From ad823cc4d72edbab10f0dadf99b30df91c3f7c50 Mon Sep 17 00:00:00 2001
From: Dimitar Trendafilov <trendafilov.dn@gmail.com>
Date: Sun, 16 Aug 2020 08:38:04 +0300
Subject: Squashed 'website/themes/reveal-hugo/' content from commit ff9f389

git-subtree-dir: website/themes/reveal-hugo
git-subtree-split: ff9f389743ae2fe5c5cc6101455db0616e8548e2
---
 .../static/plugin/gallery/gallery.plugin.js        | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 exampleSite/static/plugin/gallery/gallery.plugin.js

(limited to 'exampleSite/static/plugin/gallery/gallery.plugin.js')

diff --git a/exampleSite/static/plugin/gallery/gallery.plugin.js b/exampleSite/static/plugin/gallery/gallery.plugin.js
new file mode 100644
index 0000000..c6ba1c9
--- /dev/null
+++ b/exampleSite/static/plugin/gallery/gallery.plugin.js
@@ -0,0 +1,119 @@
+(function(Gallery) {
+	var galleryTimer, galleryMode;
+
+	Gallery.step = function (items, iterations) {
+		var length = items.length,
+			ptr = 0,
+			loops = 0;
+
+		return function () {
+			if (iterations > 0 && loops === iterations) {
+				return;
+			}
+			items[ptr].className = "inactive";
+			if (ptr === length - 1) {
+				loops++;
+				if (iterations === 0 || loops < iterations) {
+					ptr = 0;
+				}
+			} else {
+				ptr++;
+			}
+			items[ptr].className = "active";
+		};
+	};
+
+	Gallery.start = function (galleryNode, contextNode) {
+		contextNode = contextNode || document.body.firstChild;
+		galleryMode = galleryNode.dataset.mode || 'normal';
+
+		if (galleryMode === 'full-screen') {
+			// FIXME remove depenency on Reveal, have a callback? function
+			// that will get a root node to move full screen slides to (ie. slidesNode)
+
+			// for full screen mode we need to: 
+			// - take the gallery out of the flow and insert it before "slides"
+			// - hide slides
+			// - make it full screen
+
+			var placeholder = document.createElement("div");
+			placeholder.id = "gallery-placeholder";
+			galleryNode.parentNode.replaceChild(placeholder, galleryNode);
+
+			if (contextNode.parentNode) {
+				contextNode.parentNode.insertBefore(galleryNode, contextNode);
+			}
+		}
+
+		var items = Array.prototype.slice.apply(galleryNode.querySelectorAll("li"));
+		items.forEach(function (item, index) {
+			if (index === 0) {
+				item.className = "active";
+			} else {
+				item.className = "inactive";
+			}
+			var label = item.querySelector("label");
+			var img = item.querySelector("img");
+
+			if (galleryMode === 'full-screen') {
+				img.style.display = "none";
+				item.style.backgroundImage = "url(" + img.src + ")";
+			} else {
+				img.style.display = "";
+			}
+
+			if (!label && img.attributes.alt) {
+				label = document.createElement("label");
+				label.innerHTML = img.attributes.alt.value;
+				item.appendChild(label);
+			}
+		});
+
+		var iterations = galleryNode.dataset.iterations ? +galleryNode.dataset.iterations : 1;
+		var interval = (galleryNode.dataset.interval || 1) * 1000;
+		galleryTimer = setInterval(Gallery.step(items, iterations), interval);
+	};
+
+	// FIXME Gallery.stop should take elem and root nodes as well
+	Gallery.stop = function (galleryNode, contextNode) {
+		clearInterval(galleryTimer);
+
+		if (galleryMode === "full-screen") {
+			// - put the gallery back where it was
+			var placeholder = document.getElementById("gallery-placeholder");
+			placeholder.parentNode.replaceChild(galleryNode, placeholder);
+
+			var items = Array.prototype.slice.apply(galleryNode.querySelectorAll("li"));
+			items.forEach(function (item, index) {
+				var img = item.querySelector("img");
+				item.style.backgroundImage = "";
+				img.style.display = "";
+			});
+		}
+	};
+})(window.Gallery = window.Gallery || {});(function() {
+	if( typeof window.addEventListener === 'function' ) {
+		var slidesNode = document.querySelector(".slides");
+		Reveal.addEventListener("slidechanged", function (event) {
+	    console.log(event)
+			var galleryNode = event.previousSlide.querySelector('.gallery') || document.querySelector('.reveal > .gallery');
+			if (galleryNode) {
+				Gallery.stop(galleryNode, slidesNode);
+			}
+
+			galleryNode = event.currentSlide.querySelector('.gallery');
+			if (galleryNode) {				
+				Gallery.start(galleryNode, slidesNode);
+			}
+
+		});
+
+		// during initial load
+		if (Reveal.getCurrentSlide()) {
+			var galleryNode = Reveal.getCurrentSlide().querySelector('.gallery');
+			if (galleryNode) {
+				Gallery.start(galleryNode, slidesNode);
+			}
+		}
+	}
+})();
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