gecko-dev/dom/file/FileHandle.h

116 строки
2.5 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_file_filehandle_h__
#define mozilla_dom_file_filehandle_h__
#include "FileCommon.h"
#include "nsIDOMFileHandle.h"
#include "nsIFile.h"
#include "nsIFileStorage.h"
#include "nsDOMEventTargetHelper.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/FileModeBinding.h"
class nsIDOMFile;
class nsIFileStorage;
namespace mozilla {
namespace dom {
class DOMRequest;
} // namespace dom
} // namespace mozilla
BEGIN_FILE_NAMESPACE
class FileService;
class LockedFile;
class FinishHelper;
class FileHelper;
/**
* Must be subclassed. The subclass must implement CreateStream and
* CreateFileObject. Basically, every file storage implementation provides its
* own FileHandle implementation (for example IDBFileHandle provides IndexedDB
* specific implementation).
*/
class FileHandle : public nsDOMEventTargetHelper,
public nsIDOMFileHandle
{
friend class FileService;
friend class LockedFile;
friend class FinishHelper;
friend class FileHelper;
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIDOMFILEHANDLE
nsPIDOMWindow* GetParentObject() const
{
return GetOwner();
}
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
void GetName(nsString& aName) const
{
aName = mName;
}
void GetType(nsString& aType) const
{
aType = mType;
}
already_AddRefed<nsIDOMLockedFile> Open(FileMode aMode, ErrorResult& aError);
already_AddRefed<DOMRequest> GetFile(ErrorResult& aError);
IMPL_EVENT_HANDLER(abort)
IMPL_EVENT_HANDLER(error)
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(FileHandle, nsDOMEventTargetHelper)
const nsAString&
Name() const
{
return mName;
}
const nsAString&
Type() const
{
return mType;
}
virtual already_AddRefed<nsISupports>
CreateStream(nsIFile* aFile, bool aReadOnly) = 0;
virtual already_AddRefed<nsIDOMFile>
CreateFileObject(LockedFile* aLockedFile, uint32_t aFileSize) = 0;
protected:
FileHandle()
{
SetIsDOMBinding();
}
~FileHandle()
{ }
nsCOMPtr<nsIFileStorage> mFileStorage;
nsString mName;
nsString mType;
nsCOMPtr<nsIFile> mFile;
nsString mFileName;
};
END_FILE_NAMESPACE
#endif // mozilla_dom_file_filehandle_h__