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// Copyright 2021 The Chromium Authors
// 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_MODULES_WEBCODECS_IMAGE_TRACK_LIST_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBCODECS_IMAGE_TRACK_LIST_H_
#include "third_party/blink/renderer/bindings/core/v8/script_promise_property.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/member.h"
namespace blink {
class ImageDecoderExternal;
class ImageTrack;
class MODULES_EXPORT ImageTrackList final : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
explicit ImageTrackList(ImageDecoderExternal* image_decoder);
~ImageTrackList() override;
// image_track_list.idl implementation.
uint32_t length() const { return tracks_.size(); }
ImageTrack* AnonymousIndexedGetter(uint32_t index) const;
int32_t selectedIndex() const;
ImageTrack* selectedTrack() const;
ScriptPromise<IDLUndefined> ready(ScriptState* script_state);
bool IsEmpty() const { return tracks_.empty(); }
// Called when initial track metadata is known or an error has occurred. Pass
// a valid |exception| to reject the ready() promise.
void OnTracksReady(DOMException* exception = nullptr);
// Helper method for ImageDecoder to add tracks. Only one track may be marked
// as selected at any given time.
void AddTrack(uint32_t frame_count, int repetition_count, bool selected);
// Called by ImageTrack entries to update their track selection status.
void OnTrackSelectionChanged(wtf_size_t index);
// Disconnects and clears the ImageTrackList. Disconnecting releases all
// Member<> references held by the ImageTrackList and ImageTrack.
void Disconnect();
// GarbageCollected override
void Trace(Visitor* visitor) const override;
private:
Member<ImageDecoderExternal> image_decoder_;
HeapVector<Member<ImageTrack>> tracks_;
std::optional<wtf_size_t> selected_track_id_;
using ReadyProperty = ScriptPromiseProperty<IDLUndefined, DOMException>;
Member<ReadyProperty> ready_property_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBCODECS_IMAGE_TRACK_LIST_H_
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