chrome/installer/util/copy_reg_key_work_item.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_
   6 #define CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "chrome/installer/util/registry_key_backup.h"
  13 #include "chrome/installer/util/work_item.h"
  14
  15 // A WorkItem subclass that replaces the contents of one registry key with that
  16 // of another (i.e., the destination is erased prior to the copy).  Be aware
  17 // that in the event of rollback the destination key's values and subkeys are
  18 // restored but the key and its subkeys take on their default security
  19 // descriptors.
  20 class CopyRegKeyWorkItem : public WorkItem {
  21  public:
  22   virtual ~CopyRegKeyWorkItem();
  23   virtual bool Do() OVERRIDE;
  24   virtual void Rollback() OVERRIDE;
  25
  26  private:
  27   // Grant WorkItem access to the ctor (required by the existing WorkItem
  28   // design).
  29   friend class WorkItem;
  30
  31   // Neither |source_key_path| nor |dest_key_path| may be empty.
  32   // Only ALWAYS and IF_NOT_PRESENT are supported for |overwrite_option|.
  33   CopyRegKeyWorkItem(HKEY predefined_key,
  34                      const std::wstring& source_key_path,
  35                      const std::wstring& dest_key_path,
  36                      CopyOverWriteOption overwrite_option);
  37
  38   // Root key in which we operate. The root key must be one of the predefined
  39   // keys on Windows.
  40   HKEY predefined_root_;
  41
  42   // Path of the key to be copied.
  43   std::wstring source_key_path_;
  44
  45   // Path of the destination key.
  46   std::wstring dest_key_path_;
  47
  48   // WorkItem::ALWAYS or WorkItem::IF_NOT_PRESENT.
  49   CopyOverWriteOption overwrite_option_;
  50
  51   // Backup of the destination key.
  52   RegistryKeyBackup backup_;
  53
  54   // Set to true after the destination is cleared for the copy.
  55   bool cleared_destination_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(CopyRegKeyWorkItem);
  58 };
  59
  60 #endif  // CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_