Index: components/keyboard_lock/key_hook.h |
diff --git a/components/keyboard_lock/key_hook.h b/components/keyboard_lock/key_hook.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..3071249fa4038ace254c3a715cd5e8231128fcfe |
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+++ b/components/keyboard_lock/key_hook.h |
@@ -0,0 +1,35 @@ |
+// 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_H_ |
+#define COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_H_ |
+ |
+#include <vector> |
+ |
+#include "base/callback.h" |
+#include "ui/events/keycodes/keyboard_codes.h" |
+ |
+namespace keyboard_lock { |
+ |
+// An interface to register and unregister key codes from low level callback. |
+// The implementation needs to guarantee the thread-safety of RegisterKey() and |
+// UnregisterKey() functions, which may be executed in both UI thread and |
+// network thread. |
+class KeyHook { |
+ public: |
+ KeyHook() = default; |
+ virtual ~KeyHook() = default; |
+ |
+ // The |on_result| callback will be called with the result if it's not null. |
+ // Calling |on_result| with |false| indicates the failure of an OK API |
+ // invoking. Thus, the required ui::KeyboardCode may not be able to received. |
+ virtual void RegisterKey(const std::vector<ui::KeyboardCode>& codes, |
+ base::Callback<void(bool)> on_result) = 0; |
+ virtual void UnregisterKey(const std::vector<ui::KeyboardCode>& codes, |
+ base::Callback<void(bool)> on_result) = 0; |
+}; |
+ |
+} // namespace keyboard_lock |
+ |
+#endif // COMPONENTS_KEYBOARD_LOCK_KEY_HOOK_H_ |