Item cleanup, moved LengthOnSide to impl

src/private/multisplitter/Item.cpp

@@ -60,7 +60,8 @@ inline Qt::Orientation orientationForLocation(Item::Location loc)
     return Qt::Vertical;
 }
 
-inline Qt::Orientation oppositeOrientation(Qt::Orientation o) {
+inline Qt::Orientation oppositeOrientation(Qt::Orientation o)
+{
     return o == Qt::Vertical ? Qt::Horizontal
                              : Qt::Vertical;
 }
@@ -76,6 +77,22 @@ inline QRect adjustedRect(QRect r, Qt::Orientation o, int p1, int p2)
     return r;
 }
 
+namespace Layouting {
+struct LengthOnSide
+{
+    int length = 0;
+    int minLength = 0;
+
+    int available() const {
+        return qMax(0, length - minLength);
+    }
+
+    int missing() const {
+        return qMax(0, minLength - length);
+    }
+};
+}
+
 ItemContainer *Item::root() const
 {
     return m_parent ? m_parent->root()
@@ -2330,8 +2347,8 @@ int ItemContainer::availableLength() const
                         : availableSize().width();
 }
 
-ItemContainer::LengthOnSide ItemContainer::lengthOnSide(const SizingInfo::List &sizes, int fromIndex,
-                                                        Side side, Qt::Orientation o) const
+LengthOnSide ItemContainer::lengthOnSide(const SizingInfo::List &sizes, int fromIndex,
+                                         Side side, Qt::Orientation o) const
 {
     if (fromIndex < 0)
         return {};
@@ -2455,17 +2472,6 @@ int ItemContainer::availableOnSide_recursive(const Item *child, Side side, Qt::O
     }
 }
 
-QVariantList ItemContainer::items() const
-{
-    QVariantList items;
-    items.reserve(d->m_children.size());
-
-    for (auto item : d->m_children)
-        items << QVariant::fromValue(item);
-
-    return items;
-}
-
 void ItemContainer::growNeighbours(Item *side1Neighbour, Item *side2Neighbour)
 {
     if (!side1Neighbour && !side2Neighbour)