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var initPhotoSwipeFromDOM = function(gallerySelector) {
// parse slide data (url, title, size ...) from DOM elements
// (children of gallerySelector)
var parseThumbnailElements = function(el) {
/* NOT DIRECT PARENT var thumbElements = el.childNodes,*/
var thumbElements = jQuery(el).find('figure'),
numNodes = thumbElements.length,
items = [],
figureEl,
linkEl,
size,
item;
for(var i = 0; i < numNodes; i++) {
figureEl = thumbElements[i]; // <figure> element
// include only element nodes
if(figureEl.nodeType !== 1) {
continue;
}
linkEl = figureEl.children[0]; // <a> 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)
};*/
// create slide object
if (jQuery(linkEl).data('type') == 'video') {
item = {
html: jQuery(linkEl).data('video')
};
} else {
item = {
src: linkEl.getAttribute('href'),
w: parseInt(size[0], 10),
h: parseInt(size[1], 10)
};
}
if(figureEl.children.length > 1) {
// <figcaption> content
item.title = figureEl.children[1].innerHTML;
}
if(linkEl.children.length > 0) {
// <img> 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) {
var onThumbnailsClick = jQuery('.photoswipe-button').on('click', function(e) {
e = e || window.event;
e.preventDefault ? e.preventDefault() : e.returnValue = false;
var eTarget = e.target || e.srcElement;
// find root element of slide
var clickedListItem = closest(eTarget, function(el) {
return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
});
if(!clickedListItem) {
return;
}
// find index of clicked item by looping through all child nodes
// alternatively, you may define index via data- attribute
/* NOT DIRECT PARENT var clickedGallery = clickedListItem.parentNode,*/
//var clickedGallery = clickedListItem.parentNode.parentNode.parentNode.parentNode.parentNode,
var clickedGalleryObject = jQuery(clickedListItem).closest('div.pg-photoswipe'),
clickedGallery = clickedGalleryObject[0],
/* NOT DIRECT PARENT childNodes = clickedListItem.parentNode.childNodes,*/
childNodes = jQuery(clickedGallery).find('figure'),
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) {
// open PhotoSwipe if valid index found
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);
}
return params;
};
var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
var pswpElement = document.querySelectorAll('.pswp')[0],
gallery,
options,
items;
items = parseThumbnailElements(galleryElement);
// define options (if needed)
options = {
// define gallery index (for URL)
galleryUID: galleryElement.getAttribute('data-pswp-uid'),
getThumbBoundsFn: function(index) {
// See Options -> getThumbBoundsFn section of documentation 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};
}
};
// PhotoSwipe opened from URL
if(fromURL) {
if(options.galleryPIDs) {
// parse real index when custom PIDs are used
// http://photoswipe.com/documentation/faq.html#custom-pid-in-url
for(var j = 0; j < items.length; j++) {
if(items[j].pid == index) {
options.index = j;
break;
}
}
} else {
// in URL indexes start from 1
options.index = parseInt(index, 10) - 1;
}
} else {
options.index = parseInt(index, 10);
}
// exit if index not found
if( isNaN(options.index) ) {
return;
}
if(disableAnimation) {
options.showAnimationDuration = 0;
}
// Pass data to PhotoSwipe and initialize it
gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
/* SLIDESHOW */
setSlideshowState(ssButtonClass, true /* not running from the start */);
// start timer for the next slide in slideshow after prior image has loaded
gallery.listen('afterChange', function() {
if (ssRunning && ssOnce) {
ssOnce = false;
setTimeout(gotoNextSlide, ssDelay);
}
});
gallery.listen('destroy', function() { gallery = null; });
/* END SLIDESHOW */
gallery.init();
/* YouTube */
gallery.listen('beforeChange', function() {
var currItem = jQuery(gallery.currItem.container);
jQuery('.ph-pswp-video-wrapper iframe').removeClass('active');
var currItemIframe = currItem.find('.ph-pswp-video-wrapper iframe').addClass('active');
jQuery('.ph-pswp-video-wrapper iframe').each(function() {
if (!jQuery(this).hasClass('active')) {
jQuery(this).attr('src', jQuery(this).attr('src'));
}
});
});
gallery.listen('close', function() {
jQuery('.ph-pswp-video-wrapper iframe').each(function() {
jQuery(this).attr('src', jQuery(this).attr('src'));
});
});
/* SLIDESHOW FUNCTIONS */
// slideshow vars:
var ssRunning = false,
ssOnce = false,
ssDelay = 2500 /*ms*/,
ssButtonClass = '.pswp__button--playpause';
/* slideshow management */
jQuery(ssButtonClass).on('click touchstart', function(e) {
// toggle slideshow on/off
setSlideshowState(this, !ssRunning);
//gallery.next();
});
function setSlideshowState(el, running) {
if (running) {
setTimeout(gotoNextSlide, ssDelay / 2.0 /* first time wait less */);
}
var title = running ? jQuery('#phTxtPauseSlideshow').text() : jQuery('#phTxtPlaySlideshow').text();
jQuery(el).removeClass(running ? "play" : "pause") // change icons defined in css
.addClass(running ? "pause" : "play")
.prop('title', title);
ssRunning = running;
}
function gotoNextSlide() {
if (ssRunning && !!gallery) {
ssOnce = true;
gallery.next();
// start counter for next slide in 'afterChange' listener
}
}
/* override handling of Esc key to stop slideshow on first esc (note Esc to leave fullscreen never gets here) */
jQuery(document).keydown(function(e) {
if (e.altKey || e.ctrlKey || e.shiftKey || e.metaKey) return;
if ((e.key === "Escape" || e.which == 27 /*esc*/) && !!gallery) {
if (e.preventDefault) e.preventDefault();
else e.returnValue = false;
if (ssRunning) {
setSlideshowState(ssButtonClass, false);
} else {
gallery.close();
}
}
});
/* END SLIDESHOW FUNCTIONS */
};
// 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;
}
// Parse URL and open gallery if it contains #&pid=3&gid=1
var hashData = photoswipeParseHash();
if(hashData.pid && hashData.gid) {
openPhotoSwipe( hashData.pid , galleryElements[ hashData.gid - 1 ], true, true );
}
};
// execute above function
initPhotoSwipeFromDOM('.pg-photoswipe');