padmaEmbeds/example/example.js

273 lines
6.8 KiB
JavaScript

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 = [],
current = 0,
activeAudio,
timeout;
init()
function init() {
document.querySelectorAll('.slide').forEach(function(slide, idx) {
slides.push(new Slide(slide, idx))
})
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()
current = idx
if (timeout) {
clearTimeout(timeout)
timeout = null
}
timeout = setTimeout(next, Math.round(slides[current].duration) * 1000)
slides[old].stop()
slides[current].start()
}
function next() {
var idx = (current + 1) % slides.length
console.log(current, idx)
go(idx)
}
function previous() {
var idx = (current - 1) % slides.length
if (idx < 0) {
idx += slides.length
}
go(idx)
}
function load_urls(dataset) {
var urls = [], idx = 0
while (dataset['url_' + idx]) {
urls.push(dataset['url_' + idx])
idx += 1
}
return urls
}
window.addEventListener('blur', function(){
setTimeout(function(){
// using the 'setTimout' to let the event pass the run loop
if (document.activeElement instanceof HTMLIFrameElement) {
window.focus();
}
},0);
}, false);
function reset_active_audio() {
if (activeAudio) {
activeAudio.resetAudio()
}
}
document.addEventListener('keydown', function(event) {
if (event.key == 'ArrowRight') {
next()
event.preventDefault()
} else if (event.key == 'ArrowLeft') {
previous()
event.preventDefault()
}
}, false)