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// Copyright 2014 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/presentation/presentation_availability.h"
#include "third_party/blink/public/mojom/frame/lifecycle.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/dom/events/event.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/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/modules/event_target_modules_names.h"
#include "third_party/blink/renderer/modules/presentation/presentation_availability_state.h"
#include "third_party/blink/renderer/modules/presentation/presentation_controller.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
namespace blink {
// static
PresentationAvailability* PresentationAvailability::Take(
ExecutionContext* context,
const WTF::Vector<KURL>& urls,
bool value) {
PresentationAvailability* presentation_availability =
MakeGarbageCollected<PresentationAvailability>(context, urls, value);
presentation_availability->UpdateListening();
return presentation_availability;
}
PresentationAvailability::PresentationAvailability(
ExecutionContext* execution_context,
const WTF::Vector<KURL>& urls,
bool value)
: ActiveScriptWrappable<PresentationAvailability>({}),
ExecutionContextLifecycleStateObserver(execution_context),
PageVisibilityObserver(
To<LocalDOMWindow>(execution_context)->GetFrame()->GetPage()),
urls_(urls),
value_(value),
state_(State::kActive) {
UpdateStateIfNeeded();
}
PresentationAvailability::~PresentationAvailability() = default;
const AtomicString& PresentationAvailability::InterfaceName() const {
return event_target_names::kPresentationAvailability;
}
ExecutionContext* PresentationAvailability::GetExecutionContext() const {
return ExecutionContextLifecycleStateObserver::GetExecutionContext();
}
void PresentationAvailability::AddedEventListener(
const AtomicString& event_type,
RegisteredEventListener& registered_listener) {
EventTarget::AddedEventListener(event_type, registered_listener);
if (event_type == event_type_names::kChange) {
UseCounter::Count(GetExecutionContext(),
WebFeature::kPresentationAvailabilityChangeEventListener);
}
}
void PresentationAvailability::AvailabilityChanged(
blink::mojom::ScreenAvailability availability) {
bool value = availability == blink::mojom::ScreenAvailability::AVAILABLE;
if (value_ == value) {
return;
}
value_ = value;
DispatchEvent(*Event::Create(event_type_names::kChange));
}
bool PresentationAvailability::HasPendingActivity() const {
return state_ != State::kInactive;
}
void PresentationAvailability::ContextLifecycleStateChanged(
mojom::FrameLifecycleState state) {
if (state == mojom::blink::FrameLifecycleState::kRunning) {
SetState(State::kActive);
} else {
SetState(State::kSuspended);
}
}
void PresentationAvailability::ContextDestroyed() {
SetState(State::kInactive);
}
void PresentationAvailability::PageVisibilityChanged() {
if (state_ == State::kInactive) {
return;
}
UpdateListening();
}
void PresentationAvailability::SetState(State state) {
state_ = state;
UpdateListening();
}
void PresentationAvailability::UpdateListening() {
PresentationController* controller =
PresentationController::FromContext(GetExecutionContext());
if (!controller) {
return;
}
if (state_ == State::kActive && (To<LocalDOMWindow>(GetExecutionContext())
->document()
->IsPageVisible())) {
controller->GetAvailabilityState()->AddObserver(this);
} else {
controller->GetAvailabilityState()->RemoveObserver(this);
}
}
const Vector<KURL>& PresentationAvailability::Urls() const {
return urls_;
}
void PresentationAvailability::AddResolver(
ScriptPromiseResolver<PresentationAvailability>* resolver) {
availability_resolvers_.push_back(resolver);
}
void PresentationAvailability::RejectPendingPromises() {
for (auto& resolver : availability_resolvers_) {
resolver->RejectWithDOMException(DOMExceptionCode::kNotSupportedError,
kNotSupportedErrorInfo);
}
availability_resolvers_.clear();
}
void PresentationAvailability::ResolvePendingPromises() {
for (auto& resolver : availability_resolvers_) {
resolver->Resolve(this);
}
availability_resolvers_.clear();
}
void PresentationAvailability::Trace(Visitor* visitor) const {
EventTarget::Trace(visitor);
PageVisibilityObserver::Trace(visitor);
ExecutionContextLifecycleStateObserver::Trace(visitor);
visitor->Trace(availability_resolvers_);
}
} // namespace blink
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