/**
 * Colorize Plugin to highlight anchor text
 *
 * Using color project of John Resig found on:
 * http://plugins.jquery.com/project/color
 *
 * @author michael.kuck@h2g.ch
 * @version 1.00 06-12-2010
 */
(function($) {
	// define the colorize plugin
	$.fn.colorize = function(options) {
		// build main options before initial procedure
		var opts = $.extend({}, $.fn.colorize.defaults, options);
		// jQuery Color Animation by extending jQuery fx functions
		// by John Resig
		// http://plugins.jquery.com/project/color
		// override animation for all of these color styles
		jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'color', 'outlineColor'], function(i,attr) {
			jQuery.fx.step[attr] = function(fx) {
				if (fx.state == 0) {
					fx.start = getColor(fx.elem, attr);
					fx.end = getRGB(fx.end);
				}
				fx.elem.style[attr] = "rgb(" + [
					Math.max(Math.min(parseInt((fx.pos * (fx.end[0] - fx.start[0])) + fx.start[0]), 255), 0),
					Math.max(Math.min(parseInt((fx.pos * (fx.end[1] - fx.start[1])) + fx.start[1]), 255), 0),
					Math.max(Math.min(parseInt((fx.pos * (fx.end[2] - fx.start[2])) + fx.start[2]), 255), 0)
				].join(",") + ")";
			}
		});
		// initialize colorize plugin
		return this.each(function() {
			// build element specific options
			var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
			// requesting colors of element and passive color
			var color = new String(getRGB($(this).css('color')));
			var active = new String(getRGB(o.active));
			var passive = new String(getRGB(o.passive));
			// use only anchors which use passive colors
			if (color.toString() == passive.toString()) {
				$(this).hover(function() {
					$(this).animate({
						color: o.active
					}, o.speed);
				}, function() {
					$(this).animate({
						color: o.passive
					}, o.speed);
				});
			}
		});
	}
	// Color Conversion functions from highlightFade
	// By Blair Mitchelmore
	// http://jquery.offput.ca/highlightFade/
	// parse strings looking for color tuples [255,255,255]
	function getRGB(color) {
		var result;
		
		// Check if we're already dealing with an array of colors
		if ( color && color.constructor == Array && color.length == 3 )
			return color;
		
		// Look for 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 [parseInt(result[1]), parseInt(result[2]), parseInt(result[3])];
		
		// Look for 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 [parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55];
		
		// Look for #a0b1c2
		if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))
			return [parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16)];
		
		// Look for #fff
		if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))
			return [parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)];
		
		// Otherwise, we're most likely dealing with a named color
		return colors[jQuery.trim(color).toLowerCase()];
		
	}
	function getColor(elem, attr) {
		var color;
		
		do {
			color = jQuery.curCSS(elem, attr);
			if (color != '' && color != 'transparent' || jQuery.nodeName(elem, "body"))
				break;
			attr = "backgroundColor";
		} while (elem = elem.parentNode);
		
		return getRGB(color);
	};
	function debug($msg) {
		if (window.console && window.console.log)
			window.console.log('debug: '+$msg);
	}
	$.fn.colorize.defaults = {
		active: '#ff0000',
		passive: '#003366',
		speed: 200
	}	
	// Some named colors to work with
	// From Interface by Stefan Petre
	// http://interface.eyecon.ro/
	var colors = {
		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]
	};
})(jQuery);