[10f099e] | 1 | /* Plugin for jQuery for working with colors. |
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| 2 | * |
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| 3 | * Version 1.1. |
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| 4 | * |
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| 5 | * Inspiration from jQuery color animation plugin by John Resig. |
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| 6 | * |
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| 7 | * Released under the MIT license by Ole Laursen, October 2009. |
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| 8 | * |
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| 9 | * Examples: |
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| 10 | * |
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| 11 | * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString() |
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| 12 | * var c = $.color.extract($("#mydiv"), 'background-color'); |
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| 13 | * console.log(c.r, c.g, c.b, c.a); |
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| 14 | * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)" |
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| 15 | * |
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| 16 | * Note that .scale() and .add() return the same modified object |
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| 17 | * instead of making a new one. |
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| 18 | * |
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| 19 | * V. 1.1: Fix error handling so e.g. parsing an empty string does |
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| 20 | * produce a color rather than just crashing. |
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| 21 | */ |
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| 22 | |
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| 23 | (function($) { |
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| 24 | $.color = {}; |
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| 25 | |
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| 26 | // construct color object with some convenient chainable helpers |
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| 27 | $.color.make = function (r, g, b, a) { |
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| 28 | var o = {}; |
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| 29 | o.r = r || 0; |
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| 30 | o.g = g || 0; |
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| 31 | o.b = b || 0; |
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| 32 | o.a = a != null ? a : 1; |
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| 33 | |
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| 34 | o.add = function (c, d) { |
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| 35 | for (var i = 0; i < c.length; ++i) |
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| 36 | o[c.charAt(i)] += d; |
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| 37 | return o.normalize(); |
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| 38 | }; |
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| 39 | |
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| 40 | o.scale = function (c, f) { |
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| 41 | for (var i = 0; i < c.length; ++i) |
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| 42 | o[c.charAt(i)] *= f; |
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| 43 | return o.normalize(); |
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| 44 | }; |
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| 45 | |
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| 46 | o.toString = function () { |
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| 47 | if (o.a >= 1.0) { |
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| 48 | return "rgb("+[o.r, o.g, o.b].join(",")+")"; |
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| 49 | } else { |
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| 50 | return "rgba("+[o.r, o.g, o.b, o.a].join(",")+")"; |
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| 51 | } |
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| 52 | }; |
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| 53 | |
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| 54 | o.normalize = function () { |
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| 55 | function clamp(min, value, max) { |
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| 56 | return value < min ? min: (value > max ? max: value); |
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| 57 | } |
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| 58 | |
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| 59 | o.r = clamp(0, parseInt(o.r), 255); |
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| 60 | o.g = clamp(0, parseInt(o.g), 255); |
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| 61 | o.b = clamp(0, parseInt(o.b), 255); |
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| 62 | o.a = clamp(0, o.a, 1); |
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| 63 | return o; |
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| 64 | }; |
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| 65 | |
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| 66 | o.clone = function () { |
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| 67 | return $.color.make(o.r, o.b, o.g, o.a); |
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| 68 | }; |
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| 69 | |
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| 70 | return o.normalize(); |
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| 71 | }; |
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| 72 | |
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| 73 | // extract CSS color property from element, going up in the DOM |
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| 74 | // if it's "transparent" |
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| 75 | $.color.extract = function (elem, css) { |
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| 76 | var c; |
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| 77 | |
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| 78 | do { |
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| 79 | c = elem.css(css).toLowerCase(); |
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| 80 | // keep going until we find an element that has color, or |
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| 81 | // we hit the body or root (have no parent) |
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| 82 | if (c != '' && c != 'transparent') |
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| 83 | break; |
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| 84 | elem = elem.parent(); |
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| 85 | } while (elem.length && !$.nodeName(elem.get(0), "body")); |
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| 86 | |
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| 87 | // catch Safari's way of signalling transparent |
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| 88 | if (c == "rgba(0, 0, 0, 0)") |
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| 89 | c = "transparent"; |
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| 90 | |
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| 91 | return $.color.parse(c); |
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| 92 | }; |
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| 93 | |
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| 94 | // parse CSS color string (like "rgb(10, 32, 43)" or "#fff"), |
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| 95 | // returns color object, if parsing failed, you get black (0, 0, |
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| 96 | // 0) out |
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| 97 | $.color.parse = function (str) { |
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| 98 | var res, m = $.color.make; |
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| 99 | |
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| 100 | // Look for rgb(num,num,num) |
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| 101 | if (res = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str)) |
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| 102 | return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10)); |
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| 103 | |
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| 104 | // Look for rgba(num,num,num,num) |
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| 105 | if (res = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str)) |
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| 106 | return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10), parseFloat(res[4])); |
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| 107 | |
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| 108 | // Look for rgb(num%,num%,num%) |
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| 109 | if (res = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str)) |
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| 110 | return m(parseFloat(res[1])*2.55, parseFloat(res[2])*2.55, parseFloat(res[3])*2.55); |
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| 111 | |
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| 112 | // Look for rgba(num%,num%,num%,num) |
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| 113 | if (res = /rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str)) |
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| 114 | return m(parseFloat(res[1])*2.55, parseFloat(res[2])*2.55, parseFloat(res[3])*2.55, parseFloat(res[4])); |
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| 115 | |
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| 116 | // Look for #a0b1c2 |
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| 117 | if (res = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str)) |
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| 118 | return m(parseInt(res[1], 16), parseInt(res[2], 16), parseInt(res[3], 16)); |
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| 119 | |
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| 120 | // Look for #fff |
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| 121 | if (res = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str)) |
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| 122 | return m(parseInt(res[1]+res[1], 16), parseInt(res[2]+res[2], 16), parseInt(res[3]+res[3], 16)); |
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| 123 | |
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| 124 | // Otherwise, we're most likely dealing with a named color |
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| 125 | var name = $.trim(str).toLowerCase(); |
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| 126 | if (name == "transparent") |
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| 127 | return m(255, 255, 255, 0); |
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| 128 | else { |
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| 129 | // default to black |
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| 130 | res = lookupColors[name] || [0, 0, 0]; |
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| 131 | return m(res[0], res[1], res[2]); |
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| 132 | } |
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| 133 | }; |
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| 134 | |
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| 135 | var lookupColors = { |
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| 136 | aqua:[0,255,255], |
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| 137 | azure:[240,255,255], |
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| 138 | beige:[245,245,220], |
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| 139 | black:[0,0,0], |
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| 140 | blue:[0,0,255], |
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| 141 | brown:[165,42,42], |
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| 142 | cyan:[0,255,255], |
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| 143 | darkblue:[0,0,139], |
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| 144 | darkcyan:[0,139,139], |
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| 145 | darkgrey:[169,169,169], |
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| 146 | darkgreen:[0,100,0], |
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| 147 | darkkhaki:[189,183,107], |
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| 148 | darkmagenta:[139,0,139], |
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| 149 | darkolivegreen:[85,107,47], |
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| 150 | darkorange:[255,140,0], |
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| 151 | darkorchid:[153,50,204], |
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| 152 | darkred:[139,0,0], |
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| 153 | darksalmon:[233,150,122], |
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| 154 | darkviolet:[148,0,211], |
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| 155 | fuchsia:[255,0,255], |
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| 156 | gold:[255,215,0], |
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| 157 | green:[0,128,0], |
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| 158 | indigo:[75,0,130], |
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| 159 | khaki:[240,230,140], |
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| 160 | lightblue:[173,216,230], |
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| 161 | lightcyan:[224,255,255], |
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| 162 | lightgreen:[144,238,144], |
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| 163 | lightgrey:[211,211,211], |
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| 164 | lightpink:[255,182,193], |
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| 165 | lightyellow:[255,255,224], |
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| 166 | lime:[0,255,0], |
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| 167 | magenta:[255,0,255], |
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| 168 | maroon:[128,0,0], |
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| 169 | navy:[0,0,128], |
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| 170 | olive:[128,128,0], |
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| 171 | orange:[255,165,0], |
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| 172 | pink:[255,192,203], |
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| 173 | purple:[128,0,128], |
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| 174 | violet:[128,0,128], |
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| 175 | red:[255,0,0], |
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| 176 | silver:[192,192,192], |
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| 177 | white:[255,255,255], |
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| 178 | yellow:[255,255,0] |
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| 179 | }; |
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| 180 | })(jQuery); |
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