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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_SCREENLOCK_BRIDGE_H_
#define CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_SCREENLOCK_BRIDGE_H_
#include <memory>
#include <string>
#include "base/lazy_instance.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "base/values.h"
#include "chromeos/ash/components/proximity_auth/public/mojom/auth_type.mojom.h"
#include "components/account_id/account_id.h"
namespace ash {
enum class SmartLockState;
} // namespace ash
namespace proximity_auth {
// TODO(jhawkins): Rationalize this class now that it is CrOS only and most of
// its functionality is not useful.
class ScreenlockBridge {
public:
class LockHandler {
public:
enum ScreenType { LOCK_SCREEN = 0, OTHER_SCREEN = 1 };
// Displays |message| in a banner on the lock screen.
virtual void ShowBannerMessage(const std::u16string& message,
bool is_warning) = 0;
// Update the status of Smart Lock for |account_id|.
virtual void SetSmartLockState(const AccountId& account_id,
ash::SmartLockState state) = 0;
// Called after a Smart Lock authentication attempt has been made. If
// |successful| is true, then the Smart Lock authentication attempt was
// successful and the device should be unlocked. If false, an error message
// should be shown to the user.
virtual void NotifySmartLockAuthResult(const AccountId& account_id,
bool successful) = 0;
// (Re)enable lock screen UI.
virtual void EnableInput() = 0;
// Set the authentication type to be used on the lock screen.
virtual void SetAuthType(const AccountId& account_id,
proximity_auth::mojom::AuthType auth_type,
const std::u16string& auth_value) = 0;
// Returns the authentication type used for a user.
virtual proximity_auth::mojom::AuthType GetAuthType(
const AccountId& account_id) const = 0;
// Returns the type of the screen -- a signin or a lock screen.
virtual ScreenType GetScreenType() const = 0;
// Unlocks from easy unlock app for a user.
virtual void Unlock(const AccountId& account_id) = 0;
protected:
virtual ~LockHandler() {}
};
class Observer {
public:
// Invoked after the screen is locked.
virtual void OnScreenDidLock() = 0;
// Invoked after the screen lock is dismissed.
virtual void OnScreenDidUnlock() = 0;
// Invoked when the user focused on the lock screen changes.
virtual void OnFocusedUserChanged(const AccountId& account_id) {}
protected:
virtual ~Observer() {}
};
static ScreenlockBridge* Get();
ScreenlockBridge(const ScreenlockBridge&) = delete;
ScreenlockBridge& operator=(const ScreenlockBridge&) = delete;
void SetLockHandler(LockHandler* lock_handler);
void SetFocusedUser(const AccountId& account_id);
bool IsLocked() const;
void Lock();
// Unlocks the screen for the authenticated user with the given |user_id|.
void Unlock(const AccountId& account_id);
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
LockHandler* lock_handler() { return lock_handler_; }
const AccountId& focused_account_id() const { return focused_account_id_; }
private:
friend struct base::LazyInstanceTraitsBase<ScreenlockBridge>;
friend std::default_delete<ScreenlockBridge>;
ScreenlockBridge();
~ScreenlockBridge();
raw_ptr<LockHandler> lock_handler_ = nullptr; // Not owned
// The last focused user's id.
AccountId focused_account_id_;
base::ObserverList<Observer, true>::Unchecked observers_;
};
} // namespace proximity_auth
#endif // CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_SCREENLOCK_BRIDGE_H_
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