Fixed an issue where the panel could be stuck tracking

Multiple issues are fixed that could lead to the panel being
stuck on the lockscreen. The easiest way to reproduce it was
to swipe up while on ambient display, which could easily happen
in a pocket.
This also adds some safeguards, such that it won't happen again
and ensures that notifications can't be swiped in AOD.

Test: add notifications in AOD, try swiping on them
Change-Id: I8ba0ebe72c3a2734b59443f3b93dbe5f1837cbbd
Fixes: 38486627
(cherry picked from commit be2c443e21410bb27decec5d2aea60ef37f10c05)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
index 5cb3c1f..8368143 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShelf.java
@@ -165,7 +165,7 @@
             openedAmount = Math.min(1.0f, openedAmount);
             mShelfState.openedAmount = openedAmount;
             mShelfState.clipTopAmount = 0;
-            mShelfState.alpha = mAmbientState.isPulsing() ? 0 : 1;
+            mShelfState.alpha = mAmbientState.hasPulsingNotifications() ? 0 : 1;
             mShelfState.belowSpeedBump = mAmbientState.getSpeedBumpIndex() == 0;
             mShelfState.shadowAlpha = 1.0f;
             mShelfState.hideSensitive = false;
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
index 4b1d7d7..b1d82b1 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -55,6 +55,7 @@
     private long mDownTime;
     private float mMinExpandHeight;
     private LockscreenGestureLogger mLockscreenGestureLogger = new LockscreenGestureLogger();
+    private boolean mPanelUpdateWhenAnimatorEnds;
 
     private final void logf(String fmt, Object... args) {
         Log.v(TAG, (mViewName != null ? (mViewName + ": ") : "") + String.format(fmt, args));
@@ -507,7 +508,7 @@
 
     @Override
     public boolean onInterceptTouchEvent(MotionEvent event) {
-        if (mInstantExpanding || !mNotificationsDragEnabled
+        if (mInstantExpanding || !mNotificationsDragEnabled || mTouchDisabled
                 || (mMotionAborted && event.getActionMasked() != MotionEvent.ACTION_DOWN)) {
             return false;
         }
@@ -758,14 +759,14 @@
                 if (clearAllExpandHack && !mCancelled) {
                     setExpandedHeightInternal(getMaxPanelHeight());
                 }
-                mHeightAnimator = null;
+                setAnimator(null);
                 if (!mCancelled) {
                     notifyExpandingFinished();
                 }
                 notifyBarPanelExpansionChanged();
             }
         });
-        mHeightAnimator = animator;
+        setAnimator(animator);
         animator.start();
     }
 
@@ -802,15 +803,28 @@
     protected void requestPanelHeightUpdate() {
         float currentMaxPanelHeight = getMaxPanelHeight();
 
-        // If the user isn't actively poking us, let's update the height
-        if ((!mTracking || isTrackingBlocked())
-                && mHeightAnimator == null
-                && !isFullyCollapsed()
-                && currentMaxPanelHeight != mExpandedHeight
-                && mPeekAnimator == null
-                && !mPeekTouching) {
-            setExpandedHeight(currentMaxPanelHeight);
+        if (isFullyCollapsed()) {
+            return;
         }
+
+        if (currentMaxPanelHeight == mExpandedHeight) {
+            return;
+        }
+
+        if (mPeekAnimator != null || mPeekTouching) {
+            return;
+        }
+
+        if (mTracking && !isTrackingBlocked()) {
+            return;
+        }
+
+        if (mHeightAnimator != null) {
+            mPanelUpdateWhenAnimatorEnds = true;
+            return;
+        }
+
+        setExpandedHeight(currentMaxPanelHeight);
     }
 
     public void setExpandedHeightInternal(float h) {
@@ -1062,7 +1076,7 @@
             @Override
             public void onAnimationEnd(Animator animation) {
                 if (mCancelled) {
-                    mHeightAnimator = null;
+                    setAnimator(null);
                     onAnimationFinished.run();
                 } else {
                     startUnlockHintAnimationPhase2(onAnimationFinished);
@@ -1070,7 +1084,7 @@
             }
         });
         animator.start();
-        mHeightAnimator = animator;
+        setAnimator(animator);
         mKeyguardBottomArea.getIndicationArea().animate()
                 .translationY(-mHintDistance)
                 .setDuration(250)
@@ -1088,6 +1102,14 @@
                 .start();
     }
 
+    private void setAnimator(ValueAnimator animator) {
+        mHeightAnimator = animator;
+        if (animator == null && mPanelUpdateWhenAnimatorEnds) {
+            mPanelUpdateWhenAnimatorEnds = false;
+            requestPanelHeightUpdate();
+        }
+    }
+
     /**
      * Phase 2: Bounce down.
      */
@@ -1098,13 +1120,13 @@
         animator.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
-                mHeightAnimator = null;
+                setAnimator(null);
                 onAnimationFinished.run();
                 notifyBarPanelExpansionChanged();
             }
         });
         animator.start();
-        mHeightAnimator = animator;
+        setAnimator(animator);
     }
 
     private ValueAnimator createHeightAnimator(float targetHeight) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
index 24c1928..4e28e90 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
@@ -4940,7 +4940,6 @@
             where.getLocationInWindow(mTmpInt2);
             mWakeUpTouchLocation = new PointF(mTmpInt2[0] + where.getWidth() / 2,
                     mTmpInt2[1] + where.getHeight() / 2);
-            mNotificationPanel.setTouchDisabled(false);
             mStatusBarKeyguardViewManager.notifyDeviceWakeUpRequested();
             mFalsingManager.onScreenOnFromTouch();
         }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
index f050be4..236e008 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java
@@ -277,7 +277,7 @@
 
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
-        if (mService.isDozing() && !mService.isPulsing()) {
+        if (mService.isDozing() && !mStackScrollLayout.hasPulsingNotifications()) {
             // Capture all touch events in always-on.
             return true;
         }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
index e409b9c..41ef781 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/AmbientState.java
@@ -59,7 +59,7 @@
     private boolean mPanelTracking;
     private boolean mExpansionChanging;
     private boolean mPanelFullWidth;
-    private boolean mPulsing;
+    private boolean mHasPulsingNotifications;
     private boolean mUnlockHintRunning;
 
     public AmbientState(Context context) {
@@ -287,12 +287,12 @@
         mPanelTracking = panelTracking;
     }
 
-    public boolean isPulsing() {
-        return mPulsing;
+    public boolean hasPulsingNotifications() {
+        return mHasPulsingNotifications;
     }
 
-    public void setPulsing(boolean pulsing) {
-        mPulsing = pulsing;
+    public void setHasPulsingNotifications(boolean hasPulsing) {
+        mHasPulsingNotifications = hasPulsing;
     }
 
     public boolean isPanelTracking() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index c8af4c8..cd93b97 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -53,7 +53,6 @@
 import android.view.WindowInsets;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityNodeInfo;
-import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.view.animation.Interpolator;
 import android.widget.OverScroller;
@@ -1941,7 +1940,7 @@
         int numShownItems = 0;
         boolean finish = false;
         int maxDisplayedNotifications = mAmbientState.isDark()
-                ? (isPulsing() ? 1 : 0)
+                ? (hasPulsingNotifications() ? 1 : 0)
                 : mMaxDisplayedNotifications;
 
         for (int i = 0; i < getChildCount(); i++) {
@@ -1950,7 +1949,8 @@
                     && !expandableView.hasNoContentHeight()) {
                 boolean limitReached = maxDisplayedNotifications != -1
                         && numShownItems >= maxDisplayedNotifications;
-                boolean notificationOnAmbientThatIsNotPulsing = isPulsing()
+                boolean notificationOnAmbientThatIsNotPulsing = mAmbientState.isDark()
+                        && hasPulsingNotifications()
                         && expandableView instanceof ExpandableNotificationRow
                         && !isPulsing(((ExpandableNotificationRow) expandableView).getEntry());
                 if (limitReached || notificationOnAmbientThatIsNotPulsing) {
@@ -2008,7 +2008,7 @@
         return false;
     }
 
-    private boolean isPulsing() {
+    public boolean hasPulsingNotifications() {
         return mPulsing != null;
     }
 
@@ -2838,7 +2838,7 @@
     }
 
     private void updateNotificationAnimationStates() {
-        boolean running = mAnimationsEnabled || isPulsing();
+        boolean running = mAnimationsEnabled || hasPulsingNotifications();
         mShelf.setAnimationsEnabled(running);
         int childCount = getChildCount();
         for (int i = 0; i < childCount; i++) {
@@ -2849,7 +2849,7 @@
     }
 
     private void updateAnimationState(View child) {
-        updateAnimationState((mAnimationsEnabled || isPulsing())
+        updateAnimationState((mAnimationsEnabled || hasPulsingNotifications())
                 && (mIsExpanded || isPinnedHeadsUp(child)), child);
     }
 
@@ -4118,7 +4118,7 @@
             return;
         }
         mPulsing = pulsing;
-        mAmbientState.setPulsing(isPulsing());
+        mAmbientState.setHasPulsingNotifications(hasPulsingNotifications());
         updateNotificationAnimationStates();
         updateContentHeight();
         notifyHeightChangeListener(mShelf);