<!--
NOTE: You need to build the notes plugin after making changes to this file.
-->
<html lang="en">
<head>
<meta charset="utf-8" />
<title>reveal.js - Speaker View</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;
}
#connection-status {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 20;
padding: 30% 20% 20% 20%;
font-size: 18px;
color: #222;
background: #fff;
text-align: center;
box-sizing: border-box;
line-height: 1.4;
}
.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-pace .label,
.speaker-controls-notes .label {
text-transform: uppercase;
font-weight: normal;
font-size: 0.66em;
color: #666;
margin: 0;
}
.speaker-controls-time,
.speaker-controls-pace {
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%;
}
.speaker-controls-time .timer,
.speaker-controls-time .clock,
.speaker-controls-time .pacing .hours-value,
.speaker-controls-time .pacing .minutes-value,
.speaker-controls-time .pacing .seconds-value {
font-size: 1.9em;
}
.speaker-controls-time .timer {
float: left;
}
.speaker-controls-time .clock {
float: right;
text-align: right;
}
.speaker-controls-time span.mute {
opacity: 0.3;
}
.speaker-controls-time .pacing-title {
margin-top: 5px;
}
.speaker-controls-time .pacing.ahead {
color: blue;
}
.speaker-controls-time .pacing.on-track {
color: green;
}
.speaker-controls-time .pacing.behind {
color: red;
}
.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="connection-status">Loading speaker view...</div>
<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>
<h4 class="label pacing-title" style="display: none">
Pacing – Time to finish current slide
</h4>
<div class="pacing" style="display: none">
<span class="hours-value">00</span
><span class="minutes-value">:00</span
><span class="seconds-value">:00</span>
</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>
(function () {
var notes,
notesValue,
currentState,
currentSlide,
upcomingSlide,
layoutLabel,
layoutDropdown,
pendingCalls = {},
lastRevealApiCallId = 0,
connected = false;
var connectionStatus = document.querySelector("#connection-status");
var SPEAKER_LAYOUTS = {
default: "Default",
wide: "Wide",
tall: "Tall",
"notes-only": "Notes only",
};
setupLayout();
let openerOrigin;
try {
openerOrigin = window.opener.location.origin;
} catch (error) {
console.warn(error);
}
// In order to prevent XSS, the speaker view will only run if its
// opener has the same origin as itself
if (window.location.origin !== openerOrigin) {
connectionStatus.innerHTML =
"Cross origin error.<br>The speaker window can only be opened from the same origin.";
return;
}
var connectionTimeout = setTimeout(function () {
connectionStatus.innerHTML =
"Error connecting to main window.<br>Please try closing and reopening the speaker view.";
}, 5000);
window.addEventListener("message", function (event) {
clearTimeout(connectionTimeout);
connectionStatus.style.display = "none";
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);
} else if (data.type === "return") {
pendingCalls[data.callId](data.result);
delete pendingCalls[data.callId];
}
}
// 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)
) {
dispatchStateToMainWindow(data.state);
}
}
});
/**
* Updates the presentation in the main window to match the state
* of the presentation in the notes window.
*/
const dispatchStateToMainWindow = debounce((state) => {
window.opener.postMessage(
JSON.stringify({ method: "setState", args: [state] }),
"*"
);
}, 500);
/**
* Asynchronously calls the Reveal.js API of the main frame.
*/
function callRevealApi(methodName, methodArguments, callback) {
var callId = ++lastRevealApiCallId;
pendingCalls[callId] = callback;
window.opener.postMessage(
JSON.stringify({
namespace: "reveal-notes",
type: "call",
callId: callId,
methodName: methodName,
arguments: methodArguments,
}),
"*"
);
}
/**
* Called when the main window is trying to establish a
* connection.
*/
function handleConnectMessage(data) {
if (connected === false) {
connected = true;
setupIframes(data);
setupKeyboard();
setupNotes();
setupTimer();
setupHeartbeat();
}
}
/**
* 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.
*
* Block F5 default handling, it reloads and disconnects
* the speaker notes window.
*/
function setupKeyboard() {
document.addEventListener("keydown", function (event) {
if (
event.keyCode === 116 ||
(event.metaKey && event.keyCode === 82)
) {
event.preventDefault();
return false;
}
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");
}
/**
* We send out a heartbeat at all times to ensure we can
* reconnect with the main presentation window after reloads.
*/
function setupHeartbeat() {
setInterval(() => {
window.opener.postMessage(
JSON.stringify({ namespace: "reveal-notes", type: "heartbeat" }),
"*"
);
}, 1000);
}
function getTimings(callback) {
callRevealApi("getSlidesAttributes", [], function (slideAttributes) {
callRevealApi("getConfig", [], function (config) {
var totalTime = config.totalTime;
var minTimePerSlide = config.minimumTimePerSlide || 0;
var defaultTiming = config.defaultTiming;
if (defaultTiming == null && totalTime == null) {
callback(null);
return;
}
// Setting totalTime overrides defaultTiming
if (totalTime) {
defaultTiming = 0;
}
var timings = [];
for (var i in slideAttributes) {
var slide = slideAttributes[i];
var timing = defaultTiming;
if (slide.hasOwnProperty("data-timing")) {
var t = slide["data-timing"];
timing = parseInt(t);
if (isNaN(timing)) {
console.warn(
"Could not parse timing '" +
t +
"' of slide " +
i +
"; using default of " +
defaultTiming
);
timing = defaultTiming;
}
}
timings.push(timing);
}
if (totalTime) {
// After we've allocated time to individual slides, we summarize it and
// subtract it from the total time
var remainingTime =
totalTime -
timings.reduce(function (a, b) {
return a + b;
}, 0);
// The remaining time is divided by the number of slides that have 0 seconds
// allocated at the moment, giving the average time-per-slide on the remaining slides
var remainingSlides = timings.filter(function (x) {
return x == 0;
}).length;
var timePerSlide = Math.round(
remainingTime / remainingSlides,
0
);
// And now we replace every zero-value timing with that average
timings = timings.map(function (x) {
return x == 0 ? timePerSlide : x;
});
}
var slidesUnderMinimum = timings.filter(function (x) {
return x < minTimePerSlide;
}).length;
if (slidesUnderMinimum) {
message =
"The pacing time for " +
slidesUnderMinimum +
" slide(s) is under the configured minimum of " +
minTimePerSlide +
" seconds. Check the data-timing attribute on individual slides, or consider increasing the totalTime or minimumTimePerSlide configuration options (or removing some slides).";
alert(message);
}
callback(timings);
});
});
}
/**
* Return the number of seconds allocated for presenting
* all slides up to and including this one.
*/
function getTimeAllocated(timings, callback) {
callRevealApi("getSlidePastCount", [], function (currentSlide) {
var allocated = 0;
for (var i in timings.slice(0, currentSlide + 1)) {
allocated += timings[i];
}
callback(allocated);
});
}
/**
* 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"),
pacingTitleEl = timeEl.querySelector(".pacing-title"),
pacingEl = timeEl.querySelector(".pacing"),
pacingHoursEl = pacingEl.querySelector(".hours-value"),
pacingMinutesEl = pacingEl.querySelector(".minutes-value"),
pacingSecondsEl = pacingEl.querySelector(".seconds-value");
var timings = null;
getTimings(function (_timings) {
timings = _timings;
if (_timings !== null) {
pacingTitleEl.style.removeProperty("display");
pacingEl.style.removeProperty("display");
}
// Update once directly
_updateTimer();
// Then update every second
setInterval(_updateTimer, 1000);
});
function _resetTimer() {
if (timings == null) {
start = new Date();
_updateTimer();
} else {
// Reset timer to beginning of current slide
getTimeAllocated(timings, function (slideEndTimingSeconds) {
var slideEndTiming = slideEndTimingSeconds * 1000;
callRevealApi("getSlidePastCount", [], function (currentSlide) {
var currentSlideTiming = timings[currentSlide] * 1000;
var previousSlidesTiming =
slideEndTiming - currentSlideTiming;
var now = new Date();
start = new Date(now.getTime() - previousSlidesTiming);
_updateTimer();
});
});
}
}
timeEl.addEventListener("click", function () {
_resetTimer();
return false;
});
function _displayTime(hrEl, minEl, secEl, time) {
var sign = Math.sign(time) == -1 ? "-" : "";
time = Math.abs(Math.round(time / 1000));
var seconds = time % 60;
var minutes = Math.floor(time / 60) % 60;
var hours = Math.floor(time / (60 * 60));
hrEl.innerHTML = sign + zeroPadInteger(hours);
if (hours == 0) {
hrEl.classList.add("mute");
} else {
hrEl.classList.remove("mute");
}
minEl.innerHTML = ":" + zeroPadInteger(minutes);
if (hours == 0 && minutes == 0) {
minEl.classList.add("mute");
} else {
minEl.classList.remove("mute");
}
secEl.innerHTML = ":" + zeroPadInteger(seconds);
}
function _updateTimer() {
var diff,
hours,
minutes,
seconds,
now = new Date();
diff = now.getTime() - start.getTime();
clockEl.innerHTML = now.toLocaleTimeString("en-US", {
hour12: true,
hour: "2-digit",
minute: "2-digit",
});
_displayTime(hoursEl, minutesEl, secondsEl, diff);
if (timings !== null) {
_updatePacing(diff);
}
}
function _updatePacing(diff) {
getTimeAllocated(timings, function (slideEndTimingSeconds) {
var slideEndTiming = slideEndTimingSeconds * 1000;
callRevealApi("getSlidePastCount", [], function (currentSlide) {
var currentSlideTiming = timings[currentSlide] * 1000;
var timeLeftCurrentSlide = slideEndTiming - diff;
if (timeLeftCurrentSlide < 0) {
pacingEl.className = "pacing behind";
} else if (timeLeftCurrentSlide < currentSlideTiming) {
pacingEl.className = "pacing on-track";
} else {
pacingEl.className = "pacing ahead";
}
_displayTime(
pacingHoursEl,
pacingMinutesEl,
pacingSecondsEl,
timeLeftCurrentSlide
);
});
});
}
}
/**
* 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 (supportsLocalStorage()) {
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 (supportsLocalStorage()) {
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 supportsLocalStorage() {
try {
localStorage.setItem("test", "test");
localStorage.removeItem("test");
return true;
} catch (e) {
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>