Resolve text variables when resolving netclasses.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/22413

(cherry picked from commit 36c603b6f0)

eeschema/connection_graph.cpp

@@ -441,13 +441,13 @@ CONNECTION_SUBGRAPH::GetNetclassesForDriver( SCH_ITEM* aItem ) const
     // Get netclasses on attached rule areas
     for( SCH_RULE_AREA* ruleArea : ruleAreaCache )
     {
-        const std::vector<std::pair<wxString, SCH_ITEM*>> ruleNetclasses =
-                ruleArea->GetResolvedNetclasses();
+        const std::vector<std::pair<wxString, SCH_ITEM*>> ruleAreaNetclasses =
+                ruleArea->GetResolvedNetclasses( &m_sheet );
 
-        if( ruleNetclasses.size() > 0 )
+        if( ruleAreaNetclasses.size() > 0 )
         {
-            foundNetclasses.insert( foundNetclasses.end(), ruleNetclasses.begin(),
-                                    ruleNetclasses.end() );
+            foundNetclasses.insert( foundNetclasses.end(), ruleAreaNetclasses.begin(),
+                                    ruleAreaNetclasses.end() );
         }
     }
 

eeschema/sch_rule_area.cpp

@@ -342,7 +342,8 @@ const std::unordered_set<SCH_DIRECTIVE_LABEL*>& SCH_RULE_AREA::GetDirectives() c
 }
 
 
-const std::vector<std::pair<wxString, SCH_ITEM*>> SCH_RULE_AREA::GetResolvedNetclasses() const
+const std::vector<std::pair<wxString, SCH_ITEM*>>
+SCH_RULE_AREA::GetResolvedNetclasses( const SCH_SHEET_PATH* aSheetPath ) const
 {
     std::vector<std::pair<wxString, SCH_ITEM*>> resolvedNetclasses;
 
@@ -357,7 +358,7 @@ const std::vector<std::pair<wxString, SCH_ITEM*>> SCH_RULE_AREA::GetResolvedNetc
 
                         if( field->GetCanonicalName() == wxT( "Netclass" ) )
                         {
-                            wxString netclass = field->GetText();
+                            wxString netclass = field->GetShownText( aSheetPath, false );
 
                             if( netclass != wxEmptyString )
                                 resolvedNetclasses.push_back( { netclass, directive } );
@@ -395,8 +396,7 @@ void SCH_RULE_AREA::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PAN
 
     m_stroke.GetMsgPanelInfo( aFrame, aList );
 
-    const std::vector<std::pair<wxString, SCH_ITEM*>> netclasses =
-            SCH_RULE_AREA::GetResolvedNetclasses();
+    const std::vector<std::pair<wxString, SCH_ITEM*>> netclasses = SCH_RULE_AREA::GetResolvedNetclasses( nullptr );
     wxString resolvedNetclass = _( "<None>" );
 
     if( netclasses.size() > 0 )

eeschema/sch_rule_area.h

@@ -95,7 +95,7 @@ public:
     /// Resolve the netclass of this rule area from connected directive labels.
     ///
     /// @return The resolved netclass (if any), and the SCH_ITEM providing the declaration.
-    const std::vector<std::pair<wxString, SCH_ITEM*>> GetResolvedNetclasses() const;
+    const std::vector<std::pair<wxString, SCH_ITEM*>> GetResolvedNetclasses( const SCH_SHEET_PATH* aSheetPath ) const;
 
     /// Clear and resets items and directives attached to this rule area.
     void ResetDirectivesAndItems( KIGFX::SCH_VIEW* view );