# libs/rgbcolor.js

    /**
     * A class to parse color values
     * @author Stoyan Stefanov <sstoo@gmail.com>
     * {@link   http://www.phpied.com/rgb-color-parser-in-javascript/}
     * @license Use it if you like it
     */

    function RGBColor(color_string) {
      color_string = color_string || "";
      this.ok = false;

      // strip any leading #
      if (color_string.charAt(0) == "#") {
        // remove # if any
        color_string = color_string.substr(1, 6);
      }

      color_string = color_string.replace(/ /g, "");
      color_string = color_string.toLowerCase();

      var channels;

      // before getting into regexps, try simple matches
      // and overwrite the input
      var simple_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",
        feldspar: "d19275",
        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",
        lightslateblue: "8470ff",
        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",
        violetred: "d02090",
        wheat: "f5deb3",
        white: "ffffff",
        whitesmoke: "f5f5f5",
        yellow: "ffff00",
        yellowgreen: "9acd32"
      };
      color_string = simple_colors[color_string] || color_string;

      // array of color definition objects
      var color_defs = [
        {
          re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
          example: ["rgb(123, 234, 45)", "rgb(255,234,245)"],
          process: function(bits) {
            return [parseInt(bits[1]), parseInt(bits[2]), parseInt(bits[3])];
          }
        },
        {
          re: /^(\w{2})(\w{2})(\w{2})$/,
          example: ["#00ff00", "336699"],
          process: function(bits) {
            return [
              parseInt(bits[1], 16),
              parseInt(bits[2], 16),
              parseInt(bits[3], 16)
            ];
          }
        },
        {
          re: /^(\w{1})(\w{1})(\w{1})$/,
          example: ["#fb0", "f0f"],
          process: function(bits) {
            return [
              parseInt(bits[1] + bits[1], 16),
              parseInt(bits[2] + bits[2], 16),
              parseInt(bits[3] + bits[3], 16)
            ];
          }
        }
      ];

      // search through the definitions to find a match
      for (var i = 0; i < color_defs.length; i++) {
        var re = color_defs[i].re;
        var processor = color_defs[i].process;
        var bits = re.exec(color_string);
        if (bits) {
          channels = processor(bits);
          this.r = channels[0];
          this.g = channels[1];
          this.b = channels[2];
          this.ok = true;
        }
      }

      // validate/cleanup values
      this.r = this.r < 0 || isNaN(this.r) ? 0 : this.r > 255 ? 255 : this.r;
      this.g = this.g < 0 || isNaN(this.g) ? 0 : this.g > 255 ? 255 : this.g;
      this.b = this.b < 0 || isNaN(this.b) ? 0 : this.b > 255 ? 255 : this.b;

      // some getters
      this.toRGB = function() {
        return "rgb(" + this.r + ", " + this.g + ", " + this.b + ")";
      };
      this.toHex = function() {
        var r = this.r.toString(16);
        var g = this.g.toString(16);
        var b = this.b.toString(16);
        if (r.length == 1) r = "0" + r;
        if (g.length == 1) g = "0" + g;
        if (b.length == 1) b = "0" + b;
        return "#" + r + g + b;
      };
    }

    export { RGBColor };