Create controller for desktop prototype 2

Create the controller class, set up dagger.
Ensure controller is not initialized when flag is off.

Bug: 260645044
Test: atest DesktopTasksControllerTest
Change-Id: I0435e07a22e379f403ae5d1b23f39a67a12e8a6d

libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellBaseModule.java

@@ -61,6 +61,7 @@ import com.android.wm.shell.desktopmode.DesktopMode;
 import com.android.wm.shell.desktopmode.DesktopModeController;
 import com.android.wm.shell.desktopmode.DesktopModeStatus;
 import com.android.wm.shell.desktopmode.DesktopModeTaskRepository;
+import com.android.wm.shell.desktopmode.DesktopTasksController;
 import com.android.wm.shell.displayareahelper.DisplayAreaHelper;
 import com.android.wm.shell.displayareahelper.DisplayAreaHelperController;
 import com.android.wm.shell.draganddrop.DragAndDropController;
@@ -677,7 +678,11 @@ public abstract class WMShellBaseModule {
     @WMSingleton
     @Provides
     static Optional<DesktopMode> provideDesktopMode(
-            Optional<DesktopModeController> desktopModeController) {
+            Optional<DesktopModeController> desktopModeController,
+            Optional<DesktopTasksController> desktopTasksController) {
+        if (DesktopModeStatus.isProto2Enabled()) {
+            return desktopTasksController.map(DesktopTasksController::asDesktopMode);
+        }
         return desktopModeController.map(DesktopModeController::asDesktopMode);
     }
 
@@ -698,6 +703,23 @@ public abstract class WMShellBaseModule {
         return Optional.empty();
     }
 
+    @BindsOptionalOf
+    @DynamicOverride
+    abstract DesktopTasksController optionalDesktopTasksController();
+
+    @WMSingleton
+    @Provides
+    static Optional<DesktopTasksController> providesDesktopTasksController(
+            @DynamicOverride Optional<Lazy<DesktopTasksController>> desktopTasksController) {
+        // Use optional-of-lazy for the dependency that this provider relies on.
+        // Lazy ensures that this provider will not be the cause the dependency is created
+        // when it will not be returned due to the condition below.
+        if (DesktopModeStatus.isProto2Enabled()) {
+            return desktopTasksController.map(Lazy::get);
+        }
+        return Optional.empty();
+    }
+
     @BindsOptionalOf
     @DynamicOverride
     abstract DesktopModeTaskRepository optionalDesktopModeTaskRepository();

libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java

@@ -50,6 +50,7 @@ import com.android.wm.shell.common.annotations.ShellBackgroundThread;
 import com.android.wm.shell.common.annotations.ShellMainThread;
 import com.android.wm.shell.desktopmode.DesktopModeController;
 import com.android.wm.shell.desktopmode.DesktopModeTaskRepository;
+import com.android.wm.shell.desktopmode.DesktopTasksController;
 import com.android.wm.shell.draganddrop.DragAndDropController;
 import com.android.wm.shell.freeform.FreeformComponents;
 import com.android.wm.shell.freeform.FreeformTaskListener;
@@ -613,6 +614,22 @@ public abstract class WMShellModule {
                 mainExecutor);
     }
 
+    @WMSingleton
+    @Provides
+    @DynamicOverride
+    static DesktopTasksController provideDesktopTasksController(
+            Context context,
+            ShellInit shellInit,
+            ShellController shellController,
+            ShellTaskOrganizer shellTaskOrganizer,
+            Transitions transitions,
+            @DynamicOverride DesktopModeTaskRepository desktopModeTaskRepository,
+            @ShellMainThread ShellExecutor mainExecutor
+    ) {
+        return new DesktopTasksController(context, shellInit, shellController, shellTaskOrganizer,
+                transitions, desktopModeTaskRepository, mainExecutor);
+    }
+
     @WMSingleton
     @Provides
     @DynamicOverride

libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopModeStatus.java

@@ -70,9 +70,13 @@ public class DesktopModeStatus {
      * @return {@code true} if active
      */
     public static boolean isActive(Context context) {
-        if (!IS_SUPPORTED) {
+        if (!isAnyEnabled()) {
             return false;
         }
+        if (isProto2Enabled()) {
+            // Desktop mode is always active in prototype 2
+            return true;
+        }
         try {
             int result = Settings.System.getIntForUser(context.getContentResolver(),
                     Settings.System.DESKTOP_MODE, UserHandle.USER_CURRENT);

libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt

@@ -0,0 +1,116 @@
+/*
+ * 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.wm.shell.desktopmode
+
+import android.content.Context
+import androidx.annotation.BinderThread
+import com.android.internal.protolog.common.ProtoLog
+import com.android.wm.shell.ShellTaskOrganizer
+import com.android.wm.shell.common.ExternalInterfaceBinder
+import com.android.wm.shell.common.RemoteCallable
+import com.android.wm.shell.common.ShellExecutor
+import com.android.wm.shell.common.annotations.ExternalThread
+import com.android.wm.shell.common.annotations.ShellMainThread
+import com.android.wm.shell.desktopmode.DesktopModeTaskRepository.VisibleTasksListener
+import com.android.wm.shell.protolog.ShellProtoLogGroup.WM_SHELL_DESKTOP_MODE
+import com.android.wm.shell.sysui.ShellController
+import com.android.wm.shell.sysui.ShellInit
+import com.android.wm.shell.sysui.ShellSharedConstants
+import com.android.wm.shell.transition.Transitions
+import java.util.concurrent.Executor
+
+/** Handles moving tasks in and out of desktop */
+class DesktopTasksController(
+    private val context: Context,
+    shellInit: ShellInit,
+    private val shellController: ShellController,
+    private val shellTaskOrganizer: ShellTaskOrganizer,
+    private val transitions: Transitions,
+    private val desktopModeTaskRepository: DesktopModeTaskRepository,
+    @ShellMainThread private val mainExecutor: ShellExecutor
+) : RemoteCallable<DesktopTasksController> {
+
+    private val desktopMode: DesktopModeImpl
+
+    init {
+        desktopMode = DesktopModeImpl()
+        if (DesktopModeStatus.isProto2Enabled()) {
+            shellInit.addInitCallback({ onInit() }, this)
+        }
+    }
+
+    private fun onInit() {
+        ProtoLog.d(WM_SHELL_DESKTOP_MODE, "Initialize DesktopTasksController")
+        shellController.addExternalInterface(
+            ShellSharedConstants.KEY_EXTRA_SHELL_DESKTOP_MODE,
+            { createExternalInterface() },
+            this
+        )
+    }
+
+    override fun getContext(): Context {
+        return context
+    }
+
+    override fun getRemoteCallExecutor(): ShellExecutor {
+        return mainExecutor
+    }
+
+    /** Creates a new instance of the external interface to pass to another process. */
+    private fun createExternalInterface(): ExternalInterfaceBinder {
+        return IDesktopModeImpl(this)
+    }
+
+    /** Get connection interface between sysui and shell */
+    fun asDesktopMode(): DesktopMode {
+        return desktopMode
+    }
+
+    /**
+     * Adds a listener to find out about changes in the visibility of freeform tasks.
+     *
+     * @param listener the listener to add.
+     * @param callbackExecutor the executor to call the listener on.
+     */
+    fun addListener(listener: VisibleTasksListener, callbackExecutor: Executor) {
+        desktopModeTaskRepository.addVisibleTasksListener(listener, callbackExecutor)
+    }
+
+    /** The interface for calls from outside the shell, within the host process. */
+    @ExternalThread
+    private inner class DesktopModeImpl : DesktopMode {
+        override fun addListener(listener: VisibleTasksListener, callbackExecutor: Executor) {
+            mainExecutor.execute {
+                this@DesktopTasksController.addListener(listener, callbackExecutor)
+            }
+        }
+    }
+
+    /** The interface for calls from outside the host process. */
+    @BinderThread
+    private class IDesktopModeImpl(private var controller: DesktopTasksController?) :
+        IDesktopMode.Stub(), ExternalInterfaceBinder {
+        /** Invalidates this instance, preventing future calls from updating the controller. */
+        override fun invalidate() {
+            controller = null
+        }
+
+        override fun showDesktopApps() {
+            // TODO
+        }
+    }
+}

libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt

@@ -0,0 +1,98 @@
+/*
+ * 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.wm.shell.desktopmode
+
+import android.testing.AndroidTestingRunner
+import androidx.test.filters.SmallTest
+import com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession
+import com.android.dx.mockito.inline.extended.ExtendedMockito.never
+import com.android.dx.mockito.inline.extended.StaticMockitoSession
+import com.android.wm.shell.ShellTaskOrganizer
+import com.android.wm.shell.ShellTestCase
+import com.android.wm.shell.TestShellExecutor
+import com.android.wm.shell.common.ShellExecutor
+import com.android.wm.shell.sysui.ShellController
+import com.android.wm.shell.sysui.ShellInit
+import com.android.wm.shell.transition.Transitions
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.Mockito
+import org.mockito.Mockito.any
+import org.mockito.Mockito.clearInvocations
+import org.mockito.Mockito.verify
+import org.mockito.Mockito.`when` as whenever
+
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class DesktopTasksControllerTest : ShellTestCase() {
+
+    @Mock
+    lateinit var testExecutor: ShellExecutor
+    @Mock
+    lateinit var shellController: ShellController
+    @Mock
+    lateinit var shellTaskOrganizer: ShellTaskOrganizer
+    @Mock
+    lateinit var transitions: Transitions
+
+    lateinit var mockitoSession: StaticMockitoSession
+    lateinit var controller: DesktopTasksController
+    lateinit var shellInit: ShellInit
+    lateinit var desktopModeTaskRepository: DesktopModeTaskRepository
+
+    @Before
+    fun setUp() {
+        mockitoSession = mockitoSession().mockStatic(DesktopModeStatus::class.java).startMocking()
+        whenever(DesktopModeStatus.isProto2Enabled()).thenReturn(true)
+
+        shellInit = Mockito.spy(ShellInit(testExecutor))
+        desktopModeTaskRepository = DesktopModeTaskRepository()
+
+        controller = createController()
+
+        shellInit.init()
+    }
+
+    private fun createController(): DesktopTasksController {
+        return DesktopTasksController(context, shellInit, shellController,
+                shellTaskOrganizer, transitions, desktopModeTaskRepository, TestShellExecutor())
+    }
+
+    @After
+    fun tearDown() {
+        mockitoSession.finishMocking()
+    }
+
+    @Test
+    fun instantiate_addInitCallback() {
+        verify(shellInit).addInitCallback(any(), any<DesktopTasksController>())
+    }
+
+    @Test
+    fun instantiate_flagOff_doNotAddInitCallback() {
+        whenever(DesktopModeStatus.isProto2Enabled()).thenReturn(false)
+        clearInvocations(shellInit)
+
+        createController()
+
+        verify(shellInit, never()).addInitCallback(any(), any<DesktopTasksController>())
+    }
+}