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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
Hakim El Hattab
committed
<title>reveal.js - Slide Notes</title>
#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 {
top: 10px;
left: 10px;
font-weight: bold;
font-size: 14px;
color: rgba( 255, 255, 255, 0.9 );
}
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#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;
}
}
<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>
<script src="/socket.io/socket.io.js"></script>
<script src="/plugin/markdown/marked.js"></script>
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(function() {
var notes,
notesValue,
currentState,
currentSlide,
upcomingSlide,
connected = false;
var socket = io.connect( window.location.origin ),
socketId = '{{socketId}}';
socket.on( 'state', function( data ) {
// ignore data from sockets that aren't ours
if( data.socketId !== socketId ) { return; }
if( connected === false ) {
connected = true;
setupIframes( data );
setupKeyboard();
setupNotes();
setupTimer();
}
handleStateMessage( data );
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} );
/**
* 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 ] }), '*' );
} );
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/**
* Creates the preview iframes.
*/
function setupIframes( data ) {
var params = [
'receiver',
'progress=false',
'history=false',
'transition=none',
'backgroundTransition=none'
].join( '&' );
var hash = '#/' + data.state.indexh + '/' + data.state.indexv;
var currentURL = '/?' + params + hash;
var upcomingURL = '/?' + 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 );
Michael Kühnel
committed
}
/**
* Setup the notes UI.
*/
function setupNotes() {
notes = document.querySelector( '.speaker-controls-notes' );
notesValue = document.querySelector( '.speaker-controls-notes .value' );
Michael Kühnel
committed
}
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/**
* 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 );
}
}
}
})();