/*
	Kwicks for jQuery (version 1.5.1)
	Copyright (c) 2008 Jeremy Martin
	http://www.jeremymartin.name/projects.php?project=kwicks
	
	Licensed under the MIT license:
		http://www.opensource.org/licenses/mit-license.php

	Any and all use of this script must be accompanied by this copyright/license notice in its present form.
*/

(function($) {
	$.fn.kwicks = function(options)  {
		var defaults =  {
			isVertical: false,
			sticky: false,
			defaultKwick: 0,
			event: 'mouseover',
			spacing: 0,
			duration: 500
		 } ;
		var o = $.extend(defaults, options);
		var WoH = (o.isVertical ? 'height' : 'width'); // WoH = Width or Height
		var LoT = (o.isVertical ? 'top' : 'left'); // LoT = Left or Top
		
		return this.each(function()  {
			container = $(this);
			var kwicks = container.children('li');
			var normWoH = kwicks.eq(0).css(WoH).replace(/px/,''); // normWoH = Normal Width or Height
			if(!o.max)  {
				o.max = (normWoH * kwicks.size()) - (o.min * (kwicks.size() - 1));
			 }  else  {
				o.min = ((normWoH * kwicks.size()) - o.max) / (kwicks.size() - 1);
			 } 
			// set width of container ul
			if(o.isVertical)  {
				container.css( {
					width : kwicks.eq(0).css('width'),
					height : (normWoH * kwicks.size()) + (o.spacing * (kwicks.size() - 1)) + 'px'
				 } );				
			 }  else  {
				container.css( {
					width : (normWoH * kwicks.size()) + (o.spacing * (kwicks.size() - 1)) + 'px',
					height : kwicks.eq(0).css('height')
				 } );				
			 } 

			// pre calculate left or top values for all kwicks but the first and last
			// i = index of currently hovered kwick, j = index of kwick we're calculating
			var preCalcLoTs = []; // preCalcLoTs = pre-calculated Left or Top's
			for(i = 0; i < kwicks.size(); i++)  {
				preCalcLoTs[i] = [];
				// don't need to calculate values for first or last kwick
				for(j = 1; j < kwicks.size() - 1; j++)  {
					if(i == j)  {
						preCalcLoTs[i][j] = o.isVertical ? j * o.min + (j * o.spacing) : j * o.min + (j * o.spacing);
					 }  else  {
						preCalcLoTs[i][j] = (j <= i ? (j * o.min) : (j-1) * o.min + o.max) + (j * o.spacing);
					 } 
				 } 
			 } 
			
			// loop through all kwick elements
			kwicks.each(function(i)  {
				var kwick = $(this);
				// set initial width or height and left or top values
				// set first kwick
				if(i === 0)  {
					kwick.css(LoT, '0px');
				 }  
				// set last kwick
				else if(i == kwicks.size() - 1)  {
					kwick.css(o.isVertical ? 'bottom' : 'right', '0px');
				 } 
				// set all other kwicks
				else  {
					if(o.sticky)  {
						kwick.css(LoT, preCalcLoTs[o.defaultKwick][i]);
					 }  else  {
						kwick.css(LoT, (i * normWoH) + (i * o.spacing));
					 } 
				 } 
				// correct size in sticky mode
				if(o.sticky)  {
					if(o.defaultKwick == i)  {
						kwick.css(WoH, o.max + 'px');
						kwick.addClass('active');
					 }  else  {
						kwick.css(WoH, o.min + 'px');
					 } 
				 } 
				kwick.css( {
					margin: 0,
					position: 'absolute'
				 } );
				
				kwick.bind(o.event, function()  {
					// calculate previous width or heights and left or top values
					var prevWoHs = []; // prevWoHs = previous Widths or Heights
					var prevLoTs = []; // prevLoTs = previous Left or Tops
					kwicks.stop().removeClass('active');
					for(j = 0; j < kwicks.size(); j++)  {
						prevWoHs[j] = kwicks.eq(j).css(WoH).replace(/px/, '');
						prevLoTs[j] = kwicks.eq(j).css(LoT).replace(/px/, '');
					 } 
					var aniObj =  { } ;
					aniObj[WoH] = o.max;
					var maxDif = o.max - prevWoHs[i];
					var prevWoHsMaxDifRatio = prevWoHs[i]/maxDif;
					kwick.addClass('active').animate(aniObj,  {
						step: function(now)  {
							// calculate animation completeness as percentage
							var percentage = maxDif != 0 ? now/maxDif - prevWoHsMaxDifRatio : 1;
							// adjsut other elements based on percentage
							kwicks.each(function(j)  {
								if(j != i)  {
									kwicks.eq(j).css(WoH, prevWoHs[j] - ((prevWoHs[j] - o.min) * percentage) + 'px');
								 } 
								if(j > 0 && j < kwicks.size() - 1)  { // if not the first or last kwick
									kwicks.eq(j).css(LoT, prevLoTs[j] - ((prevLoTs[j] - preCalcLoTs[i][j]) * percentage) + 'px');
								 } 
							 } );
						 } ,
						duration: o.duration,
						easing: o.easing
					 } );
				 } );
			 } );
			if(!o.sticky)  {
				container.bind("mouseleave", function()  {
					var prevWoHs = [];
					var prevLoTs = [];
					kwicks.removeClass('active').stop();
					for(i = 0; i < kwicks.size(); i++)  {
						prevWoHs[i] = kwicks.eq(i).css(WoH).replace(/px/, '');
						prevLoTs[i] = kwicks.eq(i).css(LoT).replace(/px/, '');
					 } 
					var aniObj =  { } ;
					aniObj[WoH] = normWoH;
					var normDif = normWoH - prevWoHs[0];
					kwicks.eq(0).animate(aniObj,  {
						step: function(now)  {
							var percentage = normDif != 0 ? (now - prevWoHs[0])/normDif : 1;
							for(i = 1; i < kwicks.size(); i++)  {
								kwicks.eq(i).css(WoH, prevWoHs[i] - ((prevWoHs[i] - normWoH) * percentage) + 'px');
								if(i < kwicks.size() - 1)  {
									kwicks.eq(i).css(LoT, prevLoTs[i] - ((prevLoTs[i] - ((i * normWoH) + (i * o.spacing))) * percentage) + 'px');
								 } 
							 } 
						 } ,
						duration: o.duration,
						easing: o.easing
					 } );
				 } );
			 } 
		 } );
	 } ;
 } )(jQuery);