private void scrollBy(int deltaX, int deltaY) {
if (deltaX == 0 && deltaY == 0) return;
final int scrollX = mDelegate.getContainerViewScrollX();
final int scrollY = mDelegate.getContainerViewScrollY();
final int scrollRangeX = computeMaximumHorizontalScrollOffset();
final int scrollRangeY = computeMaximumVerticalScrollOffset();
// The android.view.View.overScrollBy method is used for both scrolling and over-scrolling
// which is why we use it here.
mDelegate.overScrollContainerViewBy(
deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, mProcessingTouchEvent);
}
// Called by the native side to attempt to scroll the container view.
public void scrollContainerViewTo(int x, int y) {
mNativeScrollX = x;
mNativeScrollY = y;
final int scrollX = mDelegate.getContainerViewScrollX();
final int scrollY = mDelegate.getContainerViewScrollY();
final int deltaX = x - scrollX;
final int deltaY = y - scrollY;
final int scrollRangeX = computeMaximumHorizontalScrollOffset();
final int scrollRangeY = computeMaximumVerticalScrollOffset();
// We use overScrollContainerViewBy to be compatible with WebViewClassic which used this
// method for handling both over-scroll as well as in-bounds scroll.
mDelegate.overScrollContainerViewBy(
deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, mProcessingTouchEvent);
}
