| /* Plugin for jQuery for working with colors. | |
| * | |
| * Version 1.0. | |
| * | |
| * Inspiration from jQuery color animation plugin by John Resig. | |
| * | |
| * Released under the MIT license by Ole Laursen, October 2009. | |
| * | |
| * Examples: | |
| * | |
| * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString() | |
| * var c = $.color.extract($("#mydiv"), 'background-color'); | |
| * console.log(c.r, c.g, c.b, c.a); | |
| * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)" | |
| * | |
| * Note that .scale() and .add() work in-place instead of returning | |
| * new objects. | |
| */ | |
| (function() { | |
| jQuery.color = {}; | |
| // construct color object with some convenient chainable helpers | |
| jQuery.color.make = function (r, g, b, a) { | |
| var o = {}; | |
| o.r = r || 0; | |
| o.g = g || 0; | |
| o.b = b || 0; | |
| o.a = a != null ? a : 1; | |
| o.add = function (c, d) { | |
| for (var i = 0; i < c.length; ++i) | |
| o[c.charAt(i)] += d; | |
| return o.normalize(); | |
| }; | |
| o.scale = function (c, f) { | |
| for (var i = 0; i < c.length; ++i) | |
| o[c.charAt(i)] *= f; | |
| return o.normalize(); | |
| }; | |
| o.toString = function () { | |
| if (o.a >= 1.0) { | |
| return "rgb("+[o.r, o.g, o.b].join(",")+")"; | |
| } else { | |
| return "rgba("+[o.r, o.g, o.b, o.a].join(",")+")"; | |
| } | |
| }; | |
| o.normalize = function () { | |
| function clamp(min, value, max) { | |
| return value < min ? min: (value > max ? max: value); | |
| } | |
| o.r = clamp(0, parseInt(o.r), 255); | |
| o.g = clamp(0, parseInt(o.g), 255); | |
| o.b = clamp(0, parseInt(o.b), 255); | |
| o.a = clamp(0, o.a, 1); | |
| return o; | |
| }; | |
| o.clone = function () { | |
| return jQuery.color.make(o.r, o.b, o.g, o.a); | |
| }; | |
| return o.normalize(); | |
| } | |
| // extract CSS color property from element, going up in the DOM | |
| // if it's "transparent" | |
| jQuery.color.extract = function (elem, css) { | |
| var c; | |
| do { | |
| c = elem.css(css).toLowerCase(); | |
| // keep going until we find an element that has color, or | |
| // we hit the body | |
| if (c != '' && c != 'transparent') | |
| break; | |
| elem = elem.parent(); | |
| } while (!jQuery.nodeName(elem.get(0), "body")); | |
| // catch Safari's way of signalling transparent | |
| if (c == "rgba(0, 0, 0, 0)") | |
| c = "transparent"; | |
| return jQuery.color.parse(c); | |
| } | |
| // parse CSS color string (like "rgb(10, 32, 43)" or "#fff"), | |
| // returns color object | |
| jQuery.color.parse = function (str) { | |
| var res, m = jQuery.color.make; | |
| // Look for rgb(num,num,num) | |
| if (res = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str)) | |
| return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10)); | |
| // Look for rgba(num,num,num,num) | |
| 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)) | |
| return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10), parseFloat(res[4])); | |
| // Look for rgb(num%,num%,num%) | |
| if (res = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str)) | |
| return m(parseFloat(res[1])*2.55, parseFloat(res[2])*2.55, parseFloat(res[3])*2.55); | |
| // Look for rgba(num%,num%,num%,num) | |
| 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)) | |
| return m(parseFloat(res[1])*2.55, parseFloat(res[2])*2.55, parseFloat(res[3])*2.55, parseFloat(res[4])); | |
| // Look for #a0b1c2 | |
| if (res = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str)) | |
| return m(parseInt(res[1], 16), parseInt(res[2], 16), parseInt(res[3], 16)); | |
| // Look for #fff | |
| if (res = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str)) | |
| return m(parseInt(res[1]+res[1], 16), parseInt(res[2]+res[2], 16), parseInt(res[3]+res[3], 16)); | |
| // Otherwise, we're most likely dealing with a named color | |
| var name = jQuery.trim(str).toLowerCase(); | |
| if (name == "transparent") | |
| return m(255, 255, 255, 0); | |
| else { | |
| res = lookupColors[name]; | |
| return m(res[0], res[1], res[2]); | |
| } | |
| } | |
| var lookupColors = { | |
| aqua:[0,255,255], | |
| azure:[240,255,255], | |
| beige:[245,245,220], | |
| black:[0,0,0], | |
| blue:[0,0,255], | |
| brown:[165,42,42], | |
| cyan:[0,255,255], | |
| darkblue:[0,0,139], | |
| darkcyan:[0,139,139], | |
| darkgrey:[169,169,169], | |
| darkgreen:[0,100,0], | |
| darkkhaki:[189,183,107], | |
| darkmagenta:[139,0,139], | |
| darkolivegreen:[85,107,47], | |
| darkorange:[255,140,0], | |
| darkorchid:[153,50,204], | |
| darkred:[139,0,0], | |
| darksalmon:[233,150,122], | |
| darkviolet:[148,0,211], | |
| fuchsia:[255,0,255], | |
| gold:[255,215,0], | |
| green:[0,128,0], | |
| indigo:[75,0,130], | |
| khaki:[240,230,140], | |
| lightblue:[173,216,230], | |
| lightcyan:[224,255,255], | |
| lightgreen:[144,238,144], | |
| lightgrey:[211,211,211], | |
| lightpink:[255,182,193], | |
| lightyellow:[255,255,224], | |
| lime:[0,255,0], | |
| magenta:[255,0,255], | |
| maroon:[128,0,0], | |
| navy:[0,0,128], | |
| olive:[128,128,0], | |
| orange:[255,165,0], | |
| pink:[255,192,203], | |
| purple:[128,0,128], | |
| violet:[128,0,128], | |
| red:[255,0,0], | |
| silver:[192,192,192], | |
| white:[255,255,255], | |
| yellow:[255,255,0] | |
| }; | |
| })(); | |