gecko-dev/dom/file/FileReaderSync.h

/* -*- 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_filereadersync_h__
#define mozilla_dom_filereadersync_h__

#include "mozilla/dom/WorkerCommon.h"
#include "nsISupports.h"

class nsIInputStream;

namespace mozilla {
class ErrorResult;

namespace dom {
class Blob;
class GlobalObject;
template <typename>
class Optional;

class FileReaderSync final {
  NS_INLINE_DECL_REFCOUNTING(FileReaderSync)

 private:
  // Private destructor, to discourage deletion outside of Release():
  ~FileReaderSync() = default;

  nsresult ConvertStream(nsIInputStream* aStream, const char* aCharset,
                         nsAString& aResult);

  nsresult ConvertAsyncToSyncStream(
      uint64_t aStreamSize, already_AddRefed<nsIInputStream> aAsyncStream,
      nsIInputStream** aSyncStream);

  nsresult SyncRead(nsIInputStream* aStream, char* aBuffer,
                    uint32_t aBufferSize, uint32_t* aTotalBytesRead);

 public:
  static already_AddRefed<FileReaderSync> Constructor(
      const GlobalObject& aGlobal);

  bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
                  JS::MutableHandle<JSObject*> aReflector);

  void ReadAsArrayBuffer(JSContext* aCx, JS::Handle<JSObject*> aScopeObj,
                         Blob& aBlob, JS::MutableHandle<JSObject*> aRetval,
                         ErrorResult& aRv);
  void ReadAsBinaryString(Blob& aBlob, nsAString& aResult, ErrorResult& aRv);
  void ReadAsText(Blob& aBlob, const Optional<nsAString>& aEncoding,
                  nsAString& aResult, ErrorResult& aRv);
  void ReadAsDataURL(Blob& aBlob, nsAString& aResult, ErrorResult& aRv);
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_filereadersync_h__