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// Copyright 2015 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_controller.h"
#include <memory>
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/modules/presentation/presentation_availability_observer.h"
#include "third_party/blink/renderer/modules/presentation/presentation_availability_state.h"
#include "third_party/blink/renderer/modules/presentation/presentation_connection.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
namespace blink {
PresentationController::PresentationController(LocalDOMWindow& window)
: Supplement<LocalDOMWindow>(window),
presentation_service_remote_(&window),
presentation_controller_receiver_(this, &window) {}
PresentationController::~PresentationController() = default;
// static
const char PresentationController::kSupplementName[] = "PresentationController";
// static
PresentationController* PresentationController::From(LocalDOMWindow& window) {
PresentationController* controller =
Supplement<LocalDOMWindow>::From<PresentationController>(window);
if (!controller) {
controller = MakeGarbageCollected<PresentationController>(window);
Supplement<LocalDOMWindow>::ProvideTo(window, controller);
}
return controller;
}
// static
PresentationController* PresentationController::FromContext(
ExecutionContext* execution_context) {
if (!execution_context || execution_context->IsContextDestroyed()) {
return nullptr;
}
return From(*To<LocalDOMWindow>(execution_context));
}
void PresentationController::Trace(Visitor* visitor) const {
visitor->Trace(presentation_controller_receiver_);
visitor->Trace(presentation_);
visitor->Trace(connections_);
visitor->Trace(availability_state_);
visitor->Trace(presentation_service_remote_);
Supplement<LocalDOMWindow>::Trace(visitor);
}
void PresentationController::SetPresentation(Presentation* presentation) {
presentation_ = presentation;
}
void PresentationController::RegisterConnection(
ControllerPresentationConnection* connection) {
connections_.insert(connection);
}
PresentationAvailabilityState* PresentationController::GetAvailabilityState() {
if (!availability_state_) {
availability_state_ = MakeGarbageCollected<PresentationAvailabilityState>(
GetPresentationService().get());
}
return availability_state_.Get();
}
void PresentationController::AddAvailabilityObserver(
PresentationAvailabilityObserver* observer) {
GetAvailabilityState()->AddObserver(observer);
}
void PresentationController::RemoveAvailabilityObserver(
PresentationAvailabilityObserver* observer) {
GetAvailabilityState()->RemoveObserver(observer);
}
void PresentationController::OnScreenAvailabilityUpdated(
const KURL& url,
mojom::blink::ScreenAvailability availability) {
GetAvailabilityState()->UpdateAvailability(url, availability);
}
void PresentationController::OnConnectionStateChanged(
mojom::blink::PresentationInfoPtr presentation_info,
mojom::blink::PresentationConnectionState state) {
PresentationConnection* connection = FindConnection(*presentation_info);
if (!connection) {
return;
}
connection->DidChangeState(state);
}
void PresentationController::OnConnectionClosed(
mojom::blink::PresentationInfoPtr presentation_info,
mojom::blink::PresentationConnectionCloseReason reason,
const String& message) {
PresentationConnection* connection = FindConnection(*presentation_info);
if (!connection) {
return;
}
connection->DidClose(reason, message);
}
void PresentationController::OnDefaultPresentationStarted(
mojom::blink::PresentationConnectionResultPtr result) {
DCHECK(result);
DCHECK(result->presentation_info);
DCHECK(result->connection_remote && result->connection_receiver);
if (!presentation_ || !presentation_->defaultRequest()) {
return;
}
auto* connection = ControllerPresentationConnection::Create(
this, *result->presentation_info, presentation_->defaultRequest());
// TODO(btolsch): Convert this and similar calls to just use InterfacePtrInfo
// instead of constructing an InterfacePtr every time we have
// InterfacePtrInfo.
connection->Init(std::move(result->connection_remote),
std::move(result->connection_receiver));
}
ControllerPresentationConnection*
PresentationController::FindExistingConnection(
const std::vector<blink::WebURL>& presentation_urls,
const WebString& presentation_id) {
for (const auto& connection : connections_) {
for (const auto& presentation_url : presentation_urls) {
if (connection->GetState() !=
mojom::blink::PresentationConnectionState::TERMINATED &&
connection->Matches(presentation_id, presentation_url)) {
return connection.Get();
}
}
}
return nullptr;
}
HeapMojoRemote<mojom::blink::PresentationService>&
PresentationController::GetPresentationService() {
if (!presentation_service_remote_ && GetSupplementable()) {
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
GetSupplementable()->GetTaskRunner(TaskType::kPresentation);
GetSupplementable()->GetBrowserInterfaceBroker().GetInterface(
presentation_service_remote_.BindNewPipeAndPassReceiver(task_runner));
// Note: `presentation_controller_receiver_` should always be unbound in
// production. But sometimes it might be bound during tests, as it means the
// controller remote was unbound, the controller receiver remains bound and
// the controller hasn't been GCed.
if (!presentation_controller_receiver_.is_bound()) {
presentation_service_remote_->SetController(
presentation_controller_receiver_.BindNewPipeAndPassRemote(
task_runner));
}
}
return presentation_service_remote_;
}
ControllerPresentationConnection* PresentationController::FindConnection(
const mojom::blink::PresentationInfo& presentation_info) const {
for (const auto& connection : connections_) {
if (connection->Matches(presentation_info.id, presentation_info.url)) {
return connection.Get();
}
}
return nullptr;
}
} // namespace blink
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