gecko-dev/dom/indexedDB/IDBFileHandle.h
2015-05-03 15:32:37 -04:00

148 lines
3.6 KiB
C++

/* -*- 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_indexeddb_idbfilehandle_h__
#define mozilla_dom_indexeddb_idbfilehandle_h__
#include "IDBFileRequest.h"
#include "js/TypeDecls.h"
#include "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/FileHandle.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "nsCycleCollectionParticipant.h"
#include "nsWeakReference.h"
class nsPIDOMWindow;
namespace mozilla {
namespace dom {
struct IDBFileMetadataParameters;
namespace indexedDB {
class IDBMutableFile;
class IDBFileHandle final : public DOMEventTargetHelper,
public nsIRunnable,
public FileHandleBase,
public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIRUNNABLE
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(IDBFileHandle, DOMEventTargetHelper)
static already_AddRefed<IDBFileHandle>
Create(FileMode aMode,
RequestMode aRequestMode,
IDBMutableFile* aMutableFile);
virtual MutableFileBase*
MutableFile() const override;
// nsIDOMEventTarget
virtual nsresult
PreHandleEvent(EventChainPreVisitor& aVisitor) override;
// WrapperCache
virtual JSObject*
WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
nsPIDOMWindow*
GetParentObject() const
{
return GetOwner();
}
IDBMutableFile*
GetMutableFile() const
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
return mMutableFile;
}
IDBMutableFile*
GetFileHandle() const
{
return GetMutableFile();
}
already_AddRefed<IDBFileRequest>
GetMetadata(const IDBFileMetadataParameters& aParameters, ErrorResult& aRv);
already_AddRefed<IDBFileRequest>
ReadAsArrayBuffer(uint64_t aSize, ErrorResult& aRv)
{
return Read(aSize, false, NullString(), aRv).downcast<IDBFileRequest>();
}
already_AddRefed<IDBFileRequest>
ReadAsText(uint64_t aSize, const nsAString& aEncoding, ErrorResult& aRv)
{
return Read(aSize, true, aEncoding, aRv).downcast<IDBFileRequest>();
}
template<class T>
already_AddRefed<IDBFileRequest>
Write(const T& aValue, ErrorResult& aRv)
{
return
WriteOrAppend(aValue, false, aRv).template downcast<IDBFileRequest>();
}
template<class T>
already_AddRefed<IDBFileRequest>
Append(const T& aValue, ErrorResult& aRv)
{
return WriteOrAppend(aValue, true, aRv).template downcast<IDBFileRequest>();
}
already_AddRefed<IDBFileRequest>
Truncate(const Optional<uint64_t>& aSize, ErrorResult& aRv)
{
return FileHandleBase::Truncate(aSize, aRv).downcast<IDBFileRequest>();
}
already_AddRefed<IDBFileRequest>
Flush(ErrorResult& aRv)
{
return FileHandleBase::Flush(aRv).downcast<IDBFileRequest>();
}
IMPL_EVENT_HANDLER(complete)
IMPL_EVENT_HANDLER(abort)
IMPL_EVENT_HANDLER(error)
private:
IDBFileHandle(FileMode aMode,
RequestMode aRequestMode,
IDBMutableFile* aMutableFile);
~IDBFileHandle();
virtual nsresult
OnCompleteOrAbort(bool aAborted) override;
virtual bool
CheckWindow() override;
virtual already_AddRefed<FileRequestBase>
GenerateFileRequest() override;
nsRefPtr<IDBMutableFile> mMutableFile;
};
} // namespace indexedDB
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_indexeddb_idbfilehandle_h__