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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_TRACK_TRACK_LIST_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_TRACK_TRACK_LIST_BASE_H_
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/html/media/html_media_element.h"
#include "third_party/blink/renderer/core/html/track/track_event.h"
namespace blink {
template <class T>
class TrackListBase : public EventTargetWithInlineData {
public:
explicit TrackListBase(HTMLMediaElement* media_element)
: media_element_(media_element) {}
~TrackListBase() override = default;
unsigned length() const { return tracks_.size(); }
T* AnonymousIndexedGetter(unsigned index) const {
if (index >= tracks_.size())
return nullptr;
return tracks_[index].Get();
}
T* getTrackById(const String& id) const {
for (const auto& track : tracks_) {
if (String(track->id()) == id)
return track.Get();
}
return nullptr;
}
DEFINE_ATTRIBUTE_EVENT_LISTENER(change, kChange)
DEFINE_ATTRIBUTE_EVENT_LISTENER(addtrack, kAddtrack)
DEFINE_ATTRIBUTE_EVENT_LISTENER(removetrack, kRemovetrack)
// EventTarget interface
ExecutionContext* GetExecutionContext() const override {
if (media_element_)
return media_element_->GetExecutionContext();
return nullptr;
}
void Add(T* track) {
track->SetMediaElement(media_element_);
tracks_.push_back(track);
ScheduleEvent(TrackEvent::Create(event_type_names::kAddtrack, track));
}
void Remove(WebMediaPlayer::TrackId track_id) {
for (unsigned i = 0; i < tracks_.size(); ++i) {
if (tracks_[i]->id() != track_id)
continue;
tracks_[i]->SetMediaElement(nullptr);
ScheduleEvent(
TrackEvent::Create(event_type_names::kRemovetrack, tracks_[i].Get()));
tracks_.EraseAt(i);
return;
}
NOTREACHED();
}
void RemoveAll() {
for (const auto& track : tracks_)
track->SetMediaElement(nullptr);
tracks_.clear();
}
void ScheduleChangeEvent() {
ScheduleEvent(Event::Create(event_type_names::kChange));
}
void Trace(Visitor* visitor) override {
visitor->Trace(tracks_);
visitor->Trace(media_element_);
EventTargetWithInlineData::Trace(visitor);
}
private:
void ScheduleEvent(Event* event) {
event->SetTarget(this);
media_element_->ScheduleEvent(event);
}
HeapVector<Member<T>> tracks_;
Member<HTMLMediaElement> media_element_;
};
} // namespace blink
#endif
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