https://neaca.org/media/com_phocagallery/js/photoswipe/js/photoswipe-initialize-ratio.js?6d8764

1var initPhotoSwipeFromDOM = function(gallerySelector) {
2
3    // parse slide data (url, title, size ...) from DOM elements
4    // (children of gallerySelector)
5    var parseThumbnailElements = function(el) {
6       /* NOT DIRECT PARENT var thumbElements = el.childNodes,*/
7	   var thumbElements = jQuery(el).find('figure'),
8            numNodes = thumbElements.length,
9            items = [],
10            figureEl,
11            linkEl,
12            size,
13            item;
14
15        for(var i = 0; i < numNodes; i++) {
16
17            figureEl = thumbElements[i]; // <figure> element
18
19            // include only element nodes
20            if(figureEl.nodeType !== 1) {
21                continue;
22            }
23
24            linkEl = figureEl.children[0]; // <a> element
25
26
27            size = linkEl.getAttribute('data-size').split('x');
28
29            // create slide object
30          /*  item = {
31                src: linkEl.getAttribute('href'),
32                w: parseInt(size[0], 10),
33                h: parseInt(size[1], 10)
34            };*/
35
36			// create slide object
37			if (jQuery(linkEl).data('type') == 'video') {
38				item = {
39					html: jQuery(linkEl).data('video')
40				};
41			} else {
42				item = {
43					src: linkEl.getAttribute('href'),
44					w: parseInt(size[0], 10),
45					h: parseInt(size[1], 10)
46				};
47			}
48
49
50
51            if(figureEl.children.length > 1) {
52                // <figcaption> content
53                item.title = figureEl.children[1].innerHTML;
54            }
55
56            if(linkEl.children.length > 0) {
57                // <img> thumbnail element, retrieving thumbnail url
58              //  item.msrc = linkEl.children[0].getAttribute('src');
59            }
60
61            item.el = figureEl; // save link to element for getThumbBoundsFn
62            items.push(item);
63        }
64
65        return items;
66    };
67
68    // find nearest parent element
69    var closest = function closest(el, fn) {
70        return el && ( fn(el) ? el : closest(el.parentNode, fn) );
71    };
72
73    // triggers when user clicks on thumbnail
74    //var onThumbnailsClick = function(e) {
75		var onThumbnailsClick = jQuery('.pg-photoswipe-button').on('click', function(e) {
76        e = e || window.event;
77        e.preventDefault ? e.preventDefault() : e.returnValue = false;
78
79        var eTarget = e.target || e.srcElement;
80
81        // find root element of slide
82        var clickedListItem = closest(eTarget, function(el) {
83            return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
84        });
85
86        if(!clickedListItem) {
87            return;
88        }
89
90        // find index of clicked item by looping through all child nodes
91        // alternatively, you may define index via data- attribute
92       /* NOT DIRECT PARENT var clickedGallery = clickedListItem.parentNode,*/
93		//var clickedGallery = clickedListItem.parentNode.parentNode.parentNode.parentNode.parentNode,
94		var clickedGalleryObject = jQuery(clickedListItem).closest('div.pg-photoswipe'),
95            clickedGallery = clickedGalleryObject[0],
96			/* NOT DIRECT PARENT childNodes = clickedListItem.parentNode.childNodes,*/
97			childNodes = jQuery(clickedGallery).find('figure'),
98            numChildNodes = childNodes.length,
99            nodeIndex = 0,
100            index;
101
102
103        for (var i = 0; i < numChildNodes; i++) {
104
105            if(childNodes[i].nodeType !== 1) {
106                continue;
107            }
108
109            if(childNodes[i] === clickedListItem) {
110                index = nodeIndex;
111                break;
112            }
113            nodeIndex++;
114        }
115
116
117
118        if(index >= 0) {
119
120            // open PhotoSwipe if valid index found
121            openPhotoSwipe( index, clickedGallery );
122        }
123        return false;
124    });
125
126    // parse picture index and gallery index from URL (#&pid=1&gid=2)
127    var photoswipeParseHash = function() {
128        var hash = window.location.hash.substring(1),
129        params = {};
130
131        if(hash.length < 5) {
132            return params;
133        }
134
135        var vars = hash.split('&');
136        for (var i = 0; i < vars.length; i++) {
137            if(!vars[i]) {
138                continue;
139            }
140            var pair = vars[i].split('=');
141            if(pair.length < 2) {
142                continue;
143            }
144            params[pair[0]] = pair[1];
145        }
146
147        if(params.gid) {
148            params.gid = parseInt(params.gid, 10);
149        }
150
151        return params;
152    };
153
154    var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
155        var pswpElement = document.querySelectorAll('.pswp')[0],
156            gallery,
157            options,
158            items;
159
160        items = parseThumbnailElements(galleryElement);
161
162        // define options (if needed)
163       /* options = {
164
165            // define gallery index (for URL)
166            galleryUID: galleryElement.getAttribute('data-pswp-uid'),
167
168            getThumbBoundsFn: function(index) {
169                // See Options -> getThumbBoundsFn section of documentation for more info
170                var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
171                    pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
172                    rect = thumbnail.getBoundingClientRect();
173
174                return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
175            }
176
177        };*/
178
179		options = {
180
181            // define gallery index (for URL)
182            galleryUID: galleryElement.getAttribute('data-pswp-uid'),
183
184            getThumbBoundsFn: function(index) {
185                // See Options -> getThumbBoundsFn section of documentation for more info
186                var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
187                    pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
188                    rect = thumbnail.getBoundingClientRect();
189
190                return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
191            },
192			showHideOpacity: true,
193			getThumbBoundsFn: false
194
195        };
196
197        // PhotoSwipe opened from URL
198        if(fromURL) {
199            if(options.galleryPIDs) {
200                // parse real index when custom PIDs are used
201                // http://photoswipe.com/documentation/faq.html#custom-pid-in-url
202                for(var j = 0; j < items.length; j++) {
203                    if(items[j].pid == index) {
204                        options.index = j;
205                        break;
206                    }
207                }
208            } else {
209                // in URL indexes start from 1
210                options.index = parseInt(index, 10) - 1;
211            }
212        } else {
213            options.index = parseInt(index, 10);
214        }
215
216        // exit if index not found
217        if( isNaN(options.index) ) {
218            return;
219        }
220
221        if(disableAnimation) {
222            options.showAnimationDuration = 0;
223        }
224
225        // Pass data to PhotoSwipe and initialize it
226        gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
227
228
229		/* SLIDESHOW */
230		setSlideshowState(ssButtonClass, true /* not running from the start */);
231
232		// start timer for the next slide in slideshow after prior image has loaded
233		gallery.listen('afterChange', function() {
234			if (ssRunning && ssOnce) {
235				ssOnce = false;

236				setTimeout(gotoNextSlide, ssDelay);
237			}
238		});
239		gallery.listen('destroy', function() { gallery = null; });
240		/* END SLIDESHOW */
241
242        gallery.init();
243
244		/* YouTube */
245		gallery.listen('beforeChange', function() {
246			var currItem = jQuery(gallery.currItem.container);
247			jQuery('.ph-pswp-video-wrapper iframe').removeClass('active');
248			var currItemIframe = currItem.find('.ph-pswp-video-wrapper iframe').addClass('active');
249			jQuery('.ph-pswp-video-wrapper iframe').each(function() {
250				if (!jQuery(this).hasClass('active')) {
251					jQuery(this).attr('src', jQuery(this).attr('src'));
252				}
253			});
254		});
255
256
257
258        gallery.listen('close', function() {
259            gallery.close();
260            history.pushState("", document.title, window.location.pathname);
261			jQuery('.ph-pswp-video-wrapper iframe').each(function() {
262				jQuery(this).attr('src', jQuery(this).attr('src'));
263			});
264		});
265
266
267		/* SLIDESHOW FUNCTIONS */
268
269		// slideshow vars:
270		var ssRunning = false,
271			ssOnce = false,
272			ssDelay = 2500 /*ms*/,
273			ssButtonClass = '.pswp__button--playpause';
274
275		/* slideshow management */
276		jQuery(ssButtonClass).on('click touchstart', function(e) {
277			// toggle slideshow on/off
278			setSlideshowState(this, !ssRunning);
279			//gallery.next();
280		});
281
282
283
284		function setSlideshowState(el, running) {
285
286			if (running) {
287				setTimeout(gotoNextSlide, ssDelay / 2.0 /* first time wait less */);
288			}
289			var title = running ? jQuery('#phTxtPauseSlideshow').text() : jQuery('#phTxtPlaySlideshow').text();
290			jQuery(el).removeClass(running ? "play" : "pause") // change icons defined in css
291				.addClass(running ? "pause" : "play")
292				.prop('title', title);
293			ssRunning = running;
294		}
295
296		function gotoNextSlide() {
297			if (ssRunning && !!gallery) {
298				ssOnce = true;
299				gallery.next();
300				// start counter for next slide in 'afterChange' listener
301			}
302		}
303
304		/* override handling of Esc key to stop slideshow on first esc (note Esc to leave fullscreen never gets here) */
305		jQuery(document).keydown(function(e) {
306			if (e.altKey || e.ctrlKey || e.shiftKey || e.metaKey) return;
307			if ((e.key === "Escape" || e.which == 27 /*esc*/) && !!gallery) {
308				if (e.preventDefault)  e.preventDefault();
309				else  e.returnValue = false;
310				if (ssRunning) {
311					setSlideshowState(ssButtonClass, false);
312				} else {
313					gallery.close();
314				}
315			}
316		});
317
318
319		/* END SLIDESHOW FUNCTIONS */
320
321        /* END SLIDESHOW FUNCTIONS */
322        gallery.listen('close', function() {
323            // Second attempt to close gallery
324            gallery.close();
325            // Remove history in case it will be not removed by close
326            history.pushState("", document.title, window.location.pathname);
327            // Forse stopping of slideshow
328            setSlideshowState(ssButtonClass, false);
329        });
330
331    };
332
333    // loop through all gallery elements and bind events
334    var galleryElements = document.querySelectorAll( gallerySelector );
335
336    for(var i = 0, l = galleryElements.length; i < l; i++) {
337        galleryElements[i].setAttribute('data-pswp-uid', i+1);
338        galleryElements[i].onclick = onThumbnailsClick;
339    }
340
341    // Parse URL and open gallery if it contains #&pid=3&gid=1
342    var hashData = photoswipeParseHash();
343    if(hashData.pid && hashData.gid) {
344        openPhotoSwipe( hashData.pid ,  galleryElements[ hashData.gid - 1 ], true, true );
345    }
346};
347
348// execute above function
349initPhotoSwipeFromDOM('.pg-photoswipe');