diff -r 000000000000 -r 6474c204b198 content/media/TextTrackCue.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/TextTrackCue.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,168 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "mozilla/dom/HTMLTrackElement.h"
+#include "mozilla/dom/TextTrackCue.h"
+#include "mozilla/dom/TextTrackRegion.h"
+#include "nsComponentManagerUtils.h"
+#include "mozilla/ClearOnShutdown.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrackCue,
+                                   DOMEventTargetHelper,
+                                   mDocument,
+                                   mTrack,
+                                   mTrackElement,
+                                   mDisplayState,
+                                   mRegion)
+
+NS_IMPL_ADDREF_INHERITED(TextTrackCue, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(TextTrackCue, DOMEventTargetHelper)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TextTrackCue)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+StaticRefPtr<nsIWebVTTParserWrapper> TextTrackCue::sParserWrapper;
+
+// Set cue setting defaults based on step 19 & seq.
+// in http://dev.w3.org/html5/webvtt/#parsing
+void
+TextTrackCue::SetDefaultCueSettings()
+{
+  mPosition = 50;
+  mPositionAlign = AlignSetting::Middle;
+  mSize = 100;
+  mPauseOnExit = false;
+  mSnapToLines = true;
+  mLineIsAutoKeyword = true;
+  mAlign = AlignSetting::Middle;
+  mLineAlign = AlignSetting::Start;
+  mVertical = DirectionSetting::_empty;
+}
+
+TextTrackCue::TextTrackCue(nsPIDOMWindow* aOwnerWindow,
+                           double aStartTime,
+                           double aEndTime,
+                           const nsAString& aText,
+                           ErrorResult& aRv)
+  : DOMEventTargetHelper(aOwnerWindow)
+  , mText(aText)
+  , mStartTime(aStartTime)
+  , mEndTime(aEndTime)
+  , mReset(false)
+{
+  SetDefaultCueSettings();
+  MOZ_ASSERT(aOwnerWindow);
+  if (NS_FAILED(StashDocument())) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+TextTrackCue::TextTrackCue(nsPIDOMWindow* aOwnerWindow,
+                           double aStartTime,
+                           double aEndTime,
+                           const nsAString& aText,
+                           HTMLTrackElement* aTrackElement,
+                           ErrorResult& aRv)
+  : DOMEventTargetHelper(aOwnerWindow)
+  , mText(aText)
+  , mStartTime(aStartTime)
+  , mEndTime(aEndTime)
+  , mTrackElement(aTrackElement)
+  , mReset(false)
+{
+  SetDefaultCueSettings();
+  MOZ_ASSERT(aOwnerWindow);
+  if (NS_FAILED(StashDocument())) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+/** Save a reference to our creating document so we don't have to
+ *  keep getting it from our window.
+ */
+nsresult
+TextTrackCue::StashDocument()
+{
+  nsPIDOMWindow* window = GetOwner();
+  if (!window) {
+    return NS_ERROR_NO_INTERFACE;
+  }
+  mDocument = window->GetDoc();
+  if (!mDocument) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  return NS_OK;
+}
+
+already_AddRefed<DocumentFragment>
+TextTrackCue::GetCueAsHTML()
+{
+  // mDocument may be null during cycle collector shutdown.
+  // See bug 941701.
+  if (!mDocument) {
+    return nullptr;
+  }
+
+  if (!sParserWrapper) {
+    nsresult rv;
+    nsCOMPtr<nsIWebVTTParserWrapper> parserWrapper =
+      do_CreateInstance(NS_WEBVTTPARSERWRAPPER_CONTRACTID, &rv);
+    if (NS_FAILED(rv)) {
+      return mDocument->CreateDocumentFragment();
+    }
+    sParserWrapper = parserWrapper;
+    ClearOnShutdown(&sParserWrapper);
+  }
+
+  nsPIDOMWindow* window = mDocument->GetWindow();
+  if (!window) {
+    return mDocument->CreateDocumentFragment();
+  }
+
+  nsCOMPtr<nsIDOMHTMLElement> div;
+  sParserWrapper->ConvertCueToDOMTree(window, this,
+                                      getter_AddRefs(div));
+  if (!div) {
+    return mDocument->CreateDocumentFragment();
+  }
+  nsRefPtr<DocumentFragment> docFrag = mDocument->CreateDocumentFragment();
+  nsCOMPtr<nsIDOMNode> throwAway;
+  docFrag->AppendChild(div, getter_AddRefs(throwAway));
+
+  return docFrag.forget();
+}
+
+void
+TextTrackCue::SetTrackElement(HTMLTrackElement* aTrackElement)
+{
+  mTrackElement = aTrackElement;
+}
+
+JSObject*
+TextTrackCue::WrapObject(JSContext* aCx)
+{
+  return VTTCueBinding::Wrap(aCx, this);
+}
+
+TextTrackRegion*
+TextTrackCue::GetRegion()
+{
+  return mRegion;
+}
+
+void
+TextTrackCue::SetRegion(TextTrackRegion* aRegion)
+{
+  if (mRegion == aRegion) {
+    return;
+  }
+  mRegion = aRegion;
+  mReset = true;
+}
+
+} // namespace dom
+} // namespace mozilla