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/* -*- 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/. */
#ifndef mozilla_dom_ContentProcessMessageManager_h
#define mozilla_dom_ContentProcessMessageManager_h
#include "mozilla/Attributes.h"
#include "mozilla/dom/MessageManagerGlobal.h"
#include "mozilla/dom/MessageManagerCallback.h"
#include "nsCOMPtr.h"
#include "nsIScriptContext.h"
#include "nsServiceManagerUtils.h"
#include "nsWeakReference.h"
#include "nsWrapperCache.h"
#include "xpcpublic.h"
class nsFrameMessageManager;
namespace mozilla::dom {
namespace ipc {
class SharedMap;
}
/**
* This class implements a singleton process message manager for content
* processes. Each child process has exactly one instance of this class, which
* hosts the process's process scripts, and may exchange messages with its
* corresponding ParentProcessMessageManager on the parent side.
*/
class ContentProcessMessageManager : public nsIMessageSender,
public nsMessageManagerScriptExecutor,
public nsSupportsWeakReference,
public ipc::MessageManagerCallback,
public MessageManagerGlobal,
public nsWrapperCache {
public:
explicit ContentProcessMessageManager(nsFrameMessageManager* aMessageManager);
using ipc::MessageManagerCallback::GetProcessMessageManager;
using MessageManagerGlobal::GetProcessMessageManager;
bool Init();
static ContentProcessMessageManager* Get();
static bool WasCreated();
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(
ContentProcessMessageManager, nsIMessageSender)
void MarkForCC();
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
JSObject* GetOrCreateWrapper();
using MessageManagerGlobal::AddMessageListener;
using MessageManagerGlobal::AddWeakMessageListener;
using MessageManagerGlobal::RemoveMessageListener;
using MessageManagerGlobal::RemoveWeakMessageListener;
// ContentProcessMessageManager
void GetInitialProcessData(JSContext* aCx,
JS::MutableHandle<JS::Value> aInitialProcessData,
ErrorResult& aError) {
if (!mMessageManager) {
aError.Throw(NS_ERROR_NOT_INITIALIZED);
return;
}
mMessageManager->GetInitialProcessData(aCx, aInitialProcessData, aError);
}
already_AddRefed<ipc::SharedMap> GetSharedData();
NS_FORWARD_SAFE_NSIMESSAGESENDER(mMessageManager)
nsIGlobalObject* GetParentObject() const {
return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
}
virtual void LoadScript(const nsAString& aURL);
bool IsProcessScoped() const override { return true; }
void SetInitialProcessData(JS::Handle<JS::Value> aInitialData);
protected:
virtual ~ContentProcessMessageManager();
private:
bool mInitialized;
static bool sWasCreated;
};
} // namespace mozilla::dom
#endif // mozilla_dom_ContentProcessMessageManager_h
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