[Bouncer] Update bouncer view with display size.

Updates the bouncer view when display size has changed and when font
scale has changed. When this specific configuration changes, we
invalidate the cache of the view flipper and tell each view mode that
the configuration change has been made. In the UserSwitcher view mode,
we reinflate the user switcher.

Fixes: 257513443
Test: Change display size, turn screen off and on and observe security
view and user switcher has changed size. (On Pin, Password, and pattern)
Test: Change font size and bold font, turn screen off and on and observe security
view and user switcher has changed size. (On Pin, Password, and pattern)
Test: Added unit test.

Change-Id: Iffbbe6f5b0f32f4b40dd70e9bd534b444a8d1ef6

packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainer.java

@@ -727,6 +727,11 @@ public class KeyguardSecurityContainer extends ConstraintLayout {
         mViewMode.reloadColors();
     }
 
+    /** Handles density or font scale changes. */
+    void onDensityOrFontScaleChanged() {
+        mViewMode.onDensityOrFontScaleChanged();
+    }
+
     /**
      * Enscapsulates the differences between bouncer modes for the container.
      */
@@ -752,6 +757,9 @@ public class KeyguardSecurityContainer extends ConstraintLayout {
         /** Refresh colors */
         default void reloadColors() {};
 
+        /** Handles density or font scale changes. */
+        default void onDensityOrFontScaleChanged() {}
+
         /** On a successful auth, optionally handle how the view disappears */
         default void startDisappearAnimation(SecurityMode securityMode) {};
 
@@ -899,14 +907,9 @@ public class KeyguardSecurityContainer extends ConstraintLayout {
             mFalsingA11yDelegate = falsingA11yDelegate;
 
             if (mUserSwitcherViewGroup == null) {
-                LayoutInflater.from(v.getContext()).inflate(
-                        R.layout.keyguard_bouncer_user_switcher,
-                        mView,
-                        true);
-                mUserSwitcherViewGroup =  mView.findViewById(R.id.keyguard_bouncer_user_switcher);
+                inflateUserSwitcher();
             }
             updateSecurityViewLocation();
-            mUserSwitcher = mView.findViewById(R.id.user_switcher_header);
             setupUserSwitcher();
             mUserSwitcherController.addUserSwitchCallback(mUserSwitchCallback);
         }
@@ -936,6 +939,12 @@ public class KeyguardSecurityContainer extends ConstraintLayout {
             }
         }
 
+        @Override
+        public void onDensityOrFontScaleChanged() {
+            mView.removeView(mUserSwitcherViewGroup);
+            inflateUserSwitcher();
+        }
+
         @Override
         public void onDestroy() {
             mUserSwitcherController.removeUserSwitchCallback(mUserSwitchCallback);
@@ -1137,6 +1146,15 @@ public class KeyguardSecurityContainer extends ConstraintLayout {
             }
         }
 
+        private void inflateUserSwitcher() {
+            LayoutInflater.from(mView.getContext()).inflate(
+                    R.layout.keyguard_bouncer_user_switcher,
+                    mView,
+                    true);
+            mUserSwitcherViewGroup = mView.findViewById(R.id.keyguard_bouncer_user_switcher);
+            mUserSwitcher = mView.findViewById(R.id.user_switcher_header);
+        }
+
         interface UserSwitcherCallback {
             void showUnlockToContinueMessage();
         }

packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java

@@ -251,6 +251,11 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
                 public void onUiModeChanged() {
                     reloadColors();
                 }
+
+                @Override
+                public void onDensityOrFontScaleChanged() {
+                    KeyguardSecurityContainerController.this.onDensityOrFontScaleChanged();
+                }
             };
     private boolean mBouncerVisible = false;
     private final KeyguardUpdateMonitorCallback mKeyguardUpdateMonitorCallback =
@@ -727,6 +732,14 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
         mView.reloadColors();
     }
 
+    /** Handles density or font scale changes. */
+    private void onDensityOrFontScaleChanged() {
+        mSecurityViewFlipperController.onDensityOrFontScaleChanged();
+        mSecurityViewFlipperController.getSecurityView(mCurrentSecurityMode,
+                mKeyguardSecurityCallback);
+        mView.onDensityOrFontScaleChanged();
+    }
+
     static class Factory {
 
         private final KeyguardSecurityContainer mView;

packages/SystemUI/src/com/android/keyguard/KeyguardSecurityViewFlipperController.java

@@ -83,6 +83,13 @@ public class KeyguardSecurityViewFlipperController
         }
     }
 
+    /** Handles density or font scale changes. */
+    public void onDensityOrFontScaleChanged() {
+        mView.removeAllViews();
+        mChildren.clear();
+    }
+
+
     @VisibleForTesting
     KeyguardInputViewController<KeyguardInputView> getSecurityView(SecurityMode securityMode,
             KeyguardSecurityCallback keyguardSecurityCallback) {

packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerControllerTest.java

@@ -548,6 +548,22 @@ public class KeyguardSecurityContainerControllerTest extends SysuiTestCase {
         verify(mKeyguardPasswordViewControllerMock, never()).showMessage(null, null);
     }
 
+    @Test
+    public void onDensityorFontScaleChanged() {
+        ArgumentCaptor<ConfigurationController.ConfigurationListener>
+                configurationListenerArgumentCaptor = ArgumentCaptor.forClass(
+                ConfigurationController.ConfigurationListener.class);
+        mKeyguardSecurityContainerController.onViewAttached();
+        verify(mConfigurationController).addCallback(configurationListenerArgumentCaptor.capture());
+        configurationListenerArgumentCaptor.getValue().onDensityOrFontScaleChanged();
+
+        verify(mView).onDensityOrFontScaleChanged();
+        verify(mKeyguardSecurityViewFlipperController).onDensityOrFontScaleChanged();
+        verify(mKeyguardSecurityViewFlipperController).getSecurityView(any(SecurityMode.class),
+                any(KeyguardSecurityCallback.class));
+    }
+
+
     private KeyguardSecurityContainer.SwipeListener getRegisteredSwipeListener() {
         mKeyguardSecurityContainerController.onViewAttached();
         verify(mView).setSwipeListener(mSwipeListenerArgumentCaptor.capture());

packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerTest.java

@@ -307,6 +307,17 @@ public class KeyguardSecurityContainerTest extends SysuiTestCase {
         assertThat(anchor.isClickable()).isTrue();
     }
 
+    @Test
+    public void testOnDensityOrFontScaleChanged() {
+        setupUserSwitcher();
+        View oldUserSwitcher = mKeyguardSecurityContainer.findViewById(
+                R.id.keyguard_bouncer_user_switcher);
+        mKeyguardSecurityContainer.onDensityOrFontScaleChanged();
+        View newUserSwitcher = mKeyguardSecurityContainer.findViewById(
+                R.id.keyguard_bouncer_user_switcher);
+        assertThat(oldUserSwitcher).isNotEqualTo(newUserSwitcher);
+    }
+
     @Test
     public void testTouchesAreRecognizedAsBeingOnTheOtherSideOfSecurity() {
         setupUserSwitcher();

packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityViewFlipperControllerTest.java

@@ -106,4 +106,10 @@ public class KeyguardSecurityViewFlipperControllerTest extends SysuiTestCase {
             }
         }
     }
+
+    @Test
+    public void onDensityOrFontScaleChanged() {
+        mKeyguardSecurityViewFlipperController.onDensityOrFontScaleChanged();
+        verify(mView).removeAllViews();
+    }
 }