// JavaScript Document

/*
2
3 GalleryView - jQuery Content Gallery Plugin
4 Author: Jack Anderson
5 Version: 1.1 (April 5, 2009)
6 Documentation: http://www.spaceforaname.com/jquery/galleryview/
7
8 Please use this development script if you intend to make changes to the
9 plugin code. For production sites, please use jquery.galleryview-1.0.1-pack.js.
10
11*/

(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

 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':'black',
 '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':'underline',
 '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'?'none':'white'):'none')
 });
 j_pointer = $('#pointer',j_gallery);
 if(has_panels) {
 var pointerArrow = $('<img />');
 pointerArrow.attr('src',img_path+opts.nav_theme+'/pointer'+(opts.filmstrip_position=='top'?'-down':'')+'.png').appendTo($('#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+opts.nav_theme+'/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+opts.nav_theme+'/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 = s.attr('src').split('jquery.galleryview')[0]+'themes/';
 }
 });

 //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: 5000,
 overlay_opacity: 0.6,
 overlay_color: 'black',
background_color: 'black',
overlay_text_color: 'black',
caption_text_color: 'black',
 overlay_text_color: 'white',
 caption_text_color: 'white',
 border: '1px solid black',
 nav_theme: 'light',
 easing: 'swing',
 filmstrip_position: 'bottom',
 overlay_position: 'bottom',
 show_captions: false,
 fade_panels: true,
 pause_on_hover: false
 };
})(jQuery);