Don't allow users to be switched on keyguard when multiple users is disabled

Currently, if there is only one user, and "add users from lockscreen" is  disabled, the Keyguard user-switcher dropdown sticks around to display the current user.

The changes here will maintain visual parity with that user experience when "multiple users" is disabled.

Bug: b/269399217
Test: atest BaseUserSwitcherAdapterTest
Change-Id: Id808e3ecd34de57f19976101eb1a9c37831f26b9

packages/SystemUI/src/com/android/systemui/statusbar/policy/BaseUserSwitcherAdapter.kt

@@ -35,7 +35,10 @@ protected constructor(
 ) : BaseAdapter() {
 
     protected open val users: List<UserRecord>
-        get() = controller.users.filter { !controller.isKeyguardShowing || !it.isRestricted }
+        get() = controller.users.filter {
+            (!controller.isKeyguardShowing || !it.isRestricted) &&
+                (controller.isUserSwitcherEnabled || it.isCurrent)
+        }
 
     init {
         controller.addAdapter(WeakReference(this))

packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.kt

@@ -67,6 +67,9 @@ constructor(
     val isSimpleUserSwitcher: Boolean
         get() = userInteractor.isSimpleUserSwitcher
 
+    val isUserSwitcherEnabled: Boolean
+        get() = userInteractor.isUserSwitcherEnabled
+
     /** The [UserRecord] of the current user or `null` when none. */
     val currentUserRecord: UserRecord?
         get() = userInteractor.selectedUserRecord.value

packages/SystemUI/src/com/android/systemui/user/data/repository/UserRepository.kt

@@ -105,6 +105,8 @@ interface UserRepository {
     fun getSelectedUserInfo(): UserInfo
 
     fun isSimpleUserSwitcher(): Boolean
+
+    fun isUserSwitcherEnabled(): Boolean
 }
 
 @SysUISingleton
@@ -206,6 +208,10 @@ constructor(
         return _userSwitcherSettings.value.isSimpleUserSwitcher
     }
 
+    override fun isUserSwitcherEnabled(): Boolean {
+        return _userSwitcherSettings.value.isUserSwitcherEnabled
+    }
+
     private fun observeUserSwitching() {
         conflatedCallbackFlow {
                 val callback =

packages/SystemUI/src/com/android/systemui/user/domain/interactor/UserInteractor.kt

@@ -294,6 +294,10 @@ constructor(
 
     val isSimpleUserSwitcher: Boolean
         get() = repository.isSimpleUserSwitcher()
+
+    val isUserSwitcherEnabled: Boolean
+        get() = repository.isUserSwitcherEnabled()
+
     val keyguardUpdateMonitorCallback =
         object : KeyguardUpdateMonitorCallback() {
             override fun onKeyguardGoingAway() {
@@ -370,6 +374,7 @@ constructor(
         }
 
         pw.println("isSimpleUserSwitcher=$isSimpleUserSwitcher")
+        pw.println("isUserSwitcherEnabled=$isUserSwitcherEnabled")
         pw.println("isGuestUserAutoCreated=$isGuestUserAutoCreated")
     }
 

packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/BaseUserSwitcherAdapterTest.kt

@@ -77,6 +77,7 @@ class BaseUserSwitcherAdapterTest : SysuiTestCase() {
             )
 
         whenever(controller.users).thenAnswer { users }
+        whenever(controller.isUserSwitcherEnabled).thenReturn(true)
 
         underTest =
             object : BaseUserSwitcherAdapter(controller) {
@@ -161,6 +162,19 @@ class BaseUserSwitcherAdapterTest : SysuiTestCase() {
         assertThat(underTest.count).isEqualTo(users.size)
     }
 
+    @Test
+    fun count_onlyShowsCurrentUserWhenMultiUserDisabled() {
+        whenever(controller.isUserSwitcherEnabled).thenReturn(false)
+        assertThat(underTest.count).isEqualTo(1)
+        assertThat(underTest.getItem(0).isCurrent).isTrue()
+    }
+
+    @Test
+    fun count_doesNotIgnoreAllOtherUsersWhenMultiUserEnabled() {
+        whenever(controller.isUserSwitcherEnabled).thenReturn(true)
+        assertThat(underTest.count).isEqualTo(users.size)
+    }
+
     @Test
     fun getItem() {
         assertThat((0 until underTest.count).map { position -> underTest.getItem(position) })

packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/KeyguardUserSwitcherAdapterTest.kt

@@ -29,6 +29,7 @@ import com.android.systemui.R
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.qs.tiles.UserDetailItemView
 import com.android.systemui.user.data.source.UserRecord
+import com.android.systemui.util.mockito.whenever
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertNotNull
 import org.junit.Assert.assertTrue
@@ -68,6 +69,8 @@ class KeyguardUserSwitcherAdapterTest : SysuiTestCase() {
     fun setUp() {
         MockitoAnnotations.initMocks(this)
 
+        whenever(userSwitcherController.isUserSwitcherEnabled).thenReturn(true)
+
         mContext.addMockSystemService(Context.LAYOUT_INFLATER_SERVICE, layoutInflater)
         `when`(layoutInflater.inflate(anyInt(), any(ViewGroup::class.java), anyBoolean()))
                 .thenReturn(inflatedUserDetailItemView)

packages/SystemUI/tests/utils/src/com/android/systemui/user/data/repository/FakeUserRepository.kt

@@ -79,6 +79,10 @@ class FakeUserRepository : UserRepository {
         return _userSwitcherSettings.value.isSimpleUserSwitcher
     }
 
+    override fun isUserSwitcherEnabled(): Boolean {
+        return _userSwitcherSettings.value.isUserSwitcherEnabled
+    }
+
     fun setUserInfos(infos: List<UserInfo>) {
         _userInfos.value = infos
     }