| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/extensions/global_shortcut_listener.h" |
| #include "chrome/browser/profiles/profile.h" |
| #include "ui/base/accelerators/accelerator.h" |
| |
| namespace extensions { |
| |
| GlobalShortcutListener::GlobalShortcutListener() { |
| } |
| |
| GlobalShortcutListener::~GlobalShortcutListener() { |
| DCHECK(accelerator_map_.empty()); // Make sure we've cleaned up. |
| } |
| |
| void GlobalShortcutListener::RegisterAccelerator( |
| const ui::Accelerator& accelerator, Observer* observer) { |
| AcceleratorMap::const_iterator it = accelerator_map_.find(accelerator); |
| if (it == accelerator_map_.end()) { |
| if (accelerator_map_.empty()) |
| GlobalShortcutListener::GetInstance()->StartListening(); |
| Observers* observers = new Observers; |
| observers->AddObserver(observer); |
| accelerator_map_[accelerator] = observers; |
| } else { |
| // Make sure we don't register the same accelerator twice. |
| DCHECK(!accelerator_map_[accelerator]->HasObserver(observer)); |
| accelerator_map_[accelerator]->AddObserver(observer); |
| } |
| } |
| |
| void GlobalShortcutListener::UnregisterAccelerator( |
| const ui::Accelerator& accelerator, Observer* observer) { |
| AcceleratorMap::iterator it = accelerator_map_.find(accelerator); |
| DCHECK(it != accelerator_map_.end()); |
| DCHECK(it->second->HasObserver(observer)); |
| it->second->RemoveObserver(observer); |
| if (!it->second->might_have_observers()) { |
| accelerator_map_.erase(it); |
| if (accelerator_map_.empty()) |
| GlobalShortcutListener::GetInstance()->StopListening(); |
| } |
| } |
| |
| void GlobalShortcutListener::NotifyKeyPressed( |
| const ui::Accelerator& accelerator) { |
| AcceleratorMap::iterator iter = accelerator_map_.find(accelerator); |
| if (iter == accelerator_map_.end()) { |
| // This should never occur, because if it does, we have failed to unregister |
| // or failed to clean up the map after unregistering the shortcut. |
| NOTREACHED(); |
| return; // No-one is listening to this key. |
| } |
| // The observer list should not be empty. |
| DCHECK(iter->second->might_have_observers()); |
| |
| FOR_EACH_OBSERVER(Observer, *(iter->second), OnKeyPressed(accelerator)); |
| } |
| |
| } // namespace extensions |