PhotoSwipe support

exampleSite/content/post/2017-03-20-photoswipe-gallery-sample.md

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+---
+title: Photoswipe Gallery Sample
+subtitle: Making a Gallery
+date: 2017-03-20
+tags: ["example", "photoswipe"]
+---
+
+Beautiful Hugo adds a few custom shortcodes created by [Li-Wen Yip](https://www.liwen.id.au/photoswipe/) and [Gert-Jan van den Berg](https://github.com/GjjvdBurg/HugoPhotoSwipe) for making galleries with [PhotoSwipe](photoswipe.com) . 
+
+{{< gallery >}}
+  {{< figure thumb="-thumb" link="/img/hexagon.jpg" >}}
+  {{< figure thumb="-thumb" link="/img/sphere.jpg" alt="Sphere">}}
+  {{< figure thumb="-thumb" link="/img/triangle.jpg" alt="Triangle" caption="This is a long comment about a triangle">}}
+{{< /gallery >}}
+{{< pswp-init >}}
+
+<!--more-->
+## Example
+The above gallery was created using the following shortcodes:
+```
+{{</* gallery */>}}
+  {{</* figure thumb="-thumb" link="/img/hexagon.jpg" */>}}
+  {{</* figure thumb="-thumb" link="/img/sphere.jpg" */>}}
+  {{</* figure thumb="-thumb" link="/img/triangle.jpg" */>}}
+{{</* /gallery */>}}
+{{</* pswp-init */>}}
+```
+
+## Usage
+As described on the [GitHub](https://github.com/liwenyip/hugo-pswp) page:
+
+* Call `{{</* pswp-init */>}}` **once** anywhere you want on each page where you want to use PhotoSwipe
+* `{{</* figure src="image.jpg" */>}}` will use `image.jpg` for thumbnail and lightbox
+* `{{</* figure src="thumb.jpg" link="image.jpg" */>}}` will use `thumb.jpg` for thumbnail and `image.jpg` for lightbox
+* `{{</* figure thumb="-small" link="image.jpg" */>}}` will use `image-small.jpg` for thumbnail and `image.jpg` for lightbox
+* `{{</* figure thumb="-small" link="image.jpg" size="1024x768 "*/>}}` will avoid needing to pre-load `image.jpg` to determine its size (optional)
+* All the [features/parameters](https://gohugo.io/extras/shortcodes) of Hugo's built-in `figure` shortcode work as normal, i.e. src, link, title, caption, class, attr (attribution), attrlink, alt
+* `{{</* figure src="image.jpg" class="pswp-ignore" */>}}` will be ignored by PhotoSwipe (if that's what you really want)
+* enclose your figures in `{{</* gallery title="title of your gallery (optional)" */>}}` and `{{</* /gallery */>}}` to arrange your thumbnails inside a box 

layouts/partials/footer.html

@@ -196,8 +196,11 @@
 
 <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.js" integrity="sha384-/y1Nn9+QQAipbNQWU65krzJralCnuOasHncUFXGkdwntGeSvQicrYkiUBwsgUqc1" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/contrib/auto-render.min.js" integrity="sha384-dq1/gEHSxPZQ7DdrM82ID4YVol9BYyU7GbWlIwnwyPzotpoc57wDw/guX8EaYGPx" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.js" integrity="sha256-UplRCs9v4KXVJvVY+p+RSo5Q4ilAUXh7kpjyIP5odyc=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe-ui-default.min.js" integrity="sha256-PWHOlUzc96pMc8ThwRIXPn8yH4NOLu42RQ0b9SpnpFk=" crossorigin="anonymous"></script>
 <script src="https://code.jquery.com/jquery-1.12.4.min.js" integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ=" crossorigin="anonymous"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
+<script src="{{ .Site.BaseURL }}/js/pswp-init.js"></script>
 <script src="{{ .Site.BaseURL }}/js/main.js"></script>
 <script src="{{ .Site.BaseURL }}/js/highlight.min.js"></script>
 <script> hljs.initHighlightingOnLoad(); </script>

layouts/partials/head.html

@@ -18,7 +18,10 @@
   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic" />
   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" />
   <link rel="stylesheet" href="{{ .Site.BaseURL }}/css/pygment_highlights.css" />
-  <link rel="stylesheet" href="{{ .Site.BaseURL }}/css/highlight.min.css">
+  <link rel="stylesheet" href="{{ .Site.BaseURL }}/css/highlight.min.css" />
+  <link rel="stylesheet" href="{{ .Site.BaseURL }}/css/pswp-gallery.css" />
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/photoswipe.min.css" integrity="sha256-sCl5PUOGMLfFYctzDW3MtRib0ctyUvI9Qsmq2wXOeBY=" crossorigin="anonymous" />
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/photoswipe/4.1.1/default-skin/default-skin.min.css" integrity="sha256-BFeI1V+Vh1Rk37wswuOYn5lsTcaU96hGaI7OUVCLjPc=" crossorigin="anonymous" />
 
   <!-- Facebook OpenGraph tags -->
   {{ if .Site.Params.fb_app_id }}

layouts/shortcodes/figure.html

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+<figure {{ with .Get "class" }}class="{{.}}"{{ end }} itemprop="associatedMedia" itemscope itemtype="http://schema.org/ImageObject">
+  <a class="rig-cell" href="{{ with .Get "link" }}{{.}}{{ else }}{{ .Get "src" }}{{ end }}" {{ with .Get "size" }}data-size="{{.}}"{{ end }} itemprop="contentUrl"> 
+      <img class="rig-img" itemprop="thumbnail"
+          src="{{ with .Get "src" }}{{.}}{{ else }}{{ printf "%s." (.Get "thumb") | replace (.Get "link") "." }}{{ end }}"
+          {{ with .Get "alt" }}alt="{{.}}"{{ end }}
+          {{ with .Get "width" }}width="{{.}}"{{ end }}/>
+      <span class="rig-overlay"></span>
+      <span class="rig-text">{{ .Get "alt"}}</span>
+  </a>
+  <figcaption itemprop="caption description">
+    {{ .Get "caption"}}
+    <!--<span itemprop="copyrightHolder">&#169; {{ .Get "copyright"}}</span>-->
+  </figcaption>
+</figure>

layouts/shortcodes/gallery.html

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+<div class="gallery" id="rig" itemscope itemtype="http://schema.org/ImageGallery">
+  {{ .Inner }}
+  <div class="title">{{ .Get "title" }}</div>
+</div>

layouts/shortcodes/pswp-init.html

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+<!-- Root element of PhotoSwipe. Must have class pswp. -->
+<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">
+  <!-- Background of PhotoSwipe.
+      It's a separate element, as animating opacity is faster than rgba(). -->
+  <div class="pswp__bg"></div>
+  <!-- Slides wrapper with overflow:hidden. -->
+  <div class="pswp__scroll-wrap">
+    <!-- Container that holds slides.
+      PhotoSwipe keeps only 3 of them in DOM to save memory.
+      Don't modify these 3 pswp__item elements, data is added later on. -->
+    <div class="pswp__container">
+      <div class="pswp__item"></div>
+      <div class="pswp__item"></div>
+      <div class="pswp__item"></div>
+    </div>
+    <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
+    <div class="pswp__ui pswp__ui--hidden">
+      <div class="pswp__top-bar">
+        <!--  Controls are self-explanatory. Order can be changed. -->
+        <div class="pswp__counter"></div>
+        <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
+        <button class="pswp__button pswp__button--share" title="Share"></button>
+        <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>
+        <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>
+        <!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR -->
+        <!-- element will get class pswp__preloader--active when preloader is running -->
+        <div class="pswp__preloader">
+          <div class="pswp__preloader__icn">
+            <div class="pswp__preloader__cut">
+              <div class="pswp__preloader__donut"></div>
+            </div>
+          </div>
+        </div>
+      </div>
+      <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
+        <div class="pswp__share-tooltip"></div>
+      </div>
+      <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
+      </button>
+      <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
+      </button>
+      <div class="pswp__caption">
+        <div class="pswp__caption__center"></div>
+      </div>
+    </div>
+  </div>
+</div>

static/css/pswp-gallery.css

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+#rig {
+    max-width:900px;
+    margin:0 auto; /*center aligned*/
+    padding:0;
+    font-size:0; /* Remember to change it back to normal font size if have captions */
+    list-style:none;
+}
+#rig figure {
+    display: inline-block;
+    *display:inline;/*for IE6 - IE7*/
+    width:25%;
+    vertical-align:middle;
+    box-sizing:border-box;
+    margin:0;
+    padding:0;
+}
+        
+/* The wrapper for each item */
+.rig-cell {
+    margin:0 12px 12px 0;
+    
+    box-shadow:0 0 6px rgba(0,0,0,0.3);
+    display:block;
+    position: relative;
+    overflow:hidden;
+}
+        
+/* If have the image layer */
+.rig-img {
+    display:block;
+    width: 100%;
+    height: auto;
+    border:none;
+    transform:scale(1);
+    transition:all 1s;
+}
+
+#rig figure:hover .rig-img {
+    transform:scale(1.05);
+}
+        
+/* If have the overlay layer */
+.rig-overlay {
+    position: absolute;
+    display:block;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    right: 0;
+    margin: auto;
+    background: #3DC0F1;
+    background-size:50px 50px;
+    opacity:0;
+    filter:alpha(opacity=0);/*For IE6 - IE8*/
+    transition:all 0.6s;
+}
+#rig figure:hover .rig-overlay {
+    opacity:0.8;
+}
+
+/* If have captions */
+.rig-text {
+    display:block;
+    padding:0 30px;
+    box-sizing:border-box;
+    position:absolute;
+    left:0;
+    width:100%;
+    text-align:center;
+    text-transform:capitalize;
+    font-size:18px;
+    font-weight:bold;
+    font-family: 'Oswald', sans-serif;
+    font-weight:normal!important;
+    top:40%;
+    color:white;
+    opacity:0;
+    filter:alpha(opacity=0);/*For older IE*/
+    transform:translateY(-20px);
+    transition:all .3s;
+}
+#rig figure:hover .rig-text {
+    transform:translateY(0px);
+    opacity:0.9;
+}
+
+@media (max-width: 9000px) {
+    #rig figure {
+        width:25%;
+    }
+}
+
+@media (max-width: 700px) {
+    #rig figure {
+        width:33.33%;
+    }
+}
+
+@media (max-width: 550px) {
+    #rig figure {
+        width:50%;
+    }
+}

static/js/pswp-init.js

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+/*
+Put this file in /static/js/pswp-init.js
+*/
+$( document ).ready(function() {
+	var items = []; // array of slide objects that will be passed to PhotoSwipe()
+	// for every figure element on the page:
+	$('figure').each( function() {
+		if ($(this).attr('class') == 'pswp-ignore') return true; // ignore any figures where class="pswp-ignore"
+		// get properties from child a/img/figcaption elements,
+		var $figure = $(this),
+			$a 		= $figure.find('a'),
+			$src	= $a.attr('href'),
+			$title  = $figure.find('figcaption').html(),
+			$msrc	= $figure.find('img').attr('src');
+		// if data-size on <a> tag is set, read it and create an item
+		if ($a.data('size')) {
+			var $size 	= $a.data('size').split('x');
+			var item = {
+				src		: $src,
+				w		: $size[0],
+				h 		: $size[1],
+				title 	: $title,
+				msrc	: $msrc
+			};
+		// if not, set temp default size then load the image to check actual size
+		} else {
+			var item = {
+				src		: $src,
+				w		: 800, // temp default size
+				h 		: 600, // temp default size
+				title 	: $title,
+				msrc	: $msrc
+			};
+			// load the image to check its dimensions
+			// update the item as soon as w and h are known (check every 30ms)
+			var img = new Image(); 
+			img.src = $src;
+			var wait = setInterval(function() {
+				var w = img.naturalWidth,
+					h = img.naturalHeight;
+				if (w && h) {
+					clearInterval(wait);
+					item.w = w;
+					item.h = h;
+				}
+			}, 30);
+	   	}
+		// Save the index of this image then add it to the array
+		var index = items.length;
+		items.push(item);
+		// Event handler for click on a figure
+		$figure.on('click', function(event) {
+			event.preventDefault(); // prevent the normal behaviour i.e. load the <a> hyperlink
+			// Get the PSWP element and initialise it with the desired options
+			var $pswp = $('.pswp')[0];
+			var options = {
+				index: index, 
+				bgOpacity: 0.8,
+				showHideOpacity: true
+			}
+			new PhotoSwipe($pswp, PhotoSwipeUI_Default, items, options).init();
+		});	
+	});
+});