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+document.writeln("<!-- Root element of PhotoSwipe. Must have class pswp. -->");
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+document.writeln("<div class=\"pswp\" tabindex=\"-1\" role=\"dialog\" aria-hidden=\"true\">");
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+document.writeln("");
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+document.writeln(" <!-- Background of PhotoSwipe.");
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+document.writeln(" It\'s a separate element as animating opacity is faster than rgba(). -->");
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+document.writeln(" <div class=\"pswp__bg\"><\/div>");
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+document.writeln("");
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+document.writeln(" <!-- Slides wrapper with overflow:hidden. -->");
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+document.writeln(" <div class=\"pswp__scroll-wrap\">");
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+document.writeln("");
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+document.writeln(" <!-- Container that holds slides.");
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+document.writeln(" PhotoSwipe keeps only 3 of them in the DOM to save memory.");
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+document.writeln(" Don\'t modify these 3 pswp__item elements, data is added later on. -->");
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+document.writeln(" <div class=\"pswp__container\">");
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+document.writeln(" <div class=\"pswp__item\"><\/div>");
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+document.writeln(" <div class=\"pswp__item\"><\/div>");
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+document.writeln(" <div class=\"pswp__item\"><\/div>");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln(" <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->");
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+document.writeln(" <div class=\"pswp__ui pswp__ui--hidden\">");
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+document.writeln("");
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+document.writeln(" <div class=\"pswp__top-bar\">");
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+document.writeln("");
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+document.writeln(" <!-- Controls are self-explanatory. Order can be changed. -->");
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+document.writeln("");
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+document.writeln(" <div class=\"pswp__counter\"><\/div>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--close\" title=\"Close (Esc)\"><\/button>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--share\" title=\"Share\"><\/button>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--fs\" title=\"Toggle fullscreen\"><\/button>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--zoom\" title=\"Zoom in\/out\"><\/button>");
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+document.writeln("");
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+document.writeln(" <!-- Preloader demo http:\/\/codepen.io\/dimsemenov\/pen\/yyBWoR -->");
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+document.writeln(" <!-- element will get class pswp__preloader--active when preloader is running -->");
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+document.writeln(" <div class=\"pswp__preloader\">");
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+document.writeln(" <div class=\"pswp__preloader__icn\">");
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+document.writeln(" <div class=\"pswp__preloader__cut\">");
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+document.writeln(" <div class=\"pswp__preloader__donut\"><\/div>");
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+document.writeln(" <\/div>");
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+document.writeln(" <\/div>");
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+document.writeln(" <\/div>");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln(" <div class=\"pswp__share-modal pswp__share-modal--hidden pswp__single-tap\">");
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+document.writeln(" <div class=\"pswp__share-tooltip\"><\/div>");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--arrow--left\" title=\"Previous (arrow left)\">");
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+document.writeln(" <\/button>");
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+document.writeln("");
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+document.writeln(" <button class=\"pswp__button pswp__button--arrow--right\" title=\"Next (arrow right)\">");
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+document.writeln(" <\/button>");
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+document.writeln("");
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+document.writeln(" <div class=\"pswp__caption\">");
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+document.writeln(" <div class=\"pswp__caption__center\"><\/div>");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln(" <\/div>");
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+document.writeln("");
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+document.writeln("<\/div>");
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+
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+
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+(function() {
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+
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+ var initPhotoSwipeFromDOM = function(gallerySelector) {
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+
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+ var parseThumbnailElements = function(el) {
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+ var thumbElements = el.childNodes,
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+ numNodes = thumbElements.length,
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+ items = [],
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+ el,
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+ childElements,
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+ thumbnailEl,
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+ size,
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+ item;
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+
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+ for(var i = 0; i < numNodes; i++) {
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+ el = thumbElements[i];
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+
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+ // include only element nodes
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+ if(el.nodeType !== 1) {
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+ continue;
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+ }
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+
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+ childElements = el.children;
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+
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+ size = el.getAttribute('data-size').split('x');
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+
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+ // create slide object
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+ item = {
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+ src: el.getAttribute('href'),
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+ w: parseInt(size[0], 10),
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+ h: parseInt(size[1], 10),
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+ author: el.getAttribute('data-author')
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+ };
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+
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+ item.el = el; // save link to element for getThumbBoundsFn
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+
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+ if(childElements.length > 0) {
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+ item.msrc = childElements[0].getAttribute('src'); // thumbnail url
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+ if(childElements.length > 1) {
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+ item.title = childElements[1].innerHTML; // caption (contents of figure)
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+ }
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+ }
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+
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+
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+ var mediumSrc = el.getAttribute('data-med');
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+ if(mediumSrc) {
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+ size = el.getAttribute('data-med-size').split('x');
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+ // "medium-sized" image
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+ item.m = {
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+ src: mediumSrc,
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+ w: parseInt(size[0], 10),
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+ h: parseInt(size[1], 10)
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+ };
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+ }
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+ // original image
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+ item.o = {
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+ src: item.src,
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+ w: item.w,
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+ h: item.h
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+ };
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+
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+ items.push(item);
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+ }
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+
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+ return items;
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+ };
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+
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+ // find nearest parent element
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+ var closest = function closest(el, fn) {
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+ return el && ( fn(el) ? el : closest(el.parentNode, fn) );
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+ };
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+
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+ var onThumbnailsClick = function(e) {
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+ e = e || window.event;
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+ e.preventDefault ? e.preventDefault() : e.returnValue = false;
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+
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+ var eTarget = e.target || e.srcElement;
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+
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+ var clickedListItem = closest(eTarget, function(el) {
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+ return el.tagName === 'A';
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+ });
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+
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+ if(!clickedListItem) {
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+ return;
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+ }
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+
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+ var clickedGallery = clickedListItem.parentNode;
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+
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+ var childNodes = clickedListItem.parentNode.childNodes,
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+ numChildNodes = childNodes.length,
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+ nodeIndex = 0,
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+ index;
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+
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+ for (var i = 0; i < numChildNodes; i++) {
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+ if(childNodes[i].nodeType !== 1) {
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+ continue;
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+ }
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+
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+ if(childNodes[i] === clickedListItem) {
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+ index = nodeIndex;
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+ break;
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+ }
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+ nodeIndex++;
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+ }
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+
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+ if(index >= 0) {
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+ openPhotoSwipe( index, clickedGallery );
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+ }
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+ return false;
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+ };
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+
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+ var photoswipeParseHash = function() {
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+ var hash = window.location.hash.substring(1),
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+ params = {};
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+
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+ if(hash.length < 5) { // pid=1
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+ return params;
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+ }
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+
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+ var vars = hash.split('&');
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+ for (var i = 0; i < vars.length; i++) {
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+ if(!vars[i]) {
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+ continue;
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+ }
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+ var pair = vars[i].split('=');
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+ if(pair.length < 2) {
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+ continue;
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+ }
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+ params[pair[0]] = pair[1];
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+ }
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+
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+ if(params.gid) {
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+ params.gid = parseInt(params.gid, 10);
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+ }
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+
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+ return params;
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+ };
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+
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+ var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
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+ var pswpElement = document.querySelectorAll('.pswp')[0],
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+ gallery,
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+ options,
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+ items;
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+
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+ items = parseThumbnailElements(galleryElement);
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+
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+ // define options (if needed)
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+ options = {
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+
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+ galleryUID: galleryElement.getAttribute('data-pswp-uid'),
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+
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+ getThumbBoundsFn: function(index) {
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+ // See Options->getThumbBoundsFn section of docs for more info
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+ var thumbnail = items[index].el.children[0],
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+ pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
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+ rect = thumbnail.getBoundingClientRect();
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+
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+ return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
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+ },
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+
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+ addCaptionHTMLFn: function(item, captionEl, isFake) {
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+ if(!item.title) {
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+ captionEl.children[0].innerText = '';
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+ return false;
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+ }
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+ captionEl.children[0].innerHTML = item.title + '<br/><small>Photo: ' + item.author + '</small>';
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+ return true;
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+ }
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+
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+ };
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+
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+ // options for control bar
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+ options.shareEl = false;
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+ options.fullscreenEl = false;
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+
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+ if(fromURL) {
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+ if(options.galleryPIDs) {
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+ // parse real index when custom PIDs are used
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+ // http://photoswipe.com/documentation/faq.html#custom-pid-in-url
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+ for(var j = 0; j < items.length; j++) {
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+ if(items[j].pid == index) {
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+ options.index = j;
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+ break;
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+ }
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+ }
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+ } else {
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+ options.index = parseInt(index, 10) - 1;
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+ }
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+ } else {
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+ options.index = parseInt(index, 10);
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+ }
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+
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+ // exit if index not found
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+ if( isNaN(options.index) ) {
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+ return;
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+ }
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+
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+
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+
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+ // Pass data to PhotoSwipe and initialize it
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+ gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
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+
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+ // see: http://photoswipe.com/documentation/responsive-images.html
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+ var realViewportWidth,
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+ useLargeImages = false,
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+ firstResize = true,
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+ imageSrcWillChange;
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+
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+ gallery.listen('beforeResize', function() {
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+
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+ var dpiRatio = window.devicePixelRatio ? window.devicePixelRatio : 1;
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+ dpiRatio = Math.min(dpiRatio, 2.5);
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+ realViewportWidth = gallery.viewportSize.x * dpiRatio;
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+
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+
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+ if(realViewportWidth >= 1200 || (!gallery.likelyTouchDevice && realViewportWidth > 800) || screen.width > 1200 ) {
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+ if(!useLargeImages) {
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+ useLargeImages = true;
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+ imageSrcWillChange = true;
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+ }
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+
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+ } else {
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+ if(useLargeImages) {
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+ useLargeImages = false;
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+ imageSrcWillChange = true;
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+ }
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+ }
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+
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+ if(imageSrcWillChange && !firstResize) {
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+ gallery.invalidateCurrItems();
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+ }
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+
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+ if(firstResize) {
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+ firstResize = false;
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+ }
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+
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+ imageSrcWillChange = false;
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+
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+ });
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+
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+ gallery.listen('gettingData', function(index, item) {
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+ if( useLargeImages ) {
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+ item.src = item.o.src;
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+ item.w = item.o.w;
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+ item.h = item.o.h;
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+ } else {
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+ item.src = item.m.src;
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+ item.w = item.m.w;
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+ item.h = item.m.h;
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+ }
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+ });
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+
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+ gallery.init();
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+ };
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+
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+ // select all gallery elements
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+ var galleryElements = document.querySelectorAll( gallerySelector );
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+ for(var i = 0, l = galleryElements.length; i < l; i++) {
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+ galleryElements[i].setAttribute('data-pswp-uid', i+1);
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+ galleryElements[i].onclick = onThumbnailsClick;
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+ }
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+
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+ // Parse URL and open gallery if it contains #&pid=3&gid=1
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+ var hashData = photoswipeParseHash();
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+ if(hashData.pid && hashData.gid) {
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+ openPhotoSwipe( hashData.pid, galleryElements[ hashData.gid - 1 ], true, true );
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+ }
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+ };
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+
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+ initPhotoSwipeFromDOM('.demo-gallery');
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+
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+ })();
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