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// Copyright 2019 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/remote_objects/remote_object_gateway_impl.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/modules/remote_objects/remote_object.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_isolate_data.h"
#undef GetObject
namespace blink {
// static
const char RemoteObjectGatewayImpl::kSupplementName[] = "RemoteObjectGateway";
// static
RemoteObjectGatewayImpl* RemoteObjectGatewayImpl::From(LocalFrame& frame) {
return Supplement<LocalFrame>::From<RemoteObjectGatewayImpl>(frame);
}
void RemoteObjectGatewayImpl::InjectNamed(const WTF::String& object_name,
int32_t object_id) {
ScriptState* script_state = ToScriptStateForMainWorld(GetSupplementable());
ScriptState::Scope scope(script_state);
v8::Isolate* isolate = script_state->GetIsolate();
v8::MicrotasksScope microtasks_scope(
isolate, ToMicrotaskQueue(script_state),
v8::MicrotasksScope::kDoNotRunMicrotasks);
v8::Local<v8::Context> context = script_state->GetContext();
if (context.IsEmpty())
return;
remote_objects_.erase(object_id);
RemoteObject* object = GetRemoteObject(isolate, object_id);
v8::Context::Scope context_scope(context);
v8::Local<v8::Object> global = context->Global();
gin::Handle<RemoteObject> controller = gin::CreateHandle(isolate, object);
// WrappableBase instance deletes itself in case of a wrapper
// creation failure, thus there is no need to delete |object|.
if (controller.IsEmpty())
return;
global->Set(context, V8AtomicString(isolate, object_name), controller.ToV8())
.Check();
object_host_->AcquireObject(object_id);
}
// static
void RemoteObjectGatewayImpl::BindMojoReceiver(
LocalFrame* frame,
mojo::PendingRemote<mojom::blink::RemoteObjectHost> host,
mojo::PendingReceiver<mojom::blink::RemoteObjectGateway> receiver) {
if (!frame || !frame->IsAttached())
return;
DCHECK(!RemoteObjectGatewayImpl::From(*frame));
auto* self = MakeGarbageCollected<RemoteObjectGatewayImpl>(
base::PassKey<RemoteObjectGatewayImpl>(), *frame, std::move(receiver),
std::move(host));
Supplement<LocalFrame>::ProvideTo(*frame, self);
}
RemoteObjectGatewayImpl::RemoteObjectGatewayImpl(
base::PassKey<RemoteObjectGatewayImpl>,
LocalFrame& frame,
mojo::PendingReceiver<mojom::blink::RemoteObjectGateway>
object_gateway_receiver,
mojo::PendingRemote<mojom::blink::RemoteObjectHost> object_host_remote)
: Supplement<LocalFrame>(frame),
receiver_(this, frame.DomWindow()),
object_host_(frame.DomWindow()) {
receiver_.Bind(std::move(object_gateway_receiver),
frame.GetTaskRunner(TaskType::kMiscPlatformAPI));
object_host_.Bind(std::move(object_host_remote),
frame.GetTaskRunner(TaskType::kMiscPlatformAPI));
}
void RemoteObjectGatewayImpl::OnClearWindowObjectInMainWorld() {
for (const auto& pair : named_objects_)
InjectNamed(pair.key, pair.value);
}
void RemoteObjectGatewayImpl::Trace(Visitor* visitor) const {
visitor->Trace(receiver_);
visitor->Trace(object_host_);
Supplement<LocalFrame>::Trace(visitor);
}
void RemoteObjectGatewayImpl::AddNamedObject(const WTF::String& name,
int32_t id) {
// Added objects only become available after page reload, so here they
// are only added into the internal map.
named_objects_.insert(name, id);
}
void RemoteObjectGatewayImpl::RemoveNamedObject(const WTF::String& name) {
// Removal becomes in effect on next reload. We simply remove the entry
// from the map here.
auto iter = named_objects_.find(name);
CHECK(iter != named_objects_.end());
named_objects_.erase(iter);
}
void RemoteObjectGatewayImpl::BindRemoteObjectReceiver(
int32_t object_id,
mojo::PendingReceiver<mojom::blink::RemoteObject> receiver) {
object_host_->GetObject(object_id, std::move(receiver));
}
void RemoteObjectGatewayImpl::ReleaseObject(int32_t object_id,
RemoteObject* remote_object) {
auto iter = remote_objects_.find(object_id);
CHECK(iter != remote_objects_.end());
if (iter->value == remote_object)
remote_objects_.erase(iter);
object_host_->ReleaseObject(object_id);
}
RemoteObject* RemoteObjectGatewayImpl::GetRemoteObject(v8::Isolate* isolate,
int32_t object_id) {
auto iter = remote_objects_.find(object_id);
if (iter != remote_objects_.end()) {
// Decrease a reference count in the browser side when we reuse RemoteObject
// getting from the map.
object_host_->ReleaseObject(object_id);
return iter->value;
}
auto* remote_object = new RemoteObject(isolate, this, object_id);
remote_objects_.insert(object_id, remote_object);
return remote_object;
}
// static
const char RemoteObjectGatewayFactoryImpl::kSupplementName[] =
"RemoteObjectGatewayFactoryImpl";
// static
RemoteObjectGatewayFactoryImpl* RemoteObjectGatewayFactoryImpl::From(
LocalFrame& frame) {
return Supplement<LocalFrame>::From<RemoteObjectGatewayFactoryImpl>(frame);
}
// static
void RemoteObjectGatewayFactoryImpl::Bind(
LocalFrame* frame,
mojo::PendingReceiver<mojom::blink::RemoteObjectGatewayFactory> receiver) {
DCHECK(frame);
DCHECK(!RemoteObjectGatewayFactoryImpl::From(*frame));
auto* factory = MakeGarbageCollected<RemoteObjectGatewayFactoryImpl>(
base::PassKey<RemoteObjectGatewayFactoryImpl>(), *frame,
std::move(receiver));
Supplement<LocalFrame>::ProvideTo(*frame, factory);
}
RemoteObjectGatewayFactoryImpl::RemoteObjectGatewayFactoryImpl(
base::PassKey<RemoteObjectGatewayFactoryImpl>,
LocalFrame& frame,
mojo::PendingReceiver<mojom::blink::RemoteObjectGatewayFactory> receiver)
: Supplement<LocalFrame>(frame), receiver_(this, frame.DomWindow()) {
receiver_.Bind(std::move(receiver),
frame.GetTaskRunner(TaskType::kMiscPlatformAPI));
}
void RemoteObjectGatewayFactoryImpl::Trace(Visitor* visitor) const {
visitor->Trace(receiver_);
Supplement<LocalFrame>::Trace(visitor);
}
void RemoteObjectGatewayFactoryImpl::CreateRemoteObjectGateway(
mojo::PendingRemote<mojom::blink::RemoteObjectHost> host,
mojo::PendingReceiver<mojom::blink::RemoteObjectGateway> receiver) {
RemoteObjectGatewayImpl::BindMojoReceiver(
GetSupplementable(), std::move(host), std::move(receiver));
}
} // namespace blink
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