// Ion.RangeSlider // version 2.2.0 Build: 380 // © Denis Ineshin, 2017 // github.com/IonDen // // Project page: ionden.com/a/plugins/ion.rangeSlider/en.html // GitHub page: github.com/IonDen/ion.rangeSlider // // Released under MIT licence: // ionden.com/a/plugins/licence-en.html // =====================================================================================================================

;(function(factory) {

if (typeof define === "function" && define.amd) {
    define(["jquery"], function (jQuery) {
        return factory(jQuery, document, window, navigator);
    });
} else if (typeof exports === "object") {
    factory(require("jquery"), document, window, navigator);
} else {
    factory(jQuery, document, window, navigator);
}

} (function ($, document, window, navigator, undefined) {

"use strict";

// =================================================================================================================
// Service

var plugin_count = 0;

// IE8 fix
var is_old_ie = (function () {
    var n = navigator.userAgent,
        r = /msie\s\d+/i,
        v;
    if (n.search(r) > 0) {
        v = r.exec(n).toString();
        v = v.split(" ")[1];
        if (v < 9) {
            $("html").addClass("lt-ie9");
            return true;
        }
    }
    return false;
} ());
if (!Function.prototype.bind) {
    Function.prototype.bind = function bind(that) {

        var target = this;
        var slice = [].slice;

        if (typeof target != "function") {
            throw new TypeError();
        }

        var args = slice.call(arguments, 1),
            bound = function () {

                if (this instanceof bound) {

                    var F = function(){};
                    F.prototype = target.prototype;
                    var self = new F();

                    var result = target.apply(
                        self,
                        args.concat(slice.call(arguments))
                    );
                    if (Object(result) === result) {
                        return result;
                    }
                    return self;

                } else {

                    return target.apply(
                        that,
                        args.concat(slice.call(arguments))
                    );

                }

            };

        return bound;
    };
}
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function(searchElement, fromIndex) {
        var k;
        if (this == null) {
            throw new TypeError('"this" is null or not defined');
        }
        var O = Object(this);
        var len = O.length >>> 0;
        if (len === 0) {
            return -1;
        }
        var n = +fromIndex || 0;
        if (Math.abs(n) === Infinity) {
            n = 0;
        }
        if (n >= len) {
            return -1;
        }
        k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
        while (k < len) {
            if (k in O && O[k] === searchElement) {
                return k;
            }
            k++;
        }
        return -1;
    };
}

// =================================================================================================================
// Template

var base_html =
    '<span class="irs">' +
    '<span class="irs-line" tabindex="0"><span class="irs-line-left"></span><span class="irs-line-mid"></span><span class="irs-line-right"></span></span>' +
    '<span class="irs-min">0</span><span class="irs-max">1</span>' +
    '<span class="irs-from">0</span><span class="irs-to">0</span><span class="irs-single">0</span>' +
    '</span>' +
    '<span class="irs-grid"></span>' +
    '<span class="irs-bar"></span>';

var single_html =
    '<span class="irs-bar-edge"></span>' +
    '<span class="irs-shadow shadow-single"></span>' +
    '<span class="irs-slider single"></span>';

var double_html =
    '<span class="irs-shadow shadow-from"></span>' +
    '<span class="irs-shadow shadow-to"></span>' +
    '<span class="irs-slider from"></span>' +
    '<span class="irs-slider to"></span>';

var disable_html =
    '<span class="irs-disable-mask"></span>';

// =================================================================================================================
// Core

/**
 * Main plugin constructor
 *
 * @param input {Object} link to base input element
 * @param options {Object} slider config
 * @param plugin_count {Number}
 * @constructor
 */
var IonRangeSlider = function (input, options, plugin_count) {
    this.VERSION = "2.2.0";
    this.input = input;
    this.plugin_count = plugin_count;
    this.current_plugin = 0;
    this.calc_count = 0;
    this.update_tm = 0;
    this.old_from = 0;
    this.old_to = 0;
    this.old_min_interval = null;
    this.raf_id = null;
    this.dragging = false;
    this.force_redraw = false;
    this.no_diapason = false;
    this.has_tab_index = true;
    this.is_key = false;
    this.is_update = false;
    this.is_start = true;
    this.is_finish = false;
    this.is_active = false;
    this.is_resize = false;
    this.is_click = false;

    options = options || {};

    // cache for links to all DOM elements
    this.$cache = {
        win: $(window),
        body: $(document.body),
        input: $(input),
        cont: null,
        rs: null,
        min: null,
        max: null,
        from: null,
        to: null,
        single: null,
        bar: null,
        line: null,
        s_single: null,
        s_from: null,
        s_to: null,
        shad_single: null,
        shad_from: null,
        shad_to: null,
        edge: null,
        grid: null,
        grid_labels: []
    };

    // storage for measure variables
    this.coords = {
        // left
        x_gap: 0,
        x_pointer: 0,

        // width
        w_rs: 0,
        w_rs_old: 0,
        w_handle: 0,

        // percents
        p_gap: 0,
        p_gap_left: 0,
        p_gap_right: 0,
        p_step: 0,
        p_pointer: 0,
        p_handle: 0,
        p_single_fake: 0,
        p_single_real: 0,
        p_from_fake: 0,
        p_from_real: 0,
        p_to_fake: 0,
        p_to_real: 0,
        p_bar_x: 0,
        p_bar_w: 0,

        // grid
        grid_gap: 0,
        big_num: 0,
        big: [],
        big_w: [],
        big_p: [],
        big_x: []
    };

    // storage for labels measure variables
    this.labels = {
        // width
        w_min: 0,
        w_max: 0,
        w_from: 0,
        w_to: 0,
        w_single: 0,

        // percents
        p_min: 0,
        p_max: 0,
        p_from_fake: 0,
        p_from_left: 0,
        p_to_fake: 0,
        p_to_left: 0,
        p_single_fake: 0,
        p_single_left: 0
    };

    /**
     * get and validate config
     */
    var $inp = this.$cache.input,
        val = $inp.prop("value"),
        config, config_from_data, prop;

    // default config
    config = {
        type: "single",

        min: 10,
        max: 100,
        from: null,
        to: null,
        step: 1,

        min_interval: 0,
        max_interval: 0,
        drag_interval: false,

        values: [],
        p_values: [],

        from_fixed: false,
        from_min: null,
        from_max: null,
        from_shadow: false,

        to_fixed: false,
        to_min: null,
        to_max: null,
        to_shadow: false,

        prettify_enabled: true,
        prettify_separator: " ",
        prettify: null,

        force_edges: false,

        keyboard: true,

        grid: false,
        grid_margin: true,
        grid_num: 4,
        grid_snap: false,

        hide_min_max: false,
        hide_from_to: false,

        prefix: "",
        postfix: "",
        max_postfix: "",
        decorate_both: true,
        values_separator: " — ",

        input_values_separator: ";",

        disable: false,
        block: false,

        extra_classes: "",

        scope: null,
        onStart: null,
        onChange: null,
        onFinish: null,
        onUpdate: null
    };

    // check if base element is input
    if ($inp[0].nodeName !== "INPUT") {
        console && console.warn && console.warn("Base element should be <input>!", $inp[0]);
    }

    // config from data-attributes extends js config
    config_from_data = {
        type: $inp.data("type"),

        min: $inp.data("min"),
        max: $inp.data("max"),
        from: $inp.data("from"),
        to: $inp.data("to"),
        step: $inp.data("step"),

        min_interval: $inp.data("minInterval"),
        max_interval: $inp.data("maxInterval"),
        drag_interval: $inp.data("dragInterval"),

        values: $inp.data("values"),

        from_fixed: $inp.data("fromFixed"),
        from_min: $inp.data("fromMin"),
        from_max: $inp.data("fromMax"),
        from_shadow: $inp.data("fromShadow"),

        to_fixed: $inp.data("toFixed"),
        to_min: $inp.data("toMin"),
        to_max: $inp.data("toMax"),
        to_shadow: $inp.data("toShadow"),

        prettify_enabled: $inp.data("prettifyEnabled"),
        prettify_separator: $inp.data("prettifySeparator"),

        force_edges: $inp.data("forceEdges"),

        keyboard: $inp.data("keyboard"),

        grid: $inp.data("grid"),
        grid_margin: $inp.data("gridMargin"),
        grid_num: $inp.data("gridNum"),
        grid_snap: $inp.data("gridSnap"),

        hide_min_max: $inp.data("hideMinMax"),
        hide_from_to: $inp.data("hideFromTo"),

        prefix: $inp.data("prefix"),
        postfix: $inp.data("postfix"),
        max_postfix: $inp.data("maxPostfix"),
        decorate_both: $inp.data("decorateBoth"),
        values_separator: $inp.data("valuesSeparator"),

        input_values_separator: $inp.data("inputValuesSeparator"),

        disable: $inp.data("disable"),
        block: $inp.data("block"),

        extra_classes: $inp.data("extraClasses"),
    };
    config_from_data.values = config_from_data.values && config_from_data.values.split(",");

    for (prop in config_from_data) {
        if (config_from_data.hasOwnProperty(prop)) {
            if (config_from_data[prop] === undefined || config_from_data[prop] === "") {
                delete config_from_data[prop];
            }
        }
    }

    // input value extends default config
    if (val !== undefined && val !== "") {
        val = val.split(config_from_data.input_values_separator || options.input_values_separator || ";");

        if (val[0] && val[0] == +val[0]) {
            val[0] = +val[0];
        }
        if (val[1] && val[1] == +val[1]) {
            val[1] = +val[1];
        }

        if (options && options.values && options.values.length) {
            config.from = val[0] && options.values.indexOf(val[0]);
            config.to = val[1] && options.values.indexOf(val[1]);
        } else {
            config.from = val[0] && +val[0];
            config.to = val[1] && +val[1];
        }
    }

    // js config extends default config
    $.extend(config, options);

    // data config extends config
    $.extend(config, config_from_data);
    this.options = config;

    // validate config, to be sure that all data types are correct
    this.update_check = {};
    this.validate();

    // default result object, returned to callbacks
    this.result = {
        input: this.$cache.input,
        slider: null,

        min: this.options.min,
        max: this.options.max,

        from: this.options.from,
        from_percent: 0,
        from_value: null,

        to: this.options.to,
        to_percent: 0,
        to_value: null
    };

    this.init();
};

IonRangeSlider.prototype = {

    /**
     * Starts or updates the plugin instance
     *
     * @param [is_update] {boolean}
     */
    init: function (is_update) {
        this.no_diapason = false;
        this.coords.p_step = this.convertToPercent(this.options.step, true);

        this.target = "base";

        this.toggleInput();
        this.append();
        this.setMinMax();

        if (is_update) {
            this.force_redraw = true;
            this.calc(true);

            // callbacks called
            this.callOnUpdate();
        } else {
            this.force_redraw = true;
            this.calc(true);

            // callbacks called
            this.callOnStart();
        }

        this.updateScene();
    },

    /**
     * Appends slider template to a DOM
     */
    append: function () {
        var container_html = '<span class="irs js-irs-' + this.plugin_count + ' ' + this.options.extra_classes + '"></span>';
        this.$cache.input.before(container_html);
        this.$cache.input.prop("readonly", true);
        this.$cache.cont = this.$cache.input.prev();
        this.result.slider = this.$cache.cont;

        this.$cache.cont.html(base_html);
        this.$cache.rs = this.$cache.cont.find(".irs");
        this.$cache.min = this.$cache.cont.find(".irs-min");
        this.$cache.max = this.$cache.cont.find(".irs-max");
        this.$cache.from = this.$cache.cont.find(".irs-from");
        this.$cache.to = this.$cache.cont.find(".irs-to");
        this.$cache.single = this.$cache.cont.find(".irs-single");
        this.$cache.bar = this.$cache.cont.find(".irs-bar");
        this.$cache.line = this.$cache.cont.find(".irs-line");
        this.$cache.grid = this.$cache.cont.find(".irs-grid");

        if (this.options.type === "single") {
            this.$cache.cont.append(single_html);
            this.$cache.edge = this.$cache.cont.find(".irs-bar-edge");
            this.$cache.s_single = this.$cache.cont.find(".single");
            this.$cache.from[0].style.visibility = "hidden";
            this.$cache.to[0].style.visibility = "hidden";
            this.$cache.shad_single = this.$cache.cont.find(".shadow-single");
        } else {
            this.$cache.cont.append(double_html);
            this.$cache.s_from = this.$cache.cont.find(".from");
            this.$cache.s_to = this.$cache.cont.find(".to");
            this.$cache.shad_from = this.$cache.cont.find(".shadow-from");
            this.$cache.shad_to = this.$cache.cont.find(".shadow-to");

            this.setTopHandler();
        }

        if (this.options.hide_from_to) {
            this.$cache.from[0].style.display = "none";
            this.$cache.to[0].style.display = "none";
            this.$cache.single[0].style.display = "none";
        }

        this.appendGrid();

        if (this.options.disable) {
            this.appendDisableMask();
            this.$cache.input[0].disabled = true;
        } else {
            this.$cache.input[0].disabled = false;
            this.removeDisableMask();
            this.bindEvents();
        }

        // block only if not disabled
        if (!this.options.disable) {
            if (this.options.block) {
                this.appendDisableMask();
            } else {
                this.removeDisableMask();
            }
        }

        if (this.options.drag_interval) {
            this.$cache.bar[0].style.cursor = "ew-resize";
        }
    },

    /**
     * Determine which handler has a priority
     * works only for double slider type
     */
    setTopHandler: function () {
        var min = this.options.min,
            max = this.options.max,
            from = this.options.from,
            to = this.options.to;

        if (from > min && to === max) {
            this.$cache.s_from.addClass("type_last");
        } else if (to < max) {
            this.$cache.s_to.addClass("type_last");
        }
    },

    /**
     * Determine which handles was clicked last
     * and which handler should have hover effect
     *
     * @param target {String}
     */
    changeLevel: function (target) {
        switch (target) {
            case "single":
                this.coords.p_gap = this.toFixed(this.coords.p_pointer - this.coords.p_single_fake);
                this.$cache.s_single.addClass("state_hover");
                break;
            case "from":
                this.coords.p_gap = this.toFixed(this.coords.p_pointer - this.coords.p_from_fake);
                this.$cache.s_from.addClass("state_hover");
                this.$cache.s_from.addClass("type_last");
                this.$cache.s_to.removeClass("type_last");
                break;
            case "to":
                this.coords.p_gap = this.toFixed(this.coords.p_pointer - this.coords.p_to_fake);
                this.$cache.s_to.addClass("state_hover");
                this.$cache.s_to.addClass("type_last");
                this.$cache.s_from.removeClass("type_last");
                break;
            case "both":
                this.coords.p_gap_left = this.toFixed(this.coords.p_pointer - this.coords.p_from_fake);
                this.coords.p_gap_right = this.toFixed(this.coords.p_to_fake - this.coords.p_pointer);
                this.$cache.s_to.removeClass("type_last");
                this.$cache.s_from.removeClass("type_last");
                break;
        }
    },

    /**
     * Then slider is disabled
     * appends extra layer with opacity
     */
    appendDisableMask: function () {
        this.$cache.cont.append(disable_html);
        this.$cache.cont.addClass("irs-disabled");
    },

    /**
     * Then slider is not disabled
     * remove disable mask
     */
    removeDisableMask: function () {
        this.$cache.cont.remove(".irs-disable-mask");
        this.$cache.cont.removeClass("irs-disabled");
    },

    /**
     * Remove slider instance
     * and unbind all events
     */
    remove: function () {
        this.$cache.cont.remove();
        this.$cache.cont = null;

        this.$cache.line.off("keydown.irs_" + this.plugin_count);

        this.$cache.body.off("touchmove.irs_" + this.plugin_count);
        this.$cache.body.off("mousemove.irs_" + this.plugin_count);

        this.$cache.win.off("touchend.irs_" + this.plugin_count);
        this.$cache.win.off("mouseup.irs_" + this.plugin_count);

        if (is_old_ie) {
            this.$cache.body.off("mouseup.irs_" + this.plugin_count);
            this.$cache.body.off("mouseleave.irs_" + this.plugin_count);
        }

        this.$cache.grid_labels = [];
        this.coords.big = [];
        this.coords.big_w = [];
        this.coords.big_p = [];
        this.coords.big_x = [];

        cancelAnimationFrame(this.raf_id);
    },

    /**
     * bind all slider events
     */
    bindEvents: function () {
        if (this.no_diapason) {
            return;
        }

        this.$cache.body.on("touchmove.irs_" + this.plugin_count, this.pointerMove.bind(this));
        this.$cache.body.on("mousemove.irs_" + this.plugin_count, this.pointerMove.bind(this));

        this.$cache.win.on("touchend.irs_" + this.plugin_count, this.pointerUp.bind(this));
        this.$cache.win.on("mouseup.irs_" + this.plugin_count, this.pointerUp.bind(this));

        this.$cache.line.on("touchstart.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
        this.$cache.line.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));

        this.$cache.line.on("focus.irs_" + this.plugin_count, this.pointerFocus.bind(this));

        if (this.options.drag_interval && this.options.type === "double") {
            this.$cache.bar.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "both"));
            this.$cache.bar.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "both"));
        } else {
            this.$cache.bar.on("touchstart.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
            this.$cache.bar.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
        }

        if (this.options.type === "single") {
            this.$cache.single.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "single"));
            this.$cache.s_single.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "single"));
            this.$cache.shad_single.on("touchstart.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));

            this.$cache.single.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "single"));
            this.$cache.s_single.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "single"));
            this.$cache.edge.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
            this.$cache.shad_single.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
        } else {
            this.$cache.single.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, null));
            this.$cache.single.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, null));

            this.$cache.from.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "from"));
            this.$cache.s_from.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "from"));
            this.$cache.to.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "to"));
            this.$cache.s_to.on("touchstart.irs_" + this.plugin_count, this.pointerDown.bind(this, "to"));
            this.$cache.shad_from.on("touchstart.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
            this.$cache.shad_to.on("touchstart.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));

            this.$cache.from.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "from"));
            this.$cache.s_from.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "from"));
            this.$cache.to.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "to"));
            this.$cache.s_to.on("mousedown.irs_" + this.plugin_count, this.pointerDown.bind(this, "to"));
            this.$cache.shad_from.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
            this.$cache.shad_to.on("mousedown.irs_" + this.plugin_count, this.pointerClick.bind(this, "click"));
        }

        if (this.options.keyboard) {
            this.$cache.line.on("keydown.irs_" + this.plugin_count, this.key.bind(this, "keyboard"));
        }

        if (is_old_ie) {
            this.$cache.body.on("mouseup.irs_" + this.plugin_count, this.pointerUp.bind(this));
            this.$cache.body.on("mouseleave.irs_" + this.plugin_count, this.pointerUp.bind(this));
        }
    },

    /**
     * Focus with tabIndex
     *
     * @param e {Object} event object
     */
    pointerFocus: function (e) {
        if (!this.target) {
            var x;
            var $handle;

            if (this.options.type === "single") {
                $handle = this.$cache.single;
            } else {
                $handle = this.$cache.from;
            }

            x = $handle.offset().left;
            x += ($handle.width() / 2) - 1;

            this.pointerClick("single", {preventDefault: function () {}, pageX: x});
        }
    },

    /**
     * Mousemove or touchmove
     * only for handlers
     *
     * @param e {Object} event object
     */
    pointerMove: function (e) {
        if (!this.dragging) {
            return;
        }

        var x = e.pageX || e.originalEvent.touches && e.originalEvent.touches[0].pageX;
        this.coords.x_pointer = x - this.coords.x_gap;

        this.calc();
    },

    /**
     * Mouseup or touchend
     * only for handlers
     *
     * @param e {Object} event object
     */
    pointerUp: function (e) {
        if (this.current_plugin !== this.plugin_count) {
            return;
        }

        if (this.is_active) {
            this.is_active = false;
        } else {
            return;
        }

        this.$cache.cont.find(".state_hover").removeClass("state_hover");

        this.force_redraw = true;

        if (is_old_ie) {
            $("*").prop("unselectable", false);
        }

        this.updateScene();
        this.restoreOriginalMinInterval();

        // callbacks call
        if ($.contains(this.$cache.cont[0], e.target) || this.dragging) {
            this.callOnFinish();
        }

        this.dragging = false;
    },

    /**
     * Mousedown or touchstart
     * only for handlers
     *
     * @param target {String|null}
     * @param e {Object} event object
     */
    pointerDown: function (target, e) {
        e.preventDefault();
        var x = e.pageX || e.originalEvent.touches && e.originalEvent.touches[0].pageX;
        if (e.button === 2) {
            return;
        }

        if (target === "both") {
            this.setTempMinInterval();
        }

        if (!target) {
            target = this.target || "from";
        }

        this.current_plugin = this.plugin_count;
        this.target = target;

        this.is_active = true;
        this.dragging = true;

        this.coords.x_gap = this.$cache.rs.offset().left;
        this.coords.x_pointer = x - this.coords.x_gap;

        this.calcPointerPercent();
        this.changeLevel(target);

        if (is_old_ie) {
            $("*").prop("unselectable", true);
        }

        this.$cache.line.trigger("focus");

        this.updateScene();
    },

    /**
     * Mousedown or touchstart
     * for other slider elements, like diapason line
     *
     * @param target {String}
     * @param e {Object} event object
     */
    pointerClick: function (target, e) {
        e.preventDefault();
        var x = e.pageX || e.originalEvent.touches && e.originalEvent.touches[0].pageX;
        if (e.button === 2) {
            return;
        }

        this.current_plugin = this.plugin_count;
        this.target = target;

        this.is_click = true;
        this.coords.x_gap = this.$cache.rs.offset().left;
        this.coords.x_pointer = +(x - this.coords.x_gap).toFixed();

        this.force_redraw = true;
        this.calc();

        this.$cache.line.trigger("focus");
    },

    /**
     * Keyborard controls for focused slider
     *
     * @param target {String}
     * @param e {Object} event object
     * @returns {boolean|undefined}
     */
    key: function (target, e) {
        if (this.current_plugin !== this.plugin_count || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey) {
            return;
        }

        switch (e.which) {
            case 83: // W
            case 65: // A
            case 40: // DOWN
            case 37: // LEFT
                e.preventDefault();
                this.moveByKey(false);
                break;

            case 87: // S
            case 68: // D
            case 38: // UP
            case 39: // RIGHT
                e.preventDefault();
                this.moveByKey(true);
                break;
        }

        return true;
    },

    /**
     * Move by key
     *
     * @param right {boolean} direction to move
     */
    moveByKey: function (right) {
        var p = this.coords.p_pointer;
        var p_step = (this.options.max - this.options.min) / 100;
        p_step = this.options.step / p_step;

        if (right) {
            p += p_step;
        } else {
            p -= p_step;
        }

        this.coords.x_pointer = this.toFixed(this.coords.w_rs / 100 * p);
        this.is_key = true;
        this.calc();
    },

    /**
     * Set visibility and content
     * of Min and Max labels
     */
    setMinMax: function () {
        if (!this.options) {
            return;
        }

        if (this.options.hide_min_max) {
            this.$cache.min[0].style.display = "none";
            this.$cache.max[0].style.display = "none";
            return;
        }

        if (this.options.values.length) {
            this.$cache.min.html(this.decorate(this.options.p_values[this.options.min]));
            this.$cache.max.html(this.decorate(this.options.p_values[this.options.max]));
        } else {
            var min_pretty = this._prettify(this.options.min);
            var max_pretty = this._prettify(this.options.max);

            this.result.min_pretty = min_pretty;
            this.result.max_pretty = max_pretty;

            this.$cache.min.html(this.decorate(min_pretty, this.options.min));
            this.$cache.max.html(this.decorate(max_pretty, this.options.max));
        }

        this.labels.w_min = this.$cache.min.outerWidth(false);
        this.labels.w_max = this.$cache.max.outerWidth(false);
    },

    /**
     * Then dragging interval, prevent interval collapsing
     * using min_interval option
     */
    setTempMinInterval: function () {
        var interval = this.result.to - this.result.from;

        if (this.old_min_interval === null) {
            this.old_min_interval = this.options.min_interval;
        }

        this.options.min_interval = interval;
    },

    /**
     * Restore min_interval option to original
     */
    restoreOriginalMinInterval: function () {
        if (this.old_min_interval !== null) {
            this.options.min_interval = this.old_min_interval;
            this.old_min_interval = null;
        }
    },

    // =============================================================================================================
    // Calculations

    /**
     * All calculations and measures start here
     *
     * @param update {boolean=}
     */
    calc: function (update) {
        if (!this.options) {
            return;
        }

        this.calc_count++;

        if (this.calc_count === 10 || update) {
            this.calc_count = 0;
            this.coords.w_rs = this.$cache.rs.outerWidth(false);

            this.calcHandlePercent();
        }

        if (!this.coords.w_rs) {
            return;
        }

        this.calcPointerPercent();
        var handle_x = this.getHandleX();

        if (this.target === "both") {
            this.coords.p_gap = 0;
            handle_x = this.getHandleX();
        }

        if (this.target === "click") {
            this.coords.p_gap = this.coords.p_handle / 2;
            handle_x = this.getHandleX();

            if (this.options.drag_interval) {
                this.target = "both_one";
            } else {
                this.target = this.chooseHandle(handle_x);
            }
        }

        switch (this.target) {
            case "base":
                var w = (this.options.max - this.options.min) / 100,
                    f = (this.result.from - this.options.min) / w,
                    t = (this.result.to - this.options.min) / w;

                this.coords.p_single_real = this.toFixed(f);
                this.coords.p_from_real = this.toFixed(f);
                this.coords.p_to_real = this.toFixed(t);

                this.coords.p_single_real = this.checkDiapason(this.coords.p_single_real, this.options.from_min, this.options.from_max);
                this.coords.p_from_real = this.checkDiapason(this.coords.p_from_real, this.options.from_min, this.options.from_max);
                this.coords.p_to_real = this.checkDiapason(this.coords.p_to_real, this.options.to_min, this.options.to_max);

                this.coords.p_single_fake = this.convertToFakePercent(this.coords.p_single_real);
                this.coords.p_from_fake = this.convertToFakePercent(this.coords.p_from_real);
                this.coords.p_to_fake = this.convertToFakePercent(this.coords.p_to_real);

                this.target = null;

                break;

            case "single":
                if (this.options.from_fixed) {
                    break;
                }

                this.coords.p_single_real = this.convertToRealPercent(handle_x);
                this.coords.p_single_real = this.calcWithStep(this.coords.p_single_real);
                this.coords.p_single_real = this.checkDiapason(this.coords.p_single_real, this.options.from_min, this.options.from_max);

                this.coords.p_single_fake = this.convertToFakePercent(this.coords.p_single_real);

                break;

            case "from":
                if (this.options.from_fixed) {
                    break;
                }

                this.coords.p_from_real = this.convertToRealPercent(handle_x);
                this.coords.p_from_real = this.calcWithStep(this.coords.p_from_real);
                if (this.coords.p_from_real > this.coords.p_to_real) {
                    this.coords.p_from_real = this.coords.p_to_real;
                }
                this.coords.p_from_real = this.checkDiapason(this.coords.p_from_real, this.options.from_min, this.options.from_max);
                this.coords.p_from_real = this.checkMinInterval(this.coords.p_from_real, this.coords.p_to_real, "from");
                this.coords.p_from_real = this.checkMaxInterval(this.coords.p_from_real, this.coords.p_to_real, "from");

                this.coords.p_from_fake = this.convertToFakePercent(this.coords.p_from_real);

                break;

            case "to":
                if (this.options.to_fixed) {
                    break;
                }

                this.coords.p_to_real = this.convertToRealPercent(handle_x);
                this.coords.p_to_real = this.calcWithStep(this.coords.p_to_real);
                if (this.coords.p_to_real < this.coords.p_from_real) {
                    this.coords.p_to_real = this.coords.p_from_real;
                }
                this.coords.p_to_real = this.checkDiapason(this.coords.p_to_real, this.options.to_min, this.options.to_max);
                this.coords.p_to_real = this.checkMinInterval(this.coords.p_to_real, this.coords.p_from_real, "to");
                this.coords.p_to_real = this.checkMaxInterval(this.coords.p_to_real, this.coords.p_from_real, "to");

                this.coords.p_to_fake = this.convertToFakePercent(this.coords.p_to_real);

                break;

            case "both":
                if (this.options.from_fixed || this.options.to_fixed) {
                    break;
                }

                handle_x = this.toFixed(handle_x + (this.coords.p_handle * 0.001));

                this.coords.p_from_real = this.convertToRealPercent(handle_x) - this.coords.p_gap_left;
                this.coords.p_from_real = this.calcWithStep(this.coords.p_from_real);
                this.coords.p_from_real = this.checkDiapason(this.coords.p_from_real, this.options.from_min, this.options.from_max);
                this.coords.p_from_real = this.checkMinInterval(this.coords.p_from_real, this.coords.p_to_real, "from");
                this.coords.p_from_fake = this.convertToFakePercent(this.coords.p_from_real);

                this.coords.p_to_real = this.convertToRealPercent(handle_x) + this.coords.p_gap_right;
                this.coords.p_to_real = this.calcWithStep(this.coords.p_to_real);
                this.coords.p_to_real = this.checkDiapason(this.coords.p_to_real, this.options.to_min, this.options.to_max);
                this.coords.p_to_real = this.checkMinInterval(this.coords.p_to_real, this.coords.p_from_real, "to");
                this.coords.p_to_fake = this.convertToFakePercent(this.coords.p_to_real);

                break;

            case "both_one":
                if (this.options.from_fixed || this.options.to_fixed) {
                    break;
                }

                var real_x = this.convertToRealPercent(handle_x),
                    from = this.result.from_percent,
                    to = this.result.to_percent,
                    full = to - from,
                    half = full / 2,
                    new_from = real_x - half,
                    new_to = real_x + half;

                if (new_from < 0) {
                    new_from = 0;
                    new_to = new_from + full;
                }

                if (new_to > 100) {
                    new_to = 100;
                    new_from = new_to - full;
                }

                this.coords.p_from_real = this.calcWithStep(new_from);
                this.coords.p_from_real = this.checkDiapason(this.coords.p_from_real, this.options.from_min, this.options.from_max);
                this.coords.p_from_fake = this.convertToFakePercent(this.coords.p_from_real);

                this.coords.p_to_real = this.calcWithStep(new_to);
                this.coords.p_to_real = this.checkDiapason(this.coords.p_to_real, this.options.to_min, this.options.to_max);
                this.coords.p_to_fake = this.convertToFakePercent(this.coords.p_to_real);

                break;
        }

        if (this.options.type === "single") {
            this.coords.p_bar_x = (this.coords.p_handle / 2);
            this.coords.p_bar_w = this.coords.p_single_fake;

            this.result.from_percent = this.coords.p_single_real;
            this.result.from = this.convertToValue(this.coords.p_single_real);
            this.result.from_pretty = this._prettify(this.result.from);

            if (this.options.values.length) {
                this.result.from_value = this.options.values[this.result.from];
            }
        } else {
            this.coords.p_bar_x = this.toFixed(this.coords.p_from_fake + (this.coords.p_handle / 2));
            this.coords.p_bar_w = this.toFixed(this.coords.p_to_fake - this.coords.p_from_fake);

            this.result.from_percent = this.coords.p_from_real;
            this.result.from = this.convertToValue(this.coords.p_from_real);
            this.result.from_pretty = this._prettify(this.result.from);
            this.result.to_percent = this.coords.p_to_real;
            this.result.to = this.convertToValue(this.coords.p_to_real);
            this.result.to_pretty = this._prettify(this.result.to);

            if (this.options.values.length) {
                this.result.from_value = this.options.values[this.result.from];
                this.result.to_value = this.options.values[this.result.to];
            }
        }

        this.calcMinMax();
        this.calcLabels();
    },

    /**
     * calculates pointer X in percent
     */
    calcPointerPercent: function () {
        if (!this.coords.w_rs) {
            this.coords.p_pointer = 0;
            return;
        }

        if (this.coords.x_pointer < 0 || isNaN(this.coords.x_pointer)  ) {
            this.coords.x_pointer = 0;
        } else if (this.coords.x_pointer > this.coords.w_rs) {
            this.coords.x_pointer = this.coords.w_rs;
        }

        this.coords.p_pointer = this.toFixed(this.coords.x_pointer / this.coords.w_rs * 100);
    },

    convertToRealPercent: function (fake) {
        var full = 100 - this.coords.p_handle;
        return fake / full * 100;
    },

    convertToFakePercent: function (real) {
        var full = 100 - this.coords.p_handle;
        return real / 100 * full;
    },

    getHandleX: function () {
        var max = 100 - this.coords.p_handle,
            x = this.toFixed(this.coords.p_pointer - this.coords.p_gap);

        if (x < 0) {
            x = 0;
        } else if (x > max) {
            x = max;
        }

        return x;
    },

    calcHandlePercent: function () {
        if (this.options.type === "single") {
            this.coords.w_handle = this.$cache.s_single.outerWidth(false);
        } else {
            this.coords.w_handle = this.$cache.s_from.outerWidth(false);
        }

        this.coords.p_handle = this.toFixed(this.coords.w_handle / this.coords.w_rs * 100);
    },

    /**
     * Find closest handle to pointer click
     *
     * @param real_x {Number}
     * @returns {String}
     */
    chooseHandle: function (real_x) {
        if (this.options.type === "single") {
            return "single";
        } else {
            var m_point = this.coords.p_from_real + ((this.coords.p_to_real - this.coords.p_from_real) / 2);
            if (real_x >= m_point) {
                return this.options.to_fixed ? "from" : "to";
            } else {
                return this.options.from_fixed ? "to" : "from";
            }
        }
    },

    /**
     * Measure Min and Max labels width in percent
     */
    calcMinMax: function () {
        if (!this.coords.w_rs) {
            return;
        }

        this.labels.p_min = this.labels.w_min / this.coords.w_rs * 100;
        this.labels.p_max = this.labels.w_max / this.coords.w_rs * 100;
    },

    /**
     * Measure labels width and X in percent
     */
    calcLabels: function () {
        if (!this.coords.w_rs || this.options.hide_from_to) {
            return;
        }

        if (this.options.type === "single") {

            this.labels.w_single = this.$cache.single.outerWidth(false);
            this.labels.p_single_fake = this.labels.w_single / this.coords.w_rs * 100;
            this.labels.p_single_left = this.coords.p_single_fake + (this.coords.p_handle / 2) - (this.labels.p_single_fake / 2);
            this.labels.p_single_left = this.checkEdges(this.labels.p_single_left, this.labels.p_single_fake);

        } else {

            this.labels.w_from = this.$cache.from.outerWidth(false);
            this.labels.p_from_fake = this.labels.w_from / this.coords.w_rs * 100;
            this.labels.p_from_left = this.coords.p_from_fake + (this.coords.p_handle / 2) - (this.labels.p_from_fake / 2);
            this.labels.p_from_left = this.toFixed(this.labels.p_from_left);
            this.labels.p_from_left = this.checkEdges(this.labels.p_from_left, this.labels.p_from_fake);

            this.labels.w_to = this.$cache.to.outerWidth(false);
            this.labels.p_to_fake = this.labels.w_to / this.coords.w_rs * 100;
            this.labels.p_to_left = this.coords.p_to_fake + (this.coords.p_handle / 2) - (this.labels.p_to_fake / 2);
            this.labels.p_to_left = this.toFixed(this.labels.p_to_left);
            this.labels.p_to_left = this.checkEdges(this.labels.p_to_left, this.labels.p_to_fake);

            this.labels.w_single = this.$cache.single.outerWidth(false);
            this.labels.p_single_fake = this.labels.w_single / this.coords.w_rs * 100;
            this.labels.p_single_left = ((this.labels.p_from_left + this.labels.p_to_left + this.labels.p_to_fake) / 2) - (this.labels.p_single_fake / 2);
            this.labels.p_single_left = this.toFixed(this.labels.p_single_left);
            this.labels.p_single_left = this.checkEdges(this.labels.p_single_left, this.labels.p_single_fake);

        }
    },

    // =============================================================================================================
    // Drawings

    /**
     * Main function called in request animation frame
     * to update everything
     */
    updateScene: function () {
        if (this.raf_id) {
            cancelAnimationFrame(this.raf_id);
            this.raf_id = null;
        }

        clearTimeout(this.update_tm);
        this.update_tm = null;

        if (!this.options) {
            return;
        }

        this.drawHandles();

        if (this.is_active) {
            this.raf_id = requestAnimationFrame(this.updateScene.bind(this));
        } else {
            this.update_tm = setTimeout(this.updateScene.bind(this), 300);
        }
    },

    /**
     * Draw handles
     */
    drawHandles: function () {
        this.coords.w_rs = this.$cache.rs.outerWidth(false);

        if (!this.coords.w_rs) {
            return;
        }

        if (this.coords.w_rs !== this.coords.w_rs_old) {
            this.target = "base";
            this.is_resize = true;
        }

        if (this.coords.w_rs !== this.coords.w_rs_old || this.force_redraw) {
            this.setMinMax();
            this.calc(true);
            this.drawLabels();
            if (this.options.grid) {
                this.calcGridMargin();
                this.calcGridLabels();
            }
            this.force_redraw = true;
            this.coords.w_rs_old = this.coords.w_rs;
            this.drawShadow();
        }

        if (!this.coords.w_rs) {
            return;
        }

        if (!this.dragging && !this.force_redraw && !this.is_key) {
            return;
        }

        if (this.old_from !== this.result.from || this.old_to !== this.result.to || this.force_redraw || this.is_key) {

            this.drawLabels();

            this.$cache.bar[0].style.left = this.coords.p_bar_x + "%";
            this.$cache.bar[0].style.width = this.coords.p_bar_w + "%";

            if (this.options.type === "single") {
                this.$cache.s_single[0].style.left = this.coords.p_single_fake + "%";

                this.$cache.single[0].style.left = this.labels.p_single_left + "%";
            } else {
                this.$cache.s_from[0].style.left = this.coords.p_from_fake + "%";
                this.$cache.s_to[0].style.left = this.coords.p_to_fake + "%";

                if (this.old_from !== this.result.from || this.force_redraw) {
                    this.$cache.from[0].style.left = this.labels.p_from_left + "%";
                }
                if (this.old_to !== this.result.to || this.force_redraw) {
                    this.$cache.to[0].style.left = this.labels.p_to_left + "%";
                }

                this.$cache.single[0].style.left = this.labels.p_single_left + "%";
            }

            this.writeToInput();

            if ((this.old_from !== this.result.from || this.old_to !== this.result.to) && !this.is_start) {
                this.$cache.input.trigger("change");
                this.$cache.input.trigger("input");
            }

            this.old_from = this.result.from;
            this.old_to = this.result.to;

            // callbacks call
            if (!this.is_resize && !this.is_update && !this.is_start && !this.is_finish) {
                this.callOnChange();
            }
            if (this.is_key || this.is_click) {
                this.is_key = false;
                this.is_click = false;
                this.callOnFinish();
            }

            this.is_update = false;
            this.is_resize = false;
            this.is_finish = false;
        }

        this.is_start = false;
        this.is_key = false;
        this.is_click = false;
        this.force_redraw = false;
    },

    /**
     * Draw labels
     * measure labels collisions
     * collapse close labels
     */
    drawLabels: function () {
        if (!this.options) {
            return;
        }

        var values_num = this.options.values.length;
        var p_values = this.options.p_values;
        var text_single;
        var text_from;
        var text_to;
        var from_pretty;
        var to_pretty;

        if (this.options.hide_from_to) {
            return;
        }

        if (this.options.type === "single") {

            if (values_num) {
                text_single = this.decorate(p_values[this.result.from]);
                this.$cache.single.html(text_single);
            } else {
                from_pretty = this._prettify(this.result.from);

                text_single = this.decorate(from_pretty, this.result.from);
                this.$cache.single.html(text_single);
            }

            this.calcLabels();

            if (this.labels.p_single_left < this.labels.p_min + 1) {
                this.$cache.min[0].style.visibility = "hidden";
            } else {
                this.$cache.min[0].style.visibility = "visible";
            }

            if (this.labels.p_single_left + this.labels.p_single_fake > 100 - this.labels.p_max - 1) {
                this.$cache.max[0].style.visibility = "hidden";
            } else {
                this.$cache.max[0].style.visibility = "visible";
            }

        } else {

            if (values_num) {

                if (this.options.decorate_both) {
                    text_single = this.decorate(p_values[this.result.from]);
                    text_single += this.options.values_separator;
                    text_single += this.decorate(p_values[this.result.to]);
                } else {
                    text_single = this.decorate(p_values[this.result.from] + this.options.values_separator + p_values[this.result.to]);
                }
                text_from = this.decorate(p_values[this.result.from]);
                text_to = this.decorate(p_values[this.result.to]);

                this.$cache.single.html(text_single);
                this.$cache.from.html(text_from);
                this.$cache.to.html(text_to);

            } else {
                from_pretty = this._prettify(this.result.from);
                to_pretty = this._prettify(this.result.to);

                if (this.options.decorate_both) {
                    text_single = this.decorate(from_pretty, this.result.from);
                    text_single += this.options.values_separator;
                    text_single += this.decorate(to_pretty, this.result.to);
                } else {
                    text_single = this.decorate(from_pretty + this.options.values_separator + to_pretty, this.result.to);
                }
                text_from = this.decorate(from_pretty, this.result.from);
                text_to = this.decorate(to_pretty, this.result.to);

                this.$cache.single.html(text_single);
                this.$cache.from.html(text_from);
                this.$cache.to.html(text_to);

            }

            this.calcLabels();

            var min = Math.min(this.labels.p_single_left, this.labels.p_from_left),
                single_left = this.labels.p_single_left + this.labels.p_single_fake,
                to_left = this.labels.p_to_left + this.labels.p_to_fake,
                max = Math.max(single_left, to_left);

            if (this.labels.p_from_left + this.labels.p_from_fake >= this.labels.p_to_left) {
                this.$cache.from[0].style.visibility = "hidden";
                this.$cache.to[0].style.visibility = "hidden";
                this.$cache.single[0].style.visibility = "visible";

                if (this.result.from === this.result.to) {
                    if (this.target === "from") {
                        this.$cache.from[0].style.visibility = "visible";
                    } else if (this.target === "to") {
                        this.$cache.to[0].style.visibility = "visible";
                    } else if (!this.target) {
                        this.$cache.from[0].style.visibility = "visible";
                    }
                    this.$cache.single[0].style.visibility = "hidden";
                    max = to_left;
                } else {
                    this.$cache.from[0].style.visibility = "hidden";
                    this.$cache.to[0].style.visibility = "hidden";
                    this.$cache.single[0].style.visibility = "visible";
                    max = Math.max(single_left, to_left);
                }
            } else {
                this.$cache.from[0].style.visibility = "visible";
                this.$cache.to[0].style.visibility = "visible";
                this.$cache.single[0].style.visibility = "hidden";
            }

            if (min < this.labels.p_min + 1) {
                this.$cache.min[0].style.visibility = "hidden";
            } else {
                this.$cache.min[0].style.visibility = "visible";
            }

            if (max > 100 - this.labels.p_max - 1) {
                this.$cache.max[0].style.visibility = "hidden";
            } else {
                this.$cache.max[0].style.visibility = "visible";
            }

        }
    },

    /**
     * Draw shadow intervals
     */
    drawShadow: function () {
        var o = this.options,
            c = this.$cache,

            is_from_min = typeof o.from_min === "number" && !isNaN(o.from_min),
            is_from_max = typeof o.from_max === "number" && !isNaN(o.from_max),
            is_to_min = typeof o.to_min === "number" && !isNaN(o.to_min),
            is_to_max = typeof o.to_max === "number" && !isNaN(o.to_max),

            from_min,
            from_max,
            to_min,
            to_max;

        if (o.type === "single") {
            if (o.from_shadow && (is_from_min || is_from_max)) {
                from_min = this.convertToPercent(is_from_min ? o.from_min : o.min);
                from_max = this.convertToPercent(is_from_max ? o.from_max : o.max) - from_min;
                from_min = this.toFixed(from_min - (this.coords.p_handle / 100 * from_min));
                from_max = this.toFixed(from_max - (this.coords.p_handle / 100 * from_max));
                from_min = from_min + (this.coords.p_handle / 2);

                c.shad_single[0].style.display = "block";
                c.shad_single[0].style.left = from_min + "%";
                c.shad_single[0].style.width = from_max + "%";
            } else {
                c.shad_single[0].style.display = "none";
            }
        } else {
            if (o.from_shadow && (is_from_min || is_from_max)) {
                from_min = this.convertToPercent(is_from_min ? o.from_min : o.min);
                from_max = this.convertToPercent(is_from_max ? o.from_max : o.max) - from_min;
                from_min = this.toFixed(from_min - (this.coords.p_handle / 100 * from_min));
                from_max = this.toFixed(from_max - (this.coords.p_handle / 100 * from_max));
                from_min = from_min + (this.coords.p_handle / 2);

                c.shad_from[0].style.display = "block";
                c.shad_from[0].style.left = from_min + "%";
                c.shad_from[0].style.width = from_max + "%";
            } else {
                c.shad_from[0].style.display = "none";
            }

            if (o.to_shadow && (is_to_min || is_to_max)) {
                to_min = this.convertToPercent(is_to_min ? o.to_min : o.min);
                to_max = this.convertToPercent(is_to_max ? o.to_max : o.max) - to_min;
                to_min = this.toFixed(to_min - (this.coords.p_handle / 100 * to_min));
                to_max = this.toFixed(to_max - (this.coords.p_handle / 100 * to_max));
                to_min = to_min + (this.coords.p_handle / 2);

                c.shad_to[0].style.display = "block";
                c.shad_to[0].style.left = to_min + "%";
                c.shad_to[0].style.width = to_max + "%";
            } else {
                c.shad_to[0].style.display = "none";
            }
        }
    },

    /**
     * Write values to input element
     */
    writeToInput: function () {
        if (this.options.type === "single") {
            if (this.options.values.length) {
                this.$cache.input.prop("value", this.result.from_value);
            } else {
                this.$cache.input.prop("value", this.result.from);
            }
            this.$cache.input.data("from", this.result.from);
        } else {
            if (this.options.values.length) {
                this.$cache.input.prop("value", this.result.from_value + this.options.input_values_separator + this.result.to_value);
            } else {
                this.$cache.input.prop("value", this.result.from + this.options.input_values_separator + this.result.to);
            }
            this.$cache.input.data("from", this.result.from);
            this.$cache.input.data("to", this.result.to);
        }
    },

    // =============================================================================================================
    // Callbacks

    callOnStart: function () {
        this.writeToInput();

        if (this.options.onStart && typeof this.options.onStart === "function") {
            if (this.options.scope) {
                this.options.onStart.call(this.options.scope, this.result);
            } else {
                this.options.onStart(this.result);
            }
        }
    },
    callOnChange: function () {
        this.writeToInput();

        if (this.options.onChange && typeof this.options.onChange === "function") {
            if (this.options.scope) {
                this.options.onChange.call(this.options.scope, this.result);
            } else {
                this.options.onChange(this.result);
            }
        }
    },
    callOnFinish: function () {
        this.writeToInput();

        if (this.options.onFinish && typeof this.options.onFinish === "function") {
            if (this.options.scope) {
                this.options.onFinish.call(this.options.scope, this.result);
            } else {
                this.options.onFinish(this.result);
            }
        }
    },
    callOnUpdate: function () {
        this.writeToInput();

        if (this.options.onUpdate && typeof this.options.onUpdate === "function") {
            if (this.options.scope) {
                this.options.onUpdate.call(this.options.scope, this.result);
            } else {
                this.options.onUpdate(this.result);
            }
        }
    },

    // =============================================================================================================
    // Service methods

    toggleInput: function () {
        this.$cache.input.toggleClass("irs-hidden-input");

        if (this.has_tab_index) {
            this.$cache.input.prop("tabindex", -1);
        } else {
            this.$cache.input.removeProp("tabindex");
        }

        this.has_tab_index = !this.has_tab_index;
    },

    /**
     * Convert real value to percent
     *
     * @param value {Number} X in real
     * @param no_min {boolean=} don't use min value
     * @returns {Number} X in percent
     */
    convertToPercent: function (value, no_min) {
        var diapason = this.options.max - this.options.min,
            one_percent = diapason / 100,
            val, percent;

        if (!diapason) {
            this.no_diapason = true;
            return 0;
        }

        if (no_min) {
            val = value;
        } else {
            val = value - this.options.min;
        }

        percent = val / one_percent;

        return this.toFixed(percent);
    },

    /**
     * Convert percent to real values
     *
     * @param percent {Number} X in percent
     * @returns {Number} X in real
     */
    convertToValue: function (percent) {
        var min = this.options.min,
            max = this.options.max,
            min_decimals = min.toString().split(".")[1],
            max_decimals = max.toString().split(".")[1],
            min_length, max_length,
            avg_decimals = 0,
            abs = 0;

        if (percent === 0) {
            return this.options.min;
        }
        if (percent === 100) {
            return this.options.max;
        }

        if (min_decimals) {
            min_length = min_decimals.length;
            avg_decimals = min_length;
        }
        if (max_decimals) {
            max_length = max_decimals.length;
            avg_decimals = max_length;
        }
        if (min_length && max_length) {
            avg_decimals = (min_length >= max_length) ? min_length : max_length;
        }

        if (min < 0) {
            abs = Math.abs(min);
            min = +(min + abs).toFixed(avg_decimals);
            max = +(max + abs).toFixed(avg_decimals);
        }

        var number = ((max - min) / 100 * percent) + min,
            string = this.options.step.toString().split(".")[1],
            result;

        if (string) {
            number = +number.toFixed(string.length);
        } else {
            number = number / this.options.step;
            number = number * this.options.step;

            number = +number.toFixed(0);
        }

        if (abs) {
            number -= abs;
        }

        if (string) {
            result = +number.toFixed(string.length);
        } else {
            result = this.toFixed(number);
        }

        if (result < this.options.min) {
            result = this.options.min;
        } else if (result > this.options.max) {
            result = this.options.max;
        }

        return result;
    },

    /**
     * Round percent value with step
     *
     * @param percent {Number}
     * @returns percent {Number} rounded
     */
    calcWithStep: function (percent) {
        var rounded = Math.round(percent / this.coords.p_step) * this.coords.p_step;

        if (rounded > 100) {
            rounded = 100;
        }
        if (percent === 100) {
            rounded = 100;
        }

        return this.toFixed(rounded);
    },

    checkMinInterval: function (p_current, p_next, type) {
        var o = this.options,
            current,
            next;

        if (!o.min_interval) {
            return p_current;
        }

        current = this.convertToValue(p_current);
        next = this.convertToValue(p_next);

        if (type === "from") {

            if (next - current < o.min_interval) {
                current = next - o.min_interval;
            }

        } else {

            if (current - next < o.min_interval) {
                current = next + o.min_interval;
            }

        }

        return this.convertToPercent(current);
    },

    checkMaxInterval: function (p_current, p_next, type) {
        var o = this.options,
            current,
            next;

        if (!o.max_interval) {
            return p_current;
        }

        current = this.convertToValue(p_current);
        next = this.convertToValue(p_next);

        if (type === "from") {

            if (next - current > o.max_interval) {
                current = next - o.max_interval;
            }

        } else {

            if (current - next > o.max_interval) {
                current = next + o.max_interval;
            }

        }

        return this.convertToPercent(current);
    },

    checkDiapason: function (p_num, min, max) {
        var num = this.convertToValue(p_num),
            o = this.options;

        if (typeof min !== "number") {
            min = o.min;
        }

        if (typeof max !== "number") {
            max = o.max;
        }

        if (num < min) {
            num = min;
        }

        if (num > max) {
            num = max;
        }

        return this.convertToPercent(num);
    },

    toFixed: function (num) {
        num = num.toFixed(20);
        return +num;
    },

    _prettify: function (num) {
        if (!this.options.prettify_enabled) {
            return num;
        }

        if (this.options.prettify && typeof this.options.prettify === "function") {
            return this.options.prettify(num);
        } else {
            return this.prettify(num);
        }
    },

    prettify: function (num) {
        var n = num.toString();
        return n.replace(/(\d{1,3}(?=(?:\d\d\d)+(?!\d)))/g, "$1" + this.options.prettify_separator);
    },

    checkEdges: function (left, width) {
        if (!this.options.force_edges) {
            return this.toFixed(left);
        }

        if (left < 0) {
            left = 0;
        } else if (left > 100 - width) {
            left = 100 - width;
        }

        return this.toFixed(left);
    },

    validate: function () {
        var o = this.options,
            r = this.result,
            v = o.values,
            vl = v.length,
            value,
            i;

        if (typeof o.min === "string") o.min = +o.min;
        if (typeof o.max === "string") o.max = +o.max;
        if (typeof o.from === "string") o.from = +o.from;
        if (typeof o.to === "string") o.to = +o.to;
        if (typeof o.step === "string") o.step = +o.step;

        if (typeof o.from_min === "string") o.from_min = +o.from_min;
        if (typeof o.from_max === "string") o.from_max = +o.from_max;
        if (typeof o.to_min === "string") o.to_min = +o.to_min;
        if (typeof o.to_max === "string") o.to_max = +o.to_max;

        if (typeof o.grid_num === "string") o.grid_num = +o.grid_num;

        if (o.max < o.min) {
            o.max = o.min;
        }

        if (vl) {
            o.p_values = [];
            o.min = 0;
            o.max = vl - 1;
            o.step = 1;
            o.grid_num = o.max;
            o.grid_snap = true;

            for (i = 0; i < vl; i++) {
                value = +v[i];

                if (!isNaN(value)) {
                    v[i] = value;
                    value = this._prettify(value);
                } else {
                    value = v[i];
                }

                o.p_values.push(value);
            }
        }

        if (typeof o.from !== "number" || isNaN(o.from)) {
            o.from = o.min;
        }

        if (typeof o.to !== "number" || isNaN(o.to)) {
            o.to = o.max;
        }

        if (o.type === "single") {

            if (o.from < o.min) o.from = o.min;
            if (o.from > o.max) o.from = o.max;

        } else {

            if (o.from < o.min) o.from = o.min;
            if (o.from > o.max) o.from = o.max;

            if (o.to < o.min) o.to = o.min;
            if (o.to > o.max) o.to = o.max;

            if (this.update_check.from) {

                if (this.update_check.from !== o.from) {
                    if (o.from > o.to) o.from = o.to;
                }
                if (this.update_check.to !== o.to) {
                    if (o.to < o.from) o.to = o.from;
                }

            }

            if (o.from > o.to) o.from = o.to;
            if (o.to < o.from) o.to = o.from;

        }

        if (typeof o.step !== "number" || isNaN(o.step) || !o.step || o.step < 0) {
            o.step = 1;
        }

        if (typeof o.from_min === "number" && o.from < o.from_min) {
            o.from = o.from_min;
        }

        if (typeof o.from_max === "number" && o.from > o.from_max) {
            o.from = o.from_max;
        }

        if (typeof o.to_min === "number" && o.to < o.to_min) {
            o.to = o.to_min;
        }

        if (typeof o.to_max === "number" && o.from > o.to_max) {
            o.to = o.to_max;
        }

        if (r) {
            if (r.min !== o.min) {
                r.min = o.min;
            }

            if (r.max !== o.max) {
                r.max = o.max;
            }

            if (r.from < r.min || r.from > r.max) {
                r.from = o.from;
            }

            if (r.to < r.min || r.to > r.max) {
                r.to = o.to;
            }
        }

        if (typeof o.min_interval !== "number" || isNaN(o.min_interval) || !o.min_interval || o.min_interval < 0) {
            o.min_interval = 0;
        }

        if (typeof o.max_interval !== "number" || isNaN(o.max_interval) || !o.max_interval || o.max_interval < 0) {
            o.max_interval = 0;
        }

        if (o.min_interval && o.min_interval > o.max - o.min) {
            o.min_interval = o.max - o.min;
        }

        if (o.max_interval && o.max_interval > o.max - o.min) {
            o.max_interval = o.max - o.min;
        }
    },

    decorate: function (num, original) {
        var decorated = "",
            o = this.options;

        if (o.prefix) {
            decorated += o.prefix;
        }

        decorated += num;

        if (o.max_postfix) {
            if (o.values.length && num === o.p_values[o.max]) {
                decorated += o.max_postfix;
                if (o.postfix) {
                    decorated += " ";
                }
            } else if (original === o.max) {
                decorated += o.max_postfix;
                if (o.postfix) {
                    decorated += " ";
                }
            }
        }

        if (o.postfix) {
            decorated += o.postfix;
        }

        return decorated;
    },

    updateFrom: function () {
        this.result.from = this.options.from;
        this.result.from_percent = this.convertToPercent(this.result.from);
        this.result.from_pretty = this._prettify(this.result.from);
        if (this.options.values) {
            this.result.from_value = this.options.values[this.result.from];
        }
    },

    updateTo: function () {
        this.result.to = this.options.to;
        this.result.to_percent = this.convertToPercent(this.result.to);
        this.result.to_pretty = this._prettify(this.result.to);
        if (this.options.values) {
            this.result.to_value = this.options.values[this.result.to];
        }
    },

    updateResult: function () {
        this.result.min = this.options.min;
        this.result.max = this.options.max;
        this.updateFrom();
        this.updateTo();
    },

    // =============================================================================================================
    // Grid

    appendGrid: function () {
        if (!this.options.grid) {
            return;
        }

        var o = this.options,
            i, z,

            total = o.max - o.min,
            big_num = o.grid_num,
            big_p = 0,
            big_w = 0,

            small_max = 4,
            local_small_max,
            small_p,
            small_w = 0,

            result,
            html = '';

        this.calcGridMargin();

        if (o.grid_snap) {

            if (total > 50) {
                big_num = 50 / o.step;
                big_p = this.toFixed(o.step / 0.5);
            } else {
                big_num = total / o.step;
                big_p = this.toFixed(o.step / (total / 100));
            }

        } else {
            big_p = this.toFixed(100 / big_num);
        }

        if (big_num > 4) {
            small_max = 3;
        }
        if (big_num > 7) {
            small_max = 2;
        }
        if (big_num > 14) {
            small_max = 1;
        }
        if (big_num > 28) {
            small_max = 0;
        }

        for (i = 0; i < big_num + 1; i++) {
            local_small_max = small_max;

            big_w = this.toFixed(big_p * i);

            if (big_w > 100) {
                big_w = 100;
            }
            this.coords.big[i] = big_w;

            small_p = (big_w - (big_p * (i - 1))) / (local_small_max + 1);

            for (z = 1; z <= local_small_max; z++) {
                if (big_w === 0) {
                    break;
                }

                small_w = this.toFixed(big_w - (small_p * z));

                html += '<span class="irs-grid-pol small" style="left: ' + small_w + '%"></span>';
            }

            html += '<span class="irs-grid-pol" style="left: ' + big_w + '%"></span>';

            result = this.convertToValue(big_w);
            if (o.values.length) {
                result = o.p_values[result];
            } else {
                result = this._prettify(result);
            }

            html += '<span class="irs-grid-text js-grid-text-' + i + '" style="left: ' + big_w + '%">' + result + '</span>';
        }
        this.coords.big_num = Math.ceil(big_num + 1);

        this.$cache.cont.addClass("irs-with-grid");
        this.$cache.grid.html(html);
        this.cacheGridLabels();
    },

    cacheGridLabels: function () {
        var $label, i,
            num = this.coords.big_num;

        for (i = 0; i < num; i++) {
            $label = this.$cache.grid.find(".js-grid-text-" + i);
            this.$cache.grid_labels.push($label);
        }

        this.calcGridLabels();
    },

    calcGridLabels: function () {
        var i, label, start = [], finish = [],
            num = this.coords.big_num;

        for (i = 0; i < num; i++) {
            this.coords.big_w[i] = this.$cache.grid_labels[i].outerWidth(false);
            this.coords.big_p[i] = this.toFixed(this.coords.big_w[i] / this.coords.w_rs * 100);
            this.coords.big_x[i] = this.toFixed(this.coords.big_p[i] / 2);

            start[i] = this.toFixed(this.coords.big[i] - this.coords.big_x[i]);
            finish[i] = this.toFixed(start[i] + this.coords.big_p[i]);
        }

        if (this.options.force_edges) {
            if (start[0] < -this.coords.grid_gap) {
                start[0] = -this.coords.grid_gap;
                finish[0] = this.toFixed(start[0] + this.coords.big_p[0]);

                this.coords.big_x[0] = this.coords.grid_gap;
            }

            if (finish[num - 1] > 100 + this.coords.grid_gap) {
                finish[num - 1] = 100 + this.coords.grid_gap;
                start[num - 1] = this.toFixed(finish[num - 1] - this.coords.big_p[num - 1]);

                this.coords.big_x[num - 1] = this.toFixed(this.coords.big_p[num - 1] - this.coords.grid_gap);
            }
        }

        this.calcGridCollision(2, start, finish);
        this.calcGridCollision(4, start, finish);

        for (i = 0; i < num; i++) {
            label = this.$cache.grid_labels[i][0];

            if (this.coords.big_x[i] !== Number.POSITIVE_INFINITY) {
                label.style.marginLeft = -this.coords.big_x[i] + "%";
            }
        }
    },

    // Collisions Calc Beta
    // TODO: Refactor then have plenty of time
    calcGridCollision: function (step, start, finish) {
        var i, next_i, label,
            num = this.coords.big_num;

        for (i = 0; i < num; i += step) {
            next_i = i + (step / 2);
            if (next_i >= num) {
                break;
            }

            label = this.$cache.grid_labels[next_i][0];

            if (finish[i] <= start[next_i]) {
                label.style.visibility = "visible";
            } else {
                label.style.visibility = "hidden";
            }
        }
    },

    calcGridMargin: function () {
        if (!this.options.grid_margin) {
            return;
        }

        this.coords.w_rs = this.$cache.rs.outerWidth(false);
        if (!this.coords.w_rs) {
            return;
        }

        if (this.options.type === "single") {
            this.coords.w_handle = this.$cache.s_single.outerWidth(false);
        } else {
            this.coords.w_handle = this.$cache.s_from.outerWidth(false);
        }
        this.coords.p_handle = this.toFixed(this.coords.w_handle  / this.coords.w_rs * 100);
        this.coords.grid_gap = this.toFixed((this.coords.p_handle / 2) - 0.1);

        this.$cache.grid[0].style.width = this.toFixed(100 - this.coords.p_handle) + "%";
        this.$cache.grid[0].style.left = this.coords.grid_gap + "%";
    },

    // =============================================================================================================
    // Public methods

    update: function (options) {
        if (!this.input) {
            return;
        }

        this.is_update = true;

        this.options.from = this.result.from;
        this.options.to = this.result.to;
        this.update_check.from = this.result.from;
        this.update_check.to = this.result.to;

        this.options = $.extend(this.options, options);
        this.validate();
        this.updateResult(options);

        this.toggleInput();
        this.remove();
        this.init(true);
    },

    reset: function () {
        if (!this.input) {
            return;
        }

        this.updateResult();
        this.update();
    },

    destroy: function () {
        if (!this.input) {
            return;
        }

        this.toggleInput();
        this.$cache.input.prop("readonly", false);
        $.data(this.input, "ionRangeSlider", null);

        this.remove();
        this.input = null;
        this.options = null;
    }
};

$.fn.ionRangeSlider = function (options) {
    return this.each(function() {
        if (!$.data(this, "ionRangeSlider")) {
            $.data(this, "ionRangeSlider", new IonRangeSlider(this, options, plugin_count++));
        }
    });
};

// =================================================================================================================
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];
    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
        window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
        window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame']
            || window[vendors[x]+'CancelRequestAnimationFrame'];
    }

    if (!window.requestAnimationFrame)
        window.requestAnimationFrame = function(callback, element) {
            var currTime = new Date().getTime();
            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
            var id = window.setTimeout(function() { callback(currTime + timeToCall); },
                timeToCall);
            lastTime = currTime + timeToCall;
            return id;
        };

    if (!window.cancelAnimationFrame)
        window.cancelAnimationFrame = function(id) {
            clearTimeout(id);
        };
}());

}));