зеркало из https://github.com/mozilla/gecko-dev.git
118 строки
4.0 KiB
C++
118 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/JSWindowActorBinding.h"
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#include "mozilla/dom/JSWindowActorChild.h"
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#include "mozilla/dom/WindowGlobalChild.h"
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#include "mozilla/dom/WindowGlobalParent.h"
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#include "mozilla/dom/MessageManagerBinding.h"
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namespace mozilla {
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namespace dom {
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JSObject* JSWindowActorChild::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return JSWindowActorChild_Binding::Wrap(aCx, this, aGivenProto);
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}
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WindowGlobalChild* JSWindowActorChild::Manager() const { return mManager; }
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void JSWindowActorChild::Init(const nsAString& aName,
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WindowGlobalChild* aManager) {
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MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorChild twice!");
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mName = aName;
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mManager = aManager;
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}
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nsISupports* JSWindowActorChild::GetParentObject() const {
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return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
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}
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namespace {
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class AsyncMessageToParent : public Runnable {
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public:
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AsyncMessageToParent(const nsAString& aActorName,
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const nsAString& aMessageName,
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ipc::StructuredCloneData&& aData,
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WindowGlobalParent* aParent)
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: mozilla::Runnable("WindowGlobalParent::HandleAsyncMessage"),
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mActorName(aActorName),
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mMessageName(aMessageName),
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mData(std::move(aData)),
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mParent(aParent) {}
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NS_IMETHOD Run() override {
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MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread.");
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mParent->HandleAsyncMessage(mActorName, mMessageName, mData);
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return NS_OK;
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}
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private:
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nsString mActorName;
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nsString mMessageName;
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ipc::StructuredCloneData mData;
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RefPtr<WindowGlobalParent> mParent;
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};
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} // anonymous namespace
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void JSWindowActorChild::SendAsyncMessage(JSContext* aCx,
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const nsAString& aMessageName,
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JS::Handle<JS::Value> aObj,
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JS::Handle<JS::Value> aTransfers,
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ErrorResult& aRv) {
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// If we've closed our channel already, just raise an exception.
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if (NS_WARN_IF(mManager->IsClosed())) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return;
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}
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// Serialize our object out to a StructuredCloneData.
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ipc::StructuredCloneData data;
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if (!aObj.isUndefined() && !nsFrameMessageManager::GetParamsForMessage(
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aCx, aObj, aTransfers, data)) {
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aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
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return;
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}
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// If we're an in-process, asynchronously fire off the callback for in-process
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// loads.
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if (mManager->IsInProcess()) {
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RefPtr<WindowGlobalParent> parent = mManager->GetParentActor();
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RefPtr<AsyncMessageToParent> ev =
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new AsyncMessageToParent(mName, aMessageName, std::move(data), parent);
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DebugOnly<nsresult> rv = NS_DispatchToMainThread(ev);
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NS_WARNING_ASSERTION(
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NS_SUCCEEDED(rv),
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"JS Window Actor AsyncMessageToParent dispatch failed");
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return;
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}
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// If we're a cross-process, send the async message over the corresponding
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// actor.
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ClonedMessageData msgData;
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ContentChild* cc = ContentChild::GetSingleton();
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if (!data.BuildClonedMessageDataForChild(cc, msgData)) {
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aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
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return;
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}
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if (!mManager->SendAsyncMessage(mName, PromiseFlatString(aMessageName),
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msgData)) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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}
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(JSWindowActorChild, mManager)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(JSWindowActorChild, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(JSWindowActorChild, Release)
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} // namespace dom
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} // namespace mozilla
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