https://peakclimbingclub.co.uk/site/templates/scripts/main.js

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