From b4f55ed7b55e12cdded38834f4872cc732af7e7e Mon Sep 17 00:00:00 2001
From: Matt Casey <mrcasey@google.com>
Date: Fri, 4 Mar 2022 15:04:58 -0500
Subject: [PATCH] Ignore all input outside of clipboard UI

Touches outside the UI should pass through but also dismiss the UI. This
can be done with insets in the draggable constraint layout (similar to
how ScreenshotView works).

Bug: 221509682
Test: manual test of bug repro.
Change-Id: I9fab0bff52e647cbeb8cb53a18a6603bb5c4195f
---
 .../DraggableConstraintLayout.java            | 35 +++++++++++++++----
 1 file changed, 29 insertions(+), 6 deletions(-)

diff --git a/packages/SystemUI/src/com/android/systemui/clipboardoverlay/DraggableConstraintLayout.java b/packages/SystemUI/src/com/android/systemui/clipboardoverlay/DraggableConstraintLayout.java
index a327809640db9..57dc1620a410e 100644
--- a/packages/SystemUI/src/com/android/systemui/clipboardoverlay/DraggableConstraintLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/clipboardoverlay/DraggableConstraintLayout.java
@@ -19,10 +19,12 @@ package com.android.systemui.clipboardoverlay;
 import android.animation.Animator;
 import android.content.Context;
 import android.graphics.Rect;
+import android.graphics.Region;
 import android.util.AttributeSet;
 import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.ViewTreeObserver;
 
 import androidx.constraintlayout.widget.ConstraintLayout;
 
@@ -34,7 +36,8 @@ import java.util.function.Consumer;
 /**
  * ConstraintLayout that is draggable when touched in a specific region
  */
-public class DraggableConstraintLayout extends ConstraintLayout {
+public class DraggableConstraintLayout extends ConstraintLayout
+        implements ViewTreeObserver.OnComputeInternalInsetsListener {
     private final SwipeDismissHandler mSwipeDismissHandler;
     private final GestureDetector mSwipeDetector;
     private Consumer<Animator> mOnDismissInitiated;
@@ -95,11 +98,6 @@ public class DraggableConstraintLayout extends ConstraintLayout {
         mSwipeDetector.setIsLongpressEnabled(false);
     }
 
-    @Override // View
-    protected void onFinishInflate() {
-
-    }
-
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
@@ -137,4 +135,29 @@ public class DraggableConstraintLayout extends ConstraintLayout {
     public void setOnInteractionCallback(Runnable callback) {
         mOnInteraction = callback;
     }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        getViewTreeObserver().addOnComputeInternalInsetsListener(this);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        getViewTreeObserver().removeOnComputeInternalInsetsListener(this);
+    }
+
+    @Override
+    public void onComputeInternalInsets(ViewTreeObserver.InternalInsetsInfo inoutInfo) {
+        // Only child views are touchable.
+        Region r = new Region();
+        Rect rect = new Rect();
+        for (int i = 0; i < getChildCount(); i++) {
+            getChildAt(i).getGlobalVisibleRect(rect);
+            r.op(rect, Region.Op.UNION);
+        }
+        inoutInfo.setTouchableInsets(ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
+        inoutInfo.touchableRegion.set(r);
+    }
 }