Don't generate -1 width non-filled splines.

They serve no purpose, and will get replaced with
default-line-width non-filled splines.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/20138

common/import_gfx/graphics_importer_buffer.h

@@ -201,7 +201,9 @@ public:
     IMPORTED_POLYGON( const std::vector<VECTOR2D>& aVertices, const IMPORTED_STROKE& aStroke,
                       bool aFilled, const COLOR4D& aFillColor ) :
             m_vertices( aVertices ),
-            m_stroke( aStroke ), m_filled( aFilled ), m_fillColor( aFillColor )
+            m_stroke( aStroke ),
+            m_filled( aFilled ),
+            m_fillColor( aFillColor )
     {
     }
 

common/import_gfx/svg_import_plugin.cpp

@@ -195,8 +195,12 @@ bool SVG_IMPORT_PLUGIN::Import()
                 // *not* closed so create a filled, closed shape for the fill, and an unfilled,
                 // open shape for the outline
                 static IMPORTED_STROKE noStroke( -1, LINE_STYLE::SOLID, COLOR4D::UNSPECIFIED );
-                DrawPath( path->pts, path->npts, true, noStroke, true, fillColor );
-                DrawPath( path->pts, path->npts, false, stroke, false, COLOR4D::UNSPECIFIED );
+                const bool             closed = true;
+
+                DrawPath( path->pts, path->npts, closed, noStroke, true, fillColor );
+
+                if( stroke.GetWidth() > 0 )
+                    DrawPath( path->pts, path->npts, !closed, stroke, false, COLOR4D::UNSPECIFIED );
             }
             else
             {

eeschema/import_gfx/graphics_importer_lib_symbol.cpp

@@ -64,10 +64,10 @@ int GRAPHICS_IMPORTER_LIB_SYMBOL::MapLineWidth( double aLineWidth )
 
 STROKE_PARAMS GRAPHICS_IMPORTER_LIB_SYMBOL::MapStrokeParams( const IMPORTED_STROKE& aStroke )
 {
-    double width = aStroke.GetWidth();
+    // Historicaly -1 meant no-stroke in Eeschema.
+    int width = ( aStroke.GetWidth() == -1 ) ? -1 : MapLineWidth( aStroke.GetWidth() );
 
-    return STROKE_PARAMS( width != -1 ? MapLineWidth( width ) : -1, aStroke.GetPlotStyle(),
-                          aStroke.GetColor() );
+    return STROKE_PARAMS( width, aStroke.GetPlotStyle(), aStroke.GetColor() );
 }
 
 

eeschema/import_gfx/graphics_importer_sch.cpp

@@ -65,10 +65,10 @@ int GRAPHICS_IMPORTER_SCH::MapLineWidth( double aLineWidth )
 
 STROKE_PARAMS GRAPHICS_IMPORTER_SCH::MapStrokeParams( const IMPORTED_STROKE& aStroke )
 {
-    double width = aStroke.GetWidth();
+    // Historicaly -1 meant no-stroke in Eeschema.
+    int width = ( aStroke.GetWidth() == -1 ) ? -1 : MapLineWidth( aStroke.GetWidth() );
 
-    return STROKE_PARAMS( width != -1 ? MapLineWidth( width ) : -1, aStroke.GetPlotStyle(),
-                          aStroke.GetColor() );
+    return STROKE_PARAMS( width, aStroke.GetPlotStyle(), aStroke.GetColor() );
 }
 
 

pcbnew/import_gfx/graphics_importer_pcbnew.cpp

@@ -67,10 +67,12 @@ int GRAPHICS_IMPORTER_PCBNEW::MapLineWidth( double aLineWidth )
 
 STROKE_PARAMS GRAPHICS_IMPORTER_PCBNEW::MapStrokeParams( const IMPORTED_STROKE& aStroke )
 {
-    double width = aStroke.GetWidth();
+    // Historicaly -1 meant no-stroke in Eeschema, but this has never been the case for
+    // PCBNew.  (The importer, which doesn't know which program it's creating content for,
+    // also uses -1 for no-stroke.)
+    int width = ( aStroke.GetWidth() == -1 ) ? 0 : MapLineWidth( aStroke.GetWidth() );
 
-    return STROKE_PARAMS( width != -1 ? MapLineWidth( width ) : -1, aStroke.GetPlotStyle(),
-                          aStroke.GetColor() );
+    return STROKE_PARAMS( width, aStroke.GetPlotStyle(), aStroke.GetColor() );
 }
 
 

pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp

@@ -3030,7 +3030,7 @@ PCB_SHAPE* PCB_IO_KICAD_SEXPR_PARSER::parsePCB_SHAPE( BOARD_ITEM* aParent )
     case T_gr_vector:
     case T_gr_line:
     case T_fp_line:
-        // Default PCB_SHAPE type is S_SEGMENT.
+        shape->SetShape( SHAPE_T::SEGMENT );
         token = NextTok();
 
         if( token == T_locked )
@@ -3094,7 +3094,15 @@ PCB_SHAPE* PCB_IO_KICAD_SEXPR_PARSER::parsePCB_SHAPE( BOARD_ITEM* aParent )
     }
 
     default:
-        Expecting( "gr_arc, gr_circle, gr_curve, gr_line, gr_poly, gr_rect or gr_bbox" );
+        if( aParent && aParent->Type() == PCB_FOOTPRINT_T )
+        {
+            Expecting( "fp_arc, fp_circle, fp_curve, fp_line, fp_poly or fp_rect" );
+        }
+        else
+        {
+            Expecting( "gr_arc, gr_circle, gr_curve, gr_vector, gr_line, gr_poly, gr_rect or "
+                       "gr_bbox" );
+        }
     }
 
     bool foundFill = false;
@@ -3159,8 +3167,8 @@ PCB_SHAPE* PCB_IO_KICAD_SEXPR_PARSER::parsePCB_SHAPE( BOARD_ITEM* aParent )
 
                 switch( token )
                 {
-                // T_yes was used to indicate filling when first introduced,
-                // so treat it like a solid fill since that was the only fill available
+                // T_yes was used to indicate filling when first introduced, so treat it like a
+                // solid fill since that was the only fill available at the time.
                 case T_yes:
                 case T_solid:         shape->SetFillMode( FILL_T::FILLED_SHAPE );  break;
 
@@ -3177,19 +3185,15 @@ PCB_SHAPE* PCB_IO_KICAD_SEXPR_PARSER::parsePCB_SHAPE( BOARD_ITEM* aParent )
 
             break;
 
-        // We continue to parse the status field but it is no longer written
-        case T_status:
+        case T_status:      // legacy token; ignore value
             parseHex();
             NeedRIGHT();
             break;
 
-        // Handle (locked) from 5.99 development, and (locked yes) from modern times
+        // Handle "(locked)" from 5.99 development, and "(locked yes)" from modern times
         case T_locked:
-        {
-            bool locked = parseMaybeAbsentBool( true );
-            shape->SetLocked( locked );
+            shape->SetLocked( parseMaybeAbsentBool( true ) );
             break;
-        }
 
         case T_net:
             if( !shape->SetNetCode( getNetCode( parseInt( "net number" ) ), /* aNoAssert */ true ) )
@@ -3197,6 +3201,7 @@ PCB_SHAPE* PCB_IO_KICAD_SEXPR_PARSER::parsePCB_SHAPE( BOARD_ITEM* aParent )
                 wxLogError( _( "Invalid net ID in\nfile: '%s'\nline: %d\noffset: %d." ),
                             CurSource(), CurLineNumber(), CurOffset() );
             }
+
             NeedRIGHT();
             break;