Quelle  JSProcessActorParent.cpp

/* 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/JSProcessActorParent.h"

#include "mozilla/dom/InProcessChild.h"
#include "mozilla/dom/InProcessParent.h"
#include "mozilla/dom/JSIPCValue.h"
#include "mozilla/dom/JSIPCValueUtils.h"
#include "mozilla/dom/JSProcessActorBinding.h"

namespace mozilla::dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED(JSProcessActorParent, JSActor, mManager)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSProcessActorParent)
NS_INTERFACE_MAP_END_INHERITING(JSActor)

NS_IMPL_ADDREF_INHERITED(JSProcessActorParent, JSActor)
NS_IMPL_RELEASE_INHERITED(JSProcessActorParent, JSActor)

JSObject* JSProcessActorParent::WrapObject(JSContext* aCx,
                                           JS::Handle<JSObject*> aGivenProto) {
  return JSProcessActorParent_Binding::Wrap(aCx, this, aGivenProto);
}

void JSProcessActorParent::Init(const nsACString& aName,
                                nsIDOMProcessParent* aManager) {
  MOZ_ASSERT(!mManager, "Cannot Init() a JSProcessActorParent twice!");
  mManager = aManager;
  JSActor::Init(aName, /* aSendTyped= */ false);
}

JSProcessActorParent::~JSProcessActorParent() { MOZ_ASSERT(!mManager); }

void JSProcessActorParent::SendRawMessage(const JSActorMessageMeta& aMeta,
                                          JSIPCValue&& aData,
                                          ipc::StructuredCloneData* aStack,
                                          ErrorResult& aRv) {
  if (NS_WARN_IF(!CanSend() || !mManager || !mManager->GetCanSend())) {
    aRv.ThrowInvalidStateError(
        nsPrintfCString("Actor '%s' cannot send message '%s' during shutdown.",
                        PromiseFlatCString(aMeta.actorName()).get(),
                        NS_ConvertUTF16toUTF8(aMeta.messageName()).get()));
    return;
  }

  // If the parent side is in the same process, we have a PInProcess manager,
  // and can dispatch the message directly to the event loop.
  ContentParent* contentParent = mManager->AsContentParent();
  if (!contentParent) {
    SendRawMessageInProcess(aMeta, std::move(aData), std::move(aStack), []() {
      return do_AddRef(InProcessChild::Singleton());
    });
    return;
  }

  if (NS_WARN_IF(!contentParent->SendRawMessage(aMeta, aData, aStack))) {
    aRv.ThrowOperationError(
        nsPrintfCString("JSProcessActorParent send error in actor '%s'",
                        PromiseFlatCString(aMeta.actorName()).get()));
    return;
  }
}

void JSProcessActorParent::ClearManager() { mManager = nullptr; }

}  // namespace mozilla::dom