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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_FileReader_h
#define mozilla_dom_FileReader_h
#include "mozilla/Attributes.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "nsIAsyncInputStream.h"
#include "nsIInterfaceRequestor.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsWeakReference.h"
#include "WorkerHolder.h"
#define NS_PROGRESS_EVENT_INTERVAL 50
class nsITimer;
class nsIEventTarget;
namespace mozilla {
namespace dom {
class Blob;
class DOMError;
namespace workers {
class WorkerPrivate;
}
extern const uint64_t kUnknownSize;
class FileReaderDecreaseBusyCounter;
class FileReader final : public DOMEventTargetHelper,
public nsIInterfaceRequestor,
public nsSupportsWeakReference,
public nsIInputStreamCallback,
public nsITimerCallback,
public workers::WorkerHolder
{
friend class FileReaderDecreaseBusyCounter;
public:
FileReader(nsIGlobalObject* aGlobal,
workers::WorkerPrivate* aWorkerPrivate);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSITIMERCALLBACK
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(FileReader,
DOMEventTargetHelper)
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
static already_AddRefed<FileReader>
Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
void ReadAsArrayBuffer(JSContext* aCx, Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_ARRAYBUFFER, aRv);
}
void ReadAsText(Blob& aBlob, const nsAString& aLabel, ErrorResult& aRv)
{
ReadFileContent(aBlob, aLabel, FILE_AS_TEXT, aRv);
}
void ReadAsDataURL(Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_DATAURL, aRv);
}
void Abort(ErrorResult& aRv);
uint16_t ReadyState() const
{
return static_cast<uint16_t>(mReadyState);
}
DOMError* GetError() const
{
return mError;
}
void GetResult(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
IMPL_EVENT_HANDLER(loadstart)
IMPL_EVENT_HANDLER(progress)
IMPL_EVENT_HANDLER(load)
IMPL_EVENT_HANDLER(abort)
IMPL_EVENT_HANDLER(error)
IMPL_EVENT_HANDLER(loadend)
void ReadAsBinaryString(Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_BINARY, aRv);
}
// WorkerHolder
bool Notify(workers::Status) override;
private:
virtual ~FileReader();
// This must be in sync with dom/webidl/FileReader.webidl
enum eReadyState {
EMPTY = 0,
LOADING = 1,
DONE = 2
};
enum eDataFormat {
FILE_AS_ARRAYBUFFER,
FILE_AS_BINARY,
FILE_AS_TEXT,
FILE_AS_DATAURL
};
void RootResultArrayBuffer();
void ReadFileContent(Blob& aBlob,
const nsAString &aCharset, eDataFormat aDataFormat,
ErrorResult& aRv);
nsresult GetAsText(Blob *aBlob, const nsACString &aCharset,
const char *aFileData, uint32_t aDataLen,
nsAString &aResult);
nsresult GetAsDataURL(Blob *aBlob, const char *aFileData,
uint32_t aDataLen, nsAString &aResult);
nsresult OnLoadEnd(nsresult aStatus);
void StartProgressEventTimer();
void ClearProgressEventTimer();
void FreeDataAndDispatchSuccess();
void FreeDataAndDispatchError();
void FreeDataAndDispatchError(nsresult aRv);
nsresult DispatchProgressEvent(const nsAString& aType);
nsresult DoAsyncWait();
nsresult DoReadData(uint64_t aCount);
void OnLoadEndArrayBuffer();
void FreeFileData()
{
free(mFileData);
mFileData = nullptr;
mDataLen = 0;
}
nsresult IncreaseBusyCounter();
void DecreaseBusyCounter();
void Shutdown();
char *mFileData;
RefPtr<Blob> mBlob;
nsCString mCharset;
uint32_t mDataLen;
eDataFormat mDataFormat;
nsString mResult;
JS::Heap<JSObject*> mResultArrayBuffer;
nsCOMPtr<nsITimer> mProgressNotifier;
bool mProgressEventWasDelayed;
bool mTimerIsActive;
nsCOMPtr<nsIAsyncInputStream> mAsyncStream;
RefPtr<DOMError> mError;
eReadyState mReadyState;
uint64_t mTotal;
uint64_t mTransferred;
nsCOMPtr<nsIEventTarget> mTarget;
uint64_t mBusyCount;
// Kept alive with a WorkerHolder.
workers::WorkerPrivate* mWorkerPrivate;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_FileReader_h
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