Add playlist sidebar for videos in playlist, including autoplay
This commit is contained in:
James Taylor
@@ -37,7 +37,7 @@
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margin-bottom: 10px;
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background-color: var(--video-background-color);
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}
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.related-videos-outer{
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.side-videos{
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grid-row: 2 /span 3;
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width: 400px;
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}
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@@ -50,7 +50,7 @@
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width: 640px;
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grid-column: 2;
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}
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.related-videos-outer{
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.side-videos{
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grid-row: 1 /span 4;
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}
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{% endif %}
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@@ -183,20 +183,54 @@
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.comment{
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width:640px;
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}
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.related-videos-outer{
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.side-videos{
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grid-column: 4;
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max-width: 640px;
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}
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.related-videos-inner{
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padding-top: 10px;
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display: grid;
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grid-auto-rows: 90px;
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grid-row-gap: 10px;
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}
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.thumbnail-box{ /* overides rule in shared.css */
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height: 90px !important;
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width: 120px !important;
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.playlist{
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border-style: solid;
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border-width: 2px;
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border-color: lightgray;
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margin-bottom: 10px;
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}
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.playlist-header{
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background-color: var(--interface-color);
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padding: 3px;
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border-bottom-style: solid;
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border-bottom-width: 2px;
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border-bottom-color: lightgray;
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}
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.playlist-header h3{
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margin: 2px;
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}
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.playlist-metadata{
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list-style: none;
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padding: 0px;
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margin: 0px;
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}
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.playlist-metadata li{
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display: inline;
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margin: 2px;
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}
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.playlist-videos{
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height: 300px;
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overflow-y: scroll;
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display: grid;
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grid-auto-rows: 90px;
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grid-row-gap: 10px;
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padding-top: 10px;
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}
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.related-videos-inner{
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padding-top: 10px;
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display: grid;
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grid-auto-rows: 90px;
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grid-row-gap: 10px;
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}
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.thumbnail-box{ /* overides rule in shared.css */
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height: 90px !important;
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width: 120px !important;
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}
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/* Put related vids below videos when window is too small */
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/* 1100px instead of 1080 because W3C is full of idiots who include scrollbar width */
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@@ -204,7 +238,7 @@
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main{
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grid-template-columns: 1fr 640px 40px 1fr;
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}
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.related-videos-outer{
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.side-videos{
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margin-top: 10px;
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grid-column: 2;
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grid-row: 3;
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@@ -345,16 +379,165 @@
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</details>
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</div>
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{% if related_videos_mode != 0 %}
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<details class="related-videos-outer" {{'open' if related_videos_mode == 1 else ''}}>
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<summary>Related Videos</summary>
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<nav class="related-videos-inner">
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{% for info in related %}
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{{ common_elements.item(info, include_badges=false) }}
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{% endfor %}
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</nav>
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</details>
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{% endif %}
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<div class="side-videos">
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{% if playlist %}
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<div class="playlist">
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<div class="playlist-header">
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<a href="{{ playlist['url'] }}" title="{{ playlist['title'] }}"><h3>{{ playlist['title'] }}</h3></a>
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<ul class="playlist-metadata">
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<li>Autoplay: <input type="checkbox" id="autoplay-toggle"></li>
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{% if playlist['current_index'] is none %}
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<li>[Error!]/{{ playlist['video_count'] }}</li>
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{% else %}
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<li>{{ playlist['current_index']+1 }}/{{ playlist['video_count'] }}</li>
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{% endif %}
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<li><a href="{{ playlist['author_url'] }}" title="{{ playlist['author'] }}">{{ playlist['author'] }}</a></li>
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</ul>
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</div>
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<nav class="playlist-videos">
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{% for info in playlist['items'] %}
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{# non-lazy load for 5 videos surrounding current video #}
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{# for non-js browsers or old such that IntersectionObserver doesn't work #}
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{# -10 is sentinel to not load anything if there's no current_index for some reason #}
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{% if (playlist.get('current_index', -10) - loop.index0)|abs is lt(5) %}
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{{ common_elements.item(info, include_badges=false, lazy_load=false) }}
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{% else %}
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{{ common_elements.item(info, include_badges=false, lazy_load=true) }}
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{% endif %}
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{% endfor %}
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</nav>
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{% if playlist['current_index'] is not none %}
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<script>
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// from https://stackoverflow.com/a/6969486
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function escapeRegExp(string) {
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return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
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}
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var playability_error = {{ 'true' if playability_error else 'false' }};
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var playlist_id = {{ playlist['id']|tojson }};
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playlist_id = escapeRegExp(playlist_id);
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// read cookies on whether to autoplay thru playlist
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// pain in the ass:
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// https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie
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var cookieValue = document.cookie.replace(new RegExp(
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'(?:(?:^|.*;\\s*)autoplay_' + playlist_id + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
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var autoplayEnabled = 0;
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if(cookieValue.length === 0){
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autoplayEnabled = 0;
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} else {
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autoplayEnabled = Number(cookieValue);
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}
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// check the checkbox if autoplay is on
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var checkbox = document.querySelector('#autoplay-toggle');
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if(autoplayEnabled){
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checkbox.checked = true;
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}
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// listen for checkbox to turn autoplay on and off
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checkbox.addEventListener( 'change', function() {
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if(this.checked) {
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autoplayEnabled = 1;
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document.cookie = 'autoplay_' + playlist_id + '=1';
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} else {
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autoplayEnabled = 0;
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document.cookie = 'autoplay_' + playlist_id + '=0';
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}
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});
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if(!playability_error){
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// play the video if autoplay is on
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var vid = document.querySelector('video');
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if(autoplayEnabled){
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vid.play();
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}
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}
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var currentIndex = {{ playlist['current_index']|tojson }};
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{% if playlist['current_index']+1 == playlist['items']|length %}
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var nextVideoUrl = null;
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{% else %}
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var nextVideoUrl = {{ (playlist['items'][playlist['current_index']+1]['url'])|tojson }};
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{% endif %}
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var nextVideoDelay = 1000;
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// scroll playlist to proper position
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var pl = document.querySelector('.playlist-videos');
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// item height + gap == 100
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pl.scrollTop = 100*currentIndex;
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// go to next video when video ends
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// https://stackoverflow.com/a/2880950
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if(nextVideoUrl){
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if(playability_error){
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videoEnded();
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} else {
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vid.addEventListener('ended', videoEnded, false);
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}
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function nextVideo(){
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if(autoplayEnabled){
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window.location.href = nextVideoUrl;
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}
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}
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function videoEnded(e) {
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window.setTimeout(nextVideo, nextVideoDelay);
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}
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}
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</script>
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{% endif %}
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{% if playlist['id'] is not none %}
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<script>
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// lazy load playlist images
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// copied almost verbatim from
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// https://css-tricks.com/tips-for-rolling-your-own-lazy-loading/
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// IntersectionObserver isn't supported in pre-quantum
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// firefox versions, but the alternative of making it
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// manually is a performance drain, so oh well
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var observer = new IntersectionObserver(lazyLoad, {
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// where in relation to the edge of the viewport, we are observing
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rootMargin: "100px",
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// how much of the element needs to have intersected
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// in order to fire our loading function
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threshold: 1.0
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});
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function lazyLoad(elements) {
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elements.forEach(item => {
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if (item.intersectionRatio > 0) {
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// set the src attribute to trigger a load
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item.target.src = item.target.dataset.src;
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// stop observing this element. Our work here is done!
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observer.unobserve(item.target);
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};
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});
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};
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// Tell our observer to observe all img elements with a "lazy" class
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var lazyImages = document.querySelectorAll('img.lazy');
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lazyImages.forEach(img => {
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observer.observe(img);
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});
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</script>
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{% endif %}
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</div>
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{% endif %}
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{% if related_videos_mode != 0 %}
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<details class="related-videos-outer" {{'open' if related_videos_mode == 1 else ''}}>
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<summary>Related Videos</summary>
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<nav class="related-videos-inner">
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{% for info in related %}
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{{ common_elements.item(info, include_badges=false) }}
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{% endfor %}
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</nav>
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</details>
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{% endif %}
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</div>
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{% if comments_mode != 0 %}
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{% if comments_disabled %}
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