gecko-dev/dom/base/FileIOObject.h

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2.7 KiB
C
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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: */
2012-05-21 15:12:37 +04:00
/* 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 FileIOObject_h__
#define FileIOObject_h__
#include "mozilla/DOMEventTargetHelper.h"
#include "nsIFile.h"
#include "nsITimer.h"
#include "nsCOMPtr.h"
#include "nsIAsyncInputStream.h"
#include "mozilla/dom/DOMError.h"
#define NS_PROGRESS_EVENT_INTERVAL 50
namespace mozilla {
class ErrorResult;
namespace dom {
extern const uint64_t kUnknownSize;
// A common base class for FileReader and FileSaver
class FileIOObject : public DOMEventTargetHelper,
public nsIInputStreamCallback,
public nsITimerCallback
{
public:
FileIOObject();
NS_DECL_ISUPPORTS_INHERITED
// Common methods
void Abort(ErrorResult& aRv);
uint16_t ReadyState() const
{
return mReadyState;
}
DOMError* GetError() const
{
return mError;
}
NS_METHOD GetOnabort(JSContext* aCx, JS::MutableHandle<JS::Value> aValue);
NS_METHOD SetOnabort(JSContext* aCx, JS::Handle<JS::Value> aValue);
NS_METHOD GetOnerror(JSContext* aCx, JS::MutableHandle<JS::Value> aValue);
NS_METHOD SetOnerror(JSContext* aCx, JS::Handle<JS::Value> aValue);
NS_METHOD GetOnprogress(JSContext* aCx, JS::MutableHandle<JS::Value> aValue);
NS_METHOD SetOnprogress(JSContext* aCx, JS::Handle<JS::Value> aValue);
IMPL_EVENT_HANDLER(abort)
IMPL_EVENT_HANDLER(error)
IMPL_EVENT_HANDLER(progress)
NS_DECL_NSITIMERCALLBACK
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(FileIOObject, DOMEventTargetHelper)
protected:
virtual ~FileIOObject();
// Implemented by the derived class to do whatever it needs to do for abort
virtual void DoAbort(nsAString& aEvent) = 0;
virtual nsresult DoReadData(nsIAsyncInputStream* aStream, uint64_t aCount) = 0;
virtual nsresult DoOnLoadEnd(nsresult aStatus, nsAString& aSuccessEvent,
nsAString& aTerminationEvent) = 0;
nsresult OnLoadEnd(nsresult aStatus);
nsresult DoAsyncWait(nsIAsyncInputStream* aStream);
void StartProgressEventTimer();
void ClearProgressEventTimer();
void DispatchError(nsresult rv, nsAString& finalEvent);
nsresult DispatchProgressEvent(const nsAString& aType);
nsCOMPtr<nsITimer> mProgressNotifier;
bool mProgressEventWasDelayed;
bool mTimerIsActive;
nsCOMPtr<nsIAsyncInputStream> mAsyncStream;
nsRefPtr<DOMError> mError;
uint16_t mReadyState;
uint64_t mTotal;
uint64_t mTransferred;
};
} // namespace dom
} // namespace mozilla
#endif