Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#include "mozilla/dom/TextTrackList.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/TextTrackListBinding.h"
#include "mozilla/dom/TrackEvent.h"
#include "nsThreadUtils.h"
#include "nsGlobalWindowInner.h"
#include "mozilla/dom/TextTrackCue.h"
#include "mozilla/dom/TextTrackManager.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrackList, DOMEventTargetHelper,
mTextTracks, mTextTrackManager)
NS_IMPL_ADDREF_INHERITED(TextTrackList, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(TextTrackList, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TextTrackList)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
TextTrackList::TextTrackList(nsPIDOMWindowInner* aOwnerWindow)
: DOMEventTargetHelper(aOwnerWindow) {}
TextTrackList::TextTrackList(nsPIDOMWindowInner* aOwnerWindow,
TextTrackManager* aTextTrackManager)
: DOMEventTargetHelper(aOwnerWindow),
mTextTrackManager(aTextTrackManager) {}
TextTrackList::~TextTrackList() = default;
void TextTrackList::GetShowingCues(nsTArray<RefPtr<TextTrackCue>>& aCues) {
// Only Subtitles and Captions can show on the screen.
nsTArray<RefPtr<TextTrackCue>> cues;
for (uint32_t i = 0; i < Length(); i++) {
if (mTextTracks[i]->Mode() == TextTrackMode::Showing &&
(mTextTracks[i]->Kind() == TextTrackKind::Subtitles ||
mTextTracks[i]->Kind() == TextTrackKind::Captions)) {
mTextTracks[i]->GetActiveCueArray(cues);
aCues.AppendElements(cues);
}
}
}
JSObject* TextTrackList::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return TextTrackList_Binding::Wrap(aCx, this, aGivenProto);
}
TextTrack* TextTrackList::IndexedGetter(uint32_t aIndex, bool& aFound) {
aFound = aIndex < mTextTracks.Length();
if (!aFound) {
return nullptr;
}
return mTextTracks[aIndex];
}
TextTrack* TextTrackList::operator[](uint32_t aIndex) {
return mTextTracks.SafeElementAt(aIndex, nullptr);
}
already_AddRefed<TextTrack> TextTrackList::AddTextTrack(
TextTrackKind aKind, const nsAString& aLabel, const nsAString& aLanguage,
TextTrackMode aMode, TextTrackReadyState aReadyState,
TextTrackSource aTextTrackSource, const CompareTextTracks& aCompareTT) {
RefPtr<TextTrack> track =
new TextTrack(GetOwnerWindow(), this, aKind, aLabel, aLanguage, aMode,
aReadyState, aTextTrackSource);
AddTextTrack(track, aCompareTT);
return track.forget();
}
void TextTrackList::AddTextTrack(TextTrack* aTextTrack,
const CompareTextTracks& aCompareTT) {
if (mTextTracks.Contains(aTextTrack)) {
return;
}
mTextTracks.InsertElementSorted(aTextTrack, aCompareTT);
aTextTrack->SetTextTrackList(this);
CreateAndDispatchTrackEventRunner(aTextTrack, u"addtrack"_ns);
}
TextTrack* TextTrackList::GetTrackById(const nsAString& aId) {
nsAutoString id;
for (uint32_t i = 0; i < Length(); i++) {
mTextTracks[i]->GetId(id);
if (aId.Equals(id)) {
return mTextTracks[i];
}
}
return nullptr;
}
void TextTrackList::RemoveTextTrack(TextTrack* aTrack) {
if (mTextTracks.RemoveElement(aTrack)) {
CreateAndDispatchTrackEventRunner(aTrack, u"removetrack"_ns);
}
}
class TrackEventRunner : public Runnable {
public:
TrackEventRunner(TextTrackList* aList, Event* aEvent)
: Runnable("dom::TrackEventRunner"), mList(aList), mEvent(aEvent) {}
NS_IMETHOD Run() override { return mList->DispatchTrackEvent(mEvent); }
RefPtr<TextTrackList> mList;
private:
RefPtr<Event> mEvent;
};
nsresult TextTrackList::DispatchTrackEvent(Event* aEvent) {
return DispatchTrustedEvent(aEvent);
}
void TextTrackList::CreateAndDispatchChangeEvent() {
MOZ_ASSERT(NS_IsMainThread());
nsPIDOMWindowInner* win = GetOwnerWindow();
if (!win) {
return;
}
RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
event->InitEvent(u"change"_ns, false, false);
event->SetTrusted(true);
nsCOMPtr<nsIRunnable> eventRunner = new TrackEventRunner(this, event);
nsGlobalWindowInner::Cast(win)->Dispatch(eventRunner.forget());
}
void TextTrackList::CreateAndDispatchTrackEventRunner(
TextTrack* aTrack, const nsAString& aEventName) {
nsCOMPtr<nsIEventTarget> target = GetMainThreadSerialEventTarget();
if (!target) {
// If we are not able to get the main-thread object we are shutting down.
return;
}
TrackEventInit eventInit;
eventInit.mTrack.SetValue().SetAsTextTrack() = aTrack;
RefPtr<TrackEvent> event =
TrackEvent::Constructor(this, aEventName, eventInit);
// Dispatch the TrackEvent asynchronously.
DebugOnly<nsresult> rv = target->Dispatch(
do_AddRef(new TrackEventRunner(this, event)), NS_DISPATCH_NORMAL);
// If we are shutting down this can file but it's still ok.
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Dispatch failed");
}
HTMLMediaElement* TextTrackList::GetMediaElement() {
if (mTextTrackManager) {
return mTextTrackManager->mMediaElement;
}
return nullptr;
}
void TextTrackList::SetTextTrackManager(TextTrackManager* aTextTrackManager) {
mTextTrackManager = aTextTrackManager;
}
void TextTrackList::SetCuesInactive() {
for (uint32_t i = 0; i < Length(); i++) {
mTextTracks[i]->SetCuesInactive();
}
}
bool TextTrackList::AreTextTracksLoaded() {
// Return false if any texttrack is not loaded.
for (uint32_t i = 0; i < Length(); i++) {
if (!mTextTracks[i]->IsLoaded()) {
return false;
}
}
return true;
}
nsTArray<RefPtr<TextTrack>>& TextTrackList::GetTextTrackArray() {
return mTextTracks;
}
} // namespace mozilla::dom