From e9fa05b0a068fde0197ea01f2ff31e2513b7965f Mon Sep 17 00:00:00 2001
From: Holger Levsen <holger@layer-acht.org>
Date: Thu, 24 Nov 2016 02:01:54 +0100
Subject: copied from git.debian.org/git/reproducible/presentations.git /
 2016-11-13-MiniDebConfCambridge there, Copyright & thanks to Chris Lamb

Signed-off-by: Holger Levsen <holger@layer-acht.org>
---
 .../2016-11-30-Profitbricks/plugin/notes/notes.js  | 127 +++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 presentations/2016-11-30-Profitbricks/plugin/notes/notes.js

(limited to 'presentations/2016-11-30-Profitbricks/plugin/notes/notes.js')

diff --git a/presentations/2016-11-30-Profitbricks/plugin/notes/notes.js b/presentations/2016-11-30-Profitbricks/plugin/notes/notes.js
new file mode 100644
index 00000000..202e73b9
--- /dev/null
+++ b/presentations/2016-11-30-Profitbricks/plugin/notes/notes.js
@@ -0,0 +1,127 @@
+/**
+ * Handles opening of and synchronization with the reveal.js
+ * notes window.
+ *
+ * Handshake process:
+ * 1. This window posts 'connect' to notes window
+ *    - Includes URL of presentation to show
+ * 2. Notes window responds with 'connected' when it is available
+ * 3. This window proceeds to send the current presentation state
+ *    to the notes window
+ */
+var RevealNotes = (function() {
+
+	function openNotes() {
+		var jsFileLocation = document.querySelector('script[src$="notes.js"]').src;  // this js file path
+		jsFileLocation = jsFileLocation.replace(/notes\.js(\?.*)?$/, '');   // the js folder path
+		var notesPopup = window.open( jsFileLocation + 'notes.html', 'reveal.js - Notes', 'width=1100,height=700' );
+
+		/**
+		 * Connect to the notes window through a postmessage handshake.
+		 * Using postmessage enables us to work in situations where the
+		 * origins differ, such as a presentation being opened from the
+		 * file system.
+		 */
+		function connect() {
+			// Keep trying to connect until we get a 'connected' message back
+			var connectInterval = setInterval( function() {
+				notesPopup.postMessage( JSON.stringify( {
+					namespace: 'reveal-notes',
+					type: 'connect',
+					url: window.location.protocol + '//' + window.location.host + window.location.pathname + window.location.search,
+					state: Reveal.getState()
+				} ), '*' );
+			}, 500 );
+
+			window.addEventListener( 'message', function( event ) {
+				var data = JSON.parse( event.data );
+				if( data && data.namespace === 'reveal-notes' && data.type === 'connected' ) {
+					clearInterval( connectInterval );
+					onConnected();
+				}
+			} );
+		}
+
+		/**
+		 * Posts the current slide data to the notes window
+		 */
+		function post() {
+
+			var slideElement = Reveal.getCurrentSlide(),
+				notesElement = slideElement.querySelector( 'aside.notes' );
+
+			var messageData = {
+				namespace: 'reveal-notes',
+				type: 'state',
+				notes: '',
+				markdown: false,
+				whitespace: 'normal',
+				state: Reveal.getState()
+			};
+
+			// Look for notes defined in a slide attribute
+			if( slideElement.hasAttribute( 'data-notes' ) ) {
+				messageData.notes = slideElement.getAttribute( 'data-notes' );
+				messageData.whitespace = 'pre-wrap';
+			}
+
+			// Look for notes defined in an aside element
+			if( notesElement ) {
+				messageData.notes = notesElement.innerHTML;
+				messageData.markdown = typeof notesElement.getAttribute( 'data-markdown' ) === 'string';
+			}
+
+			notesPopup.postMessage( JSON.stringify( messageData ), '*' );
+
+		}
+
+		/**
+		 * Called once we have established a connection to the notes
+		 * window.
+		 */
+		function onConnected() {
+
+			// Monitor events that trigger a change in state
+			Reveal.addEventListener( 'slidechanged', post );
+			Reveal.addEventListener( 'fragmentshown', post );
+			Reveal.addEventListener( 'fragmenthidden', post );
+			Reveal.addEventListener( 'overviewhidden', post );
+			Reveal.addEventListener( 'overviewshown', post );
+			Reveal.addEventListener( 'paused', post );
+			Reveal.addEventListener( 'resumed', post );
+
+			// Post the initial state
+			post();
+
+		}
+
+		connect();
+	}
+
+	if( !/receiver/i.test( window.location.search ) ) {
+
+		// If the there's a 'notes' query set, open directly
+		if( window.location.search.match( /(\?|\&)notes/gi ) !== null ) {
+			openNotes();
+		}
+
+		// Open the notes when the 's' key is hit
+		document.addEventListener( 'keydown', function( event ) {
+			// Disregard the event if the target is editable or a
+			// modifier is present
+			if ( document.querySelector( ':focus' ) !== null || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
+
+			// Disregard the event if keyboard is disabled
+			if ( Reveal.getConfig().keyboard === false ) return;
+
+			if( event.keyCode === 83 ) {
+				event.preventDefault();
+				openNotes();
+			}
+		}, false );
+
+	}
+
+	return { open: openNotes };
+
+})();
-- 
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