Don't prompt for rule areas and no-net shapes

Highlighting and placing vias will pop up a potential net list. This
should not include things without nets

Fixes https://gitlab.com/kicad/code/kicad/-/issues/21381

pcbnew/collectors.cpp

@@ -26,6 +26,7 @@
 #include <board_item.h>             // class BOARD_ITEM
 
 #include <footprint.h>
+#include <netinfo.h>
 #include <pad.h>
 #include <pcb_track.h>
 #include <pcb_marker.h>
@@ -156,6 +157,7 @@ INSPECT_RESULT GENERAL_COLLECTOR::Inspect( EDA_ITEM* aTestItem, void* aTestData
     PCB_FIELD*          field       = nullptr;
     PCB_TEXT*           text        = nullptr;
     PCB_DIMENSION_BASE* dimension   = nullptr;
+    PCB_SHAPE*          shape       = nullptr;
 
     switch( aTestItem->Type() )
     {
@@ -194,13 +196,28 @@ INSPECT_RESULT GENERAL_COLLECTOR::Inspect( EDA_ITEM* aTestItem, void* aTestData
 
     case PCB_ZONE_T:
         zone = static_cast<ZONE*>( aTestItem );
+
+        if( m_Guide->IgnoreNoNets() && zone->GetNetCode() == NETINFO_LIST::UNCONNECTED )
+            return INSPECT_RESULT::CONTINUE;
+
         boardItem = zone;
         break;
 
-    case PCB_TEXTBOX_T:
     case PCB_SHAPE_T:
+        shape = static_cast<PCB_SHAPE*>( aTestItem );
+
+        if( m_Guide->IgnoreNoNets() && shape->GetNetCode() == NETINFO_LIST::UNCONNECTED )
+            return INSPECT_RESULT::CONTINUE;
+
+        boardItem = shape;
+        break;
+
+    case PCB_TEXTBOX_T:
     case PCB_TABLE_T:
     case PCB_TABLECELL_T:
+        if( m_Guide->IgnoreNoNets() )
+            return INSPECT_RESULT::CONTINUE;
+
         boardItem = static_cast<BOARD_ITEM*>( aTestItem );
         break;
 
@@ -209,15 +226,24 @@ INSPECT_RESULT GENERAL_COLLECTOR::Inspect( EDA_ITEM* aTestItem, void* aTestData
     case PCB_DIM_RADIAL_T:
     case PCB_DIM_ORTHOGONAL_T:
     case PCB_DIM_LEADER_T:
+        if( m_Guide->IgnoreNoNets() )
+            return INSPECT_RESULT::CONTINUE;
+
         dimension = static_cast<PCB_DIMENSION_BASE*>( aTestItem );
         boardItem = dimension;
         break;
 
     case PCB_TARGET_T:
+        if( m_Guide->IgnoreNoNets() )
+            return INSPECT_RESULT::CONTINUE;
+
         boardItem = static_cast<BOARD_ITEM*>( aTestItem );
         break;
 
     case PCB_FIELD_T:
+        if( m_Guide->IgnoreNoNets() )
+            return INSPECT_RESULT::CONTINUE;
+
         field = static_cast<PCB_FIELD*>( aTestItem );
 
         if( !field->IsVisible() )
@@ -232,6 +258,9 @@ INSPECT_RESULT GENERAL_COLLECTOR::Inspect( EDA_ITEM* aTestItem, void* aTestData
         KI_FALLTHROUGH;
 
     case PCB_TEXT_T:
+        if( m_Guide->IgnoreNoNets() )
+            return INSPECT_RESULT::CONTINUE;
+
         text = static_cast<PCB_TEXT*>( aTestItem );
         boardItem = text;
 

pcbnew/collectors.h

@@ -155,6 +155,11 @@ public:
      */
     virtual bool IgnoreZoneFills() const = 0;
 
+    /**
+     * @return true if should ignore items with no net.
+     */
+    virtual bool IgnoreNoNets() const = 0;
+
     virtual int Accuracy() const = 0;
 
     virtual double OnePixelInIU() const = 0;
@@ -359,6 +364,7 @@ public:
         m_ignoreMicroVias           = false;
         m_ignoreTracks              = false;
         m_ignoreZoneFills           = true;
+        m_ignoreNoNets              = false;
 
         m_onePixelInIU = abs( aView->ToWorld( one, false ).x );
         m_accuracy = KiROUND( 5 * m_onePixelInIU );
@@ -466,6 +472,9 @@ public:
     bool IgnoreZoneFills() const override { return m_ignoreZoneFills; }
     void SetIgnoreZoneFills( bool ignore ) { m_ignoreZoneFills = ignore; }
 
+    bool IgnoreNoNets() const override { return m_ignoreNoNets; }
+    void SetIgnoreNoNets( bool ignore ) { m_ignoreNoNets = ignore; }
+
     int  Accuracy() const override { return m_accuracy; }
     void SetAccuracy( int aValue ) { m_accuracy = aValue; }
 
@@ -496,6 +505,7 @@ private:
     bool    m_ignoreMicroVias;
     bool    m_ignoreTracks;
     bool    m_ignoreZoneFills;
+    bool    m_ignoreNoNets;
 
     double m_onePixelInIU;
     int    m_accuracy;

pcbnew/tools/board_inspection_tool.cpp

@@ -1788,6 +1788,7 @@ int BOARD_INSPECTION_TOOL::HighlightItem( const TOOL_EVENT& aEvent )
     {
         GENERAL_COLLECTORS_GUIDE guide = m_frame->GetCollectorsGuide();
         guide.SetIgnoreZoneFills( false );
+        guide.SetIgnoreNoNets( true );
 
         PCB_LAYER_ID activeLayer = static_cast<PCB_LAYER_ID>( view()->GetTopLayer() );
         guide.SetPreferredLayer( activeLayer );

pcbnew/tools/drawing_tool.cpp

@@ -3815,6 +3815,9 @@ int DRAWING_TOOL::DrawVia( const TOOL_EVENT& aEvent )
 
             for( ZONE* z : m_board->Zones() )
             {
+                if( z->GetIsRuleArea() )
+                    continue; // ignore rule areas
+
                 for( PCB_LAYER_ID layer : lset )
                 {
                     if( z->IsOnLayer( layer ) )