112 lines
3.3 KiB
JavaScript
112 lines
3.3 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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callback(e.currentTarget.response);
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}
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xhr.send();
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return xhr;
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}
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// https://stackoverflow.com/a/30810322
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function copyTextToClipboard(text) {
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var textArea = document.createElement("textarea");
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//
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// *** This styling is an extra step which is likely not required. ***
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//
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// Why is it here? To ensure:
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// 1. the element is able to have focus and selection.
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// 2. if element was to flash render it has minimal visual impact.
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// 3. less flakyness with selection and copying which **might** occur if
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// the textarea element is not visible.
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//
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// The likelihood is the element won't even render, not even a
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// flash, so some of these are just precautions. However in
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// Internet Explorer the element is visible whilst the popup
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// box asking the user for permission for the web page to
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// copy to the clipboard.
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//
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// Place in top-left corner of screen regardless of scroll position.
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textArea.style.position = 'fixed';
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textArea.style.top = 0;
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textArea.style.left = 0;
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// Ensure it has a small width and height. Setting to 1px / 1em
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// doesn't work as this gives a negative w/h on some browsers.
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textArea.style.width = '2em';
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textArea.style.height = '2em';
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// We don't need padding, reducing the size if it does flash render.
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textArea.style.padding = 0;
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// Clean up any borders.
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textArea.style.border = 'none';
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textArea.style.outline = 'none';
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textArea.style.boxShadow = 'none';
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// Avoid flash of white box if rendered for any reason.
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textArea.style.background = 'transparent';
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textArea.value = text;
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document.body.appendChild(textArea);
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textArea.focus();
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textArea.select();
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try {
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var successful = document.execCommand('copy');
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var msg = successful ? 'successful' : 'unsuccessful';
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console.log('Copying text command was ' + msg);
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} catch (err) {
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console.log('Oops, unable to copy');
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}
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document.body.removeChild(textArea);
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}
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window.addEventListener('DOMContentLoaded', function() {
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cur_track_idx = getDefaultTranscriptTrackIdx();
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}); |