1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | /** * Flotr Color */ (function () { var _ = Flotr._; // Constructor function Color (r, g, b, a) { this.rgba = ['r','g','b','a']; var x = 4; while(-1<--x){ this[this.rgba[x]] = arguments[x] || ((x==3) ? 1.0 : 0); } this.normalize(); } // Constants var COLOR_NAMES = { 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] }; Color.prototype = { scale: function(rf, gf, bf, af){ var x = 4; while (-1 < --x) { if (!_.isUndefined(arguments[x])) this[this.rgba[x]] *= arguments[x]; } return this.normalize(); }, alpha: function(alpha) { if (!_.isUndefined(alpha) && !_.isNull(alpha)) { this.a = alpha; } return this.normalize(); }, clone: function(){ return new Color(this.r, this.b, this.g, this.a); }, limit: function(val,minVal,maxVal){ return Math.max(Math.min(val, maxVal), minVal); }, normalize: function(){ var limit = this.limit; this.r = limit(parseInt(this.r, 10), 0, 255); this.g = limit(parseInt(this.g, 10), 0, 255); this.b = limit(parseInt(this.b, 10), 0, 255); this.a = limit(this.a, 0, 1); return this; }, distance: function(color){ if (!color) return; color = new Color.parse(color); var dist = 0, x = 3; while(-1<--x){ dist += Math.abs(this[this.rgba[x]] - color[this.rgba[x]]); } return dist; }, toString: function(){ return (this.a >= 1.0) ? 'rgb('+[this.r,this.g,this.b].join(',')+')' : 'rgba('+[this.r,this.g,this.b,this.a].join(',')+')'; }, contrast: function () { var test = 1 - ( 0.299 * this.r + 0.587 * this.g + 0.114 * this.b) / 255; return (test < 0.5 ? '#000000' : '#ffffff'); } }; _.extend(Color, { /** * Parses a color string and returns a corresponding Color. * The different tests are in order of probability to improve speed. * @param {String, Color} str - string thats representing a color * @return {Color} returns a Color object or false */ parse: function(color){ if (color instanceof Color) return color; var result; // #a0b1c2 if((result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))) return new Color(parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)); // rgb(num,num,num) if((result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color))) return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10)); // #fff if((result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))) return new Color(parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)); // rgba(num,num,num,num) if((result = /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(color))) return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10), parseFloat(result[4])); // rgb(num%,num%,num%) if((result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(color))) return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55); // rgba(num%,num%,num%,num) if((result = /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(color))) return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4])); // Otherwise, we're most likely dealing with a named color. var name = (color+'').replace(/^\s*([\S\s]*?)\s*$/, '$1').toLowerCase(); if(name == 'transparent'){ return new Color(255, 255, 255, 0); } return (result = COLOR_NAMES[name]) ? new Color(result[0], result[1], result[2]) : new Color(0, 0, 0, 0); }, /** * Process color and options into color style. */ processColor: function(color, options) { var opacity = options.opacity; if (!color) return 'rgba(0, 0, 0, 0)'; if (color instanceof Color) return color.alpha(opacity).toString(); if (_.isString(color)) return Color.parse(color).alpha(opacity).toString(); var grad = color.colors ? color : {colors: color}; if (!options.ctx) { if (!_.isArray(grad.colors)) return 'rgba(0, 0, 0, 0)'; return Color.parse(_.isArray(grad.colors[0]) ? grad.colors[0][1] : grad.colors[0]).alpha(opacity).toString(); } grad = _.extend({start: 'top', end: 'bottom'}, grad); if (/top/i.test(grad.start)) options.x1 = 0; if (/left/i.test(grad.start)) options.y1 = 0; if (/bottom/i.test(grad.end)) options.x2 = 0; if (/right/i.test(grad.end)) options.y2 = 0; var i, c, stop, gradient = options.ctx.createLinearGradient(options.x1, options.y1, options.x2, options.y2); for (i = 0; i < grad.colors.length; i++) { c = grad.colors[i]; if (_.isArray(c)) { stop = c[0]; c = c[1]; } else stop = i / (grad.colors.length-1); gradient.addColorStop(stop, Color.parse(c).alpha(opacity)); } return gradient; } }); Flotr.Color = Color; })(); |