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| 1 // Copyright (c) 2013 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 #include "chrome/browser/extensions/global_shortcut_listener.h" |
| 6 #include "chrome/browser/profiles/profile.h" |
| 7 #include "ui/base/accelerators/accelerator.h" |
| 8 |
| 9 namespace extensions { |
| 10 |
| 11 GlobalShortcutListener::GlobalShortcutListener() { |
| 12 } |
| 13 |
| 14 GlobalShortcutListener::~GlobalShortcutListener() { |
| 15 DCHECK(accelerator_map_.empty()); // Make sure we've cleaned up. |
| 16 } |
| 17 |
| 18 void GlobalShortcutListener::RegisterAccelerator( |
| 19 const ui::Accelerator& accelerator, Observer* observer) { |
| 20 AcceleratorMap::const_iterator it = accelerator_map_.find(accelerator); |
| 21 if (it == accelerator_map_.end()) { |
| 22 if (accelerator_map_.empty()) |
| 23 GlobalShortcutListener::GetInstance()->StartListening(); |
| 24 Observers* observers = new Observers; |
| 25 observers->AddObserver(observer); |
| 26 accelerator_map_[accelerator] = observers; |
| 27 } else { |
| 28 // Make sure we don't register the same accelerator twice. |
| 29 DCHECK(!accelerator_map_[accelerator]->HasObserver(observer)); |
| 30 accelerator_map_[accelerator]->AddObserver(observer); |
| 31 } |
| 32 } |
| 33 |
| 34 void GlobalShortcutListener::UnregisterAccelerator( |
| 35 const ui::Accelerator& accelerator, Observer* observer) { |
| 36 AcceleratorMap::iterator it = accelerator_map_.find(accelerator); |
| 37 DCHECK(it != accelerator_map_.end()); |
| 38 DCHECK(it->second->HasObserver(observer)); |
| 39 it->second->RemoveObserver(observer); |
| 40 if (!it->second->might_have_observers()) { |
| 41 accelerator_map_.erase(it); |
| 42 if (accelerator_map_.empty()) |
| 43 GlobalShortcutListener::GetInstance()->StopListening(); |
| 44 } |
| 45 } |
| 46 |
| 47 void GlobalShortcutListener::NotifyKeyPressed( |
| 48 const ui::Accelerator& accelerator) { |
| 49 AcceleratorMap::iterator iter = accelerator_map_.find(accelerator); |
| 50 if (iter == accelerator_map_.end()) { |
| 51 // This should never occur, because if it does, we have failed to unregister |
| 52 // or failed to clean up the map after unregistering the shortcut. |
| 53 NOTREACHED(); |
| 54 return; // No-one is listening to this key. |
| 55 } |
| 56 // The observer list should not be empty. |
| 57 DCHECK(iter->second->might_have_observers()); |
| 58 |
| 59 FOR_EACH_OBSERVER(Observer, *(iter->second), OnKeyPressed(accelerator)); |
| 60 } |
| 61 |
| 62 } // namespace extensions |
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