michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: Components.utils.import("resource://gre/modules/vtt.jsm");
michael@0: 
michael@0: var Ci = Components.interfaces;
michael@0: 
michael@0: var WEBVTTPARSERWRAPPER_CID = "{acf6e493-0092-4b26-b172-241e375c57ab}";
michael@0: var WEBVTTPARSERWRAPPER_CONTRACTID = "@mozilla.org/webvttParserWrapper;1";
michael@0: 
michael@0: function WebVTTParserWrapper()
michael@0: {
michael@0:   // Nothing
michael@0: }
michael@0: 
michael@0: WebVTTParserWrapper.prototype =
michael@0: {
michael@0:   loadParser: function(window)
michael@0:   {
michael@0:     this.parser = new WebVTT.Parser(window,  new TextDecoder("utf8"));
michael@0:   },
michael@0: 
michael@0:   parse: function(data)
michael@0:   {
michael@0:     // We can safely translate the string data to a Uint8Array as we are
michael@0:     // guaranteed character codes only from \u0000 => \u00ff
michael@0:     var buffer = new Uint8Array(data.length);
michael@0:     for (var i = 0; i < data.length; i++) {
michael@0:       buffer[i] = data.charCodeAt(i);
michael@0:     }
michael@0: 
michael@0:     this.parser.parse(buffer);
michael@0:   },
michael@0: 
michael@0:   flush: function()
michael@0:   {
michael@0:     this.parser.flush();
michael@0:   },
michael@0: 
michael@0:   watch: function(callback)
michael@0:   {
michael@0:     this.parser.oncue = callback.onCue;
michael@0:     this.parser.onregion = callback.onRegion;
michael@0:     this.parser.onparsingerror = function(e) {
michael@0:       // Passing the just the error code back is enough for our needs.
michael@0:       callback.onParsingError(("code" in e) ? e.code : -1);
michael@0:     };
michael@0:   },
michael@0: 
michael@0:   convertCueToDOMTree: function(window, cue)
michael@0:   {
michael@0:     return WebVTT.convertCueToDOMTree(window, cue.text);
michael@0:   },
michael@0: 
michael@0:   processCues: function(window, cues, overlay)
michael@0:   {
michael@0:     WebVTT.processCues(window, cues, overlay);
michael@0:   },
michael@0: 
michael@0:   classDescription: "Wrapper for the JS WebVTT implementation (vtt.js)",
michael@0:   classID: Components.ID(WEBVTTPARSERWRAPPER_CID),
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebVTTParserWrapper]),
michael@0:   classInfo: XPCOMUtils.generateCI({
michael@0:     classID:    WEBVTTPARSERWRAPPER_CID,
michael@0:     contractID: WEBVTTPARSERWRAPPER_CONTRACTID,
michael@0:     interfaces: [Ci.nsIWebVTTParserWrapper]
michael@0:   })
michael@0: };
michael@0: 
michael@0: this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebVTTParserWrapper]);