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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 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_UI_COCOA_COMMAND_OBSERVER_BRIDGE | 5 #ifndef CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE |
6 #define CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE | 6 #define CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #import <Cocoa/Cocoa.h> | 9 #import <Cocoa/Cocoa.h> |
10 | 10 |
11 #include "base/compiler_specific.h" | 11 #include "base/compiler_specific.h" |
12 #include "chrome/browser/command_updater.h" | 12 #include "chrome/browser/command_observer.h" |
13 | 13 |
14 @protocol CommandObserverProtocol; | 14 @protocol CommandObserverProtocol; |
15 | 15 |
| 16 class CommandUpdater; |
| 17 |
16 // A C++ bridge class that handles listening for updates to commands and | 18 // A C++ bridge class that handles listening for updates to commands and |
17 // passing them back to an object that supports the protocol delcared below. | 19 // passing them back to an object that supports the protocol delcared below. |
18 // The observer will create one of these bridges, call ObserveCommand() on the | 20 // The observer will create one of these bridges, call ObserveCommand() on the |
19 // command ids it cares about, and then wait for update notifications, | 21 // command ids it cares about, and then wait for update notifications, |
20 // delivered via -enabledStateChangedForCommand:enabled:. Destroying this | 22 // delivered via -enabledStateChangedForCommand:enabled:. Destroying this |
21 // bridge will handle automatically unregistering for updates, so there's no | 23 // bridge will handle automatically unregistering for updates, so there's no |
22 // need to do that manually. | 24 // need to do that manually. |
23 | 25 |
24 class CommandObserverBridge : public CommandUpdater::CommandObserver { | 26 class CommandObserverBridge : public CommandObserver { |
25 public: | 27 public: |
26 CommandObserverBridge(id<CommandObserverProtocol> observer, | 28 CommandObserverBridge(id<CommandObserverProtocol> observer, |
27 CommandUpdater* commands); | 29 CommandUpdater* commands); |
28 virtual ~CommandObserverBridge(); | 30 virtual ~CommandObserverBridge(); |
29 | 31 |
30 // Register for updates about |command|. | 32 // Register for updates about |command|. |
31 void ObserveCommand(int command); | 33 void ObserveCommand(int command); |
32 | 34 |
33 protected: | 35 protected: |
34 // Overridden from CommandUpdater::CommandObserver | 36 // Overridden from CommandObserver |
35 virtual void EnabledStateChangedForCommand(int command, | 37 virtual void EnabledStateChangedForCommand(int command, |
36 bool enabled) OVERRIDE; | 38 bool enabled) OVERRIDE; |
37 | 39 |
38 private: | 40 private: |
39 id<CommandObserverProtocol> observer_; // weak, owns me | 41 id<CommandObserverProtocol> observer_; // weak, owns me |
40 CommandUpdater* commands_; // weak | 42 CommandUpdater* commands_; // weak |
41 }; | 43 }; |
42 | 44 |
43 // Implemented by the observing Objective-C object, called when there is a | 45 // Implemented by the observing Objective-C object, called when there is a |
44 // state change for the given command. | 46 // state change for the given command. |
45 @protocol CommandObserverProtocol | 47 @protocol CommandObserverProtocol |
46 - (void)enabledStateChangedForCommand:(NSInteger)command enabled:(BOOL)enabled; | 48 - (void)enabledStateChangedForCommand:(NSInteger)command enabled:(BOOL)enabled; |
47 @end | 49 @end |
48 | 50 |
49 #endif // CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE | 51 #endif // CHROME_BROWSER_UI_COCOA_COMMAND_OBSERVER_BRIDGE |
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