1 files changed, 72 insertions, 0 deletions
diff --git a/dom/media/webvtt/WebVTTParserWrapper.js b/dom/media/webvtt/WebVTTParserWrapper.js
new file mode 100644
index 000000000..5a36308fd
--- /dev/null
+++ b/dom/media/webvtt/WebVTTParserWrapper.js
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/vtt.jsm");
+
+var Ci = Components.interfaces;
+
+var WEBVTTPARSERWRAPPER_CID = "{acf6e493-0092-4b26-b172-241e375c57ab}";
+var WEBVTTPARSERWRAPPER_CONTRACTID = "@mozilla.org/webvttParserWrapper;1";
+
+function WebVTTParserWrapper()
+{
+  // Nothing
+}
+
+WebVTTParserWrapper.prototype =
+{
+  loadParser: function(window)
+  {
+    this.parser = new WebVTT.Parser(window,  new TextDecoder("utf8"));
+  },
+
+  parse: function(data)
+  {
+    // We can safely translate the string data to a Uint8Array as we are
+    // guaranteed character codes only from \u0000 => \u00ff
+    var buffer = new Uint8Array(data.length);
+    for (var i = 0; i < data.length; i++) {
+      buffer[i] = data.charCodeAt(i);
+    }
+
+    this.parser.parse(buffer);
+  },
+
+  flush: function()
+  {
+    this.parser.flush();
+  },
+
+  watch: function(callback)
+  {
+    this.parser.oncue = callback.onCue;
+    this.parser.onregion = callback.onRegion;
+    this.parser.onparsingerror = function(e) {
+      // Passing the just the error code back is enough for our needs.
+      callback.onParsingError(("code" in e) ? e.code : -1);
+    };
+  },
+
+  convertCueToDOMTree: function(window, cue)
+  {
+    return WebVTT.convertCueToDOMTree(window, cue.text);
+  },
+
+  processCues: function(window, cues, overlay, controls)
+  {
+    WebVTT.processCues(window, cues, overlay, controls);
+  },
+
+  classDescription: "Wrapper for the JS WebVTT implementation (vtt.js)",
+  classID: Components.ID(WEBVTTPARSERWRAPPER_CID),
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebVTTParserWrapper]),
+  classInfo: XPCOMUtils.generateCI({
+    classID:    WEBVTTPARSERWRAPPER_CID,
+    contractID: WEBVTTPARSERWRAPPER_CONTRACTID,
+    interfaces: [Ci.nsIWebVTTParserWrapper]
+  })
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebVTTParserWrapper]);