| // 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 COMPONENTS_EXO_WAYLAND_WAYLAND_DISPLAY_OBSERVER_H_ |
| #define COMPONENTS_EXO_WAYLAND_WAYLAND_DISPLAY_OBSERVER_H_ |
| |
| #include <stdint.h> |
| #include <wayland-server-protocol-core.h> |
| |
| #include "base/observer_list.h" |
| #include "ui/display/display.h" |
| #include "ui/display/display_observer.h" |
| |
| struct wl_resource; |
| |
| namespace exo { |
| namespace wayland { |
| |
| class WaylandDisplayObserver : public display::DisplayObserver { |
| public: |
| class ScaleObserver : public base::CheckedObserver { |
| public: |
| ScaleObserver() {} |
| |
| virtual void OnDisplayScalesChanged(const display::Display& display) = 0; |
| |
| protected: |
| ~ScaleObserver() override {} |
| }; |
| |
| WaylandDisplayObserver(int64_t id, wl_resource* output_resource); |
| ~WaylandDisplayObserver() override; |
| void AddScaleObserver(ScaleObserver* scale_observer); |
| bool HasScaleObserver(ScaleObserver* scale_observer) const; |
| |
| // Overridden from display::DisplayObserver: |
| void OnDisplayMetricsChanged(const display::Display& display, |
| uint32_t changed_metrics) override; |
| |
| private: |
| void SendDisplayMetrics(); |
| // Returns the transform that a compositor will apply to a surface to |
| // compensate for the rotation of an output device. |
| wl_output_transform OutputTransform(display::Display::Rotation rotation); |
| |
| // The ID of the display being observed. |
| const int64_t id_; |
| |
| // The output resource associated with the display. |
| wl_resource* const output_resource_; |
| |
| base::ObserverList<ScaleObserver> scale_observers_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WaylandDisplayObserver); |
| }; |
| |
| } // namespace wayland |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_WAYLAND_WAYLAND_DISPLAY_OBSERVER_H_ |