Focus the first task in KQS when it is not currently running

Flag: LEGACY ENABLE_KEYBOARD_QUICK_SWITCH ENABLED
Fixes: 316004088
Test: TaplTestsKeyboardQuickSwitch
Change-Id: I8a91ca0dd32c6fc2352d285934a2c4f79ba1bb13
diff --git a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java
index f58fd45..5caf004 100644
--- a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchController.java
@@ -32,6 +32,7 @@
 import com.android.quickstep.util.GroupTask;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.ThumbnailData;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
 
 import java.io.PrintWriter;
 import java.util.ArrayList;
@@ -115,8 +116,15 @@
                         && desktopController.areFreeformTasksVisible();
 
         if (mModel.isTaskListValid(mTaskListChangeId)) {
-            mQuickSwitchViewController.openQuickSwitchView(mTasks,
-                    mNumHiddenTasks, /* updateTasks= */ false, currentFocusedIndex, onDesktop);
+            // When we are opening the KQS with no focus override, check if the first task is
+            // running. If not, focus that first task.
+            mQuickSwitchViewController.openQuickSwitchView(
+                    mTasks,
+                    mNumHiddenTasks,
+                    /* updateTasks= */ false,
+                    currentFocusedIndex == -1 && !mControllerCallbacks.isFirstTaskRunning()
+                            ? 0 : currentFocusedIndex,
+                    onDesktop);
             return;
         }
 
@@ -126,8 +134,15 @@
             } else {
                 processLoadedTasks(tasks);
             }
-            mQuickSwitchViewController.openQuickSwitchView(mTasks,
-                    mNumHiddenTasks, /* updateTasks= */ true, currentFocusedIndex, onDesktop);
+            // Check if the first task is running after the recents model has updated so that we use
+            // the correct index.
+            mQuickSwitchViewController.openQuickSwitchView(
+                    mTasks,
+                    mNumHiddenTasks,
+                    /* updateTasks= */ true,
+                    currentFocusedIndex == -1 && !mControllerCallbacks.isFirstTaskRunning()
+                            ? 0 : currentFocusedIndex,
+                    onDesktop);
         });
     }
 
@@ -246,5 +261,20 @@
         void onCloseComplete() {
             mQuickSwitchViewController = null;
         }
+
+        boolean isTaskRunning(@Nullable GroupTask task) {
+            if (task == null) {
+                return false;
+            }
+            int runningTaskId = ActivityManagerWrapper.getInstance().getRunningTask().taskId;
+            Task task2 = task.task2;
+
+            return runningTaskId == task.task1.key.id
+                    || (task2 != null && runningTaskId == task2.key.id);
+        }
+
+        boolean isFirstTaskRunning() {
+            return isTaskRunning(getTaskAt(0));
+        }
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchViewController.java b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchViewController.java
index b29ce6b..6e88780 100644
--- a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchViewController.java
@@ -117,9 +117,12 @@
      * index will be focused.
      */
     protected int launchFocusedTask() {
-        // Launch the second-most recent task if the user quick switches too quickly, if possible.
-        return launchTaskAt(mCurrentFocusIndex == -1
-                ? (mControllerCallbacks.getTaskCount() > 1 ? 1 : 0) : mCurrentFocusIndex);
+        if (mCurrentFocusIndex != -1) {
+            return launchTaskAt(mCurrentFocusIndex);
+        }
+        // If the user quick switches too quickly, updateCurrentFocusIndex might not have run.
+        return launchTaskAt(mControllerCallbacks.isFirstTaskRunning()
+                && mControllerCallbacks.getTaskCount() > 1 ? 1 : 0);
     }
 
     private int launchTaskAt(int index) {
@@ -134,10 +137,7 @@
         if (task == null) {
             return Math.max(0, index);
         }
-        Task task2 = task.task2;
-        int runningTaskId = ActivityManagerWrapper.getInstance().getRunningTask().taskId;
-        if (runningTaskId == task.task1.key.id
-                || (task2 != null && runningTaskId == task2.key.id)) {
+        if (mControllerCallbacks.isTaskRunning(task)) {
             // Ignore attempts to run the selected task if it is already running.
             return -1;
         }
@@ -146,7 +146,7 @@
             UI_HELPER_EXECUTOR.execute(() ->
                     SystemUiProxy.INSTANCE.get(mKeyboardQuickSwitchView.getContext())
                             .showDesktopApp(task.task1.key.id));
-        } else if (task2 == null) {
+        } else if (task.task2 == null) {
             UI_HELPER_EXECUTOR.execute(() ->
                     ActivityManagerWrapper.getInstance().startActivityFromRecents(
                             task.task1.key,
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsKeyboardQuickSwitch.java b/quickstep/tests/src/com/android/quickstep/TaplTestsKeyboardQuickSwitch.java
index 829e54b..7191f70 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsKeyboardQuickSwitch.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsKeyboardQuickSwitch.java
@@ -33,7 +33,16 @@
 public class TaplTestsKeyboardQuickSwitch extends AbstractQuickStepTest {
 
     private enum TestSurface {
-        HOME, LAUNCHED_APP, HOME_ALL_APPS, WIDGETS,
+        HOME(true),
+        LAUNCHED_APP(false),
+        HOME_ALL_APPS(true),
+        WIDGETS(true);
+
+        private final boolean mInitialFocusAtZero;
+
+        TestSurface(boolean initialFocusAtZero) {
+            mInitialFocusAtZero = initialFocusAtZero;
+        }
     }
 
     private enum TestCase {
@@ -172,13 +181,22 @@
                 kqs.dismiss();
                 break;
             case LAUNCH_LAST_APP:
-                kqs.launchFocusedAppTask(CALCULATOR_APP_PACKAGE);
+                kqs.launchFocusedAppTask(testSurface.mInitialFocusAtZero
+                        ? getAppPackageName() : CALCULATOR_APP_PACKAGE);
                 break;
             case LAUNCH_SELECTED_APP:
-                kqs.moveFocusForward().launchFocusedAppTask(CALCULATOR_APP_PACKAGE);
+                kqs.moveFocusForward();
+                if (testSurface.mInitialFocusAtZero) {
+                    kqs.moveFocusForward();
+                }
+                kqs.launchFocusedAppTask(CALCULATOR_APP_PACKAGE);
                 break;
             case LAUNCH_OVERVIEW:
-                kqs.moveFocusBackward().moveFocusBackward().launchFocusedOverviewTask();
+                kqs.moveFocusBackward();
+                if (!testSurface.mInitialFocusAtZero) {
+                    kqs.moveFocusBackward();
+                }
+                kqs.launchFocusedOverviewTask();
                 break;
             default:
                 throw new IllegalStateException("Cannot run test case: " + testCase);