Eeschema: fix isssues in net names selection for not named nets (i.e. nets without labels)

eeschema/class_netlist_object.cpp

@@ -347,12 +347,14 @@ wxString NETLIST_OBJECT::GetShortNetName() const
 
     if( m_netNameCandidate->m_Type == NET_PIN )
     {
-        if( m_Link )
+        SCH_COMPONENT* link = (SCH_COMPONENT*)m_netNameCandidate->m_Link;
+        if( link )  // Should be always true
         {
             netName = wxT("Net-<");
-            netName << ( (SCH_COMPONENT*) m_Link )->GetRef( &m_SheetList );
-            netName << wxT("-Pad") << LIB_PIN::ReturnPinStringNum( m_PinNum );
-            netName << wxT(">");
+            netName << link->GetRef( &m_netNameCandidate->m_SheetList );
+            netName << wxT("-Pad")
+                    << LIB_PIN::ReturnPinStringNum( m_netNameCandidate->m_PinNum )
+                    << wxT(">");
         }
     }
     else

eeschema/class_netlist_object.h

@@ -164,6 +164,12 @@ public:
      */
     void SetNetNameCandidate( NETLIST_OBJECT* aCandidate );
 
+    /**
+     * @return true if an item has already a net name candidate
+     * and false if not ( m_netNameCandidate == NULL )
+     */
+    bool HasNetNameCandidate() { return m_netNameCandidate != NULL; }
+
     /**
      * Function GetPinNum
      * returns a pin number in wxString form.  Pin numbers are not always

eeschema/netlist.cpp

@@ -467,26 +467,40 @@ void NETLIST_OBJECT_LIST::findBestNetNameForEachNet()
     // (to avoid net names changes when the net is not modified,
     // even if components are moved or deleted and undelete or replaced, as long
     // the reference is kept)
-    netcode = 0;
+
+    // Build the list of items with no net names
+    NETLIST_OBJECT_LIST list;
+    for( unsigned ii = 0; ii < size(); ii++ )
+    {
+        item = GetItem( ii );
+        if( !item->HasNetNameCandidate() )
+            list.push_back( item );
+    }
+
+    if( list.size() == 0 )
+        return;
+
     idxstart = 0;
     candidate = NULL;
-    item = NULL;
-    for( unsigned ii = 0; ii <= size(); ii++ )
+    netcode = list.GetItemNet( 0 );
+
+    for( unsigned ii = 0; ii <= list.size(); ii++ )
     {
-        if( ii == size() ) // last item already found
-            netcode = -2;
-        else
-            item = GetItem( ii );
+        if( ii < list.size() )
+            item = list.GetItem( ii );
 
-        if( netcode != item->GetNet() )     // End of net found
+        if( netcode != item->GetNet() || ii >= list.size() )     // End of net found
         {
             if( candidate )
             {
                 for (unsigned jj = idxstart; jj < ii; jj++ )
-                    GetItem( jj )->SetNetNameCandidate( candidate );
+                {
+                    NETLIST_OBJECT* obj = list.GetItem( jj );
+                    obj->SetNetNameCandidate( candidate );
+                }
             }
 
-            if( netcode == -2 )
+            if( ii >= list.size() )
                 break;
 
             netcode = item->GetNet();
@@ -494,17 +508,26 @@ void NETLIST_OBJECT_LIST::findBestNetNameForEachNet()
             idxstart = ii;
         }
 
-        if( item->m_Type == NET_PIN && item->GetShortNetName().IsEmpty() )
+        // Search all pins having no net name candidate yet, i.e. on nets
+        // having no labels
+        if( item->m_Type == NET_PIN )
         {
-            // A candidate is found: select the better between the previous
-            // and this one
-            item->SetNetNameCandidate( item );  // Needed to calculate GetShortNetName
-            if( candidate == NULL )
-                candidate = item;
-            else
+            // A candidate is found, however components which are not in
+            // netlist are not candidate because some have their reference
+            // is changed each time the netlist is built (power components)
+            // and anyway they are not a good candidate
+            SCH_COMPONENT* link = (SCH_COMPONENT*)item->m_Link;
+            if( link->IsInNetlist() )
             {
-                if( item->GetShortNetName().Cmp( candidate->GetShortNetName() ) < 0 )
+                // select the better between the previous and this one
+                item->SetNetNameCandidate( item );  // Needed to calculate GetShortNetName
+                if( candidate == NULL )
                     candidate = item;
+                else
+                {
+                    if( item->GetShortNetName().Cmp( candidate->GetShortNetName() ) < 0 )
+                        candidate = item;
+                }
             }
         }
     }

eeschema/sch_component.cpp

@@ -1888,6 +1888,15 @@ bool SCH_COMPONENT::doIsConnected( const wxPoint& aPosition ) const
     return false;
 }
 
+/* return true if the component is in netlist
+ * which means this is not a power component, or something
+ * like a component reference starting by #
+ */
+bool SCH_COMPONENT::IsInNetlist() const
+{
+    SCH_FIELD* rf = GetField( REFERENCE );
+    return ! rf->GetText().StartsWith("#");
+}
 
 void SCH_COMPONENT::Plot( PLOTTER* aPlotter )
 {

eeschema/sch_component.h

@@ -365,6 +365,13 @@ public:
 
     bool IsConnectable() const { return true; }
 
+    /**
+     * @return true if the component is in netlist
+     * which means this is not a power component, or something
+     * like a component reference starting by #
+     */
+    bool IsInNetlist() const;
+
     void GetConnectionPoints( vector< wxPoint >& aPoints ) const;
 
     SEARCH_RESULT Visit( INSPECTOR* inspector, const void* testData,