// Rule: UselessLayout
//
// Description: Checks whether current node can be removed.
//
// Conditions:
// - The node has children
// - The node does not have siblings
// - The node's parent is not a scroll view (horizontal or vertical)
// - The node does not have a background or its parent does not have a
//   background or neither the node and its parent have a background
// - The parent is not a <merge/>

if (!xml.isRoot() && !(xml['..'].name() in ["ScrollView", "HorizontalScrollView"]) &&
        xml['..']['*'].size() == 1 && xml['*'].size() > 0 && ((xml.'@android:background' ||
        xml['..'].'@android:background') || (!xml.'@android:background' &&
        !xml['..'].'@android:background'))) {
    analysis << [node: node, description: "This ${xml.name()} layout or " +
            "its ${xml['..'].name()} parent is " +
            "${xml['..'].'@android:id' ? "possibly useless" : "useless"}"]
}