/*


GalleryView - jQuery Content Gallery Plugin
Author: 		Jack Anderson
Version:		1.1 (April 5, 2009)
Documentation: 	http://www.spaceforaname.com/jquery/galleryview/

Please use this development script if you intend to make changes to the
plugin code.  For production sites, please use jquery.galleryview-1.0.1-pack.js.


*/

(function($){
$.fn.galleryView = function(options) {
	var opts = $.extend($.fn.galleryView.defaults,options);
	
	var id;
	var iterator = 0;
	var gallery_width;
	var gallery_height;
	var frame_margin = 10;
	var strip_width;
	var wrapper_width;
	var item_count = 0;
	var slide_method;
	var img_path;
	var paused = false;
	var frame_caption_size = 20;
	var frame_margin_top = 5;
	var pointer_width = 2;
	
	//Define jQuery objects for reuse
	var j_gallery;
	var j_filmstrip;
	var j_frames;
	var j_panels;
	var j_pointer;
	

/************************************************/

/*	Plugin Methods								*/

/************************************************/	
	function showItem(i) {
		//Disable next/prev buttons until transition is complete
		$('img.nav-next').unbind('click');
		$('img.nav-prev').unbind('click');
		j_frames.unbind('click');
		if(has_panels) {
			if(opts.fade_panels) {
				//Fade out all panels and fade in target panel
				j_panels.fadeOut(opts.transition_speed).eq(i%item_count).fadeIn(opts.transition_speed,function(){
					if(!has_filmstrip) {
						$('img.nav-prev').click(showPrevItem);
						$('img.nav-next').click(showNextItem);		
					}
				});
			} 
		}
		
		if(has_filmstrip) {
			//Slide either pointer or filmstrip, depending on transition method
			if(slide_method=='strip') {
				//Stop filmstrip if it's currently in motion
				j_filmstrip.stop();
				
				//Determine distance between pointer (eventual destination) and target frame
				var distance = getPos(j_frames[i]).left - (getPos(j_pointer[0]).left+2);
				var leftstr = (distance>=0?'-=':'+=')+Math.abs(distance)+'px';
				
				//Animate filmstrip and slide target frame under pointer
				//If target frame is a duplicate, jump back to 'original' frame
				j_filmstrip.animate({
					'left':leftstr
				},opts.transition_speed,opts.easing,function(){
					//Always ensure that there are a sufficient number of hidden frames on either
					//side of the filmstrip to avoid empty frames
					if(i>item_count) {
						i = i%item_count;
						iterator = i;
						j_filmstrip.css('left','-'+((opts.frame_width+frame_margin)*i)+'px');
					} else if (i<=(item_count-strip_size)) {
						i = (i%item_count)+item_count;
						iterator = i;
						j_filmstrip.css('left','-'+((opts.frame_width+frame_margin)*i)+'px');
					}
					
					if(!opts.fade_panels) {
						j_panels.hide().eq(i%item_count).show();
					}
					$('img.nav-prev').click(showPrevItem);
					$('img.nav-next').click(showNextItem);
					enableFrameClicking();
				});
			} else if(slide_method=='pointer') {
				//Stop pointer if it's currently in motion
				j_pointer.stop();
				//Get position of target frame
				var pos = getPos(j_frames[i]);
				//Slide the pointer over the target frame
				j_pointer.animate({
					'left':(pos.left-2+'px')
				},opts.transition_speed,opts.easing,function(){	
					if(!opts.fade_panels) {
						j_panels.hide().eq(i%item_count).show();
					}	
					$('img.nav-prev').click(showPrevItem);
					$('img.nav-next').click(showNextItem);
					enableFrameClicking();
				});
			}
		
			if($('a',j_frames[i])[0]) {
				j_pointer.unbind('click').click(function(){
					var a = $('a',j_frames[i]).eq(0);
					if(a.attr('target')=='_blank') {window.open(a.attr('href'));}
					else {location.href = a.attr('href');}
				});
			}
		}
	};
	function showNextItem() {
		$(document).stopTime("transition");
		if(++iterator==j_frames.length) {iterator=0;}
		showItem(iterator);
		$(document).everyTime(opts.transition_interval,"transition",function(){
			showNextItem();
		});
	};
	function showPrevItem() {
		$(document).stopTime("transition");
		if(--iterator<0) {iterator = item_count-1;}
		//alert(iterator);
		showItem(iterator);
		$(document).everyTime(opts.transition_interval,"transition",function(){
			showNextItem();
		});
	};
	function getPos(el) {
		var left = 0, top = 0;
		var el_id = el.id;
		if(el.offsetParent) {
			do {
				left += el.offsetLeft;
				top += el.offsetTop;
			} while(el = el.offsetParent);
		}
		//If we want the position of the gallery itself, return it
		if(el_id == id) {return {'left':left,'top':top};}
		//Otherwise, get position of element relative to gallery
		else {
			var gPos = getPos(j_gallery[0]);
			var gLeft = gPos.left;
			var gTop = gPos.top;
			
			return {'left':left-gLeft,'top':top-gTop};
		}
	};
	function enableFrameClicking() {
		j_frames.each(function(i){
			//If there isn't a link in this frame, set up frame to slide on click
			//Frames with links will handle themselves
			if($('a',this).length==0) {
				$(this).click(function(){
					$(document).stopTime("transition");
					showItem(i);
					iterator = i;
					$(document).everyTime(opts.transition_interval,"transition",function(){
						showNextItem();
					});
				});
			}
		});
	};
	
	function buildPanels() {
		//If there are panel captions, add overlay divs
		if($('.panel-overlay').length>0) {j_panels.append('<div class="overlay"></div>');}
		
		if(!has_filmstrip) {
			//Add navigation buttons
			$('<img />').addClass('nav-next').attr('src',img_path+'/next.png').appendTo(j_gallery).css({
				'position':'absolute',
				'zIndex':'1100',
				'cursor':'pointer',
				'top':((opts.panel_height-22)/2)+'px',
				'right':'10px',
				'display':'none'
			}).click(showNextItem);
			$('<img />').addClass('nav-prev').attr('src',img_path+'/prev.png').appendTo(j_gallery).css({
				'position':'absolute',
				'zIndex':'1100',
				'cursor':'pointer',
				'top':((opts.panel_height-22)/2)+'px',
				'left':'10px',
				'display':'none'
			}).click(showPrevItem);
			
			$('<img />').addClass('nav-overlay').attr('src',img_path+'/panel-nav-next.png').appendTo(j_gallery).css({
				'position':'absolute',
				'zIndex':'1099',
				'top':((opts.panel_height-22)/2)-10+'px',
				'right':'0',
				'display':'none'
			});
			
			$('<img />').addClass('nav-overlay').attr('src',img_path+'/panel-nav-prev.png').appendTo(j_gallery).css({
				'position':'absolute',
				'zIndex':'1099',
				'top':((opts.panel_height-22)/2)-10+'px',
				'left':'0',
				'display':'none'
			});
		}
		j_panels.css({
			'width':(opts.panel_width-parseInt(j_panels.css('paddingLeft').split('px')[0],10)-parseInt(j_panels.css('paddingRight').split('px')[0],10))+'px',
			'height':(opts.panel_height-parseInt(j_panels.css('paddingTop').split('px')[0],10)-parseInt(j_panels.css('paddingBottom').split('px')[0],10))+'px',
			'position':'absolute',
			'top':(opts.filmstrip_position=='top'?(opts.frame_height+frame_margin_top+(opts.show_captions?frame_caption_size:frame_margin_top))+'px':'0px'),
			'left':'0px',
			'overflow':'hidden',
			'background':'white',
			'display':'none'
		});
		$('.panel-overlay',j_panels).css({
			'position':'absolute',
			'zIndex':'999',
			'width':(opts.panel_width-20)+'px',
			'height':opts.overlay_height+'px',
			'top':(opts.overlay_position=='top'?'0':opts.panel_height-opts.overlay_height+'px'),
			'left':'0',
			'padding':'0 10px',
			'color':opts.overlay_text_color,
			'fontSize':opts.overlay_font_size
		});
		$('.panel-overlay a',j_panels).css({
			'color':opts.overlay_text_color,
			'textDecoration':'none',
			'fontWeight':'bold'
		});
		$('.overlay',j_panels).css({
			'position':'absolute',
			'zIndex':'998',
			'width':opts.panel_width+'px',
			'height':opts.overlay_height+'px',
			'top':(opts.overlay_position=='top'?'0':opts.panel_height-opts.overlay_height+'px'),
			'left':'0',
			'background':opts.overlay_color,
			'opacity':opts.overlay_opacity
		});
		$('.panel iframe',j_panels).css({
			'width':opts.panel_width+'px',
			'height':(opts.panel_height-opts.overlay_height)+'px',
			'border':'0'
		});
	};
	
	function buildFilmstrip() {
		//Add wrapper to filmstrip to hide extra frames
		j_filmstrip.wrap('<div class="strip_wrapper"></div>');
		if(slide_method=='strip') {
			j_frames.clone().appendTo(j_filmstrip);
			j_frames.clone().appendTo(j_filmstrip);
			j_frames = $('li',j_filmstrip);
		}
		//If captions are enabled, add caption divs and fill with the image titles
		if(opts.show_captions) {
			j_frames.append('<div class="caption"></div>').each(function(i){
				$(this).find('.caption').html($(this).find('img').attr('title'));			   
			});
		}
		
		j_filmstrip.css({
			'listStyle':'none',
			'margin':'0',
			'padding':'0',
			'width':strip_width+'px',
			'position':'absolute',
			'zIndex':'900',
			'top':'0',
			'left':'0',
			'height':(opts.frame_height+10)+'px',
			'background':opts.background_color
		});
		j_frames.css({
			'float':'left',
			'position':'relative',
			'height':opts.frame_height+'px',
			'zIndex':'901',
			'marginTop':frame_margin_top+'px',
			'marginBottom':'0px',
			'marginRight':frame_margin+'px',
			'padding':'0',
			'cursor':'pointer'
		});
		$('img',j_frames).css({
			'border':'none'
		});
		$('.strip_wrapper',j_gallery).css({
			'position':'absolute',
			'top':(opts.filmstrip_position=='top'?'0px':opts.panel_height+'px'),
			'left':((gallery_width-wrapper_width)/2)+'px',
			'width':wrapper_width+'px',
			'height':(opts.frame_height+frame_margin_top+(opts.show_captions?frame_caption_size:frame_margin_top))+'px',
			'overflow':'hidden'
		});
		$('.caption',j_gallery).css({
			'position':'absolute',
			'top':opts.frame_height+'px',
			'left':'0',
			'margin':'0',
			'width':opts.frame_width+'px',
			'padding':'0',
			'color':opts.caption_text_color,
			'textAlign':'center',
			'fontSize':'10px',
			'height':frame_caption_size+'px',
			
			'lineHeight':frame_caption_size+'px'
		});
		var pointer = $('<div></div>');
		pointer.attr('id','pointer').appendTo(j_gallery).css({
			 'position':'absolute',
			 'zIndex':'1000',
			 'cursor':'pointer',
			 'top':getPos(j_frames[0]).top-(pointer_width/2)+'px',
			 'left':getPos(j_frames[0]).left-(pointer_width/2)+'px',
			 'height':opts.frame_height-pointer_width+'px',
			 'width':opts.frame_width-pointer_width+'px',
			 'border':(has_panels?pointer_width+'px solid '+(opts.nav_theme=='dark'?'black':'white'):'none')
		});
		j_pointer = $('#pointer',j_gallery);
		if(has_panels) {
			var pointerArrow = $('<img />');
			pointerArrow.attr('src',img_path+'/pointer'+(opts.filmstrip_position=='top'?'-down':'')+'.png').appendTo($('#pointer')).css({
				'position':'absolute',
				'zIndex':'1001',
				'top':(opts.filmstrip_position=='bottom'?'-'+(10+pointer_width)+'px':opts.frame_height+'px'),
				'left':((opts.frame_width/2)-10)+'px'
			});
		}
		
		//If the filmstrip is animating, move the strip to the middle third
		if(slide_method=='strip') {
			j_filmstrip.css('left','-'+((opts.frame_width+frame_margin)*item_count)+'px');
			iterator = item_count;
		}
		//If there's a link under the pointer, enable clicking on the pointer
		if($('a',j_frames[iterator])[0]) {
			j_pointer.click(function(){
				var a = $('a',j_frames[iterator]).eq(0);
				if(a.attr('target')=='_blank') {window.open(a.attr('href'));}
				else {location.href = a.attr('href');}
			});
		}
		
		//Add navigation buttons
		$('<img />').addClass('nav-next').attr('src',img_path+'/next.png').appendTo(j_gallery).css({
			'position':'absolute',
			'cursor':'pointer',
			'top':(opts.filmstrip_position=='top'?0:opts.panel_height)+frame_margin_top+((opts.frame_height-22)/2)+'px',
			'right':(gallery_width/2)-(wrapper_width/2)-10-22+'px'
		}).click(showNextItem);
		$('<img />').addClass('nav-prev').attr('src',img_path+'/prev.png').appendTo(j_gallery).css({
			'position':'absolute',
			'cursor':'pointer',
			'top':(opts.filmstrip_position=='top'?0:opts.panel_height)+frame_margin_top+((opts.frame_height-22)/2)+'px',
			'left':(gallery_width/2)-(wrapper_width/2)-10-22+'px'
		}).click(showPrevItem);
	};
	
	//Check mouse to see if it is within the borders of the panel
	//More reliable than 'mouseover' event when elements overlay the panel
	function mouseIsOverPanels(x,y) {		
		var pos = getPos(j_gallery[0]);
		var top = pos.top;
		var left = pos.left;
		return x > left && x < left+opts.panel_width && y > top && y < top+opts.panel_height;				
	};
	

/************************************************/

/*	Main Plugin Code							*/

/************************************************/
	return this.each(function() {
		j_gallery = $(this);
		//Determine path between current page and filmstrip images
		//Scan script tags and look for path to GalleryView plugin
		$('script').each(function(i){
			var s = $(this);
			if(s.attr('src') && s.attr('src').match(/jquery\.galleryview/)){
				img_path ='http://www.zdressup.net/template/images';	
			}
		});
		
		//Hide gallery to prevent Flash of Unstyled Content (FoUC) in IE
		j_gallery.css('visibility','hidden');
		
		//Assign elements to variables for reuse
		j_filmstrip = $('.filmstrip',j_gallery);
		j_frames = $('li',j_filmstrip);
		j_panels = $('.panel',j_gallery);
		
		id = j_gallery.attr('id');
		
		has_panels = j_panels.length > 0;
		has_filmstrip = j_frames.length > 0;
		
		if(!has_panels) opts.panel_height = 0;
		
		//Number of frames in filmstrip
		item_count = has_panels?j_panels.length:j_frames.length;
		
		//Number of frames that can display within the screen's width
		//64 = width of block for navigation button * 2
		//5 = minimum frame margin
		strip_size = has_panels?Math.floor((opts.panel_width-64)/(opts.frame_width+frame_margin)):Math.min(item_count,opts.filmstrip_size); 
		
		
		/************************************************/
		/*	Determine transition method for filmstrip	*/
		/************************************************/
				//If more items than strip size, slide filmstrip
				//Otherwise, slide pointer
				if(strip_size >= item_count) {
					slide_method = 'pointer';
					strip_size = item_count;
				}
				else {slide_method = 'strip';}
		
		/************************************************/
		/*	Determine dimensions of various elements	*/
		/************************************************/
				
				//Width of gallery block
				gallery_width = has_panels?opts.panel_width:(strip_size*(opts.frame_width+frame_margin))-frame_margin+64;
				
				//Height of gallery block = screen + filmstrip + captions (optional)
				gallery_height = (has_panels?opts.panel_height:0)+(has_filmstrip?opts.frame_height+frame_margin_top+(opts.show_captions?frame_caption_size:frame_margin_top):0);
				
				//Width of filmstrip
				if(slide_method == 'pointer') {strip_width = (opts.frame_width*item_count)+(frame_margin*(item_count));}
				else {strip_width = (opts.frame_width*item_count*3)+(frame_margin*(item_count*3));}
				
				//Width of filmstrip wrapper (to hide overflow)
				wrapper_width = ((strip_size*opts.frame_width)+((strip_size-1)*frame_margin));
		
		/************************************************/
		/*	Apply CSS Styles							*/
		/************************************************/
				j_gallery.css({
					'position':'relative',
					'margin':'0',
					'background':opts.background_color,
					'border':opts.border,
					'width':gallery_width+'px',
					'height':gallery_height+'px'
				});
		
		/************************************************/
		/*	Build filmstrip and/or panels				*/
		/************************************************/
				if(has_filmstrip) {
					buildFilmstrip();
				}
				if(has_panels) {
					buildPanels();
				}


		
		/************************************************/
		/*	Add events to various elements				*/
		/************************************************/
				if(has_filmstrip) enableFrameClicking();
				
					
					
					$().mousemove(function(e){							
						if(mouseIsOverPanels(e.pageX,e.pageY)) {
							if(opts.pause_on_hover) {
								$(document).oneTime(500,"animation_pause",function(){
									$(document).stopTime("transition");
									paused=true;
								});
							}
							if(has_panels && !has_filmstrip) {
								$('.nav-overlay').fadeIn('fast');
								$('.nav-next').fadeIn('fast');
								$('.nav-prev').fadeIn('fast');
							}
						} else {
							if(opts.pause_on_hover) {
								$(document).stopTime("animation_pause");
								if(paused) {
									$(document).everyTime(opts.transition_interval,"transition",function(){
										showNextItem();
									});
									paused = false;
								}
							}
							if(has_panels && !has_filmstrip) {
								$('.nav-overlay').fadeOut('fast');
								$('.nav-next').fadeOut('fast');
								$('.nav-prev').fadeOut('fast');
							}
						}
					});
		
		
		/************************************************/
		/*	Initiate Automated Animation				*/
		/************************************************/
				//Show the first panel
				j_panels.eq(0).show();


				//If we have more than one item, begin automated transitions
				if(item_count > 1) {
					$(document).everyTime(opts.transition_interval,"transition",function(){
						showNextItem();
					});
				}
				
				//Make gallery visible now that work is complete
				j_gallery.css('visibility','visible');
	});
};

$.fn.galleryView.defaults = {
	panel_width: 400,
	panel_height: 300,
	frame_width: 80,
	frame_height: 80,
	filmstrip_size: 3,
	overlay_height: 70,
	overlay_font_size: '1em',
	transition_speed: 400,
	transition_interval: 6000,
	overlay_opacity: 0.4,
	overlay_color: '#6fa907',
	background_color: '#6fa907',
	overlay_text_color: 'white',
	caption_text_color: 'white',
	border: '0px solid black',
	nav_theme: 'light',
	easing: 'swing',
	filmstrip_position: 'bottom',
	overlay_position: 'bottom',
	show_captions: false,
	fade_panels: true,
	pause_on_hover: false
};

})(jQuery);