1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/TextTrackCue.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,168 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/dom/HTMLTrackElement.h"
1.10 +#include "mozilla/dom/TextTrackCue.h"
1.11 +#include "mozilla/dom/TextTrackRegion.h"
1.12 +#include "nsComponentManagerUtils.h"
1.13 +#include "mozilla/ClearOnShutdown.h"
1.14 +
1.15 +namespace mozilla {
1.16 +namespace dom {
1.17 +
1.18 +NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrackCue,
1.19 + DOMEventTargetHelper,
1.20 + mDocument,
1.21 + mTrack,
1.22 + mTrackElement,
1.23 + mDisplayState,
1.24 + mRegion)
1.25 +
1.26 +NS_IMPL_ADDREF_INHERITED(TextTrackCue, DOMEventTargetHelper)
1.27 +NS_IMPL_RELEASE_INHERITED(TextTrackCue, DOMEventTargetHelper)
1.28 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TextTrackCue)
1.29 +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
1.30 +
1.31 +StaticRefPtr<nsIWebVTTParserWrapper> TextTrackCue::sParserWrapper;
1.32 +
1.33 +// Set cue setting defaults based on step 19 & seq.
1.34 +// in http://dev.w3.org/html5/webvtt/#parsing
1.35 +void
1.36 +TextTrackCue::SetDefaultCueSettings()
1.37 +{
1.38 + mPosition = 50;
1.39 + mPositionAlign = AlignSetting::Middle;
1.40 + mSize = 100;
1.41 + mPauseOnExit = false;
1.42 + mSnapToLines = true;
1.43 + mLineIsAutoKeyword = true;
1.44 + mAlign = AlignSetting::Middle;
1.45 + mLineAlign = AlignSetting::Start;
1.46 + mVertical = DirectionSetting::_empty;
1.47 +}
1.48 +
1.49 +TextTrackCue::TextTrackCue(nsPIDOMWindow* aOwnerWindow,
1.50 + double aStartTime,
1.51 + double aEndTime,
1.52 + const nsAString& aText,
1.53 + ErrorResult& aRv)
1.54 + : DOMEventTargetHelper(aOwnerWindow)
1.55 + , mText(aText)
1.56 + , mStartTime(aStartTime)
1.57 + , mEndTime(aEndTime)
1.58 + , mReset(false)
1.59 +{
1.60 + SetDefaultCueSettings();
1.61 + MOZ_ASSERT(aOwnerWindow);
1.62 + if (NS_FAILED(StashDocument())) {
1.63 + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
1.64 + }
1.65 +}
1.66 +
1.67 +TextTrackCue::TextTrackCue(nsPIDOMWindow* aOwnerWindow,
1.68 + double aStartTime,
1.69 + double aEndTime,
1.70 + const nsAString& aText,
1.71 + HTMLTrackElement* aTrackElement,
1.72 + ErrorResult& aRv)
1.73 + : DOMEventTargetHelper(aOwnerWindow)
1.74 + , mText(aText)
1.75 + , mStartTime(aStartTime)
1.76 + , mEndTime(aEndTime)
1.77 + , mTrackElement(aTrackElement)
1.78 + , mReset(false)
1.79 +{
1.80 + SetDefaultCueSettings();
1.81 + MOZ_ASSERT(aOwnerWindow);
1.82 + if (NS_FAILED(StashDocument())) {
1.83 + aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
1.84 + }
1.85 +}
1.86 +
1.87 +/** Save a reference to our creating document so we don't have to
1.88 + * keep getting it from our window.
1.89 + */
1.90 +nsresult
1.91 +TextTrackCue::StashDocument()
1.92 +{
1.93 + nsPIDOMWindow* window = GetOwner();
1.94 + if (!window) {
1.95 + return NS_ERROR_NO_INTERFACE;
1.96 + }
1.97 + mDocument = window->GetDoc();
1.98 + if (!mDocument) {
1.99 + return NS_ERROR_NOT_AVAILABLE;
1.100 + }
1.101 + return NS_OK;
1.102 +}
1.103 +
1.104 +already_AddRefed<DocumentFragment>
1.105 +TextTrackCue::GetCueAsHTML()
1.106 +{
1.107 + // mDocument may be null during cycle collector shutdown.
1.108 + // See bug 941701.
1.109 + if (!mDocument) {
1.110 + return nullptr;
1.111 + }
1.112 +
1.113 + if (!sParserWrapper) {
1.114 + nsresult rv;
1.115 + nsCOMPtr<nsIWebVTTParserWrapper> parserWrapper =
1.116 + do_CreateInstance(NS_WEBVTTPARSERWRAPPER_CONTRACTID, &rv);
1.117 + if (NS_FAILED(rv)) {
1.118 + return mDocument->CreateDocumentFragment();
1.119 + }
1.120 + sParserWrapper = parserWrapper;
1.121 + ClearOnShutdown(&sParserWrapper);
1.122 + }
1.123 +
1.124 + nsPIDOMWindow* window = mDocument->GetWindow();
1.125 + if (!window) {
1.126 + return mDocument->CreateDocumentFragment();
1.127 + }
1.128 +
1.129 + nsCOMPtr<nsIDOMHTMLElement> div;
1.130 + sParserWrapper->ConvertCueToDOMTree(window, this,
1.131 + getter_AddRefs(div));
1.132 + if (!div) {
1.133 + return mDocument->CreateDocumentFragment();
1.134 + }
1.135 + nsRefPtr<DocumentFragment> docFrag = mDocument->CreateDocumentFragment();
1.136 + nsCOMPtr<nsIDOMNode> throwAway;
1.137 + docFrag->AppendChild(div, getter_AddRefs(throwAway));
1.138 +
1.139 + return docFrag.forget();
1.140 +}
1.141 +
1.142 +void
1.143 +TextTrackCue::SetTrackElement(HTMLTrackElement* aTrackElement)
1.144 +{
1.145 + mTrackElement = aTrackElement;
1.146 +}
1.147 +
1.148 +JSObject*
1.149 +TextTrackCue::WrapObject(JSContext* aCx)
1.150 +{
1.151 + return VTTCueBinding::Wrap(aCx, this);
1.152 +}
1.153 +
1.154 +TextTrackRegion*
1.155 +TextTrackCue::GetRegion()
1.156 +{
1.157 + return mRegion;
1.158 +}
1.159 +
1.160 +void
1.161 +TextTrackCue::SetRegion(TextTrackRegion* aRegion)
1.162 +{
1.163 + if (mRegion == aRegion) {
1.164 + return;
1.165 + }
1.166 + mRegion = aRegion;
1.167 + mReset = true;
1.168 +}
1.169 +
1.170 +} // namespace dom
1.171 +} // namespace mozilla
