0001-FODCircleView-change-window-type-based-on-foreground.patch

From bc68ef6273307143a78788c068af1adde6fbc9d3 Mon Sep 17 00:00:00 2001
From: Dil3mm4 <[email protected]>
Date: Mon, 30 Nov 2020 16:38:58 +0000
Subject: [PATCH] FODCircleView: change window type based on foreground status

To avoid clashes with other UI elements once a third party app (or Settings) request biometric unlocks, we need to change the window type accordingly.

Tests:
    - open third party app that requests biometric (or Settings enrollment fragment), expand qs, observe FOD is in background

diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java b/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
index bee67dea7c33..726bd13273ab 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/FODCircleView.java
@@ -187,6 +187,7 @@ public class FODCircleView extends ImageView {
                 show();
             }
         }
+
     };
 
     public FODCircleView(Context context) {
@@ -264,6 +265,26 @@ public class FODCircleView extends ImageView {
         mUpdateMonitor.registerCallback(mMonitorCallback);
     }
 
+    public void changeWindowType(boolean isKeyguard) {
+        // we want to change window type only if it doesn't match what we excpect else we return
+
+        if (isKeyguard && mParams.type ==  WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG) return;
+        if (!isKeyguard && mParams.type == WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG) return;
+
+        mWindowManager.removeView(this);
+        mParams.type = !isKeyguard ? WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG : WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG;
+        mParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
+                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
+        mParams.gravity = Gravity.TOP | Gravity.LEFT;
+
+        mPressedParams.copyFrom(mParams);
+        mPressedParams.flags |= WindowManager.LayoutParams.FLAG_DIM_BEHIND | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
+
+        mParams.setTitle("Fingerprint on display");
+        mPressedParams.setTitle("Fingerprint on display.touched");
+        mWindowManager.addView(this, mParams);
+    }
+
     @Override
     protected void onDraw(Canvas canvas) {
         if (!mIsCircleShowing) {
@@ -404,11 +425,13 @@ public class FODCircleView extends ImageView {
         if (mIsKeyguard && !mIsBiometricRunning) {
             return;
         }
-
         updatePosition();
-
         setVisibility(View.VISIBLE);
-        animate().withStartAction(() -> mFading = true)
+        animate()
+                .withStartAction(() -> {
+                    mFading = true;
+                    changeWindowType(mIsKeyguard || mIsDreaming ? true : false);
+                })
                 .alpha(mIsDreaming ? 0.5f : 1.0f)
                 .setDuration(FADE_ANIM_DURATION)
                 .withEndAction(() -> mFading = false)
@@ -423,6 +446,8 @@ public class FODCircleView extends ImageView {
                 .withEndAction(() -> {
                     setVisibility(View.GONE);
                     mFading = false;
+                    if (mIsKeyguard)
+                        changeWindowType(true);
                 })
                 .start();
         hideCircle();
-- 
2.20.1