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_TemporaryFileBlobImpl_h
8 #define mozilla_dom_TemporaryFileBlobImpl_h
9 
10 #include "FileBlobImpl.h"
11 
12 namespace mozilla {
13 namespace dom {
14 
15 // This class is meant to be used by TemporaryIPCBlobParent only.
16 // Don't use it for anything else, please!
17 // Note that CreateInputStream() _must_ be called, and called just once!
18 
19 // This class is a BlobImpl because it needs to be sent via IPC using
20 // IPCBlobUtils.
21 class TemporaryFileBlobImpl final : public FileBlobImpl {
22 #ifdef DEBUG
23   bool mInputStreamCreated;
24 #endif
25 
26  public:
27   explicit TemporaryFileBlobImpl(nsIFile* aFile, const nsAString& aContentType);
28 
29   // Overrides
30   void CreateInputStream(nsIInputStream** aInputStream,
31                          ErrorResult& aRv) override;
32 
GetBlobImplType(nsAString & aBlobImplType)33   void GetBlobImplType(nsAString& aBlobImplType) const override {
34     aBlobImplType = NS_LITERAL_STRING("TemporaryFileBlobImpl");
35   }
36 
37  protected:
38   ~TemporaryFileBlobImpl();
39 
40  private:
41   already_AddRefed<BlobImpl> CreateSlice(uint64_t aStart, uint64_t aLength,
42                                          const nsAString& aContentType,
43                                          ErrorResult& aRv) override;
44 };
45 
46 }  // namespace dom
47 }  // namespace mozilla
48 
49 #endif  // mozilla_dom_TemporaryFileBlobImpl_h
50