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6 changed files with 193 additions and 328 deletions

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@ -57,5 +57,4 @@ body {
.audio iframe {
height: 0;
border: 0;
}

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@ -1,253 +1,40 @@
class Slide {
constructor(slide, idx) {
this.isAudioLoaded = this.isVideoLoaded = false
this.el = slide
this.idx = idx
this.duration = slide.dataset.duration
const video = slide.querySelector('.video')
if (video) {
this.video = load_urls(video.dataset)
if (this.video.length > 1 || this.video[0].includes('document')) {
this.isDocument = true
}
this.videoVolume = video.dataset.volume ? parseFloat(video.dataset.volume) : 1
this.videoContainer = video
if (this.video.length > 1) {
this.zooms = this.video.map(url => url.split('/').pop().split('#')[0].split(',').map(a => Math.round(a)))
}
}
const audio = slide.querySelector('.audio')
if (audio) {
this.audio = audio.dataset.url // audio does not need to be an array
this.audioVolume = audio.dataset.volume ? parseFloat(audio.dataset.volume) : 1
this.audioContainer = audio
this.audioContinue = !!audio.dataset.continue
}
this.initEmbeds()
return this
}
initEmbeds() {
if (this.video) {
const videoEmbed = this.videoEmbed = new PandoraEmbed({
id: 'slide-' + this.idx,
url: this.video[0],
container: this.videoContainer
})
videoEmbed.on('init', () => {
if (this.isDocument) {
this.isVideoLoaded = true
}
})
videoEmbed.on('loaded', () => {
console.log('loaded called on embed')
this.isVideoLoaded = true
})
videoEmbed.on('playing', (positionData) => {
if (!this.videoStart) {
this.videoStart = positionData.position
}
})
}
if (this.audio) {
const audioEmbed = this.audioEmbed = new PandoraEmbed({
id: 'audio-' + this.idx,
url: this.audio,
container: this.audioContainer
})
audioEmbed.on('loaded', () => {
console.log('loaded called on audio embed')
this.isAudioLoaded = true
})
audioEmbed.on('playing', (positionData) => {
if (!this.audioStart) {
this.audioStart = positionData.position
}
})
}
return this;
}
isReady() {
console.log('isReady called');
if (this.video && this.audio) {
return this.isVideoLoaded && this.isAudioLoaded
} else if (this.video) {
return this.isVideoLoaded
} else if (this.audio) {
return this.isAudioLoaded
} else {
return true
}
}
sendToBack() {
this.el.style.zIndex = 0
return this
}
bringToFront() {
this.el.style.zIndex = 10
return this
}
start() {
console.log('called start', this.isReady())
if (this.zooms) {
this.startZoom()
} else if (this.video && this.video.length) {
this.startVideo()
}
if (this.audioContainer) { // if there is an audio container, we always stop current audio
reset_active_audio()
}
if (this.audio) {
this.startAudio()
}
return this
}
stop() {
if (this.zooms) {
this.resetZoom()
} else if (this.video && this.video.length) {
this.resetVideo()
}
if (this.audio && !this.audioContinue) {
this.resetAudio()
}
return this
}
startZoom() {
for (var i=1; i<this.zooms.length; i++) {
this.zoomTimeouts = [];
((j) => {
this.zoomTimeouts.push(setTimeout(() => {
this.videoEmbed.postMessage('options', {
'area': this.zooms[j]
})
}, Math.round(1000 * (this.duration / this.zooms.length) * j)))
})(i);
}
return this
}
startVideo() {
this.videoEmbed.postMessage('options', {
'paused': false,
'volume': this.videoVolume
})
return this
}
startAudio() {
this.audioEmbed.postMessage('options', {
'paused': false,
'volume': this.audioVolume
})
activeAudio = this
return this
}
resetZoom() {
this.zoomTimeouts.forEach(timeout => clearTimeout(timeout))
this.videoEmbed.postMessage('options', {
'area': this.zooms[0]
})
return this
}
resetVideo() {
this.videoEmbed.postMessage('options', {
'paused': true,
'position': this.start || 0
})
return this
}
resetAudio() {
this.audioEmbed.postMessage('options', {
'paused': true,
'position': 0 //FIXME: figure correct audio reset
})
activeAudio = null;
return this
}
}
var slides = [],
slideData = [],
current = 0,
activeAudio,
timeout;
let textbUrl = new URLSearchParams(window.location.search).get('textb') || 'https://textb.org/r/housingplaylist2/'
// use raw version of page
textbUrl = textbUrl.replace('/t/', '/r/')
if (!textbUrl.endsWith('/')) textbUrl += '/'
fetch(textbUrl)
.then(response => response.text())
.then(loadYaml)
.then(init)
.catch(err => {
console.log('error', err)
alert('error loading YAML')
})
function loadYaml(txt) {
const html = txt.split('\n\n')
.filter(chunk => chunk.trim())
.map(chunk => {
const obj = jsyaml.load(chunk)
return obj
})
.map(jsonToHTML)
.join('')
document.body.innerHTML = `
<div class="base"></div>
${html}
`
return true
}
init()
function init() {
document.querySelectorAll('.slide').forEach(function(slide, idx) {
slides.push(new Slide(slide, idx))
document.querySelectorAll('.slide').forEach(function(slide) {
slides.push(slide)
var data = slideData[slides.length - 1] = load_slide(slide);
data.idx = slides.length - 1;
if (data.video && data.video.length) {
data.embed = init_embed(data)
}
if (data.audio) {
data.audioEmbed = init_audio_embed(data)
}
})
go(0)
}
function go(idx) {
if (!slides[idx].isReady()) {
console.log('slide not ready');
return setTimeout(() => {
go(idx)
}, 250)
}
var old = current
slides[current].sendToBack()
slides[idx].bringToFront()
slides[current].style.zIndex = 0
slides[idx].style.zIndex = 10
current = idx
if (timeout) {
clearTimeout(timeout)
timeout = null
}
timeout = setTimeout(next, Math.round(slides[current].duration) * 1000)
timeout = setTimeout(next, Math.round(slides[current].dataset.duration) * 1000)
slides[old].stop()
slides[current].start()
stop(old)
start(current)
}
function next() {
@ -264,6 +51,34 @@ function previous() {
go(idx)
}
function start(idx) {
var data = slideData[idx]
console.log('start', current, data)
if (data.zooms) {
start_zoom(data)
} else if (data.video && data.video.length) {
start_video(data)
}
if (data.audioContainer) { // if there is an audio container, we always stop current audio
reset_active_audio();
}
if (data.audio) {
start_audio(data)
}
}
function stop(idx) {
var data = slideData[idx]
console.log(current, data)
if (data.zooms) {
reset_zoom(data)
} else if (data.video && data.video.length) {
reset_video(data)
}
if (data.audio && !data.audioContinue) {
reset_audio(data)
}
}
function load_urls(dataset) {
var urls = [], idx = 0
@ -274,6 +89,56 @@ function load_urls(dataset) {
return urls
}
function load_slide(slide) {
var data = {}
data.duration = slide.dataset.duration
var video = slide.querySelector('.video')
if (video) {
data.video = load_urls(video.dataset)
data.videoVolume = video.dataset.volume ? parseFloat(video.dataset.volume) : 1
data.container = video
// assumes documents if length > 1
if (data.video.length > 1) {
data.zooms = data.video.map(url => url.split('/').pop().split('#')[0].split(',').map(a => Math.round(a)))
}
}
var audio = slide.querySelector('.audio')
if (audio) {
data.audio = audio.dataset.url // audio does not need to be an array
data.audioVolume = audio.dataset.volume ? parseFloat(audio.dataset.volume) : 1
data.audioContainer = audio
console.log('continue', audio.dataset.continue)
data.audioContinue = !!audio.dataset.continue
}
return data
}
function init_embed(data) {
var embed = window.currentEmbed = new PandoraEmbed({
id: 'slide-' + data.idx,
url: data.video[0],
container: data.container
});
embed.on('init', function(data) {
});
embed.on('playing', function(positionData) {
if (!slideData[data.idx].start) {
slideData[data.idx].start = positionData.position;
}
});
return embed;
}
function init_audio_embed(data) {
return new PandoraEmbed({
id: 'slide-audio-' + data.idx,
url: data.audio,
container: data.audioContainer
})
}
window.addEventListener('blur', function(){
setTimeout(function(){
@ -285,9 +150,62 @@ window.addEventListener('blur', function(){
}, false);
function reset_zoom(data) {
data.zoomTimeouts.forEach(timeout => clearTimeout(timeout))
data.embed.postMessage('options', {
'area': data.zooms[0]
})
}
function start_zoom(data) {
// console.log('start zoon', Math.round(1000 * data.duration / 2))
for (var i=1; i<data.zooms.length; i++) {
data.zoomTimeouts = [];
(function(j) {
data.zoomTimeouts.push(setTimeout(function() {
data.embed.postMessage('options', {
'area': data.zooms[j]
})
}, Math.round(1000 * (data.duration / data.zooms.length) * j)))
})(i)
}
}
function start_video(data) {
data.embed.postMessage('options', {
'paused': false,
'volume': data.videoVolume
})
}
function start_audio(data) {
data.audioEmbed.postMessage('options', {
'paused': false,
'volume': data.audioVolume
})
activeAudio = data
}
function reset_video(data) {
data.embed.postMessage('options', {
'paused': true,
'position': data.start || 0
})
}
function reset_audio(data) {
data.audioEmbed.postMessage('options', {
'paused': true,
'position': 0 //FIXME: figure correct audio reset
})
activeAudio = null;
}
function reset_active_audio() {
if (activeAudio) {
activeAudio.resetAudio()
reset_audio(activeAudio)
}
}

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@ -1,9 +1,48 @@
<meta charset="utf-8">
<script src="../lib/PandoraEmbed.js"></script>
<link type="text/css" href="example.css" rel="stylesheet" />
<div class="base">
</div>
<div class="slide" data-duration="10">
<div class="title">FROM JANTA COLONY TO JANTA COLONY</div>
</div>
<div class="slide" data-duration="10">
<div class="title">
At first, three stories from the year 1950 in Bombay
</div>
<div class="audio" data-volume="0.4" data-continue="true" data-url="https://pad.ma/BVF/editor/F#embed"></div>
</div>
<div class="slide" data-duration="10">
<div class="title">
ONE
</div>
</div>
<div class="slide" data-duration="60">
<div class="title">
The "rationing" of living space
</div>
<div class="video"
data-url_0="https://pad.ma/documents/AFL/0,0,6580,3763#embed"
data-url_1="https://pad.ma/documents/AFL/1568,1461,3352,2401#embed"
></div>
<div class="audio"></div> <!-- signal to stop playing audio -->
</div>
<div class="slide" data-duration="10">
<div class="title">
The Times of India on 23rd July
</div>
<div class="video"
data-url_0="https://pad.ma/documents/ADZ/0,0,6554,5409#embed",
data-url_1="https://pad.ma/documents/ADZ/3836,2088,6401,3440#embed"
></div>
</div>
<div class="slide" data-duration="15">
<div class="video" data-volume="0.9" data-url_0="https://pad.ma/BVF/editor/F#embed"
></div>
<!-- YAML parser from: https://github.com/nodeca/js-yaml-->
<script src="../lib/js-yaml.min.js"></script>
<script src="../lib/json-to-html.js"></script>
</div>
<div class="slide" data-duration="15">
<div class="video" data-url_0="https://indiancine.ma/AKDP/editor/BFR#embed"
></div>
</div>
<script src="example.js"></script>

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@ -4,7 +4,7 @@
<title>Subscribe to events from pad.ma iframe embed</title>
</head>
<body>
<iframe width="640" height="360" src="https://pad.ma/BVF/editor/F#embed" frameborder="0" allowfullscreen id="padembed"></iframe>
<iframe width="640" height="360" src="http://pandora/documents/I/649,254,1289,723#embed" frameborder="0" allowfullscreen id="padembed"></iframe>
<button id="setUrl">
Set Iframe URL
</button>

1
lib/js-yaml.min.js vendored

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@ -1,90 +0,0 @@
(function() {
window.jsonToHTML = getHTML
function getHTML(slideData) {
let video = audio = ''
if (!slideData.title) slideData.title = ''
title = `
<div class="title">
${slideData.title}
</div>
`
if (slideData.video) {
video = getVideoHtml(slideData.video)
}
if (slideData.audio) {
audio = getAudioHtml(slideData.audio)
}
const duration = `data-duration="${slideData.duration ? slideData.duration : 5}"`
return `
<div class="slide" ${duration}>
${title}
${video}
${audio}
</div>
`
}
function getVideoHtml(videoData) {
let urls = []
let volume = ''
if (typeof(videoData) === 'string') {
urls.push(videoData)
} else { // video is an object
if (videoData.hasOwnProperty('url')) {
urls.push(videoData.url)
} else if (videoData.hasOwnProperty('zoom')) {
urls = videoData.zoom
}
if (videoData.volume) {
volume = `data-volume="${videoData.volume}"`
}
}
const urlsHtml = urls.map((url, index) => {
return `data-url_${index}="${makeEmbed(url)}"`
}).join('\n')
return `
<div class="video" ${urlsHtml} ${volume}> </div>
`
}
function getAudioHtml(audioData) {
let url = continueStr = volume = ''
// short circuit to return an empty div if audioData is null or not an object
// this is useful for user to specify empty audio track to cause existing
// audio to pause
if (!audioData || !(typeof(audioData === 'object'))) {
return `<div class="audio></div>`
}
if (audioData.url) {
url = `data-url="${makeEmbed(audioData.url)}"`
}
if (audioData.volume) {
volume = `data-volume="${audioData.volume}"`
}
if (audioData['continue']) {
continueStr = `data-continue="true"`
}
return `
<div class="audio" ${url} ${volume} ${continueStr}></div>
`
}
function makeEmbed(url) {
if (!url.endsWith('#embed')) {
return `${url}#embed`
} else {
return url
}
}
})();