Don't convert task windowing mode while recents is running

A task can be in running state when recents is open.
This causes issues for desktop state tracking. It relies on freeform
tasks being visible and running to determine if we are on desktop.
While recents is open, do not process handleRequest calls.
Otherwise we would process any task launches as launches on desktop and
try to convert the windowing mode accordingly.

Bug: 297590571
Test: atest DesktopTasksControllerTest

Change-Id: I5d4bd89e36980994f9877eea22c936d6d0667cfc
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java b/libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java
index 9f9854e..e11f909 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/dagger/WMShellModule.java
@@ -492,13 +492,14 @@
             ToggleResizeDesktopTaskTransitionHandler toggleResizeDesktopTaskTransitionHandler,
             @DynamicOverride DesktopModeTaskRepository desktopModeTaskRepository,
             LaunchAdjacentController launchAdjacentController,
+            RecentsTransitionHandler recentsTransitionHandler,
             @ShellMainThread ShellExecutor mainExecutor
     ) {
         return new DesktopTasksController(context, shellInit, shellCommandHandler, shellController,
                 displayController, shellTaskOrganizer, syncQueue, rootTaskDisplayAreaOrganizer,
                 transitions, enterDesktopTransitionHandler, exitDesktopTransitionHandler,
                 toggleResizeDesktopTaskTransitionHandler, desktopModeTaskRepository,
-                launchAdjacentController, mainExecutor);
+                launchAdjacentController, recentsTransitionHandler, mainExecutor);
     }
 
     @WMSingleton
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
index 09ba4f7..412a5b5 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
@@ -60,6 +60,8 @@
 import com.android.wm.shell.desktopmode.DesktopModeTaskRepository.VisibleTasksListener
 import com.android.wm.shell.desktopmode.DesktopModeVisualIndicator.TO_DESKTOP_INDICATOR
 import com.android.wm.shell.protolog.ShellProtoLogGroup.WM_SHELL_DESKTOP_MODE
+import com.android.wm.shell.recents.RecentsTransitionHandler
+import com.android.wm.shell.recents.RecentsTransitionStateListener
 import com.android.wm.shell.splitscreen.SplitScreenController
 import com.android.wm.shell.splitscreen.SplitScreenController.EXIT_REASON_ENTER_DESKTOP
 import com.android.wm.shell.sysui.ShellCommandHandler
@@ -68,7 +70,6 @@
 import com.android.wm.shell.sysui.ShellSharedConstants
 import com.android.wm.shell.transition.OneShotRemoteHandler
 import com.android.wm.shell.transition.Transitions
-import com.android.wm.shell.transition.Transitions.TransitionHandler
 import com.android.wm.shell.util.KtProtoLog
 import com.android.wm.shell.windowdecor.DesktopModeWindowDecoration
 import com.android.wm.shell.windowdecor.MoveToDesktopAnimator
@@ -93,6 +94,7 @@
         ToggleResizeDesktopTaskTransitionHandler,
         private val desktopModeTaskRepository: DesktopModeTaskRepository,
         private val launchAdjacentController: LaunchAdjacentController,
+        private val recentsTransitionHandler: RecentsTransitionHandler,
         @ShellMainThread private val mainExecutor: ShellExecutor
 ) : RemoteCallable<DesktopTasksController>, Transitions.TransitionHandler {
 
@@ -119,6 +121,8 @@
             com.android.wm.shell.R.dimen.desktop_mode_transition_area_width
         )
 
+    private var recentsAnimationRunning = false
+
     // This is public to avoid cyclic dependency; it is set by SplitScreenController
     lateinit var splitScreenController: SplitScreenController
 
@@ -139,6 +143,19 @@
         )
         transitions.addHandler(this)
         desktopModeTaskRepository.addVisibleTasksListener(taskVisibilityListener, mainExecutor)
+
+        recentsTransitionHandler.addTransitionStateListener(
+            object : RecentsTransitionStateListener {
+                override fun onAnimationStateChanged(running: Boolean) {
+                    KtProtoLog.v(
+                        WM_SHELL_DESKTOP_MODE,
+                        "DesktopTasksController: recents animation state changed running=%b",
+                        running
+                    )
+                    recentsAnimationRunning = running
+                }
+            }
+        )
     }
 
     /** Show all tasks, that are part of the desktop, on top of launcher */
@@ -644,6 +661,10 @@
         val triggerTask = request.triggerTask
         val shouldHandleRequest =
             when {
+                recentsAnimationRunning -> {
+                    reason = "recents animation is running"
+                    false
+                }
                 // Only handle open or to front transitions
                 request.type != TRANSIT_OPEN && request.type != TRANSIT_TO_FRONT -> {
                     reason = "transition type not handled (${request.type})"
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt
index dea1617..ebcb640 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/desktopmode/DesktopTasksControllerTest.kt
@@ -54,6 +54,8 @@
 import com.android.wm.shell.desktopmode.DesktopTestHelpers.Companion.createFullscreenTask
 import com.android.wm.shell.desktopmode.DesktopTestHelpers.Companion.createHomeTask
 import com.android.wm.shell.desktopmode.DesktopTestHelpers.Companion.createSplitScreenTask
+import com.android.wm.shell.recents.RecentsTransitionHandler
+import com.android.wm.shell.recents.RecentsTransitionStateListener
 import com.android.wm.shell.splitscreen.SplitScreenController
 import com.android.wm.shell.sysui.ShellCommandHandler
 import com.android.wm.shell.sysui.ShellController
@@ -101,11 +103,13 @@
     @Mock lateinit var launchAdjacentController: LaunchAdjacentController
     @Mock lateinit var desktopModeWindowDecoration: DesktopModeWindowDecoration
     @Mock lateinit var splitScreenController: SplitScreenController
+    @Mock lateinit var recentsTransitionHandler: RecentsTransitionHandler
 
     private lateinit var mockitoSession: StaticMockitoSession
     private lateinit var controller: DesktopTasksController
     private lateinit var shellInit: ShellInit
     private lateinit var desktopModeTaskRepository: DesktopModeTaskRepository
+    private lateinit var recentsTransitionStateListener: RecentsTransitionStateListener
 
     private val shellExecutor = TestShellExecutor()
     // Mock running tasks are registered here so we can get the list from mock shell task organizer
@@ -126,6 +130,10 @@
         controller.splitScreenController = splitScreenController
 
         shellInit.init()
+
+        val captor = ArgumentCaptor.forClass(RecentsTransitionStateListener::class.java)
+        verify(recentsTransitionHandler).addTransitionStateListener(captor.capture())
+        recentsTransitionStateListener = captor.value
     }
 
     private fun createController(): DesktopTasksController {
@@ -144,6 +152,7 @@
             mToggleResizeDesktopTaskTransitionHandler,
             desktopModeTaskRepository,
             launchAdjacentController,
+            recentsTransitionHandler,
             shellExecutor
         )
     }
@@ -355,7 +364,7 @@
 
     @Test
     fun moveToDesktop_splitTaskExitsSplit() {
-        var task = setUpSplitScreenTask()
+        val task = setUpSplitScreenTask()
         controller.moveToDesktop(desktopModeWindowDecoration, task)
         val wct = getLatestMoveToDesktopWct()
         assertThat(wct.changes[task.token.asBinder()]?.windowingMode)
@@ -367,7 +376,7 @@
 
     @Test
     fun moveToDesktop_fullscreenTaskDoesNotExitSplit() {
-        var task = setUpFullscreenTask()
+        val task = setUpFullscreenTask()
         controller.moveToDesktop(desktopModeWindowDecoration, task)
         val wct = getLatestMoveToDesktopWct()
         assertThat(wct.changes[task.token.asBinder()]?.windowingMode)
@@ -666,6 +675,20 @@
     }
 
     @Test
+    fun handleRequest_recentsAnimationRunning_returnNull() {
+        // Set up a visible freeform task so a fullscreen task should be converted to freeform
+        val freeformTask = setUpFreeformTask()
+        markTaskVisible(freeformTask)
+
+        // Mark recents animation running
+        recentsTransitionStateListener.onAnimationStateChanged(true)
+
+        // Open a fullscreen task, check that it does not result in a WCT with changes to it
+        val fullscreenTask = createFullscreenTask()
+        assertThat(controller.handleRequest(Binder(), createTransition(fullscreenTask))).isNull()
+    }
+
+    @Test
     fun stashDesktopApps_stateUpdates() {
         whenever(DesktopModeStatus.isStashingEnabled()).thenReturn(true)