| 2150 |
mathias |
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if(!dojo._hasResource["dojo._base.Color"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo._base.Color"] = true;
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dojo.provide("dojo._base.Color");
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dojo.require("dojo._base.array");
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dojo.require("dojo._base.lang");
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dojo.Color = function(/*Array|String|Object*/ color){
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// summary:
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// takes a named string, hex string, array of rgb or rgba values,
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// an object with r, g, b, and a properties, or another dojo.Color object
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if(color){ this.setColor(color); }
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};
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// FIXME: there's got to be a more space-efficient way to encode or discover these!! Use hex?
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dojo.Color.named = {
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black: [0,0,0],
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silver: [192,192,192],
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gray: [128,128,128],
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white: [255,255,255],
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maroon: [128,0,0],
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red: [255,0,0],
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purple: [128,0,128],
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fuchsia: [255,0,255],
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green: [0,128,0],
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lime: [0,255,0],
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olive: [128,128,0],
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yellow: [255,255,0],
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navy: [0,0,128],
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blue: [0,0,255],
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teal: [0,128,128],
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aqua: [0,255,255]
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};
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dojo.extend(dojo.Color, {
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r: 255, g: 255, b: 255, a: 1,
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_set: function(r, g, b, a){
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var t = this; t.r = r; t.g = g; t.b = b; t.a = a;
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},
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setColor: function(/*Array|String|Object*/ color){
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// summary:
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// takes a named string, hex string, array of rgb or rgba values,
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// an object with r, g, b, and a properties, or another dojo.Color object
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var d = dojo;
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if(d.isString(color)){
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d.colorFromString(color, this);
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}else if(d.isArray(color)){
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d.colorFromArray(color, this);
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}else{
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this._set(color.r, color.g, color.b, color.a);
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if(!(color instanceof d.Color)){ this.sanitize(); }
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}
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return this; // dojo.Color
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},
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sanitize: function(){
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// summary:
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// makes sure that the object has correct attributes
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// description:
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// the default implementation does nothing, include dojo.colors to
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// augment it to real checks
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return this; // dojo.Color
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},
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toRgb: function(){
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// summary: returns 3 component array of rgb values
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var t = this;
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return [t.r, t.g, t.b]; // Array
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},
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toRgba: function(){
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// summary: returns a 4 component array of rgba values
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var t = this;
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return [t.r, t.g, t.b, t.a]; // Array
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},
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toHex: function(){
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// summary: returns a css color string in hexadecimal representation
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var arr = dojo.map(["r", "g", "b"], function(x){
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var s = this[x].toString(16);
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return s.length < 2 ? "0" + s : s;
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}, this);
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return "#" + arr.join(""); // String
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},
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toCss: function(/*Boolean?*/ includeAlpha){
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// summary: returns a css color string in rgb(a) representation
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var t = this, rgb = t.r + ", " + t.g + ", " + t.b;
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return (includeAlpha ? "rgba(" + rgb + ", " + t.a : "rgb(" + rgb) + ")"; // String
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},
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toString: function(){
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// summary: returns a visual representation of the color
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return this.toCss(true); // String
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}
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});
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dojo.blendColors = function(
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/*dojo.Color*/ start,
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/*dojo.Color*/ end,
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/*Number*/ weight,
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/*dojo.Color?*/ obj
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){
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// summary:
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// blend colors end and start with weight from 0 to 1, 0.5 being a 50/50 blend,
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// can reuse a previously allocated dojo.Color object for the result
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var d = dojo, t = obj || new dojo.Color();
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d.forEach(["r", "g", "b", "a"], function(x){
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t[x] = start[x] + (end[x] - start[x]) * weight;
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if(x != "a"){ t[x] = Math.round(t[x]); }
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});
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return t.sanitize(); // dojo.Color
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};
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dojo.colorFromRgb = function(/*String*/ color, /*dojo.Color?*/ obj){
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// summary: get rgb(a) array from css-style color declarations
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var m = color.toLowerCase().match(/^rgba?\(([\s\.,0-9]+)\)/);
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return m && dojo.colorFromArray(m[1].split(/\s*,\s*/), obj); // dojo.Color
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};
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dojo.colorFromHex = function(/*String*/ color, /*dojo.Color?*/ obj){
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// summary: converts a hex string with a '#' prefix to a color object.
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// Supports 12-bit #rgb shorthand.
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var d = dojo, t = obj || new d.Color(),
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bits = (color.length == 4) ? 4 : 8,
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mask = (1 << bits) - 1;
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color = Number("0x" + color.substr(1));
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if(isNaN(color)){
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return null; // dojo.Color
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}
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d.forEach(["b", "g", "r"], function(x){
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var c = color & mask;
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color >>= bits;
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t[x] = bits == 4 ? 17 * c : c;
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});
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t.a = 1;
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return t; // dojo.Color
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};
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dojo.colorFromArray = function(/*Array*/ a, /*dojo.Color?*/ obj){
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// summary: builds a color from 1, 2, 3, or 4 element array
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var t = obj || new dojo.Color();
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t._set(Number(a[0]), Number(a[1]), Number(a[2]), Number(a[3]));
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if(isNaN(t.a)){ t.a = 1; }
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return t.sanitize(); // dojo.Color
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};
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dojo.colorFromString = function(/*String*/ str, /*dojo.Color?*/ obj){
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// summary:
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// parses str for a color value.
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// description:
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// Acceptable input values for str may include arrays of any form
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// accepted by dojo.colorFromArray, hex strings such as "#aaaaaa", or
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// rgb or rgba strings such as "rgb(133, 200, 16)" or "rgba(10, 10,
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// 10, 50)"
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// returns:
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// a dojo.Color object. If obj is passed, it will be the return value.
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var a = dojo.Color.named[str];
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return a && dojo.colorFromArray(a, obj) || dojo.colorFromRgb(str, obj) || dojo.colorFromHex(str, obj);
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};
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}
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