--- /dev/null
+Rico.Color = Class.create();
+
+Rico.Color.prototype = {
+
+ initialize: function(red, green, blue) {
+ this.rgb = { r: red, g : green, b : blue };
+ },
+
+ setRed: function(r) {
+ this.rgb.r = r;
+ },
+
+ setGreen: function(g) {
+ this.rgb.g = g;
+ },
+
+ setBlue: function(b) {
+ this.rgb.b = b;
+ },
+
+ setHue: function(h) {
+
+ // get an HSB model, and set the new hue...
+ var hsb = this.asHSB();
+ hsb.h = h;
+
+ // convert back to RGB...
+ this.rgb = Rico.Color.HSBtoRGB(hsb.h, hsb.s, hsb.b);
+ },
+
+ setSaturation: function(s) {
+ // get an HSB model, and set the new hue...
+ var hsb = this.asHSB();
+ hsb.s = s;
+
+ // convert back to RGB and set values...
+ this.rgb = Rico.Color.HSBtoRGB(hsb.h, hsb.s, hsb.b);
+ },
+
+ setBrightness: function(b) {
+ // get an HSB model, and set the new hue...
+ var hsb = this.asHSB();
+ hsb.b = b;
+
+ // convert back to RGB and set values...
+ this.rgb = Rico.Color.HSBtoRGB( hsb.h, hsb.s, hsb.b );
+ },
+
+ darken: function(percent) {
+ var hsb = this.asHSB();
+ this.rgb = Rico.Color.HSBtoRGB(hsb.h, hsb.s, Math.max(hsb.b - percent,0));
+ },
+
+ brighten: function(percent) {
+ var hsb = this.asHSB();
+ this.rgb = Rico.Color.HSBtoRGB(hsb.h, hsb.s, Math.min(hsb.b + percent,1));
+ },
+
+ blend: function(other) {
+ this.rgb.r = Math.floor((this.rgb.r + other.rgb.r)/2);
+ this.rgb.g = Math.floor((this.rgb.g + other.rgb.g)/2);
+ this.rgb.b = Math.floor((this.rgb.b + other.rgb.b)/2);
+ },
+
+ isBright: function() {
+ var hsb = this.asHSB();
+ return this.asHSB().b > 0.5;
+ },
+
+ isDark: function() {
+ return ! this.isBright();
+ },
+
+ asRGB: function() {
+ return "rgb(" + this.rgb.r + "," + this.rgb.g + "," + this.rgb.b + ")";
+ },
+
+ asHex: function() {
+ return "#" + this.rgb.r.toColorPart() + this.rgb.g.toColorPart() + this.rgb.b.toColorPart();
+ },
+
+ asHSB: function() {
+ return Rico.Color.RGBtoHSB(this.rgb.r, this.rgb.g, this.rgb.b);
+ },
+
+ toString: function() {
+ return this.asHex();
+ }
+
+};
+
+Rico.Color.createFromHex = function(hexCode) {
+ if(hexCode.length==4) {
+ var shortHexCode = hexCode;
+ var hexCode = '#';
+ for(var i=1;i<4;i++) hexCode += (shortHexCode.charAt(i) +
+shortHexCode.charAt(i));
+ }
+ if ( hexCode.indexOf('#') == 0 )
+ hexCode = hexCode.substring(1);
+ var red = hexCode.substring(0,2);
+ var green = hexCode.substring(2,4);
+ var blue = hexCode.substring(4,6);
+ return new Rico.Color( parseInt(red,16), parseInt(green,16), parseInt(blue,16) );
+}
+
+/**
+ * Factory method for creating a color from the background of
+ * an HTML element.
+ */
+Rico.Color.createColorFromBackground = function(elem) {
+
+ var actualColor = RicoUtil.getElementsComputedStyle($(elem), "backgroundColor", "background-color");
+
+ if ( actualColor == "transparent" && elem.parentNode )
+ return Rico.Color.createColorFromBackground(elem.parentNode);
+
+ if ( actualColor == null )
+ return new Rico.Color(255,255,255);
+
+ if ( actualColor.indexOf("rgb(") == 0 ) {
+ var colors = actualColor.substring(4, actualColor.length - 1 );
+ var colorArray = colors.split(",");
+ return new Rico.Color( parseInt( colorArray[0] ),
+ parseInt( colorArray[1] ),
+ parseInt( colorArray[2] ) );
+
+ }
+ else if ( actualColor.indexOf("#") == 0 ) {
+ return Rico.Color.createFromHex(actualColor);
+ }
+ else
+ return new Rico.Color(255,255,255);
+}
+
+Rico.Color.HSBtoRGB = function(hue, saturation, brightness) {
+
+ var red = 0;
+ var green = 0;
+ var blue = 0;
+
+ if (saturation == 0) {
+ red = parseInt(brightness * 255.0 + 0.5);
+ green = red;
+ blue = red;
+ }
+ else {
+ var h = (hue - Math.floor(hue)) * 6.0;
+ var f = h - Math.floor(h);
+ var p = brightness * (1.0 - saturation);
+ var q = brightness * (1.0 - saturation * f);
+ var t = brightness * (1.0 - (saturation * (1.0 - f)));
+
+ switch (parseInt(h)) {
+ case 0:
+ red = (brightness * 255.0 + 0.5);
+ green = (t * 255.0 + 0.5);
+ blue = (p * 255.0 + 0.5);
+ break;
+ case 1:
+ red = (q * 255.0 + 0.5);
+ green = (brightness * 255.0 + 0.5);
+ blue = (p * 255.0 + 0.5);
+ break;
+ case 2:
+ red = (p * 255.0 + 0.5);
+ green = (brightness * 255.0 + 0.5);
+ blue = (t * 255.0 + 0.5);
+ break;
+ case 3:
+ red = (p * 255.0 + 0.5);
+ green = (q * 255.0 + 0.5);
+ blue = (brightness * 255.0 + 0.5);
+ break;
+ case 4:
+ red = (t * 255.0 + 0.5);
+ green = (p * 255.0 + 0.5);
+ blue = (brightness * 255.0 + 0.5);
+ break;
+ case 5:
+ red = (brightness * 255.0 + 0.5);
+ green = (p * 255.0 + 0.5);
+ blue = (q * 255.0 + 0.5);
+ break;
+ }
+ }
+
+ return { r : parseInt(red), g : parseInt(green) , b : parseInt(blue) };
+}
+
+Rico.Color.RGBtoHSB = function(r, g, b) {
+
+ var hue;
+ var saturation;
+ var brightness;
+
+ var cmax = (r > g) ? r : g;
+ if (b > cmax)
+ cmax = b;
+
+ var cmin = (r < g) ? r : g;
+ if (b < cmin)
+ cmin = b;
+
+ brightness = cmax / 255.0;
+ if (cmax != 0)
+ saturation = (cmax - cmin)/cmax;
+ else
+ saturation = 0;
+
+ if (saturation == 0)
+ hue = 0;
+ else {
+ var redc = (cmax - r)/(cmax - cmin);
+ var greenc = (cmax - g)/(cmax - cmin);
+ var bluec = (cmax - b)/(cmax - cmin);
+
+ if (r == cmax)
+ hue = bluec - greenc;
+ else if (g == cmax)
+ hue = 2.0 + redc - bluec;
+ else
+ hue = 4.0 + greenc - redc;
+
+ hue = hue / 6.0;
+ if (hue < 0)
+ hue = hue + 1.0;
+ }
+
+ return { h : hue, s : saturation, b : brightness };
+}
+
projects / rails.git / blobdiff