| 1 | /**
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| 2 | * A class to parse color values
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| 3 | * @author Stoyan Stefanov <[email protected]>
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| 4 | * @link http://www.phpied.com/rgb-color-parser-in-javascript/
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| 5 | * @license Use it if you like it
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| 6 | */
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| 7 | function RGBColor(color_string)
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| 8 | {
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| 9 | this.ok = false;
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| 10 |
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| 11 | // strip any leading #
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| 12 | if (color_string.charAt(0) == '#') { // remove # if any
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| 13 | color_string = color_string.substr(1,6);
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| 14 | }
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| 15 |
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| 16 | color_string = color_string.replace(/ /g,'');
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| 17 | color_string = color_string.toLowerCase();
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| 18 |
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| 19 | // before getting into regexps, try simple matches
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| 20 | // and overwrite the input
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| 21 | var simple_colors = {
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| 22 | aliceblue: 'f0f8ff',
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| 23 | antiquewhite: 'faebd7',
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| 24 | aqua: '00ffff',
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| 25 | aquamarine: '7fffd4',
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| 26 | azure: 'f0ffff',
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| 27 | beige: 'f5f5dc',
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| 28 | bisque: 'ffe4c4',
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| 29 | black: '000000',
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| 30 | blanchedalmond: 'ffebcd',
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| 31 | blue: '0000ff',
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| 32 | blueviolet: '8a2be2',
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| 33 | brown: 'a52a2a',
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| 34 | burlywood: 'deb887',
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| 35 | cadetblue: '5f9ea0',
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| 36 | chartreuse: '7fff00',
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| 37 | chocolate: 'd2691e',
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| 38 | coral: 'ff7f50',
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| 39 | cornflowerblue: '6495ed',
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| 40 | cornsilk: 'fff8dc',
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| 41 | crimson: 'dc143c',
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| 42 | cyan: '00ffff',
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| 43 | darkblue: '00008b',
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| 44 | darkcyan: '008b8b',
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| 45 | darkgoldenrod: 'b8860b',
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| 46 | darkgray: 'a9a9a9',
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| 47 | darkgreen: '006400',
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| 48 | darkkhaki: 'bdb76b',
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| 49 | darkmagenta: '8b008b',
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| 50 | darkolivegreen: '556b2f',
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| 51 | darkorange: 'ff8c00',
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| 52 | darkorchid: '9932cc',
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| 53 | darkred: '8b0000',
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| 54 | darksalmon: 'e9967a',
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| 55 | darkseagreen: '8fbc8f',
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| 56 | darkslateblue: '483d8b',
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| 57 | darkslategray: '2f4f4f',
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| 58 | darkturquoise: '00ced1',
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| 59 | darkviolet: '9400d3',
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| 60 | deeppink: 'ff1493',
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| 61 | deepskyblue: '00bfff',
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| 62 | dimgray: '696969',
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| 63 | dodgerblue: '1e90ff',
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| 64 | feldspar: 'd19275',
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| 65 | firebrick: 'b22222',
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| 66 | floralwhite: 'fffaf0',
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| 67 | forestgreen: '228b22',
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| 68 | fuchsia: 'ff00ff',
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| 69 | gainsboro: 'dcdcdc',
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| 70 | ghostwhite: 'f8f8ff',
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| 71 | gold: 'ffd700',
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| 72 | goldenrod: 'daa520',
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| 73 | gray: '808080',
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| 74 | green: '008000',
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| 75 | greenyellow: 'adff2f',
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| 76 | honeydew: 'f0fff0',
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| 77 | hotpink: 'ff69b4',
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| 78 | indianred : 'cd5c5c',
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| 79 | indigo : '4b0082',
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| 80 | ivory: 'fffff0',
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| 81 | khaki: 'f0e68c',
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| 82 | lavender: 'e6e6fa',
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| 83 | lavenderblush: 'fff0f5',
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| 84 | lawngreen: '7cfc00',
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| 85 | lemonchiffon: 'fffacd',
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| 86 | lightblue: 'add8e6',
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| 87 | lightcoral: 'f08080',
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| 88 | lightcyan: 'e0ffff',
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| 89 | lightgoldenrodyellow: 'fafad2',
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| 90 | lightgrey: 'd3d3d3',
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| 91 | lightgreen: '90ee90',
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| 92 | lightpink: 'ffb6c1',
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| 93 | lightsalmon: 'ffa07a',
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| 94 | lightseagreen: '20b2aa',
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| 95 | lightskyblue: '87cefa',
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| 96 | lightslateblue: '8470ff',
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| 97 | lightslategray: '778899',
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| 98 | lightsteelblue: 'b0c4de',
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| 99 | lightyellow: 'ffffe0',
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| 100 | lime: '00ff00',
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| 101 | limegreen: '32cd32',
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| 102 | linen: 'faf0e6',
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| 103 | magenta: 'ff00ff',
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| 104 | maroon: '800000',
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| 105 | mediumaquamarine: '66cdaa',
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| 106 | mediumblue: '0000cd',
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| 107 | mediumorchid: 'ba55d3',
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| 108 | mediumpurple: '9370d8',
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| 109 | mediumseagreen: '3cb371',
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| 110 | mediumslateblue: '7b68ee',
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| 111 | mediumspringgreen: '00fa9a',
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| 112 | mediumturquoise: '48d1cc',
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| 113 | mediumvioletred: 'c71585',
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| 114 | midnightblue: '191970',
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| 115 | mintcream: 'f5fffa',
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| 116 | mistyrose: 'ffe4e1',
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| 117 | moccasin: 'ffe4b5',
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| 118 | navajowhite: 'ffdead',
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| 119 | navy: '000080',
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| 120 | oldlace: 'fdf5e6',
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| 121 | olive: '808000',
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| 122 | olivedrab: '6b8e23',
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| 123 | orange: 'ffa500',
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| 124 | orangered: 'ff4500',
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| 125 | orchid: 'da70d6',
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| 126 | palegoldenrod: 'eee8aa',
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| 127 | palegreen: '98fb98',
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| 128 | paleturquoise: 'afeeee',
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| 129 | palevioletred: 'd87093',
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| 130 | papayawhip: 'ffefd5',
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| 131 | peachpuff: 'ffdab9',
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| 132 | peru: 'cd853f',
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| 133 | pink: 'ffc0cb',
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| 134 | plum: 'dda0dd',
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| 135 | powderblue: 'b0e0e6',
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| 136 | purple: '800080',
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| 137 | red: 'ff0000',
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| 138 | rosybrown: 'bc8f8f',
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| 139 | royalblue: '4169e1',
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| 140 | saddlebrown: '8b4513',
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| 141 | salmon: 'fa8072',
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| 142 | sandybrown: 'f4a460',
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| 143 | seagreen: '2e8b57',
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| 144 | seashell: 'fff5ee',
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| 145 | sienna: 'a0522d',
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| 146 | silver: 'c0c0c0',
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| 147 | skyblue: '87ceeb',
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| 148 | slateblue: '6a5acd',
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| 149 | slategray: '708090',
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| 150 | snow: 'fffafa',
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| 151 | springgreen: '00ff7f',
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| 152 | steelblue: '4682b4',
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| 153 | tan: 'd2b48c',
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| 154 | teal: '008080',
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| 155 | thistle: 'd8bfd8',
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| 156 | tomato: 'ff6347',
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| 157 | turquoise: '40e0d0',
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| 158 | violet: 'ee82ee',
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| 159 | violetred: 'd02090',
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| 160 | wheat: 'f5deb3',
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| 161 | white: 'ffffff',
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| 162 | whitesmoke: 'f5f5f5',
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| 163 | yellow: 'ffff00',
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| 164 | yellowgreen: '9acd32'
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| 165 | };
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| 166 | for (var key in simple_colors) {
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| 167 | if (color_string == key) {
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| 168 | color_string = simple_colors[key];
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| 169 | }
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| 170 | }
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| 171 | // emd of simple type-in colors
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| 172 |
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| 173 | // array of color definition objects
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| 174 | var color_defs = [
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| 175 | {
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| 176 | re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
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| 177 | example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
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| 178 | process: function (bits){
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| 179 | return [
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| 180 | parseInt(bits[1]),
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| 181 | parseInt(bits[2]),
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| 182 | parseInt(bits[3])
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| 183 | ];
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| 184 | }
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| 185 | },
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| 186 | {
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| 187 | re: /^(\w{2})(\w{2})(\w{2})$/,
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| 188 | example: ['#00ff00', '336699'],
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| 189 | process: function (bits){
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| 190 | return [
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| 191 | parseInt(bits[1], 16),
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| 192 | parseInt(bits[2], 16),
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| 193 | parseInt(bits[3], 16)
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| 194 | ];
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| 195 | }
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| 196 | },
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| 197 | {
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| 198 | re: /^(\w{1})(\w{1})(\w{1})$/,
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| 199 | example: ['#fb0', 'f0f'],
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| 200 | process: function (bits){
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| 201 | return [
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| 202 | parseInt(bits[1] + bits[1], 16),
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| 203 | parseInt(bits[2] + bits[2], 16),
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| 204 | parseInt(bits[3] + bits[3], 16)
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| 205 | ];
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| 206 | }
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| 207 | }
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| 208 | ];
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| 209 |
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| 210 | // search through the definitions to find a match
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| 211 | for (var i = 0; i < color_defs.length; i++) {
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| 212 | var re = color_defs[i].re;
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| 213 | var processor = color_defs[i].process;
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| 214 | var bits = re.exec(color_string);
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| 215 | if (bits) {
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| 216 | channels = processor(bits);
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| 217 | this.r = channels[0];
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| 218 | this.g = channels[1];
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| 219 | this.b = channels[2];
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| 220 | this.ok = true;
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| 221 | }
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| 222 |
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| 223 | }
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| 224 |
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| 225 | // validate/cleanup values
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| 226 | this.r = (this.r < 0 || isNaN(this.r)) ? 0 : ((this.r > 255) ? 255 : this.r);
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| 227 | this.g = (this.g < 0 || isNaN(this.g)) ? 0 : ((this.g > 255) ? 255 : this.g);
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| 228 | this.b = (this.b < 0 || isNaN(this.b)) ? 0 : ((this.b > 255) ? 255 : this.b);
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| 229 |
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| 230 | // some getters
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| 231 | this.toRGB = function () {
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| 232 | return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
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| 233 | }
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| 234 | this.toHex = function () {
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| 235 | var r = this.r.toString(16);
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| 236 | var g = this.g.toString(16);
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| 237 | var b = this.b.toString(16);
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| 238 | if (r.length == 1) r = '0' + r;
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| 239 | if (g.length == 1) g = '0' + g;
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| 240 | if (b.length == 1) b = '0' + b;
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| 241 | return '#' + r + g + b;
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| 242 | }
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| 243 |
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| 244 | // help
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| 245 | this.getHelpXML = function () {
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| 246 |
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| 247 | var examples = new Array();
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| 248 | // add regexps
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| 249 | for (var i = 0; i < color_defs.length; i++) {
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| 250 | var example = color_defs[i].example;
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| 251 | for (var j = 0; j < example.length; j++) {
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| 252 | examples[examples.length] = example[j];
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| 253 | }
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| 254 | }
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| 255 | // add type-in colors
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| 256 | for (var sc in simple_colors) {
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| 257 | examples[examples.length] = sc;
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| 258 | }
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| 259 |
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| 260 | var xml = document.createElement('ul');
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| 261 | xml.setAttribute('id', 'rgbcolor-examples');
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| 262 | for (var i = 0; i < examples.length; i++) {
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| 263 | try {
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| 264 | var list_item = document.createElement('li');
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| 265 | var list_color = new RGBColor(examples[i]);
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| 266 | var example_div = document.createElement('div');
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| 267 | example_div.style.cssText =
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| 268 | 'margin: 3px; '
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| 269 | + 'border: 1px solid black; '
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| 270 | + 'background:' + list_color.toHex() + '; '
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| 271 | + 'color:' + list_color.toHex()
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| 272 | ;
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| 273 | example_div.appendChild(document.createTextNode('test'));
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| 274 | var list_item_value = document.createTextNode(
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| 275 | ' ' + examples[i] + ' -> ' + list_color.toRGB() + ' -> ' + list_color.toHex()
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| 276 | );
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| 277 | list_item.appendChild(example_div);
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| 278 | list_item.appendChild(list_item_value);
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| 279 | xml.appendChild(list_item);
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| 280 |
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| 281 | } catch(e){}
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| 282 | }
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| 283 | return xml;
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| 284 |
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| 285 | }
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| 286 |
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| 287 | }
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