/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 "ContentProcessMessageManager.h"

#include "nsContentCID.h"

#include "mozilla/dom/ContentChild.h"

#include "mozilla/dom/MessageManagerBinding.h"

#include "mozilla/dom/ParentProcessMessageManager.h"

#include "mozilla/dom/ResolveSystemBinding.h"

#include "mozilla/dom/ScriptSettings.h"

#include "mozilla/dom/ipc/SharedMap.h"

using namespace mozilla;

using namespace mozilla::dom;

bool ContentProcessMessageManager::sWasCreated = false;

ContentProcessMessageManager::ContentProcessMessageManager(nsFrameMessageManager* aMessageManager)

 : MessageManagerGlobal(aMessageManager),

   mInitialized(false)

{

  mozilla::HoldJSObjects(this);

}

ContentProcessMessageManager::~ContentProcessMessageManager()

{

  mAnonymousGlobalScopes.Clear();

  mozilla::DropJSObjects(this);

}

ContentProcessMessageManager*

ContentProcessMessageManager::Get()

{

  nsCOMPtr<nsIMessageSender> service = do_GetService(NS_CHILDPROCESSMESSAGEMANAGER_CONTRACTID);

  if (!service) {

    return nullptr;

  }

  sWasCreated = true;

  return static_cast<ContentProcessMessageManager*>(service.get());

}

already_AddRefed<mozilla::dom::ipc::SharedMap>

ContentProcessMessageManager::SharedData()

{

  if (ContentChild* child = ContentChild::GetSingleton()) {

    return do_AddRef(child->SharedData());

  }

  auto* ppmm = nsFrameMessageManager::sParentProcessManager;

  return do_AddRef(ppmm->SharedData()->GetReadOnly());

}

bool

ContentProcessMessageManager::WasCreated()

{

  return sWasCreated;

}

void

ContentProcessMessageManager::MarkForCC()

{

  MarkScopesForCC();

  MessageManagerGlobal::MarkForCC();

}

NS_IMPL_CYCLE_COLLECTION_CLASS(ContentProcessMessageManager)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ContentProcessMessageManager)

  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMessageManager)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ContentProcessMessageManager)

  NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER

  tmp->nsMessageManagerScriptExecutor::Trace(aCallbacks, aClosure);

NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ContentProcessMessageManager)

  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER

  NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessageManager)

  tmp->nsMessageManagerScriptExecutor::Unlink();

NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ContentProcessMessageManager)

  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY

  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMessageSender)

  NS_INTERFACE_MAP_ENTRY(nsIMessageSender)

  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)

NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(ContentProcessMessageManager)

NS_IMPL_CYCLE_COLLECTING_RELEASE(ContentProcessMessageManager)

bool

ContentProcessMessageManager::Init()

{

  if (mInitialized) {

    return true;

  }

  mInitialized = true;

  return nsMessageManagerScriptExecutor::Init();

}

JSObject*

ContentProcessMessageManager::WrapObject(JSContext* aCx,

                                         JS::Handle<JSObject*> aGivenProto)

{

  return ContentProcessMessageManager_Binding::Wrap(aCx, this, aGivenProto);

}

JSObject*

ContentProcessMessageManager::GetOrCreateWrapper()

{

  JS::RootedValue val(RootingCx());

  {

    // Scope to run ~AutoJSAPI before working with a raw JSObject*.

    AutoJSAPI jsapi;

    jsapi.Init();

    if (!GetOrCreateDOMReflectorNoWrap(jsapi.cx(), this, &val)) {

      return nullptr;

    }

  }

  MOZ_ASSERT(val.isObject());

  return &val.toObject();

}

void

ContentProcessMessageManager::LoadScript(const nsAString& aURL)

{

  Init();

  JS::Rooted<JSObject*> messageManager(mozilla::dom::RootingCx(), GetOrCreateWrapper());

  LoadScriptInternal(messageManager, aURL, true);

}

void

ContentProcessMessageManager::SetInitialProcessData(JS::HandleValue aInitialData)

{

  mMessageManager->SetInitialProcessData(aInitialData);

}