55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
Q = document.querySelector.bind(document);
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QA = document.querySelectorAll.bind(document);
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function text(msg) { return document.createTextNode(msg); }
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function clearNode(node) { while (node.firstChild) node.removeChild(node.firstChild); }
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function toTimestamp(seconds) {
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var seconds = Math.floor(seconds);
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var minutes = Math.floor(seconds/60);
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var seconds = seconds % 60;
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var hours = Math.floor(minutes/60);
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var minutes = minutes % 60;
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if (hours) {
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return `0${hours}:`.slice(-3) + `0${minutes}:`.slice(-3) + `0${seconds}`.slice(-2);
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}
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return `0${minutes}:`.slice(-3) + `0${seconds}`.slice(-2);
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}
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var cur_track_idx = 0;
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function getActiveTranscriptTrackIdx() {
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let textTracks = Q("video").textTracks;
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if (!textTracks.length) return;
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for (let i=0; i < textTracks.length; i++) {
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if (textTracks[i].mode == "showing") {
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cur_track_idx = i;
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return cur_track_idx;
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}
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}
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return cur_track_idx;
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}
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function getActiveTranscriptTrack() { return Q("video").textTracks[getActiveTranscriptTrackIdx()]; }
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function getDefaultTranscriptTrackIdx() {
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let textTracks = Q("video").textTracks;
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return textTracks.length - 1;
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}
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function doXhr(url, callback=null) {
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var xhr = new XMLHttpRequest();
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xhr.open("GET", url);
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xhr.onload = (e) => {
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let ok = xhr.status >= 200 && xhr.status < 300;
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if (ok) callback(e.currentTarget.response);
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else alert(`${xhr.responseURL} status code: ${xhr.status}`);
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}
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xhr.send();
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return xhr;
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}
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window.addEventListener('DOMContentLoaded', function() {
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cur_track_idx = getDefaultTranscriptTrackIdx();
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}); |