content/media/webvtt/WebVTTParserWrapper.js@97036ab72558
content/media/webvtt/WebVTTParserWrapper.js
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
6 Components.utils.import("resource://gre/modules/vtt.jsm");
8 var Ci = Components.interfaces;
10 var WEBVTTPARSERWRAPPER_CID = "{acf6e493-0092-4b26-b172-241e375c57ab}";
11 var WEBVTTPARSERWRAPPER_CONTRACTID = "@mozilla.org/webvttParserWrapper;1";
13 function WebVTTParserWrapper()
14 {
15 // Nothing
16 }
18 WebVTTParserWrapper.prototype =
19 {
20 loadParser: function(window)
21 {
22 this.parser = new WebVTT.Parser(window, new TextDecoder("utf8"));
23 },
25 parse: function(data)
26 {
27 // We can safely translate the string data to a Uint8Array as we are
28 // guaranteed character codes only from \u0000 => \u00ff
29 var buffer = new Uint8Array(data.length);
30 for (var i = 0; i < data.length; i++) {
31 buffer[i] = data.charCodeAt(i);
32 }
34 this.parser.parse(buffer);
35 },
37 flush: function()
38 {
39 this.parser.flush();
40 },
42 watch: function(callback)
43 {
44 this.parser.oncue = callback.onCue;
45 this.parser.onregion = callback.onRegion;
46 this.parser.onparsingerror = function(e) {
47 // Passing the just the error code back is enough for our needs.
48 callback.onParsingError(("code" in e) ? e.code : -1);
49 };
50 },
52 convertCueToDOMTree: function(window, cue)
53 {
54 return WebVTT.convertCueToDOMTree(window, cue.text);
55 },
57 processCues: function(window, cues, overlay)
58 {
59 WebVTT.processCues(window, cues, overlay);
60 },
62 classDescription: "Wrapper for the JS WebVTT implementation (vtt.js)",
63 classID: Components.ID(WEBVTTPARSERWRAPPER_CID),
64 QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebVTTParserWrapper]),
65 classInfo: XPCOMUtils.generateCI({
66 classID: WEBVTTPARSERWRAPPER_CID,
67 contractID: WEBVTTPARSERWRAPPER_CONTRACTID,
68 interfaces: [Ci.nsIWebVTTParserWrapper]
69 })
70 };
72 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebVTTParserWrapper]);
