share BuildingSystem's free functions instead of copying them

src/ui/SelectedBuildingPanel.cpp

@@ -84,20 +84,6 @@ bool hasRecipeSelection(BuildingType type)
         || type == BuildingType::Shipyard;
 }
 
-// Auto-recipe buildings have no selected recipe; their production is driven by
-// whatever inputs they receive.
-bool isAutoRecipeBuilding(BuildingType type)
-{
-    return type == BuildingType::Smelter
-        || type == BuildingType::ReprocessingPlant;
-}
-
-bool isBeltLike(BuildingType type)
-{
-    return type == BuildingType::Belt || type == BuildingType::Splitter
-        || type == BuildingType::TunnelEntry || type == BuildingType::TunnelExit;
-}
-
 QString rotationLabel(Rotation r)
 {
     switch (r)
@@ -313,7 +299,7 @@ void SelectedBuildingPanel::buildSingle(BuildingId id)
 
     // Belt "Clear" removes items from a live belt tile; a construction site has
     // none and is not registered with BeltSystem yet, so hide it for sites.
-    if (isBeltLike(type) && !m_singleIsSite)
+    if (isBeltSubsystemType(type) && !m_singleIsSite)
     {
         m_clearBeltBtn->show();
     }
@@ -394,7 +380,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
     // Auto-recipe buildings (Smelter, Reprocessing Plant) have no selected
     // recipe; while a cycle runs, resolve the recipe actually in production so
     // the cycle time and progress can be shown (REQ-UI-PRODUCTION-PROGRESS).
-    if (!recipe && isAutoRecipeBuilding(b->type) && b->production.has_value())
+    if (!recipe && isAutoRecipeBuildingType(b->type) && b->production.has_value())
     {
         recipe = m_config->recipes.findRecipeDef(b->production->recipeId, b->type);
     }
@@ -488,7 +474,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
     }
 
     if (isProductionBuilding(b->type)
-        && (recipe || shipDef || isAutoRecipeBuilding(b->type)))
+        && (recipe || shipDef || isAutoRecipeBuildingType(b->type)))
     {
         if (recipe || shipDef)
         {
@@ -683,7 +669,7 @@ void SelectedBuildingPanel::buildMulti(const std::vector<BuildingId>& ids)
     {
         text += buildingTypeName(entry.first) + " x "
             + QString::number(entry.second) + "\n";
-        if (isBeltLike(entry.first))
+        if (isBeltSubsystemType(entry.first))
         {
             hasBelt = true;
         }
@@ -832,7 +818,7 @@ void SelectedBuildingPanel::onClearBelt()
     for (BuildingId id : m_selectedBuildingIds)
     {
         const Building* b = m_sim->getBuildings().findBuilding(id);
-        if (b && isBeltLike(b->type))
+        if (b && isBeltSubsystemType(b->type))
         {
             for (const QPoint& cell : b->bodyCells)
             {