ash/login/ui/login_auth_user_view.h - chromium/src - Git at Google

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #ifndef ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_
 #define ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_

 #include <stdint.h>
 #include <memory>

 #include "ash/ash_export.h"
 #include "ash/login/ui/auth_factor_model.h"
 #include "ash/login/ui/login_error_bubble.h"
 #include "ash/login/ui/login_password_view.h"
 #include "ash/login/ui/login_user_view.h"
 #include "ash/login/ui/non_accessible_view.h"
 #include "ash/public/cpp/login_types.h"
 #include "ash/public/cpp/session/user_info.h"
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "third_party/abseil-cpp/absl/types/optional.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"

 namespace views {
 class LabelButton;
 }

 namespace ash {

 class LoginAuthFactorsView;
 class FingerprintAuthFactorModel;
 class SmartLockAuthFactorModel;
 class LoginPasswordView;
 class LoginPinView;
 class LoginPinInputView;
 enum class SmartLockState;

 // Wraps a UserView which also has authentication available. Adds additional
 // views below the UserView instance which show authentication UIs.
 //
 // This class will make call mojo authentication APIs directly. The embedder can
 // receive some events about the results of those mojo
 // authentication attempts (ie, success/failure).
 class ASH_EXPORT LoginAuthUserView : public NonAccessibleView {
  public:
   // Flags which describe the set of currently visible auth methods.
   enum AuthMethods {
     AUTH_NONE = 0,                     // No extra auth methods.
     AUTH_PASSWORD = 1 << 0,            // Display password.
     AUTH_PIN = 1 << 1,                 // Display PIN keyboard.
     AUTH_TAP = 1 << 2,                 // [DEPRECATED] Tap to unlock.
                                        // TODO(b/217970801): Remove this field.
     AUTH_ONLINE_SIGN_IN = 1 << 3,      // Force online sign-in.
     AUTH_FINGERPRINT = 1 << 4,         // Use fingerprint to unlock.
     AUTH_SMART_LOCK = 1 << 5,          // Use Smart Lock to unlock.
     AUTH_CHALLENGE_RESPONSE = 1 << 6,  // Authenticate via challenge-response
                                        // protocol using security token.
     AUTH_DISABLED = 1 << 7,  // Disable all the auth methods and show a
                              // message to user.
     AUTH_DISABLED_TPM_LOCKED = 1 << 8,  // Disable all the auth methods due
                                         // to the TPM being locked
     AUTH_AUTH_FACTOR_IS_HIDING_PASSWORD =
         1 << 9,  // Hide the password/pin fields and slide the auth factors
                  // up. This happens, for example,  when an auth factor requires
                  // the user to click a button as a final step. Note that if
                  // this bit is set, the password/pin will be hidden even if
                  // AUTH_PASSWORD and/or AUTH_PIN are set.
   };

   // Extra control parameters to be passed when setting the auth methods.
   struct AuthMethodsMetadata {
     AuthMethodsMetadata();
     ~AuthMethodsMetadata();
     AuthMethodsMetadata(const AuthMethodsMetadata&);

     // If the virtual keyboard is visible, the pinpad is hidden.
     bool virtual_keyboard_visible = false;
     // Whether to show the pinpad for the password field.
     bool show_pinpad_for_pw = false;
     // User's pin length to use for autosubmit.
     size_t autosubmit_pin_length = 0;
     // Only present when the TPM is locked.
     absl::optional<base::TimeDelta> time_until_tpm_unlock = absl::nullopt;
   };

   // Possible states that the input fields (PasswordView & PinInputView)
   // might be in. This is determined by the current authentication methods
   // that a user has.
   enum class InputFieldMode {
     NONE,              // Not showing any input field.
     PASSWORD_ONLY,     // No PIN set. Password only field.
     PIN_AND_PASSWORD,  // PIN set, but auto-submit feature disabled.
     PIN_WITH_TOGGLE,   // PIN field for auto submit.
     PWD_WITH_TOGGLE    // PWD field when auto submit enabled.
   };

   // TestApi is used for tests to get internal implementation details.
   class ASH_EXPORT TestApi {
    public:
     explicit TestApi(LoginAuthUserView* view);
     ~TestApi();

     LoginUserView* user_view() const;
     LoginPasswordView* password_view() const;
     LoginPinView* pin_view() const;
     LoginPinInputView* pin_input_view() const;
     views::Button* pin_password_toggle() const;
     views::Button* online_sign_in_message() const;
     views::View* disabled_auth_message() const;
     views::Button* challenge_response_button();
     views::Label* challenge_response_label();
     LoginAuthFactorsView* auth_factors_view() const;
     AuthFactorModel* fingerprint_auth_factor_model() const;
     AuthFactorModel* smart_lock_auth_factor_model() const;
     bool HasAuthMethod(AuthMethods auth_method) const;
     const std::u16string& GetDisabledAuthMessageContent() const;
     void SetFingerprintState(FingerprintState state) const;
     void SetSmartLockState(SmartLockState state) const;

    private:
     LoginAuthUserView* const view_;
   };

   using OnAuthCallback =
       base::RepeatingCallback<void(bool auth_success,
                                    bool display_error_messages)>;
   using OnEasyUnlockIconHovered = base::RepeatingClosure;

   struct Callbacks {
     Callbacks();
     Callbacks(const Callbacks& other);
     ~Callbacks();

     // Executed whenever an authentication result is available, such as when the
     // user submits a password or taps the user icon when AUTH_TAP is enabled.
     OnAuthCallback on_auth;
     // Called when the user taps the user view and AUTH_TAP is not enabled.
     LoginUserView::OnTap on_tap;
     // Called when the remove user warning message has been shown.
     LoginUserView::OnRemoveWarningShown on_remove_warning_shown;
     // Called when the user should be removed. The callback should do the actual
     // removal.
     LoginUserView::OnRemove on_remove;
     // Called when the easy unlock icon is hovered.
     OnEasyUnlockIconHovered on_easy_unlock_icon_hovered;
     // Called when the easy unlock icon is tapped.
     views::Button::PressedCallback on_easy_unlock_icon_tapped;
     // Called when LoginAuthFactorsView enters/exits a state where an auth
     // factor wants to hide the password and pin.
     base::RepeatingCallback<void(bool)>
         on_auth_factor_is_hiding_password_changed;
   };

   LoginAuthUserView(const LoginUserInfo& user, const Callbacks& callbacks);

   LoginAuthUserView(const LoginAuthUserView&) = delete;
   LoginAuthUserView& operator=(const LoginAuthUserView&) = delete;

   ~LoginAuthUserView() override;

   // Set the displayed set of auth methods. |auth_methods| contains or-ed
   // together AuthMethod values. |auth_metadata| provides additional control
   // parameters for the view. Must always be called in conjunction with
   // `CaptureStateForAnimationPreLayout` and `ApplyAnimationPostLayout`.
   void SetAuthMethods(
       uint32_t auth_methods,
       const AuthMethodsMetadata& auth_metadata = AuthMethodsMetadata());
   AuthMethods auth_methods() const { return auth_methods_; }
   InputFieldMode input_field_mode() const { return input_field_mode_; }

   // Add an easy unlock icon.
   void SetEasyUnlockIcon(EasyUnlockIconState icon_state,
                          const std::u16string& accessibility_label);

   // Captures any metadata about the current view state that will be used for
   // animation.
   void CaptureStateForAnimationPreLayout();
   // Applies animation based on current layout state compared to the most
   // recently captured state. If `animate` is false, the previous UI state
   // is released and no animation is performed.
   void ApplyAnimationPostLayout(bool animate);

   // Update the displayed name, icon, etc to that of |user|.
   void UpdateForUser(const LoginUserInfo& user);

   // Update the current fingerprint state.
   void SetFingerprintState(FingerprintState state);

   // Called to show a fingerprint authentication attempt result.
   void NotifyFingerprintAuthResult(bool success);

   // Update the current Smart Lock state.
   void SetSmartLockState(SmartLockState state);

   // Called to show a Smart Lock authentication attempt result.
   void NotifySmartLockAuthResult(bool success);

   // Set the parameters needed to render the message that is shown to user when
   // auth method is |AUTH_DISABLED|.
   void SetAuthDisabledMessage(const AuthDisabledData& auth_disabled_data);

   const LoginUserInfo& current_user() const;

   // Provides the view that should be the anchor to message bubbles. Either the
   // password field, or the PIN field.
   views::View* GetActiveInputView();
   LoginPasswordView* password_view() { return password_view_; }
   LoginUserView* user_view() { return user_view_; }

   // views::View:
   gfx::Size CalculatePreferredSize() const override;
   void RequestFocus() override;
   void OnGestureEvent(ui::GestureEvent* event) override;

   // NonAccessibleView:
   void OnThemeChanged() override;

  private:
   struct UiState;
   class FingerprintView;
   class ChallengeResponseView;
   class DisabledAuthMessageView;
   class LockedTpmMessageView;

   // Called when the user submits an auth method. Runs mojo call.
   void OnAuthSubmit(const std::u16string& password);
   // Called with the result of the request started in |OnAuthSubmit| or
   // |AttemptAuthenticateWithExternalBinary|.
   void OnAuthComplete(absl::optional<bool> auth_success);
   // Called with the result of the request started in
   // |AttemptAuthenticateWithChallengeResponse|.
   void OnChallengeResponseAuthComplete(absl::optional<bool> auth_success);

   // Called when the LoginAuthFactorsView "arrow button" is tapped for the
   // Smart Lock auth factor; the user's phone is unlocked and the user has
   // tapped this button in order to authenticate with Smart Lock.
   void OnSmartLockArrowButtonTapped();

   // Called when the user view has been tapped. This will run |on_auth_| if tap
   // to unlock is enabled, or run |OnOnlineSignInMessageTap| if the online
   // sign-in message is shown, otherwise it will run |on_tap_|.
   void OnUserViewTap();

   // Called when the online sign-in message is tapped. It opens the Gaia screen.
   void OnOnlineSignInMessageTap();

   // Called from LoginPinView, forwards the calls to the active input field.
   void OnPinPadBackspace();
   void OnPinPadInsertDigit(int digit);
   // Called from both input fields, forwards the call to LoginPinView (pin pad)
   void OnPasswordTextChanged(bool is_empty);
   void OnPinTextChanged(bool is_empty);

   // Helper method to check if an auth method is enable. Use it like this:
   // bool has_tap = HasAuthMethod(AUTH_TAP).
   bool HasAuthMethod(AuthMethods auth_method) const;

   // Whether the authentication attempt should use the user's PIN.
   bool ShouldAuthenticateWithPin() const;

   // TODO(crbug/899812): remove this and pass a handler in via the Callbacks
   // struct instead.
   void AttemptAuthenticateWithExternalBinary();

   // Called when the user triggered the challenge-response authentication. It
   // starts the asynchronous authentication process against a security token.
   void AttemptAuthenticateWithChallengeResponse();

   // Requests focus on the password view and shows the virtual keyboard if
   // enabled and if the PIN pad is not shown already.
   void RequestFocusOnPasswordView();

   // Updates the element in focus. Used in `ApplyAnimationPostLayout`.
   void UpdateFocus();

   // Updates the UI internally when the switch button is clicked to toggle
   // between pin and password.
   void OnSwitchButtonClicked();

   // Determines the mode of the input field based on the available
   // authentication methods.
   void UpdateInputFieldMode();

   // Convenience methods to determine element visibility.
   bool ShouldShowPinPad() const;
   bool ShouldShowPasswordField() const;
   bool ShouldShowPinInputField() const;
   bool ShouldShowToggle() const;

   // Convenience methods to determine the necessary paddings.
   gfx::Size GetPaddingBelowUserView() const;
   gfx::Size GetPaddingBelowPasswordView() const;

   // Convenience methods to determine UI text based on the InputFieldMode.
   std::u16string GetPinPasswordToggleText() const;
   std::u16string GetPasswordViewPlaceholder() const;
   std::u16string GetMultiprofileDisableAuthMessage() const;

   // Authentication methods available and extra parameters that control the UI.
   AuthMethods auth_methods_ = AUTH_NONE;
   AuthMethodsMetadata auth_metadata_ = AuthMethodsMetadata();

   // Controls which input field is currently being shown.
   InputFieldMode input_field_mode_ = InputFieldMode::NONE;

   // TODO(https://crbug.com/1233614): Remove this field once the Smart Lock UI
   // revamp is complete.
   bool smart_lock_ui_revamp_enabled_ = false;

   LoginUserView* user_view_ = nullptr;
   LoginPasswordView* password_view_ = nullptr;
   LoginPinInputView* pin_input_view_ = nullptr;
   views::LabelButton* pin_password_toggle_ = nullptr;
   LoginPinView* pin_view_ = nullptr;
   views::LabelButton* online_sign_in_button_ = nullptr;
   DisabledAuthMessageView* disabled_auth_message_ = nullptr;
   FingerprintView* fingerprint_view_ = nullptr;
   LoginAuthFactorsView* auth_factors_view_ = nullptr;
   FingerprintAuthFactorModel* fingerprint_auth_factor_model_ = nullptr;
   SmartLockAuthFactorModel* smart_lock_auth_factor_model_ = nullptr;
   ChallengeResponseView* challenge_response_view_ = nullptr;
   LockedTpmMessageView* locked_tpm_message_view_ = nullptr;

   // Padding below the user view. Grows when there isn't an input field
   // or smart card login.
   NonAccessibleView* padding_below_user_view_ = nullptr;
   // Displays padding between:
   // 1. Password field and pin keyboard
   // 2. Password field and fingerprint view, when pin is not available.
   // Preferred size will change base on current auth method.
   NonAccessibleView* padding_below_password_view_ = nullptr;
   const OnAuthCallback on_auth_;
   const LoginUserView::OnTap on_tap_;

   // UI state that was stored before setting new authentication methods.
   // Generated by `CaptureStateForAnimationPreLayout` and consumed by
   // `ApplyAnimationPostLayout`.
   std::unique_ptr<UiState> previous_state_;

   base::WeakPtrFactory<LoginAuthUserView> weak_factory_{this};
 };

 }  // namespace ash

 #endif  // ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_
	// Copyright 2017 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#ifndef ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_
	#define ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_

	#include <stdint.h>
	#include <memory>

	#include "ash/ash_export.h"
	#include "ash/login/ui/auth_factor_model.h"
	#include "ash/login/ui/login_error_bubble.h"
	#include "ash/login/ui/login_password_view.h"
	#include "ash/login/ui/login_user_view.h"
	#include "ash/login/ui/non_accessible_view.h"
	#include "ash/public/cpp/login_types.h"
	#include "ash/public/cpp/session/user_info.h"
	#include "base/callback.h"
	#include "base/memory/weak_ptr.h"
	#include "base/time/time.h"
	#include "third_party/abseil-cpp/absl/types/optional.h"
	#include "ui/views/controls/button/button.h"
	#include "ui/views/view.h"

	namespace views {
	class LabelButton;
	}

	namespace ash {

	class LoginAuthFactorsView;
	class FingerprintAuthFactorModel;
	class SmartLockAuthFactorModel;
	class LoginPasswordView;
	class LoginPinView;
	class LoginPinInputView;
	enum class SmartLockState;

	// Wraps a UserView which also has authentication available. Adds additional
	// views below the UserView instance which show authentication UIs.
	//
	// This class will make call mojo authentication APIs directly. The embedder can
	// receive some events about the results of those mojo
	// authentication attempts (ie, success/failure).
	class ASH_EXPORT LoginAuthUserView : public NonAccessibleView {
	public:
	// Flags which describe the set of currently visible auth methods.
	enum AuthMethods {
	AUTH_NONE = 0, // No extra auth methods.
	AUTH_PASSWORD = 1 << 0, // Display password.
	AUTH_PIN = 1 << 1, // Display PIN keyboard.
	AUTH_TAP = 1 << 2, // [DEPRECATED] Tap to unlock.
	// TODO(b/217970801): Remove this field.
	AUTH_ONLINE_SIGN_IN = 1 << 3, // Force online sign-in.
	AUTH_FINGERPRINT = 1 << 4, // Use fingerprint to unlock.
	AUTH_SMART_LOCK = 1 << 5, // Use Smart Lock to unlock.
	AUTH_CHALLENGE_RESPONSE = 1 << 6, // Authenticate via challenge-response
	// protocol using security token.
	AUTH_DISABLED = 1 << 7, // Disable all the auth methods and show a
	// message to user.
	AUTH_DISABLED_TPM_LOCKED = 1 << 8, // Disable all the auth methods due
	// to the TPM being locked
	AUTH_AUTH_FACTOR_IS_HIDING_PASSWORD =
	1 << 9, // Hide the password/pin fields and slide the auth factors
	// up. This happens, for example, when an auth factor requires
	// the user to click a button as a final step. Note that if
	// this bit is set, the password/pin will be hidden even if
	// AUTH_PASSWORD and/or AUTH_PIN are set.
	};

	// Extra control parameters to be passed when setting the auth methods.
	struct AuthMethodsMetadata {
	AuthMethodsMetadata();
	~AuthMethodsMetadata();
	AuthMethodsMetadata(const AuthMethodsMetadata&);

	// If the virtual keyboard is visible, the pinpad is hidden.
	bool virtual_keyboard_visible = false;
	// Whether to show the pinpad for the password field.
	bool show_pinpad_for_pw = false;
	// User's pin length to use for autosubmit.
	size_t autosubmit_pin_length = 0;
	// Only present when the TPM is locked.
	absl::optional<base::TimeDelta> time_until_tpm_unlock = absl::nullopt;
	};

	// Possible states that the input fields (PasswordView & PinInputView)
	// might be in. This is determined by the current authentication methods
	// that a user has.
	enum class InputFieldMode {
	NONE, // Not showing any input field.
	PASSWORD_ONLY, // No PIN set. Password only field.
	PIN_AND_PASSWORD, // PIN set, but auto-submit feature disabled.
	PIN_WITH_TOGGLE, // PIN field for auto submit.
	PWD_WITH_TOGGLE // PWD field when auto submit enabled.
	};

	// TestApi is used for tests to get internal implementation details.
	class ASH_EXPORT TestApi {
	public:
	explicit TestApi(LoginAuthUserView* view);
	~TestApi();

	LoginUserView* user_view() const;
	LoginPasswordView* password_view() const;
	LoginPinView* pin_view() const;
	LoginPinInputView* pin_input_view() const;
	views::Button* pin_password_toggle() const;
	views::Button* online_sign_in_message() const;
	views::View* disabled_auth_message() const;
	views::Button* challenge_response_button();
	views::Label* challenge_response_label();
	LoginAuthFactorsView* auth_factors_view() const;
	AuthFactorModel* fingerprint_auth_factor_model() const;
	AuthFactorModel* smart_lock_auth_factor_model() const;
	bool HasAuthMethod(AuthMethods auth_method) const;
	const std::u16string& GetDisabledAuthMessageContent() const;
	void SetFingerprintState(FingerprintState state) const;
	void SetSmartLockState(SmartLockState state) const;

	private:
	LoginAuthUserView* const view_;
	};

	using OnAuthCallback =
	base::RepeatingCallback<void(bool auth_success,
	bool display_error_messages)>;
	using OnEasyUnlockIconHovered = base::RepeatingClosure;

	struct Callbacks {
	Callbacks();
	Callbacks(const Callbacks& other);
	~Callbacks();

	// Executed whenever an authentication result is available, such as when the
	// user submits a password or taps the user icon when AUTH_TAP is enabled.
	OnAuthCallback on_auth;
	// Called when the user taps the user view and AUTH_TAP is not enabled.
	LoginUserView::OnTap on_tap;
	// Called when the remove user warning message has been shown.
	LoginUserView::OnRemoveWarningShown on_remove_warning_shown;
	// Called when the user should be removed. The callback should do the actual
	// removal.
	LoginUserView::OnRemove on_remove;
	// Called when the easy unlock icon is hovered.
	OnEasyUnlockIconHovered on_easy_unlock_icon_hovered;
	// Called when the easy unlock icon is tapped.
	views::Button::PressedCallback on_easy_unlock_icon_tapped;
	// Called when LoginAuthFactorsView enters/exits a state where an auth
	// factor wants to hide the password and pin.
	base::RepeatingCallback<void(bool)>
	on_auth_factor_is_hiding_password_changed;
	};

	LoginAuthUserView(const LoginUserInfo& user, const Callbacks& callbacks);

	LoginAuthUserView(const LoginAuthUserView&) = delete;
	LoginAuthUserView& operator=(const LoginAuthUserView&) = delete;

	~LoginAuthUserView() override;

	// Set the displayed set of auth methods. \|auth_methods\| contains or-ed
	// together AuthMethod values. \|auth_metadata\| provides additional control
	// parameters for the view. Must always be called in conjunction with
	// `CaptureStateForAnimationPreLayout` and `ApplyAnimationPostLayout`.
	void SetAuthMethods(
	uint32_t auth_methods,
	const AuthMethodsMetadata& auth_metadata = AuthMethodsMetadata());
	AuthMethods auth_methods() const { return auth_methods_; }
	InputFieldMode input_field_mode() const { return input_field_mode_; }

	// Add an easy unlock icon.
	void SetEasyUnlockIcon(EasyUnlockIconState icon_state,
	const std::u16string& accessibility_label);

	// Captures any metadata about the current view state that will be used for
	// animation.
	void CaptureStateForAnimationPreLayout();
	// Applies animation based on current layout state compared to the most
	// recently captured state. If `animate` is false, the previous UI state
	// is released and no animation is performed.
	void ApplyAnimationPostLayout(bool animate);

	// Update the displayed name, icon, etc to that of \|user\|.
	void UpdateForUser(const LoginUserInfo& user);

	// Update the current fingerprint state.
	void SetFingerprintState(FingerprintState state);

	// Called to show a fingerprint authentication attempt result.
	void NotifyFingerprintAuthResult(bool success);

	// Update the current Smart Lock state.
	void SetSmartLockState(SmartLockState state);

	// Called to show a Smart Lock authentication attempt result.
	void NotifySmartLockAuthResult(bool success);

	// Set the parameters needed to render the message that is shown to user when
	// auth method is \|AUTH_DISABLED\|.
	void SetAuthDisabledMessage(const AuthDisabledData& auth_disabled_data);

	const LoginUserInfo& current_user() const;

	// Provides the view that should be the anchor to message bubbles. Either the
	// password field, or the PIN field.
	views::View* GetActiveInputView();
	LoginPasswordView* password_view() { return password_view_; }
	LoginUserView* user_view() { return user_view_; }

	// views::View:
	gfx::Size CalculatePreferredSize() const override;
	void RequestFocus() override;
	void OnGestureEvent(ui::GestureEvent* event) override;

	// NonAccessibleView:
	void OnThemeChanged() override;

	private:
	struct UiState;
	class FingerprintView;
	class ChallengeResponseView;
	class DisabledAuthMessageView;
	class LockedTpmMessageView;

	// Called when the user submits an auth method. Runs mojo call.
	void OnAuthSubmit(const std::u16string& password);
	// Called with the result of the request started in \|OnAuthSubmit\| or
	// \|AttemptAuthenticateWithExternalBinary\|.
	void OnAuthComplete(absl::optional<bool> auth_success);
	// Called with the result of the request started in
	// \|AttemptAuthenticateWithChallengeResponse\|.
	void OnChallengeResponseAuthComplete(absl::optional<bool> auth_success);

	// Called when the LoginAuthFactorsView "arrow button" is tapped for the
	// Smart Lock auth factor; the user's phone is unlocked and the user has
	// tapped this button in order to authenticate with Smart Lock.
	void OnSmartLockArrowButtonTapped();

	// Called when the user view has been tapped. This will run \|on_auth_\| if tap
	// to unlock is enabled, or run \|OnOnlineSignInMessageTap\| if the online
	// sign-in message is shown, otherwise it will run \|on_tap_\|.
	void OnUserViewTap();

	// Called when the online sign-in message is tapped. It opens the Gaia screen.
	void OnOnlineSignInMessageTap();

	// Called from LoginPinView, forwards the calls to the active input field.
	void OnPinPadBackspace();
	void OnPinPadInsertDigit(int digit);
	// Called from both input fields, forwards the call to LoginPinView (pin pad)
	void OnPasswordTextChanged(bool is_empty);
	void OnPinTextChanged(bool is_empty);

	// Helper method to check if an auth method is enable. Use it like this:
	// bool has_tap = HasAuthMethod(AUTH_TAP).
	bool HasAuthMethod(AuthMethods auth_method) const;

	// Whether the authentication attempt should use the user's PIN.
	bool ShouldAuthenticateWithPin() const;

	// TODO(crbug/899812): remove this and pass a handler in via the Callbacks
	// struct instead.
	void AttemptAuthenticateWithExternalBinary();

	// Called when the user triggered the challenge-response authentication. It
	// starts the asynchronous authentication process against a security token.
	void AttemptAuthenticateWithChallengeResponse();

	// Requests focus on the password view and shows the virtual keyboard if
	// enabled and if the PIN pad is not shown already.
	void RequestFocusOnPasswordView();

	// Updates the element in focus. Used in `ApplyAnimationPostLayout`.
	void UpdateFocus();

	// Updates the UI internally when the switch button is clicked to toggle
	// between pin and password.
	void OnSwitchButtonClicked();

	// Determines the mode of the input field based on the available
	// authentication methods.
	void UpdateInputFieldMode();

	// Convenience methods to determine element visibility.
	bool ShouldShowPinPad() const;
	bool ShouldShowPasswordField() const;
	bool ShouldShowPinInputField() const;
	bool ShouldShowToggle() const;

	// Convenience methods to determine the necessary paddings.
	gfx::Size GetPaddingBelowUserView() const;
	gfx::Size GetPaddingBelowPasswordView() const;

	// Convenience methods to determine UI text based on the InputFieldMode.
	std::u16string GetPinPasswordToggleText() const;
	std::u16string GetPasswordViewPlaceholder() const;
	std::u16string GetMultiprofileDisableAuthMessage() const;

	// Authentication methods available and extra parameters that control the UI.
	AuthMethods auth_methods_ = AUTH_NONE;
	AuthMethodsMetadata auth_metadata_ = AuthMethodsMetadata();

	// Controls which input field is currently being shown.
	InputFieldMode input_field_mode_ = InputFieldMode::NONE;

	// TODO(https://crbug.com/1233614): Remove this field once the Smart Lock UI
	// revamp is complete.
	bool smart_lock_ui_revamp_enabled_ = false;

	LoginUserView* user_view_ = nullptr;
	LoginPasswordView* password_view_ = nullptr;
	LoginPinInputView* pin_input_view_ = nullptr;
	views::LabelButton* pin_password_toggle_ = nullptr;
	LoginPinView* pin_view_ = nullptr;
	views::LabelButton* online_sign_in_button_ = nullptr;
	DisabledAuthMessageView* disabled_auth_message_ = nullptr;
	FingerprintView* fingerprint_view_ = nullptr;
	LoginAuthFactorsView* auth_factors_view_ = nullptr;
	FingerprintAuthFactorModel* fingerprint_auth_factor_model_ = nullptr;
	SmartLockAuthFactorModel* smart_lock_auth_factor_model_ = nullptr;
	ChallengeResponseView* challenge_response_view_ = nullptr;
	LockedTpmMessageView* locked_tpm_message_view_ = nullptr;

	// Padding below the user view. Grows when there isn't an input field
	// or smart card login.
	NonAccessibleView* padding_below_user_view_ = nullptr;
	// Displays padding between:
	// 1. Password field and pin keyboard
	// 2. Password field and fingerprint view, when pin is not available.
	// Preferred size will change base on current auth method.
	NonAccessibleView* padding_below_password_view_ = nullptr;
	const OnAuthCallback on_auth_;
	const LoginUserView::OnTap on_tap_;

	// UI state that was stored before setting new authentication methods.
	// Generated by `CaptureStateForAnimationPreLayout` and consumed by
	// `ApplyAnimationPostLayout`.
	std::unique_ptr<UiState> previous_state_;

	base::WeakPtrFactory<LoginAuthUserView> weak_factory_{this};
	};

	} // namespace ash

	#endif // ASH_LOGIN_UI_LOGIN_AUTH_USER_VIEW_H_