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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_COMMAND_UPDATER_H_ | 5 #ifndef CHROME_BROWSER_COMMAND_UPDATER_H_ |
6 #define CHROME_BROWSER_COMMAND_UPDATER_H_ | 6 #define CHROME_BROWSER_COMMAND_UPDATER_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/hash_tables.h" | 9 #include "base/hash_tables.h" |
10 #include "webkit/glue/window_open_disposition.h" | 10 #include "webkit/glue/window_open_disposition.h" |
11 | 11 |
12 class CommandObserver; | 12 class CommandObserver; |
13 class CommandUpdaterDelegate; | |
13 | 14 |
14 //////////////////////////////////////////////////////////////////////////////// | 15 //////////////////////////////////////////////////////////////////////////////// |
15 // | 16 // |
16 // CommandUpdater class | 17 // CommandUpdater class |
17 // | 18 // |
18 // This object manages the enabled state of a set of commands. Observers | 19 // This object manages the enabled state of a set of commands. Observers |
19 // register to listen to changes in this state so they can update their | 20 // register to listen to changes in this state so they can update their |
20 // presentation. | 21 // presentation. |
21 // | 22 // |
22 class CommandUpdater { | 23 class CommandUpdater { |
23 public: | 24 public: |
24 // A Delegate object implements this interface so that it can execute commands | 25 // Create a CommandUpdater with |delegate| to handle the execution of specific |
25 // when needed. | 26 // commands. |
26 class CommandUpdaterDelegate { | 27 explicit CommandUpdater(CommandUpdaterDelegate* delegate); |
27 public: | 28 ~CommandUpdater(); |
sky
2012/12/06 01:38:08
In general if there are subclasses we make the des
tfarina
2012/12/06 01:41:40
If I understand you, and you are concerned about t
| |
28 // Performs the action associated with the command with the specified ID and | |
29 // using the given disposition. | |
30 virtual void ExecuteCommandWithDisposition( | |
31 int id, | |
32 WindowOpenDisposition disposition) = 0; | |
33 | |
34 protected: | |
35 virtual ~CommandUpdaterDelegate(); | |
36 }; | |
37 | |
38 // Create a CommandUpdater with a CommandUpdaterDelegate to handle execution | |
39 // of specific commands. | |
40 explicit CommandUpdater(CommandUpdaterDelegate* handler); | |
41 virtual ~CommandUpdater(); | |
42 | 29 |
43 // Returns true if the specified command ID is supported. | 30 // Returns true if the specified command ID is supported. |
44 bool SupportsCommand(int id) const; | 31 bool SupportsCommand(int id) const; |
45 | 32 |
46 // Returns true if the specified command ID is enabled. The command ID must be | 33 // Returns true if the specified command ID is enabled. The command ID must be |
47 // supported by this updater. | 34 // supported by this updater. |
48 bool IsCommandEnabled(int id) const; | 35 bool IsCommandEnabled(int id) const; |
49 | 36 |
50 // Performs the action associated with this command ID using CURRENT_TAB | 37 // Performs the action associated with this command ID using CURRENT_TAB |
51 // disposition. | 38 // disposition. |
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84 // exist if desired. | 71 // exist if desired. |
85 Command* GetCommand(int id, bool create); | 72 Command* GetCommand(int id, bool create); |
86 | 73 |
87 // The delegate is responsible for executing commands. | 74 // The delegate is responsible for executing commands. |
88 CommandUpdaterDelegate* delegate_; | 75 CommandUpdaterDelegate* delegate_; |
89 | 76 |
90 // This is a map of command IDs to states and observer lists | 77 // This is a map of command IDs to states and observer lists |
91 typedef base::hash_map<int, Command*> CommandMap; | 78 typedef base::hash_map<int, Command*> CommandMap; |
92 CommandMap commands_; | 79 CommandMap commands_; |
93 | 80 |
94 CommandUpdater(); | |
95 DISALLOW_COPY_AND_ASSIGN(CommandUpdater); | 81 DISALLOW_COPY_AND_ASSIGN(CommandUpdater); |
96 }; | 82 }; |
97 | 83 |
98 #endif // CHROME_BROWSER_COMMAND_UPDATER_H_ | 84 #endif // CHROME_BROWSER_COMMAND_UPDATER_H_ |
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