gecko-dev/dom/ipc/JSWindowActorChild.cpp

123 строки
4.1 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/WindowGlobalChild.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/MessageManagerBinding.h"
namespace mozilla {
namespace dom {
JSObject* JSWindowActorChild::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return JSWindowActorChild_Binding::Wrap(aCx, this, aGivenProto);
}
WindowGlobalChild* JSWindowActorChild::Manager() const { return mManager; }
void JSWindowActorChild::Init(const nsAString& aName,
WindowGlobalChild* aManager) {
MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorChild twice!");
mName = aName;
mManager = aManager;
}
nsISupports* JSWindowActorChild::GetParentObject() const {
return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
}
namespace {
class AsyncMessageToParent : public Runnable {
public:
AsyncMessageToParent(const nsAString& aActorName,
const nsAString& aMessageName,
ipc::StructuredCloneData&& aData,
WindowGlobalParent* aParent)
: mozilla::Runnable("WindowGlobalParent::HandleAsyncMessage"),
mActorName(aActorName),
mMessageName(aMessageName),
mData(std::move(aData)),
mParent(aParent) {}
NS_IMETHOD Run() override {
MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread.");
mParent->HandleAsyncMessage(mActorName, mMessageName, mData);
return NS_OK;
}
private:
nsString mActorName;
nsString mMessageName;
ipc::StructuredCloneData mData;
RefPtr<WindowGlobalParent> mParent;
};
} // anonymous namespace
void JSWindowActorChild::SendAsyncMessage(JSContext* aCx,
const nsAString& aMessageName,
JS::Handle<JS::Value> aObj,
JS::Handle<JS::Value> aTransfers,
ErrorResult& aRv) {
// If we've closed our channel already, just raise an exception.
if (NS_WARN_IF(mManager->IsClosed())) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// Serialize our object out to a StructuredCloneData.
ipc::StructuredCloneData data;
if (!aObj.isUndefined() && !nsFrameMessageManager::GetParamsForMessage(
aCx, aObj, aTransfers, data)) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
// If we're an in-process, asynchronously fire off the callback for in-process
// loads.
if (mManager->IsInProcess()) {
RefPtr<WindowGlobalParent> parent = mManager->GetParentActor();
RefPtr<AsyncMessageToParent> ev =
new AsyncMessageToParent(mName, aMessageName, std::move(data), parent);
DebugOnly<nsresult> rv = NS_DispatchToMainThread(ev);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"JS Window Actor AsyncMessageToParent dispatch failed");
return;
}
// If we're a cross-process, send the async message over the corresponding
// actor.
ClonedMessageData msgData;
ContentChild* cc = ContentChild::GetSingleton();
if (!data.BuildClonedMessageDataForChild(cc, msgData)) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
if (!mManager->SendAsyncMessage(mName, PromiseFlatString(aMessageName),
msgData)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSWindowActorChild)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(JSWindowActorChild)
NS_IMPL_CYCLE_COLLECTING_RELEASE(JSWindowActorChild)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(JSWindowActorChild, mManager)
} // namespace dom
} // namespace mozilla