Added anti-falsing logic to the keyguard.

Newly enforcing a threshold for the following cases:
Unlocking, Dismissing Notifications, Swiping Down Quick settings.
Also increased the affordance threshold slightly.

Bug: 15433087
Change-Id: I723346dedf9ae0e3f8b103182992ab572fc394b9
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
index 387abc3..d3c3f56 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
@@ -160,6 +160,8 @@
 
     private boolean mQsScrimEnabled = true;
     private boolean mLastAnnouncementWasQuickSettings;
+    private boolean mQsTouchAboveFalsingThreshold;
+    private int mQsFalsingThreshold;
 
     public NotificationPanelView(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -230,6 +232,8 @@
         mClockPositionAlgorithm.loadDimens(getResources());
         mNotificationScrimWaitDistance =
                 getResources().getDimensionPixelSize(R.dimen.notification_scrim_wait_distance);
+        mQsFalsingThreshold = getResources().getDimensionPixelSize(
+                R.dimen.qs_falsing_threshold);
     }
 
     public void updateResources() {
@@ -526,6 +530,7 @@
     private void resetDownStates(MotionEvent event) {
         if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
             mOnlyAffordanceInThisMotion = false;
+            mQsTouchAboveFalsingThreshold = mQsFullyExpanded;
         }
     }
 
@@ -546,6 +551,9 @@
     }
 
     private boolean flingExpandsQs(float vel) {
+        if (!mQsTouchAboveFalsingThreshold && mStatusBarState == StatusBarState.KEYGUARD) {
+            return false;
+        }
         if (Math.abs(vel) < mFlingAnimationUtils.getMinVelocityPxPerSecond()) {
             return getQsExpansionFraction() > 0.5f;
         } else {
@@ -690,6 +698,9 @@
             case MotionEvent.ACTION_MOVE:
                 final float h = y - mInitialTouchY;
                 setQsExpansion(h + mInitialHeightOnTouch);
+                if (h >= mQsFalsingThreshold) {
+                    mQsTouchAboveFalsingThreshold = true;
+                }
                 trackMovement(event);
                 break;
 
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 b175fd5..e818d23 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -68,6 +68,8 @@
     protected boolean mHintAnimationRunning;
     private boolean mOverExpandedBeforeFling;
     private float mOriginalIndicationY;
+    private boolean mTouchAboveFalsingThreshold;
+    private int mUnlockFalsingThreshold;
 
     private ValueAnimator mHeightAnimator;
     private ObjectAnimator mPeekAnimator;
@@ -183,6 +185,7 @@
         mTouchSlop = configuration.getScaledTouchSlop();
         mHintDistance = res.getDimension(R.dimen.hint_move_distance);
         mEdgeTapAreaWidth = res.getDimensionPixelSize(R.dimen.edge_tap_area_width);
+        mUnlockFalsingThreshold = res.getDimensionPixelSize(R.dimen.unlock_falsing_threshold);
     }
 
     private void trackMovement(MotionEvent event) {
@@ -234,6 +237,7 @@
                 mHasLayoutedSinceDown = false;
                 mUpdateFlingOnLayout = false;
                 mPeekTouching = mPanelClosedOnDown;
+                mTouchAboveFalsingThreshold = false;
                 if (mVelocityTracker == null) {
                     initVelocityTracker();
                 }
@@ -298,6 +302,9 @@
                     }
                     mJustPeeked = false;
                 }
+                if (-h >= mUnlockFalsingThreshold) {
+                    mTouchAboveFalsingThreshold = true;
+                }
                 if (!mJustPeeked && (!waitForTouchSlop || mTracking) && !isTrackingBlocked()) {
                     setExpandedHeightInternal(newHeight);
                 }
@@ -399,6 +406,7 @@
                 mPanelClosedOnDown = mExpandedHeight == 0.0f;
                 mHasLayoutedSinceDown = false;
                 mUpdateFlingOnLayout = false;
+                mTouchAboveFalsingThreshold = false;
                 initVelocityTracker();
                 trackMovement(event);
                 break;
@@ -471,6 +479,9 @@
      * @return whether a fling should expands the panel; contracts otherwise
      */
     protected boolean flingExpands(float vel, float vectorVel) {
+        if (!mTouchAboveFalsingThreshold && mStatusBar.isFalsingThresholdNeeded()) {
+            return true;
+        }
         if (Math.abs(vectorVel) < mFlingAnimationUtils.getMinVelocityPxPerSecond()) {
             return getExpandedFraction() > 0.5f;
         } else {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 620d3ec..21dc27e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -686,6 +686,7 @@
         mStackScroller = (NotificationStackScrollLayout) mStatusBarWindow.findViewById(
                 R.id.notification_stack_scroller);
         mStackScroller.setLongPressListener(getNotificationLongClicker());
+        mStackScroller.setPhoneStatusBar(this);
 
         mKeyguardIconOverflowContainer =
                 (NotificationOverflowContainer) LayoutInflater.from(mContext).inflate(
@@ -2053,6 +2054,12 @@
         return mNotificationPanel.isQsExpanded();
     }
 
+    public boolean isFalsingThresholdNeeded() {
+        boolean onKeyguard = getBarState() == StatusBarState.KEYGUARD;
+        boolean isMethodInSecure = mUnlockMethodCache.isMethodInsecure();
+        return onKeyguard && isMethodInSecure;
+    }
+
     @Override  // NotificationData.Environment
     public String getCurrentMediaNotificationKey() {
         return mMediaNotificationKey;