From 436b9939e3be19b6259f8fd44e93eb00d1154d7d Mon Sep 17 00:00:00 2001
From: Johannes Gallmann <gallmann@google.com>
Date: Wed, 3 Jan 2024 16:45:16 +0100
Subject: [PATCH] Hide app icon during predictive back to home

Bug: 311337169
Flag: ACONFIG com.android.systemui.predictive_back_qs_dialog_anim DEVELOPMENT
Test: Manual, i.e. testing predictive back to home on device and verifying visually that app icon behaves correctly
Change-Id: I91491d91d004d81f4abc67c361c8824eba8dfdcd
---
 .../launcher3/QuickstepTransitionManager.java  |  2 +-
 .../LauncherBackAnimationController.java       | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index f25b652d0c..2ebbe6f79e 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -1290,7 +1290,7 @@ public class QuickstepTransitionManager implements OnDeviceProfileChangeListener
     /**
      * Returns view on launcher that corresponds to the closing app in the list of app targets
      */
-    private @Nullable View findLauncherView(RemoteAnimationTarget[] appTargets) {
+    public @Nullable View findLauncherView(RemoteAnimationTarget[] appTargets) {
         for (RemoteAnimationTarget appTarget : appTargets) {
             if (appTarget.mode == MODE_CLOSING) {
                 View launcherView = findLauncherView(appTarget);
diff --git a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
index 0f88aac4fc..b9029ea9f8 100644
--- a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
+++ b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
@@ -54,12 +54,14 @@ import android.window.IOnBackInvokedCallback;
 
 import com.android.internal.view.AppearanceRegion;
 import com.android.launcher3.AbstractFloatingView;
+import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.LauncherPrefs;
 import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.taskbar.LauncherTaskbarUIController;
 import com.android.launcher3.uioverrides.QuickstepLauncher;
+import com.android.launcher3.widget.LauncherAppWidgetHostView;
 import com.android.quickstep.util.RectFSpringAnim;
 import com.android.systemui.shared.system.QuickStepContract;
 
@@ -108,6 +110,7 @@ public class LauncherBackAnimationController {
     private final PointF mInitialTouchPos = new PointF();
 
     private RemoteAnimationTarget mBackTarget;
+    private View mLauncherTargetView;
     private SurfaceControl.Transaction mTransaction = new SurfaceControl.Transaction();
     private boolean mSpringAnimationInProgress = false;
     private boolean mAnimatorSetInProgress = false;
@@ -303,11 +306,22 @@ public class LauncherBackAnimationController {
             int insetBottom = mStartRect.bottom - appTarget.contentInsets.bottom;
             mStartRect.set(mStartRect.left, mStartRect.top, mStartRect.right, insetBottom);
         }
+        mLauncherTargetView = mQuickstepTransitionManager.findLauncherView(
+                new RemoteAnimationTarget[]{ mBackTarget });
+        setLauncherTargetViewVisible(false);
         mCurrentRect.set(mStartRect);
         addScrimLayer();
         mTransaction.apply();
     }
 
+    private void setLauncherTargetViewVisible(boolean isVisible) {
+        if (mLauncherTargetView instanceof BubbleTextView) {
+            ((BubbleTextView) mLauncherTargetView).setIconVisible(isVisible);
+        } else if (mLauncherTargetView instanceof LauncherAppWidgetHostView) {
+            mLauncherTargetView.setAlpha(isVisible ? 1f : 0f);
+        }
+    }
+
     void addScrimLayer() {
         ViewRootImpl viewRootImpl = mLauncher.getDragLayer().getViewRootImpl();
         SurfaceControl parent = viewRootImpl != null
@@ -436,6 +450,8 @@ public class LauncherBackAnimationController {
             mLauncher.getStateManager().moveToRestState();
         }
 
+        setLauncherTargetViewVisible(true);
+
         // Explicitly close opened floating views (which is typically called from
         // Launcher#onResumed, but in the predictive back flow launcher is not resumed until
         // the transition is fully finished.)
@@ -470,6 +486,8 @@ public class LauncherBackAnimationController {
         mInitialTouchPos.set(0, 0);
         mAnimatorSetInProgress = false;
         mSpringAnimationInProgress = false;
+        setLauncherTargetViewVisible(true);
+        mLauncherTargetView = null;
         // We don't call customizeStatusBarAppearance here to prevent the status bar update with
         // the legacy appearance. It should be refreshed after the transition done.
         mOverridingStatusBarFlags = false;