Attach the necessary event handlers when initializing the editor function registerEventHandlers(cm) {

var d = cm.display
on(d.scroller, "mousedown", operation(cm, onMouseDown))
// Older IE's will not fire a second mousedown for a double click
if (ie && ie_version < 11)
  { on(d.scroller, "dblclick", operation(cm, function (e) {
    if (signalDOMEvent(cm, e)) { return }
    var pos = posFromMouse(cm, e)
    if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
    e_preventDefault(e)
    var word = cm.findWordAt(pos)
    extendSelection(cm.doc, word.anchor, word.head)
  })) }
else
  { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }) }
// Some browsers fire contextmenu *after* opening the menu, at
// which point we can't mess with it anymore. Context menu is
// handled in onMouseDown for these browsers.
if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }) }

// Used to suppress mouse event handling when a touch happens
var touchFinished, prevTouch = {end: 0}
function finishTouch() {
  if (d.activeTouch) {
    touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000)
    prevTouch = d.activeTouch
    prevTouch.end = +new Date
  }
}
function isMouseLikeTouchEvent(e) {
  if (e.touches.length != 1) { return false }
  var touch = e.touches[0]
  return touch.radiusX <= 1 && touch.radiusY <= 1
}
function farAway(touch, other) {
  if (other.left == null) { return true }
  var dx = other.left - touch.left, dy = other.top - touch.top
  return dx * dx + dy * dy > 20 * 20
}
on(d.scroller, "touchstart", function (e) {
  if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
    clearTimeout(touchFinished)
    var now = +new Date
    d.activeTouch = {start: now, moved: false,
                     prev: now - prevTouch.end <= 300 ? prevTouch : null}
    if (e.touches.length == 1) {
      d.activeTouch.left = e.touches[0].pageX
      d.activeTouch.top = e.touches[0].pageY
    }
  }
})
on(d.scroller, "touchmove", function () {
  if (d.activeTouch) { d.activeTouch.moved = true }
})
on(d.scroller, "touchend", function (e) {
  var touch = d.activeTouch
  if (touch && !eventInWidget(d, e) && touch.left != null &&
      !touch.moved && new Date - touch.start < 300) {
    var pos = cm.coordsChar(d.activeTouch, "page"), range
    if (!touch.prev || farAway(touch, touch.prev)) // Single tap
      { range = new Range(pos, pos) }
    else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
      { range = cm.findWordAt(pos) }
    else // Triple tap
      { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
    cm.setSelection(range.anchor, range.head)
    cm.focus()
    e_preventDefault(e)
  }
  finishTouch()
})
on(d.scroller, "touchcancel", finishTouch)

// Sync scrolling between fake scrollbars and real scrollable
// area, ensure viewport is updated when scrolling.
on(d.scroller, "scroll", function () {
  if (d.scroller.clientHeight) {
    setScrollTop(cm, d.scroller.scrollTop)
    setScrollLeft(cm, d.scroller.scrollLeft, true)
    signal(cm, "scroll", cm)
  }
})

// Listen to wheel events in order to try and update the viewport on time.
on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); })
on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); })

// Prevent wrapper from ever scrolling
on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; })

d.dragFunctions = {
  enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e) }},
  over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
  start: function (e) { return onDragStart(cm, e); },
  drop: operation(cm, onDrop),
  leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}
}

var inp = d.input.getField()
on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); })
on(inp, "keydown", operation(cm, onKeyDown))
on(inp, "keypress", operation(cm, onKeyPress))
on(inp, "focus", function (e) { return onFocus(cm, e); })
on(inp, "blur", function (e) { return onBlur(cm, e); })

}

var initHooks = [] CodeMirror$1.defineInitHook = function (f) { return initHooks.push(f); }

// Indent the given line. The how parameter can be “smart”, // “add”/null, “subtract”, or “prev”. When aggressive is false // (typically set to true for forced single-line indents), empty // lines are not indented, and places where the mode returns Pass // are left alone. function indentLine(cm, n, how, aggressive) {

var doc = cm.doc, state
if (how == null) { how = "add" }
if (how == "smart") {
  // Fall back to "prev" when the mode doesn't have an indentation
  // method.
  if (!doc.mode.indent) { how = "prev" }
  else { state = getStateBefore(cm, n) }
}

var tabSize = cm.options.tabSize
var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
if (line.stateAfter) { line.stateAfter = null }
var curSpaceString = line.text.match(/^\s*/)[0], indentation
if (!aggressive && !/\S/.test(line.text)) {
  indentation = 0
  how = "not"
} else if (how == "smart") {
  indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
  if (indentation == Pass || indentation > 150) {
    if (!aggressive) { return }
    how = "prev"
  }
}
if (how == "prev") {
  if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize) }
  else { indentation = 0 }
} else if (how == "add") {
  indentation = curSpace + cm.options.indentUnit
} else if (how == "subtract") {
  indentation = curSpace - cm.options.indentUnit
} else if (typeof how == "number") {
  indentation = curSpace + how
}
indentation = Math.max(0, indentation)

var indentString = "", pos = 0
if (cm.options.indentWithTabs)
  { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"} }
if (pos < indentation) { indentString += spaceStr(indentation - pos) }

if (indentString != curSpaceString) {
  replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
  line.stateAfter = null
  return true
} else {
  // Ensure that, if the cursor was in the whitespace at the start
  // of the line, it is moved to the end of that space.
  for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
    var range = doc.sel.ranges[i$1]
    if (range.head.line == n && range.head.ch < curSpaceString.length) {
      var pos$1 = Pos(n, curSpaceString.length)
      replaceOneSelection(doc, i$1, new Range(pos$1, pos$1))
      break
    }
  }
}

}

// This will be set to a {lineWise: bool, text: [string]} object, so // that, when pasting, we know what kind of selections the copied // text was made out of. var lastCopied = null

function setLastCopied(newLastCopied) {

lastCopied = newLastCopied

}

function applyTextInput(cm, inserted, deleted, sel, origin) {

var doc = cm.doc
cm.display.shift = false
if (!sel) { sel = doc.sel }

var paste = cm.state.pasteIncoming || origin == "paste"
var textLines = splitLinesAuto(inserted), multiPaste = null
// When pasing N lines into N selections, insert one line per selection
if (paste && sel.ranges.length > 1) {
  if (lastCopied && lastCopied.text.join("\n") == inserted) {
    if (sel.ranges.length % lastCopied.text.length == 0) {
      multiPaste = []
      for (var i = 0; i < lastCopied.text.length; i++)
        { multiPaste.push(doc.splitLines(lastCopied.text[i])) }
    }
  } else if (textLines.length == sel.ranges.length) {
    multiPaste = map(textLines, function (l) { return [l]; })
  }
}

var updateInput
// Normal behavior is to insert the new text into every selection
for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
  var range$$1 = sel.ranges[i$1]
  var from = range$$1.from(), to = range$$1.to()
  if (range$$1.empty()) {
    if (deleted && deleted > 0) // Handle deletion
      { from = Pos(from.line, from.ch - deleted) }
    else if (cm.state.overwrite && !paste) // Handle overwrite
      { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)) }
    else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
      { from = to = Pos(from.line, 0) }
  }
  updateInput = cm.curOp.updateInput
  var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
                     origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}
  makeChange(cm.doc, changeEvent)
  signalLater(cm, "inputRead", cm, changeEvent)
}
if (inserted && !paste)
  { triggerElectric(cm, inserted) }

ensureCursorVisible(cm)
cm.curOp.updateInput = updateInput
cm.curOp.typing = true
cm.state.pasteIncoming = cm.state.cutIncoming = false

}

function handlePaste(e, cm) {

var pasted = e.clipboardData && e.clipboardData.getData("Text")
if (pasted) {
  e.preventDefault()
  if (!cm.isReadOnly() && !cm.options.disableInput)
    { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }) }
  return true
}

}

function triggerElectric(cm, inserted) {

// When an 'electric' character is inserted, immediately trigger a reindent
if (!cm.options.electricChars || !cm.options.smartIndent) { return }
var sel = cm.doc.sel

for (var i = sel.ranges.length - 1; i >= 0; i--) {
  var range$$1 = sel.ranges[i]
  if (range$$1.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range$$1.head.line)) { continue }
  var mode = cm.getModeAt(range$$1.head)
  var indented = false
  if (mode.electricChars) {
    for (var j = 0; j < mode.electricChars.length; j++)
      { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
        indented = indentLine(cm, range$$1.head.line, "smart")
        break
      } }
  } else if (mode.electricInput) {
    if (mode.electricInput.test(getLine(cm.doc, range$$1.head.line).text.slice(0, range$$1.head.ch)))
      { indented = indentLine(cm, range$$1.head.line, "smart") }
  }
  if (indented) { signalLater(cm, "electricInput", cm, range$$1.head.line) }
}

}

function copyableRanges(cm) {

var text = [], ranges = []
for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
  var line = cm.doc.sel.ranges[i].head.line
  var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
  ranges.push(lineRange)
  text.push(cm.getRange(lineRange.anchor, lineRange.head))
}
return {text: text, ranges: ranges}

}

function disableBrowserMagic(field, spellcheck) {

field.setAttribute("autocorrect", "off")
field.setAttribute("autocapitalize", "off")
field.setAttribute("spellcheck", !!spellcheck)

}

function hiddenTextarea() {

var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none")
var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
// The textarea is kept positioned near the cursor to prevent the
// fact that it'll be scrolled into view on input from scrolling
// our fake cursor out of view. On webkit, when wrap=off, paste is
// very slow. So make the area wide instead.
if (webkit) { te.style.width = "1000px" }
else { te.setAttribute("wrap", "off") }
// If border: 0; -- iOS fails to open keyboard (issue #1287)
if (ios) { te.style.border = "1px solid black" }
disableBrowserMagic(te)
return div

}

// The publicly visible API. Note that methodOp(f) means // 'wrap f in an operation, performed on its `this` parameter'.

// This is not the complete set of editor methods. Most of the // methods defined on the Doc type are also injected into // CodeMirror.prototype, for backwards compatibility and // convenience.

var addEditorMethods = function(CodeMirror) {

var optionHandlers = CodeMirror.optionHandlers

var helpers = CodeMirror.helpers = {}

CodeMirror.prototype = {
  constructor: CodeMirror,
  focus: function(){window.focus(); this.display.input.focus()},

  setOption: function(option, value) {
    var options = this.options, old = options[option]
    if (options[option] == value && option != "mode") { return }
    options[option] = value
    if (optionHandlers.hasOwnProperty(option))
      { operation(this, optionHandlers[option])(this, value, old) }
  },

  getOption: function(option) {return this.options[option]},
  getDoc: function() {return this.doc},

  addKeyMap: function(map$$1, bottom) {
    this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map$$1))
  },
  removeKeyMap: function(map$$1) {
    var maps = this.state.keyMaps
    for (var i = 0; i < maps.length; ++i)
      { if (maps[i] == map$$1 || maps[i].name == map$$1) {
        maps.splice(i, 1)
        return true
      } }
  },

  addOverlay: methodOp(function(spec, options) {
    var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec)
    if (mode.startState) { throw new Error("Overlays may not be stateful.") }
    insertSorted(this.state.overlays,
                 {mode: mode, modeSpec: spec, opaque: options && options.opaque,
                  priority: (options && options.priority) || 0},
                 function (overlay) { return overlay.priority; })
    this.state.modeGen++
    regChange(this)
  }),
  removeOverlay: methodOp(function(spec) {
    var this$1 = this;

    var overlays = this.state.overlays
    for (var i = 0; i < overlays.length; ++i) {
      var cur = overlays[i].modeSpec
      if (cur == spec || typeof spec == "string" && cur.name == spec) {
        overlays.splice(i, 1)
        this$1.state.modeGen++
        regChange(this$1)
        return
      }
    }
  }),

  indentLine: methodOp(function(n, dir, aggressive) {
    if (typeof dir != "string" && typeof dir != "number") {
      if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev" }
      else { dir = dir ? "add" : "subtract" }
    }
    if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive) }
  }),
  indentSelection: methodOp(function(how) {
    var this$1 = this;

    var ranges = this.doc.sel.ranges, end = -1
    for (var i = 0; i < ranges.length; i++) {
      var range$$1 = ranges[i]
      if (!range$$1.empty()) {
        var from = range$$1.from(), to = range$$1.to()
        var start = Math.max(end, from.line)
        end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1
        for (var j = start; j < end; ++j)
          { indentLine(this$1, j, how) }
        var newRanges = this$1.doc.sel.ranges
        if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
          { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll) }
      } else if (range$$1.head.line > end) {
        indentLine(this$1, range$$1.head.line, how, true)
        end = range$$1.head.line
        if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1) }
      }
    }
  }),

  // Fetch the parser token for a given character. Useful for hacks
  // that want to inspect the mode state (say, for completion).
  getTokenAt: function(pos, precise) {
    return takeToken(this, pos, precise)
  },

  getLineTokens: function(line, precise) {
    return takeToken(this, Pos(line), precise, true)
  },

  getTokenTypeAt: function(pos) {
    pos = clipPos(this.doc, pos)
    var styles = getLineStyles(this, getLine(this.doc, pos.line))
    var before = 0, after = (styles.length - 1) / 2, ch = pos.ch
    var type
    if (ch == 0) { type = styles[2] }
    else { for (;;) {
      var mid = (before + after) >> 1
      if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid }
      else if (styles[mid * 2 + 1] < ch) { before = mid + 1 }
      else { type = styles[mid * 2 + 2]; break }
    } }
    var cut = type ? type.indexOf("overlay ") : -1
    return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
  },

  getModeAt: function(pos) {
    var mode = this.doc.mode
    if (!mode.innerMode) { return mode }
    return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
  },

  getHelper: function(pos, type) {
    return this.getHelpers(pos, type)[0]
  },

  getHelpers: function(pos, type) {
    var this$1 = this;

    var found = []
    if (!helpers.hasOwnProperty(type)) { return found }
    var help = helpers[type], mode = this.getModeAt(pos)
    if (typeof mode[type] == "string") {
      if (help[mode[type]]) { found.push(help[mode[type]]) }
    } else if (mode[type]) {
      for (var i = 0; i < mode[type].length; i++) {
        var val = help[mode[type][i]]
        if (val) { found.push(val) }
      }
    } else if (mode.helperType && help[mode.helperType]) {
      found.push(help[mode.helperType])
    } else if (help[mode.name]) {
      found.push(help[mode.name])
    }
    for (var i$1 = 0; i$1 < help._global.length; i$1++) {
      var cur = help._global[i$1]
      if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
        { found.push(cur.val) }
    }
    return found
  },

  getStateAfter: function(line, precise) {
    var doc = this.doc
    line = clipLine(doc, line == null ? doc.first + doc.size - 1: line)
    return getStateBefore(this, line + 1, precise)
  },

  cursorCoords: function(start, mode) {
    var pos, range$$1 = this.doc.sel.primary()
    if (start == null) { pos = range$$1.head }
    else if (typeof start == "object") { pos = clipPos(this.doc, start) }
    else { pos = start ? range$$1.from() : range$$1.to() }
    return cursorCoords(this, pos, mode || "page")
  },

  charCoords: function(pos, mode) {
    return charCoords(this, clipPos(this.doc, pos), mode || "page")
  },

  coordsChar: function(coords, mode) {
    coords = fromCoordSystem(this, coords, mode || "page")
    return coordsChar(this, coords.left, coords.top)
  },

  lineAtHeight: function(height, mode) {
    height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
    return lineAtHeight(this.doc, height + this.display.viewOffset)
  },
  heightAtLine: function(line, mode) {
    var end = false, lineObj
    if (typeof line == "number") {
      var last = this.doc.first + this.doc.size - 1
      if (line < this.doc.first) { line = this.doc.first }
      else if (line > last) { line = last; end = true }
      lineObj = getLine(this.doc, line)
    } else {
      lineObj = line
    }
    return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top +
      (end ? this.doc.height - heightAtLine(lineObj) : 0)
  },

  defaultTextHeight: function() { return textHeight(this.display) },
  defaultCharWidth: function() { return charWidth(this.display) },

  setGutterMarker: methodOp(function(line, gutterID, value) {
    return changeLine(this.doc, line, "gutter", function (line) {
      var markers = line.gutterMarkers || (line.gutterMarkers = {})
      markers[gutterID] = value
      if (!value && isEmpty(markers)) { line.gutterMarkers = null }
      return true
    })
  }),

  clearGutter: methodOp(function(gutterID) {
    var this$1 = this;

    var doc = this.doc, i = doc.first
    doc.iter(function (line) {
      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
        line.gutterMarkers[gutterID] = null
        regLineChange(this$1, i, "gutter")
        if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null }
      }
      ++i
    })
  }),

  lineInfo: function(line) {
    var n
    if (typeof line == "number") {
      if (!isLine(this.doc, line)) { return null }
      n = line
      line = getLine(this.doc, line)
      if (!line) { return null }
    } else {
      n = lineNo(line)
      if (n == null) { return null }
    }
    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
            widgets: line.widgets}
  },

  getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},

  addWidget: function(pos, node, scroll, vert, horiz) {
    var display = this.display
    pos = cursorCoords(this, clipPos(this.doc, pos))
    var top = pos.bottom, left = pos.left
    node.style.position = "absolute"
    node.setAttribute("cm-ignore-events", "true")
    this.display.input.setUneditable(node)
    display.sizer.appendChild(node)
    if (vert == "over") {
      top = pos.top
    } else if (vert == "above" || vert == "near") {
      var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
      hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth)
      // Default to positioning above (if specified and possible); otherwise default to positioning below
      if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
        { top = pos.top - node.offsetHeight }
      else if (pos.bottom + node.offsetHeight <= vspace)
        { top = pos.bottom }
      if (left + node.offsetWidth > hspace)
        { left = hspace - node.offsetWidth }
    }
    node.style.top = top + "px"
    node.style.left = node.style.right = ""
    if (horiz == "right") {
      left = display.sizer.clientWidth - node.offsetWidth
      node.style.right = "0px"
    } else {
      if (horiz == "left") { left = 0 }
      else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2 }
      node.style.left = left + "px"
    }
    if (scroll)
      { scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight) }
  },

  triggerOnKeyDown: methodOp(onKeyDown),
  triggerOnKeyPress: methodOp(onKeyPress),
  triggerOnKeyUp: onKeyUp,

  execCommand: function(cmd) {
    if (commands.hasOwnProperty(cmd))
      { return commands[cmd].call(null, this) }
  },

  triggerElectric: methodOp(function(text) { triggerElectric(this, text) }),

  findPosH: function(from, amount, unit, visually) {
    var this$1 = this;

    var dir = 1
    if (amount < 0) { dir = -1; amount = -amount }
    var cur = clipPos(this.doc, from)
    for (var i = 0; i < amount; ++i) {
      cur = findPosH(this$1.doc, cur, dir, unit, visually)
      if (cur.hitSide) { break }
    }
    return cur
  },

  moveH: methodOp(function(dir, unit) {
    var this$1 = this;

    this.extendSelectionsBy(function (range$$1) {
      if (this$1.display.shift || this$1.doc.extend || range$$1.empty())
        { return findPosH(this$1.doc, range$$1.head, dir, unit, this$1.options.rtlMoveVisually) }
      else
        { return dir < 0 ? range$$1.from() : range$$1.to() }
    }, sel_move)
  }),

  deleteH: methodOp(function(dir, unit) {
    var sel = this.doc.sel, doc = this.doc
    if (sel.somethingSelected())
      { doc.replaceSelection("", null, "+delete") }
    else
      { deleteNearSelection(this, function (range$$1) {
        var other = findPosH(doc, range$$1.head, dir, unit, false)
        return dir < 0 ? {from: other, to: range$$1.head} : {from: range$$1.head, to: other}
      }) }
  }),

  findPosV: function(from, amount, unit, goalColumn) {
    var this$1 = this;

    var dir = 1, x = goalColumn
    if (amount < 0) { dir = -1; amount = -amount }
    var cur = clipPos(this.doc, from)
    for (var i = 0; i < amount; ++i) {
      var coords = cursorCoords(this$1, cur, "div")
      if (x == null) { x = coords.left }
      else { coords.left = x }
      cur = findPosV(this$1, coords, dir, unit)
      if (cur.hitSide) { break }
    }
    return cur
  },

  moveV: methodOp(function(dir, unit) {
    var this$1 = this;

    var doc = this.doc, goals = []
    var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected()
    doc.extendSelectionsBy(function (range$$1) {
      if (collapse)
        { return dir < 0 ? range$$1.from() : range$$1.to() }
      var headPos = cursorCoords(this$1, range$$1.head, "div")
      if (range$$1.goalColumn != null) { headPos.left = range$$1.goalColumn }
      goals.push(headPos.left)
      var pos = findPosV(this$1, headPos, dir, unit)
      if (unit == "page" && range$$1 == doc.sel.primary())
        { addToScrollPos(this$1, null, charCoords(this$1, pos, "div").top - headPos.top) }
      return pos
    }, sel_move)
    if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
      { doc.sel.ranges[i].goalColumn = goals[i] } }
  }),

  // Find the word at the given position (as returned by coordsChar).
  findWordAt: function(pos) {
    var doc = this.doc, line = getLine(doc, pos.line).text
    var start = pos.ch, end = pos.ch
    if (line) {
      var helper = this.getHelper(pos, "wordChars")
      if ((pos.xRel < 0 || end == line.length) && start) { --start; } else { ++end }
      var startChar = line.charAt(start)
      var check = isWordChar(startChar, helper)
        ? function (ch) { return isWordChar(ch, helper); }
        : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
        : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); }
      while (start > 0 && check(line.charAt(start - 1))) { --start }
      while (end < line.length && check(line.charAt(end))) { ++end }
    }
    return new Range(Pos(pos.line, start), Pos(pos.line, end))
  },

  toggleOverwrite: function(value) {
    if (value != null && value == this.state.overwrite) { return }
    if (this.state.overwrite = !this.state.overwrite)
      { addClass(this.display.cursorDiv, "CodeMirror-overwrite") }
    else
      { rmClass(this.display.cursorDiv, "CodeMirror-overwrite") }

    signal(this, "overwriteToggle", this, this.state.overwrite)
  },
  hasFocus: function() { return this.display.input.getField() == activeElt() },
  isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },

  scrollTo: methodOp(function(x, y) {
    if (x != null || y != null) { resolveScrollToPos(this) }
    if (x != null) { this.curOp.scrollLeft = x }
    if (y != null) { this.curOp.scrollTop = y }
  }),
  getScrollInfo: function() {
    var scroller = this.display.scroller
    return {left: scroller.scrollLeft, top: scroller.scrollTop,
            height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
            width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
            clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
  },

  scrollIntoView: methodOp(function(range$$1, margin) {
    if (range$$1 == null) {
      range$$1 = {from: this.doc.sel.primary().head, to: null}
      if (margin == null) { margin = this.options.cursorScrollMargin }
    } else if (typeof range$$1 == "number") {
      range$$1 = {from: Pos(range$$1, 0), to: null}
    } else if (range$$1.from == null) {
      range$$1 = {from: range$$1, to: null}
    }
    if (!range$$1.to) { range$$1.to = range$$1.from }
    range$$1.margin = margin || 0

    if (range$$1.from.line != null) {
      resolveScrollToPos(this)
      this.curOp.scrollToPos = range$$1
    } else {
      var sPos = calculateScrollPos(this, Math.min(range$$1.from.left, range$$1.to.left),
                                    Math.min(range$$1.from.top, range$$1.to.top) - range$$1.margin,
                                    Math.max(range$$1.from.right, range$$1.to.right),
                                    Math.max(range$$1.from.bottom, range$$1.to.bottom) + range$$1.margin)
      this.scrollTo(sPos.scrollLeft, sPos.scrollTop)
    }
  }),

  setSize: methodOp(function(width, height) {
    var this$1 = this;

    var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; }
    if (width != null) { this.display.wrapper.style.width = interpret(width) }
    if (height != null) { this.display.wrapper.style.height = interpret(height) }
    if (this.options.lineWrapping) { clearLineMeasurementCache(this) }
    var lineNo$$1 = this.display.viewFrom
    this.doc.iter(lineNo$$1, this.display.viewTo, function (line) {
      if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
        { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo$$1, "widget"); break } } }
      ++lineNo$$1
    })
    this.curOp.forceUpdate = true
    signal(this, "refresh", this)
  }),

  operation: function(f){return runInOp(this, f)},

  refresh: methodOp(function() {
    var oldHeight = this.display.cachedTextHeight
    regChange(this)
    this.curOp.forceUpdate = true
    clearCaches(this)
    this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop)
    updateGutterSpace(this)
    if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
      { estimateLineHeights(this) }
    signal(this, "refresh", this)
  }),

  swapDoc: methodOp(function(doc) {
    var old = this.doc
    old.cm = null
    attachDoc(this, doc)
    clearCaches(this)
    this.display.input.reset()
    this.scrollTo(doc.scrollLeft, doc.scrollTop)
    this.curOp.forceScroll = true
    signalLater(this, "swapDoc", this, old)
    return old
  }),

  getInputField: function(){return this.display.input.getField()},
  getWrapperElement: function(){return this.display.wrapper},
  getScrollerElement: function(){return this.display.scroller},
  getGutterElement: function(){return this.display.gutters}
}
eventMixin(CodeMirror)

CodeMirror.registerHelper = function(type, name, value) {
  if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []} }
  helpers[type][name] = value
}
CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
  CodeMirror.registerHelper(type, name, value)
  helpers[type]._global.push({pred: predicate, val: value})
}

}

// Used for horizontal relative motion. Dir is -1 or 1 (left or // right), unit can be “char”, “column” (like char, but doesn't // cross line boundaries), “word” (across next word), or “group” (to // the start of next group of word or non-word-non-whitespace // chars). The visually param controls whether, in right-to-left // text, direction 1 means to move towards the next index in the // string, or towards the character to the right of the current // position. The resulting position will have a hitSide=true // property if it reached the end of the document. function findPosH(doc, pos, dir, unit, visually) {

var line = pos.line, ch = pos.ch, origDir = dir
var lineObj = getLine(doc, line)
function findNextLine() {
  var l = line + dir
  if (l < doc.first || l >= doc.first + doc.size) { return false }
  line = l
  return lineObj = getLine(doc, l)
}
function moveOnce(boundToLine) {
  var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true)
  if (next == null) {
    if (!boundToLine && findNextLine()) {
      if (visually) { ch = (dir < 0 ? lineRight : lineLeft)(lineObj) }
      else { ch = dir < 0 ? lineObj.text.length : 0 }
    } else { return false }
  } else { ch = next }
  return true
}

if (unit == "char") {
  moveOnce()
} else if (unit == "column") {
  moveOnce(true)
} else if (unit == "word" || unit == "group") {
  var sawType = null, group = unit == "group"
  var helper = doc.cm && doc.cm.getHelper(pos, "wordChars")
  for (var first = true;; first = false) {
    if (dir < 0 && !moveOnce(!first)) { break }
    var cur = lineObj.text.charAt(ch) || "\n"
    var type = isWordChar(cur, helper) ? "w"
      : group && cur == "\n" ? "n"
      : !group || /\s/.test(cur) ? null
      : "p"
    if (group && !first && !type) { type = "s" }
    if (sawType && sawType != type) {
      if (dir < 0) {dir = 1; moveOnce()}
      break
    }

    if (type) { sawType = type }
    if (dir > 0 && !moveOnce(!first)) { break }
  }
}
var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true)
if (!cmp(pos, result)) { result.hitSide = true }
return result

}

// For relative vertical movement. Dir may be -1 or 1. Unit can be // “page” or “line”. The resulting position will have a hitSide=true // property if it reached the end of the document. function findPosV(cm, pos, dir, unit) {

var doc = cm.doc, x = pos.left, y
if (unit == "page") {
  var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight)
  var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3)
  y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount

} else if (unit == "line") {
  y = dir > 0 ? pos.bottom + 3 : pos.top - 3
}
var target
for (;;) {
  target = coordsChar(cm, x, y)
  if (!target.outside) { break }
  if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
  y += dir * 5
}
return target

}

// CONTENTEDITABLE INPUT STYLE

function ContentEditableInput(cm) {

this.cm = cm
this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
this.polling = new Delayed()
this.gracePeriod = false

}

ContentEditableInput.prototype = copyObj({

init: function(display) {
  var input = this, cm = input.cm
  var div = input.div = display.lineDiv
  disableBrowserMagic(div, cm.options.spellcheck)

  on(div, "paste", function (e) {
    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
    // IE doesn't fire input events, so we schedule a read for the pasted content in this way
    if (ie_version <= 11) { setTimeout(operation(cm, function () {
      if (!input.pollContent()) { regChange(cm) }
    }), 20) }
  })

  on(div, "compositionstart", function (e) {
    var data = e.data
    input.composing = {sel: cm.doc.sel, data: data, startData: data}
    if (!data) { return }
    var prim = cm.doc.sel.primary()
    var line = cm.getLine(prim.head.line)
    var found = line.indexOf(data, Math.max(0, prim.head.ch - data.length))
    if (found > -1 && found <= prim.head.ch)
      { input.composing.sel = simpleSelection(Pos(prim.head.line, found),
                                            Pos(prim.head.line, found + data.length)) }
  })
  on(div, "compositionupdate", function (e) { return input.composing.data = e.data; })
  on(div, "compositionend", function (e) {
    var ours = input.composing
    if (!ours) { return }
    if (e.data != ours.startData && !/\u200b/.test(e.data))
      { ours.data = e.data }
    // Need a small delay to prevent other code (input event,
    // selection polling) from doing damage when fired right after
    // compositionend.
    setTimeout(function () {
      if (!ours.handled)
        { input.applyComposition(ours) }
      if (input.composing == ours)
        { input.composing = null }
    }, 50)
  })

  on(div, "touchstart", function () { return input.forceCompositionEnd(); })

  on(div, "input", function () {
    if (input.composing) { return }
    if (cm.isReadOnly() || !input.pollContent())
      { runInOp(input.cm, function () { return regChange(cm); }) }
  })

  function onCopyCut(e) {
    if (signalDOMEvent(cm, e)) { return }
    if (cm.somethingSelected()) {
      setLastCopied({lineWise: false, text: cm.getSelections()})
      if (e.type == "cut") { cm.replaceSelection("", null, "cut") }
    } else if (!cm.options.lineWiseCopyCut) {
      return
    } else {
      var ranges = copyableRanges(cm)
      setLastCopied({lineWise: true, text: ranges.text})
      if (e.type == "cut") {
        cm.operation(function () {
          cm.setSelections(ranges.ranges, 0, sel_dontScroll)
          cm.replaceSelection("", null, "cut")
        })
      }
    }
    if (e.clipboardData) {
      e.clipboardData.clearData()
      var content = lastCopied.text.join("\n")
      // iOS exposes the clipboard API, but seems to discard content inserted into it
      e.clipboardData.setData("Text", content)
      if (e.clipboardData.getData("Text") == content) {
        e.preventDefault()
        return
      }
    }
    // Old-fashioned briefly-focus-a-textarea hack
    var kludge = hiddenTextarea(), te = kludge.firstChild
    cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
    te.value = lastCopied.text.join("\n")
    var hadFocus = document.activeElement
    selectInput(te)
    setTimeout(function () {
      cm.display.lineSpace.removeChild(kludge)
      hadFocus.focus()
      if (hadFocus == div) { input.showPrimarySelection() }
    }, 50)
  }
  on(div, "copy", onCopyCut)
  on(div, "cut", onCopyCut)
},

prepareSelection: function() {
  var result = prepareSelection(this.cm, false)
  result.focus = this.cm.state.focused
  return result
},

showSelection: function(info, takeFocus) {
  if (!info || !this.cm.display.view.length) { return }
  if (info.focus || takeFocus) { this.showPrimarySelection() }
  this.showMultipleSelections(info)
},

showPrimarySelection: function() {
  var sel = window.getSelection(), prim = this.cm.doc.sel.primary()
  var curAnchor = domToPos(this.cm, sel.anchorNode, sel.anchorOffset)
  var curFocus = domToPos(this.cm, sel.focusNode, sel.focusOffset)
  if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
      cmp(minPos(curAnchor, curFocus), prim.from()) == 0 &&
      cmp(maxPos(curAnchor, curFocus), prim.to()) == 0)
    { return }

  var start = posToDOM(this.cm, prim.from())
  var end = posToDOM(this.cm, prim.to())
  if (!start && !end) { return }

  var view = this.cm.display.view
  var old = sel.rangeCount && sel.getRangeAt(0)
  if (!start) {
    start = {node: view[0].measure.map[2], offset: 0}
  } else if (!end) { // FIXME dangerously hacky
    var measure = view[view.length - 1].measure
    var map$$1 = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
    end = {node: map$$1[map$$1.length - 1], offset: map$$1[map$$1.length - 2] - map$$1[map$$1.length - 3]}
  }

  var rng
  try { rng = range(start.node, start.offset, end.offset, end.node) }
  catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
  if (rng) {
    if (!gecko && this.cm.state.focused) {
      sel.collapse(start.node, start.offset)
      if (!rng.collapsed) {
        sel.removeAllRanges()
        sel.addRange(rng)
      }
    } else {
      sel.removeAllRanges()
      sel.addRange(rng)
    }
    if (old && sel.anchorNode == null) { sel.addRange(old) }
    else if (gecko) { this.startGracePeriod() }
  }
  this.rememberSelection()
},

startGracePeriod: function() {
  var this$1 = this;

  clearTimeout(this.gracePeriod)
  this.gracePeriod = setTimeout(function () {
    this$1.gracePeriod = false
    if (this$1.selectionChanged())
      { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }) }
  }, 20)
},

showMultipleSelections: function(info) {
  removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
  removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
},

rememberSelection: function() {
  var sel = window.getSelection()
  this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
  this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
},

selectionInEditor: function() {
  var sel = window.getSelection()
  if (!sel.rangeCount) { return false }
  var node = sel.getRangeAt(0).commonAncestorContainer
  return contains(this.div, node)
},

focus: function() {
  if (this.cm.options.readOnly != "nocursor") { this.div.focus() }
},
blur: function() { this.div.blur() },
getField: function() { return this.div },

supportsTouch: function() { return true },

receivedFocus: function() {
  var input = this
  if (this.selectionInEditor())
    { this.pollSelection() }
  else
    { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }) }

  function poll() {
    if (input.cm.state.focused) {
      input.pollSelection()
      input.polling.set(input.cm.options.pollInterval, poll)
    }
  }
  this.polling.set(this.cm.options.pollInterval, poll)
},

selectionChanged: function() {
  var sel = window.getSelection()
  return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
    sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
},

pollSelection: function() {
  if (!this.composing && !this.gracePeriod && this.selectionChanged()) {
    var sel = window.getSelection(), cm = this.cm
    this.rememberSelection()
    var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
    var head = domToPos(cm, sel.focusNode, sel.focusOffset)
    if (anchor && head) { runInOp(cm, function () {
      setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
      if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true }
    }) }
  }
},

pollContent: function() {
  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
  var from = sel.from(), to = sel.to()
  if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }

  var fromIndex, fromLine, fromNode
  if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
    fromLine = lineNo(display.view[0].line)
    fromNode = display.view[0].node
  } else {
    fromLine = lineNo(display.view[fromIndex].line)
    fromNode = display.view[fromIndex - 1].node.nextSibling
  }
  var toIndex = findViewIndex(cm, to.line)
  var toLine, toNode
  if (toIndex == display.view.length - 1) {
    toLine = display.viewTo - 1
    toNode = display.lineDiv.lastChild
  } else {
    toLine = lineNo(display.view[toIndex + 1].line) - 1
    toNode = display.view[toIndex + 1].node.previousSibling
  }

  var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
  var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
  while (newText.length > 1 && oldText.length > 1) {
    if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
    else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
    else { break }
  }

  var cutFront = 0, cutEnd = 0
  var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
  while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
    { ++cutFront }
  var newBot = lst(newText), oldBot = lst(oldText)
  var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
                           oldBot.length - (oldText.length == 1 ? cutFront : 0))
  while (cutEnd < maxCutEnd &&
         newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
    { ++cutEnd }

  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd)
  newText[0] = newText[0].slice(cutFront)

  var chFrom = Pos(fromLine, cutFront)
  var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
  if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
    replaceRange(cm.doc, newText, chFrom, chTo, "+input")
    return true
  }
},

ensurePolled: function() {
  this.forceCompositionEnd()
},
reset: function() {
  this.forceCompositionEnd()
},
forceCompositionEnd: function() {
  if (!this.composing || this.composing.handled) { return }
  this.applyComposition(this.composing)
  this.composing.handled = true
  this.div.blur()
  this.div.focus()
},
applyComposition: function(composing) {
  if (this.cm.isReadOnly())
    { operation(this.cm, regChange)(this.cm) }
  else if (composing.data && composing.data != composing.startData)
    { operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel) }
},

setUneditable: function(node) {
  node.contentEditable = "false"
},

onKeyPress: function(e) {
  e.preventDefault()
  if (!this.cm.isReadOnly())
    { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0) }
},

readOnlyChanged: function(val) {
  this.div.contentEditable = String(val != "nocursor")
},

onContextMenu: nothing,
resetPosition: nothing,

needsContentAttribute: true
}, ContentEditableInput.prototype)

function posToDOM(cm, pos) {

var view = findViewForLine(cm, pos.line)
if (!view || view.hidden) { return null }
var line = getLine(cm.doc, pos.line)
var info = mapFromLineView(view, line, pos.line)

var order = getOrder(line), side = "left"
if (order) {
  var partPos = getBidiPartAt(order, pos.ch)
  side = partPos % 2 ? "right" : "left"
}
var result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
result.offset = result.collapse == "right" ? result.end : result.start
return result

}

function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }

function domTextBetween(cm, from, to, fromLine, toLine) {

var text = "", closing = false, lineSep = cm.doc.lineSeparator()
function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
function walk(node) {
  if (node.nodeType == 1) {
    var cmText = node.getAttribute("cm-text")
    if (cmText != null) {
      if (cmText == "") { cmText = node.textContent.replace(/\u200b/g, "") }
      text += cmText
      return
    }
    var markerID = node.getAttribute("cm-marker"), range$$1
    if (markerID) {
      var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
      if (found.length && (range$$1 = found[0].find()))
        { text += getBetween(cm.doc, range$$1.from, range$$1.to).join(lineSep) }
      return
    }
    if (node.getAttribute("contenteditable") == "false") { return }
    for (var i = 0; i < node.childNodes.length; i++)
      { walk(node.childNodes[i]) }
    if (/^(pre|div|p)$/i.test(node.nodeName))
      { closing = true }
  } else if (node.nodeType == 3) {
    var val = node.nodeValue
    if (!val) { return }
    if (closing) {
      text += lineSep
      closing = false
    }
    text += val
  }
}
for (;;) {
  walk(from)
  if (from == to) { break }
  from = from.nextSibling
}
return text

}

function domToPos(cm, node, offset) {

var lineNode
if (node == cm.display.lineDiv) {
  lineNode = cm.display.lineDiv.childNodes[offset]
  if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
  node = null; offset = 0
} else {
  for (lineNode = node;; lineNode = lineNode.parentNode) {
    if (!lineNode || lineNode == cm.display.lineDiv) { return null }
    if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
  }
}
for (var i = 0; i < cm.display.view.length; i++) {
  var lineView = cm.display.view[i]
  if (lineView.node == lineNode)
    { return locateNodeInLineView(lineView, node, offset) }
}

}

function locateNodeInLineView(lineView, node, offset) {

var wrapper = lineView.text.firstChild, bad = false
if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
if (node == wrapper) {
  bad = true
  node = wrapper.childNodes[offset]
  offset = 0
  if (!node) {
    var line = lineView.rest ? lst(lineView.rest) : lineView.line
    return badPos(Pos(lineNo(line), line.text.length), bad)
  }
}

var textNode = node.nodeType == 3 ? node : null, topNode = node
if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
  textNode = node.firstChild
  if (offset) { offset = textNode.nodeValue.length }
}
while (topNode.parentNode != wrapper) { topNode = topNode.parentNode }
var measure = lineView.measure, maps = measure.maps

function find(textNode, topNode, offset) {
  for (var i = -1; i < (maps ? maps.length : 0); i++) {
    var map$$1 = i < 0 ? measure.map : maps[i]
    for (var j = 0; j < map$$1.length; j += 3) {
      var curNode = map$$1[j + 2]
      if (curNode == textNode || curNode == topNode) {
        var line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
        var ch = map$$1[j] + offset
        if (offset < 0 || curNode != textNode) { ch = map$$1[j + (offset ? 1 : 0)] }
        return Pos(line, ch)
      }
    }
  }
}
var found = find(textNode, topNode, offset)
if (found) { return badPos(found, bad) }

// FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
  found = find(after, after.firstChild, 0)
  if (found)
    { return badPos(Pos(found.line, found.ch - dist), bad) }
  else
    { dist += after.textContent.length }
}
for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
  found = find(before, before.firstChild, -1)
  if (found)
    { return badPos(Pos(found.line, found.ch + dist$1), bad) }
  else
    { dist$1 += before.textContent.length }
}

}

// TEXTAREA INPUT STYLE

function TextareaInput(cm) {

this.cm = cm
// See input.poll and input.reset
this.prevInput = ""

// Flag that indicates whether we expect input to appear real soon
// now (after some event like 'keypress' or 'input') and are
// polling intensively.
this.pollingFast = false
// Self-resetting timeout for the poller
this.polling = new Delayed()
// Tracks when input.reset has punted to just putting a short
// string into the textarea instead of the full selection.
this.inaccurateSelection = false
// Used to work around IE issue with selection being forgotten when focus moves away from textarea
this.hasSelection = false
this.composing = null

}

TextareaInput.prototype = copyObj({

init: function(display) {
  var this$1 = this;

  var input = this, cm = this.cm

  // Wraps and hides input textarea
  var div = this.wrapper = hiddenTextarea()
  // The semihidden textarea that is focused when the editor is
  // focused, and receives input.
  var te = this.textarea = div.firstChild
  display.wrapper.insertBefore(div, display.wrapper.firstChild)

  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
  if (ios) { te.style.width = "0px" }

  on(te, "input", function () {
    if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null }
    input.poll()
  })

  on(te, "paste", function (e) {
    if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }

    cm.state.pasteIncoming = true
    input.fastPoll()
  })

  function prepareCopyCut(e) {
    if (signalDOMEvent(cm, e)) { return }
    if (cm.somethingSelected()) {
      setLastCopied({lineWise: false, text: cm.getSelections()})
      if (input.inaccurateSelection) {
        input.prevInput = ""
        input.inaccurateSelection = false
        te.value = lastCopied.text.join("\n")
        selectInput(te)
      }
    } else if (!cm.options.lineWiseCopyCut) {
      return
    } else {
      var ranges = copyableRanges(cm)
      setLastCopied({lineWise: true, text: ranges.text})
      if (e.type == "cut") {
        cm.setSelections(ranges.ranges, null, sel_dontScroll)
      } else {
        input.prevInput = ""
        te.value = ranges.text.join("\n")
        selectInput(te)
      }
    }
    if (e.type == "cut") { cm.state.cutIncoming = true }
  }
  on(te, "cut", prepareCopyCut)
  on(te, "copy", prepareCopyCut)

  on(display.scroller, "paste", function (e) {
    if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
    cm.state.pasteIncoming = true
    input.focus()
  })

  // Prevent normal selection in the editor (we handle our own)
  on(display.lineSpace, "selectstart", function (e) {
    if (!eventInWidget(display, e)) { e_preventDefault(e) }
  })

  on(te, "compositionstart", function () {
    var start = cm.getCursor("from")
    if (input.composing) { input.composing.range.clear() }
    input.composing = {
      start: start,
      range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
    }
  })
  on(te, "compositionend", function () {
    if (input.composing) {
      input.poll()
      input.composing.range.clear()
      input.composing = null
    }
  })
},

prepareSelection: function() {
  // Redraw the selection and/or cursor
  var cm = this.cm, display = cm.display, doc = cm.doc
  var result = prepareSelection(cm)

  // Move the hidden textarea near the cursor to prevent scrolling artifacts
  if (cm.options.moveInputWithCursor) {
    var headPos = cursorCoords(cm, doc.sel.primary().head, "div")
    var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
    result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
                                        headPos.top + lineOff.top - wrapOff.top))
    result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
                                         headPos.left + lineOff.left - wrapOff.left))
  }

  return result
},

showSelection: function(drawn) {
  var cm = this.cm, display = cm.display
  removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
  removeChildrenAndAdd(display.selectionDiv, drawn.selection)
  if (drawn.teTop != null) {
    this.wrapper.style.top = drawn.teTop + "px"
    this.wrapper.style.left = drawn.teLeft + "px"
  }
},

// Reset the input to correspond to the selection (or to be empty,
// when not typing and nothing is selected)
reset: function(typing) {
  if (this.contextMenuPending) { return }
  var minimal, selected, cm = this.cm, doc = cm.doc
  if (cm.somethingSelected()) {
    this.prevInput = ""
    var range$$1 = doc.sel.primary()
    minimal = hasCopyEvent &&
      (range$$1.to().line - range$$1.from().line > 100 || (selected = cm.getSelection()).length > 1000)
    var content = minimal ? "-" : selected || cm.getSelection()
    this.textarea.value = content
    if (cm.state.focused) { selectInput(this.textarea) }
    if (ie && ie_version >= 9) { this.hasSelection = content }
  } else if (!typing) {
    this.prevInput = this.textarea.value = ""
    if (ie && ie_version >= 9) { this.hasSelection = null }
  }
  this.inaccurateSelection = minimal
},

getField: function() { return this.textarea },

supportsTouch: function() { return false },

focus: function() {
  if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
    try { this.textarea.focus() }
    catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
  }
},

blur: function() { this.textarea.blur() },

resetPosition: function() {
  this.wrapper.style.top = this.wrapper.style.left = 0
},

receivedFocus: function() { this.slowPoll() },

// Poll for input changes, using the normal rate of polling. This
// runs as long as the editor is focused.
slowPoll: function() {
  var this$1 = this;

  if (this.pollingFast) { return }
  this.polling.set(this.cm.options.pollInterval, function () {
    this$1.poll()
    if (this$1.cm.state.focused) { this$1.slowPoll() }
  })
},

// When an event has just come in that is likely to add or change
// something in the input textarea, we poll faster, to ensure that
// the change appears on the screen quickly.
fastPoll: function() {
  var missed = false, input = this
  input.pollingFast = true
  function p() {
    var changed = input.poll()
    if (!changed && !missed) {missed = true; input.polling.set(60, p)}
    else {input.pollingFast = false; input.slowPoll()}
  }
  input.polling.set(20, p)
},

// Read input from the textarea, and update the document to match.
// When something is selected, it is present in the textarea, and
// selected (unless it is huge, in which case a placeholder is
// used). When nothing is selected, the cursor sits after previously
// seen text (can be empty), which is stored in prevInput (we must
// not reset the textarea when typing, because that breaks IME).
poll: function() {
  var this$1 = this;

  var cm = this.cm, input = this.textarea, prevInput = this.prevInput
  // Since this is called a *lot*, try to bail out as cheaply as
  // possible when it is clear that nothing happened. hasSelection
  // will be the case when there is a lot of text in the textarea,
  // in which case reading its value would be expensive.
  if (this.contextMenuPending || !cm.state.focused ||
      (hasSelection(input) && !prevInput && !this.composing) ||
      cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
    { return false }

  var text = input.value
  // If nothing changed, bail.
  if (text == prevInput && !cm.somethingSelected()) { return false }
  // Work around nonsensical selection resetting in IE9/10, and
  // inexplicable appearance of private area unicode characters on
  // some key combos in Mac (#2689).
  if (ie && ie_version >= 9 && this.hasSelection === text ||
      mac && /[\uf700-\uf7ff]/.test(text)) {
    cm.display.input.reset()
    return false
  }

  if (cm.doc.sel == cm.display.selForContextMenu) {
    var first = text.charCodeAt(0)
    if (first == 0x200b && !prevInput) { prevInput = "\u200b" }
    if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
  }
  // Find the part of the input that is actually new
  var same = 0, l = Math.min(prevInput.length, text.length)
  while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same }

  runInOp(cm, function () {
    applyTextInput(cm, text.slice(same), prevInput.length - same,
                   null, this$1.composing ? "*compose" : null)

    // Don't leave long text in the textarea, since it makes further polling slow
    if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = "" }
    else { this$1.prevInput = text }

    if (this$1.composing) {
      this$1.composing.range.clear()
      this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
                                         {className: "CodeMirror-composing"})
    }
  })
  return true
},

ensurePolled: function() {
  if (this.pollingFast && this.poll()) { this.pollingFast = false }
},

onKeyPress: function() {
  if (ie && ie_version >= 9) { this.hasSelection = null }
  this.fastPoll()
},

onContextMenu: function(e) {
  var input = this, cm = input.cm, display = cm.display, te = input.textarea
  var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop
  if (!pos || presto) { return } // Opera is difficult.

  // Reset the current text selection only if the click is done outside of the selection
  // and 'resetSelectionOnContextMenu' option is true.
  var reset = cm.options.resetSelectionOnContextMenu
  if (reset && cm.doc.sel.contains(pos) == -1)
    { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll) }

  var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText
  input.wrapper.style.cssText = "position: absolute"
  var wrapperBox = input.wrapper.getBoundingClientRect()
  te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);"
  var oldScrollY
  if (webkit) { oldScrollY = window.scrollY } // Work around Chrome issue (#2712)
  display.input.focus()
  if (webkit) { window.scrollTo(null, oldScrollY) }
  display.input.reset()
  // Adds "Select all" to context menu in FF
  if (!cm.somethingSelected()) { te.value = input.prevInput = " " }
  input.contextMenuPending = true
  display.selForContextMenu = cm.doc.sel
  clearTimeout(display.detectingSelectAll)

  // Select-all will be greyed out if there's nothing to select, so
  // this adds a zero-width space so that we can later check whether
  // it got selected.
  function prepareSelectAllHack() {
    if (te.selectionStart != null) {
      var selected = cm.somethingSelected()
      var extval = "\u200b" + (selected ? te.value : "")
      te.value = "\u21da" // Used to catch context-menu undo
      te.value = extval
      input.prevInput = selected ? "" : "\u200b"
      te.selectionStart = 1; te.selectionEnd = extval.length
      // Re-set this, in case some other handler touched the
      // selection in the meantime.
      display.selForContextMenu = cm.doc.sel
    }
  }
  function rehide() {
    input.contextMenuPending = false
    input.wrapper.style.cssText = oldWrapperCSS
    te.style.cssText = oldCSS
    if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos) }

    // Try to detect the user choosing select-all
    if (te.selectionStart != null) {
      if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack() }
      var i = 0, poll = function () {
        if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
            te.selectionEnd > 0 && input.prevInput == "\u200b")
          { operation(cm, selectAll)(cm) }
        else if (i++ < 10) { display.detectingSelectAll = setTimeout(poll, 500) }
        else { display.input.reset() }
      }
      display.detectingSelectAll = setTimeout(poll, 200)
    }
  }

  if (ie && ie_version >= 9) { prepareSelectAllHack() }
  if (captureRightClick) {
    e_stop(e)
    var mouseup = function () {
      off(window, "mouseup", mouseup)
      setTimeout(rehide, 20)
    }
    on(window, "mouseup", mouseup)
  } else {
    setTimeout(rehide, 50)
  }
},

readOnlyChanged: function(val) {
  if (!val) { this.reset() }
},

setUneditable: nothing,

needsContentAttribute: false

}, TextareaInput.prototype)

function fromTextArea(textarea, options) {

options = options ? copyObj(options) : {}
options.value = textarea.value
if (!options.tabindex && textarea.tabIndex)
  { options.tabindex = textarea.tabIndex }
if (!options.placeholder && textarea.placeholder)
  { options.placeholder = textarea.placeholder }
// Set autofocus to true if this textarea is focused, or if it has
// autofocus and no other element is focused.
if (options.autofocus == null) {
  var hasFocus = activeElt()
  options.autofocus = hasFocus == textarea ||
    textarea.getAttribute("autofocus") != null && hasFocus == document.body
}

function save() {textarea.value = cm.getValue()}

var realSubmit
if (textarea.form) {
  on(textarea.form, "submit", save)
  // Deplorable hack to make the submit method do the right thing.
  if (!options.leaveSubmitMethodAlone) {
    var form = textarea.form
    realSubmit = form.submit
    try {
      var wrappedSubmit = form.submit = function () {
        save()
        form.submit = realSubmit
        form.submit()
        form.submit = wrappedSubmit
      }
    } catch(e) {}
  }
}

options.finishInit = function (cm) {
  cm.save = save
  cm.getTextArea = function () { return textarea; }
  cm.toTextArea = function () {
    cm.toTextArea = isNaN // Prevent this from being ran twice
    save()
    textarea.parentNode.removeChild(cm.getWrapperElement())
    textarea.style.display = ""
    if (textarea.form) {
      off(textarea.form, "submit", save)
      if (typeof textarea.form.submit == "function")
        { textarea.form.submit = realSubmit }
    }
  }
}

textarea.style.display = "none"
var cm = CodeMirror$1(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
  options)
return cm

}

function addLegacyProps(CodeMirror) {

CodeMirror.off = off
CodeMirror.on = on
CodeMirror.wheelEventPixels = wheelEventPixels
CodeMirror.Doc = Doc
CodeMirror.splitLines = splitLinesAuto
CodeMirror.countColumn = countColumn
CodeMirror.findColumn = findColumn
CodeMirror.isWordChar = isWordCharBasic
CodeMirror.Pass = Pass
CodeMirror.signal = signal
CodeMirror.Line = Line
CodeMirror.changeEnd = changeEnd
CodeMirror.scrollbarModel = scrollbarModel
CodeMirror.Pos = Pos
CodeMirror.cmpPos = cmp
CodeMirror.modes = modes
CodeMirror.mimeModes = mimeModes
CodeMirror.resolveMode = resolveMode
CodeMirror.getMode = getMode
CodeMirror.modeExtensions = modeExtensions
CodeMirror.extendMode = extendMode
CodeMirror.copyState = copyState
CodeMirror.startState = startState
CodeMirror.innerMode = innerMode
CodeMirror.commands = commands
CodeMirror.keyMap = keyMap
CodeMirror.keyName = keyName
CodeMirror.isModifierKey = isModifierKey
CodeMirror.lookupKey = lookupKey
CodeMirror.normalizeKeyMap = normalizeKeyMap
CodeMirror.StringStream = StringStream
CodeMirror.SharedTextMarker = SharedTextMarker
CodeMirror.TextMarker = TextMarker
CodeMirror.LineWidget = LineWidget
CodeMirror.e_preventDefault = e_preventDefault
CodeMirror.e_stopPropagation = e_stopPropagation
CodeMirror.e_stop = e_stop
CodeMirror.addClass = addClass
CodeMirror.contains = contains
CodeMirror.rmClass = rmClass
CodeMirror.keyNames = keyNames

}

// EDITOR CONSTRUCTOR

defineOptions(CodeMirror$1)

addEditorMethods(CodeMirror$1)

// Set up methods on CodeMirror's prototype to redirect to the editor's document. var dontDelegate = “iter insert remove copy getEditor constructor”.split(“ ”) for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)

{ CodeMirror$1.prototype[prop] = (function(method) {
  return function() {return method.apply(this.doc, arguments)}
})(Doc.prototype[prop]) } }

eventMixin(Doc)

// INPUT HANDLING

CodeMirror$1.inputStyles = {“textarea”: TextareaInput, “contenteditable”: ContentEditableInput}

// MODE DEFINITION AND QUERYING

// Extra arguments are stored as the mode's dependencies, which is // used by (legacy) mechanisms like loadmode.js to automatically // load a mode. (Preferred mechanism is the require/define calls.) CodeMirror$1.defineMode = function(name/*, mode, …*/) {

if (!CodeMirror$1.defaults.mode && name != "null") { CodeMirror$1.defaults.mode = name }
defineMode.apply(this, arguments)

}

CodeMirror$1.defineMIME = defineMIME

// Minimal default mode. CodeMirror$1.defineMode(“null”, function () { return ({token: function (stream) { return stream.skipToEnd(); }}); }) CodeMirror$1.defineMIME(“text/plain”, “null”)

// EXTENSIONS

CodeMirror$1.defineExtension = function (name, func) {

CodeMirror$1.prototype[name] = func

} CodeMirror$1.defineDocExtension = function (name, func) {

Doc.prototype[name] = func

}

CodeMirror$1.fromTextArea = fromTextArea

addLegacyProps(CodeMirror$1)

CodeMirror$1.version = “5.20.2”

return CodeMirror$1;

})));