App: refactor ComplexGeoData::getSubElementByName

src/App/ComplexGeoData.cpp

@@ -57,19 +57,25 @@ using namespace Data;
 
 ComplexGeoData::ComplexGeoData() = default;
 
-Data::Segment* ComplexGeoData::getSubElementByName(const char* name) const
+std::pair<std::string, unsigned long> ComplexGeoData::getTypeAndIndex(const char* Name)
 {
     int index = 0;
     std::string element;
     boost::regex ex("^([^0-9]*)([0-9]*)$");
     boost::cmatch what;
 
-    if (boost::regex_match(name, what, ex)) {
+    if (boost::regex_match(Name, what, ex)) {
         element = what[1].str();
         index = std::atoi(what[2].str().c_str());
     }
 
-    return getSubElement(element.c_str(), static_cast<unsigned long>(index));
+    return std::make_pair(element, index);
+}
+
+Data::Segment* ComplexGeoData::getSubElementByName(const char* name) const
+{
+    auto type = getTypeAndIndex(name);
+    return getSubElement(type.first.c_str(),type.second);
 }
 
 void ComplexGeoData::applyTransform(const Base::Matrix4D& rclTrf)

src/App/ComplexGeoData.h

@@ -95,6 +95,9 @@ public:
      */
     virtual std::vector<const char*> getElementTypes() const=0;
     virtual unsigned long countSubElements(const char* Type) const=0;
+    /// Returns a generic element type and index. The determined element type isn't
+    /// necessarily supported by this geometry.
+    static std::pair<std::string, unsigned long> getTypeAndIndex(const char* Name);
     /// get the sub-element by type and number
     virtual Segment* getSubElement(const char* Type, unsigned long) const=0;
     /// get sub-element by combined name