gecko-dev/dom/filehandle/MutableFile.h

77 строки
1.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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_MutableFile_h
#define mozilla_dom_MutableFile_h
#include "nsCOMPtr.h"
#include "nsString.h"
class nsIFile;
class nsIOfflineStorage;
namespace mozilla {
namespace dom {
class FileService;
/**
* This class provides a base for MutableFile implementations.
* The subclasses can override implementation of IsInvalid, CreateStream,
* SetThreadLocals and UnsetThreadLocals.
* (for example IDBMutableFile provides IndexedDB specific implementation).
*/
class MutableFileBase
{
friend class FileService;
public:
NS_IMETHOD_(MozExternalRefCountType)
AddRef() = 0;
NS_IMETHOD_(MozExternalRefCountType)
Release() = 0;
virtual bool
IsInvalid()
{
return false;
}
// A temporary method that will be removed along with nsIOfflineStorage
// interface.
virtual nsIOfflineStorage*
Storage() = 0;
virtual already_AddRefed<nsISupports>
CreateStream(bool aReadOnly);
virtual void
SetThreadLocals()
{
}
virtual void
UnsetThreadLocals()
{
}
protected:
MutableFileBase();
virtual ~MutableFileBase();
nsCOMPtr<nsIFile> mFile;
nsCString mStorageId;
nsString mFileName;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_MutableFile_h