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1 // Copyright 2015 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_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_ | |
6 #define CHROME_INSTALLER_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "base/strings/string16.h" | |
10 #include "chrome/installer/util/set_reg_value_work_item.h" | |
11 #include "chrome/installer/util/work_item.h" | |
12 | |
13 // A WorkItem that updates (or installs if not present) the Active Setup | |
14 // "Version" field in the registry. Optionally bumping the OS_UPGRADES component | |
15 // on demand. This WorkItem is only viable on machine-wide installs. | |
16 // TODO(gab): This would be cleaner if UpdateActiveSetupVersionWorkItem | |
grt (UTC plus 2)
2015/07/13 16:47:04
nit: stale comment
gab
2015/07/13 16:58:01
Oops, done.
| |
17 // embedded a SetRegValueWorkItem instead of being one, but this is not possible | |
18 // in today's "private constructor + creator friends" WorkItem model :-(. | |
19 class UpdateActiveSetupVersionWorkItem : public WorkItem { | |
20 public: | |
21 // The operation to be performed by this UpdateActiveSetupVersionWorkItem. | |
22 enum Operation { | |
23 // Update (or install if not present) the Active Setup "Version" in the | |
24 // registry. | |
25 UPDATE, | |
26 // Also bump the OS_UPGRADES component on top of updating the version | |
27 // (will default to 1 if the version was absent or invalid). | |
28 UPDATE_AND_BUMP_OS_UPGRADES_COMPONENT, | |
29 }; | |
30 | |
31 // Constructs an UpdateActiveSetupVersionWorkItem that will perform | |
32 // |operation| on the |active_setup_path| key in the registry. This key needs | |
33 // to exist when this WorkItem is ran. | |
34 UpdateActiveSetupVersionWorkItem(const base::string16& active_setup_path, | |
35 Operation operation); | |
36 | |
37 // Overriden from WorkItem. | |
38 bool Do() override; | |
39 void Rollback() override; | |
40 | |
41 private: | |
42 // The components of the Active Setup Version entry, in order. | |
43 enum ActiveSetupVersionComponent { | |
44 // The major version. | |
45 MAJOR, | |
46 // Unused component, always 0 for now. | |
47 UNUSED1, | |
48 // Number of OS upgrades handled since original install. | |
49 OS_UPGRADES, | |
50 // Unused component, always 0 for now. | |
51 UNUSED2, | |
52 }; | |
53 | |
54 // Returns the updated Active Setup version to be used based on the | |
55 // |existing_version|. | |
56 base::string16 GetUpdatedActiveSetupVersion( | |
57 const base::string16& existing_version); | |
58 | |
59 // The underlying WorkItem re-used to operate forward and backward on the | |
60 // registry. | |
61 SetRegValueWorkItem set_reg_value_work_item_; | |
62 | |
63 // The Operation to be performed by this WorkItem when executed. | |
64 const Operation operation_; | |
65 | |
66 DISALLOW_COPY_AND_ASSIGN(UpdateActiveSetupVersionWorkItem); | |
67 }; | |
68 | |
69 #endif // CHROME_INSTALLER_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_ | |
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