[YAAP][eleven] FODCircleView: Don't show on top of assistant UI

* register a task stack change listener to hide fod when assistant is visibile in lockscreen
* aosp implementation does not take fod into account so we have to register our own listeners

idoybh: taken from AOSP-Krypton/frameworks_base@b9c454a
        and stripped down what we need.
        Ignore assistant UI when showing bouncer & Fix NPE

Change-Id: I4b4927704fcb179826d914e529f9c43748464d9f

1 files changed, 50 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java b/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
index 10b304bb8434..e041fcac5f6b 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
@@ -16,6 +16,11 @@
 
 package com.android.systemui.biometrics;
 
+import static android.app.WindowConfiguration.ACTIVITY_TYPE_ASSISTANT;
+import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;
+
+import android.app.ActivityManager.StackInfo;
+import android.app.ActivityTaskManager;
 import android.app.admin.DevicePolicyManager;
 import android.content.Context;
 import android.content.res.Configuration;
@@ -45,6 +50,8 @@ import com.android.keyguard.KeyguardUpdateMonitor;
 import com.android.keyguard.KeyguardUpdateMonitorCallback;
 import com.android.systemui.Dependency;
 import com.android.systemui.R;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.TaskStackChangeListener;
 
 import vendor.lineage.biometrics.fingerprint.inscreen.V1_0.IFingerprintInscreen;
 import vendor.lineage.biometrics.fingerprint.inscreen.V1_0.IFingerprintInscreenCallback;
@@ -74,6 +81,7 @@ public class FODCircleView extends ImageView {
     private int mDreamingOffsetY;
 
     private boolean mFading;
+    private boolean mIsAssistantVisible = false;
     private boolean mIsBouncer;
     private boolean mIsBiometricRunning;
     private boolean mIsCircleShowing;
@@ -158,6 +166,7 @@ public class FODCircleView extends ImageView {
             mIsBouncer = isBouncer;
             if (mUpdateMonitor.isFingerprintDetectionRunning()) {
                 if (isPinOrPattern(mUpdateMonitor.getCurrentUser()) || !isBouncer) {
+                    mIsAssistantVisible = false;
                     show();
                 } else {
                     hide();
@@ -187,6 +196,28 @@ public class FODCircleView extends ImageView {
         }
     };
 
+    private final TaskStackChangeListener
+            mTaskStackChangeListener = new TaskStackChangeListener() {
+        @Override
+        public void onTaskStackChangedBackground() {
+            try {
+                StackInfo stackInfo = ActivityTaskManager.getService().getStackInfo(
+                        WINDOWING_MODE_UNDEFINED, ACTIVITY_TYPE_ASSISTANT);
+                if (stackInfo == null && mIsAssistantVisible) {
+                        mIsAssistantVisible = false;
+                        if (mUpdateMonitor.isFingerprintDetectionRunning()) {
+                            mHandler.post(() -> show());
+                    }
+                    return;
+                }
+                if (stackInfo != null) mIsAssistantVisible = stackInfo.visible;
+                if (mIsAssistantVisible) {
+                    mHandler.post(() -> hide());
+                }
+            } catch (RemoteException ignored) { }
+        }
+    };
+
     public FODCircleView(Context context) {
         super(context);
 
@@ -263,6 +294,20 @@ public class FODCircleView extends ImageView {
     }
 
     @Override
+    protected void onAttachedToWindow() {
+        ActivityManagerWrapper.getInstance().registerTaskStackListener(
+                mTaskStackChangeListener);
+        super.onAttachedToWindow();
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        ActivityManagerWrapper.getInstance().unregisterTaskStackListener(
+                mTaskStackChangeListener);
+        super.onDetachedFromWindow();
+    }
+
+    @Override
     protected void onDraw(Canvas canvas) {
         if (!mIsCircleShowing) {
             canvas.drawCircle(mSize / 2, mSize / 2, mSize / 2.0f, mPaintFingerprintBackground);
@@ -400,6 +445,11 @@ public class FODCircleView extends ImageView {
             return;
         }
 
+        if (mIsAssistantVisible) {
+            // Don't show when assistant UI is visible
+            return;
+        }
+
         updatePosition();
 
         setVisibility(View.VISIBLE);