From 0c2fcca0a1674841ac5a51704d42f55864d26ad1 Mon Sep 17 00:00:00 2001
From: Lyn Han <lynhan@google.com>
Date: Wed, 28 Apr 2021 07:50:01 -0500
Subject: [PATCH] Swipe a little, open shade a lot

Bug: 172289889
Test: manual
Change-Id: Ib3117685d24c5dff1e926ade0e1af6bc6f12708a
---
 .../statusbar/phone/PanelViewController.java       | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
index 4714c4b5d4760..d0bdf40d1f0b2 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
@@ -42,6 +42,7 @@ import android.view.ViewConfiguration;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
 
 import com.android.internal.jank.InteractionJankMonitor;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
@@ -139,6 +140,7 @@ public abstract class PanelViewController {
      */
     private boolean mInstantExpanding;
     private boolean mAnimateAfterExpanding;
+    private boolean mIsFlinging;
 
     PanelBar mBar;
 
@@ -596,6 +598,7 @@ public abstract class PanelViewController {
             notifyExpandingFinished();
             return;
         }
+        mIsFlinging = true;
         mOverExpandedBeforeFling = getOverExpansionAmount() > 0f;
         ValueAnimator animator = createHeightAnimator(target);
         mFlingTarget = target;
@@ -679,6 +682,7 @@ public abstract class PanelViewController {
     }
 
     private void onFlingEnd(boolean cancelled) {
+        mIsFlinging = false;
         setAnimator(null);
         mKeyguardStateController.notifyPanelFlingEnd();
         if (!cancelled) {
@@ -751,6 +755,16 @@ public abstract class PanelViewController {
         if (isNaN(h)) {
             Log.wtf(TAG, "ExpandedHeight set to NaN");
         }
+        if (mAmbientState.isExpansionChanging()
+                && !mIsFlinging  // Fling already uses interpolated height from end of swipe
+                && !mAmbientState.isOnKeyguard()
+                && !mAmbientState.isDozing()
+                && !mAmbientState.isPulsing()) {
+            final float fraction = h / mView.getHeight();
+            final float interpolatedFraction = new PathInterpolator(0.2f, 0.8f, 0.8f, 1f)
+                    .getInterpolation(fraction);
+            h = interpolatedFraction * mView.getHeight();
+        }
         maybeOverScrollForShadeFlingOpen(h);
         if (mExpandLatencyTracking && h != 0f) {
             DejankUtils.postAfterTraversal(