blob: adf4b9c9b2bc2df3afb20394741a1fe34455bfe9 [file] [log] [blame]
// Copyright 2018 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 UI_BASE_ACCELERATORS_GLOBAL_MEDIA_KEYS_LISTENER_WIN_H_
#define UI_BASE_ACCELERATORS_GLOBAL_MEDIA_KEYS_LISTENER_WIN_H_
#include "base/component_export.h"
#include "base/containers/flat_map.h"
#include "base/win/windows_types.h"
#include "ui/base/accelerators/media_keys_listener.h"
#include "ui/events/keycodes/keyboard_codes.h"
namespace gfx {
class SingletonHwndHotKeyObserver;
} // namespace gfx
namespace ui {
// Implementation of MediaKeysListener that uses RegisterHotKey to globally
// listen for media key presses. It only allows for a single instance to be
// created in order to prevent conflicts form multiple listeners.
class COMPONENT_EXPORT(UI_BASE) GlobalMediaKeysListenerWin
: public MediaKeysListener {
public:
explicit GlobalMediaKeysListenerWin(MediaKeysListener::Delegate* delegate);
~GlobalMediaKeysListenerWin() override;
static bool has_instance() { return has_instance_; }
// MediaKeysListener implementation.
bool StartWatchingMediaKey(KeyboardCode key_code) override;
void StopWatchingMediaKey(KeyboardCode key_code) override;
private:
// Called by SingletonHwndObserver.
void OnWndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
static bool has_instance_;
MediaKeysListener::Delegate* delegate_;
base::flat_map<KeyboardCode,
std::unique_ptr<gfx::SingletonHwndHotKeyObserver>>
key_codes_hotkey_observers_;
DISALLOW_COPY_AND_ASSIGN(GlobalMediaKeysListenerWin);
};
} // namespace ui
#endif // UI_BASE_ACCELERATORS_GLOBAL_MEDIA_KEYS_LISTENER_WIN_H_