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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/compute_pressure/pressure_client_impl.h"
#include "base/check.h"
#include "base/check_deref.h"
#include "base/notreached.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "services/device/public/mojom/pressure_update.mojom-blink.h"
#include "third_party/blink/public/mojom/compute_pressure/web_pressure_manager.mojom-blink.h"
#include "third_party/blink/public/mojom/compute_pressure/web_pressure_update.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/dom_high_res_time_stamp.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/timing/dom_window_performance.h"
#include "third_party/blink/renderer/core/timing/performance.h"
#include "third_party/blink/renderer/core/timing/window_performance.h"
#include "third_party/blink/renderer/core/timing/worker_global_scope_performance.h"
#include "third_party/blink/renderer/core/workers/worker_global_scope.h"
#include "third_party/blink/renderer/modules/compute_pressure/pressure_observer_manager.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
using device::mojom::blink::PressureSource;
using device::mojom::blink::PressureState;
namespace blink {
namespace {
V8PressureState::Enum PressureStateToV8PressureState(PressureState state) {
switch (state) {
case PressureState::kNominal:
return V8PressureState::Enum::kNominal;
case PressureState::kFair:
return V8PressureState::Enum::kFair;
case PressureState::kSerious:
return V8PressureState::Enum::kSerious;
case PressureState::kCritical:
return V8PressureState::Enum::kCritical;
}
NOTREACHED();
}
V8PressureSource::Enum PressureSourceToV8PressureSource(PressureSource source) {
switch (source) {
case PressureSource::kCpu:
return V8PressureSource::Enum::kCpu;
}
NOTREACHED();
}
} // namespace
PressureClientImpl::PressureClientImpl(ExecutionContext* context,
PressureObserverManager* manager)
: ExecutionContextClient(context),
manager_(manager),
associated_receiver_(this, context) {}
PressureClientImpl::~PressureClientImpl() = default;
void PressureClientImpl::OnPressureUpdated(
mojom::blink::WebPressureUpdatePtr update) {
auto source = PressureSourceToV8PressureSource(update->source);
// New observers may be created and added. Take a snapshot so as
// to safely iterate.
HeapVector<Member<blink::PressureObserver>> observers(observers_);
for (const auto& observer : observers) {
observer->OnUpdate(GetExecutionContext(), source,
PressureStateToV8PressureState(update->state),
update->own_contribution_estimate,
CalculateTimestamp(update->timestamp));
}
}
void PressureClientImpl::AddObserver(PressureObserver* observer) {
observers_.insert(observer);
}
void PressureClientImpl::RemoveObserver(PressureObserver* observer) {
observers_.erase(observer);
if (observers_.empty()) {
Reset();
}
}
mojo::PendingAssociatedRemote<mojom::blink::WebPressureClient>
PressureClientImpl::BindNewEndpointAndPassRemote(
scoped_refptr<base::SequencedTaskRunner> task_runner) {
auto associated_pending_remote =
associated_receiver_.BindNewEndpointAndPassRemote(task_runner);
associated_receiver_.set_disconnect_handler(
WTF::BindOnce(&PressureClientImpl::Reset, WrapWeakPersistent(this)));
return associated_pending_remote;
}
void PressureClientImpl::Reset() {
state_ = State::kUninitialized;
observers_.clear();
associated_receiver_.reset();
}
DOMHighResTimeStamp PressureClientImpl::CalculateTimestamp(
base::TimeTicks timeticks) const {
auto* context = GetExecutionContext();
Performance* performance;
if (auto* window = DynamicTo<LocalDOMWindow>(context); window) {
performance = DOMWindowPerformance::performance(*window);
} else if (auto* worker = DynamicTo<WorkerGlobalScope>(context); worker) {
performance = WorkerGlobalScopePerformance::performance(*worker);
} else {
NOTREACHED();
}
CHECK(performance);
return performance->MonotonicTimeToDOMHighResTimeStamp(timeticks);
}
void PressureClientImpl::Trace(Visitor* visitor) const {
visitor->Trace(associated_receiver_);
visitor->Trace(manager_);
visitor->Trace(observers_);
ExecutionContextClient::Trace(visitor);
}
} // namespace blink
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