From 1e14e961676cd79f1e3013380eadce2a4b00a9e0 Mon Sep 17 00:00:00 2001
From: Matthew Ng <ngmatthew@google.com>
Date: Thu, 3 May 2018 12:51:43 -0700
Subject: Allow gestures to executed started from deadzone on nav bar

Set slippery to true when gesture starts from deadzone and when finished
set slippery to its correct state.

Change-Id: I035d12f9639ce4af00db9e0d25b514f074b5198c
Fixes: 78886558
Test: swipe up from deadzone on nav bar (just above home button)
---
 .../statusbar/phone/NavigationBarView.java         | 27 ++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
index 6cc96da96e45..2fac13641405 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
@@ -124,6 +124,7 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav
 
     private GestureHelper mGestureHelper;
     private final DeadZone mDeadZone;
+    private boolean mDeadZoneConsuming = false;
     private final NavigationBarTransitions mBarTransitions;
     private final OverviewProxyService mOverviewProxyService;
 
@@ -291,8 +292,7 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav
 
     @Override
     public boolean onInterceptTouchEvent(MotionEvent event) {
-        if (mDeadZone.onTouchEvent(event)) {
-            // Consumed the touch event
+        if (shouldDeadZoneConsumeTouchEvents(event)) {
             return true;
         }
         switch (event.getActionMasked()) {
@@ -314,8 +314,7 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
-        if (mDeadZone.onTouchEvent(event)) {
-            // Consumed the touch event
+        if (shouldDeadZoneConsumeTouchEvents(event)) {
             return true;
         }
         if (mGestureHelper.onTouchEvent(event)) {
@@ -324,6 +323,26 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav
         return super.onTouchEvent(event);
     }
 
+    private boolean shouldDeadZoneConsumeTouchEvents(MotionEvent event) {
+        if (mDeadZone.onTouchEvent(event) || mDeadZoneConsuming) {
+            switch (event.getActionMasked()) {
+                case MotionEvent.ACTION_DOWN:
+                    // Allow gestures starting in the deadzone to be slippery
+                    setSlippery(true);
+                    mDeadZoneConsuming = true;
+                    break;
+                case MotionEvent.ACTION_CANCEL:
+                case MotionEvent.ACTION_UP:
+                    // When a gesture started in the deadzone is finished, restore slippery state
+                    updateSlippery();
+                    mDeadZoneConsuming = false;
+                    break;
+            }
+            return true;
+        }
+        return false;
+    }
+
     public @NavigationBarCompat.HitTarget int getDownHitTarget() {
         return mDownHitTarget;
     }
-- 
cgit v1.2.3-59-g8ed1b