dom/filesystem/OSFileSystem.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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_OSFileSystem_h
   8 #define mozilla_dom_OSFileSystem_h
   9
  10 #include "mozilla/dom/FileSystemBase.h"
  11
  12 namespace mozilla {
  13 namespace dom {
  14
  15 class OSFileSystem final : public FileSystemBase {
  16  public:
  17   explicit OSFileSystem(const nsAString& aRootDir);
  18
  19   void Init(nsISupports* aParent);
  20
  21   // Overrides FileSystemBase
  22
  23   virtual already_AddRefed<FileSystemBase> Clone() override;
  24
  25   virtual bool ShouldCreateDirectory() override {
  26     MOZ_CRASH("This should not be called.");
  27     // Because OSFileSystem should not be used when the creation of directories
  28     // is needed. For that we have OSFileSystemParent.
  29     return false;
  30   }
  31
  32   virtual nsISupports* GetParentObject() const override;
  33
  34   virtual bool IsSafeFile(nsIFile* aFile) const override;
  35
  36   virtual bool IsSafeDirectory(Directory* aDir) const override;
  37
  38   virtual void SerializeDOMPath(nsAString& aOutput) const override;
  39
  40   // CC methods
  41   virtual void Unlink() override;
  42   virtual void Traverse(nsCycleCollectionTraversalCallback& cb) override;
  43
  44  private:
  45   virtual ~OSFileSystem() {}
  46
  47   nsCOMPtr<nsISupports> mParent;
  48 };
  49
  50 class OSFileSystemParent final : public FileSystemBase {
  51  public:
  52   explicit OSFileSystemParent(const nsAString& aRootDir);
  53
  54   // Overrides FileSystemBase
  55
  56   virtual already_AddRefed<FileSystemBase> Clone() override {
  57     MOZ_CRASH("This should not be called on the PBackground thread.");
  58     return nullptr;
  59   }
  60
  61   virtual bool ShouldCreateDirectory() override { return false; }
  62
  63   virtual nsISupports* GetParentObject() const override {
  64     MOZ_CRASH("This should not be called on the PBackground thread.");
  65     return nullptr;
  66   }
  67
  68   virtual void GetDirectoryName(nsIFile* aFile, nsAString& aRetval,
  69                                 ErrorResult& aRv) const override {
  70     MOZ_CRASH("This should not be called on the PBackground thread.");
  71   }
  72
  73   virtual bool IsSafeFile(nsIFile* aFile) const override { return true; }
  74
  75   virtual bool IsSafeDirectory(Directory* aDir) const override {
  76     MOZ_CRASH("This should not be called on the PBackground thread.");
  77     return true;
  78   }
  79
  80   virtual void SerializeDOMPath(nsAString& aOutput) const override {
  81     MOZ_CRASH("This should not be called on the PBackground thread.");
  82   }
  83
  84   // CC methods
  85   virtual void Unlink() override {
  86     MOZ_CRASH("This should not be called on the PBackground thread.");
  87   }
  88
  89   virtual void Traverse(nsCycleCollectionTraversalCallback& cb) override {
  90     MOZ_CRASH("This should not be called on the PBackground thread.");
  91   }
  92
  93  private:
  94   virtual ~OSFileSystemParent() {}
  95 };
  96
  97 }  // namespace dom
  98 }  // namespace mozilla
  99
 100 #endif  // mozilla_dom_OSFileSystem_h