kicad/pcbnew/pcb_shape.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 2011 Wayne Stambaugh <stambaughw@gmail.com>
 * Copyright (C) 1992-2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <google/protobuf/any.pb.h>
#include <magic_enum.hpp>

#include <bitmaps.h>
#include <core/mirror.h>
#include <macros.h>
#include <pcb_edit_frame.h>
#include <board_design_settings.h>
#include <footprint.h>
#include <pad.h>
#include <base_units.h>
#include <geometry/shape_compound.h>
#include <pcb_shape.h>
#include <pcb_painter.h>
#include <api/board/board_types.pb.h>
#include <api/api_enums.h>
#include <api/api_utils.h>


PCB_SHAPE::PCB_SHAPE( BOARD_ITEM* aParent, KICAD_T aItemType, SHAPE_T aShapeType ) :
    BOARD_CONNECTED_ITEM( aParent, aItemType ),
    EDA_SHAPE( aShapeType, pcbIUScale.mmToIU( DEFAULT_LINE_WIDTH ), FILL_T::NO_FILL )
{
}


PCB_SHAPE::PCB_SHAPE( BOARD_ITEM* aParent, SHAPE_T shapetype ) :
    BOARD_CONNECTED_ITEM( aParent, PCB_SHAPE_T ),
    EDA_SHAPE( shapetype, pcbIUScale.mmToIU( DEFAULT_LINE_WIDTH ), FILL_T::NO_FILL )
{
}


PCB_SHAPE::~PCB_SHAPE()
{
}

// TODO: lift out
kiapi::common::types::PolyLine lineChainToProto( const SHAPE_LINE_CHAIN& aSlc )
{
    kiapi::common::types::PolyLine msg;

    for( int vertex = 0; vertex < aSlc.PointCount(); vertex = aSlc.NextShape( vertex ) )
    {
        kiapi::common::types::PolyLineNode* node = msg.mutable_nodes()->Add();

        if( aSlc.IsPtOnArc( vertex ) )
        {
            const SHAPE_ARC& arc = aSlc.Arc( aSlc.ArcIndex( vertex ) );
            node->mutable_arc()->mutable_start()->set_x_nm( arc.GetP0().x );
            node->mutable_arc()->mutable_start()->set_y_nm( arc.GetP0().y );
            node->mutable_arc()->mutable_mid()->set_x_nm( arc.GetArcMid().x );
            node->mutable_arc()->mutable_mid()->set_y_nm( arc.GetArcMid().y );
            node->mutable_arc()->mutable_end()->set_x_nm( arc.GetP1().x );
            node->mutable_arc()->mutable_end()->set_y_nm( arc.GetP1().y );
        }
        else
        {
            node->mutable_point()->set_x_nm( aSlc.CPoint( vertex ).x );
            node->mutable_point()->set_y_nm( aSlc.CPoint( vertex ).y );
        }
    }

    msg.set_closed( aSlc.IsClosed() );

    return msg;
}


void PCB_SHAPE::Serialize( google::protobuf::Any &aContainer ) const
{
    kiapi::board::types::GraphicShape msg;

    msg.mutable_id()->set_value( m_Uuid.AsStdString() );
    msg.set_layer( ToProtoEnum<PCB_LAYER_ID, kiapi::board::types::BoardLayer>( GetLayer() ) );
    msg.set_locked( IsLocked() ? kiapi::common::types::LockedState::LS_LOCKED
                               : kiapi::common::types::LockedState::LS_UNLOCKED );
    msg.mutable_net()->mutable_code()->set_value( GetNetCode() );
    msg.mutable_net()->set_name( GetNetname() );

    kiapi::common::types::StrokeAttributes* stroke
            = msg.mutable_attributes()->mutable_stroke();
    kiapi::common::types::GraphicFillAttributes* fill = msg.mutable_attributes()->mutable_fill();

    stroke->mutable_width()->set_value_nm( GetWidth() );

    switch( GetLineStyle() )
    {
    case LINE_STYLE::DEFAULT:    stroke->set_style( kiapi::common::types::SLS_DEFAULT ); break;
    case LINE_STYLE::SOLID:      stroke->set_style( kiapi::common::types::SLS_SOLID ); break;
    case LINE_STYLE::DASH:       stroke->set_style( kiapi::common::types::SLS_DASH ); break;
    case LINE_STYLE::DOT:        stroke->set_style( kiapi::common::types::SLS_DOT ); break;
    case LINE_STYLE::DASHDOT:    stroke->set_style( kiapi::common::types::SLS_DASHDOT ); break;
    case LINE_STYLE::DASHDOTDOT: stroke->set_style( kiapi::common::types::SLS_DASHDOTDOT ); break;
    default: break;
    }

    switch( GetFillMode() )
    {
    case FILL_T::FILLED_SHAPE: fill->set_fill_type( kiapi::common::types::GFT_FILLED ); break;
    default:                   fill->set_fill_type( kiapi::common::types::GFT_UNFILLED ); break;
    }

    switch( GetShape() )
    {
    case SHAPE_T::SEGMENT:
    {
        kiapi::board::types::GraphicSegmentAttributes* segment = msg.mutable_segment();
        kiapi::common::PackVector2( *segment->mutable_start(), GetStart() );
        kiapi::common::PackVector2( *segment->mutable_end(), GetEnd() );
        break;
    }

    case SHAPE_T::RECTANGLE:
    {
        kiapi::board::types::GraphicRectangleAttributes* rectangle = msg.mutable_rectangle();
        kiapi::common::PackVector2( *rectangle->mutable_top_left(), GetStart() );
        kiapi::common::PackVector2( *rectangle->mutable_bottom_right(), GetEnd() );
        break;
    }

    case SHAPE_T::ARC:
    {
        kiapi::board::types::GraphicArcAttributes* arc = msg.mutable_arc();
        kiapi::common::PackVector2( *arc->mutable_start(), GetStart() );
        kiapi::common::PackVector2( *arc->mutable_mid(), GetArcMid() );
        kiapi::common::PackVector2( *arc->mutable_end(), GetEnd() );
        break;
    }

    case SHAPE_T::CIRCLE:
    {
        kiapi::board::types::GraphicCircleAttributes* circle = msg.mutable_circle();
        kiapi::common::PackVector2( *circle->mutable_center(), GetStart() );
        kiapi::common::PackVector2( *circle->mutable_radius_point(), GetEnd() );
        break;
    }

    case SHAPE_T::POLY:
    {
        kiapi::common::types::PolySet* polyset = msg.mutable_polygon();

        for( int idx = 0; idx < GetPolyShape().OutlineCount(); ++idx )
        {
            const SHAPE_POLY_SET::POLYGON& poly = GetPolyShape().Polygon( idx );

            if( poly.empty() )
                continue;

            kiapi::common::types::PolygonWithHoles* polyMsg = polyset->mutable_polygons()->Add();
            polyMsg->mutable_outline()->CopyFrom( lineChainToProto( poly.front() ) );

            if( poly.size() > 1 )
            {
                for( size_t hole = 1; hole < poly.size(); ++hole )
                    polyMsg->mutable_holes()->Add( lineChainToProto( poly[hole] ) );
            }
        }
        break;
    }

    case SHAPE_T::BEZIER:
    {
        kiapi::board::types::GraphicBezierAttributes* bezier = msg.mutable_bezier();
        kiapi::common::PackVector2( *bezier->mutable_start(), GetStart() );
        kiapi::common::PackVector2( *bezier->mutable_control1(), GetBezierC1() );
        kiapi::common::PackVector2( *bezier->mutable_control2(), GetBezierC2() );
        kiapi::common::PackVector2( *bezier->mutable_end(), GetEnd() );
        break;
    }

    default:
        wxASSERT_MSG( false, "Unhandled shape in PCB_SHAPE::Serialize" );
    }

    aContainer.PackFrom( msg );
}


// TODO(JE) lift out
SHAPE_LINE_CHAIN lineChainFromProto( const kiapi::common::types::PolyLine& aProto )
{
    SHAPE_LINE_CHAIN slc;

    for( const kiapi::common::types::PolyLineNode& node : aProto.nodes() )
    {
        if( node.has_point() )
        {
            slc.Append( VECTOR2I( node.point().x_nm(), node.point().y_nm() ) );
        }
        else if( node.has_arc() )
        {
            slc.Append( SHAPE_ARC( VECTOR2I( node.arc().start().x_nm(), node.arc().start().y_nm() ),
                                   VECTOR2I( node.arc().mid().x_nm(), node.arc().mid().y_nm() ),
                                   VECTOR2I( node.arc().end().x_nm(), node.arc().end().y_nm() ),
                                   0 /* don't care about width here */ ) );
        }
    }

    slc.SetClosed( aProto.closed() );

    return slc;
}


bool PCB_SHAPE::Deserialize( const google::protobuf::Any &aContainer )
{
    kiapi::board::types::GraphicShape msg;

    if( !aContainer.UnpackTo( &msg ) )
        return false;

    // Initialize everything to a known state that doesn't get touched by every
    // codepath below, to make sure the equality operator is consistent
    m_start = {};
    m_end = {};
    m_arcCenter = {};
    m_arcMidData = {};
    m_bezierC1 = {};
    m_bezierC2 = {};
    m_editState = 0;
    m_proxyItem = false;
    m_endsSwapped = false;

    const_cast<KIID&>( m_Uuid ) = KIID( msg.id().value() );
    SetLocked( msg.locked() == kiapi::common::types::LS_LOCKED );
    SetLayer( FromProtoEnum<PCB_LAYER_ID, kiapi::board::types::BoardLayer>( msg.layer() ) );
    SetNetCode( msg.net().code().value() );

    SetFilled( msg.attributes().fill().fill_type() == kiapi::common::types::GFT_FILLED );
    SetWidth( msg.attributes().stroke().width().value_nm() );

    switch( msg.attributes().stroke().style() )
    {
    case kiapi::common::types::SLS_DEFAULT:    SetLineStyle( LINE_STYLE::DEFAULT );    break;
    case kiapi::common::types::SLS_SOLID:      SetLineStyle( LINE_STYLE::SOLID );      break;
    case kiapi::common::types::SLS_DASH:       SetLineStyle( LINE_STYLE::DASH );       break;
    case kiapi::common::types::SLS_DOT:        SetLineStyle( LINE_STYLE::DOT );        break;
    case kiapi::common::types::SLS_DASHDOT:    SetLineStyle( LINE_STYLE::DASHDOT );    break;
    case kiapi::common::types::SLS_DASHDOTDOT: SetLineStyle( LINE_STYLE::DASHDOTDOT ); break;
    default: break;
    }

    if( msg.has_segment() )
    {
        SetShape( SHAPE_T::SEGMENT );
        SetStart( kiapi::common::UnpackVector2( msg.segment().start() ) );
        SetEnd( kiapi::common::UnpackVector2( msg.segment().end() ) );
    }
    else if( msg.has_rectangle() )
    {
        SetShape( SHAPE_T::RECTANGLE );
        SetStart( kiapi::common::UnpackVector2( msg.rectangle().top_left() ) );
        SetEnd( kiapi::common::UnpackVector2( msg.rectangle().bottom_right() ) );
    }
    else if( msg.has_arc() )
    {
        SetShape( SHAPE_T::ARC );
        SetArcGeometry( kiapi::common::UnpackVector2( msg.arc().start() ),
                        kiapi::common::UnpackVector2( msg.arc().mid() ),
                        kiapi::common::UnpackVector2( msg.arc().end() ) );
    }
    else if( msg.has_circle() )
    {
        SetShape( SHAPE_T::CIRCLE );
        SetStart( kiapi::common::UnpackVector2( msg.circle().center() ) );
        SetEnd( kiapi::common::UnpackVector2( msg.circle().radius_point() ) );
    }
    else if( msg.has_polygon() )
    {
        SetShape( SHAPE_T::POLY );
        const auto& polyMsg = msg.polygon().polygons();

        SHAPE_POLY_SET sps;

        for( const kiapi::common::types::PolygonWithHoles& polygonWithHoles : polyMsg )
        {
            SHAPE_POLY_SET::POLYGON polygon;

            polygon.emplace_back( lineChainFromProto( polygonWithHoles.outline() ) );

            for( const kiapi::common::types::PolyLine& holeMsg : polygonWithHoles.holes() )
                polygon.emplace_back( lineChainFromProto( holeMsg ) );

            sps.AddPolygon( polygon );
        }

        SetPolyShape( sps );
    }
    else if( msg.has_bezier() )
    {
        SetShape( SHAPE_T::BEZIER );
        SetStart( kiapi::common::UnpackVector2( msg.bezier().start() ) );
        SetBezierC1( kiapi::common::UnpackVector2( msg.bezier().control1() ) );
        SetBezierC2( kiapi::common::UnpackVector2( msg.bezier().control2() ) );
        SetEnd( kiapi::common::UnpackVector2( msg.bezier().end() ) );
    }

    return true;
}


bool PCB_SHAPE::IsType( const std::vector<KICAD_T>& aScanTypes ) const
{
    if( BOARD_ITEM::IsType( aScanTypes ) )
        return true;

    bool sametype = false;

    for( KICAD_T scanType : aScanTypes )
    {
        if( scanType == PCB_LOCATE_BOARD_EDGE_T )
            sametype = m_layer == Edge_Cuts;
        else if( scanType == PCB_SHAPE_LOCATE_ARC_T )
            sametype = m_shape == SHAPE_T::ARC;
        else if( scanType == PCB_SHAPE_LOCATE_CIRCLE_T )
            sametype = m_shape == SHAPE_T::CIRCLE;
        else if( scanType == PCB_SHAPE_LOCATE_RECT_T )
            sametype = m_shape == SHAPE_T::RECTANGLE;
        else if( scanType == PCB_SHAPE_LOCATE_SEGMENT_T )
            sametype = m_shape == SHAPE_T::SEGMENT;
        else if( scanType == PCB_SHAPE_LOCATE_POLY_T )
            sametype = m_shape == SHAPE_T::POLY;
        else if( scanType == PCB_SHAPE_LOCATE_BEZIER_T )
            sametype = m_shape == SHAPE_T::BEZIER;

        if( sametype )
            return true;
    }

    return false;
}


bool PCB_SHAPE::IsConnected() const
{
    // Only board-level copper shapes are connectable
    return IsOnCopperLayer() && !GetParentFootprint();
}


void PCB_SHAPE::SetLayer( PCB_LAYER_ID aLayer )
{
    BOARD_ITEM::SetLayer( aLayer );

    if( !IsOnCopperLayer() )
        SetNetCode( -1 );
}


std::vector<VECTOR2I> PCB_SHAPE::GetConnectionPoints() const
{
    std::vector<VECTOR2I> ret;

    // For filled shapes, we may as well use a centroid
    if( IsFilled() )
    {
        ret.emplace_back( GetCenter() );
        return ret;
    }

    switch( m_shape )
    {
    case SHAPE_T::ARC:
        ret.emplace_back( GetArcMid() );
        KI_FALLTHROUGH;

    case SHAPE_T::SEGMENT:
    case SHAPE_T::BEZIER:
        ret.emplace_back( GetStart() );
        ret.emplace_back( GetEnd() );
        break;

    case SHAPE_T::POLY:
        for( auto iter = GetPolyShape().CIterate(); iter; ++iter )
            ret.emplace_back( *iter );

        break;

    case SHAPE_T::RECTANGLE:
        for( const VECTOR2I& pt : GetRectCorners() )
            ret.emplace_back( pt );

        break;

    default:
        break;
    }

    return ret;
}


int PCB_SHAPE::GetWidth() const
{
    // A stroke width of 0 in PCBNew means no-border, but negative stroke-widths are only used
    // in EEschema (see SCH_SHAPE::GetPenWidth()).
    // Since negative stroke widths can trip up down-stream code (such as the Gerber plotter), we
    // weed them out here.
    return std::max( EDA_SHAPE::GetWidth(), 0 );
}


void PCB_SHAPE::StyleFromSettings( const BOARD_DESIGN_SETTINGS& settings )
{
    m_stroke.SetWidth( settings.GetLineThickness( GetLayer() ) );
}


const VECTOR2I PCB_SHAPE::GetFocusPosition() const
{
    // For some shapes return the visual center, but for not filled polygonal shapes,
    // the center is usually far from the shape: a point on the outline is better

    switch( m_shape )
    {
    case SHAPE_T::CIRCLE:
        if( !IsFilled() )
            return VECTOR2I( GetCenter().x + GetRadius(), GetCenter().y );
        else
            return GetCenter();

    case SHAPE_T::RECTANGLE:
        if( !IsFilled() )
            return GetStart();
        else
            return GetCenter();

    case SHAPE_T::POLY:
        if( !IsFilled() )
        {
            VECTOR2I pos = GetPolyShape().Outline(0).CPoint(0);
            return VECTOR2I( pos.x, pos.y );
        }
        else
        {
            return GetCenter();
        }

    case SHAPE_T::ARC:
        return GetArcMid();

    case SHAPE_T::BEZIER:
        return GetStart();

    default:
        return GetCenter();
    }
}


std::vector<VECTOR2I> PCB_SHAPE::GetCorners() const
{
    std::vector<VECTOR2I> pts;

    if( GetShape() == SHAPE_T::RECTANGLE )
    {
        pts = GetRectCorners();
    }
    else if( GetShape() == SHAPE_T::POLY )
    {
        for( int ii = 0; ii < GetPolyShape().OutlineCount(); ++ii )
        {
            for( const VECTOR2I& pt : GetPolyShape().Outline( ii ).CPoints() )
                pts.emplace_back( pt );
        }
    }
    else
    {
        UNIMPLEMENTED_FOR( SHAPE_T_asString() );
    }

    while( pts.size() < 4 )
        pts.emplace_back( pts.back() + VECTOR2I( 10, 10 ) );

    return pts;
}


void PCB_SHAPE::Move( const VECTOR2I& aMoveVector )
{
    move( aMoveVector );
}


void PCB_SHAPE::Scale( double aScale )
{
    scale( aScale );
}


void PCB_SHAPE::Normalize()
{
    if( m_shape == SHAPE_T::RECTANGLE )
    {
        VECTOR2I start = GetStart();
        VECTOR2I end = GetEnd();

        BOX2I rect( start, end - start );
        rect.Normalize();

        SetStart( rect.GetPosition() );
        SetEnd( rect.GetEnd() );
    }
    else if( m_shape == SHAPE_T::POLY )
    {
        auto horizontal =
                []( const SEG& seg )
                {
                    return seg.A.y == seg.B.y;
                };

        auto vertical =
                []( const SEG& seg )
                {
                    return seg.A.x == seg.B.x;
                };

        // Convert a poly back to a rectangle if appropriate
        if( m_poly.OutlineCount() == 1 && m_poly.Outline( 0 ).SegmentCount() == 4 )
        {
            SHAPE_LINE_CHAIN& outline = m_poly.Outline( 0 );

            if( horizontal( outline.Segment( 0 ) )
                && vertical( outline.Segment( 1 ) )
                && horizontal( outline.Segment( 2 ) )
                && vertical( outline.Segment( 3 ) ) )
            {
                m_shape = SHAPE_T::RECTANGLE;
                m_start.x = std::min( outline.Segment( 0 ).A.x, outline.Segment( 0 ).B.x );
                m_start.y = std::min( outline.Segment( 1 ).A.y, outline.Segment( 1 ).B.y );
                m_end.x = std::max( outline.Segment( 0 ).A.x, outline.Segment( 0 ).B.x );
                m_end.y = std::max( outline.Segment( 1 ).A.y, outline.Segment( 1 ).B.y );
            }
            else if( vertical( outline.Segment( 0 ) )
                  && horizontal( outline.Segment( 1 ) )
                  && vertical( outline.Segment( 2 ) )
                  && horizontal( outline.Segment( 3 ) ) )
            {
                m_shape = SHAPE_T::RECTANGLE;
                m_start.x = std::min( outline.Segment( 1 ).A.x, outline.Segment( 1 ).B.x );
                m_start.y = std::min( outline.Segment( 0 ).A.y, outline.Segment( 0 ).B.y );
                m_end.x = std::max( outline.Segment( 1 ).A.x, outline.Segment( 1 ).B.x );
                m_end.y = std::max( outline.Segment( 0 ).A.y, outline.Segment( 0 ).B.y );
            }
        }
    }
}


void PCB_SHAPE::Rotate( const VECTOR2I& aRotCentre, const EDA_ANGLE& aAngle )
{
    rotate( aRotCentre, aAngle );
}


void PCB_SHAPE::Flip( const VECTOR2I& aCentre, bool aFlipLeftRight )
{
    flip( aCentre, aFlipLeftRight );

    SetLayer( FlipLayer( GetLayer(), GetBoard()->GetCopperLayerCount() ) );
}


void PCB_SHAPE::Mirror( const VECTOR2I& aCentre, bool aMirrorAroundXAxis )
{
    // Mirror an edge of the footprint. the layer is not modified
    // This is a footprint shape modification.

    switch( GetShape() )
    {
    case SHAPE_T::ARC:
    case SHAPE_T::SEGMENT:
    case SHAPE_T::RECTANGLE:
    case SHAPE_T::CIRCLE:
    case SHAPE_T::BEZIER:
        if( aMirrorAroundXAxis )
        {
            MIRROR( m_start.y, aCentre.y );
            MIRROR( m_end.y, aCentre.y );
            MIRROR( m_arcCenter.y, aCentre.y );
            MIRROR( m_bezierC1.y, aCentre.y );
            MIRROR( m_bezierC2.y, aCentre.y );
        }
        else
        {
            MIRROR( m_start.x, aCentre.x );
            MIRROR( m_end.x, aCentre.x );
            MIRROR( m_arcCenter.x, aCentre.x );
            MIRROR( m_bezierC1.x, aCentre.x );
            MIRROR( m_bezierC2.x, aCentre.x );
        }

        if( GetShape() == SHAPE_T::ARC )
            std::swap( m_start, m_end );

        if( GetShape() == SHAPE_T::BEZIER )
            RebuildBezierToSegmentsPointsList( GetWidth() );

        break;

    case SHAPE_T::POLY:
        m_poly.Mirror( !aMirrorAroundXAxis, aMirrorAroundXAxis, aCentre );
        break;

    default:
        UNIMPLEMENTED_FOR( SHAPE_T_asString() );
    }
}


void PCB_SHAPE::SetIsProxyItem( bool aIsProxy )
{
    PAD* parentPad = nullptr;

    if( GetBoard() && GetBoard()->IsFootprintHolder() )
    {
        for( FOOTPRINT* fp : GetBoard()->Footprints() )
        {
            for( PAD* pad : fp->Pads() )
            {
                if( pad->IsEntered() )
                {
                    parentPad = pad;
                    break;
                }
            }
        }
    }

    if( aIsProxy && !m_proxyItem )
    {
        if( GetShape() == SHAPE_T::SEGMENT )
        {
            if( parentPad && parentPad->GetThermalSpokeWidth() )
                SetWidth( parentPad->GetThermalSpokeWidth() );
            else
                SetWidth( pcbIUScale.mmToIU( ZONE_THERMAL_RELIEF_COPPER_WIDTH_MM ) );
        }
        else
        {
            SetWidth( 1 );
        }
    }
    else if( m_proxyItem && !aIsProxy )
    {
        SetWidth( pcbIUScale.mmToIU( DEFAULT_LINE_WIDTH ) );
    }

    m_proxyItem = aIsProxy;
}


double PCB_SHAPE::ViewGetLOD( int aLayer, KIGFX::VIEW* aView ) const
{
    constexpr double HIDE = std::numeric_limits<double>::max();
    constexpr double SHOW = 0.0;

    KIGFX::PCB_PAINTER*  painter = static_cast<KIGFX::PCB_PAINTER*>( aView->GetPainter() );
    KIGFX::PCB_RENDER_SETTINGS* renderSettings = painter->GetSettings();

    if( aLayer == LAYER_LOCKED_ITEM_SHADOW )
    {
        // Hide shadow if the main layer is not shown
        if( !aView->IsLayerVisible( m_layer ) )
            return HIDE;

        // Hide shadow on dimmed tracks
        if( renderSettings->GetHighContrast() )
        {
            if( m_layer != renderSettings->GetPrimaryHighContrastLayer() )
                return HIDE;
        }
    }

    if( FOOTPRINT* parent = GetParentFootprint() )
    {
        if( parent->GetLayer() == F_Cu && !aView->IsLayerVisible( LAYER_FOOTPRINTS_FR ) )
            return HIDE;

        if( parent->GetLayer() == B_Cu && !aView->IsLayerVisible( LAYER_FOOTPRINTS_BK ) )
            return HIDE;
    }

    return SHOW;
}


void PCB_SHAPE::ViewGetLayers( int aLayers[], int& aCount ) const
{
    aLayers[0] = GetLayer();

    if( IsOnCopperLayer() )
    {
        aLayers[1] = GetNetnameLayer( aLayers[0] );
        aCount = 2;
    }
    else
    {
        aCount = 1;
    }

    if( IsLocked() )
        aLayers[ aCount++ ] = LAYER_LOCKED_ITEM_SHADOW;
}


void PCB_SHAPE::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList )
{
    if( aFrame->GetName() == PCB_EDIT_FRAME_NAME )
    {
        if( FOOTPRINT* parent = GetParentFootprint() )
            aList.emplace_back( _( "Footprint" ), parent->GetReference() );
    }

    aList.emplace_back( _( "Type" ), _( "Drawing" ) );

    if( aFrame->GetName() == PCB_EDIT_FRAME_NAME && IsLocked() )
        aList.emplace_back( _( "Status" ), _( "Locked" ) );

    ShapeGetMsgPanelInfo( aFrame, aList );

    aList.emplace_back( _( "Layer" ), GetLayerName() );
}


wxString PCB_SHAPE::GetItemDescription( UNITS_PROVIDER* aUnitsProvider ) const
{
    if( GetNetCode() > 0 )
    {
        return wxString::Format( _( "%s %s on %s" ), GetFriendlyName(), GetNetnameMsg(),
                                 GetLayerName() );
    }
    else
    {
        return wxString::Format( _( "%s on %s" ), GetFriendlyName(), GetLayerName() );
    }
}


BITMAPS PCB_SHAPE::GetMenuImage() const
{
    if( GetParentFootprint() )
        return BITMAPS::show_mod_edge;
    else
        return BITMAPS::add_dashed_line;
}


EDA_ITEM* PCB_SHAPE::Clone() const
{
    return new PCB_SHAPE( *this );
}


const BOX2I PCB_SHAPE::ViewBBox() const
{
    BOX2I return_box = EDA_ITEM::ViewBBox();

    // Inflate the bounding box by just a bit more for safety.
    return_box.Inflate( GetWidth() );

    return return_box;
}


std::shared_ptr<SHAPE> PCB_SHAPE::GetEffectiveShape( PCB_LAYER_ID aLayer, FLASHING aFlash ) const
{
    return std::make_shared<SHAPE_COMPOUND>( MakeEffectiveShapes() );
}


void PCB_SHAPE::swapData( BOARD_ITEM* aImage )
{
    PCB_SHAPE* image = dynamic_cast<PCB_SHAPE*>( aImage );
    wxCHECK( image, /* void */ );

    SwapShape( image );

    // Swap params not handled by SwapShape( image )
    std::swap( m_layer, image->m_layer );
    std::swap( m_isKnockout, image->m_isKnockout );
    std::swap( m_isLocked, image->m_isLocked );
    std::swap( m_flags, image->m_flags );
    std::swap( m_parent, image->m_parent );
    std::swap( m_forceVisible, image->m_forceVisible );
    std::swap( m_netinfo, image->m_netinfo );
}


bool PCB_SHAPE::cmp_drawings::operator()( const BOARD_ITEM* aFirst,
                                          const BOARD_ITEM* aSecond ) const
{
    if( aFirst->Type() != aSecond->Type() )
        return aFirst->Type() < aSecond->Type();

    if( aFirst->GetLayer() != aSecond->GetLayer() )
        return aFirst->GetLayer() < aSecond->GetLayer();

    if( aFirst->Type() == PCB_SHAPE_T )
    {
        const PCB_SHAPE* dwgA = static_cast<const PCB_SHAPE*>( aFirst );
        const PCB_SHAPE* dwgB = static_cast<const PCB_SHAPE*>( aSecond );

        if( dwgA->GetShape() != dwgB->GetShape() )
            return dwgA->GetShape() < dwgB->GetShape();
    }

    return aFirst->m_Uuid < aSecond->m_Uuid;
}


void PCB_SHAPE::TransformShapeToPolygon( SHAPE_POLY_SET& aBuffer, PCB_LAYER_ID aLayer,
                                         int aClearance, int aError, ERROR_LOC aErrorLoc,
                                         bool ignoreLineWidth ) const
{
    EDA_SHAPE::TransformShapeToPolygon( aBuffer, aClearance, aError, aErrorLoc, ignoreLineWidth );
}


bool PCB_SHAPE::operator==( const BOARD_ITEM& aOther ) const
{
    if( aOther.Type() != Type() )
        return false;

    const PCB_SHAPE& other = static_cast<const PCB_SHAPE&>( aOther );

    if( m_layer != other.m_layer )
        return false;

    if( m_isKnockout != other.m_isKnockout )
        return false;

    if( m_isLocked != other.m_isLocked )
        return false;

    if( m_flags != other.m_flags )
        return false;

    if( m_forceVisible != other.m_forceVisible )
        return false;

    if( m_netinfo->GetNetCode() != other.m_netinfo->GetNetCode() )
        return false;

    return EDA_SHAPE::operator==( other );
}


double PCB_SHAPE::Similarity( const BOARD_ITEM& aOther ) const
{
    if( aOther.Type() != Type() )
        return 0.0;

    const PCB_SHAPE& other = static_cast<const PCB_SHAPE&>( aOther );

    double similarity = 1.0;

    if( GetLayer() != other.GetLayer() )
        similarity *= 0.9;

    if( m_isKnockout != other.m_isKnockout )
        similarity *= 0.9;

    if( m_isLocked != other.m_isLocked )
        similarity *= 0.9;

    if( m_flags != other.m_flags )
        similarity *= 0.9;

    if( m_forceVisible != other.m_forceVisible )
        similarity *= 0.9;

    if( m_netinfo->GetNetCode() != other.m_netinfo->GetNetCode() )
        similarity *= 0.9;

    similarity *= EDA_SHAPE::Similarity( other );

    return similarity;
}


static struct PCB_SHAPE_DESC
{
    PCB_SHAPE_DESC()
    {
        PROPERTY_MANAGER& propMgr = PROPERTY_MANAGER::Instance();
        REGISTER_TYPE( PCB_SHAPE );
        propMgr.AddTypeCast( new TYPE_CAST<PCB_SHAPE, BOARD_CONNECTED_ITEM> );
        propMgr.AddTypeCast( new TYPE_CAST<PCB_SHAPE, EDA_SHAPE> );
        propMgr.InheritsAfter( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( BOARD_CONNECTED_ITEM ) );
        propMgr.InheritsAfter( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( EDA_SHAPE ) );

        // Need to initialise enum_map before we can use a Property enum for it
        ENUM_MAP<PCB_LAYER_ID>& layerEnum = ENUM_MAP<PCB_LAYER_ID>::Instance();

        if( layerEnum.Choices().GetCount() == 0 )
        {
            layerEnum.Undefined( UNDEFINED_LAYER );

            for( LSEQ seq = LSET::AllLayersMask().Seq(); seq; ++seq )
                layerEnum.Map( *seq, LSET::Name( *seq ) );
        }

        void ( PCB_SHAPE::*shapeLayerSetter )( PCB_LAYER_ID ) = &PCB_SHAPE::SetLayer;
        PCB_LAYER_ID ( PCB_SHAPE::*shapeLayerGetter )() const = &PCB_SHAPE::GetLayer;

        auto layerProperty = new PROPERTY_ENUM<PCB_SHAPE, PCB_LAYER_ID>(
                _HKI( "Layer" ), shapeLayerSetter, shapeLayerGetter );

        propMgr.ReplaceProperty( TYPE_HASH( BOARD_CONNECTED_ITEM ), _HKI( "Layer" ), layerProperty );

        // Only polygons have meaningful Position properties.
        // On other shapes, these are duplicates of the Start properties.
        auto isPolygon =
                []( INSPECTABLE* aItem ) -> bool
                {
                    if( PCB_SHAPE* shape = dynamic_cast<PCB_SHAPE*>( aItem ) )
                        return shape->GetShape() == SHAPE_T::POLY;

                    return false;
                };

        propMgr.OverrideAvailability( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( BOARD_ITEM ),
                                      _HKI( "Position X" ), isPolygon );
        propMgr.OverrideAvailability( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( BOARD_ITEM ),
                                      _HKI( "Position Y" ), isPolygon );

        propMgr.Mask( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( EDA_SHAPE ), _HKI( "Line Color" ) );
        propMgr.Mask( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( EDA_SHAPE ), _HKI( "Fill Color" ) );

        auto isCopper =
                []( INSPECTABLE* aItem ) -> bool
                {
                    if( PCB_SHAPE* shape = dynamic_cast<PCB_SHAPE*>( aItem ) )
                        return shape->IsOnCopperLayer();

                    return false;
                };

        propMgr.OverrideAvailability( TYPE_HASH( PCB_SHAPE ), TYPE_HASH( BOARD_CONNECTED_ITEM ),
                                      _HKI( "Net" ), isCopper );

        auto isPadEditMode =
                []( BOARD* aBoard ) -> bool
                {
                    if( aBoard && aBoard->IsFootprintHolder() )
                    {
                        for( FOOTPRINT* fp : aBoard->Footprints() )
                        {
                            for( PAD* pad : fp->Pads() )
                            {
                                if( pad->IsEntered() )
                                    return true;
                            }
                        }
                    }

                    return false;
                };

        auto showNumberBoxProperty =
                [&]( INSPECTABLE* aItem ) -> bool
                {
                    if( PCB_SHAPE* shape = dynamic_cast<PCB_SHAPE*>( aItem ) )
                    {
                        if( shape->GetShape() == SHAPE_T::RECTANGLE )
                            return isPadEditMode( shape->GetBoard() );
                    }

                    return false;
                };

        auto showSpokeTemplateProperty =
                [&]( INSPECTABLE* aItem ) -> bool
                {
                    if( PCB_SHAPE* shape = dynamic_cast<PCB_SHAPE*>( aItem ) )
                    {
                        if( shape->GetShape() == SHAPE_T::SEGMENT )
                            return isPadEditMode( shape->GetBoard() );
                    }

                    return false;
                };

        const wxString groupPadPrimitives = _HKI( "Pad Primitives" );

        propMgr.AddProperty( new PROPERTY<PCB_SHAPE, bool>( _HKI( "Number Box" ),
                                                            &PCB_SHAPE::SetIsProxyItem,
                                                            &PCB_SHAPE::IsProxyItem ),
                             groupPadPrimitives )
                .SetAvailableFunc( showNumberBoxProperty )
                .SetIsHiddenFromRulesEditor();

        propMgr.AddProperty( new PROPERTY<PCB_SHAPE, bool>( _HKI( "Thermal Spoke Template" ),
                                                            &PCB_SHAPE::SetIsProxyItem,
                                                            &PCB_SHAPE::IsProxyItem ),
                             groupPadPrimitives )
                .SetAvailableFunc( showSpokeTemplateProperty )
                .SetIsHiddenFromRulesEditor();
    }
} _PCB_SHAPE_DESC;