1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/TextTrack.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,247 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 et tw=78: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "mozilla/dom/TextTrack.h"
1.11 +#include "mozilla/dom/TextTrackBinding.h"
1.12 +#include "mozilla/dom/TextTrackList.h"
1.13 +#include "mozilla/dom/TextTrackCue.h"
1.14 +#include "mozilla/dom/TextTrackCueList.h"
1.15 +#include "mozilla/dom/TextTrackRegion.h"
1.16 +#include "mozilla/dom/HTMLMediaElement.h"
1.17 +#include "mozilla/dom/HTMLTrackElement.h"
1.18 +
1.19 +namespace mozilla {
1.20 +namespace dom {
1.21 +
1.22 +NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrack,
1.23 + DOMEventTargetHelper,
1.24 + mCueList,
1.25 + mActiveCueList,
1.26 + mTextTrackList,
1.27 + mTrackElement)
1.28 +
1.29 +NS_IMPL_ADDREF_INHERITED(TextTrack, DOMEventTargetHelper)
1.30 +NS_IMPL_RELEASE_INHERITED(TextTrack, DOMEventTargetHelper)
1.31 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TextTrack)
1.32 +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
1.33 +
1.34 +TextTrack::TextTrack(nsPIDOMWindow* aOwnerWindow,
1.35 + TextTrackKind aKind,
1.36 + const nsAString& aLabel,
1.37 + const nsAString& aLanguage,
1.38 + TextTrackMode aMode,
1.39 + TextTrackReadyState aReadyState,
1.40 + TextTrackSource aTextTrackSource)
1.41 + : DOMEventTargetHelper(aOwnerWindow)
1.42 + , mKind(aKind)
1.43 + , mLabel(aLabel)
1.44 + , mLanguage(aLanguage)
1.45 + , mMode(aMode)
1.46 + , mReadyState(aReadyState)
1.47 + , mTextTrackSource(aTextTrackSource)
1.48 +{
1.49 + SetDefaultSettings();
1.50 +}
1.51 +
1.52 +TextTrack::TextTrack(nsPIDOMWindow* aOwnerWindow,
1.53 + TextTrackList* aTextTrackList,
1.54 + TextTrackKind aKind,
1.55 + const nsAString& aLabel,
1.56 + const nsAString& aLanguage,
1.57 + TextTrackMode aMode,
1.58 + TextTrackReadyState aReadyState,
1.59 + TextTrackSource aTextTrackSource)
1.60 + : DOMEventTargetHelper(aOwnerWindow)
1.61 + , mTextTrackList(aTextTrackList)
1.62 + , mKind(aKind)
1.63 + , mLabel(aLabel)
1.64 + , mLanguage(aLanguage)
1.65 + , mMode(aMode)
1.66 + , mReadyState(aReadyState)
1.67 + , mTextTrackSource(aTextTrackSource)
1.68 +{
1.69 + SetDefaultSettings();
1.70 +}
1.71 +
1.72 +void
1.73 +TextTrack::SetDefaultSettings()
1.74 +{
1.75 + nsPIDOMWindow* ownerWindow = GetOwner();
1.76 + mCueList = new TextTrackCueList(ownerWindow);
1.77 + mActiveCueList = new TextTrackCueList(ownerWindow);
1.78 + mCuePos = 0;
1.79 + mDirty = false;
1.80 +}
1.81 +
1.82 +JSObject*
1.83 +TextTrack::WrapObject(JSContext* aCx)
1.84 +{
1.85 + return TextTrackBinding::Wrap(aCx, this);
1.86 +}
1.87 +
1.88 +void
1.89 +TextTrack::SetMode(TextTrackMode aValue)
1.90 +{
1.91 + if (mMode != aValue) {
1.92 + mMode = aValue;
1.93 + if (mTextTrackList) {
1.94 + mTextTrackList->CreateAndDispatchChangeEvent();
1.95 + }
1.96 + }
1.97 +}
1.98 +
1.99 +void
1.100 +TextTrack::GetId(nsAString& aId) const
1.101 +{
1.102 + // If the track has a track element then its id should be the same as the
1.103 + // track element's id.
1.104 + if (mTrackElement) {
1.105 + mTrackElement->GetAttribute(NS_LITERAL_STRING("id"), aId);
1.106 + }
1.107 +}
1.108 +
1.109 +void
1.110 +TextTrack::AddCue(TextTrackCue& aCue)
1.111 +{
1.112 + mCueList->AddCue(aCue);
1.113 + aCue.SetTrack(this);
1.114 + if (mTextTrackList) {
1.115 + HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
1.116 + if (mediaElement) {
1.117 + mediaElement->AddCue(aCue);
1.118 + }
1.119 + }
1.120 + SetDirty();
1.121 +}
1.122 +
1.123 +void
1.124 +TextTrack::RemoveCue(TextTrackCue& aCue, ErrorResult& aRv)
1.125 +{
1.126 + mCueList->RemoveCue(aCue, aRv);
1.127 + SetDirty();
1.128 +}
1.129 +
1.130 +void
1.131 +TextTrack::SetCuesDirty()
1.132 +{
1.133 + for (uint32_t i = 0; i < mCueList->Length(); i++) {
1.134 + ((*mCueList)[i])->Reset();
1.135 + }
1.136 +}
1.137 +
1.138 +void
1.139 +TextTrack::UpdateActiveCueList()
1.140 +{
1.141 + if (!mTextTrackList) {
1.142 + return;
1.143 + }
1.144 +
1.145 + HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
1.146 + if (!mediaElement) {
1.147 + return;
1.148 + }
1.149 +
1.150 + // If we are dirty, i.e. an event happened that may cause the sorted mCueList
1.151 + // to have changed like a seek or an insert for a cue, than we need to rebuild
1.152 + // the active cue list from scratch.
1.153 + if (mDirty) {
1.154 + mCuePos = 0;
1.155 + mDirty = false;
1.156 + mActiveCueList->RemoveAll();
1.157 + }
1.158 +
1.159 + double playbackTime = mediaElement->CurrentTime();
1.160 + // Remove all the cues from the active cue list whose end times now occur
1.161 + // earlier then the current playback time.
1.162 + for (uint32_t i = mActiveCueList->Length(); i > 0; i--) {
1.163 + if ((*mActiveCueList)[i - 1]->EndTime() < playbackTime) {
1.164 + mActiveCueList->RemoveCueAt(i - 1);
1.165 + }
1.166 + }
1.167 + // Add all the cues, starting from the position of the last cue that was
1.168 + // added, that have valid start and end times for the current playback time.
1.169 + // We can stop iterating safely once we encounter a cue that does not have
1.170 + // a valid start time as the cue list is sorted.
1.171 + for (; mCuePos < mCueList->Length() &&
1.172 + (*mCueList)[mCuePos]->StartTime() <= playbackTime; mCuePos++) {
1.173 + if ((*mCueList)[mCuePos]->EndTime() >= playbackTime) {
1.174 + mActiveCueList->AddCue(*(*mCueList)[mCuePos]);
1.175 + }
1.176 + }
1.177 +}
1.178 +
1.179 +TextTrackCueList*
1.180 +TextTrack::GetActiveCues() {
1.181 + if (mMode != TextTrackMode::Disabled) {
1.182 + UpdateActiveCueList();
1.183 + return mActiveCueList;
1.184 + }
1.185 + return nullptr;
1.186 +}
1.187 +
1.188 +void
1.189 +TextTrack::GetActiveCueArray(nsTArray<nsRefPtr<TextTrackCue> >& aCues)
1.190 +{
1.191 + if (mMode != TextTrackMode::Disabled) {
1.192 + UpdateActiveCueList();
1.193 + mActiveCueList->GetArray(aCues);
1.194 + }
1.195 +}
1.196 +
1.197 +TextTrackReadyState
1.198 +TextTrack::ReadyState() const
1.199 +{
1.200 + return mReadyState;
1.201 +}
1.202 +
1.203 +void
1.204 +TextTrack::SetReadyState(uint32_t aReadyState)
1.205 +{
1.206 + if (aReadyState <= TextTrackReadyState::FailedToLoad) {
1.207 + SetReadyState(static_cast<TextTrackReadyState>(aReadyState));
1.208 + }
1.209 +}
1.210 +
1.211 +void
1.212 +TextTrack::SetReadyState(TextTrackReadyState aState)
1.213 +{
1.214 + mReadyState = aState;
1.215 +
1.216 + if (!mTextTrackList) {
1.217 + return;
1.218 + }
1.219 +
1.220 + HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
1.221 + if (mediaElement && (mReadyState == TextTrackReadyState::Loaded||
1.222 + mReadyState == TextTrackReadyState::FailedToLoad)) {
1.223 + mediaElement->RemoveTextTrack(this, true);
1.224 + }
1.225 +}
1.226 +
1.227 +TextTrackList*
1.228 +TextTrack::GetTextTrackList()
1.229 +{
1.230 + return mTextTrackList;
1.231 +}
1.232 +
1.233 +void
1.234 +TextTrack::SetTextTrackList(TextTrackList* aTextTrackList)
1.235 +{
1.236 + mTextTrackList = aTextTrackList;
1.237 +}
1.238 +
1.239 +HTMLTrackElement*
1.240 +TextTrack::GetTrackElement() {
1.241 + return mTrackElement;
1.242 +}
1.243 +
1.244 +void
1.245 +TextTrack::SetTrackElement(HTMLTrackElement* aTrackElement) {
1.246 + mTrackElement = aTrackElement;
1.247 +}
1.248 +
1.249 +} // namespace dom
1.250 +} // namespace mozilla
