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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 CONTENT_BROWSER_COMPUTE_PRESSURE_PRESSURE_SERVICE_BASE_H_
#define CONTENT_BROWSER_COMPUTE_PRESSURE_PRESSURE_SERVICE_BASE_H_
#include <array>
#include <optional>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/process/process_metrics.h"
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "base/unguessable_token.h"
#include "content/browser/compute_pressure/pressure_client_impl.h"
#include "content/browser/compute_pressure/web_contents_pressure_manager_proxy.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/pending_associated_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/device/public/cpp/compute_pressure/cpu_pressure_converter.h"
#include "services/device/public/mojom/pressure_manager.mojom.h"
#include "third_party/blink/public/mojom/compute_pressure/web_pressure_manager.mojom.h"
namespace content {
class RenderFrameHost;
// This class holds common functions for both frame and workers. It serves all
// the Compute Pressure API mojo requests.
//
// This class is not thread-safe, so each instance must be used on one sequence.
class CONTENT_EXPORT PressureServiceBase
: public blink::mojom::WebPressureManager,
public WebContentsPressureManagerProxy::Observer {
public:
~PressureServiceBase() override;
PressureServiceBase(const PressureServiceBase&) = delete;
PressureServiceBase& operator=(const PressureServiceBase&) = delete;
// https://www.w3.org/TR/compute-pressure/#dfn-document-has-implicit-focus
static bool HasImplicitFocus(RenderFrameHost* render_frame_host);
void BindReceiver(
mojo::PendingReceiver<blink::mojom::WebPressureManager> receiver);
virtual bool CanCallAddClient() const;
// blink::mojom::WebPressureManager implementation.
void AddClient(
device::mojom::PressureSource source,
mojo::PendingAssociatedRemote<blink::mojom::WebPressureClient> client,
AddClientCallback callback) override;
// WebContentsPressureManagerProxy::Observer implementation.
void DidAddVirtualPressureSource(device::mojom::PressureSource) override;
void DidRemoveVirtualPressureSource(device::mojom::PressureSource) override;
// Verifies if the data should be delivered according to focus status.
virtual bool ShouldDeliverUpdate() const = 0;
virtual double CalculateOwnContributionEstimate(
double global_cpu_utilization) = 0;
device::mojom::PressureState CalculateState(double global_cpu_utilization);
// Returns a token for use with automation calls when one is set.
virtual std::optional<base::UnguessableToken> GetTokenFor(
device::mojom::PressureSource) const = 0;
bool IsManagerReceiverBoundForTesting() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return manager_receiver_.is_bound();
}
const PressureClientImpl& GetPressureClientForTesting(
device::mojom::PressureSource source) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return source_to_client_[static_cast<size_t>(source)];
}
protected:
PressureServiceBase();
SEQUENCE_CHECKER(sequence_checker_);
// boolean parameter when true allows creation of the object if not found.
WebContentsPressureManagerProxy* GetWebContentsPressureManagerProxy(
bool allow_creation = false) const;
private:
virtual RenderFrameHost* GetRenderFrameHost() const;
void AddMessageToConsole(const std::string&) const;
void OnPressureManagerDisconnected();
void DidAddClient(device::mojom::PressureSource source,
const std::optional<base::UnguessableToken>&,
AddClientCallback client_callback,
device::mojom::PressureManagerAddClientResult);
// Handles break calibration mitigation and conversion from
// cpu_utilization to PressureState.
device::CpuPressureConverter converter_;
// Services side.
mojo::Remote<device::mojom::PressureManager> manager_remote_
GUARDED_BY_CONTEXT(sequence_checker_);
// Blink side.
mojo::Receiver<blink::mojom::WebPressureManager> GUARDED_BY_CONTEXT(
sequence_checker_) manager_receiver_{this};
std::array<PressureClientImpl,
static_cast<size_t>(device::mojom::PressureSource::kMaxValue) + 1>
source_to_client_ GUARDED_BY_CONTEXT(sequence_checker_);
base::WeakPtrFactory<PressureServiceBase> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_COMPUTE_PRESSURE_PRESSURE_SERVICE_BASE_H_
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