question: private float computeOverscrollPercent ( ) { if ( mOverScrollOffset >= 0 ) { return mOverScrollOffset / mMaxOverScroll ; } else { return mOverScrollOffset / mMaxUnderScroll ; } }
target:  Determine the current amount of overscroll. If the value is 0, there is no overscroll. If the value is < 0, tabs are overscrolling towards the top or or left. If the value is > 0, tabs are overscrolling towards the bottom or right.