Tighten up refresh logic for net & netclass references.

Also tightens it up a bit for text variables which can reference things
like netnames and netclasses, but also board settings.

Fixes https://gitlab.com/kicad/code/kicad/issues/13032

eeschema/tools/sch_editor_control.cpp

@@ -45,6 +45,8 @@
 #include <sch_edit_frame.h>
 #include <sch_plugins/kicad/sch_sexpr_plugin.h>
 #include <sch_line.h>
+#include <sch_junction.h>
+#include <sch_bus_entry.h>
 #include <sch_shape.h>
 #include <sch_painter.h>
 #include <sch_sheet.h>
@@ -1282,7 +1284,23 @@ int SCH_EDITOR_CONTROL::AssignNetclass( const TOOL_EVENT& aEvent )
             getView()->UpdateAllItemsConditionally( KIGFX::REPAINT,
                     []( KIGFX::VIEW_ITEM* aItem ) -> bool
                     {
-                        return dynamic_cast<SCH_LINE*>( aItem );
+                        // Netclass coloured items
+                        //
+                        if( dynamic_cast<SCH_LINE*>( aItem ) )
+                            return true;
+                        else if( dynamic_cast<SCH_JUNCTION*>( aItem ) )
+                            return true;
+                        else if( dynamic_cast<SCH_BUS_ENTRY_BASE*>( aItem ) )
+                            return true;
+
+                        // Items that might reference an item's netclass name
+                        //
+                        EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( aItem );
+
+                        if( text && text->HasTextVars() )
+                            return true;
+
+                        return false;
                     } );
         }
     }

pcbnew/dialogs/dialog_net_inspector.cpp

@@ -2148,8 +2148,15 @@ void DIALOG_NET_INSPECTOR::onDeleteNet( wxCommandEvent& aEvent )
                     m_frame->GetCanvas()->GetView()->UpdateAllItemsConditionally( KIGFX::REPAINT,
                             [removedCode]( KIGFX::VIEW_ITEM* aItem ) -> bool
                             {
-                                if( auto bci = dynamic_cast<BOARD_CONNECTED_ITEM*>( aItem ) )
-                                    return bci->GetNetCode() == removedCode;
+                                auto boardItem = dynamic_cast<BOARD_CONNECTED_ITEM*>( aItem );
+
+                                if( boardItem && boardItem->GetNetCode() == removedCode )
+                                    return true;
+
+                                EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( aItem );
+
+                                if( text && text->HasTextVars() )
+                                    return true;
 
                                 return false;
                             } );

pcbnew/netlist_reader/netlist.cpp

@@ -87,10 +87,31 @@ void PCB_EDIT_FRAME::OnNetlistChanged( BOARD_NETLIST_UPDATER& aUpdater, bool* aR
 
     SetMsgPanel( board );
 
-    // Update rendered tracks and vias net labels
-    // TODO is there a way to extract information about which nets were modified?
-    for( auto track : board->Tracks() )
-        GetCanvas()->GetView()->Update( track );
+    // Update rendered track/via/pad net labels, and any text items that might reference a
+    // netName or netClass
+    int netNamesCfg = GetPcbNewSettings()->m_Display.m_NetNames;
+
+    GetCanvas()->GetView()->UpdateAllItemsConditionally( KIGFX::REPAINT,
+            [&]( KIGFX::VIEW_ITEM* aItem ) -> bool
+            {
+                if( dynamic_cast<PCB_TRACK*>( aItem ) )
+                {
+                    if( netNamesCfg == 2 || netNamesCfg == 3 )
+                        return true;
+                }
+                else if( dynamic_cast<PAD*>( aItem ) )
+                {
+                    if( netNamesCfg == 1 || netNamesCfg == 3 )
+                        return true;
+                }
+
+                EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( aItem );
+
+                if( text && text->HasTextVars() )
+                    return true;
+
+                return false;
+            } );
 
     // Spread new footprints.
     std::vector<FOOTPRINT*> newFootprints = aUpdater.GetAddedFootprints();

pcbnew/pcb_edit_frame.cpp

@@ -1144,25 +1144,27 @@ void PCB_EDIT_FRAME::ShowBoardSetupDialog( const wxString& aInitialPage )
         PCBNEW_SETTINGS* settings = GetPcbNewSettings();
         static LSET      maskAndPasteLayers = LSET( 4, F_Mask, F_Paste, B_Mask, B_Paste );
 
-        bool maskOrPasteVisible = ( GetBoard()->GetVisibleLayers() & maskAndPasteLayers ).any();
-
         GetCanvas()->GetView()->UpdateAllItemsConditionally( KIGFX::REPAINT,
                 [&]( KIGFX::VIEW_ITEM* aItem ) -> bool
                 {
                     if( dynamic_cast<PCB_TRACK*>( aItem ) )
                     {
-                        return settings->m_Display.m_TrackClearance == SHOW_WITH_VIA_ALWAYS;
+                        if( settings->m_Display.m_TrackClearance == SHOW_WITH_VIA_ALWAYS )
+                            return true;
                     }
                     else if( dynamic_cast<PAD*>( aItem ) )
                     {
-                        return settings->m_Display.m_PadClearance || maskOrPasteVisible;
+                        if( settings->m_Display.m_PadClearance )
+                            return true;
+
+                        if( ( GetBoard()->GetVisibleLayers() & maskAndPasteLayers ).any() )
+                            return true;
                     }
-                    else if( dynamic_cast<EDA_TEXT*>( aItem ) )
-                    {
+
                     EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( aItem );
 
-                        return text->HasTextVars();
-                    }
+                    if( text && text->HasTextVars() )
+                        return true;
 
                     return false;
                 } );

pcbnew/tools/board_editor_control.cpp

@@ -302,20 +302,12 @@ int BOARD_EDITOR_CONTROL::PageSettings( const TOOL_EVENT& aEvent )
         m_frame->GetCanvas()->GetView()->UpdateAllItemsConditionally( KIGFX::REPAINT,
                 [&]( KIGFX::VIEW_ITEM* aItem ) -> bool
                 {
-                    BOARD_ITEM* item = dynamic_cast<BOARD_ITEM*>( aItem );
+                    EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( aItem );
+
+                    if( text && text->HasTextVars() )
+                        return true;
 
-                    if( !item )
                     return false;
-
-                    switch( item->Type() )
-                    {
-                    case PCB_TEXT_T:
-                    case PCB_FP_TEXT_T:
-                        return true;        // text variables
-
-                    default:
-                        return false;
-                    }
                 } );
 
         m_frame->OnModify();