michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 et tw=78: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "mozilla/dom/TextTrack.h"
michael@0: #include "mozilla/dom/TextTrackBinding.h"
michael@0: #include "mozilla/dom/TextTrackList.h"
michael@0: #include "mozilla/dom/TextTrackCue.h"
michael@0: #include "mozilla/dom/TextTrackCueList.h"
michael@0: #include "mozilla/dom/TextTrackRegion.h"
michael@0: #include "mozilla/dom/HTMLMediaElement.h"
michael@0: #include "mozilla/dom/HTMLTrackElement.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrack,
michael@0:                                    DOMEventTargetHelper,
michael@0:                                    mCueList,
michael@0:                                    mActiveCueList,
michael@0:                                    mTextTrackList,
michael@0:                                    mTrackElement)
michael@0: 
michael@0: NS_IMPL_ADDREF_INHERITED(TextTrack, DOMEventTargetHelper)
michael@0: NS_IMPL_RELEASE_INHERITED(TextTrack, DOMEventTargetHelper)
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TextTrack)
michael@0: NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
michael@0: 
michael@0: TextTrack::TextTrack(nsPIDOMWindow* aOwnerWindow,
michael@0:                      TextTrackKind aKind,
michael@0:                      const nsAString& aLabel,
michael@0:                      const nsAString& aLanguage,
michael@0:                      TextTrackMode aMode,
michael@0:                      TextTrackReadyState aReadyState,
michael@0:                      TextTrackSource aTextTrackSource)
michael@0:   : DOMEventTargetHelper(aOwnerWindow)
michael@0:   , mKind(aKind)
michael@0:   , mLabel(aLabel)
michael@0:   , mLanguage(aLanguage)
michael@0:   , mMode(aMode)
michael@0:   , mReadyState(aReadyState)
michael@0:   , mTextTrackSource(aTextTrackSource)
michael@0: {
michael@0:   SetDefaultSettings();
michael@0: }
michael@0: 
michael@0: TextTrack::TextTrack(nsPIDOMWindow* aOwnerWindow,
michael@0:                      TextTrackList* aTextTrackList,
michael@0:                      TextTrackKind aKind,
michael@0:                      const nsAString& aLabel,
michael@0:                      const nsAString& aLanguage,
michael@0:                      TextTrackMode aMode,
michael@0:                      TextTrackReadyState aReadyState,
michael@0:                      TextTrackSource aTextTrackSource)
michael@0:   : DOMEventTargetHelper(aOwnerWindow)
michael@0:   , mTextTrackList(aTextTrackList)
michael@0:   , mKind(aKind)
michael@0:   , mLabel(aLabel)
michael@0:   , mLanguage(aLanguage)
michael@0:   , mMode(aMode)
michael@0:   , mReadyState(aReadyState)
michael@0:   , mTextTrackSource(aTextTrackSource)
michael@0: {
michael@0:   SetDefaultSettings();
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetDefaultSettings()
michael@0: {
michael@0:   nsPIDOMWindow* ownerWindow = GetOwner();
michael@0:   mCueList = new TextTrackCueList(ownerWindow);
michael@0:   mActiveCueList = new TextTrackCueList(ownerWindow);
michael@0:   mCuePos = 0;
michael@0:   mDirty = false;
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: TextTrack::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return TextTrackBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetMode(TextTrackMode aValue)
michael@0: {
michael@0:   if (mMode != aValue) {
michael@0:     mMode = aValue;
michael@0:     if (mTextTrackList) {
michael@0:       mTextTrackList->CreateAndDispatchChangeEvent();
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::GetId(nsAString& aId) const
michael@0: {
michael@0:   // If the track has a track element then its id should be the same as the
michael@0:   // track element's id.
michael@0:   if (mTrackElement) {
michael@0:     mTrackElement->GetAttribute(NS_LITERAL_STRING("id"), aId);
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::AddCue(TextTrackCue& aCue)
michael@0: {
michael@0:   mCueList->AddCue(aCue);
michael@0:   aCue.SetTrack(this);
michael@0:   if (mTextTrackList) {
michael@0:     HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
michael@0:     if (mediaElement) {
michael@0:       mediaElement->AddCue(aCue);
michael@0:     }
michael@0:   }
michael@0:   SetDirty();
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::RemoveCue(TextTrackCue& aCue, ErrorResult& aRv)
michael@0: {
michael@0:   mCueList->RemoveCue(aCue, aRv);
michael@0:   SetDirty();
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetCuesDirty()
michael@0: {
michael@0:   for (uint32_t i = 0; i < mCueList->Length(); i++) {
michael@0:     ((*mCueList)[i])->Reset();
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::UpdateActiveCueList()
michael@0: {
michael@0:   if (!mTextTrackList) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
michael@0:   if (!mediaElement) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // If we are dirty, i.e. an event happened that may cause the sorted mCueList
michael@0:   // to have changed like a seek or an insert for a cue, than we need to rebuild
michael@0:   // the active cue list from scratch.
michael@0:   if (mDirty) {
michael@0:     mCuePos = 0;
michael@0:     mDirty = false;
michael@0:     mActiveCueList->RemoveAll();
michael@0:   }
michael@0: 
michael@0:   double playbackTime = mediaElement->CurrentTime();
michael@0:   // Remove all the cues from the active cue list whose end times now occur
michael@0:   // earlier then the current playback time.
michael@0:   for (uint32_t i = mActiveCueList->Length(); i > 0; i--) {
michael@0:     if ((*mActiveCueList)[i - 1]->EndTime() < playbackTime) {
michael@0:       mActiveCueList->RemoveCueAt(i - 1);
michael@0:     }
michael@0:   }
michael@0:   // Add all the cues, starting from the position of the last cue that was
michael@0:   // added, that have valid start and end times for the current playback time.
michael@0:   // We can stop iterating safely once we encounter a cue that does not have
michael@0:   // a valid start time as the cue list is sorted.
michael@0:   for (; mCuePos < mCueList->Length() &&
michael@0:          (*mCueList)[mCuePos]->StartTime() <= playbackTime; mCuePos++) {
michael@0:     if ((*mCueList)[mCuePos]->EndTime() >= playbackTime) {
michael@0:       mActiveCueList->AddCue(*(*mCueList)[mCuePos]);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: TextTrackCueList*
michael@0: TextTrack::GetActiveCues() {
michael@0:   if (mMode != TextTrackMode::Disabled) {
michael@0:     UpdateActiveCueList();
michael@0:     return mActiveCueList;
michael@0:   }
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::GetActiveCueArray(nsTArray<nsRefPtr<TextTrackCue> >& aCues)
michael@0: {
michael@0:   if (mMode != TextTrackMode::Disabled) {
michael@0:     UpdateActiveCueList();
michael@0:     mActiveCueList->GetArray(aCues);
michael@0:   }
michael@0: }
michael@0: 
michael@0: TextTrackReadyState
michael@0: TextTrack::ReadyState() const
michael@0: {
michael@0:   return mReadyState;
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetReadyState(uint32_t aReadyState)
michael@0: {
michael@0:   if (aReadyState <= TextTrackReadyState::FailedToLoad) {
michael@0:     SetReadyState(static_cast<TextTrackReadyState>(aReadyState));
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetReadyState(TextTrackReadyState aState)
michael@0: {
michael@0:   mReadyState = aState;
michael@0: 
michael@0:   if (!mTextTrackList) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
michael@0:   if (mediaElement && (mReadyState == TextTrackReadyState::Loaded||
michael@0:       mReadyState == TextTrackReadyState::FailedToLoad)) {
michael@0:     mediaElement->RemoveTextTrack(this, true);
michael@0:   }
michael@0: }
michael@0: 
michael@0: TextTrackList*
michael@0: TextTrack::GetTextTrackList()
michael@0: {
michael@0:   return mTextTrackList;
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetTextTrackList(TextTrackList* aTextTrackList)
michael@0: {
michael@0:   mTextTrackList = aTextTrackList;
michael@0: }
michael@0: 
michael@0: HTMLTrackElement*
michael@0: TextTrack::GetTrackElement() {
michael@0:   return mTrackElement;
michael@0: }
michael@0: 
michael@0: void
michael@0: TextTrack::SetTrackElement(HTMLTrackElement* aTrackElement) {
michael@0:   mTrackElement = aTrackElement;
michael@0: }
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla