dom/indexedDB/FileSnapshot.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_indexeddb_filesnapshot_h__
   8 #define mozilla_dom_indexeddb_filesnapshot_h__
   9
  10 #include "mozilla/Attributes.h"
  11 #include "nsAutoPtr.h"
  12 #include "nsCOMPtr.h"
  13 #include "nsCycleCollectionParticipant.h"
  14 #include "nsDOMFile.h"
  15
  16 namespace mozilla {
  17 namespace dom {
  18 namespace indexedDB {
  19
  20 class IDBFileHandle;
  21
  22 class FileImplSnapshot : public DOMFileImplBase
  23 {
  24 public:
  25   NS_DECL_ISUPPORTS_INHERITED
  26
  27   // Create as a stored file
  28   FileImplSnapshot(const nsAString& aName, const nsAString& aContentType,
  29                    uint64_t aLength, nsIFile* aFile, IDBFileHandle* aFileHandle,
  30                    FileInfo* aFileInfo);
  31
  32   // Overrides
  33   virtual nsresult
  34   GetMozFullPathInternal(nsAString& aFullPath) MOZ_OVERRIDE;
  35
  36   virtual nsresult
  37   GetInternalStream(nsIInputStream** aStream) MOZ_OVERRIDE;
  38
  39   virtual void
  40   Unlink() MOZ_OVERRIDE;
  41
  42   virtual void
  43   Traverse(nsCycleCollectionTraversalCallback &aCb) MOZ_OVERRIDE;
  44
  45   virtual bool
  46   IsCCed() const MOZ_OVERRIDE
  47   {
  48     return true;
  49   }
  50
  51 protected:
  52   // Create slice
  53   FileImplSnapshot(const FileImplSnapshot* aOther, uint64_t aStart,
  54                    uint64_t aLength, const nsAString& aContentType);
  55
  56   virtual ~FileImplSnapshot();
  57
  58   virtual already_AddRefed<nsIDOMBlob>
  59   CreateSlice(uint64_t aStart, uint64_t aLength,
  60               const nsAString& aContentType) MOZ_OVERRIDE;
  61
  62   virtual bool
  63   IsStoredFile() const MOZ_OVERRIDE
  64   {
  65     return true;
  66   }
  67
  68   virtual bool
  69   IsWholeFile() const MOZ_OVERRIDE
  70   {
  71     return mWholeFile;
  72   }
  73
  74   virtual bool
  75   IsSnapshot() const MOZ_OVERRIDE
  76   {
  77     return true;
  78   }
  79
  80 private:
  81   nsCOMPtr<nsIFile> mFile;
  82   nsRefPtr<IDBFileHandle> mFileHandle;
  83
  84   bool mWholeFile;
  85 };
  86
  87 } // namespace indexedDB
  88 } // namespace dom
  89 } // namespace mozilla
  90
  91 #endif // mozilla_dom_indexeddb_filesnapshot_h__