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// Copyright 2022 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_COMPUTE_PRESSURE_PRESSURE_OBSERVER_MANAGER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_COMPUTE_PRESSURE_PRESSURE_OBSERVER_MANAGER_H_
#include "services/device/public/mojom/pressure_update.mojom-blink-forward.h"
#include "third_party/blink/public/mojom/compute_pressure/web_pressure_manager.mojom-blink.h"
#include "third_party/blink/public/mojom/frame/lifecycle.mojom-blink.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_pressure_source.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_state_observer.h"
#include "third_party/blink/renderer/modules/compute_pressure/pressure_client_impl.h"
#include "third_party/blink/renderer/modules/compute_pressure/pressure_observer.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/supplementable.h"
namespace blink {
class ExecutionContext;
// This class keeps track of PressureClientImpls and the connection to the
// PressureManager remote.
class MODULES_EXPORT PressureObserverManager final
: public GarbageCollected<PressureObserverManager>,
public ExecutionContextLifecycleStateObserver,
public Supplement<ExecutionContext> {
public:
static const char kSupplementName[];
static PressureObserverManager* From(ExecutionContext*);
explicit PressureObserverManager(ExecutionContext*);
~PressureObserverManager() override;
PressureObserverManager(const PressureObserverManager&) = delete;
PressureObserverManager& operator=(const PressureObserverManager&) = delete;
void AddObserver(V8PressureSource::Enum, PressureObserver*);
void RemoveObserver(V8PressureSource::Enum, PressureObserver*);
void RemoveObserverFromAllSources(PressureObserver*);
// ContextLifecycleStateimplementation.
void ContextDestroyed() override;
void ContextLifecycleStateChanged(mojom::blink::FrameLifecycleState) override;
// GarbageCollected implementation.
void Trace(Visitor*) const override;
private:
void EnsureConnection(scoped_refptr<base::SingleThreadTaskRunner>);
// Called when `pressure_manager_` is disconnected.
void OnConnectionError();
// Called to reset for all PressureSources.
void Reset();
void DidAddClient(V8PressureSource::Enum,
device::mojom::blink::PressureManagerAddClientResult);
// Connection to the browser side implementation.
HeapMojoRemote<mojom::blink::WebPressureManager> pressure_manager_;
HeapHashMap<V8PressureSource::Enum, Member<PressureClientImpl>>
source_to_client_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_COMPUTE_PRESSURE_PRESSURE_OBSERVER_MANAGER_H_
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