// http://photoswipe.com/documentation/getting-started.html var initPhotoSwipeFromDOM = function (gallerySelector) { // parse slide data (url, title, size ...) from DOM elements // (children of gallerySelector) var parseThumbnailElements = function (el) { var thumbElements = el.childNodes, numNodes = thumbElements.length, items = [], figureEl, childElements, linkEl, size, item; for (var i = 0; i < numNodes; i++) { figureEl = thumbElements[i]; //
element // include only element nodes if (figureEl.nodeType !== 1) { continue; } linkEl = figureEl.children[0]; // element size = linkEl.getAttribute('data-size').split('x'); // create slide object item = { src: linkEl.getAttribute('href'), w: parseInt(size[0], 10), h: parseInt(size[1], 10) }; if (figureEl.children.length > 1) { //
content item.title = figureEl.children[1].innerHTML; } if (linkEl.children.length > 0) { // thumbnail element, retrieving thumbnail url item.msrc = linkEl.children[0].getAttribute('src'); } item.el = figureEl; // save link to element for getThumbBoundsFn items.push(item); } return items; }; // find nearest parent element var closest = function closest(el, fn) { return el && ( fn(el) ? el : closest(el.parentNode, fn) ); }; // triggers when user clicks on thumbnail var onThumbnailsClick = function (e) { e = e || window.event; e.preventDefault ? e.preventDefault() : e.returnValue = false; var eTarget = e.target || e.srcElement; var clickedListItem = closest(eTarget, function (el) { return (el.tagName && el.tagName === 'DIV'); }); if (!clickedListItem) { return; } // find index of clicked item var clickedGallery = clickedListItem.parentNode, childNodes = clickedListItem.parentNode.childNodes, numChildNodes = childNodes.length, nodeIndex = 0, index; for (var i = 0; i < numChildNodes; i++) { if (childNodes[i].nodeType !== 1) { continue; } if (childNodes[i] === clickedListItem) { index = nodeIndex; break; } nodeIndex++; } if (index >= 0) { openPhotoSwipe(index, clickedGallery); } return false; }; // parse picture index and gallery index from URL (#&pid=1&gid=2) var photoswipeParseHash = function () { var hash = window.location.hash.substring(1), params = {}; if (hash.length < 5) { return params; } var vars = hash.split('&'); for (var i = 0; i < vars.length; i++) { if (!vars[i]) { continue; } var pair = vars[i].split('='); if (pair.length < 2) { continue; } params[pair[0]] = pair[1]; } if (params.gid) { params.gid = parseInt(params.gid, 10); } if (!params.hasOwnProperty('pid')) { return params; } params.pid = parseInt(params.pid, 10); return params; }; var openPhotoSwipe = function (index, galleryElement, disableAnimation) { var pswpElement = document.querySelectorAll('.pswp')[0], gallery, options, items; items = parseThumbnailElements(galleryElement); // define options (if needed) options = { index: index, // define gallery index (for URL) galleryUID: galleryElement.getAttribute('data-pswp-uid'), getThumbBoundsFn: function (index) { // See Options -> getThumbBoundsFn section of docs for more info var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail pageYScroll = window.pageYOffset || document.documentElement.scrollTop, rect = thumbnail.getBoundingClientRect(); return {x: rect.left, y: rect.top + pageYScroll, w: rect.width}; }, // history & focus options are disabled on CodePen // remove these lines in real life: history: false, focus: false //, // showHideOpacity:true }; if (disableAnimation) { options.showAnimationDuration = 0; } // Pass data to PhotoSwipe and initialize it gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, options); gallery.init(); }; // loop through all gallery elements and bind events var galleryElements = document.querySelectorAll(gallerySelector); for (var i = 0, l = galleryElements.length; i < l; i++) { galleryElements[i].setAttribute('data-pswp-uid', i + 1); //galleryElements[i].onclick = onThumbnailsClick; var galleryElementsImg = galleryElements[i].getElementsByTagName('img'); for (var n = 0, k = galleryElementsImg.length; n < k; n++) { galleryElementsImg[n].onclick = onThumbnailsClick; } } // Parse URL and open gallery if it contains #&pid=3&gid=1 var hashData = photoswipeParseHash(); if (hashData.pid > 0 && hashData.gid > 0) { openPhotoSwipe(hashData.pid - 1, galleryElements[hashData.gid - 1], true); } }; // execute above function initPhotoSwipeFromDOM('.ug, .ug-comments');