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							<!doctype html>
<html lang="en">
	<head>
		<meta charset="utf-8">

		<title>reveal.js - Slide Notes</title>

		<style>
			body {
				font-family: Helvetica;
				font-size: 18px;
			}

			#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;
				z-index: 2;
			}

			.overlay-element {
				height: 34px;
				line-height: 34px;
				padding: 0 10px;
				text-shadow: none;
				background: rgba( 220, 220, 220, 0.8 );
				color: #222;
				font-size: 14px;
			}

			.overlay-element.interactive:hover {
				background: rgba( 220, 220, 220, 1 );
			}

			#current-slide {
				position: absolute;
				width: 60%;
				height: 100%;
				top: 0;
				left: 0;
				padding-right: 0;
			}

			#upcoming-slide {
				position: absolute;
				width: 40%;
				height: 40%;
				right: 0;
				top: 0;
			}

			/* Speaker controls */
			#speaker-controls {
				position: absolute;
				top: 40%;
				right: 0;
				width: 40%;
				height: 60%;
				overflow: auto;
				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;
				}

			/* Layout selector */
			#speaker-layout {
				position: absolute;
				top: 10px;
				right: 10px;
				color: #222;
				z-index: 10;
			}
				#speaker-layout select {
					position: absolute;
					width: 100%;
					height: 100%;
					top: 0;
					left: 0;
					border: 0;
					box-shadow: 0;
					cursor: pointer;
					opacity: 0;

					font-size: 1em;
					background-color: transparent;

					-moz-appearance: none;
					-webkit-appearance: none;
					-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
				}

				#speaker-layout select:focus {
					outline: none;
					box-shadow: none;
				}

			.clear {
				clear: both;
			}

			/* Speaker layout: Wide */
			body[data-speaker-layout="wide"] #current-slide,
			body[data-speaker-layout="wide"] #upcoming-slide {
				width: 50%;
				height: 45%;
				padding: 6px;
			}

			body[data-speaker-layout="wide"] #current-slide {
				top: 0;
				left: 0;
			}

			body[data-speaker-layout="wide"] #upcoming-slide {
				top: 0;
				left: 50%;
			}

			body[data-speaker-layout="wide"] #speaker-controls {
				top: 45%;
				left: 0;
				width: 100%;
				height: 50%;
				font-size: 1.25em;
			}

			/* Speaker layout: Tall */
			body[data-speaker-layout="tall"] #current-slide,
			body[data-speaker-layout="tall"] #upcoming-slide {
				width: 45%;
				height: 50%;
				padding: 6px;
			}

			body[data-speaker-layout="tall"] #current-slide {
				top: 0;
				left: 0;
			}

			body[data-speaker-layout="tall"] #upcoming-slide {
				top: 50%;
				left: 0;
			}

			body[data-speaker-layout="tall"] #speaker-controls {
				padding-top: 40px;
				top: 0;
				left: 45%;
				width: 55%;
				height: 100%;
				font-size: 1.25em;
			}

			/* Speaker layout: Notes only */
			body[data-speaker-layout="notes-only"] #current-slide,
			body[data-speaker-layout="notes-only"] #upcoming-slide {
				display: none;
			}

			body[data-speaker-layout="notes-only"] #speaker-controls {
				padding-top: 40px;
				top: 0;
				left: 0;
				width: 100%;
				height: 100%;
				font-size: 1.25em;
			}

			@media screen and (max-width: 1080px) {
				body[data-speaker-layout="default"] #speaker-controls {
					font-size: 16px;
				}
			}

			@media screen and (max-width: 900px) {
				body[data-speaker-layout="default"] #speaker-controls {
					font-size: 14px;
				}
			}

			@media screen and (max-width: 800px) {
				body[data-speaker-layout="default"] #speaker-controls {
					font-size: 12px;
				}
			}

		</style>
	</head>

	<body>

		<div id="current-slide"></div>
		<div id="upcoming-slide"><span class="overlay-element 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>
		<div id="speaker-layout" class="overlay-element interactive">
			<span class="speaker-layout-label"></span>
			<select class="speaker-layout-dropdown"></select>
		</div>

		<script src="../../plugin/markdown/marked.js"></script>
		<script>

			(function() {

				var notes,
					notesValue,
					currentState,
					currentSlide,
					upcomingSlide,
					layoutLabel,
					layoutDropdown,
					connected = false;

				var SPEAKER_LAYOUTS = {
					'default': 'Default',
					'wide': 'Wide',
					'tall': 'Tall',
					'notes-only': 'Notes only'
				};

				setupLayout();

				window.addEventListener( 'message', function( event ) {

					var data = JSON.parse( event.data );

					// The overview mode is only useful to the reveal.js instance
					// where navigation occurs so we don't sync it
					if( data.state ) delete data.state.overview;

					// Messages sent by the notes plugin inside of the main window
					if( data && data.namespace === 'reveal-notes' ) {
						if( data.type === 'connect' ) {
							handleConnectMessage( data );
						}
						else if( data.type === 'state' ) {
							handleStateMessage( data );
						}
					}
					// Messages sent by the reveal.js inside of the current slide preview
					else if( data && data.namespace === 'reveal' ) {
						if( /ready/.test( data.eventName ) ) {
							// Send a message back to notify that the handshake is complete
							window.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'connected'} ), '*' );
						}
						else if( /slidechanged|fragmentshown|fragmenthidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {

							window.opener.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ]} ), '*' );

						}
					}

				} );

				/**
				 * Called when the main window is trying to establish a
				 * connection.
				 */
				function handleConnectMessage( data ) {

					if( connected === false ) {
						connected = true;

						setupIframes( data );
						setupKeyboard();
						setupNotes();
						setupTimer();
					}

				}

				/**
				 * 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' );
						notesValue.style.whiteSpace = data.whitespace;
						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( data ) {

					var params = [
						'receiver',
						'progress=false',
						'history=false',
						'transition=none',
						'autoSlide=0',
						'backgroundTransition=none'
					].join( '&' );

					var urlSeparator = /\?/.test(data.url) ? '&' : '?';
					var hash = '#/' + data.state.indexh + '/' + data.state.indexv;
					var currentURL = data.url + urlSeparator + params + '&postMessageEvents=true' + hash;
					var upcomingURL = data.url + urlSeparator + params + '&controls=false' + hash;

					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;
					} );

				}

				/**
				 * Sets up the speaker view layout and layout selector.
				 */
				function setupLayout() {

					layoutDropdown = document.querySelector( '.speaker-layout-dropdown' );
					layoutLabel = document.querySelector( '.speaker-layout-label' );

					// Render the list of available layouts
					for( var id in SPEAKER_LAYOUTS ) {
						var option = document.createElement( 'option' );
						option.setAttribute( 'value', id );
						option.textContent = SPEAKER_LAYOUTS[ id ];
						layoutDropdown.appendChild( option );
					}

					// Monitor the dropdown for changes
					layoutDropdown.addEventListener( 'change', function( event ) {

						setLayout( layoutDropdown.value );

					}, false );

					// Restore any currently persisted layout
					setLayout( getLayout() );

				}

				/**
				 * Sets a new speaker view layout. The layout is persisted
				 * in local storage.
				 */
				function setLayout( value ) {

					var title = SPEAKER_LAYOUTS[ value ];

					layoutLabel.innerHTML = 'Layout' + ( title ? ( ': ' + title ) : '' );
					layoutDropdown.value = value;

					document.body.setAttribute( 'data-speaker-layout', value );

					// Persist locally
					if( window.localStorage ) {
						window.localStorage.setItem( 'reveal-speaker-layout', value );
					}

				}

				/**
				 * Returns the ID of the most recently set speaker layout
				 * or our default layout if none has been set.
				 */
				function getLayout() {

					if( window.localStorage ) {
						var layout = window.localStorage.getItem( 'reveal-speaker-layout' );
						if( layout ) {
							return layout;
						}
					}

					// Default to the first record in the layouts hash
					for( var id in SPEAKER_LAYOUTS ) {
						return id;
					}

				}

				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>