eeschema: Fix plot line width for negative lines

Negative width lines are used to hide the outline of shapes in eeschema.
Plot should not show these lines.

eeschema/lib_arc.cpp

@@ -302,8 +302,14 @@ void LIB_ARC::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     }
 
     bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
-    aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
-    aPlotter->Arc( pos, -t2, -t1, m_Radius, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    auto pen_size = GetPenSize();
+
+    if( !already_filled || pen_size > 0 )
+    {
+        pen_size = std::max( 0, pen_size );
+        aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
+        aPlotter->Arc( pos, -t2, -t1, m_Radius, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    }
 }
 
 

eeschema/lib_bezier.cpp

@@ -205,8 +205,14 @@ void LIB_BEZIER::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     }
 
     bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
-    aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
-    aPlotter->PlotPoly( cornerList, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    auto pen_size = GetPenSize();
+
+    if( !already_filled || pen_size > 0 )
+    {
+        pen_size = std::max( 0, pen_size );
+        aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
+        aPlotter->PlotPoly( cornerList, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    }
 }
 
 

eeschema/lib_circle.cpp

@@ -157,8 +157,14 @@ void LIB_CIRCLE::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     }
 
     bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
-    aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
-    aPlotter->Circle( pos, m_Radius * 2, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    auto pen_size = GetPenSize();
+
+    if( !already_filled || pen_size > 0 )
+    {
+        pen_size = std::max( 0, pen_size );
+        aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
+        aPlotter->Circle( pos, m_Radius * 2, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    }
 }
 
 

eeschema/lib_polyline.cpp

@@ -163,8 +163,14 @@ void LIB_POLYLINE::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     }
 
     bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
-    aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
-    aPlotter->PlotPoly( cornerList, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    auto pen_size = GetPenSize();
+
+    if( !already_filled || pen_size > 0 )
+    {
+        pen_size = std::max( 0, pen_size );
+        aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
+        aPlotter->PlotPoly( cornerList, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    }
 }
 
 

eeschema/lib_rectangle.cpp

@@ -147,8 +147,14 @@ void LIB_RECTANGLE::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
     }
 
     bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
-    aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
-    aPlotter->Rect( pos, end, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    auto pen_size = GetPenSize();
+
+    if( !already_filled || pen_size > 0 )
+    {
+        pen_size = std::max( 0, pen_size );
+        aPlotter->SetColor( GetLayerColor( LAYER_DEVICE ) );
+        aPlotter->Rect( pos, end, already_filled ? NO_FILL : m_Fill, GetPenSize() );
+    }
 }