fix scrolllayer improper culling

Author: dankmeme01

loader/src/ui/nodes/ScrollLayer.cpp

@@ -18,9 +18,18 @@ void GenericContentLayer::setPosition(CCPoint const& pos) {
     // all be TableViewCells
     CCLayerColor::setPosition(pos);
 
+    CCSize scrollLayerSize{};
+    if (auto parent = this->getParent()) {
+        scrollLayerSize = parent->getContentSize();
+    }
+
     for (auto child : CCArrayExt<CCNode*>(m_pChildren)) {
-        auto y = this->getPositionY() + child->getPositionY();
-        child->setVisible(!((m_obContentSize.height < y) || (y < -child->getContentSize().height)));
+        float childY = this->getPositionY() + child->getPositionY();
+        float childTop = childY + (1.f - child->getAnchorPoint().y) * child->getScaledContentSize().height;
+        float childBottom = childY - child->getAnchorPoint().y * child->getScaledContentSize().height;
+        bool visible = childTop > 0 && childBottom < scrollLayerSize.height;
+        
+        child->setVisible(visible);
     }
 }