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