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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_STYLE_DARK_LIGHT_MODE_CONTROLLER_IMPL_H_
#define ASH_STYLE_DARK_LIGHT_MODE_CONTROLLER_IMPL_H_
#include "ash/ash_export.h"
#include "ash/login/ui/login_data_dispatcher.h"
#include "ash/public/cpp/login_types.h"
#include "ash/public/cpp/style/dark_light_mode_controller.h"
#include "ash/public/cpp/wallpaper/wallpaper_controller_observer.h"
#include "ash/system/scheduled_feature/scheduled_feature.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
class AccountId;
class PrefChangeRegistrar;
class PrefRegistrySimple;
class PrefService;
namespace ash {
class ColorModeObserver;
// Controls the behavior of dark/light mode. Turns on the dark mode at sunset
// and off at sunrise if auto schedule is set (custom start and end for
// scheduling is not supported).
class ASH_EXPORT DarkLightModeControllerImpl
: public DarkLightModeController,
public LoginDataDispatcher::Observer,
public ScheduledFeature {
public:
DarkLightModeControllerImpl();
DarkLightModeControllerImpl(const DarkLightModeControllerImpl&) = delete;
DarkLightModeControllerImpl& operator=(const DarkLightModeControllerImpl&) =
delete;
~DarkLightModeControllerImpl() override;
static DarkLightModeControllerImpl* Get();
static void RegisterProfilePrefs(PrefRegistrySimple* registry);
// Enables or disables auto scheduling on dark mode feature. When enabled,
// the dark mode will automatically turn on during sunset to sunrise and off
// outside that period.
void SetAutoScheduleEnabled(bool enabled);
// True if dark mode is automatically scheduled to turn on at sunset and off
// at sunrise.
bool GetAutoScheduleEnabled() const;
// Toggles pref |kDarkModeEnabled|.
void ToggleColorMode();
// DarkLightModeController:
void AddObserver(ColorModeObserver* observer) override;
void RemoveObserver(ColorModeObserver* observer) override;
bool IsDarkModeEnabled() const override;
void SetDarkModeEnabledForTest(bool enabled) override;
// LoginDataDispatcher::Observer:
void OnOobeDialogStateChanged(OobeDialogState state) override;
void OnFocusPod(const AccountId& account_id) override;
// ScheduledFeature:
void OnActiveUserPrefServiceChanged(PrefService* prefs) override;
void OnSessionStateChanged(session_manager::SessionState state) override;
private:
// ScheduledFeature:
const char* GetFeatureName() const override;
// Notifies all the observers on color mode changes and refreshes the system's
// colors on this change.
void NotifyColorModeChanges();
// Returns a closure which calls `NotifyIfDarkModeChanged` if the dark mode
// changed between creation and getting out of scope.
base::ScopedClosureRunner GetNotifyOnDarkModeChangeClosure();
void NotifyIfDarkModeChanged(bool old_is_dark_mode_enabled);
// Temporary field for testing purposes while OOBE WebUI is being migrated.
std::optional<bool> is_dark_mode_enabled_in_oobe_for_testing_;
OobeDialogState oobe_state_ = OobeDialogState::HIDDEN;
// Keep track of the last value that was sent to avoid multiple notifications.
std::optional<bool> last_value_;
// std::nullopt in case no user pod is focused.
std::optional<bool> is_dark_mode_enabled_for_focused_pod_;
base::ObserverList<ColorModeObserver> observers_;
std::unique_ptr<PrefChangeRegistrar> pref_change_registrar_;
raw_ptr<PrefService> active_user_pref_service_ = nullptr; // Not owned.
};
} // namespace ash
#endif // ASH_STYLE_DARK_LIGHT_MODE_CONTROLLER_IMPL_H_
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