From 017c8d52d5f64a805a44750796324b0300b6aaa5 Mon Sep 17 00:00:00 2001
From: Andy Wickham <awickham@google.com>
Date: Tue, 18 Feb 2020 23:58:57 +0000
Subject: [PATCH] Disables Back gesture while sandbox is running.

We'll want to detect this gesture ourselves to distinguish
between left and right edge and update the UI accordingly.

Note: This exclusion only works if the sandbox is launched
into the same task as Launcher (i.e. from Launcher itself).
I haven't found a way to get this to happen over adb.

Test: Launched BackGestureTutorialActivity from Launcher
and verified Back gesture animations did not play and the
onBackPressed callback was not called. Verified these did
still work in other apps.

Bug: 148542211
Change-Id: Iebc3428738edbf8ebfcff157f5952b787eb46bac
---
 .../BackGestureTutorialActivity.java          | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
index 295ab4897e..d2a0951c62 100644
--- a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
+++ b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
@@ -16,7 +16,10 @@
 package com.android.quickstep.interaction;
 
 import android.graphics.Color;
+import android.graphics.Rect;
 import android.os.Bundle;
+import android.util.DisplayMetrics;
+import android.view.Display;
 import android.view.View;
 import android.view.Window;
 
@@ -26,6 +29,7 @@ import com.android.launcher3.R;
 import com.android.quickstep.interaction.BackGestureTutorialFragment.TutorialStep;
 import com.android.quickstep.interaction.BackGestureTutorialFragment.TutorialType;
 
+import java.util.List;
 import java.util.Optional;
 
 /** Shows the Back gesture interactive tutorial in full screen mode. */
@@ -46,6 +50,12 @@ public class BackGestureTutorialActivity extends FragmentActivity {
                 .commit();
     }
 
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        disableSystemGestures();
+    }
+
     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         super.onWindowFocusChanged(hasFocus);
@@ -70,4 +80,14 @@ public class BackGestureTutorialActivity extends FragmentActivity {
                         | View.SYSTEM_UI_FLAG_FULLSCREEN);
         getWindow().setNavigationBarColor(Color.TRANSPARENT);
     }
+
+    private void disableSystemGestures() {
+        Display display = getDisplay();
+        if (display != null) {
+            DisplayMetrics metrics = new DisplayMetrics();
+            display.getMetrics(metrics);
+            getWindow().setSystemGestureExclusionRects(
+                    List.of(new Rect(0, 0, metrics.widthPixels, metrics.heightPixels)));
+        }
+    }
 }