kicad/pcbnew/eagle_plugin.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 2012-2017 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
 */


/*

Pcbnew PLUGIN for Eagle 6.x XML *.brd and footprint format.

XML parsing and converting:
Getting line numbers and byte offsets from the source XML file is not
possible using currently available XML libraries within KiCad project:
wxXmlDocument and boost::property_tree.

property_tree will give line numbers but no byte offsets, and only during
document loading. This means that if we have a problem after the document is
successfully loaded, there is no way to correlate back to line number and byte
offset of the problem. So a different approach is taken, one which relies on the
XML elements themselves using an XPATH type of reporting mechanism. The path to
the problem is reported in the error messages. This means keeping track of that
path as we traverse the XML document for the sole purpose of accurate error
reporting.

User can load the source XML file into firefox or other xml browser and follow
our error message.

Load() TODO's

*) verify zone fill clearances are correct

*/

#include <errno.h>

#include <wx/string.h>
#include <wx/xml/xml.h>

#include <common.h>
#include <macros.h>
#include <fctsys.h>
#include <trigo.h>
#include <macros.h>
#include <geometry/geometry_utils.h>
#include <kicad_string.h>
#include <properties.h>
#include <wx/filename.h>

#include <class_board.h>
#include <class_module.h>
#include <class_track.h>
#include <class_edge_mod.h>
#include <class_zone.h>
#include <class_pcb_text.h>
#include <class_dimension.h>

#include <eagle_plugin.h>

using namespace std;


typedef MODULE_MAP::iterator          MODULE_ITER;
typedef MODULE_MAP::const_iterator    MODULE_CITER;


/// Parse an eagle distance which is either mm, or mils if there is "mil" suffix.
/// Return is in BIU.
static int parseEagle( const wxString& aDistance )
{
    ECOORD::EAGLE_UNIT unit = ( aDistance.npos != aDistance.find( "mil" ) )
        ? ECOORD::EAGLE_UNIT::EU_MIL : ECOORD::EAGLE_UNIT::EU_MM;

    ECOORD coord( aDistance, unit );

    return coord.ToPcbUnits();
}


// In Eagle one can specify DRC rules where min value > max value,
// in such case the max value has the priority
template<typename T>
static T eagleClamp( T aMin, T aValue, T aMax )
{
    T ret = std::max( aMin, aValue );
    return std::min( aMax, ret );
}


/// Assemble a two part key as a simple concatenation of aFirst and aSecond parts,
/// using a separator.
static wxString makeKey( const wxString& aFirst, const wxString& aSecond )
{
    wxString key = aFirst + '\x02' +  aSecond;
    return key;
}


void ERULES::parse( wxXmlNode* aRules )
{
    wxXmlNode* child = aRules->GetChildren();

    while( child )
    {
        if( child->GetName() == "param" )
        {
            const wxString& name = child->GetAttribute( "name" );
            const wxString& value = child->GetAttribute( "value" );

            if( name == "psElongationLong" )
                psElongationLong = wxAtoi( value );
            else if( name == "psElongationOffset" )
                psElongationOffset = wxAtoi( value );

            else if( name == "mvStopFrame" )
                value.ToDouble( &mvStopFrame );
            else if( name == "mvCreamFrame" )
                value.ToDouble( &mvCreamFrame );
            else if( name == "mlMinStopFrame" )
                mlMinStopFrame = parseEagle( value );
            else if( name == "mlMaxStopFrame" )
                mlMaxStopFrame = parseEagle( value );
            else if( name == "mlMinCreamFrame" )
                mlMinCreamFrame = parseEagle( value );
            else if( name == "mlMaxCreamFrame" )
                mlMaxCreamFrame = parseEagle( value );

            else if( name == "srRoundness" )
                value.ToDouble( &srRoundness );
            else if( name == "srMinRoundness" )
                srMinRoundness = parseEagle( value );
            else if( name == "srMaxRoundness" )
                srMaxRoundness = parseEagle( value );

            else if( name == "rvPadTop" )
                value.ToDouble( &rvPadTop );
            else if( name == "rlMinPadTop" )
                rlMinPadTop = parseEagle( value );
            else if( name == "rlMaxPadTop" )
                rlMaxPadTop = parseEagle( value );

            else if( name == "rvViaOuter" )
                value.ToDouble( &rvViaOuter );
            else if( name == "rlMinViaOuter" )
                rlMinViaOuter = parseEagle( value );
            else if( name == "rlMaxViaOuter" )
                rlMaxViaOuter = parseEagle( value );
            else if( name == "mdWireWire" )
                mdWireWire = parseEagle( value );
        }

        child = child->GetNext();
    }
}


EAGLE_PLUGIN::EAGLE_PLUGIN() :
    m_rules( new ERULES() ),
    m_xpath( new XPATH() ),
    m_mod_time( wxDateTime::Now() )
{
    init( NULL );
    clear_cu_map();
}


EAGLE_PLUGIN::~EAGLE_PLUGIN()
{
    deleteTemplates();
    delete m_rules;
    delete m_xpath;
}


const wxString EAGLE_PLUGIN::PluginName() const
{
    return wxT( "Eagle" );
}


const wxString EAGLE_PLUGIN::GetFileExtension() const
{
    return wxT( "brd" );
}


wxSize inline EAGLE_PLUGIN::kicad_fontz( const ECOORD& d ) const
{
    // texts seem to better match eagle when scaled down by 0.95
    int kz = d.ToPcbUnits() * 95 / 100;
    return wxSize( kz, kz );
}


BOARD* EAGLE_PLUGIN::Load( const wxString& aFileName, BOARD* aAppendToMe,  const PROPERTIES* aProperties )
{
    LOCALE_IO       toggle;     // toggles on, then off, the C locale.
    wxXmlNode*      doc;

    init( aProperties );

    m_board = aAppendToMe ? aAppendToMe : new BOARD();

    // Give the filename to the board if it's new
    if( !aAppendToMe )
        m_board->SetFileName( aFileName );

    // delete on exception, if I own m_board, according to aAppendToMe
    unique_ptr<BOARD> deleter( aAppendToMe ? NULL : m_board );

    try
    {
        // Load the document
        wxXmlDocument xmlDocument;
        wxFileName fn = aFileName;

        if( !xmlDocument.Load( fn.GetFullPath() ) )
            THROW_IO_ERROR( wxString::Format( _( "Unable to read file \"%s\"" ),
                                              fn.GetFullPath() ) );

        doc = xmlDocument.GetRoot();

        m_min_trace    = INT_MAX;
        m_min_via      = INT_MAX;
        m_min_via_hole = INT_MAX;

        loadAllSections( doc );

        BOARD_DESIGN_SETTINGS& designSettings = m_board->GetDesignSettings();

        if( m_min_trace < designSettings.m_TrackMinWidth )
            designSettings.m_TrackMinWidth = m_min_trace;

        if( m_min_via < designSettings.m_ViasMinSize )
            designSettings.m_ViasMinSize = m_min_via;

        if( m_min_via_hole < designSettings.m_ViasMinDrill )
            designSettings.m_ViasMinDrill = m_min_via_hole;

        if( m_rules->mdWireWire )
        {
            NETCLASSPTR defaultNetclass = designSettings.GetDefault();
            int         clearance = KiROUND( m_rules->mdWireWire );

            if( clearance < defaultNetclass->GetClearance() )
                defaultNetclass->SetClearance( clearance );
        }

        // should be empty, else missing m_xpath->pop()
        wxASSERT( m_xpath->Contents().size() == 0 );
    }
    // Catch all exceptions thrown from the parser.
    catch( const XML_PARSER_ERROR &exc )
    {
        wxString errmsg = exc.what();

        errmsg += "\n@ ";
        errmsg += m_xpath->Contents();

        THROW_IO_ERROR( errmsg );
    }

    // IO_ERROR exceptions are left uncaught, they pass upwards from here.

    // Ensure the copper layers count is a multiple of 2
    // Pcbnew does not like boards with odd layers count
    // (these boards cannot exist. they actually have a even layers count)
    int lyrcnt = m_board->GetCopperLayerCount();

    if( (lyrcnt % 2) != 0 )
    {
        lyrcnt++;
        m_board->SetCopperLayerCount( lyrcnt );
    }

    centerBoard();

    deleter.release();
    return m_board;
}


void EAGLE_PLUGIN::init( const PROPERTIES* aProperties )
{
    m_hole_count   = 0;
    m_min_trace    = 0;
    m_min_via      = 0;
    m_min_via_hole = 0;
    m_xpath->clear();
    m_pads_to_nets.clear();

    m_board = NULL;
    m_props = aProperties;


    delete m_rules;
    m_rules = new ERULES();
}


void EAGLE_PLUGIN::clear_cu_map()
{
    // All cu layers are invalid until we see them in the <layers> section while
    // loading either a board or library.  See loadLayerDefs().
    for( unsigned i = 0;  i < DIM(m_cu_map);  ++i )
        m_cu_map[i] = -1;
}


void EAGLE_PLUGIN::loadAllSections( wxXmlNode* aDoc )
{
    wxXmlNode* drawing       = MapChildren( aDoc )["drawing"];
    NODE_MAP drawingChildren = MapChildren( drawing );

    wxXmlNode* board         = drawingChildren["board"];
    NODE_MAP boardChildren   = MapChildren( board );

    m_xpath->push( "eagle.drawing" );

    {
        m_xpath->push( "board" );

        wxXmlNode* designrules = boardChildren["designrules"];
        loadDesignRules( designrules );

        m_xpath->pop();
    }

    {
        m_xpath->push( "layers" );

        wxXmlNode* layers = drawingChildren["layers"];
        loadLayerDefs( layers );

        m_xpath->pop();
    }

    {
        m_xpath->push( "board" );

        wxXmlNode* plain = boardChildren["plain"];
        loadPlain( plain );

        wxXmlNode*  signals = boardChildren["signals"];
        loadSignals( signals );

        wxXmlNode*  libs = boardChildren["libraries"];
        loadLibraries( libs );

        wxXmlNode* elems = boardChildren["elements"];
        loadElements( elems );

        m_xpath->pop();     // "board"
    }

    m_xpath->pop();     // "eagle.drawing"
}


void EAGLE_PLUGIN::loadDesignRules( wxXmlNode* aDesignRules )
{
    if( aDesignRules )
    {
        m_xpath->push( "designrules" );
        m_rules->parse( aDesignRules );
        m_xpath->pop();     // "designrules"
    }
}


void EAGLE_PLUGIN::loadLayerDefs( wxXmlNode* aLayers )
{
    if( !aLayers )
        return;

    ELAYERS cu;  // copper layers

    // Get the first layer and iterate
    wxXmlNode* layerNode = aLayers->GetChildren();

    m_eagleLayers.clear();

    while( layerNode )
    {
        ELAYER elayer( layerNode );
        m_eagleLayers.insert( std::make_pair( elayer.number, elayer ) );

        // find the subset of layers that are copper and active
        if( elayer.number >= 1 && elayer.number <= 16 && ( !elayer.active || *elayer.active ) )
        {
            cu.push_back( elayer );
        }

        layerNode = layerNode->GetNext();
    }

    // establish cu layer map:
    int ki_layer_count = 0;

    for( EITER it = cu.begin();  it != cu.end();  ++it,  ++ki_layer_count )
    {
        if( ki_layer_count == 0 )
            m_cu_map[it->number] = F_Cu;
        else if( ki_layer_count == int( cu.size()-1 ) )
            m_cu_map[it->number] = B_Cu;
        else
        {
            // some eagle boards do not have contiguous layer number sequences.

#if 0   // pre PCB_LAYER_ID & LSET:
            m_cu_map[it->number] = cu.size() - 1 - ki_layer_count;
#else
            m_cu_map[it->number] = ki_layer_count;
#endif
        }
    }

#if 0 && defined(DEBUG)
    printf( "m_cu_map:\n" );
    for( unsigned i=0; i<DIM(m_cu_map);  ++i )
    {
        printf( "\t[%d]:%d\n", i, m_cu_map[i] );
    }
#endif

    // Set the layer names and cu count iff we're loading a board.
    if( m_board )
    {
        m_board->SetCopperLayerCount( cu.size() );

        for( EITER it = cu.begin();  it != cu.end();  ++it )
        {
            PCB_LAYER_ID layer =  kicad_layer( it->number );

            // these function provide their own protection against UNDEFINED_LAYER:
            m_board->SetLayerName( layer, FROM_UTF8( it->name.c_str() ) );
            m_board->SetLayerType( layer, LT_SIGNAL );

            // could map the colors here
        }
    }
}


void EAGLE_PLUGIN::loadPlain( wxXmlNode* aGraphics )
{
    if( !aGraphics )
        return;

    m_xpath->push( "plain" );

    // Get the first graphic and iterate
    wxXmlNode* gr = aGraphics->GetChildren();

    // (polygon | wire | text | circle | rectangle | frame | hole)*
    while( gr )
    {
        wxString grName = gr->GetName();

        if( grName == "wire" )
        {
            m_xpath->push( "wire" );

            EWIRE        w( gr );
            PCB_LAYER_ID layer = kicad_layer( w.layer );

            wxPoint start( kicad_x( w.x1 ), kicad_y( w.y1 ) );
            wxPoint end(   kicad_x( w.x2 ), kicad_y( w.y2 ) );

            if( layer != UNDEFINED_LAYER )
            {
                DRAWSEGMENT* dseg = new DRAWSEGMENT( m_board );
                m_board->Add( dseg, ADD_APPEND );

                if( !w.curve )
                {
                    dseg->SetStart( start );
                    dseg->SetEnd( end );
                }
                else
                {
                    wxPoint center = ConvertArcCenter( start, end, *w.curve );

                    dseg->SetShape( S_ARC );
                    dseg->SetStart( center );
                    dseg->SetEnd( start );
                    dseg->SetAngle( *w.curve * -10.0 ); // KiCad rotates the other way
                }

                dseg->SetTimeStamp( EagleTimeStamp( gr ) );
                dseg->SetLayer( layer );
                dseg->SetWidth( Millimeter2iu( DEFAULT_PCB_EDGE_THICKNESS ) );
            }
            m_xpath->pop();
        }
        else if( grName == "text" )
        {
            m_xpath->push( "text" );

            ETEXT        t( gr );
            PCB_LAYER_ID layer = kicad_layer( t.layer );

            if( layer != UNDEFINED_LAYER )
            {
                TEXTE_PCB* pcbtxt = new TEXTE_PCB( m_board );
                m_board->Add( pcbtxt, ADD_APPEND );

                pcbtxt->SetLayer( layer );
                pcbtxt->SetTimeStamp( EagleTimeStamp( gr ) );
                pcbtxt->SetText( FROM_UTF8( t.text.c_str() ) );
                pcbtxt->SetTextPos( wxPoint( kicad_x( t.x ), kicad_y( t.y ) ) );

                pcbtxt->SetTextSize( kicad_fontz( t.size ) );

                double ratio = t.ratio ? *t.ratio : 8;     // DTD says 8 is default

                pcbtxt->SetThickness( t.size.ToPcbUnits() * ratio / 100 );

                int align = t.align ? *t.align : ETEXT::BOTTOM_LEFT;

                if( t.rot )
                {
                    int sign = t.rot->mirror ? -1 : 1;
                    pcbtxt->SetMirrored( t.rot->mirror );

                    double degrees = t.rot->degrees;

                    if( degrees == 90 || t.rot->spin )
                        pcbtxt->SetTextAngle( sign * t.rot->degrees * 10 );
                    else if( degrees == 180 )
                        align = ETEXT::TOP_RIGHT;
                    else if( degrees == 270 )
                    {
                        pcbtxt->SetTextAngle( sign * 90 * 10 );
                        align = ETEXT::TOP_RIGHT;
                    }
                    else // Ok so text is not at 90,180 or 270 so do some funny stuf to get placement right
                    {
                        if( ( degrees > 0 ) &&  ( degrees < 90 ) )
                            pcbtxt->SetTextAngle( sign * t.rot->degrees * 10 );
                        else if( ( degrees > 90 ) && ( degrees < 180 ) )
                        {
                            pcbtxt->SetTextAngle( sign * ( t.rot->degrees + 180 ) * 10 );
                            align = ETEXT::TOP_RIGHT;
                        }
                        else if( ( degrees > 180 ) && ( degrees < 270 ) )
                        {
                            pcbtxt->SetTextAngle( sign * ( t.rot->degrees - 180 ) * 10 );
                            align = ETEXT::TOP_RIGHT;
                        }
                        else if( ( degrees > 270 ) && ( degrees < 360 ) )
                        {
                            pcbtxt->SetTextAngle( sign * t.rot->degrees * 10 );
                            align = ETEXT::BOTTOM_LEFT;
                        }
                    }
                }

                switch( align )
                {
                case ETEXT::CENTER:
                    // this was the default in pcbtxt's constructor
                    break;

                case ETEXT::CENTER_LEFT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
                    break;

                case ETEXT::CENTER_RIGHT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
                    break;

                case ETEXT::TOP_CENTER:
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
                    break;

                case ETEXT::TOP_LEFT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
                    break;

                case ETEXT::TOP_RIGHT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
                    break;

                case ETEXT::BOTTOM_CENTER:
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
                    break;

                case ETEXT::BOTTOM_LEFT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
                    break;

                case ETEXT::BOTTOM_RIGHT:
                    pcbtxt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
                    pcbtxt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
                    break;
                }
            }
            m_xpath->pop();
        }
        else if( grName == "circle" )
        {
            m_xpath->push( "circle" );

            ECIRCLE      c( gr );
            PCB_LAYER_ID layer = kicad_layer( c.layer );

            if( layer != UNDEFINED_LAYER )       // unsupported layer
            {
                DRAWSEGMENT* dseg = new DRAWSEGMENT( m_board );
                m_board->Add( dseg, ADD_APPEND );

                dseg->SetShape( S_CIRCLE );
                dseg->SetTimeStamp( EagleTimeStamp( gr ) );
                dseg->SetLayer( layer );
                dseg->SetStart( wxPoint( kicad_x( c.x ), kicad_y( c.y ) ) );
                dseg->SetEnd( wxPoint( kicad_x( c.x + c.radius ), kicad_y( c.y ) ) );
                dseg->SetWidth( c.width.ToPcbUnits() );
            }
            m_xpath->pop();
        }
        else if( grName == "rectangle" )
        {
            // This seems to be a simplified rectangular [copper] zone, cannot find any
            // net related info on it from the DTD.
            m_xpath->push( "rectangle" );

            ERECT        r( gr );
            PCB_LAYER_ID layer = kicad_layer( r.layer );

            if( IsCopperLayer( layer ) )
            {
                // use a "netcode = 0" type ZONE:
                ZONE_CONTAINER* zone = new ZONE_CONTAINER( m_board );
                m_board->Add( zone, ADD_APPEND );

                zone->SetTimeStamp( EagleTimeStamp( gr ) );
                zone->SetLayer( layer );
                zone->SetNetCode( NETINFO_LIST::UNCONNECTED );

                ZONE_CONTAINER::HATCH_STYLE outline_hatch = ZONE_CONTAINER::DIAGONAL_EDGE;

                const int outlineIdx = -1;      // this is the id of the copper zone main outline
                zone->AppendCorner( wxPoint( kicad_x( r.x1 ), kicad_y( r.y1 ) ), outlineIdx );
                zone->AppendCorner( wxPoint( kicad_x( r.x2 ), kicad_y( r.y1 ) ), outlineIdx );
                zone->AppendCorner( wxPoint( kicad_x( r.x2 ), kicad_y( r.y2 ) ), outlineIdx );
                zone->AppendCorner( wxPoint( kicad_x( r.x1 ), kicad_y( r.y2 ) ), outlineIdx );

                if( r.rot )
                {
                    zone->Rotate( zone->GetPosition(), r.rot->degrees * 10 );
                }
                // this is not my fault:
                zone->SetHatch( outline_hatch, zone->GetDefaultHatchPitch(), true );
            }

            m_xpath->pop();
        }
        else if( grName == "hole" )
        {
            m_xpath->push( "hole" );

            // Fabricate a MODULE with a single PAD_ATTRIB_HOLE_NOT_PLATED pad.
            // Use m_hole_count to gen up a unique name.

            MODULE* module = new MODULE( m_board );
            m_board->Add( module, ADD_APPEND );
            module->SetReference( wxString::Format( "@HOLE%d", m_hole_count++ ) );
            module->Reference().SetVisible( false );

            packageHole( module, gr, true );

            m_xpath->pop();
        }
        else if( grName == "frame" )
        {
            // picture this
        }
        else if( grName == "polygon" )
        {
            m_xpath->push( "polygon" );
            loadPolygon( gr );
            m_xpath->pop();     // "polygon"
        }
        else if( grName == "dimension" )
        {
            EDIMENSION d( gr );
            PCB_LAYER_ID layer = kicad_layer( d.layer );

            if( layer != UNDEFINED_LAYER )
            {
                const BOARD_DESIGN_SETTINGS& designSettings = m_board->GetDesignSettings();
                DIMENSION* dimension = new DIMENSION( m_board );
                m_board->Add( dimension, ADD_APPEND );

                if( d.dimensionType )
                {
                    // Eagle dimension graphic arms may have different lengths, but they look
                    // incorrect in KiCad (the graphic is tilted). Make them even lenght in such case.
                    if( *d.dimensionType == "horizontal" )
                    {
                        int newY = ( d.y1.ToPcbUnits() + d.y2.ToPcbUnits() ) / 2;
                        d.y1 = ECOORD( newY, ECOORD::EAGLE_UNIT::EU_NM );
                        d.y2 = ECOORD( newY, ECOORD::EAGLE_UNIT::EU_NM );
                    }
                    else if( *d.dimensionType == "vertical" )
                    {
                        int newX = ( d.x1.ToPcbUnits() + d.x2.ToPcbUnits() ) / 2;
                        d.x1 = ECOORD( newX, ECOORD::EAGLE_UNIT::EU_NM );
                        d.x2 = ECOORD( newX, ECOORD::EAGLE_UNIT::EU_NM );
                    }
                }

                dimension->SetLayer( layer );
                // The origin and end are assumed to always be in this order from eagle
                dimension->SetOrigin( wxPoint( kicad_x( d.x1 ), kicad_y( d.y1 ) ) );
                dimension->SetEnd( wxPoint( kicad_x( d.x2 ), kicad_y( d.y2 ) ) );
                dimension->Text().SetTextSize( designSettings.GetTextSize( layer ) );
                dimension->Text().SetThickness( designSettings.GetTextThickness( layer ) );
                dimension->SetWidth( designSettings.GetLineThickness( layer ) );
                dimension->SetUnits( MILLIMETRES, false );

                // check which axis the dimension runs in
                // because the "height" of the dimension is perpendicular to that axis
                // Note the check is just if two axes are close enough to each other
                // Eagle appears to have some rounding errors
                if( abs( ( d.x1 - d.x2 ).ToPcbUnits() ) < 50000 )   // 50000 nm = 0.05 mm
                    dimension->SetHeight( kicad_x( d.x3 - d.x1 ) );
                else
                    dimension->SetHeight( kicad_y( d.y3 - d.y1 ) );

                dimension->AdjustDimensionDetails();
            }
        }

        // Get next graphic
        gr = gr->GetNext();
    }
    m_xpath->pop();
}


void EAGLE_PLUGIN::loadLibrary( wxXmlNode* aLib, const wxString* aLibName )
{
    if( !aLib || !aLibName )
        return;

    // library will have <xmlattr> node, skip that and get the single packages node
    wxXmlNode* packages = MapChildren( aLib )["packages"];

    if( !packages )
        return;

    m_xpath->push( "packages" );

    // Create a MODULE for all the eagle packages, for use later via a copy constructor
    // to instantiate needed MODULES in our BOARD.  Save the MODULE templates in
    // a MODULE_MAP using a single lookup key consisting of libname+pkgname.

    // Get the first package and iterate
    wxXmlNode* package = packages->GetChildren();

    while( package )
    {
        m_xpath->push( "package", "name" );

        wxString pack_ref = package->GetAttribute( "name" );
        ReplaceIllegalFileNameChars( pack_ref, '_' );

        m_xpath->Value( pack_ref.ToUTF8() );

        wxString key = aLibName ? makeKey( *aLibName, pack_ref ) : pack_ref;

        MODULE* m = makeModule( package, pack_ref );

        // add the templating MODULE to the MODULE template factory "m_templates"
        std::pair<MODULE_ITER, bool> r = m_templates.insert( {key, m} );

        if( !r.second
            // && !( m_props && m_props->Value( "ignore_duplicates" ) )
            )
        {
            wxString lib = aLibName ? *aLibName : m_lib_path;
            wxString pkg = pack_ref;

            wxString emsg = wxString::Format(
                _( "<package> name: \"%s\" duplicated in eagle <library>: \"%s\"" ),
                GetChars( pkg ),
                GetChars( lib )
                );
            THROW_IO_ERROR( emsg );
        }

        m_xpath->pop();

        package = package->GetNext();
    }

    m_xpath->pop();     // "packages"
}


void EAGLE_PLUGIN::loadLibraries( wxXmlNode* aLibs )
{
    if( !aLibs )
        return;

    m_xpath->push( "libraries.library", "name" );

    // Get the first library and iterate
    wxXmlNode* library = aLibs->GetChildren();

    while( library )
    {
        const wxString& lib_name = library->GetAttribute( "name" );

        m_xpath->Value( lib_name.c_str() );
        loadLibrary( library, &lib_name );
        library = library->GetNext();
    }

    m_xpath->pop();
}


void EAGLE_PLUGIN::loadElements( wxXmlNode* aElements )
{
    if( !aElements )
        return;

    m_xpath->push( "elements.element", "name" );

    EATTR   name;
    EATTR   value;
    bool refanceNamePresetInPackageLayout;
    bool valueNamePresetInPackageLayout;

    // Get the first element and iterate
    wxXmlNode* element = aElements->GetChildren();

    while( element )
    {
        if( element->GetName() != "element" )
        {
            wxLogDebug( "expected: <element> read <%s>. Skip it", element->GetName() );
            // Get next item
            element = element->GetNext();
            continue;
        }

        EELEMENT    e( element );

        // use "NULL-ness" as an indication of presence of the attribute:
        EATTR*      nameAttr  = 0;
        EATTR*      valueAttr = 0;

        m_xpath->Value( e.name.c_str() );

        wxString pkg_key = makeKey( e.library, e.package );

        MODULE_CITER mi = m_templates.find( pkg_key );

        if( mi == m_templates.end() )
        {
            wxString emsg = wxString::Format( _( "No \"%s\" package in library \"%s\"" ),
                                              GetChars( FROM_UTF8( e.package.c_str() ) ),
                                              GetChars( FROM_UTF8( e.library.c_str() ) ) );
            THROW_IO_ERROR( emsg );
        }

        // copy constructor to clone the template
        MODULE* m = new MODULE( *mi->second );
        m_board->Add( m, ADD_APPEND );

        // update the nets within the pads of the clone
        for( D_PAD* pad = m->PadsList();  pad;  pad = pad->Next() )
        {
            wxString pn_key = makeKey( e.name, pad->GetName() );

            NET_MAP_CITER ni = m_pads_to_nets.find( pn_key );
            if( ni != m_pads_to_nets.end() )
            {
                const ENET* enet = &ni->second;
                pad->SetNetCode( enet->netcode );
            }
        }

        refanceNamePresetInPackageLayout = true;
        valueNamePresetInPackageLayout = true;
        m->SetPosition( wxPoint( kicad_x( e.x ), kicad_y( e.y ) ) );

        // Is >NAME field set in package layout ?
        if( m->GetReference().size() == 0 )
        {
            m->Reference().SetVisible( false ); // No so no show
            refanceNamePresetInPackageLayout = false;
        }

        // Is >VALUE field set in package layout
        if( m->GetValue().size() == 0 )
        {
            m->Value().SetVisible( false );     // No so no show
            valueNamePresetInPackageLayout = false;
        }

        m->SetReference( FROM_UTF8( e.name.c_str() ) );
        m->SetValue( FROM_UTF8( e.value.c_str() ) );

        if( !e.smashed )
        { // Not smashed so show NAME & VALUE
            if( valueNamePresetInPackageLayout )
                m->Value().SetVisible( true );  // Only if place holder in package layout

            if( refanceNamePresetInPackageLayout )
                m->Reference().SetVisible( true );   // Only if place holder in package layout
        }
        else if( *e.smashed == true )
        { // Smasted so set default to no show for NAME and VALUE
            m->Value().SetVisible( false );
            m->Reference().SetVisible( false );

            // initalize these to default values incase the <attribute> elements are not present.
            m_xpath->push( "attribute", "name" );

            // VALUE and NAME can have something like our text "effects" overrides
            // in SWEET and new schematic.  Eagle calls these XML elements "attribute".
            // There can be one for NAME and/or VALUE both.  Features present in the
            // EATTR override the ones established in the package only if they are
            // present here (except for rot, which if not present means angle zero).
            // So the logic is a bit different than in packageText() and in plain text.

            // Get the first attribute and iterate
            wxXmlNode* attribute = element->GetChildren();

            while( attribute )
            {
                if( attribute->GetName() != "attribute" )
                {
                    wxLogDebug( "expected: <attribute> read <%s>. Skip it", attribute->GetName() );
                    attribute = attribute->GetNext();
                    continue;
                }

                EATTR   a( attribute );

                if( a.name == "NAME" )
                {
                    name = a;
                    nameAttr = &name;

                    // do we have a display attribute ?
                    if( a.display  )
                    {
                        // Yes!
                        switch( *a.display )
                        {
                        case EATTR::VALUE :
                            nameAttr->name = e.name;
                            m->SetReference( e.name );
                            if( refanceNamePresetInPackageLayout )
                                m->Reference().SetVisible( true );
                            break;

                        case EATTR::NAME :
                            if( refanceNamePresetInPackageLayout )
                            {
                                m->SetReference( "NAME" );
                                m->Reference().SetVisible( true );
                            }
                            break;

                        case EATTR::BOTH :
                            if( refanceNamePresetInPackageLayout )
                                m->Reference().SetVisible( true );
                            nameAttr->name =  nameAttr->name + " = " + e.name;
                            m->SetReference( "NAME = " + e.name );
                            break;

                        case EATTR::Off :
                            m->Reference().SetVisible( false );
                            break;

                        default:
                            nameAttr->name =  e.name;
                            if( refanceNamePresetInPackageLayout )
                                m->Reference().SetVisible( true );
                        }
                    }
                    else
                        // No display, so default is visable, and show value of NAME
                        m->Reference().SetVisible( true );
                }
                else if( a.name == "VALUE" )
                {
                    value = a;
                    valueAttr = &value;

                    if( a.display  )
                    {
                        // Yes!
                        switch( *a.display )
                        {
                        case EATTR::VALUE :
                            valueAttr->value = opt_wxString( e.value );
                            m->SetValue( e.value );
                            if( valueNamePresetInPackageLayout )
                                m->Value().SetVisible( true );
                            break;

                        case EATTR::NAME :
                            if( valueNamePresetInPackageLayout )
                                m->Value().SetVisible( true );
                            m->SetValue( "VALUE" );
                            break;

                        case EATTR::BOTH :
                            if( valueNamePresetInPackageLayout )
                                m->Value().SetVisible( true );
                            valueAttr->value = opt_wxString( "VALUE = " + e.value );
                            m->SetValue( "VALUE = " + e.value );
                            break;

                        case EATTR::Off :
                            m->Value().SetVisible( false );
                            break;

                        default:
                            valueAttr->value = opt_wxString( e.value );
                            if( valueNamePresetInPackageLayout )
                                m->Value().SetVisible( true );
                        }
                    }
                    else
                        // No display, so default is visible, and show value of NAME
                        m->Value().SetVisible( true );

                }

                attribute = attribute->GetNext();
            }

            m_xpath->pop();     // "attribute"
        }

        orientModuleAndText( m, e, nameAttr, valueAttr );

        // Get next element
        element = element->GetNext();
    }

    m_xpath->pop();     // "elements.element"
}


ZONE_CONTAINER* EAGLE_PLUGIN::loadPolygon( wxXmlNode* aPolyNode )
{
    EPOLYGON p( aPolyNode );
    PCB_LAYER_ID layer = kicad_layer( p.layer );
    ZONE_CONTAINER* zone = nullptr;
    bool keepout = ( p.layer == EAGLE_LAYER::TRESTRICT || p.layer == EAGLE_LAYER::BRESTRICT );

    if( !IsCopperLayer( layer ) && !keepout )
        return nullptr;

    // use a "netcode = 0" type ZONE:
    zone = new ZONE_CONTAINER( m_board );
    zone->SetTimeStamp( EagleTimeStamp( aPolyNode ) );
    m_board->Add( zone, ADD_APPEND );

    if( p.layer == EAGLE_LAYER::TRESTRICT )         // front layer keepout
        zone->SetLayer( F_Cu );
    else if( p.layer == EAGLE_LAYER::BRESTRICT )    // bottom layer keepout
        zone->SetLayer( B_Cu );
    else
        zone->SetLayer( layer );

    if( keepout )
    {
        zone->SetIsKeepout( true );
        zone->SetDoNotAllowVias( true );
        zone->SetDoNotAllowTracks( true );
        zone->SetDoNotAllowCopperPour( true );
    }

    // Get the first vertex and iterate
    wxXmlNode* vertex = aPolyNode->GetChildren();
    std::vector<EVERTEX> vertices;

    // Create a circular vector of vertices
    // The "curve" parameter indicates a curve from the current
    // to the next vertex, so we keep the first at the end as well
    // to allow the curve to link back
    while( vertex )
    {
        if( vertex->GetName() == "vertex" )
            vertices.push_back( EVERTEX( vertex ) );

        vertex = vertex->GetNext();
    }

    vertices.push_back( vertices[0] );

    for( size_t i = 0; i < vertices.size() - 1; i++ )
    {
        EVERTEX v1 = vertices[i];

        // Append the corner
        zone->AppendCorner( wxPoint( kicad_x( v1.x ), kicad_y( v1.y ) ), -1 );

        if( v1.curve )
        {
            EVERTEX v2 = vertices[i + 1];
            wxPoint center = ConvertArcCenter(
                    wxPoint( kicad_x( v1.x ), kicad_y( v1.y ) ),
                    wxPoint( kicad_x( v2.x ), kicad_y( v2.y ) ), *v1.curve );
            double angle = DEG2RAD( *v1.curve );
            double end_angle = atan2( kicad_y( v2.y ) - center.y,
                                        kicad_x( v2.x ) - center.x );
            double radius = sqrt( pow( center.x - kicad_x( v1.x ), 2 )
                                + pow( center.y - kicad_y( v1.y ), 2 ) );

            // If we are curving, we need at least 2 segments otherwise
            // delta_angle == angle
            double delta_angle = angle / std::max(
                            2, GetArcToSegmentCount( KiROUND( radius ),
                            ARC_HIGH_DEF, *v1.curve ) - 1 );

            for( double a = end_angle + angle;
                    fabs( a - end_angle ) > fabs( delta_angle );
                    a -= delta_angle )
            {
                zone->AppendCorner(
                        wxPoint( KiROUND( radius * cos( a ) ),
                                    KiROUND( radius * sin( a ) ) ) + center,
                        -1 );
            }
        }
    }

    // If the pour is a cutout it needs to be set to a keepout
    if( p.pour == EPOLYGON::CUTOUT )
    {
        zone->SetIsKeepout( true );
        zone->SetDoNotAllowCopperPour( true );
        zone->SetHatchStyle( ZONE_CONTAINER::NO_HATCH );
    }

    // if spacing is set the zone should be hatched
    // However, use the default hatch step, p.spacing value has no meaning for Kicad
    // TODO: see if this parameter is related to a grid fill option.
    if( p.spacing )
        zone->SetHatch( ZONE_CONTAINER::DIAGONAL_EDGE, zone->GetDefaultHatchPitch(), true );

    // clearances, etc.
    zone->SetArcSegmentCount( 32 );     // @todo: should be a constructor default?
    zone->SetMinThickness( p.width.ToPcbUnits() );

    // FIXME: KiCad zones have very rounded corners compared to eagle.
    //        This means that isolation amounts that work well in eagle
    //        tend to make copper intrude in soldermask free areas around pads.
    if( p.isolate )
        zone->SetZoneClearance( p.isolate->ToPcbUnits() );
    else
        zone->SetZoneClearance( 0 );

    // missing == yes per DTD.
    bool thermals = !p.thermals || *p.thermals;
    zone->SetPadConnection( thermals ? PAD_ZONE_CONN_THERMAL : PAD_ZONE_CONN_FULL );

    if( thermals )
    {
        // FIXME: eagle calculates dimensions for thermal spokes
        //        based on what the zone is connecting to.
        //        (i.e. width of spoke is half of the smaller side of an smd pad)
        //        This is a basic workaround
        zone->SetThermalReliefGap( p.width.ToPcbUnits() + 50000 ); // 50000nm == 0.05mm
        zone->SetThermalReliefCopperBridge( p.width.ToPcbUnits() + 50000 );
    }

    int rank = p.rank ? (p.max_priority - *p.rank) : p.max_priority;
    zone->SetPriority( rank );

    return zone;
}


void EAGLE_PLUGIN::orientModuleAndText( MODULE* m, const EELEMENT& e,
                    const EATTR* nameAttr, const EATTR* valueAttr )
{
    if( e.rot )
    {
        if( e.rot->mirror )
        {
            double orientation = e.rot->degrees + 180.0;
            m->SetOrientation( orientation * 10 );
            m->Flip( m->GetPosition() );
        }
        else
            m->SetOrientation( e.rot->degrees * 10 );
    }

    orientModuleText( m, e, &m->Reference(), nameAttr );
    orientModuleText( m, e, &m->Value(), valueAttr );
}


void EAGLE_PLUGIN::orientModuleText( MODULE* m, const EELEMENT& e,
                            TEXTE_MODULE* txt, const EATTR* aAttr )
{
    // Smashed part ?
    if( aAttr )
    { // Yes
        const EATTR& a = *aAttr;

        if( a.value )
        {
            txt->SetText( FROM_UTF8( a.value->c_str() ) );
        }

        if( a.x && a.y )    // OPT
        {
            wxPoint pos( kicad_x( *a.x ), kicad_y( *a.y ) );
            txt->SetTextPos( pos );
        }

        // Even though size and ratio are both optional, I am not seeing
        // a case where ratio is present but size is not.
        double  ratio = 8;
        wxSize  fontz = txt->GetTextSize();

        if( a.size )
        {
            fontz = kicad_fontz( *a.size );
            txt->SetTextSize( fontz );

            if( a.ratio )
                ratio = *a.ratio;
        }

        int  lw = int( fontz.y * ratio / 100 );
        txt->SetThickness( lw );

        int align = ETEXT::BOTTOM_LEFT;     // bottom-left is eagle default

        // The "rot" in a EATTR seems to be assumed to be zero if it is not
        // present, and this zero rotation becomes an override to the
        // package's text field.  If they did not want zero, they specify
        // what they want explicitly.
        double  degrees  = a.rot ? a.rot->degrees : 0;
        double  orient;      // relative to parent

        int     sign = 1;
        bool    spin = false;

        if( a.rot )
        {
            spin = a.rot->spin;
            sign = a.rot->mirror ? -1 : 1;
            txt->SetMirrored( a.rot->mirror );
        }

        if( degrees == 90 || degrees == 0 || spin )
        {
            orient = degrees - m->GetOrientation() / 10;
            txt->SetTextAngle( sign * orient * 10 );
        }
        else if( degrees == 180 )
        {
            orient = 0 - m->GetOrientation() / 10;
            txt->SetTextAngle( sign * orient * 10 );
            align = ETEXT::TOP_RIGHT;
        }
        else if( degrees == 270 )
        {
            orient = 90 - m->GetOrientation() / 10;
            align = ETEXT::TOP_RIGHT;
            txt->SetTextAngle( sign * orient * 10 );
        }
        else
        {
            orient = 90 - degrees - m->GetOrientation() / 10;
            txt->SetTextAngle( sign * orient * 10 );
        }

        switch( align )
        {
        case ETEXT::TOP_RIGHT:
            txt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
            txt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
            break;

        case ETEXT::BOTTOM_LEFT:
            txt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
            txt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
            break;

        default:
            ;
        }
    }
    else    // Part is not smash so use Lib default for NAME/VALUE // the text is per the original package, sans <attribute>
    {
        double degrees = ( txt->GetTextAngle() + m->GetOrientation() ) / 10;

        // @todo there are a few more cases than these to contend with:
        if( (!txt->IsMirrored() && ( abs( degrees ) == 180 || abs( degrees ) == 270 ))
         || ( txt->IsMirrored() && ( degrees == 360 ) ) )
        {
            // ETEXT::TOP_RIGHT:
            txt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
            txt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
        }
    }
}


MODULE* EAGLE_PLUGIN::makeModule( wxXmlNode* aPackage, const wxString& aPkgName ) const
{
    std::unique_ptr<MODULE> m( new MODULE( m_board ) );

    LIB_ID fpID;
    fpID.Parse( aPkgName, LIB_ID::ID_PCB, true );
    m->SetFPID( fpID );

    // Get the first package item and iterate
    wxXmlNode* packageItem = aPackage->GetChildren();

    while( packageItem )
    {
        const wxString& itemName = packageItem->GetName();

        if( itemName == "description" )
            m->SetDescription( FROM_UTF8( packageItem->GetNodeContent().c_str() ) );

        else if( itemName == "wire" )
            packageWire( m.get(), packageItem );

        else if( itemName == "pad" )
            packagePad( m.get(), packageItem );

        else if( itemName == "text" )
            packageText( m.get(), packageItem );

        else if( itemName == "rectangle" )
            packageRectangle( m.get(), packageItem );

        else if( itemName == "polygon" )
            packagePolygon( m.get(), packageItem );

        else if( itemName == "circle" )
            packageCircle( m.get(), packageItem );

        else if( itemName == "hole" )
            packageHole( m.get(), packageItem, false );

        else if( itemName == "smd" )
            packageSMD( m.get(), packageItem );

        packageItem = packageItem->GetNext();
    }

    return m.release();
}


void EAGLE_PLUGIN::packageWire( MODULE* aModule, wxXmlNode* aTree ) const
{
    EWIRE        w( aTree );
    PCB_LAYER_ID layer = kicad_layer( w.layer );
    wxPoint      start( kicad_x( w.x1 ), kicad_y( w.y1 ) );
    wxPoint      end(   kicad_x( w.x2 ), kicad_y( w.y2 ) );
    int          width = w.width.ToPcbUnits();

    // FIXME: the cap attribute is ignored because kicad can't create lines
    //        with flat ends.
    EDGE_MODULE* dwg;

    if( !w.curve )
    {
        dwg = new EDGE_MODULE( aModule, S_SEGMENT );

        dwg->SetStart0( start );
        dwg->SetEnd0( end );
    }
    else
    {
        dwg = new EDGE_MODULE( aModule, S_ARC );
        wxPoint center = ConvertArcCenter( start, end, *w.curve );

        dwg->SetStart0( center );
        dwg->SetEnd0( start );
        dwg->SetAngle( *w.curve * -10.0 ); // KiCad rotates the other way
    }

    dwg->SetLayer( layer );
    dwg->SetWidth( width );
    dwg->SetDrawCoord();

    aModule->GraphicalItemsList().PushBack( dwg );
}


void EAGLE_PLUGIN::packagePad( MODULE* aModule, wxXmlNode* aTree ) const
{
    // this is thru hole technology here, no SMDs
    EPAD e( aTree );

    D_PAD* pad = new D_PAD( aModule );
    aModule->PadsList().PushBack( pad );
    transferPad( e, pad );

    pad->SetDrillSize( wxSize( e.drill.ToPcbUnits(), e.drill.ToPcbUnits() ) );
    pad->SetLayerSet( LSET::AllCuMask().set( B_Mask ).set( F_Mask ) );

    if( e.shape )
    {
        switch( *e.shape )
        {
        case EPAD::ROUND:
            wxASSERT( pad->GetShape() == PAD_SHAPE_CIRCLE );    // verify set in D_PAD constructor
            break;

        case EPAD::OCTAGON:
            // no KiCad octagonal pad shape, use PAD_CIRCLE for now.
            // pad->SetShape( PAD_OCTAGON );
            wxASSERT( pad->GetShape() == PAD_SHAPE_CIRCLE );    // verify set in D_PAD constructor
            break;

        case EPAD::LONG:
            pad->SetShape( PAD_SHAPE_OVAL );
            break;

        case EPAD::SQUARE:
            pad->SetShape( PAD_SHAPE_RECT );
            break;

        case EPAD::OFFSET:
            ;   // don't know what to do here.
        }
    }
    else
    {
        // if shape is not present, our default is circle and that matches their default "round"
    }

    if( e.diameter )
    {
        int diameter = e.diameter->ToPcbUnits();
        pad->SetSize( wxSize( diameter, diameter ) );
    }
    else
    {
        double drillz  = pad->GetDrillSize().x;
        double annulus = drillz * m_rules->rvPadTop;   // copper annulus, eagle "restring"
        annulus = eagleClamp( m_rules->rlMinPadTop, annulus, m_rules->rlMaxPadTop );
        int diameter = KiROUND( drillz + 2 * annulus );
        pad->SetSize( wxSize( KiROUND( diameter ), KiROUND( diameter ) ) );
    }

    if( pad->GetShape() == PAD_SHAPE_OVAL )
    {
        // The Eagle "long" pad is wider than it is tall,
        // m_elongation is percent elongation
        wxSize sz = pad->GetSize();
        sz.x = ( sz.x * ( 100 + m_rules->psElongationLong ) ) / 100;
        pad->SetSize( sz );
    }

    if( e.rot )
    {
        pad->SetOrientation( e.rot->degrees * 10 );
    }
}


void EAGLE_PLUGIN::packageText( MODULE* aModule, wxXmlNode* aTree ) const
{
    ETEXT        t( aTree );
    PCB_LAYER_ID layer = kicad_layer( t.layer );

    if( layer == UNDEFINED_LAYER )
    {
        layer = Cmts_User;
    }

    TEXTE_MODULE* txt;

    if( t.text == ">NAME" || t.text == ">name" )
        txt = &aModule->Reference();
    else if( t.text == ">VALUE" || t.text == ">value" )
        txt = &aModule->Value();
    else
    {
        // FIXME: graphical text items are rotated for some reason.
        txt = new TEXTE_MODULE( aModule );
        aModule->GraphicalItemsList().PushBack( txt );
    }

    txt->SetTimeStamp( EagleTimeStamp( aTree ) );
    txt->SetText( FROM_UTF8( t.text.c_str() ) );

    wxPoint pos( kicad_x( t.x ), kicad_y( t.y ) );

    txt->SetTextPos( pos );
    txt->SetPos0( pos - aModule->GetPosition() );

    txt->SetLayer( layer );
    txt->SetTextSize( kicad_fontz( t.size ) );

    double ratio = t.ratio ? *t.ratio : 8;  // DTD says 8 is default

    txt->SetThickness( t.size.ToPcbUnits() * ratio / 100 );

    int align = t.align ? *t.align : ETEXT::BOTTOM_LEFT;  // bottom-left is eagle default

    // An eagle package is never rotated, the DTD does not allow it.
    // angle -= aModule->GetOrienation();

    if( t.rot )
    {
        int sign = t.rot->mirror ? -1 : 1;
        txt->SetMirrored( t.rot->mirror );

        double degrees = t.rot->degrees;

        if( degrees == 90 || t.rot->spin )
            txt->SetTextAngle( sign * degrees * 10 );
        else if( degrees == 180 )
            align = ETEXT::TOP_RIGHT;
        else if( degrees == 270 )
        {
            align = ETEXT::TOP_RIGHT;
            txt->SetTextAngle( sign * 90 * 10 );
        }
    }

    switch( align )
    {
    case ETEXT::CENTER:
        // this was the default in pcbtxt's constructor
        break;

    case ETEXT::CENTER_LEFT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
        break;

    case ETEXT::CENTER_RIGHT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
        break;

    case ETEXT::TOP_CENTER:
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
        break;

    case ETEXT::TOP_LEFT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
        break;

    case ETEXT::TOP_RIGHT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_TOP );
        break;

    case ETEXT::BOTTOM_CENTER:
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
        break;

    case ETEXT::BOTTOM_LEFT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_LEFT );
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
        break;

    case ETEXT::BOTTOM_RIGHT:
        txt->SetHorizJustify( GR_TEXT_HJUSTIFY_RIGHT );
        txt->SetVertJustify( GR_TEXT_VJUSTIFY_BOTTOM );
        break;
    }
}


void EAGLE_PLUGIN::packageRectangle( MODULE* aModule, wxXmlNode* aTree ) const
{
    ERECT        r( aTree );
    PCB_LAYER_ID layer = kicad_layer( r.layer );
    EDGE_MODULE* dwg = new EDGE_MODULE( aModule, S_POLYGON );

    aModule->GraphicalItemsList().PushBack( dwg );

    dwg->SetLayer( layer );
    dwg->SetWidth( 0 );

    dwg->SetTimeStamp( EagleTimeStamp( aTree ) );

    std::vector<wxPoint> pts;

    wxPoint start( wxPoint( kicad_x( r.x1 ), kicad_y( r.y1 ) ) );
    wxPoint end(   wxPoint( kicad_x( r.x1 ), kicad_y( r.y2 ) ) );

    pts.push_back( start );
    pts.push_back( wxPoint( kicad_x( r.x2 ), kicad_y( r.y1 ) ) );
    pts.push_back( wxPoint( kicad_x( r.x2 ), kicad_y( r.y2 ) ) );
    pts.push_back( end );

    dwg->SetPolyPoints( pts );

    dwg->SetStart0( start );
    dwg->SetEnd0( end );

    if( r.rot )
    {
        dwg->Rotate( dwg->GetCenter(), r.rot->degrees * 10 );
    }
}


void EAGLE_PLUGIN::packagePolygon( MODULE* aModule, wxXmlNode* aTree ) const
{
    EPOLYGON      p( aTree );
    PCB_LAYER_ID  layer = kicad_layer( p.layer );
    EDGE_MODULE*  dwg = new EDGE_MODULE( aModule, S_POLYGON );

    aModule->GraphicalItemsList().PushBack( dwg );

    dwg->SetWidth( 0 );     // it's filled, no need for boundary width
    dwg->SetLayer( layer );
    dwg->SetTimeStamp( EagleTimeStamp( aTree ) );

    std::vector<wxPoint> pts;
    // TODO: I think there's no way to know a priori the number of children in wxXmlNode :()
    // pts.reserve( aTree.size() );

    // Get the first vertex and iterate
    wxXmlNode* vertex = aTree->GetChildren();
    std::vector<EVERTEX> vertices;

    // Create a circular vector of vertices
    // The "curve" parameter indicates a curve from the current
    // to the next vertex, so we keep the first at the end as well
    // to allow the curve to link back
    while( vertex )
    {
        if( vertex->GetName() == "vertex" )
            vertices.push_back( EVERTEX( vertex ) );

        vertex = vertex->GetNext();
    }

    vertices.push_back( vertices[0] );

    for( size_t i = 0; i < vertices.size() - 1; i++ )
    {
        EVERTEX v1 = vertices[i];

        // Append the corner
        pts.push_back( wxPoint( kicad_x( v1.x ), kicad_y( v1.y ) ) );

        if( v1.curve )
        {
            EVERTEX v2 = vertices[i + 1];
            wxPoint center = ConvertArcCenter(
                    wxPoint( kicad_x( v1.x ), kicad_y( v1.y ) ),
                    wxPoint( kicad_x( v2.x ), kicad_y( v2.y ) ), *v1.curve );
            double angle = DEG2RAD( *v1.curve );
            double end_angle = atan2( kicad_y( v2.y ) - center.y,
                                      kicad_x( v2.x ) - center.x );
            double radius = sqrt( pow( center.x - kicad_x( v1.x ), 2 )
                                + pow( center.y - kicad_y( v1.y ), 2 ) );

            // If we are curving, we need at least 2 segments otherwise
            // delta_angle == angle
            double delta_angle = angle / std::max(
                            2, GetArcToSegmentCount( KiROUND( radius ),
                            ARC_HIGH_DEF, *v1.curve ) - 1 );

            for( double a = end_angle + angle;
                    fabs( a - end_angle ) > fabs( delta_angle );
                    a -= delta_angle )
            {
                pts.push_back(
                        wxPoint( KiROUND( radius * cos( a ) ),
                                 KiROUND( radius * sin( a ) ) ) + center );
            }
        }
    }

    dwg->SetPolyPoints( pts );
    dwg->SetStart0( *pts.begin() );
    dwg->SetEnd0( pts.back() );
    dwg->SetDrawCoord();
}


void EAGLE_PLUGIN::packageCircle( MODULE* aModule, wxXmlNode* aTree ) const
{
    ECIRCLE         e( aTree );
    PCB_LAYER_ID    layer = kicad_layer( e.layer );
    EDGE_MODULE*    gr = new EDGE_MODULE( aModule, S_CIRCLE );

    aModule->GraphicalItemsList().PushBack( gr );

    gr->SetWidth( e.width.ToPcbUnits() );

    switch( (int) layer )
    {
    case UNDEFINED_LAYER:   layer = Cmts_User;          break;
    /*
    case Eco1_User:            layer = F_SilkS; break;
    case Eco2_User:            layer = B_SilkS;  break;
    */
    default:
                            break;
    }

    gr->SetLayer( layer );
    gr->SetTimeStamp( EagleTimeStamp( aTree ) );
    gr->SetStart0( wxPoint( kicad_x( e.x ), kicad_y( e.y ) ) );
    gr->SetEnd0( wxPoint( kicad_x( e.x + e.radius ), kicad_y( e.y ) ) );
    gr->SetDrawCoord();
}


void EAGLE_PLUGIN::packageHole( MODULE* aModule, wxXmlNode* aTree, bool aCenter ) const
{
    EHOLE   e( aTree );

    // we add a PAD_ATTRIB_HOLE_NOT_PLATED pad to this module.
    D_PAD* pad = new D_PAD( aModule );
    aModule->PadsList().PushBack( pad );

    pad->SetShape( PAD_SHAPE_CIRCLE );
    pad->SetAttribute( PAD_ATTRIB_HOLE_NOT_PLATED );

    // Mechanical purpose only:
    // no offset, no net name, no pad name allowed
    // pad->SetOffset( wxPoint( 0, 0 ) );
    // pad->SetName( wxEmptyString );

    wxPoint padpos( kicad_x( e.x ), kicad_y( e.y ) );

    if( aCenter )
    {
        pad->SetPos0( wxPoint( 0, 0 ) );
        aModule->SetPosition( padpos );
        pad->SetPosition( padpos );
    }
    else
    {
        pad->SetPos0( padpos );
        pad->SetPosition( padpos + aModule->GetPosition() );
    }

    wxSize  sz( e.drill.ToPcbUnits(), e.drill.ToPcbUnits() );

    pad->SetDrillSize( sz );
    pad->SetSize( sz );

    pad->SetLayerSet( LSET::AllCuMask().set( B_Mask ).set( F_Mask ) );
}


void EAGLE_PLUGIN::packageSMD( MODULE* aModule, wxXmlNode* aTree ) const
{
    ESMD e( aTree );
    PCB_LAYER_ID layer = kicad_layer( e.layer );

    if( !IsCopperLayer( layer ) )
        return;

    D_PAD* pad = new D_PAD( aModule );
    aModule->PadsList().PushBack( pad );
    transferPad( e, pad );

    pad->SetShape( PAD_SHAPE_RECT );
    pad->SetAttribute( PAD_ATTRIB_SMD );

    wxSize padSize( e.dx.ToPcbUnits(), e.dy.ToPcbUnits() );
    pad->SetSize( padSize );
    pad->SetLayer( layer );

    const LSET front( 3, F_Cu, F_Paste, F_Mask );
    const LSET back(  3, B_Cu, B_Paste, B_Mask );

    if( layer == F_Cu )
        pad->SetLayerSet( front );
    else if( layer == B_Cu )
        pad->SetLayerSet( back );

    int minPadSize = std::min( padSize.x, padSize.y );

    // Rounded rectangle pads
    int roundRadius = eagleClamp( m_rules->srMinRoundness * 2,
            (int)( minPadSize * m_rules->srRoundness ), m_rules->srMaxRoundness * 2 );

    if( e.roundness || roundRadius > 0 )
    {
        double roundRatio = (double) roundRadius / minPadSize / 2.0;

        // Eagle uses a different definition of roundness, hence division by 200
        if( e.roundness )
            roundRatio = std::fmax( *e.roundness / 200.0, roundRatio );

        pad->SetShape( PAD_SHAPE_ROUNDRECT );
        pad->SetRoundRectRadiusRatio( roundRatio );
    }

    if( e.rot )
    {
        pad->SetOrientation( e.rot->degrees * 10 );
    }

    pad->SetLocalSolderPasteMargin( -eagleClamp( m_rules->mlMinCreamFrame,
                (int) ( m_rules->mvCreamFrame * minPadSize ),
                m_rules->mlMaxCreamFrame ) );

    // Solder paste (only for SMD pads)
    if( e.cream && *e.cream == false )         // enabled by default
    {
        if( layer == F_Cu )
            pad->SetLayerSet( pad->GetLayerSet().set( F_Paste, false ) );
        else if( layer == B_Cu )
            pad->SetLayerSet( pad->GetLayerSet().set( B_Paste, false ) );
    }
}


void EAGLE_PLUGIN::transferPad( const EPAD_COMMON& aEaglePad, D_PAD* aPad ) const
{
    aPad->SetName( FROM_UTF8( aEaglePad.name.c_str() ) );

    // pad's "Position" is not relative to the module's,
    // whereas Pos0 is relative to the module's but is the unrotated coordinate.
    wxPoint padPos( kicad_x( aEaglePad.x ), kicad_y( aEaglePad.y ) );
    aPad->SetPos0( padPos );

    // Solder mask
    const wxSize& padSize( aPad->GetSize() );

    if( !aEaglePad.stop || !*aEaglePad.stop )     // enabled by default
    {
        aPad->SetLocalSolderMaskMargin( eagleClamp( m_rules->mlMinStopFrame,
                    (int)( m_rules->mvStopFrame * std::min( padSize.x, padSize.y ) ),
                    m_rules->mlMaxStopFrame ) );
    }

    // Solid connection to copper zones
    if( aEaglePad.thermals && !*aEaglePad.thermals )
        aPad->SetZoneConnection( PAD_ZONE_CONN_FULL );

    MODULE* module = aPad->GetParent();
    wxCHECK( module, /* void */ );
    RotatePoint( &padPos, module->GetOrientation() );
    aPad->SetPosition( padPos + module->GetPosition() );
}


void EAGLE_PLUGIN::deleteTemplates()
{
    for( auto& t : m_templates )
        delete t.second;

    m_templates.clear();
}


void EAGLE_PLUGIN::loadSignals( wxXmlNode* aSignals )
{
    ZONES zones;      // per net

    m_xpath->push( "signals.signal", "name" );

    int netCode = 1;

    // Get the first signal and iterate
    wxXmlNode* net = aSignals->GetChildren();

    while( net )
    {
        bool    sawPad = false;

        zones.clear();

        const wxString& netName = escapeName( net->GetAttribute( "name" ) );
        m_board->Add( new NETINFO_ITEM( m_board, netName, netCode ) );

        m_xpath->Value( netName.c_str() );

        // Get the first net item and iterate
        wxXmlNode* netItem = net->GetChildren();

        // (contactref | polygon | wire | via)*
        while( netItem )
        {
            const wxString& itemName = netItem->GetName();

            if( itemName == "wire" )
            {
                m_xpath->push( "wire" );

                EWIRE        w( netItem );
                PCB_LAYER_ID layer = kicad_layer( w.layer );

                if( IsCopperLayer( layer ) )
                {
                    wxPoint start( kicad_x( w.x1 ), kicad_y( w.y1 ) );
                    double angle = 0.0;
                    double end_angle = 0.0;
                    double radius = 0.0;
                    double delta_angle = 0.0;
                    wxPoint center;

                    int width = w.width.ToPcbUnits();
                    if( width < m_min_trace )
                        m_min_trace = width;

                    if( w.curve )
                    {
                        center = ConvertArcCenter(
                                wxPoint( kicad_x( w.x1 ), kicad_y( w.y1 ) ),
                                wxPoint( kicad_x( w.x2 ), kicad_y( w.y2 ) ),
                                *w.curve );

                        angle = DEG2RAD( *w.curve );

                        end_angle = atan2( kicad_y( w.y2 ) - center.y,
                                           kicad_x( w.x2 ) - center.x );

                        radius = sqrt( pow( center.x - kicad_x( w.x1 ), 2 ) +
                                       pow( center.y - kicad_y( w.y1 ), 2 ) );

                        // If we are curving, we need at least 2 segments otherwise
                        // delta_angle == angle
                        int segments = std::max( 2, GetArcToSegmentCount( KiROUND( radius ),
                                ARC_HIGH_DEF, *w.curve ) - 1 );
                        delta_angle = angle / segments;
                    }

                    while( fabs( angle ) > fabs( delta_angle ) )
                    {
                        wxASSERT( radius > 0.0 );
                        wxPoint end( KiROUND( radius * cos( end_angle + angle ) + center.x ),
                                     KiROUND( radius * sin( end_angle + angle ) + center.y ) );

                        TRACK*  t = new TRACK( m_board );

                        t->SetTimeStamp( EagleTimeStamp( netItem ) + int( RAD2DEG( angle ) ) );
                        t->SetPosition( start );
                        t->SetEnd( end );
                        t->SetWidth( width );
                        t->SetLayer( layer );
                        t->SetNetCode( netCode );

                        m_board->m_Track.PushBack( t );

                        start = end;
                        angle -= delta_angle;
                    }

                    TRACK*  t = new TRACK( m_board );

                    t->SetTimeStamp( EagleTimeStamp( netItem ) );
                    t->SetPosition( start );
                    t->SetEnd( wxPoint( kicad_x( w.x2 ), kicad_y( w.y2 ) ) );
                    t->SetWidth( width );
                    t->SetLayer( layer );
                    t->SetNetCode( netCode );

                    m_board->m_Track.PushBack( t );
                }
                else
                {
                    // put non copper wires where the sun don't shine.
                }

                m_xpath->pop();
            }

            else if( itemName == "via" )
            {
                m_xpath->push( "via" );
                EVIA    v( netItem );

                PCB_LAYER_ID  layer_front_most = kicad_layer( v.layer_front_most );
                PCB_LAYER_ID  layer_back_most  = kicad_layer( v.layer_back_most );

                if( IsCopperLayer( layer_front_most ) &&
                    IsCopperLayer( layer_back_most ) )
                {
                    int  kidiam;
                    int  drillz = v.drill.ToPcbUnits();
                    VIA* via = new VIA( m_board );
                    m_board->m_Track.PushBack( via );

                    via->SetLayerPair( layer_front_most, layer_back_most );

                    if( v.diam )
                    {
                        kidiam = v.diam->ToPcbUnits();
                        via->SetWidth( kidiam );
                    }
                    else
                    {
                        double annulus = drillz * m_rules->rvViaOuter;  // eagle "restring"
                        annulus = eagleClamp( m_rules->rlMinViaOuter, annulus, m_rules->rlMaxViaOuter );
                        kidiam = KiROUND( drillz + 2 * annulus );
                        via->SetWidth( kidiam );
                    }

                    via->SetDrill( drillz );

                    // make sure the via diameter respects the restring rules

                    if( !v.diam || via->GetWidth() <= via->GetDrill() )
                    {
                        double annulus = eagleClamp( m_rules->rlMinViaOuter,
                                (double)( via->GetWidth() / 2 - via->GetDrill() ), m_rules->rlMaxViaOuter );
                        via->SetWidth( drillz + 2 * annulus );
                    }

                    if( kidiam < m_min_via )
                        m_min_via = kidiam;

                    if( drillz < m_min_via_hole )
                        m_min_via_hole = drillz;

                    if( layer_front_most == F_Cu && layer_back_most == B_Cu )
                        via->SetViaType( VIA_THROUGH );
                    else if( layer_front_most == F_Cu || layer_back_most == B_Cu )
                        via->SetViaType( VIA_MICROVIA );
                    else
                        via->SetViaType( VIA_BLIND_BURIED );

                    via->SetTimeStamp( EagleTimeStamp( netItem ) );

                    wxPoint pos( kicad_x( v.x ), kicad_y( v.y ) );

                    via->SetPosition( pos  );
                    via->SetEnd( pos );

                    via->SetNetCode( netCode );
                }

                m_xpath->pop();
            }

            else if( itemName == "contactref" )
            {
                m_xpath->push( "contactref" );
                // <contactref element="RN1" pad="7"/>

                const wxString& reference = netItem->GetAttribute( "element" );
                const wxString& pad       = netItem->GetAttribute( "pad" );
                wxString key = makeKey( reference, pad ) ;

                // D(printf( "adding refname:'%s' pad:'%s' netcode:%d netname:'%s'\n", reference.c_str(), pad.c_str(), netCode, netName.c_str() );)

                m_pads_to_nets[ key ] = ENET( netCode, netName );

                m_xpath->pop();

                sawPad = true;
            }

            else if( itemName == "polygon" )
            {
                m_xpath->push( "polygon" );
                auto* zone = loadPolygon( netItem );

                if( zone )
                {
                    zones.push_back( zone );

                    if( !zone->GetIsKeepout() )
                        zone->SetNetCode( netCode );
                }

                m_xpath->pop();     // "polygon"
            }

            netItem = netItem->GetNext();
        }

        if( zones.size() && !sawPad )
        {
            // KiCad does not support an unconnected zone with its own non-zero netcode,
            // but only when assigned netcode = 0 w/o a name...
            for( ZONES::iterator it = zones.begin();  it != zones.end();  ++it )
                (*it)->SetNetCode( NETINFO_LIST::UNCONNECTED );

            // therefore omit this signal/net.
        }
        else
            netCode++;

        // Get next signal
        net = net->GetNext();
    }

    m_xpath->pop();     // "signals.signal"
}


PCB_LAYER_ID EAGLE_PLUGIN::kicad_layer( int aEagleLayer ) const
{
    int kiLayer;

    // eagle copper layer:
    if( aEagleLayer >= 1 && aEagleLayer < int( DIM( m_cu_map ) ) )
    {
        kiLayer = m_cu_map[aEagleLayer];
    }

    else
    {
        // translate non-copper eagle layer to pcbnew layer
        switch( aEagleLayer )
        {
        // Eagle says "Dimension" layer, but it's for board perimeter
        case EAGLE_LAYER::MILLING:       kiLayer = Edge_Cuts;    break;
        case EAGLE_LAYER::DIMENSION:     kiLayer = Edge_Cuts;    break;

        case EAGLE_LAYER::TPLACE:        kiLayer = F_SilkS;      break;
        case EAGLE_LAYER::BPLACE:        kiLayer = B_SilkS;      break;
        case EAGLE_LAYER::TNAMES:        kiLayer = F_SilkS;      break;
        case EAGLE_LAYER::BNAMES:        kiLayer = B_SilkS;      break;
        case EAGLE_LAYER::TVALUES:       kiLayer = F_Fab;        break;
        case EAGLE_LAYER::BVALUES:       kiLayer = B_Fab;        break;
        case EAGLE_LAYER::TSTOP:         kiLayer = F_Mask;       break;
        case EAGLE_LAYER::BSTOP:         kiLayer = B_Mask;       break;
        case EAGLE_LAYER::TCREAM:        kiLayer = F_Paste;      break;
        case EAGLE_LAYER::BCREAM:        kiLayer = B_Paste;      break;
        case EAGLE_LAYER::TFINISH:       kiLayer = F_Mask;       break;
        case EAGLE_LAYER::BFINISH:       kiLayer = B_Mask;       break;
        case EAGLE_LAYER::TGLUE:         kiLayer = F_Adhes;      break;
        case EAGLE_LAYER::BGLUE:         kiLayer = B_Adhes;      break;
        case EAGLE_LAYER::DOCUMENT:      kiLayer = Cmts_User;    break;
        case EAGLE_LAYER::REFERENCELC:   kiLayer = Cmts_User;    break;
        case EAGLE_LAYER::REFERENCELS:   kiLayer = Cmts_User;    break;

        // Packages show the future chip pins on SMD parts using layer 51.
        // This is an area slightly smaller than the PAD/SMD copper area.
        // Carry those visual aids into the MODULE on the fabrication layer,
        // not silkscreen. This is perhaps not perfect, but there is not a lot
        // of other suitable paired layers
        case EAGLE_LAYER::TDOCU:         kiLayer = F_Fab;        break;
        case EAGLE_LAYER::BDOCU:         kiLayer = B_Fab;        break;

        // thes layers are defined as user layers. put them on ECO layers
        case EAGLE_LAYER::USERLAYER1:    kiLayer = Eco1_User;    break;
        case EAGLE_LAYER::USERLAYER2:    kiLayer = Eco2_User;    break;

        case EAGLE_LAYER::UNROUTED:
        case EAGLE_LAYER::TKEEPOUT:
        case EAGLE_LAYER::BKEEPOUT:
        case EAGLE_LAYER::TTEST:
        case EAGLE_LAYER::BTEST:
        case EAGLE_LAYER::HOLES:
        default:
            // some layers do not map to KiCad
            wxLogMessage( wxString::Format( _( "Unsupported Eagle layer '%s' (%d), converted to Dwgs.User layer" ),
                    eagle_layer_name( aEagleLayer ), aEagleLayer ) );

            kiLayer = Dwgs_User;
            break;
        }
    }

    return PCB_LAYER_ID( kiLayer );
}


const wxString& EAGLE_PLUGIN::eagle_layer_name( int aLayer ) const
{
    static const wxString unknown( "unknown" );
    auto it = m_eagleLayers.find( aLayer );
    return it == m_eagleLayers.end() ? unknown : it->second.name;
}


void EAGLE_PLUGIN::centerBoard()
{
    if( m_props )
    {
        UTF8 page_width;
        UTF8 page_height;

        if( m_props->Value( "page_width",  &page_width ) &&
            m_props->Value( "page_height", &page_height ) )
        {
            EDA_RECT bbbox = m_board->GetBoardEdgesBoundingBox();

            int w = atoi( page_width.c_str() );
            int h = atoi( page_height.c_str() );

            int desired_x = ( w - bbbox.GetWidth() )  / 2;
            int desired_y = ( h - bbbox.GetHeight() ) / 2;

            DBG(printf( "bbox.width:%d bbox.height:%d w:%d h:%d desired_x:%d desired_y:%d\n",
                bbbox.GetWidth(), bbbox.GetHeight(), w, h, desired_x, desired_y );)

            m_board->Move( wxPoint( desired_x - bbbox.GetX(), desired_y - bbbox.GetY() ) );
        }
    }
}


wxDateTime EAGLE_PLUGIN::getModificationTime( const wxString& aPath )
{
    // File hasn't been loaded yet.
    if( aPath.IsEmpty() )
        return wxDateTime::Now();

    wxFileName  fn( aPath );

    if( fn.IsFileReadable() )
        return fn.GetModificationTime();
    else
        return wxDateTime( 0.0 );
}


void EAGLE_PLUGIN::cacheLib( const wxString& aLibPath )
{
    try
    {
        wxDateTime  modtime = getModificationTime( aLibPath );

        // Fixes assertions in wxWidgets debug builds for the wxDateTime object.  Refresh the
        // cache if either of the wxDateTime objects are invalid or the last file modification
        // time differs from the current file modification time.
        bool load = !m_mod_time.IsValid() || !modtime.IsValid() || m_mod_time != modtime;

        if( aLibPath != m_lib_path || load )
        {
            wxXmlNode*  doc;
            LOCALE_IO   toggle;     // toggles on, then off, the C locale.

            deleteTemplates();

            // Set this before completion of loading, since we rely on it for
            // text of an exception.  Delay setting m_mod_time until after successful load
            // however.
            m_lib_path = aLibPath;

            // 8 bit "filename" should be encoded according to disk filename encoding,
            // (maybe this is current locale, maybe not, its a filesystem issue),
            // and is not necessarily utf8.
            string filename = (const char*) aLibPath.char_str( wxConvFile );

            // Load the document
            wxXmlDocument xmlDocument;
            wxFileName fn( filename );

            if( !xmlDocument.Load( fn.GetFullPath() ) )
                THROW_IO_ERROR( wxString::Format( _( "Unable to read file \"%s\"" ),
                                                  fn.GetFullPath() ) );

            doc = xmlDocument.GetRoot();

            wxXmlNode* drawing       = MapChildren( doc )["drawing"];
            NODE_MAP drawingChildren = MapChildren( drawing );

            // clear the cu map and then rebuild it.
            clear_cu_map();

            m_xpath->push( "eagle.drawing.layers" );
            wxXmlNode* layers  = drawingChildren["layers"];
            loadLayerDefs( layers );
            m_xpath->pop();

            m_xpath->push( "eagle.drawing.library" );
            wxXmlNode* library = drawingChildren["library"];
            loadLibrary( library, NULL );
            m_xpath->pop();

            m_mod_time = modtime;
        }
    }
    catch(...){}
    // TODO: Handle exceptions
    // catch( file_parser_error fpe )
    // {
    //     // for xml_parser_error, what() has the line number in it,
    //     // but no byte offset.  That should be an adequate error message.
    //     THROW_IO_ERROR( fpe.what() );
    // }
    //
    // // Class ptree_error is a base class for xml_parser_error & file_parser_error,
    // // so one catch should be OK for all errors.
    // catch( ptree_error pte )
    // {
    //     string errmsg = pte.what();
    //
    //     errmsg += " @\n";
    //     errmsg += m_xpath->Contents();
    //
    //     THROW_IO_ERROR( errmsg );
    // }
}


void EAGLE_PLUGIN::FootprintEnumerate( wxArrayString& aFootprintNames, const wxString& aLibraryPath,
                                       const PROPERTIES* aProperties )
{
    init( aProperties );

    cacheLib( aLibraryPath );

    for( MODULE_CITER it = m_templates.begin();  it != m_templates.end();  ++it )
        aFootprintNames.Add( FROM_UTF8( it->first.c_str() ) );
}


MODULE* EAGLE_PLUGIN::FootprintLoad( const wxString& aLibraryPath, const wxString& aFootprintName,
        const PROPERTIES* aProperties )
{
    init( aProperties );
    cacheLib( aLibraryPath );
    MODULE_CITER mi = m_templates.find( aFootprintName );

    if( mi == m_templates.end() )
        return NULL;

    // copy constructor to clone the template
    MODULE* ret = new MODULE( *mi->second );

    return ret;
}


void EAGLE_PLUGIN::FootprintLibOptions( PROPERTIES* aListToAppendTo ) const
{
    PLUGIN::FootprintLibOptions( aListToAppendTo );

    /*
    (*aListToAppendTo)["ignore_duplicates"] = UTF8( _(
        "Ignore duplicately named footprints within the same Eagle library. "
        "Only the first similarly named footprint will be loaded."
        ));
    */
}


/*
void EAGLE_PLUGIN::Save( const wxString& aFileName, BOARD* aBoard, const PROPERTIES* aProperties )
{
    // Eagle lovers apply here.
}


void EAGLE_PLUGIN::FootprintSave( const wxString& aLibraryPath, const MODULE* aFootprint, const PROPERTIES* aProperties )
{
}


void EAGLE_PLUGIN::FootprintDelete( const wxString& aLibraryPath, const wxString& aFootprintName )
{
}


void EAGLE_PLUGIN::FootprintLibCreate( const wxString& aLibraryPath, const PROPERTIES* aProperties )
{
}


bool EAGLE_PLUGIN::FootprintLibDelete( const wxString& aLibraryPath, const PROPERTIES* aProperties )
{
}


bool EAGLE_PLUGIN::IsFootprintLibWritable( const wxString& aLibraryPath )
{
    return true;
}

*/