/*!
 * Bootstrap Colorpicker
 * http://mjolnic.github.io/bootstrap-colorpicker/
 *
 * Originally written by (c) 2012 Stefan Petre
 * Licensed under the Apache License v2.0
 * http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 * @todo Update DOCS
 */
(function ($) {
  // Color object
  const Color = function (val) {
    this.value = {
      h: 0,
      s: 0,
      b: 0,
      a: 1,
    };
    this.origFormat = null; // original string format
    if (val) {
      if (val.toLowerCase !== undefined) {
        this.setColor(val);
      } else if (val.h !== undefined) {
        this.value = val;
      }
    }
  };

  Color.prototype = {
    constructor: Color,
    _sanitizeNumber(val) {
      if (typeof val === 'number') {
        return val;
      }
      if (isNaN(val) || (val === null) || (val === '') || (val === undefined)) {
        return 1;
      }
      if (val.toLowerCase !== undefined) {
        return parseFloat(val);
      }
      return 1;
    },
    // parse a string to HSB
    setColor(strVal) {
      strVal = strVal.toLowerCase();
      this.value = this.stringToHSB(strVal) ||  {
        h: 0,
        s: 0,
        b: 0,
        a: 1,
      };
    },
    stringToHSB(strVal) {
      strVal = strVal.toLowerCase();
      const that = this;
      let result = false;
      $.each(this.stringParsers, (i, parser) => {
        const match = parser.re.exec(strVal);
        const values = match && parser.parse.apply(that, [match]);
        const format = parser.format || 'rgba';
        if (values) {
          if (format.match(/hsla?/)) {
            result = that.RGBtoHSB.apply(that, that.HSLtoRGB.apply(that, values));
          } else {
            result = that.RGBtoHSB.apply(that, values);
          }
          that.origFormat = format;
          return false;
        }
        return true;
      });
      return result;
    },
    setHue(h) {
      this.value.h = 1 - h;
    },
    setSaturation(s) {
      this.value.s = s;
    },
    setBrightness(b) {
      this.value.b = 1 - b;
    },
    setAlpha(a) {
      this.value.a = parseInt((1 - a) * 100, 10) / 100;
    },
    toRGB(h, s, v, a) {
      h = h || this.value.h;
      s = s || this.value.s;
      v = v || this.value.b;
      a = a || this.value.a;

      let r; let g; let b; let i; let f; let p; let q; let
        t;
      if (h && s === undefined && v === undefined) {
        s = h.s, v = h.v, h = h.h;
      }
      i = Math.floor(h * 6);
      f = h * 6 - i;
      p = v * (1 - s);
      q = v * (1 - f * s);
      t = v * (1 - (1 - f) * s);
      switch (i % 6) {
        case 0:
          r = v, g = t, b = p;
          break;
        case 1:
          r = q, g = v, b = p;
          break;
        case 2:
          r = p, g = v, b = t;
          break;
        case 3:
          r = p, g = q, b = v;
          break;
        case 4:
          r = t, g = p, b = v;
          break;
        case 5:
          r = v, g = p, b = q;
          break;
      }
      return {
        r: Math.floor(r * 255),
        g: Math.floor(g * 255),
        b: Math.floor(b * 255),
        a,
      };
    },
    toHex(h, s, b, a) {
      const rgb = this.toRGB(h, s, b, a);
      return `#${((1 << 24) | (parseInt(rgb.r) << 16) | (parseInt(rgb.g) << 8) | parseInt(rgb.b)).toString(16).substr(1)}`;
    },
    toHSL(h, s, b, a) {
      h = h || this.value.h;
      s = s || this.value.s;
      b = b || this.value.b;
      a = a || this.value.a;

      const H = h;
      let L = (2 - s) * b;
      let S = s * b;
      if (L > 0 && L <= 1) {
        S /= L;
      } else {
        S /= 2 - L;
      }
      L /= 2;
      if (S > 1) {
        S = 1;
      }
      return {
        h: isNaN(H) ? 0 : H,
        s: isNaN(S) ? 0 : S,
        l: isNaN(L) ? 0 : L,
        a: isNaN(a) ? 0 : a,
      };
    },
    RGBtoHSB(r, g, b, a) {
      r /= 255;
      g /= 255;
      b /= 255;

      let H; let S; let V; let
        C;
      V = Math.max(r, g, b);
      C = V - Math.min(r, g, b);
      H = (C === 0 ? null
        : V === r ? (g - b) / C
          : V === g ? (b - r) / C + 2
            : (r - g) / C + 4
      );
      H = ((H + 360) % 6) * 60 / 360;
      S = C === 0 ? 0 : C / V;
      return {
        h: this._sanitizeNumber(H),
        s: S,
        b: V,
        a: this._sanitizeNumber(a),
      };
    },
    HueToRGB(p, q, h) {
      if (h < 0) {
        h += 1;
      } else if (h > 1) {
        h -= 1;
      }
      if ((h * 6) < 1) {
        return p + (q - p) * h * 6;
      } if ((h * 2) < 1) {
        return q;
      } if ((h * 3) < 2) {
        return p + (q - p) * ((2 / 3) - h) * 6;
      }
      return p;
    },
    HSLtoRGB(h, s, l, a) {
      if (s < 0) {
        s = 0;
      }
      let q;
      if (l <= 0.5) {
        q = l * (1 + s);
      } else {
        q = l + s - (l * s);
      }

      const p = 2 * l - q;

      const tr = h + (1 / 3);
      const tg = h;
      const tb = h - (1 / 3);

      const r = Math.round(this.HueToRGB(p, q, tr) * 255);
      const g = Math.round(this.HueToRGB(p, q, tg) * 255);
      const b = Math.round(this.HueToRGB(p, q, tb) * 255);
      return [r, g, b, this._sanitizeNumber(a)];
    },
    toString(format) {
      format = format ||  'rgba';
      switch (format) {
        case 'rgb':
          {
            var rgb = this.toRGB();
            return `rgb(${rgb.r},${rgb.g},${rgb.b})`;
          }
          break;
        case 'rgba':
          {
            var rgb = this.toRGB();
            return `rgba(${rgb.r},${rgb.g},${rgb.b},${rgb.a})`;
          }
          break;
        case 'hsl':
          {
            var hsl = this.toHSL();
            return `hsl(${Math.round(hsl.h * 360)},${Math.round(hsl.s * 100)}%,${Math.round(hsl.l * 100)}%)`;
          }
          break;
        case 'hsla':
          {
            var hsl = this.toHSL();
            return `hsla(${Math.round(hsl.h * 360)},${Math.round(hsl.s * 100)}%,${Math.round(hsl.l * 100)}%,${hsl.a})`;
          }
          break;
        case 'hex':
          {
            return this.toHex();
          }
          break;
        default:
          {
            return false;
          }
          break;
      }
    },
    // a set of RE's that can match strings and generate color tuples.
    // from John Resig color plugin
    // https://github.com/jquery/jquery-color/
    stringParsers: [{
      re: /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/,
      format: 'hex',
      parse(execResult) {
        return [
          parseInt(execResult[1], 16),
          parseInt(execResult[2], 16),
          parseInt(execResult[3], 16),
          1,
        ];
      },
    }, {
      re: /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/,
      format: 'hex',
      parse(execResult) {
        return [
          parseInt(execResult[1] + execResult[1], 16),
          parseInt(execResult[2] + execResult[2], 16),
          parseInt(execResult[3] + execResult[3], 16),
          1,
        ];
      },
    }, {
      re: /rgb\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*?\)/,
      format: 'rgb',
      parse(execResult) {
        return [
          execResult[1],
          execResult[2],
          execResult[3],
          1,
        ];
      },
    }, {
      re: /rgb\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*?\)/,
      format: 'rgb',
      parse(execResult) {
        return [
          2.55 * execResult[1],
          2.55 * execResult[2],
          2.55 * execResult[3],
          1,
        ];
      },
    }, {
      re: /rgba\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
      format: 'rgba',
      parse(execResult) {
        return [
          execResult[1],
          execResult[2],
          execResult[3],
          execResult[4],
        ];
      },
    }, {
      re: /rgba\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
      format: 'rgba',
      parse(execResult) {
        return [
          2.55 * execResult[1],
          2.55 * execResult[2],
          2.55 * execResult[3],
          execResult[4],
        ];
      },
    }, {
      re: /hsl\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*?\)/,
      format: 'hsl',
      parse(execResult) {
        return [
          execResult[1] / 360,
          execResult[2] / 100,
          execResult[3] / 100,
          execResult[4],
        ];
      },
    }, {
      re: /hsla\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
      format: 'hsla',
      parse(execResult) {
        return [
          execResult[1] / 360,
          execResult[2] / 100,
          execResult[3] / 100,
          execResult[4],
        ];
      },
    }, {
      // predefined color name
      re: /^([a-z]{3,})$/,
      format: 'alias',
      parse(execResult) {
        const hexval = this.colorNameToHex(execResult[0]) ||  '#000000';
        const match = this.stringParsers[0].re.exec(hexval);
        const values = match && this.stringParsers[0].parse.apply(this, [match]);
        return values;
      },
    }],
    colorNameToHex(name) {
      // 140 predefined colors from the HTML Colors spec
      const colors = {
        aliceblue: '#f0f8ff',
        antiquewhite: '#faebd7',
        aqua: '#00ffff',
        aquamarine: '#7fffd4',
        azure: '#f0ffff',
        beige: '#f5f5dc',
        bisque: '#ffe4c4',
        black: '#000000',
        blanchedalmond: '#ffebcd',
        blue: '#0000ff',
        blueviolet: '#8a2be2',
        brown: '#a52a2a',
        burlywood: '#deb887',
        cadetblue: '#5f9ea0',
        chartreuse: '#7fff00',
        chocolate: '#d2691e',
        coral: '#ff7f50',
        cornflowerblue: '#6495ed',
        cornsilk: '#fff8dc',
        crimson: '#dc143c',
        cyan: '#00ffff',
        darkblue: '#00008b',
        darkcyan: '#008b8b',
        darkgoldenrod: '#b8860b',
        darkgray: '#a9a9a9',
        darkgreen: '#006400',
        darkkhaki: '#bdb76b',
        darkmagenta: '#8b008b',
        darkolivegreen: '#556b2f',
        darkorange: '#ff8c00',
        darkorchid: '#9932cc',
        darkred: '#8b0000',
        darksalmon: '#e9967a',
        darkseagreen: '#8fbc8f',
        darkslateblue: '#483d8b',
        darkslategray: '#2f4f4f',
        darkturquoise: '#00ced1',
        darkviolet: '#9400d3',
        deeppink: '#ff1493',
        deepskyblue: '#00bfff',
        dimgray: '#696969',
        dodgerblue: '#1e90ff',
        firebrick: '#b22222',
        floralwhite: '#fffaf0',
        forestgreen: '#228b22',
        fuchsia: '#ff00ff',
        gainsboro: '#dcdcdc',
        ghostwhite: '#f8f8ff',
        gold: '#ffd700',
        goldenrod: '#daa520',
        gray: '#808080',
        green: '#008000',
        greenyellow: '#adff2f',
        honeydew: '#f0fff0',
        hotpink: '#ff69b4',
        'indianred ': '#cd5c5c',
        'indigo ': '#4b0082',
        ivory: '#fffff0',
        khaki: '#f0e68c',
        lavender: '#e6e6fa',
        lavenderblush: '#fff0f5',
        lawngreen: '#7cfc00',
        lemonchiffon: '#fffacd',
        lightblue: '#add8e6',
        lightcoral: '#f08080',
        lightcyan: '#e0ffff',
        lightgoldenrodyellow: '#fafad2',
        lightgrey: '#d3d3d3',
        lightgreen: '#90ee90',
        lightpink: '#ffb6c1',
        lightsalmon: '#ffa07a',
        lightseagreen: '#20b2aa',
        lightskyblue: '#87cefa',
        lightslategray: '#778899',
        lightsteelblue: '#b0c4de',
        lightyellow: '#ffffe0',
        lime: '#00ff00',
        limegreen: '#32cd32',
        linen: '#faf0e6',
        magenta: '#ff00ff',
        maroon: '#800000',
        mediumaquamarine: '#66cdaa',
        mediumblue: '#0000cd',
        mediumorchid: '#ba55d3',
        mediumpurple: '#9370d8',
        mediumseagreen: '#3cb371',
        mediumslateblue: '#7b68ee',
        mediumspringgreen: '#00fa9a',
        mediumturquoise: '#48d1cc',
        mediumvioletred: '#c71585',
        midnightblue: '#191970',
        mintcream: '#f5fffa',
        mistyrose: '#ffe4e1',
        moccasin: '#ffe4b5',
        navajowhite: '#ffdead',
        navy: '#000080',
        oldlace: '#fdf5e6',
        olive: '#808000',
        olivedrab: '#6b8e23',
        orange: '#ffa500',
        orangered: '#ff4500',
        orchid: '#da70d6',
        palegoldenrod: '#eee8aa',
        palegreen: '#98fb98',
        paleturquoise: '#afeeee',
        palevioletred: '#d87093',
        papayawhip: '#ffefd5',
        peachpuff: '#ffdab9',
        peru: '#cd853f',
        pink: '#ffc0cb',
        plum: '#dda0dd',
        powderblue: '#b0e0e6',
        purple: '#800080',
        red: '#ff0000',
        rosybrown: '#bc8f8f',
        royalblue: '#4169e1',
        saddlebrown: '#8b4513',
        salmon: '#fa8072',
        sandybrown: '#f4a460',
        seagreen: '#2e8b57',
        seashell: '#fff5ee',
        sienna: '#a0522d',
        silver: '#c0c0c0',
        skyblue: '#87ceeb',
        slateblue: '#6a5acd',
        slategray: '#708090',
        snow: '#fffafa',
        springgreen: '#00ff7f',
        steelblue: '#4682b4',
        tan: '#d2b48c',
        teal: '#008080',
        thistle: '#d8bfd8',
        tomato: '#ff6347',
        turquoise: '#40e0d0',
        violet: '#ee82ee',
        wheat: '#f5deb3',
        white: '#ffffff',
        whitesmoke: '#f5f5f5',
        yellow: '#ffff00',
        yellowgreen: '#9acd32',
      };

      if (typeof colors[name.toLowerCase()] !== 'undefined') {
        return colors[name.toLowerCase()];
      }
      return false;
    },
  };

  const defaults = {
    horizontal: false, // horizontal mode layout ?
    inline: false, // forces to show the colorpicker as an inline element
    color: false, // forces a color
    format: false, // forces a format
    input: 'input', // children input selector
    container: false, // container selector
    component: '.add-on, .input-group-addon', // children component selector
    sliders: {
      saturation: {
        maxLeft: 100,
        maxTop: 100,
        callLeft: 'setSaturation',
        callTop: 'setBrightness',
      },
      hue: {
        maxLeft: 0,
        maxTop: 100,
        callLeft: false,
        callTop: 'setHue',
      },
      alpha: {
        maxLeft: 0,
        maxTop: 100,
        callLeft: false,
        callTop: 'setAlpha',
      },
    },
    slidersHorz: {
      saturation: {
        maxLeft: 100,
        maxTop: 100,
        callLeft: 'setSaturation',
        callTop: 'setBrightness',
      },
      hue: {
        maxLeft: 100,
        maxTop: 0,
        callLeft: 'setHue',
        callTop: false,
      },
      alpha: {
        maxLeft: 100,
        maxTop: 0,
        callLeft: 'setAlpha',
        callTop: false,
      },
    },
    template: '<div class="colorpicker dropdown-menu">'
            + '<div class="colorpicker-saturation"><i><b></b></i></div>'
            + '<div class="colorpicker-hue"><i></i></div>'
            + '<div class="colorpicker-alpha"><i></i></div>'
            + '<div class="colorpicker-color"><div /></div>'
            + '</div>',
  };

  const Colorpicker = function (element, options) {
    this.element = $(element).addClass('colorpicker-element');
    this.options = $.extend({}, defaults, this.element.data(), options);
    this.component = this.options.component;
    this.component = (this.component !== false) ? this.element.find(this.component) : false;
    if (this.component && (this.component.length === 0)) {
      this.component = false;
    }
    this.container = (this.options.container === true) ? this.element : this.options.container;
    this.container = (this.container !== false) ? $(this.container) : false;

    // Is the element an input? Should we search inside for any input?
    this.input = this.element.is('input') ? this.element : (this.options.input
      ? this.element.find(this.options.input) : false);
    if (this.input && (this.input.length === 0)) {
      this.input = false;
    }
    // Set HSB color
    this.color = new Color(this.options.color !== false ? this.options.color : this.getValue());
    this.format = this.options.format !== false ? this.options.format : this.color.origFormat;

    // Setup picker
    this.picker = $(this.options.template);
    if (this.options.inline) {
      this.picker.addClass('colorpicker-inline colorpicker-visible');
    } else {
      this.picker.addClass('colorpicker-hidden');
    }
    if (this.options.horizontal) {
      this.picker.addClass('colorpicker-horizontal');
    }
    if (this.format === 'rgba' || this.format === 'hsla') {
      this.picker.addClass('colorpicker-with-alpha');
    }
    this.picker.on('mousedown.colorpicker', $.proxy(this.mousedown, this));
    this.picker.appendTo(this.container ? this.container : $('body'));

    // Bind events
    if (this.input !== false) {
      this.input.on({
        'keyup.colorpicker': $.proxy(this.keyup, this),
      });
      if (this.component === false) {
        this.element.on({
          'focus.colorpicker': $.proxy(this.show, this),
        });
      }
      if (this.options.inline === false) {
        this.element.on({
          'focusout.colorpicker': $.proxy(this.hide, this),
        });
      }
    }

    if (this.component !== false) {
      this.component.on({
        'click.colorpicker': $.proxy(this.show, this),
      });
    }

    if ((this.input === false) && (this.component === false)) {
      this.element.on({
        'click.colorpicker': $.proxy(this.show, this),
      });
    }
    this.update();

    $($.proxy(function () {
      this.element.trigger('create');
    }, this));
  };

  Colorpicker.version = '2.0.0-beta';

  Colorpicker.Color = Color;

  Colorpicker.prototype = {
    constructor: Colorpicker,
    destroy() {
      this.picker.remove();
      this.element.removeData('colorpicker').off('.colorpicker');
      if (this.input !== false) {
        this.input.off('.colorpicker');
      }
      if (this.component !== false) {
        this.component.off('.colorpicker');
      }
      this.element.removeClass('colorpicker-element');
      this.element.trigger({
        type: 'destroy',
      });
    },
    reposition() {
      if (this.options.inline !== false) {
        return false;
      }
      const offset = this.component ? this.component.offset() : this.element.offset();
      this.picker.css({
        top: offset.top + (this.component ? this.component.outerHeight() : this.element.outerHeight()),
        left: offset.left,
      });
    },
    show(e) {
      if (this.isDisabled()) {
        return false;
      }
      this.picker.addClass('colorpicker-visible').removeClass('colorpicker-hidden');
      this.reposition();
      $(window).on('resize.colorpicker', $.proxy(this.reposition, this));
      if (!this.hasInput() && e) {
        if (e.stopPropagation && e.preventDefault) {
          e.stopPropagation();
          e.preventDefault();
        }
      }
      if (this.options.inline === false) {
        $(window.document).on({
          'mousedown.colorpicker': $.proxy(this.hide, this),
        });
      }
      this.element.trigger({
        type: 'showPicker',
        color: this.color,
      });
    },
    hide() {
      this.picker.addClass('colorpicker-hidden').removeClass('colorpicker-visible');
      $(window).off('resize.colorpicker', this.reposition);
      $(document).off({
        'mousedown.colorpicker': this.hide,
      });
      this.update();
      this.element.trigger({
        type: 'hidePicker',
        color: this.color,
      });
    },
    updateData(val) {
      val = val ||  this.color.toString(this.format);
      this.element.data('color', val);
      return val;
    },
    updateInput(val) {
      val = val ||  this.color.toString(this.format);
      if (this.input !== false) {
        this.input.prop('value', val);
      }
      return val;
    },
    updatePicker(val) {
      if (val !== undefined) {
        this.color = new Color(val);
      }
      let sl = (this.options.horizontal === false) ? this.options.sliders : this.options.slidersHorz;
      const icns = this.picker.find('i');
      if (icns.length === 0) {
        return;
      }
      if (this.options.horizontal === false) {
        sl = this.options.sliders;
        icns.eq(1).css('top', sl.hue.maxTop * (1 - this.color.value.h)).end()
          .eq(2)
          .css('top', sl.alpha.maxTop * (1 - this.color.value.a));
      } else {
        sl = this.options.slidersHorz;
        icns.eq(1).css('left', sl.hue.maxLeft * (1 - this.color.value.h)).end()
          .eq(2)
          .css('left', sl.alpha.maxLeft * (1 - this.color.value.a));
      }
      icns.eq(0).css({
        top: sl.saturation.maxTop - this.color.value.b * sl.saturation.maxTop,
        left: this.color.value.s * sl.saturation.maxLeft,
      });
      this.picker.find('.colorpicker-saturation').css('backgroundColor', this.color.toHex(this.color.value.h, 1, 1, 1));
      this.picker.find('.colorpicker-alpha').css('backgroundColor', this.color.toHex());
      this.picker.find('.colorpicker-color, .colorpicker-color div').css('backgroundColor', this.color.toString(this.format));
      return val;
    },
    updateComponent(val) {
      val = val ||  this.color.toString(this.format);
      if (this.component !== false) {
        const icn = this.component.find('i').eq(0);
        if (icn.length > 0) {
          icn.css({
            backgroundColor: val,
          });
        } else {
          this.component.css({
            backgroundColor: val,
          });
        }
      }
      return val;
    },
    update(force) {
      const val = this.updateComponent();
      if ((this.getValue(false) !== false) || (force === true)) {
        // Update input/data only if the current value is not blank
        this.updateInput(val);
        this.updateData(val);
      }
      this.updatePicker();
      return val;
    },
    setValue(val) { // set color manually
      this.color = new Color(val);
      this.update();
      this.element.trigger({
        type: 'changeColor',
        color: this.color,
        value: val,
      });
    },
    getValue(defaultValue) {
      defaultValue = (defaultValue === undefined) ? '#000000' : defaultValue;
      let val;
      if (this.hasInput()) {
        val = this.input.val();
      } else {
        val = this.element.data('color');
      }
      if ((val === undefined) || (val === '') || (val === null)) {
        // if not defined or empty, return default
        val = defaultValue;
      }
      return val;
    },
    hasInput() {
      return (this.input !== false);
    },
    isDisabled() {
      if (this.hasInput()) {
        return (this.input.prop('disabled') === true);
      }
      return false;
    },
    disable() {
      if (this.hasInput()) {
        this.input.prop('disabled', true);
        return true;
      }
      return false;
    },
    enable() {
      if (this.hasInput()) {
        this.input.prop('disabled', false);
        return true;
      }
      return false;
    },
    currentSlider: null,
    mousePointer: {
      left: 0,
      top: 0,
    },
    mousedown(e) {
      e.stopPropagation();
      e.preventDefault();

      const target = $(e.target);

      // detect the slider and set the limits and callbacks
      const zone = target.closest('div');
      const sl = this.options.horizontal ? this.options.slidersHorz : this.options.sliders;
      if (!zone.is('.colorpicker')) {
        if (zone.is('.colorpicker-saturation')) {
          this.currentSlider = $.extend({}, sl.saturation);
        } else if (zone.is('.colorpicker-hue')) {
          this.currentSlider = $.extend({}, sl.hue);
        } else if (zone.is('.colorpicker-alpha')) {
          this.currentSlider = $.extend({}, sl.alpha);
        } else {
          return false;
        }
        const offset = zone.offset();
        // reference to guide's style
        this.currentSlider.guide = zone.find('i')[0].style;
        this.currentSlider.left = e.pageX - offset.left;
        this.currentSlider.top = e.pageY - offset.top;
        this.mousePointer = {
          left: e.pageX,
          top: e.pageY,
        };
        // trigger mousemove to move the guide to the current position
        $(document).on({
          'mousemove.colorpicker': $.proxy(this.mousemove, this),
          'mouseup.colorpicker': $.proxy(this.mouseup, this),
        }).trigger('mousemove');
      }
      return false;
    },
    mousemove(e) {
      e.stopPropagation();
      e.preventDefault();
      const left = Math.max(
        0,
        Math.min(
          this.currentSlider.maxLeft,
          this.currentSlider.left + ((e.pageX || this.mousePointer.left) - this.mousePointer.left),
        ),
      );
      const top = Math.max(
        0,
        Math.min(
          this.currentSlider.maxTop,
          this.currentSlider.top + ((e.pageY || this.mousePointer.top) - this.mousePointer.top),
        ),
      );
      this.currentSlider.guide.left = `${left}px`;
      this.currentSlider.guide.top = `${top}px`;
      if (this.currentSlider.callLeft) {
        this.color[this.currentSlider.callLeft].call(this.color, left / 100);
      }
      if (this.currentSlider.callTop) {
        this.color[this.currentSlider.callTop].call(this.color, top / 100);
      }
      this.update(true);

      this.element.trigger({
        type: 'changeColor',
        color: this.color,
      });
      return false;
    },
    mouseup(e) {
      e.stopPropagation();
      e.preventDefault();
      $(document).off({
        'mousemove.colorpicker': this.mousemove,
        'mouseup.colorpicker': this.mouseup,
      });
      return false;
    },
    keyup(e) {
      if ((e.keyCode === 38)) {
        if (this.color.value.a < 1) {
          this.color.value.a = Math.round((this.color.value.a + 0.01) * 100) / 100;
        }
        this.update(true);
      } else if ((e.keyCode === 40)) {
        if (this.color.value.a > 0) {
          this.color.value.a = Math.round((this.color.value.a - 0.01) * 100) / 100;
        }
        this.update(true);
      } else {
        var val = this.input.val();
        this.color = new Color(val);
        if (this.getValue(false) !== false) {
          this.updateData();
          this.updateComponent();
          this.updatePicker();
        }
      }
      this.element.trigger({
        type: 'changeColor',
        color: this.color,
        value: val,
      });
    },
  };

  $.colorpicker = Colorpicker;

  $.fn.colorpicker = function (option) {
    const pickerArgs = arguments;

    return this.each(function () {
      const $this = $(this);
      const inst = $this.data('colorpicker');
      const options = ((typeof option === 'object') ? option : {});
      if ((!inst) && (typeof option !== 'string')) {
        $this.data('colorpicker', new Colorpicker(this, options));
      } else if (typeof option === 'string') {
        inst[option].apply(inst, Array.prototype.slice.call(pickerArgs, 1));
      }
    });
  };

  $.fn.colorpicker.constructor = Colorpicker;
}(window.jQuery));