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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_DISPLAY_MANAGER_DISPLAY_CHANGE_OBSERVER_H_
#define UI_DISPLAY_MANAGER_DISPLAY_CHANGE_OBSERVER_H_
#include <stdint.h>
#include <optional>
#include "base/memory/raw_ptr.h"
#include "ui/display/manager/display_configurator.h"
#include "ui/display/manager/display_manager_export.h"
#include "ui/display/manager/managed_display_info.h"
#include "ui/display/types/display_constants.h"
#include "ui/events/devices/input_device_event_observer.h"
namespace gfx {
class RoundedCornersF;
}
namespace display {
class DisplayManager;
class DisplaySnapshot;
// An object that observes changes in display configuration and updates
// DisplayManager.
class DISPLAY_MANAGER_EXPORT DisplayChangeObserver
: public DisplayConfigurator::StateController,
public DisplayConfigurator::Observer,
public ui::InputDeviceEventObserver {
public:
// Returns the mode list for internal display.
DISPLAY_EXPORT static ManagedDisplayInfo::ManagedDisplayModeList
GetInternalManagedDisplayModeList(const ManagedDisplayInfo& display_info,
const DisplaySnapshot& output);
// Returns the resolution list.
DISPLAY_EXPORT static ManagedDisplayInfo::ManagedDisplayModeList
GetExternalManagedDisplayModeList(const DisplaySnapshot& output);
explicit DisplayChangeObserver(DisplayManager* display_manager);
DisplayChangeObserver(const DisplayChangeObserver&) = delete;
DisplayChangeObserver& operator=(const DisplayChangeObserver&) = delete;
~DisplayChangeObserver() override;
// DisplayConfigurator::StateController overrides:
MultipleDisplayState GetStateForDisplayIds(
const DisplayConfigurator::DisplayStateList& outputs) override;
bool GetSelectedModeForDisplayId(int64_t display_id,
ManagedDisplayMode* out_mode) const override;
// Overridden from DisplayConfigurator::Observer:
void OnDisplayConfigurationChanged(
const DisplayConfigurator::DisplayStateList& outputs) override;
void OnDisplayConfigurationChangeFailed(
const DisplayConfigurator::DisplayStateList& displays,
MultipleDisplayState failed_new_state) override;
// Overridden from ui::InputDeviceEventObserver:
void OnInputDeviceConfigurationChanged(uint8_t input_device_types) override;
// Static methods exposed for testing.
DISPLAY_EXPORT static float FindDeviceScaleFactor(
float dpi,
const gfx::Size& size_in_pixels);
static ManagedDisplayInfo CreateManagedDisplayInfo(
const DisplaySnapshot* snapshot,
const DisplayMode* mode_info,
bool native,
float device_scale_factor,
float dpi,
const std::string& name,
const gfx::RoundedCornersF& panel_radii = gfx::RoundedCornersF());
private:
friend class DisplayChangeObserverTestBase;
void UpdateInternalDisplay(
const DisplayConfigurator::DisplayStateList& display_states);
ManagedDisplayInfo CreateManagedDisplayInfoInternal(
const DisplaySnapshot* snapshot,
const DisplayMode* mode_info);
// The panel radii of the internal display that is specified via command-line
// switch `display::switches::kDisplayProperties`.
std::optional<gfx::RoundedCornersF> internal_panel_radii_;
// |display_manager_| is not owned and must outlive DisplayChangeObserver.
raw_ptr<DisplayManager> display_manager_;
};
} // namespace display
#endif // UI_DISPLAY_MANAGER_DISPLAY_CHANGE_OBSERVER_H_
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