Index: components/keyboard_lock/key_hook_state_keeper.h |
diff --git a/components/keyboard_lock/key_hook_state_keeper.h b/components/keyboard_lock/key_hook_state_keeper.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..bf66a927787da37512bdc48655e4c9393d9f2fd6 |
--- /dev/null |
+++ b/components/keyboard_lock/key_hook_state_keeper.h |
@@ -0,0 +1,47 @@ |
+// Copyright 2017 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. |
+ |
+#ifndef COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_STATE_KEEPER_H_ |
+#define COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_STATE_KEEPER_H_ |
+ |
+#include <memory> |
+#include <vector> |
+ |
+#include "components/keyboard_lock/key_event_filter.h" |
+#include "components/keyboard_lock/key_hook_activator.h" |
+ |
+namespace keyboard_lock { |
+ |
+// An implementation of both KeyHookActivator and KeyEventFilter by maintaining |
+// the internal states and filtering out unregistered key codes. |
+class KeyHookStateKeeper final |
+ : public KeyEventFilter, |
+ public KeyHookActivator { |
+ public: |
+ KeyHookStateKeeper(std::unique_ptr<KeyEventFilter> filter, |
+ std::unique_ptr<KeyHook> key_hook); |
+ ~KeyHookStateKeeper() override; |
+ |
+ // KeyEventFilter implementations. |
+ bool OnKeyDown(ui::KeyboardCode code, int flags) override; |
+ bool OnKeyUp(ui::KeyboardCode code, int flags) override; |
+ |
+ // KeyHookActivator implementations. |
+ void RegisterKey(const std::vector<ui::KeyboardCode>& codes, |
+ base::Callback<void(bool)> on_result) override; |
+ void UnregisterKey(const std::vector<ui::KeyboardCode>& codes, |
+ base::Callback<void(bool)> on_result) override; |
+ void Activate(base::Callback<void(bool)> on_result) override; |
+ void Deactivate(base::Callback<void(bool)> on_result) override; |
+ |
+ private: |
+ const std::unique_ptr<KeyEventFilter> filter_; |
+ const std::unique_ptr<KeyHook> key_hook_; |
+ std::vector<bool> states_; |
+ bool active_; |
+}; |
+ |
+} // namespace keyboard_lock |
+ |
+#endif // COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_STATE_KEEPER_H_ |