121 lines
3.5 KiB
JavaScript
121 lines
3.5 KiB
JavaScript
var cache = cache || {}
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var layer = 'descriptions'
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var baseURL = 'https://pad.ma'
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var imageResolution = 480
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let lastKnownScrollPosition = 0
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let ticking = false;
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async function pandoraAPI(action, data) {
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var url = baseURL + '/api/'
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//var url = '/pandoraAPI/'
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var key = JSON.stringify([action, data])
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if (!cache[key]) {
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var response = await fetch(url, {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({
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action: action,
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data: data
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})
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})
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cache[key] = await response.json()
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}
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return cache[key]
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}
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function updatePlayerPosition(video, lastKnownScrollPosition) {
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console.log('update', lastKnownScrollPosition)
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video.style.top = lastKnownScrollPosition + 'px'
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video.style.display = 'block';
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}
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function updatePlayer(video, frame, currentTime) {
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var rect = frame.getBoundingClientRect();
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video.style.opacity = 0
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console.log('update player', rect)
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video.style.top = (rect.top + window.scrollY) + 'px'
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video.style.display = 'block';
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//video.poster = frame.querySelector('img').src
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video.currentTime = currentTime
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video.controls = true
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video.play()
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video.style.opacity = 1
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}
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function isElementInViewport (el) {
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var rect = el.getBoundingClientRect();
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return (
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rect.top >= 0 &&
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rect.left >= 0 &&
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rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /* or $(window).height() */
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rect.right <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
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);
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}
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function onVisibilityChange(el, callback) {
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var old_visible;
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return function () {
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var visible = isElementInViewport(el);
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if (visible != old_visible) {
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old_visible = visible;
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if (typeof callback == 'function') {
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callback(visible);
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}
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}
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}
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}
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pandoraAPI('get', {id: film.id, keys: ['id', 'title', 'layers']}).then(response => {
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var ascroll = document.querySelector('#ascroll')
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var loaded = false
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var video = document.createElement('video')
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video.classList.add('player')
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video.muted = true
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video.src = `${baseURL}/${film.id}/480p.webm`
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ascroll.appendChild(video)
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var h1 = document.createElement('h1')
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h1.innerHTML = response.data.title
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ascroll.appendChild(h1)
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response.data.layers[layer].forEach(annotation => {
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var div = document.createElement('div')
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div.classList.add('annotation')
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div.innerHTML = `
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<div class="frame"><img src="${baseURL}/${annotation.id.split('/')[0]}/${imageResolution}p${annotation.in}.jpg"></div>
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<div class="text">${annotation.value}</div>
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`
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ascroll.appendChild(div)
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var frame = div.querySelector('.frame')
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document.addEventListener('scroll', onVisibilityChange(div.querySelector('.frame'), function(visible) {
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if (loaded && visible)
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updatePlayer(video, frame, annotation['in'])
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}))
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})
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loaded = true
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let frame = ascroll.querySelector('.annotation .frame')
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if (frame) {
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updatePlayer(video, frame, 0)
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}
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/*
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document.addEventListener('scroll', function(e) {
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lastKnownScrollPosition = window.scrollY;
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if (!ticking) {
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window.requestAnimationFrame(function() {
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updatePlayerPosition(video, lastKnownScrollPosition);
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ticking = false;
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});
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ticking = true;
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}
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})
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*/
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})
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