/* 
	slideshow.js
	Provide functionality for feature slide show presentations.

	:AUTHOR: James Green
	:CREATED: September 03, 2008
	
	:UPDATED:
	JG 09/03/2008 - Initial setup.
	JG 10/02/2008 - Modified slide show defined area to support both the corporate style and ldc style.
	JG 11/12/2008 - Modified slide show to retrieve images from an external source.
	
	:DEPENDENCIES:
	/lib/jquery.1.2.6.js
	/lib/jquery.ifixpng2.js
	/lib/cycle-2.26/jquery.cycle.all.js
		 * jQuery Cycle Plugin for light-weight slideshows
		 * Examples and documentation at: http://malsup.com/jquery/cycle/
		 * Copyright (c) 2007-2008 M. Alsup
		 * Version: 2.26 (08/28/2008)
		 * Dual licensed under the MIT and GPL licenses:
		 * http://www.opensource.org/licenses/mit-license.php
		 * http://www.gnu.org/licenses/gpl.html
		 * Requires: jQuery v1.2.3 or later
		 *
		 * Based on the work of:
		 *  1) Matt Oakes (http://portfolio.gizone.co.uk/applications/slideshow/)
		 *  2) Torsten Baldes (http://medienfreunde.com/lab/innerfade/)
		 *  3) Benjamin Sterling (http://www.benjaminsterling.com/experiments/jqShuffle/)
	
*/
function slideShowManager(source, target) {
	var re = new RegExp('.*src=".*\/images\/features.*');
	var slides = $(source).html();
	var s = slides.split("<");
	var t = new Array();
	for (var i in s) {
		if (re.test(s[i])) t.push("<"+s[i]); // Only keep if it's a featured image.
	}
	s = t;
	slides = t.join("");
	var totalSlideCount = s.length; 
	
	$(target).empty(); // Remove any existing images from target.
	$(target).append(slides); // Add new images retrieved from source file.
	
	$(target).cycle({
		fx:'fade',
		speed:1000,
		timeout:5000,
		next:'#ss-main-feature-next',
		prev:'#ss-main-feature-prev',
		pause:0,
		before: loadSlides
	});

	function loadSlides(curr, next, opts, fwd) {
		// on Before arguments: 
		//  curr == DOM element for the slide that is currently being displayed 
		//  next == DOM element for the slide that is about to be displayed 
		//  opts == slideshow options 
		//  fwd  == true if cycling forward, false if cycling backward 
			 
		// on the first pass, addSlide is undefined (plugin hasn't yet created the fn yet) 
		if (!opts.addSlide) 
			return; 
			 
		// have we added all our slides? 
		if (opts.slideCount == totalSlideCount) 
			return; 

		// shift or pop from our slide array  
		var nextSlideSrc = fwd ? s.shift() : s.pop(); 
		 
		// add our next slide 
		opts.addSlide(nextSlideSrc, fwd == false); 
	};

	if (totalSlideCount <= 1) $("#ss-main-feature-controls").hide();
	//$(target + " img").show();

// Toggle the pause and play button.
$('#ss-main-feature-pause-play').toggle(
	function() {
		$(target).cycle('pause');
		$('#ss-main-feature-pause-play').attr({
			alt:"Play Slideshow",
			title:"Play Slideshow"
		});
		$('#ss-pause').css({
			visibility:"hidden"
		});
		$('#ss-play').css({
			visibility:"visible"
		});
	},
	function() {
		$(target).cycle('resume');
		$('#ss-main-feature-pause-play').attr({
			alt:"Pause Slideshow",
			title:"Pause Slideshow"
		});
		$('#ss-pause').css({
			visibility:"visible"
		});
		$('#ss-play').css({
			visibility:"hidden"
		});
	});
}