/**
* Tests scrollability within child views of v given a delta of dx.
*
* @param v View to test for horizontal scrollability
* @param checkV Whether the view v passed should itself be checked for scrollability (true), or
* just its children (false).
* @param dx Delta scrolled in pixels
* @param x X coordinate of the active touch point
* @param y Y coordinate of the active touch point
* @return true if child views of v can be scrolled by delta of dx.
*/
protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
if (v instanceof ViewGroup) {
final ViewGroup group = (ViewGroup) v;
final int scrollX = v.getScrollX();
final int scrollY = v.getScrollY();
final int count = group.getChildCount();
// Count backwards - let topmost views consume scroll distance first.
for (int i = count - 1; i >= 0; i--) {
final View child = group.getChildAt(i);
if (x + scrollX >= child.getLeft()
&& x + scrollX < child.getRight()
&& y + scrollY >= child.getTop()
&& y + scrollY < child.getBottom()
&& canScroll(
child, true, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
return true;
}
}
}
return checkV && ViewCompat.canScrollHorizontally(v, -dx);
}
/*
* Enabled aggressive block sorting
*/
protected boolean canScroll(View view, boolean bl, int n, int n2, int n3) {
if (view instanceof ViewGroup) {
ViewGroup viewGroup = (ViewGroup)view;
int n4 = view.getScrollX();
int n5 = view.getScrollY();
for (int i = viewGroup.getChildCount() - 1; i >= 0; --i) {
View view2 = viewGroup.getChildAt(i);
if (n2 + n4 < view2.getLeft() || n2 + n4 >= view2.getRight() || n3 + n5 < view2.getTop() || n3 + n5 >= view2.getBottom() || !this.canScroll(view2, true, n, n2 + n4 - view2.getLeft(), n3 + n5 - view2.getTop())) continue;
return true;
}
}
if (bl) {
if (!this.isLayoutRtlSupport()) {
n = - n;
}
if (ViewCompat.canScrollHorizontally(view, n)) {
return true;
}
}
return false;
}
private boolean canChildScrollLeft() {
return ViewCompat.canScrollHorizontally(scrollChild, 1);
}