| // Copyright 2019 The Fuchsia 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 SRC_UI_BIN_ROOT_PRESENTER_MEDIA_BUTTONS_HANDLER_H_ |
| #define SRC_UI_BIN_ROOT_PRESENTER_MEDIA_BUTTONS_HANDLER_H_ |
| |
| #include <fuchsia/ui/policy/cpp/fidl.h> |
| |
| #include "src/lib/ui/input/device_state.h" |
| #include "src/lib/ui/input/input_device_impl.h" |
| |
| namespace root_presenter { |
| |
| // MediaButtonsHandler tracks input devices with media buttons and notifies |
| // listeners of media button events originating from said devices. Listeners |
| // also receive an initial button state of the devices present at the time of |
| // registration. |
| class MediaButtonsHandler { |
| public: |
| void RegisterListener(fidl::InterfaceHandle<fuchsia::ui::policy::MediaButtonsListener> listener); |
| bool OnDeviceAdded(ui_input::InputDeviceImpl* input_device); |
| bool OnDeviceRemoved(uint32_t device_id); |
| bool OnReport(uint32_t device_id, fuchsia::ui::input::InputReport report); |
| |
| private: |
| // OnEvent is the callback invoked by the closure registered as the callback |
| // for when an input device's state changes. This method then forwards the |
| // event (translated into media button state) to each listener. |
| void OnEvent(fuchsia::ui::input::InputReport event); |
| |
| // A registry of listeners for media button events. |
| std::vector<fuchsia::ui::policy::MediaButtonsListenerPtr> media_buttons_listeners_; |
| |
| std::map<uint32_t, std::pair<ui_input::InputDeviceImpl*, std::unique_ptr<ui_input::DeviceState>>> |
| device_states_by_id_; |
| }; |
| |
| } // namespace root_presenter |
| |
| #endif // SRC_UI_BIN_ROOT_PRESENTER_MEDIA_BUTTONS_HANDLER_H_ |