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// Copyright 2017 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_EXTENSIONS_API_SETTINGS_PRIVATE_GENERATED_PREF_H_
#define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_GENERATED_PREF_H_
#include <string>
#include "base/observer_list.h"
#include "chrome/browser/extensions/api/settings_private/prefs_util_enums.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/prefs/pref_service.h"
namespace base {
class Value;
}
namespace extensions {
namespace api {
namespace settings_private {
struct PrefObject;
} // namespace settings_private
} // namespace api
namespace settings_private {
// Base class for generated preference implementation.
// These are the "preferences" that exist in settings_private API only
// to simplify creating Settings UI for something not directly attached to
// user preference.
class GeneratedPref {
public:
class Observer {
public:
Observer();
Observer(const Observer&) = delete;
Observer& operator=(const Observer&) = delete;
virtual ~Observer();
// This method is called to notify observer that visible value
// of the preference has changed.
virtual void OnGeneratedPrefChanged(const std::string& pref_name) = 0;
};
GeneratedPref(const GeneratedPref&) = delete;
GeneratedPref& operator=(const GeneratedPref&) = delete;
virtual ~GeneratedPref();
// Returns fully populated PrefObject.
virtual api::settings_private::PrefObject GetPrefObject() const = 0;
// Updates "preference" value.
virtual SetPrefResult SetPref(const base::Value* value) = 0;
// Modify observer list.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
protected:
GeneratedPref();
// Call this when the pref value changes.
void NotifyObservers(const std::string& pref_name);
// Sets controlled_by for |pref_object| based on provided |pref| for a limited
// subset of controlled_by sources relevant to generated pref use cases.
static void ApplyControlledByFromPref(
api::settings_private::PrefObject* pref_object,
const PrefService::Preference* pref);
// Sets controlled_by for |pref_object| base on provided |setting_source|
// for a limited subset of controlled_by sources relevant for content
// settings.
static void ApplyControlledByFromContentSettingSource(
api::settings_private::PrefObject* pref_object,
content_settings::SettingSource setting_source);
// Adds the provided |value| to the user selectable values of |pref_object|,
// creating the base::Value vector if required.
static void AddUserSelectableValue(
extensions::api::settings_private::PrefObject* pref_object,
int value);
private:
base::ObserverList<Observer>::Unchecked observers_;
};
} // namespace settings_private
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_GENERATED_PREF_H_
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