paper.js/src/color/HSBColor.js

/*
 * Paper.js
 *
 * This file is part of Paper.js, a JavaScript Vector Graphics Library,
 * based on Scriptographer.org and designed to be largely API compatible.
 * http://paperjs.org/
 * http://scriptographer.org/
 *
 * Distributed under the MIT license. See LICENSE file for details.
 *
 * Copyright (c) 2011, Juerg Lehni & Jonathan Puckey
 * http://lehni.org/ & http://jonathanpuckey.com/
 *
 * All rights reserved.
 */

var HSBColor = this.HSBColor = Color.extend(new function() {
	var components = ['hue', 'saturation', 'brightness', 'alpha'];
	return Base.each(components, function(name) {
		var internalName = '_' + name;
		name = Base.capitalize(name);
		if (name !== 'alpha') {
			this['get' + name] = function() {
				return this[internalName];
			};
			// Avoid overriding setHue:
			if (!this['set' + name]) {
				this['set' + name] = function(value) {
					this._cssString = null;
					this[internalName] = Math.min(Math.max(value, 0), 1);
					return this;
				};
			}
		}
	}, {
		beans: true,
		_colorType: 'hsb',
		_components: components,

		setHue: function(hue) {
			if (hue < 0)
				hue = 360 + hue;
			this._cssString = null;
			this._hue = hue % 360;
			return this;
		}
	});
});