Show floating rotation button in sticky immersive mode if taskbar is used

Bug: 241245977
Bug: 216182085
Test: atest SystemUITests:RotationButtonControllerTest
Change-Id: I1664241cc8cd156e301466c06c92090c1eb5be8d

packages/SystemUI/shared/src/com/android/systemui/shared/rotation/RotationButtonController.java

@@ -49,6 +49,7 @@ import android.view.accessibility.AccessibilityManager;
 import android.view.animation.Interpolator;
 import android.view.animation.LinearInterpolator;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.UiEvent;
 import com.android.internal.logging.UiEventLogger;
 import com.android.internal.logging.UiEventLoggerImpl;
@@ -99,6 +100,7 @@ public class RotationButtonController {
     private @WindowInsetsController.Behavior
     int mBehavior = WindowInsetsController.BEHAVIOR_DEFAULT;
     private int mNavBarMode;
+    private boolean mTaskBarVisible = false;
     private boolean mSkipOverrideUserLockPrefsOnce;
     private final int mLightIconColor;
     private final int mDarkIconColor;
@@ -422,6 +424,7 @@ public class RotationButtonController {
     }
 
     public void onTaskbarStateChange(boolean visible, boolean stashed) {
+        mTaskBarVisible = visible;
         if (getRotationButton() == null) {
             return;
         }
@@ -438,9 +441,12 @@ public class RotationButtonController {
      * Return true when either the task bar is visible or it's in visual immersive mode.
      */
     @SuppressLint("InlinedApi")
-    private boolean canShowRotationButton() {
-        return mIsNavigationBarShowing || mBehavior == WindowInsetsController.BEHAVIOR_DEFAULT
-                || isGesturalMode(mNavBarMode);
+    @VisibleForTesting
+    boolean canShowRotationButton() {
+        return mIsNavigationBarShowing
+            || mBehavior == WindowInsetsController.BEHAVIOR_DEFAULT
+            || isGesturalMode(mNavBarMode)
+            || mTaskBarVisible;
     }
 
     @DrawableRes
@@ -624,4 +630,3 @@ public class RotationButtonController {
         }
     }
 }
-

packages/SystemUI/tests/src/com/android/systemui/shared/rotation/RotationButtonControllerTest.kt

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.systemui.shared.rotation
+
+import android.testing.AndroidTestingRunner
+import android.testing.TestableLooper.RunWithLooper
+import android.view.Display
+import android.view.WindowInsetsController
+import android.view.WindowManagerPolicyConstants
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidTestingRunner::class)
+@SmallTest
+@RunWithLooper
+class RotationButtonControllerTest : SysuiTestCase() {
+
+  private lateinit var mController: RotationButtonController
+
+  @Before
+  fun setUp() {
+    mController = RotationButtonController(
+      mContext,
+      /* lightIconColor = */ 0,
+      /* darkIconColor = */ 0,
+      /* iconCcwStart0ResId = */ 0,
+      /* iconCcwStart90ResId = */ 0,
+      /* iconCwStart0ResId = */ 0,
+      /* iconCwStart90ResId = */ 0
+    ) { 0 }
+  }
+
+  @Test
+  fun ifGestural_showRotationSuggestion() {
+    mController.onNavigationBarWindowVisibilityChange( /* showing = */ false)
+    mController.onBehaviorChanged(Display.DEFAULT_DISPLAY,
+                                  WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE)
+    mController.onNavigationModeChanged(WindowManagerPolicyConstants.NAV_BAR_MODE_3BUTTON)
+    mController.onTaskbarStateChange( /* visible = */ false, /* stashed = */ false)
+    assertThat(mController.canShowRotationButton()).isFalse()
+
+    mController.onNavigationModeChanged(WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL)
+
+    assertThat(mController.canShowRotationButton()).isTrue()
+  }
+
+  @Test
+  fun ifTaskbarVisible_showRotationSuggestion() {
+    mController.onNavigationBarWindowVisibilityChange( /* showing = */ false)
+    mController.onBehaviorChanged(Display.DEFAULT_DISPLAY,
+                                    WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE)
+    mController.onNavigationModeChanged(WindowManagerPolicyConstants.NAV_BAR_MODE_3BUTTON)
+    mController.onTaskbarStateChange( /* visible = */ false, /* stashed = */ false)
+    assertThat(mController.canShowRotationButton()).isFalse()
+
+    mController.onTaskbarStateChange( /* visible = */ true, /* stashed = */ false)
+
+    assertThat(mController.canShowRotationButton()).isTrue()
+  }
+}