dom/file/FileReaderSync.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_filereadersync_h__
   8 #define mozilla_dom_filereadersync_h__
   9
  10 #include "mozilla/dom/WorkerCommon.h"
  11 #include "nsISupports.h"
  12
  13 class nsIInputStream;
  14
  15 namespace mozilla {
  16 class ErrorResult;
  17
  18 namespace dom {
  19 class Blob;
  20 class GlobalObject;
  21 template <typename>
  22 class Optional;
  23
  24 class FileReaderSync final {
  25   NS_INLINE_DECL_REFCOUNTING(FileReaderSync)
  26
  27  private:
  28   // Private destructor, to discourage deletion outside of Release():
  29   ~FileReaderSync() = default;
  30
  31   nsresult ConvertStream(nsIInputStream* aStream, const char* aCharset,
  32                          nsAString& aResult);
  33
  34   nsresult ConvertAsyncToSyncStream(
  35       uint64_t aStreamSize, already_AddRefed<nsIInputStream> aAsyncStream,
  36       nsIInputStream** aSyncStream);
  37
  38   nsresult SyncRead(nsIInputStream* aStream, char* aBuffer,
  39                     uint32_t aBufferSize, uint32_t* aTotalBytesRead);
  40
  41  public:
  42   static already_AddRefed<FileReaderSync> Constructor(
  43       const GlobalObject& aGlobal);
  44
  45   bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
  46                   JS::MutableHandle<JSObject*> aReflector);
  47
  48   void ReadAsArrayBuffer(JSContext* aCx, JS::Handle<JSObject*> aScopeObj,
  49                          Blob& aBlob, JS::MutableHandle<JSObject*> aRetval,
  50                          ErrorResult& aRv);
  51   void ReadAsBinaryString(Blob& aBlob, nsAString& aResult, ErrorResult& aRv);
  52   void ReadAsText(Blob& aBlob, const Optional<nsAString>& aEncoding,
  53                   nsAString& aResult, ErrorResult& aRv);
  54   void ReadAsDataURL(Blob& aBlob, nsAString& aResult, ErrorResult& aRv);
  55 };
  56
  57 }  // namespace dom
  58 }  // namespace mozilla
  59
  60 #endif  // mozilla_dom_filereadersync_h__