84 lines
3.4 KiB
JavaScript
84 lines
3.4 KiB
JavaScript
/*
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Put this file in /static/js/load-photoswipe.js
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Documentation and licence at https://github.com/liwenyip/hugo-easy-gallery/
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*/
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/* Show an alert if this js file has been loaded twice */
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if (window.loadphotoswipejs) {
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window.alert("You've loaded load-photoswipe.js twice. See https://github.com/liwenyip/hugo-easy-gallery/issues/6")
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}
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var loadphotoswipejs = 1
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/* TODO: Make the share function work */
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document.addEventListener('DOMContentLoaded', function() {
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var items = []; // array of slide objects that will be passed to PhotoSwipe()
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// for every figure element on the page:
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document.querySelectorAll('figure').forEach(function($figure, index) {
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if ($figure.className == 'no-photoswipe') return true; // ignore any figures where class="no-photoswipe"
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var $a = $figure.querySelector('a'),
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$img = $figure.querySelector('img'),
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$src = $a.href,
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$title = $img.alt,
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$msrc = $img.src;
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// if data-size on <a> tag is set, read it and create an item
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if ($a.dataset.size) {
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var $size = $a.dataset.size.split('x');
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var item = {
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src : $src,
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w : $size[0],
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h : $size[1],
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title : $title,
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msrc : $msrc
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};
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console.log("Using pre-defined dimensions for " + $src);
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// if not, set temp default size then load the image to check actual size
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} else {
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var item = {
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src : $src,
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w : 400, // temp default size
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h : 300, // temp default size
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title : $title,
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msrc : $msrc
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};
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console.log("Using default dimensions for " + $src);
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// load the image to check its dimensions
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// update the item as soon as w and h are known (check every 30ms)
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var img = new Image();
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img.src = $src;
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var wait = setInterval(function() {
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var w = img.naturalWidth,
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h = img.naturalHeight;
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if (w && h) {
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clearInterval(wait);
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item.w = w;
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item.h = h;
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console.log("Got actual dimensions for " + img.src);
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// Update the figure parent div's max width.
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var $parentDiv = $figure.parentElement;
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if (!$parentDiv.hasOwnProperty("style")) {
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$figure.parentElement.style = "max-width: " + w + "px"
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}
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}
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}, 30);
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}
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// Save the index of this image then add it to the array
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items.push(item);
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// Event handler for click on a figure
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$figure.addEventListener('click', function(event) {
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event.preventDefault(); // prevent the normal behaviour i.e. load the <a> hyperlink
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// Get the PSWP element and initialize it with the desired options
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var $pswp = document.querySelector('.pswp');
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var options = {
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index: index,
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bgOpacity: 0.8,
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showHideOpacity: true,
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showHideAnimationType: 'zoom',
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focus: 'false',
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history: 'false'
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}
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new PhotoSwipe($pswp, PhotoSwipeUI_Default, items, options).init();
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}, false);
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});
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}, false);
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