gecko-dev/dom/base/nsDOMFileReader.h

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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 nsDOMFileReader_h__
#define nsDOMFileReader_h__
#include "mozilla/Attributes.h"
#include "nsISupportsUtils.h"
#include "nsString.h"
#include "nsWeakReference.h"
#include "nsIStreamListener.h"
#include "nsIInterfaceRequestor.h"
#include "nsJSUtils.h"
#include "nsTArray.h"
#include "prtime.h"
#include "nsITimer.h"
#include "nsIAsyncInputStream.h"
#include "nsIDOMFileReader.h"
#include "nsIDOMFileList.h"
#include "nsCOMPtr.h"
#include "FileIOObject.h"
namespace mozilla {
namespace dom {
class Blob;
} // namespace dom
} // namespace mozilla
class nsDOMFileReader final : public mozilla::dom::FileIOObject,
public nsIDOMFileReader,
public nsIInterfaceRequestor,
public nsSupportsWeakReference
{
typedef mozilla::ErrorResult ErrorResult;
typedef mozilla::dom::GlobalObject GlobalObject;
typedef mozilla::dom::Blob Blob;
public:
nsDOMFileReader();
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIDOMFILEREADER
NS_REALLY_FORWARD_NSIDOMEVENTTARGET(mozilla::DOMEventTargetHelper)
// nsIInterfaceRequestor
NS_DECL_NSIINTERFACEREQUESTOR
// FileIOObject overrides
virtual void DoAbort(nsAString& aEvent) override;
virtual nsresult DoReadData(nsIAsyncInputStream* aStream, uint64_t aCount) override;
virtual nsresult DoOnLoadEnd(nsresult aStatus, nsAString& aSuccessEvent,
nsAString& aTerminationEvent) override;
nsPIDOMWindow* GetParentObject() const
{
return GetOwner();
}
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
static already_AddRefed<nsDOMFileReader>
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);
}
using FileIOObject::Abort;
// Inherited ReadyState().
void GetResult(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
using FileIOObject::GetError;
IMPL_EVENT_HANDLER(loadstart)
using FileIOObject::GetOnprogress;
using FileIOObject::SetOnprogress;
IMPL_EVENT_HANDLER(load)
using FileIOObject::GetOnabort;
using FileIOObject::SetOnabort;
using FileIOObject::GetOnerror;
using FileIOObject::SetOnerror;
IMPL_EVENT_HANDLER(loadend)
void ReadAsBinaryString(Blob& aBlob, ErrorResult& aRv)
{
ReadFileContent(aBlob, EmptyString(), FILE_AS_BINARY, aRv);
}
nsresult Init();
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(nsDOMFileReader,
FileIOObject)
void RootResultArrayBuffer();
protected:
virtual ~nsDOMFileReader();
enum eDataFormat {
FILE_AS_ARRAYBUFFER,
FILE_AS_BINARY,
FILE_AS_TEXT,
FILE_AS_DATAURL
};
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);
void FreeFileData() {
free(mFileData);
mFileData = nullptr;
mDataLen = 0;
}
char *mFileData;
nsRefPtr<Blob> mBlob;
nsCString mCharset;
uint32_t mDataLen;
eDataFormat mDataFormat;
nsString mResult;
JS::Heap<JSObject*> mResultArrayBuffer;
};
#endif