gecko-dev/dom/ipc/JSWindowActorChild.cpp

159 строки
4.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/JSWindowActorBinding.h"
#include "mozilla/dom/JSWindowActorChild.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/WindowProxyHolder.h"
#include "mozilla/dom/MessageManagerBinding.h"
#include "mozilla/dom/BrowsingContext.h"
#include "nsGlobalWindowInner.h"
namespace mozilla {
namespace dom {
JSWindowActorChild::JSWindowActorChild(nsIGlobalObject* aGlobal)
: mGlobal(aGlobal ? aGlobal
: xpc::NativeGlobal(xpc::PrivilegedJunkScope())) {}
JSWindowActorChild::~JSWindowActorChild() { MOZ_ASSERT(!mManager); }
JSObject* JSWindowActorChild::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return JSWindowActorChild_Binding::Wrap(aCx, this, aGivenProto);
}
WindowGlobalChild* JSWindowActorChild::GetManager() const { return mManager; }
void JSWindowActorChild::Init(const nsAString& aName,
WindowGlobalChild* aManager) {
MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorChild twice!");
SetName(aName);
mManager = aManager;
InvokeCallback(CallbackFunction::ActorCreated);
}
namespace {
class AsyncMessageToParent : public Runnable {
public:
AsyncMessageToParent(const JSWindowActorMessageMeta& aMetadata,
ipc::StructuredCloneData&& aData,
WindowGlobalChild* aManager)
: mozilla::Runnable("WindowGlobalParent::HandleAsyncMessage"),
mMetadata(aMetadata),
mData(std::move(aData)),
mManager(aManager) {}
NS_IMETHOD Run() override {
MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread.");
RefPtr<WindowGlobalParent> parent = mManager->GetParentActor();
if (parent) {
parent->ReceiveRawMessage(mMetadata, std::move(mData));
}
return NS_OK;
}
private:
JSWindowActorMessageMeta mMetadata;
ipc::StructuredCloneData mData;
RefPtr<WindowGlobalChild> mManager;
};
} // anonymous namespace
void JSWindowActorChild::SendRawMessage(const JSWindowActorMessageMeta& aMeta,
ipc::StructuredCloneData&& aData,
ErrorResult& aRv) {
if (NS_WARN_IF(!mCanSend || !mManager || !mManager->CanSend())) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mManager->IsInProcess()) {
nsCOMPtr<nsIRunnable> runnable =
new AsyncMessageToParent(aMeta, std::move(aData), mManager);
NS_DispatchToMainThread(runnable.forget());
return;
}
// Cross-process case - send data over WindowGlobalChild to other side.
ClonedMessageData msgData;
ContentChild* cc = ContentChild::GetSingleton();
if (NS_WARN_IF(!aData.BuildClonedMessageDataForChild(cc, msgData))) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
if (NS_WARN_IF(!mManager->SendRawMessage(aMeta, msgData))) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
}
Document* JSWindowActorChild::GetDocument(ErrorResult& aRv) {
if (!mManager) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
nsGlobalWindowInner* window = mManager->WindowGlobal();
return window ? window->GetDocument() : nullptr;
}
BrowsingContext* JSWindowActorChild::GetBrowsingContext(ErrorResult& aRv) {
if (!mManager) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
return mManager->BrowsingContext();
}
nsIDocShell* JSWindowActorChild::GetDocShell(ErrorResult& aRv) {
if (BrowsingContext* bc = GetBrowsingContext(aRv)) {
return bc->GetDocShell();
}
return nullptr;
}
Nullable<WindowProxyHolder> JSWindowActorChild::GetContentWindow(
ErrorResult& aRv) {
if (BrowsingContext* bc = GetBrowsingContext(aRv)) {
return WindowProxyHolder(bc);
}
return nullptr;
}
void JSWindowActorChild::StartDestroy() {
JSWindowActor::StartDestroy();
mCanSend = false;
}
void JSWindowActorChild::AfterDestroy() {
JSWindowActor::AfterDestroy();
mManager = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(JSWindowActorChild, JSWindowActor, mManager)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(JSWindowActorChild,
JSWindowActor)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSWindowActorChild)
NS_INTERFACE_MAP_END_INHERITING(JSWindowActor)
NS_IMPL_ADDREF_INHERITED(JSWindowActorChild, JSWindowActor)
NS_IMPL_RELEASE_INHERITED(JSWindowActorChild, JSWindowActor)
} // namespace dom
} // namespace mozilla