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fd5355860a
When we start a new load, all previous data fetching from the previous listener and all state changing applied to track element should be ignored. Therefore, we add a new method `Cancel()` which owner of the listener should call when we would like to discard current listener. Differential Revision: https://phabricator.services.mozilla.com/D36407 --HG-- extra : moz-landing-system : lando
67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const {WebVTT} = ChromeUtils.import("resource://gre/modules/vtt.jsm");
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function WebVTTParserWrapper()
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{
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// Nothing
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}
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WebVTTParserWrapper.prototype =
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{
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loadParser: function(window)
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{
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this.parser = new WebVTT.Parser(window, new TextDecoder("utf8"));
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},
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parse: function(data)
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{
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// We can safely translate the string data to a Uint8Array as we are
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// guaranteed character codes only from \u0000 => \u00ff
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var buffer = new Uint8Array(data.length);
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for (var i = 0; i < data.length; i++) {
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buffer[i] = data.charCodeAt(i);
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}
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this.parser.parse(buffer);
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},
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flush: function()
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{
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this.parser.flush();
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},
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watch: function(callback)
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{
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this.parser.oncue = callback.onCue;
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this.parser.onregion = callback.onRegion;
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this.parser.onparsingerror = function(e) {
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// Passing the just the error code back is enough for our needs.
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callback.onParsingError(("code" in e) ? e.code : -1);
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};
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},
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cancel: function() {
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this.parser.oncue = null;
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this.parser.onregion = null;
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this.parser.onparsingerror = null;
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},
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convertCueToDOMTree: function(window, cue)
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{
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return WebVTT.convertCueToDOMTree(window, cue.text);
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},
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processCues: function(window, cues, overlay, controls)
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{
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WebVTT.processCues(window, cues, overlay, controls);
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},
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classDescription: "Wrapper for the JS WebVTT implementation (vtt.js)",
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QueryInterface: ChromeUtils.generateQI([Ci.nsIWebVTTParserWrapper]),
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};
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var EXPORTED_SYMBOLS = ["WebVTTParserWrapper"];
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