From b7081b32de162819cd7d31119200b2b06834dfc9 Mon Sep 17 00:00:00 2001
From: Lars Jung <lrsjng@gmail.com>
Date: Mon, 9 Jun 2014 00:02:48 +0200
Subject: [PATCH] Add video preview.

---
 src/_h5ai/client/css/inc/preview-vid.less  |  14 +++
 src/_h5ai/client/js/inc/ext/preview-vid.js | 125 +++++++++++++++++++++
 src/_h5ai/conf/options.json                |  10 ++
 3 files changed, 149 insertions(+)
 create mode 100644 src/_h5ai/client/css/inc/preview-vid.less
 create mode 100644 src/_h5ai/client/js/inc/ext/preview-vid.js

diff --git a/src/_h5ai/client/css/inc/preview-vid.less b/src/_h5ai/client/css/inc/preview-vid.less
new file mode 100644
index 00000000..a0c292ce
--- /dev/null
+++ b/src/_h5ai/client/css/inc/preview-vid.less
@@ -0,0 +1,14 @@
+
+#pv-vid-video {
+	position: absolute;
+
+	max-width: 100%;
+	max-height: 100%;
+
+	box-shadow: 0 0 8px 2px rgba(0, 0, 0, 0.3);
+}
+
+#pv-vid-video:-webkit-full-screen {
+	top: auto !important;
+	left: auto !important;
+}
diff --git a/src/_h5ai/client/js/inc/ext/preview-vid.js b/src/_h5ai/client/js/inc/ext/preview-vid.js
new file mode 100644
index 00000000..4377c4cb
--- /dev/null
+++ b/src/_h5ai/client/js/inc/ext/preview-vid.js
@@ -0,0 +1,125 @@
+
+modulejs.define('ext/preview-vid', ['_', '$', 'core/settings', 'core/event', 'ext/preview'], function (_, $, allsettings, event, preview) {
+
+	var settings = _.extend({
+			enabled: false,
+			types: []
+		}, allsettings['preview-vid']),
+
+		preloadVid = function (src, callback) {
+
+			var $video = $('<video/>')
+				.one('loadedmetadata', function () {
+
+					callback($video);
+					// setTimeout(function () { callback($video); }, 1000); // for testing
+				})
+				.attr('autoplay', 'autoplay')
+				.attr('controls', 'controls')
+				.attr('preload', 'auto')
+				.attr('src', src);
+		},
+
+		onEnter = function (items, idx) {
+
+			var currentItems = items,
+				currentIdx = idx,
+				currentItem = items[idx],
+
+				onAdjustSize = function () {
+
+					var $content = $('#pv-content'),
+						$vid = $('#pv-vid-video');
+
+					if ($vid.length) {
+
+						$vid.css({
+							'left': '' + (($content.width()-$vid.width())*0.5) + 'px',
+							'top': '' + (($content.height()-$vid.height())*0.5) + 'px',
+							'max-width': $content.width(),
+							'height': $content.height()
+						});
+
+						preview.setLabels([
+							currentItem.label,
+							'' + $vid[0].videoWidth + 'x' + $vid[0].videoHeight,
+							'' + (100 * $vid.width() / $vid[0].videoWidth).toFixed(0) + '%'
+						]);
+					}
+				},
+
+				onIdxChange = function (rel) {
+
+					currentIdx = (currentIdx + rel + currentItems.length) % currentItems.length;
+					currentItem = currentItems[currentIdx];
+
+					var spinnerTimeout = setTimeout(function () { preview.showSpinner(true); }, 200);
+
+					if ($('#pv-vid-video').length) {
+						$('#pv-vid-video')[0].pause();
+					}
+					preloadVid(currentItem.absHref, function ($preloaded_vid) {
+
+						clearTimeout(spinnerTimeout);
+						preview.showSpinner(false);
+
+						$('#pv-content').fadeOut(100, function () {
+							$('#pv-content').empty().append($preloaded_vid.attr('id', 'pv-vid-video')).fadeIn(200);
+
+							// small timeout, so $preloaded_vid is visible and therefore $preloaded_vid.width is available
+							setTimeout(function () {
+								onAdjustSize();
+
+								preview.setIndex(currentIdx + 1, currentItems.length);
+								preview.setRawLink(currentItem.absHref);
+							}, 10);
+						});
+					});
+				};
+
+			onIdxChange(0);
+			preview.setOnIndexChange(onIdxChange);
+			preview.setOnAdjustSize(onAdjustSize);
+			preview.enter();
+		},
+
+		initItem = function (item) {
+
+			if (item.$view && _.indexOf(settings.types, item.type) >= 0) {
+				item.$view.find('a').on('click', function (event) {
+
+					event.preventDefault();
+
+					var matchedEntries = _.compact(_.map($('#items .item'), function (item) {
+
+						item = $(item).data('item');
+						return _.indexOf(settings.types, item.type) >= 0 ? item : null;
+					}));
+
+					onEnter(matchedEntries, _.indexOf(matchedEntries, item));
+				});
+			}
+		},
+
+		onLocationChanged = function (item) {
+
+			_.each(item.content, initItem);
+		},
+
+		onLocationRefreshed = function (item, added, removed) {
+
+			_.each(added, initItem);
+		},
+
+		init = function () {
+
+			if (!settings.enabled) {
+				return;
+			}
+
+			event.sub('location.changed', onLocationChanged);
+			event.sub('location.refreshed', onLocationRefreshed);
+		};
+
+	init();
+});
diff --git a/src/_h5ai/conf/options.json b/src/_h5ai/conf/options.json
index 64123635..6c679cd1 100644
--- a/src/_h5ai/conf/options.json
+++ b/src/_h5ai/conf/options.json
@@ -249,6 +249,16 @@ Options
 		}
 	},
 
+	/*
+	Show a video preview on click.
+
+	- types: array of types
+	*/
+	"preview-vid": {
+		"enabled": true,
+		"types": ["vid"]
+	},
+
 	/*
 	Show QRCodes on hovering files.