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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_PREFS_PREF_WATCHER_H_
#define CHROME_BROWSER_UI_PREFS_PREF_WATCHER_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/singleton.h"
#include "base/scoped_observation.h"
#include "chrome/browser/profiles/profile_keyed_service_factory.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/privacy_sandbox/tracking_protection_settings.h"
#include "components/privacy_sandbox/tracking_protection_settings_observer.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#include "third_party/blink/public/mojom/renderer_preference_watcher.mojom.h"
#include "ui/native_theme/native_theme_observer.h"
class Profile;
class PrefsTabHelper;
// Watches updates in WebKitPreferences and blink::RendererPreferences, and
// notifies tab helpers and registered watchers of those updates.
class PrefWatcher : public KeyedService,
public privacy_sandbox::TrackingProtectionSettingsObserver,
public ui::NativeThemeObserver {
public:
explicit PrefWatcher(Profile* profile);
~PrefWatcher() override;
static PrefWatcher* Get(Profile* profile);
void RegisterHelper(PrefsTabHelper* helper);
void UnregisterHelper(PrefsTabHelper* helper);
void RegisterRendererPreferenceWatcher(
mojo::PendingRemote<blink::mojom::RendererPreferenceWatcher> watcher);
private:
// KeyedService overrides:
void Shutdown() override;
// ui::NativeThemeObserver:
void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override;
void OnDoNotTrackEnabledChanged() override;
void UpdateRendererPreferences();
void OnWebPrefChanged(const std::string& pref_name);
void OnLiveCaptionEnabledPrefChanged(const std::string& pref_name);
raw_ptr<Profile> profile_;
PrefChangeRegistrar profile_pref_change_registrar_;
PrefChangeRegistrar local_state_pref_change_registrar_;
raw_ptr<privacy_sandbox::TrackingProtectionSettings>
tracking_protection_settings_;
base::ScopedObservation<privacy_sandbox::TrackingProtectionSettings,
privacy_sandbox::TrackingProtectionSettingsObserver>
tracking_protection_settings_observation_{this};
// |tab_helpers_| observe changes in WebKitPreferences and
// blink::RendererPreferences.
std::set<raw_ptr<PrefsTabHelper, SetExperimental>> tab_helpers_;
// |renderer_preference_watchers_| observe changes in
// blink::RendererPreferences. If the consumer also wants to WebKit
// preference changes, use |tab_helpers_|.
mojo::RemoteSet<blink::mojom::RendererPreferenceWatcher>
renderer_preference_watchers_;
base::ScopedObservation<ui::NativeTheme, ui::NativeThemeObserver>
native_theme_observation_{this};
};
class PrefWatcherFactory : public ProfileKeyedServiceFactory {
public:
static PrefWatcher* GetForProfile(Profile* profile);
static PrefWatcherFactory* GetInstance();
private:
friend struct base::DefaultSingletonTraits<PrefWatcherFactory>;
PrefWatcherFactory();
~PrefWatcherFactory() override;
// BrowserContextKeyedServiceFactory:
std::unique_ptr<KeyedService> BuildServiceInstanceForBrowserContext(
content::BrowserContext* browser_context) const override;
};
#endif // CHROME_BROWSER_UI_PREFS_PREF_WATCHER_H_
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