From 0740711fdeadb4765a2e1f495ed85b4846ef926f Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 23 Jun 2019 12:42:22 +0200
Subject: Began presentation

---
 presentation/plugin/notes-server/client.js  |  67 ++++
 presentation/plugin/notes-server/index.js   |  69 ++++
 presentation/plugin/notes-server/notes.html | 590 ++++++++++++++++++++++++++++
 3 files changed, 726 insertions(+)
 create mode 100644 presentation/plugin/notes-server/client.js
 create mode 100644 presentation/plugin/notes-server/index.js
 create mode 100644 presentation/plugin/notes-server/notes.html

(limited to 'presentation/plugin/notes-server')

diff --git a/presentation/plugin/notes-server/client.js b/presentation/plugin/notes-server/client.js
new file mode 100644
index 0000000..6a4d2e4
--- /dev/null
+++ b/presentation/plugin/notes-server/client.js
@@ -0,0 +1,67 @@
+(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/presentation/plugin/notes-server/index.js b/presentation/plugin/notes-server/index.js
new file mode 100644
index 0000000..61d0180
--- /dev/null
+++ b/presentation/plugin/notes-server/index.js
@@ -0,0 +1,69 @@
+var http = require('http');
+var express = require('express');
+var fs = require('fs');
+var io = require('socket.io');
+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) {
+        delete data.state.overview;
+        socket.broadcast.emit('statechanged', data);
+    });
+
+    socket.on('statechanged-speaker', function (data) {
+        delete data.state.overview;
+        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 in 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/presentation/plugin/notes-server/notes.html b/presentation/plugin/notes-server/notes.html
new file mode 100644
index 0000000..7a42256
--- /dev/null
+++ b/presentation/plugin/notes-server/notes.html
@@ -0,0 +1,590 @@
+<!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;
+        }
+
+    </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 class="overlay-element interactive" id="speaker-layout">
+    <span class="speaker-layout-label"></span>
+    <select class="speaker-layout-dropdown"></select>
+</div>
+
+<script src="/socket.io/socket.io.js"></script>
+<script src="/plugin/markdown/marked.js"></script>
+
+<script>
+    (function () {
+
+        var notes,
+            notesValue,
+            currentState,
+            currentSlide,
+            upcomingSlide,
+            layoutLabel,
+            layoutDropdown,
+            connected = false;
+
+        var socket = io.connect(window.location.origin),
+            socketId = '{{socketId}}';
+
+        var SPEAKER_LAYOUTS = {
+            'default': 'Default',
+            'wide': 'Wide',
+            'tall': 'Tall',
+            'notes-only': 'Notes only'
+        };
+
+        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);
+
+        });
+
+        setupLayout();
+
+        // 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;
+            });
+
+        }
+
+        /**
+         * 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>
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