/* Ultimate Fade-in slideshow (v2.4)
* Last updated: May 24th, 2010. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize
//May 24th, 10' (v2.4): Adds new "peakaboo" option to "descreveal" setting. oninit and onslide event handlers added.

var fadeSlideShow_descpanel = {
	controls: [['x.png', 7, 7], ['restore.png', 10, 11], ['loading.gif', 54, 55]], //full URL and dimensions of close, restore, and loading images
	fontStyle: 'normal 11px Verdana', //font style for text descriptions
	slidespeed: 200 //speed of description panel animation (in millisec)
};
//No need to edit beyond here...

jQuery.noConflict();

function fadeSlideShow(settingarg) {
	this.setting = settingarg;
	settingarg = null;
	var setting = this.setting;
	setting.fadeduration = setting.fadeduration ? parseInt(setting.fadeduration) : 500;
	setting.curimage = (setting.persist) ? fadeSlideShow.routines.getCookie("gallery-" + setting.wrapperid) : 0;
	setting.curimage = setting.curimage || 0; //account for curimage being null if cookie is empty
	setting.currentstep = 0; //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
	setting.totalsteps = setting.imagearray.length * (setting.displaymode.cycles > 0 ? setting.displaymode.cycles : Infinity); //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
	setting.fglayer = 0, setting.bglayer = 1; //index of active and background layer (switches after each change of slide)
	setting.oninit = setting.oninit || function() {
	};
	setting.onslide = setting.onslide || function() {
	};
	if (setting.displaymode.randomize) //randomly shuffle order of images?
		setting.imagearray.sort(function() { return 0.5 - Math.random(); });
	var preloadimages = []; //preload images
	setting.longestdesc = ""; //get longest description of all slides. If no desciptions defined, variable contains ""
	for (var i = 0; i < setting.imagearray.length; i++) { //preload images
		preloadimages[i] = new Image();
		preloadimages[i].src = setting.imagearray[i][0];
		if (setting.imagearray[i][3] && setting.imagearray[i][3].length > setting.longestdesc.length)
			setting.longestdesc = setting.imagearray[i][3];
	}
	var closebutt = fadeSlideShow_descpanel.controls[0]; //add close button to "desc" panel if descreveal="always"
	setting.closebutton = (setting.descreveal == "always") ? '<img class="close" src="' + closebutt[0] + '" style="float:right;cursor:hand;cursor:pointer;width:' + closebutt[1] + 'px;height:' + closebutt[2] + 'px;margin-left:2px" title="Hide Description" />' : '';
	var slideshow = this;
	jQuery(document).ready(function($) { //fire on DOM ready
		var setting = slideshow.setting;
		var fullhtml = fadeSlideShow.routines.getFullHTML(setting.imagearray); //get full HTML of entire slideshow
		setting.$wrapperdiv = $('#' + setting.wrapperid).css({ position: 'relative', visibility: 'visible', background: 'black', overflow: 'hidden', width: setting.dimensions[0], height: setting.dimensions[1] }).empty(); //main slideshow DIV
		if (setting.$wrapperdiv.length == 0) { //if no wrapper DIV found
			alert("Error: DIV with ID \"" + setting.wrapperid + "\" not found on page.");
			return;
		}
		setting.$gallerylayers = $('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 
			.css({ position: 'absolute', left: 0, top: 0, width: '100%', height: '100%', background: 'black' })
			.appendTo(setting.$wrapperdiv);
		var $loadingimg = $('<img src="' + fadeSlideShow_descpanel.controls[2][0] + '" style="position:absolute;width:' + fadeSlideShow_descpanel.controls[2][1] + ';height:' + fadeSlideShow_descpanel.controls[2][2] + '" />')
			.css({ left: setting.dimensions[0] / 2 - fadeSlideShow_descpanel.controls[2][1] / 2, top: setting.dimensions[1] / 2 - fadeSlideShow_descpanel.controls[2][2] }) //center loading gif
			.appendTo(setting.$wrapperdiv);
		var $curimage = setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage); //prefill both layers with entire slideshow content, hide all images, and return current image
		if (setting.longestdesc != "" && setting.descreveal != "none") { //if at least one slide contains a description (versus feature is enabled but no descriptions defined) and descreveal not explicitly disabled
			fadeSlideShow.routines.adddescpanel($, setting);
			if (setting.descreveal == "always") { //position desc panel so it's visible to begin with
				setting.$descpanel.css({ top: setting.dimensions[1] - setting.panelheight });
				setting.$descinner.click(function(e) { //asign click behavior to "close" icon
					if (e.target.className == "close") {
						slideshow.showhidedescpanel('hide');
					}
				});
				setting.$restorebutton.click(function(e) { //asign click behavior to "restore" icon
					slideshow.showhidedescpanel('show');
					$(this).css({ visibility: 'hidden' });
				});
			} else if (setting.descreveal == "ondemand") { //display desc panel on demand (mouseover)
				setting.$wrapperdiv.bind('mouseenter', function() { slideshow.showhidedescpanel('show'); });
				setting.$wrapperdiv.bind('mouseleave', function() { slideshow.showhidedescpanel('hide'); });
			}
		}
		setting.$wrapperdiv.bind('mouseenter', function() { setting.ismouseover = true; }); //pause slideshow mouseover
		setting.$wrapperdiv.bind('mouseleave', function() { setting.ismouseover = false; });
		if ($curimage.get(0).complete) { //accounf for IE not firing image.onload
			$loadingimg.hide();
			slideshow.paginateinit($);
			slideshow.showslide(setting.curimage);
		} else { //initialize slideshow when first image has fully loaded
			$loadingimg.hide();
			slideshow.paginateinit($);
			$curimage.bind('load', function() { slideshow.showslide(setting.curimage); });
		}
		setting.oninit.call(slideshow); //trigger oninit() event
		$(window).bind('unload', function() { //clean up and persist
			if (slideshow.setting.persist) //remember last shown image's index
				fadeSlideShow.routines.setCookie("gallery-" + setting.wrapperid, setting.curimage);
			jQuery.each(slideshow.setting, function(k) {
				if (slideshow.setting[k] instanceof Array) {
					for (var i = 0; i < slideshow.setting[k].length; i++) {
						if (slideshow.setting[k][i].tagName == "DIV") //catches 2 gallerylayer divs, gallerystatus div
							slideshow.setting[k][i].innerHTML = null;
						slideshow.setting[k][i] = null;
					}
				}
			});
			slideshow = slideshow.setting = null;
		});
	});
}

fadeSlideShow.prototype = {
	navigate: function(keyword) {
	var setting = this.setting;
	clearTimeout(setting.playtimer);
	if (setting.displaymode.type == "auto") { //in auto mode
		setting.displaymode.type = "manual"; //switch to "manual" mode when nav buttons are clicked on
		setting.displaymode.wraparound = true; //set wraparound option to true
	}
	if (!isNaN(parseInt(keyword))) { //go to specific slide?
		this.showslide(parseInt(keyword));
	} else if ( /(prev)|(next)/i .test(keyword)) { //go back or forth inside slide?
		this.showslide(keyword.toLowerCase());
	}
},

	showslide: function(keyword) {
		var slideshow = this;
		var setting = slideshow.setting;
		if (setting.displaymode.type == "auto" && setting.ismouseover && setting.currentstep <= setting.totalsteps) { //if slideshow in autoplay mode and mouse is over it, pause it
			setting.playtimer = setTimeout(function() { slideshow.showslide('next'); }, setting.displaymode.pause);
			return;
		}
		var totalimages = setting.imagearray.length;
		var imgindex = (keyword == "next") ? (setting.curimage < totalimages - 1 ? setting.curimage + 1 : 0)
			: (keyword == "prev") ? (setting.curimage > 0 ? setting.curimage - 1 : totalimages - 1)
				: Math.min(keyword, totalimages - 1);
		var $slideimage = setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show(); //hide all images except current one
		var imgdimensions = [$slideimage.width(), $slideimage.height()]; //center align image
		$slideimage.css({ marginLeft: (imgdimensions[0] > 0 && imgdimensions[0] < setting.dimensions[0]) ? setting.dimensions[0] / 2 - imgdimensions[0] / 2 : 0 });
		$slideimage.css({ marginTop: (imgdimensions[1] > 0 && imgdimensions[1] < setting.dimensions[1]) ? setting.dimensions[1] / 2 - imgdimensions[1] / 2 : 0 });
		if (setting.descreveal == "peekaboo" && setting.longestdesc != "") { //if descreveal is set to "peekaboo", make sure description panel is hidden before next slide is shown
			clearTimeout(setting.hidedesctimer); //clear hide desc panel timer
			slideshow.showhidedescpanel('hide', 0); //and hide it immediately
		}
		setting.$gallerylayers.eq(setting.bglayer).css({ zIndex: 1000, opacity: 0 }) //background layer becomes foreground
			.stop().css({ opacity: 0 }).animate({ opacity: 1 }, setting.fadeduration, function() { //Callback function after fade animation is complete:
				clearTimeout(setting.playtimer);
				try {
					setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage);
				} catch(e) {
					alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: " + e);
				}
				if (setting.descreveal == "peekaboo" && setting.longestdesc != "") {
					slideshow.showhidedescpanel('show');
					setting.hidedesctimer = setTimeout(function() { slideshow.showhidedescpanel('hide'); }, setting.displaymode.pause - fadeSlideShow_descpanel.slidespeed);
				}
				setting.currentstep += 1;
				if (setting.displaymode.type == "auto") {
					if (setting.currentstep <= setting.totalsteps || setting.displaymode.cycles == 0)
						setting.playtimer = setTimeout(function() { slideshow.showslide('next'); }, setting.displaymode.pause);
				}
			}); //end callback function
		setting.$gallerylayers.eq(setting.fglayer).css({ zIndex: 999 }); //foreground layer becomes background
		setting.fglayer = setting.bglayer;
		setting.bglayer = (setting.bglayer == 0) ? 1 : 0;
		setting.curimage = imgindex;
		if (setting.$descpanel) {
			setting.$descpanel.css({ visibility: (setting.imagearray[imgindex][3]) ? 'visible' : 'hidden' });
			if (setting.imagearray[imgindex][3]) //if this slide contains a description
				setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3]);
		}
		if (setting.displaymode.type == "manual" && !setting.displaymode.wraparound) {
			this.paginatecontrol();
		}
		if (setting.$status) //if status container defined
			setting.$status.html(setting.curimage + 1 + "/" + totalimages);
	},

	showhidedescpanel: function(state, animateduration) {
		var setting = this.setting;
		var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1];
		setting.$descpanel.stop().animate({ top: endpoint }, (typeof animateduration != "undefined" ? animateduration : fadeSlideShow_descpanel.slidespeed), function() {
			if (setting.descreveal == "always" && state == "hide")
				setting.$restorebutton.css({ visibility: 'visible' }); //show restore button
		});
	},

	paginateinit: function($) {
		var slideshow = this;
		var setting = this.setting;
		if (setting.togglerid) { //if toggler div defined
			setting.$togglerdiv = $("#" + setting.togglerid);
			setting.$prev = setting.$togglerdiv.find('.prev').data('action', 'prev');
			setting.$next = setting.$togglerdiv.find('.next').data('action', 'next');
			setting.$prev.add(setting.$next).click(function(e) { //assign click behavior to prev and next controls
				var $target = $(this);
				slideshow.navigate($target.data('action'));
				e.preventDefault();
			});
			setting.$status = setting.$togglerdiv.find('.status');
		}
	},

	paginatecontrol: function() {
		var setting = this.setting;
		setting.$prev.css({ opacity: (setting.curimage == 0) ? 0.4 : 1 }).data('action', (setting.curimage == 0) ? 'none' : 'prev');
		setting.$next.css({ opacity: (setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1 }).data('action', (setting.curimage == setting.imagearray.length - 1) ? 'none' : 'next');
		if (document.documentMode == 8) { //in IE8 standards mode, apply opacity to inner image of link
			setting.$prev.find('img:eq(0)').css({ opacity: (setting.curimage == 0) ? 0.4 : 1 });
			setting.$next.find('img:eq(0)').css({ opacity: (setting.curimage == setting.imagearray.length - 1) ? 0.4 : 1 });
		}
	}	
};
fadeSlideShow.routines = {
	getSlideHTML: function(imgelement) {
	var layerHTML = (imgelement[1]) ? '<a href="' + imgelement[1] + '" target="' + imgelement[2] + '">\n' : ''; //hyperlink slide?
	layerHTML += '<img src="' + imgelement[0] + '" style="border-width:0;" />\n';
	layerHTML += (imgelement[1]) ? '</a>\n' : '';
	return layerHTML; //return HTML for this layer
},

	getFullHTML: function(imagearray) {
		var preloadhtml = '';
		for (var i = 0; i < imagearray.length; i++)
			preloadhtml += this.getSlideHTML(imagearray[i]);
		return preloadhtml;
	},

	adddescpanel: function($, setting) {
		setting.$descpanel = $('<div class="fadeslidedescdiv"></div>')
			.css({ position: 'absolute', visibility: 'hidden', width: '100%', left: 0, top: setting.dimensions[1], font: fadeSlideShow_descpanel.fontStyle, zIndex: '1001' })
			.appendTo(setting.$wrapperdiv);
		$('<div class="descpanelbg"></div><div class="descpanelfg"></div>') //create inner nav panel DIVs
			.css({ position: 'absolute', left: 0, top: 0, width: setting.$descpanel.width() - 8, padding: '4px' })
			.eq(0).css({ background: 'black', opacity: 0.7 }).end() //"descpanelbg" div
			.eq(1).css({ color: 'white' }).html(setting.closebutton + setting.longestdesc).end() //"descpanelfg" div
			.appendTo(setting.$descpanel);
		setting.$descinner = setting.$descpanel.find('div.descpanelfg');
		setting.panelheight = setting.$descinner.outerHeight();
		setting.$descpanel.css({ height: setting.panelheight }).find('div').css({ height: '100%' });
		if (setting.descreveal == "always") { //create restore button
			setting.$restorebutton = $('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] + '" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:1002;width:' + fadeSlideShow_descpanel.controls[1][1] + 'px;height:' + fadeSlideShow_descpanel.controls[1][2] + 'px;cursor:pointer;cursor:hand" />')
				.appendTo(setting.$wrapperdiv);
		}
	},

	getCookie: function(Name) {
		var re = new RegExp(Name + "=[^;]+", "i"); //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			return document.cookie.match(re)[0].split("=")[1]; //return its value
		return null;
	},

	setCookie: function(name, value) {
		document.cookie = name + "=" + value + ";path=/";
	}
};