Subversion Repositories Applications.papyrus

/*
        Copyright (c) 2004-2006, The Dojo Foundation
        All Rights Reserved.

        Licensed under the Academic Free License version 2.1 or above OR the
        modified BSD license. For more information on Dojo licensing, see:

                http://dojotoolkit.org/community/licensing.shtml
*/



dojo.provide("dojo.gfx.color");
dojo.require("dojo.lang.common");
dojo.require("dojo.lang.array");
dojo.gfx.color.Color = function (r, g, b, a) {
        if (dojo.lang.isArray(r)) {
                this.r = r[0];
                this.g = r[1];
                this.b = r[2];
                this.a = r[3] || 1;
        } else {
                if (dojo.lang.isString(r)) {
                        var rgb = dojo.gfx.color.extractRGB(r);
                        this.r = rgb[0];
                        this.g = rgb[1];
                        this.b = rgb[2];
                        this.a = g || 1;
                } else {
                        if (r instanceof dojo.gfx.color.Color) {
                                this.r = r.r;
                                this.b = r.b;
                                this.g = r.g;
                                this.a = r.a;
                        } else {
                                this.r = r;
                                this.g = g;
                                this.b = b;
                                this.a = a;
                        }
                }
        }
};
dojo.gfx.color.Color.fromArray = function (arr) {
        return new dojo.gfx.color.Color(arr[0], arr[1], arr[2], arr[3]);
};
dojo.extend(dojo.gfx.color.Color, {toRgb:function (includeAlpha) {
        if (includeAlpha) {
                return this.toRgba();
        } else {
                return [this.r, this.g, this.b];
        }
}, toRgba:function () {
        return [this.r, this.g, this.b, this.a];
}, toHex:function () {
        return dojo.gfx.color.rgb2hex(this.toRgb());
}, toCss:function () {
        return "rgb(" + this.toRgb().join() + ")";
}, toString:function () {
        return this.toHex();
}, blend:function (color, weight) {
        var rgb = null;
        if (dojo.lang.isArray(color)) {
                rgb = color;
        } else {
                if (color instanceof dojo.gfx.color.Color) {
                        rgb = color.toRgb();
                } else {
                        rgb = new dojo.gfx.color.Color(color).toRgb();
                }
        }
        return dojo.gfx.color.blend(this.toRgb(), rgb, weight);
}});
dojo.gfx.color.named = {white:[255, 255, 255], black:[0, 0, 0], red:[255, 0, 0], green:[0, 255, 0], lime:[0, 255, 0], blue:[0, 0, 255], navy:[0, 0, 128], gray:[128, 128, 128], silver:[192, 192, 192]};
dojo.gfx.color.blend = function (a, b, weight) {
        if (typeof a == "string") {
                return dojo.gfx.color.blendHex(a, b, weight);
        }
        if (!weight) {
                weight = 0;
        }
        weight = Math.min(Math.max(-1, weight), 1);
        weight = ((weight + 1) / 2);
        var c = [];
        for (var x = 0; x < 3; x++) {
                c[x] = parseInt(b[x] + ((a[x] - b[x]) * weight));
        }
        return c;
};
dojo.gfx.color.blendHex = function (a, b, weight) {
        return dojo.gfx.color.rgb2hex(dojo.gfx.color.blend(dojo.gfx.color.hex2rgb(a), dojo.gfx.color.hex2rgb(b), weight));
};
dojo.gfx.color.extractRGB = function (color) {
        var hex = "0123456789abcdef";
        color = color.toLowerCase();
        if (color.indexOf("rgb") == 0) {
                var matches = color.match(/rgba*\((\d+), *(\d+), *(\d+)/i);
                var ret = matches.splice(1, 3);
                return ret;
        } else {
                var colors = dojo.gfx.color.hex2rgb(color);
                if (colors) {
                        return colors;
                } else {
                        return dojo.gfx.color.named[color] || [255, 255, 255];
                }
        }
};
dojo.gfx.color.hex2rgb = function (hex) {
        var hexNum = "0123456789ABCDEF";
        var rgb = new Array(3);
        if (hex.indexOf("#") == 0) {
                hex = hex.substring(1);
        }
        hex = hex.toUpperCase();
        if (hex.replace(new RegExp("[" + hexNum + "]", "g"), "") != "") {
                return null;
        }
        if (hex.length == 3) {
                rgb[0] = hex.charAt(0) + hex.charAt(0);
                rgb[1] = hex.charAt(1) + hex.charAt(1);
                rgb[2] = hex.charAt(2) + hex.charAt(2);
        } else {
                rgb[0] = hex.substring(0, 2);
                rgb[1] = hex.substring(2, 4);
                rgb[2] = hex.substring(4);
        }
        for (var i = 0; i < rgb.length; i++) {
                rgb[i] = hexNum.indexOf(rgb[i].charAt(0)) * 16 + hexNum.indexOf(rgb[i].charAt(1));
        }
        return rgb;
};
dojo.gfx.color.rgb2hex = function (r, g, b) {
        if (dojo.lang.isArray(r)) {
                g = r[1] || 0;
                b = r[2] || 0;
                r = r[0] || 0;
        }
        var ret = dojo.lang.map([r, g, b], function (x) {
                x = new Number(x);
                var s = x.toString(16);
                while (s.length < 2) {
                        s = "0" + s;
                }
                return s;
        });
        ret.unshift("#");
        return ret.join("");
};