288 lines
8.5 KiB
JavaScript
288 lines
8.5 KiB
JavaScript
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/**
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* A class to parse color values
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* @author Stoyan Stefanov <sstoo@gmail.com>
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* @link http://www.phpied.com/rgb-color-parser-in-javascript/
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* @license Use it if you like it
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*/
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function RGBColor(color_string)
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{
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this.ok = false;
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// strip any leading #
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if (color_string.charAt(0) == '#') { // remove # if any
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color_string = color_string.substr(1,6);
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}
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color_string = color_string.replace(/ /g,'');
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color_string = color_string.toLowerCase();
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// before getting into regexps, try simple matches
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// and overwrite the input
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var simple_colors = {
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aliceblue: 'f0f8ff',
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antiquewhite: 'faebd7',
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aqua: '00ffff',
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aquamarine: '7fffd4',
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azure: 'f0ffff',
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beige: 'f5f5dc',
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bisque: 'ffe4c4',
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black: '000000',
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blanchedalmond: 'ffebcd',
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blue: '0000ff',
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blueviolet: '8a2be2',
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brown: 'a52a2a',
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burlywood: 'deb887',
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cadetblue: '5f9ea0',
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chartreuse: '7fff00',
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chocolate: 'd2691e',
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coral: 'ff7f50',
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cornflowerblue: '6495ed',
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cornsilk: 'fff8dc',
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crimson: 'dc143c',
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cyan: '00ffff',
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darkblue: '00008b',
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darkcyan: '008b8b',
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darkgoldenrod: 'b8860b',
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darkgray: 'a9a9a9',
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darkgreen: '006400',
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darkkhaki: 'bdb76b',
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darkmagenta: '8b008b',
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darkolivegreen: '556b2f',
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darkorange: 'ff8c00',
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darkorchid: '9932cc',
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darkred: '8b0000',
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darksalmon: 'e9967a',
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darkseagreen: '8fbc8f',
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darkslateblue: '483d8b',
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darkslategray: '2f4f4f',
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darkturquoise: '00ced1',
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darkviolet: '9400d3',
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deeppink: 'ff1493',
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deepskyblue: '00bfff',
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dimgray: '696969',
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dodgerblue: '1e90ff',
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feldspar: 'd19275',
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firebrick: 'b22222',
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floralwhite: 'fffaf0',
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forestgreen: '228b22',
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fuchsia: 'ff00ff',
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gainsboro: 'dcdcdc',
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ghostwhite: 'f8f8ff',
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gold: 'ffd700',
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goldenrod: 'daa520',
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gray: '808080',
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green: '008000',
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greenyellow: 'adff2f',
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honeydew: 'f0fff0',
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hotpink: 'ff69b4',
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indianred : 'cd5c5c',
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indigo : '4b0082',
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ivory: 'fffff0',
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khaki: 'f0e68c',
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lavender: 'e6e6fa',
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lavenderblush: 'fff0f5',
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lawngreen: '7cfc00',
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lemonchiffon: 'fffacd',
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lightblue: 'add8e6',
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lightcoral: 'f08080',
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lightcyan: 'e0ffff',
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lightgoldenrodyellow: 'fafad2',
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lightgrey: 'd3d3d3',
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lightgreen: '90ee90',
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lightpink: 'ffb6c1',
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lightsalmon: 'ffa07a',
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lightseagreen: '20b2aa',
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lightskyblue: '87cefa',
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lightslateblue: '8470ff',
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lightslategray: '778899',
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lightsteelblue: 'b0c4de',
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lightyellow: 'ffffe0',
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lime: '00ff00',
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limegreen: '32cd32',
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linen: 'faf0e6',
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magenta: 'ff00ff',
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maroon: '800000',
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mediumaquamarine: '66cdaa',
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mediumblue: '0000cd',
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mediumorchid: 'ba55d3',
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mediumpurple: '9370d8',
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mediumseagreen: '3cb371',
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mediumslateblue: '7b68ee',
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mediumspringgreen: '00fa9a',
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mediumturquoise: '48d1cc',
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mediumvioletred: 'c71585',
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midnightblue: '191970',
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mintcream: 'f5fffa',
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mistyrose: 'ffe4e1',
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moccasin: 'ffe4b5',
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navajowhite: 'ffdead',
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navy: '000080',
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oldlace: 'fdf5e6',
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olive: '808000',
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olivedrab: '6b8e23',
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orange: 'ffa500',
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orangered: 'ff4500',
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orchid: 'da70d6',
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palegoldenrod: 'eee8aa',
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palegreen: '98fb98',
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paleturquoise: 'afeeee',
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palevioletred: 'd87093',
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papayawhip: 'ffefd5',
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peachpuff: 'ffdab9',
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peru: 'cd853f',
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pink: 'ffc0cb',
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plum: 'dda0dd',
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powderblue: 'b0e0e6',
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purple: '800080',
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red: 'ff0000',
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rosybrown: 'bc8f8f',
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royalblue: '4169e1',
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saddlebrown: '8b4513',
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salmon: 'fa8072',
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sandybrown: 'f4a460',
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seagreen: '2e8b57',
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seashell: 'fff5ee',
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sienna: 'a0522d',
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silver: 'c0c0c0',
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skyblue: '87ceeb',
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slateblue: '6a5acd',
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slategray: '708090',
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snow: 'fffafa',
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springgreen: '00ff7f',
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steelblue: '4682b4',
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tan: 'd2b48c',
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teal: '008080',
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thistle: 'd8bfd8',
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tomato: 'ff6347',
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turquoise: '40e0d0',
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violet: 'ee82ee',
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violetred: 'd02090',
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wheat: 'f5deb3',
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white: 'ffffff',
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whitesmoke: 'f5f5f5',
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yellow: 'ffff00',
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yellowgreen: '9acd32'
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};
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for (var key in simple_colors) {
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if (color_string == key) {
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color_string = simple_colors[key];
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}
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}
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// emd of simple type-in colors
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// array of color definition objects
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var color_defs = [
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{
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re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
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example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
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process: function (bits){
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return [
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parseInt(bits[1]),
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parseInt(bits[2]),
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parseInt(bits[3])
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];
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}
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},
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{
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re: /^(\w{2})(\w{2})(\w{2})$/,
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example: ['#00ff00', '336699'],
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process: function (bits){
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return [
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parseInt(bits[1], 16),
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parseInt(bits[2], 16),
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parseInt(bits[3], 16)
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];
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}
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},
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{
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re: /^(\w{1})(\w{1})(\w{1})$/,
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example: ['#fb0', 'f0f'],
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process: function (bits){
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return [
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parseInt(bits[1] + bits[1], 16),
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parseInt(bits[2] + bits[2], 16),
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parseInt(bits[3] + bits[3], 16)
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];
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}
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}
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];
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// search through the definitions to find a match
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for (var i = 0; i < color_defs.length; i++) {
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var re = color_defs[i].re;
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var processor = color_defs[i].process;
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var bits = re.exec(color_string);
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if (bits) {
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channels = processor(bits);
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this.r = channels[0];
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this.g = channels[1];
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this.b = channels[2];
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this.ok = true;
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}
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}
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// validate/cleanup values
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this.r = (this.r < 0 || isNaN(this.r)) ? 0 : ((this.r > 255) ? 255 : this.r);
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this.g = (this.g < 0 || isNaN(this.g)) ? 0 : ((this.g > 255) ? 255 : this.g);
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this.b = (this.b < 0 || isNaN(this.b)) ? 0 : ((this.b > 255) ? 255 : this.b);
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// some getters
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this.toRGB = function () {
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return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
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}
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this.toHex = function () {
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var r = this.r.toString(16);
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var g = this.g.toString(16);
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var b = this.b.toString(16);
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if (r.length == 1) r = '0' + r;
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if (g.length == 1) g = '0' + g;
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if (b.length == 1) b = '0' + b;
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return '#' + r + g + b;
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}
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// help
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this.getHelpXML = function () {
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var examples = new Array();
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// add regexps
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for (var i = 0; i < color_defs.length; i++) {
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var example = color_defs[i].example;
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for (var j = 0; j < example.length; j++) {
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examples[examples.length] = example[j];
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}
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}
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// add type-in colors
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for (var sc in simple_colors) {
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examples[examples.length] = sc;
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}
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var xml = document.createElement('ul');
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xml.setAttribute('id', 'rgbcolor-examples');
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for (var i = 0; i < examples.length; i++) {
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try {
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var list_item = document.createElement('li');
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var list_color = new RGBColor(examples[i]);
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var example_div = document.createElement('div');
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example_div.style.cssText =
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'margin: 3px; '
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+ 'border: 1px solid black; '
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+ 'background:' + list_color.toHex() + '; '
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+ 'color:' + list_color.toHex()
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;
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example_div.appendChild(document.createTextNode('test'));
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var list_item_value = document.createTextNode(
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' ' + examples[i] + ' -> ' + list_color.toRGB() + ' -> ' + list_color.toHex()
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);
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list_item.appendChild(example_div);
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list_item.appendChild(list_item_value);
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xml.appendChild(list_item);
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} catch(e){}
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}
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return xml;
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}
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}
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