Merge "Revert^2 "DevicePostureControlller to use the device posture of the device display"" into main
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureController.java
index bbba19d..87df180 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureController.java
@@ -73,7 +73,11 @@
 
     /** Callback to be notified about device posture changes. */
     interface Callback {
-        /** Called when the posture changes. */
+        /**
+         * Called when the posture changes. If there are multiple active displays ("concurrent"),
+         * this will report the physical posture of the device (also known as the base device
+         * state).
+         */
         void onPostureChanged(@DevicePostureInt int posture);
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureControllerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureControllerImpl.java
index 8f1ac81..422aa4d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureControllerImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/DevicePostureControllerImpl.java
@@ -39,8 +39,11 @@
 /** Implementation of {@link DevicePostureController} using the DeviceStateManager. */
 @SysUISingleton
 public class DevicePostureControllerImpl implements DevicePostureController {
+    /** From androidx.window.common.COMMON_STATE_USE_BASE_STATE */
+    private static final int COMMON_STATE_USE_BASE_STATE = 1000;
     private final List<Callback> mListeners = new ArrayList<>();
     private int mCurrentDevicePosture = DEVICE_POSTURE_UNKNOWN;
+    private int mCurrentBasePosture = DEVICE_POSTURE_UNKNOWN;
 
     private final SparseIntArray mDeviceStateToPostureMap = new SparseIntArray();
 
@@ -73,16 +76,32 @@
             mDeviceStateToPostureMap.put(deviceState, posture);
         }
 
-        deviceStateManager.registerCallback(executor, state -> {
-            Assert.isMainThread();
-            mCurrentDevicePosture =
-                    mDeviceStateToPostureMap.get(state, DEVICE_POSTURE_UNKNOWN);
+        deviceStateManager.registerCallback(executor, new DeviceStateManager.DeviceStateCallback() {
+            @Override
+            public void onStateChanged(int state) {
+                Assert.isMainThread();
+                mCurrentDevicePosture =
+                        mDeviceStateToPostureMap.get(state, DEVICE_POSTURE_UNKNOWN);
+                sendUpdatePosture();
+            }
 
-            ListenersTracing.INSTANCE.forEachTraced(mListeners, "DevicePostureControllerImpl",
+            @Override
+            public void onBaseStateChanged(int state) {
+                Assert.isMainThread();
+                mCurrentBasePosture = mDeviceStateToPostureMap.get(state, DEVICE_POSTURE_UNKNOWN);
+
+                if (useBaseState()) {
+                    sendUpdatePosture();
+                }
+            }
+
+            private void sendUpdatePosture() {
+                ListenersTracing.INSTANCE.forEachTraced(mListeners, "DevicePostureControllerImpl",
                     l -> {
-                        l.onPostureChanged(mCurrentDevicePosture);
+                        l.onPostureChanged(getDevicePosture());
                         return Unit.INSTANCE;
                     });
+            }
         });
     }
 
@@ -100,6 +119,14 @@
 
     @Override
     public int getDevicePosture() {
-        return mCurrentDevicePosture;
+        if (useBaseState()) {
+            return mCurrentBasePosture;
+        } else {
+            return mCurrentDevicePosture;
+        }
+    }
+
+    private boolean useBaseState() {
+        return mCurrentDevicePosture == COMMON_STATE_USE_BASE_STATE;
     }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/DevicePostureControllerImplTest.kt b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/DevicePostureControllerImplTest.kt
new file mode 100644
index 0000000..ce47170
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/DevicePostureControllerImplTest.kt
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2021 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.statusbar.policy
+
+import android.hardware.devicestate.DeviceStateManager
+import android.testing.AndroidTestingRunner
+import android.testing.TestableLooper
+import android.testing.TestableResources
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.statusbar.policy.DevicePostureController.DEVICE_POSTURE_CLOSED
+import com.android.systemui.statusbar.policy.DevicePostureController.DEVICE_POSTURE_FLIPPED
+import com.android.systemui.statusbar.policy.DevicePostureController.DEVICE_POSTURE_HALF_OPENED
+import com.android.systemui.statusbar.policy.DevicePostureController.DEVICE_POSTURE_OPENED
+import com.android.systemui.statusbar.policy.DevicePostureController.DEVICE_POSTURE_UNKNOWN
+import com.android.systemui.statusbar.policy.DevicePostureController.SUPPORTED_POSTURES_SIZE
+import com.android.systemui.util.concurrency.FakeExecutor
+import com.android.systemui.util.mockito.eq
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentCaptor
+import org.mockito.Captor
+import org.mockito.Mock
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+@TestableLooper.RunWithLooper(setAsMainLooper = true)
+class DevicePostureControllerImplTest : SysuiTestCase() {
+    private val useBaseStateDeviceState = SUPPORTED_POSTURES_SIZE
+    private val deviceStateToPostureMapping =
+        arrayOf(
+            "$DEVICE_POSTURE_UNKNOWN:$DEVICE_POSTURE_UNKNOWN",
+            "$DEVICE_POSTURE_CLOSED:$DEVICE_POSTURE_CLOSED",
+            "$DEVICE_POSTURE_HALF_OPENED:$DEVICE_POSTURE_HALF_OPENED",
+            "$DEVICE_POSTURE_OPENED:$DEVICE_POSTURE_OPENED",
+            "$DEVICE_POSTURE_FLIPPED:$DEVICE_POSTURE_FLIPPED",
+            "$useBaseStateDeviceState:1000"
+        )
+    @Mock private lateinit var deviceStateManager: DeviceStateManager
+    @Captor
+    private lateinit var deviceStateCallback: ArgumentCaptor<DeviceStateManager.DeviceStateCallback>
+
+    private lateinit var mainExecutor: FakeExecutor
+    private lateinit var testableResources: TestableResources
+    private lateinit var underTest: DevicePostureControllerImpl
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        mainExecutor = FakeExecutor(FakeSystemClock())
+        testableResources = context.getOrCreateTestableResources()
+        testableResources.addOverride(
+            com.android.internal.R.array.config_device_state_postures,
+            deviceStateToPostureMapping
+        )
+        underTest =
+            DevicePostureControllerImpl(
+                context,
+                deviceStateManager,
+                mainExecutor,
+            )
+        verifyRegistersForDeviceStateCallback()
+    }
+
+    @Test
+    fun testPostureChanged_updates() {
+        var posture = -1
+        underTest.addCallback { posture = it }
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_UNKNOWN)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_UNKNOWN)
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_CLOSED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_CLOSED)
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_HALF_OPENED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_HALF_OPENED)
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_OPENED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_OPENED)
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_FLIPPED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_FLIPPED)
+    }
+
+    @Test
+    fun testPostureChanged_useBaseUpdate() {
+        var posture = -1
+        underTest.addCallback { posture = it }
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_HALF_OPENED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_HALF_OPENED)
+
+        // base state change doesn't change the posture
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_CLOSED)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_HALF_OPENED)
+
+        // WHEN the display state maps to using the base state, then posture updates
+        deviceStateCallback.value.onStateChanged(useBaseStateDeviceState)
+        assertThat(posture).isEqualTo(DEVICE_POSTURE_CLOSED)
+    }
+
+    @Test
+    fun baseStateChanges_doesNotUpdatePosture() {
+        var numPostureChanges = 0
+        underTest.addCallback { numPostureChanges++ }
+
+        deviceStateCallback.value.onStateChanged(DEVICE_POSTURE_HALF_OPENED)
+        assertThat(numPostureChanges).isEqualTo(1)
+
+        // base state changes doesn't send another posture update since the device state isn't
+        // useBaseStateDeviceState
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_CLOSED)
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_HALF_OPENED)
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_FLIPPED)
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_OPENED)
+        deviceStateCallback.value.onBaseStateChanged(DEVICE_POSTURE_UNKNOWN)
+        assertThat(numPostureChanges).isEqualTo(1)
+    }
+
+    private fun verifyRegistersForDeviceStateCallback() {
+        verify(deviceStateManager).registerCallback(eq(mainExecutor), deviceStateCallback.capture())
+    }
+}