TemporaryFileBlobImpl.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_TemporaryFileBlobImpl_h
#define mozilla_dom_TemporaryFileBlobImpl_h

#include "FileBlobImpl.h"

namespace mozilla {
namespace dom {

// This class is meant to be used by TemporaryIPCBlobParent only.
// Don't use it for anything else, please!
// Note that CreateInputStream() _must_ be called, and called just once!

// This class is a BlobImpl because it needs to be sent via IPC using
// IPCBlobUtils.
class TemporaryFileBlobImpl final : public FileBlobImpl {
#ifdef DEBUG
  bool mInputStreamCreated;
#endif

 public:
  explicit TemporaryFileBlobImpl(nsIFile* aFile, const nsAString& aContentType);

  // Overrides
  void CreateInputStream(nsIInputStream** aInputStream,
                         ErrorResult& aRv) override;

  void GetBlobImplType(nsAString& aBlobImplType) const override {
    aBlobImplType = u"TemporaryFileBlobImpl"_ns;
  }

 protected:
  ~TemporaryFileBlobImpl();

 private:
  already_AddRefed<BlobImpl> CreateSlice(uint64_t aStart, uint64_t aLength,
                                         const nsAString& aContentType,
                                         ErrorResult& aRv) override;
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_TemporaryFileBlobImpl_h