Fixed a bug that the panel was not closable in the locked shade

This happened when draging on the active lock icon.

Bug: 18185875
Change-Id: I27917fad000bc89f37b82fc8be978d867356904e

packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java

@@ -536,6 +536,14 @@ public class NotificationPanelView extends PanelView implements
         }
     }
 
+    @Override
+    protected boolean isInContentBounds(float x, float y) {
+        float yTransformed = y - mNotificationStackScroller.getY();
+        float stackScrollerX = mNotificationStackScroller.getX();
+        return mNotificationStackScroller.isInContentBounds(yTransformed) && stackScrollerX < x
+                && x < stackScrollerX + mNotificationStackScroller.getWidth();
+    }
+
     private void resetDownStates(MotionEvent event) {
         if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
             mOnlyAffordanceInThisMotion = false;

packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java

@@ -70,6 +70,7 @@ public abstract class PanelView extends FrameLayout {
     private boolean mOverExpandedBeforeFling;
     private boolean mTouchAboveFalsingThreshold;
     private int mUnlockFalsingThreshold;
+    private boolean mTouchStartedInEmptyArea;
 
     private ValueAnimator mHeightAnimator;
     private ObjectAnimator mPeekAnimator;
@@ -409,6 +410,7 @@ public abstract class PanelView extends FrameLayout {
                 }
                 mInitialTouchY = y;
                 mInitialTouchX = x;
+                mTouchStartedInEmptyArea = !isInContentBounds(x, y);
                 mTouchSlopExceeded = false;
                 mJustPeeked = false;
                 mPanelClosedOnDown = mExpandedHeight == 0.0f;
@@ -432,7 +434,7 @@ public abstract class PanelView extends FrameLayout {
             case MotionEvent.ACTION_MOVE:
                 final float h = y - mInitialTouchY;
                 trackMovement(event);
-                if (scrolledToBottom) {
+                if (scrolledToBottom || mTouchStartedInEmptyArea) {
                     if (h < -mTouchSlop && h < -Math.abs(x - mInitialTouchX)) {
                         cancelHeightAnimator();
                         mInitialOffsetOnTouch = mExpandedHeight;
@@ -452,6 +454,11 @@ public abstract class PanelView extends FrameLayout {
         return false;
     }
 
+    /**
+     * @return Whether a pair of coordinates are inside the visible view content bounds.
+     */
+    protected abstract boolean isInContentBounds(float x, float y);
+
     private void cancelHeightAnimator() {
         if (mHeightAnimator != null) {
             mHeightAnimator.cancel();

packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java

@@ -1915,7 +1915,14 @@ public class NotificationStackScrollLayout extends ViewGroup
      * @return Whether the specified motion event is actually happening over the content.
      */
     private boolean isInContentBounds(MotionEvent event) {
-        return event.getY() < getHeight() - getEmptyBottomMargin();
+        return isInContentBounds(event.getY());
+    }
+
+    /**
+     * @return Whether a y coordinate is inside the content.
+     */
+    public boolean isInContentBounds(float y) {
+        return y < getHeight() - getEmptyBottomMargin();
     }
 
     private void setIsBeingDragged(boolean isDragged) {