From be428000a5dd8081113323131cbc5af837a15e05 Mon Sep 17 00:00:00 2001
From: Holger Levsen <holger@layer-acht.org>
Date: Fri, 4 Aug 2017 09:44:48 -0400
Subject: copied from ../2016-11-30-Profitbricks without any changes yet

Signed-off-by: Holger Levsen <holger@layer-acht.org>
---
 .../plugin/notes-server/client.js                  |  65 ++++
 .../plugin/notes-server/index.js                   |  68 ++++
 .../plugin/notes-server/notes.html                 | 407 +++++++++++++++++++++
 3 files changed, 540 insertions(+)
 create mode 100644 userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/client.js
 create mode 100644 userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/index.js
 create mode 100644 userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/notes.html

(limited to 'userContent/presentations/2017-08-07-DebConf17/plugin/notes-server')

diff --git a/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/client.js b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/client.js
new file mode 100644
index 00000000..00b277ba
--- /dev/null
+++ b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/client.js
@@ -0,0 +1,65 @@
+(function() {
+
+	// don't emit events from inside the previews themselves
+	if( window.location.search.match( /receiver/gi ) ) { return; }
+
+	var socket = io.connect( window.location.origin ),
+		socketId = Math.random().toString().slice( 2 );
+
+	console.log( 'View slide notes at ' + window.location.origin + '/notes/' + socketId );
+
+	window.open( window.location.origin + '/notes/' + socketId, 'notes-' + socketId );
+
+	/**
+	 * Posts the current slide data to the notes window
+	 */
+	function post() {
+
+		var slideElement = Reveal.getCurrentSlide(),
+			notesElement = slideElement.querySelector( 'aside.notes' );
+
+		var messageData = {
+			notes: '',
+			markdown: false,
+			socketId: socketId,
+			state: Reveal.getState()
+		};
+
+		// Look for notes defined in a slide attribute
+		if( slideElement.hasAttribute( 'data-notes' ) ) {
+			messageData.notes = slideElement.getAttribute( 'data-notes' );
+		}
+
+		// Look for notes defined in an aside element
+		if( notesElement ) {
+			messageData.notes = notesElement.innerHTML;
+			messageData.markdown = typeof notesElement.getAttribute( 'data-markdown' ) === 'string';
+		}
+
+		socket.emit( 'statechanged', messageData );
+
+	}
+
+	// When a new notes window connects, post our current state
+	socket.on( 'new-subscriber', function( data ) {
+		post();
+	} );
+
+	// When the state changes from inside of the speaker view
+	socket.on( 'statechanged-speaker', function( data ) {
+		Reveal.setState( data.state );
+	} );
+
+	// 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();
+
+}());
diff --git a/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/index.js b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/index.js
new file mode 100644
index 00000000..683f0645
--- /dev/null
+++ b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/index.js
@@ -0,0 +1,68 @@
+var http      = require('http');
+var express   = require('express');
+var fs        = require('fs');
+var io        = require('socket.io');
+var _         = require('underscore');
+var Mustache  = require('mustache');
+
+var app       = express();
+var staticDir = express.static;
+var server    = http.createServer(app);
+
+io = io(server);
+
+var opts = {
+	port :      1947,
+	baseDir :   __dirname + '/../../'
+};
+
+io.on( 'connection', function( socket ) {
+
+	socket.on( 'new-subscriber', function( data ) {
+		socket.broadcast.emit( 'new-subscriber', data );
+	});
+
+	socket.on( 'statechanged', function( data ) {
+		socket.broadcast.emit( 'statechanged', data );
+	});
+
+	socket.on( 'statechanged-speaker', function( data ) {
+		socket.broadcast.emit( 'statechanged-speaker', data );
+	});
+
+});
+
+[ 'css', 'js', 'images', 'plugin', 'lib' ].forEach( function( dir ) {
+	app.use( '/' + dir, staticDir( opts.baseDir + dir ) );
+});
+
+app.get('/', function( req, res ) {
+
+	res.writeHead( 200, { 'Content-Type': 'text/html' } );
+	fs.createReadStream( opts.baseDir + '/index.html' ).pipe( res );
+
+});
+
+app.get( '/notes/:socketId', function( req, res ) {
+
+	fs.readFile( opts.baseDir + 'plugin/notes-server/notes.html', function( err, data ) {
+		res.send( Mustache.to_html( data.toString(), {
+			socketId : req.params.socketId
+		}));
+	});
+
+});
+
+// Actually listen
+server.listen( opts.port || null );
+
+var brown = '\033[33m',
+	green = '\033[32m',
+	reset = '\033[0m';
+
+var slidesLocation = 'http://localhost' + ( opts.port ? ( ':' + opts.port ) : '' );
+
+console.log( brown + 'reveal.js - Speaker Notes' + reset );
+console.log( '1. Open the slides at ' + green + slidesLocation + reset );
+console.log( '2. Click on the link your JS console to go to the notes page' );
+console.log( '3. Advance through your slides and your notes will advance automatically' );
diff --git a/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/notes.html b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/notes.html
new file mode 100644
index 00000000..ad8c7190
--- /dev/null
+++ b/userContent/presentations/2017-08-07-DebConf17/plugin/notes-server/notes.html
@@ -0,0 +1,407 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Slide Notes</title>
+
+		<style>
+			body {
+				font-family: Helvetica;
+			}
+
+			#current-slide,
+			#upcoming-slide,
+			#speaker-controls {
+				padding: 6px;
+				box-sizing: border-box;
+				-moz-box-sizing: border-box;
+			}
+
+			#current-slide iframe,
+			#upcoming-slide iframe {
+				width: 100%;
+				height: 100%;
+				border: 1px solid #ddd;
+			}
+
+			#current-slide .label,
+			#upcoming-slide .label {
+				position: absolute;
+				top: 10px;
+				left: 10px;
+				font-weight: bold;
+				font-size: 14px;
+				z-index: 2;
+				color: rgba( 255, 255, 255, 0.9 );
+			}
+
+			#current-slide {
+				position: absolute;
+				width: 65%;
+				height: 100%;
+				top: 0;
+				left: 0;
+				padding-right: 0;
+			}
+
+			#upcoming-slide {
+				position: absolute;
+				width: 35%;
+				height: 40%;
+				right: 0;
+				top: 0;
+			}
+
+			#speaker-controls {
+				position: absolute;
+				top: 40%;
+				right: 0;
+				width: 35%;
+				height: 60%;
+
+				font-size: 18px;
+			}
+
+				.speaker-controls-time.hidden,
+				.speaker-controls-notes.hidden {
+					display: none;
+				}
+
+				.speaker-controls-time .label,
+				.speaker-controls-notes .label {
+					text-transform: uppercase;
+					font-weight: normal;
+					font-size: 0.66em;
+					color: #666;
+					margin: 0;
+				}
+
+				.speaker-controls-time {
+					border-bottom: 1px solid rgba( 200, 200, 200, 0.5 );
+					margin-bottom: 10px;
+					padding: 10px 16px;
+					padding-bottom: 20px;
+					cursor: pointer;
+				}
+
+				.speaker-controls-time .reset-button {
+					opacity: 0;
+					float: right;
+					color: #666;
+					text-decoration: none;
+				}
+				.speaker-controls-time:hover .reset-button {
+					opacity: 1;
+				}
+
+				.speaker-controls-time .timer,
+				.speaker-controls-time .clock {
+					width: 50%;
+					font-size: 1.9em;
+				}
+
+				.speaker-controls-time .timer {
+					float: left;
+				}
+
+				.speaker-controls-time .clock {
+					float: right;
+					text-align: right;
+				}
+
+				.speaker-controls-time span.mute {
+					color: #bbb;
+				}
+
+				.speaker-controls-notes {
+					padding: 10px 16px;
+				}
+
+				.speaker-controls-notes .value {
+					margin-top: 5px;
+					line-height: 1.4;
+					font-size: 1.2em;
+				}
+
+			.clear {
+				clear: both;
+			}
+
+			@media screen and (max-width: 1080px) {
+				#speaker-controls {
+					font-size: 16px;
+				}
+			}
+
+			@media screen and (max-width: 900px) {
+				#speaker-controls {
+					font-size: 14px;
+				}
+			}
+
+			@media screen and (max-width: 800px) {
+				#speaker-controls {
+					font-size: 12px;
+				}
+			}
+
+		</style>
+	</head>
+
+	<body>
+
+		<div id="current-slide"></div>
+		<div id="upcoming-slide"><span class="label">UPCOMING:</span></div>
+		<div id="speaker-controls">
+			<div class="speaker-controls-time">
+				<h4 class="label">Time <span class="reset-button">Click to Reset</span></h4>
+				<div class="clock">
+					<span class="clock-value">0:00 AM</span>
+				</div>
+				<div class="timer">
+					<span class="hours-value">00</span><span class="minutes-value">:00</span><span class="seconds-value">:00</span>
+				</div>
+				<div class="clear"></div>
+			</div>
+
+			<div class="speaker-controls-notes hidden">
+				<h4 class="label">Notes</h4>
+				<div class="value"></div>
+			</div>
+		</div>
+
+		<script src="/socket.io/socket.io.js"></script>
+		<script src="/plugin/markdown/marked.js"></script>
+
+		<script>
+		(function() {
+
+			var notes,
+				notesValue,
+				currentState,
+				currentSlide,
+				upcomingSlide,
+				connected = false;
+
+			var socket = io.connect( window.location.origin ),
+				socketId = '{{socketId}}';
+
+			socket.on( 'statechanged', function( data ) {
+
+				// ignore data from sockets that aren't ours
+				if( data.socketId !== socketId ) { return; }
+
+				if( connected === false ) {
+					connected = true;
+
+					setupKeyboard();
+					setupNotes();
+					setupTimer();
+
+				}
+
+				handleStateMessage( data );
+
+			} );
+
+			// Load our presentation iframes
+			setupIframes();
+
+			// Once the iframes have loaded, emit a signal saying there's
+			// a new subscriber which will trigger a 'statechanged'
+			// message to be sent back
+			window.addEventListener( 'message', function( event ) {
+
+				var data = JSON.parse( event.data );
+
+				if( data && data.namespace === 'reveal' ) {
+					if( /ready/.test( data.eventName ) ) {
+						socket.emit( 'new-subscriber', { socketId: socketId } );
+					}
+				}
+
+				// Messages sent by reveal.js inside of the current slide preview
+				if( data && data.namespace === 'reveal' ) {
+					if( /slidechanged|fragmentshown|fragmenthidden|overviewshown|overviewhidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {
+						socket.emit( 'statechanged-speaker', { state: data.state } );
+					}
+				}
+
+			} );
+
+			/**
+			 * Called when the main window sends an updated state.
+			 */
+			function handleStateMessage( data ) {
+
+				// Store the most recently set state to avoid circular loops
+				// applying the same state
+				currentState = JSON.stringify( data.state );
+
+				// No need for updating the notes in case of fragment changes
+				if ( data.notes ) {
+					notes.classList.remove( 'hidden' );
+					if( data.markdown ) {
+						notesValue.innerHTML = marked( data.notes );
+					}
+					else {
+						notesValue.innerHTML = data.notes;
+					}
+				}
+				else {
+					notes.classList.add( 'hidden' );
+				}
+
+				// Update the note slides
+				currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
+				upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
+				upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'next' }), '*' );
+
+			}
+
+			// Limit to max one state update per X ms
+			handleStateMessage = debounce( handleStateMessage, 200 );
+
+			/**
+			 * Forward keyboard events to the current slide window.
+			 * This enables keyboard events to work even if focus
+			 * isn't set on the current slide iframe.
+			 */
+			function setupKeyboard() {
+
+				document.addEventListener( 'keydown', function( event ) {
+					currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'triggerKey', args: [ event.keyCode ] }), '*' );
+				} );
+
+			}
+
+			/**
+			 * Creates the preview iframes.
+			 */
+			function setupIframes() {
+
+				var params = [
+					'receiver',
+					'progress=false',
+					'history=false',
+					'transition=none',
+					'backgroundTransition=none'
+				].join( '&' );
+
+				var currentURL = '/?' + params + '&postMessageEvents=true';
+				var upcomingURL = '/?' + params + '&controls=false';
+
+				currentSlide = document.createElement( 'iframe' );
+				currentSlide.setAttribute( 'width', 1280 );
+				currentSlide.setAttribute( 'height', 1024 );
+				currentSlide.setAttribute( 'src', currentURL );
+				document.querySelector( '#current-slide' ).appendChild( currentSlide );
+
+				upcomingSlide = document.createElement( 'iframe' );
+				upcomingSlide.setAttribute( 'width', 640 );
+				upcomingSlide.setAttribute( 'height', 512 );
+				upcomingSlide.setAttribute( 'src', upcomingURL );
+				document.querySelector( '#upcoming-slide' ).appendChild( upcomingSlide );
+
+			}
+
+			/**
+			 * Setup the notes UI.
+			 */
+			function setupNotes() {
+
+				notes = document.querySelector( '.speaker-controls-notes' );
+				notesValue = document.querySelector( '.speaker-controls-notes .value' );
+
+			}
+
+			/**
+			 * Create the timer and clock and start updating them
+			 * at an interval.
+			 */
+			function setupTimer() {
+
+				var start = new Date(),
+					timeEl = document.querySelector( '.speaker-controls-time' ),
+					clockEl = timeEl.querySelector( '.clock-value' ),
+					hoursEl = timeEl.querySelector( '.hours-value' ),
+					minutesEl = timeEl.querySelector( '.minutes-value' ),
+					secondsEl = timeEl.querySelector( '.seconds-value' );
+
+				function _updateTimer() {
+
+					var diff, hours, minutes, seconds,
+						now = new Date();
+
+					diff = now.getTime() - start.getTime();
+					hours = Math.floor( diff / ( 1000 * 60 * 60 ) );
+					minutes = Math.floor( ( diff / ( 1000 * 60 ) ) % 60 );
+					seconds = Math.floor( ( diff / 1000 ) % 60 );
+
+					clockEl.innerHTML = now.toLocaleTimeString( 'en-US', { hour12: true, hour: '2-digit', minute:'2-digit' } );
+					hoursEl.innerHTML = zeroPadInteger( hours );
+					hoursEl.className = hours > 0 ? '' : 'mute';
+					minutesEl.innerHTML = ':' + zeroPadInteger( minutes );
+					minutesEl.className = minutes > 0 ? '' : 'mute';
+					secondsEl.innerHTML = ':' + zeroPadInteger( seconds );
+
+				}
+
+				// Update once directly
+				_updateTimer();
+
+				// Then update every second
+				setInterval( _updateTimer, 1000 );
+
+				timeEl.addEventListener( 'click', function() {
+					start = new Date();
+					_updateTimer();
+					return false;
+				} );
+
+			}
+
+			function zeroPadInteger( num ) {
+
+				var str = '00' + parseInt( num );
+				return str.substring( str.length - 2 );
+
+			}
+
+			/**
+			 * Limits the frequency at which a function can be called.
+			 */
+			function debounce( fn, ms ) {
+
+				var lastTime = 0,
+					timeout;
+
+				return function() {
+
+					var args = arguments;
+					var context = this;
+
+					clearTimeout( timeout );
+
+					var timeSinceLastCall = Date.now() - lastTime;
+					if( timeSinceLastCall > ms ) {
+						fn.apply( context, args );
+						lastTime = Date.now();
+					}
+					else {
+						timeout = setTimeout( function() {
+							fn.apply( context, args );
+							lastTime = Date.now();
+						}, ms - timeSinceLastCall );
+					}
+
+				}
+
+			}
+
+		})();
+		</script>
+
+	</body>
+</html>
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