sch_eagle_plugin.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 CERN
 * Copyright (C) 2017-2023 Kicad Developers, see AUTHORS.txt for contributors.
 *
 * @author Alejandro García Montoro <[email protected]>
 * @author Maciej Suminski <[email protected]>
 * @author Russell Oliver <[email protected]>
 *
 * 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 3
 * 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, see <http://www.gnu.org/licenses/>.
 */
 
#include <sch_plugins/eagle/sch_eagle_plugin.h>
 
#include <locale_io.h>
#include <string_utf8_map.h>
 
#include <algorithm>
#include <memory>
#include <wx/filename.h>
#include <wx/string.h>
#include <wx/tokenzr.h>
#include <wx/wfstream.h>
#include <wx/txtstrm.h>
#include <wx/xml/xml.h>
 
#include <symbol_library.h>
#include <plugins/eagle/eagle_parser.h>
#include <string_utils.h>
#include <gr_text.h>
#include <lib_shape.h>
#include <lib_id.h>
#include <lib_pin.h>
#include <lib_text.h>
#include <project.h>
#include <sch_bus_entry.h>
#include <sch_symbol.h>
#include <project/net_settings.h>
#include <sch_edit_frame.h>
#include <sch_junction.h>
#include <sch_plugins/legacy/sch_legacy_plugin.h>
#include <sch_marker.h>
#include <sch_screen.h>
#include <sch_shape.h>
#include <sch_sheet.h>
#include <sch_sheet_path.h>
#include <sch_label.h>
#include <schematic.h>
#include <symbol_lib_table.h>
#include <wildcards_and_files_ext.h>
#include <progress_reporter.h>
 
 
// Eagle schematic axes are aligned with x increasing left to right and Y increasing bottom to top
// KiCad schematic axes are aligned with x increasing left to right and Y increasing top to bottom.
 
using namespace std;
 
static const std::map<wxString, ELECTRICAL_PINTYPE> pinDirectionsMap = {
 { wxT( "sup" ), ELECTRICAL_PINTYPE::PT_POWER_IN },
 { wxT( "pas" ), ELECTRICAL_PINTYPE::PT_PASSIVE },
 { wxT( "out" ), ELECTRICAL_PINTYPE::PT_OUTPUT },
 { wxT( "in" ), ELECTRICAL_PINTYPE::PT_INPUT },
 { wxT( "nc" ), ELECTRICAL_PINTYPE::PT_NC },
 { wxT( "io" ), ELECTRICAL_PINTYPE::PT_BIDI },
 { wxT( "oc" ), ELECTRICAL_PINTYPE::PT_OPENCOLLECTOR },
 { wxT( "hiz" ), ELECTRICAL_PINTYPE::PT_TRISTATE },
 { wxT( "pwr" ), ELECTRICAL_PINTYPE::PT_POWER_IN },
};
 
 
static int countChildren( wxXmlNode* aCurrentNode, const wxString& aName )
{
 // Map node_name -> node_pointer
 int count = 0;
 
 // Loop through all children counting them if they match the given name
 aCurrentNode = aCurrentNode->GetChildren();
 
 while( aCurrentNode )
 {
 if( aCurrentNode->GetName() == aName )
 count++;
 
 // Get next child
 aCurrentNode = aCurrentNode->GetNext();
 }
 
 return count;
}
 
 
static BOX2I getSheetBbox( SCH_SHEET* aSheet )
{
 BOX2I bbox;
 
 for( SCH_ITEM* item : aSheet->GetScreen()->Items() )
 bbox.Merge( item->GetBoundingBox() );
 
 return bbox;
}
 
 
static inline wxString extractNetName( const wxString& aPinName )
{
 return aPinName.BeforeFirst( '@' );
}
 
 
SCH_SHEET* SCH_EAGLE_PLUGIN::getCurrentSheet()
{
 return m_sheetPath.Last();
}
 
 
SCH_SCREEN* SCH_EAGLE_PLUGIN::getCurrentScreen()
{
 SCH_SHEET* currentSheet = m_sheetPath.Last();
 wxCHECK( currentSheet, nullptr );
 return currentSheet->GetScreen();
}
 
 
wxString SCH_EAGLE_PLUGIN::getLibName()
{
 if( m_libName.IsEmpty() )
 {
 // Try to come up with a meaningful name
 m_libName = m_schematic->Prj().GetProjectName();
 
 if( m_libName.IsEmpty() )
 {
 wxFileName fn( m_rootSheet->GetFileName() );
 m_libName = fn.GetName();
 }
 
 if( m_libName.IsEmpty() )
 m_libName = wxT( "noname" );
 
 m_libName += wxT( "-eagle-import" );
 m_libName = LIB_ID::FixIllegalChars( m_libName, true );
 }
 
 return m_libName;
}
 
 
wxFileName SCH_EAGLE_PLUGIN::getLibFileName()
{
 wxFileName fn( m_schematic->Prj().GetProjectPath(), getLibName(), KiCadSymbolLibFileExtension );
 
 return fn;
}
 
 
void SCH_EAGLE_PLUGIN::loadLayerDefs( wxXmlNode* aLayers )
{
 std::vector<ELAYER> eagleLayers;
 
 // Get the first layer and iterate
 wxXmlNode* layerNode = aLayers->GetChildren();
 
 while( layerNode )
 {
 ELAYER elayer( layerNode );
 eagleLayers.push_back( elayer );
 
 layerNode = layerNode->GetNext();
 }
 
 // match layers based on their names
 for( const ELAYER& elayer : eagleLayers )
 {
 if( elayer.name == wxT( "Nets" ) )
 m_layerMap[elayer.number] = LAYER_WIRE;
 else if( elayer.name == wxT( "Info" ) || elayer.name == wxT( "Guide" ) )
 m_layerMap[elayer.number] = LAYER_NOTES;
 else if( elayer.name == wxT( "Busses" ) )
 m_layerMap[elayer.number] = LAYER_BUS;
 }
}
 
 
SCH_LAYER_ID SCH_EAGLE_PLUGIN::kiCadLayer( int aEagleLayer )
{
 auto it = m_layerMap.find( aEagleLayer );
 return it == m_layerMap.end() ? LAYER_NOTES : it->second;
}
 
 
// Return the KiCad symbol orientation based on eagle rotation degrees.
static SYMBOL_ORIENTATION_T kiCadComponentRotation( float eagleDegrees )
{
 int roti = int( eagleDegrees );
 
 switch( roti )
 {
 case 0: return SYM_ORIENT_0;
 case 90: return SYM_ORIENT_90;
 case 180: return SYM_ORIENT_180;
 case 270: return SYM_ORIENT_270;
 
 default:
 wxASSERT_MSG( false, wxString::Format( wxT( "Unhandled orientation (%d degrees)" ), roti ) );
 return SYM_ORIENT_0;
 }
}
 
 
// Calculate text alignment based on the given Eagle text alignment parameters.
static void eagleToKicadAlignment( EDA_TEXT* aText, int aEagleAlignment, int aRelDegress,
 bool aMirror, bool aSpin, int aAbsDegress )
{
 int align = aEagleAlignment;
 
 if( aRelDegress == 90 )
 {
 aText->SetTextAngle( ANGLE_VERTICAL );
 }
 else if( aRelDegress == 180 )
 align = -align;
 else if( aRelDegress == 270 )
 {
 aText->SetTextAngle( ANGLE_VERTICAL );
 align = -align;
 }
 
 if( aMirror == true )
 {
 if( aAbsDegress == 90 || aAbsDegress == 270 )
 {
 if( align == ETEXT::BOTTOM_RIGHT )
 align = ETEXT::TOP_RIGHT;
 else if( align == ETEXT::BOTTOM_LEFT )
 align = ETEXT::TOP_LEFT;
 else if( align == ETEXT::TOP_LEFT )
 align = ETEXT::BOTTOM_LEFT;
 else if( align == ETEXT::TOP_RIGHT )
 align = ETEXT::BOTTOM_RIGHT;
 }
 else if( aAbsDegress == 0 || aAbsDegress == 180 )
 {
 if( align == ETEXT::BOTTOM_RIGHT )
 align = ETEXT::BOTTOM_LEFT;
 else if( align == ETEXT::BOTTOM_LEFT )
 align = ETEXT::BOTTOM_RIGHT;
 else if( align == ETEXT::TOP_LEFT )
 align = ETEXT::TOP_RIGHT;
 else if( align == ETEXT::TOP_RIGHT )
 align = ETEXT::TOP_LEFT;
 else if( align == ETEXT::CENTER_LEFT )
 align = ETEXT::CENTER_RIGHT;
 else if( align == ETEXT::CENTER_RIGHT )
 align = ETEXT::CENTER_LEFT;
 }
 }
 
 switch( align )
 {
 case ETEXT::CENTER:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 break;
 
 case ETEXT::CENTER_LEFT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_LEFT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 break;
 
 case ETEXT::CENTER_RIGHT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_RIGHT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 break;
 
 case ETEXT::TOP_CENTER:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_TOP );
 break;
 
 case ETEXT::TOP_LEFT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_LEFT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_TOP );
 break;
 
 case ETEXT::TOP_RIGHT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_RIGHT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_TOP );
 break;
 
 case ETEXT::BOTTOM_CENTER:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_BOTTOM );
 break;
 
 case ETEXT::BOTTOM_LEFT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_LEFT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_BOTTOM );
  break;
 
 case ETEXT::BOTTOM_RIGHT:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_RIGHT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_BOTTOM );
 break;
 
 default:
 aText->SetHorizJustify( GR_TEXT_H_ALIGN_RIGHT );
 aText->SetVertJustify( GR_TEXT_V_ALIGN_BOTTOM );
 break;
 }
}
 
 
SCH_EAGLE_PLUGIN::SCH_EAGLE_PLUGIN() :
 m_progressReporter( nullptr ),
 m_doneCount( 0 ),
 m_lastProgressCount( 0 ),
 m_totalCount( 0 )
{
 m_rootSheet = nullptr;
 m_schematic = nullptr;
 
 m_reporter = &WXLOG_REPORTER::GetInstance();
}
 
 
SCH_EAGLE_PLUGIN::~SCH_EAGLE_PLUGIN()
{
}
 
 
const wxString SCH_EAGLE_PLUGIN::GetName() const
{
 return wxT( "EAGLE" );
}
 
 
const wxString SCH_EAGLE_PLUGIN::GetFileExtension() const
{
 return wxT( "sch" );
}
 
 
const wxString SCH_EAGLE_PLUGIN::GetLibraryFileExtension() const
{
 return wxT( "lbr" );
}
 
 
int SCH_EAGLE_PLUGIN::GetModifyHash() const
{
 return 0;
}
 
 
void SCH_EAGLE_PLUGIN::checkpoint()
{
 const unsigned PROGRESS_DELTA = 5;
 
 if( m_progressReporter )
 {
 if( ++m_doneCount > m_lastProgressCount + PROGRESS_DELTA )
 {
 m_progressReporter->SetCurrentProgress( ( (double) m_doneCount )
 / std::max( 1U, m_totalCount ) );
 
 if( !m_progressReporter->KeepRefreshing() )
 THROW_IO_ERROR( ( "Open canceled by user." ) );
 
 m_lastProgressCount = m_doneCount;
 }
 }
}
 
 
SCH_SHEET* SCH_EAGLE_PLUGIN::Load( const wxString& aFileName, SCHEMATIC* aSchematic,
 SCH_SHEET* aAppendToMe, const STRING_UTF8_MAP* aProperties )
{
 wxASSERT( !aFileName || aSchematic != nullptr );
 LOCALE_IO toggle; // toggles on, then off, the C locale.
 
 m_filename = aFileName;
 m_schematic = aSchematic;
 
 if( m_progressReporter )
 {
 m_progressReporter->Report( wxString::Format( _( "Loading %s..." ), aFileName ) );
 
 if( !m_progressReporter->KeepRefreshing() )
 THROW_IO_ERROR( ( "Open canceled by user." ) );
 }
 
 // Load the document
 wxXmlDocument xmlDocument;
 wxFFileInputStream stream( m_filename.GetFullPath() );
 
 // read first line to check for Eagle XML format file
 wxTextInputStream text( stream );
 wxString line = text.ReadLine();
 if( !line.StartsWith( wxT( "<?xml" ) ) )
 {
 THROW_IO_ERROR( wxString::Format( _( "'%s' is an Eagle binary-format schematic file; "
 "only Eagle XML-format schematics can be imported." ),
 m_filename.GetFullPath() ) );
 }
 
 if( !stream.IsOk() || !xmlDocument.Load( stream ) )
 {
 THROW_IO_ERROR( wxString::Format( _( "Unable to read file '%s'." ),
 m_filename.GetFullPath() ) );
 }
 
 // Delete on exception, if I own m_rootSheet, according to aAppendToMe
 unique_ptr<SCH_SHEET> deleter( aAppendToMe ? nullptr : m_rootSheet );
 
 wxFileName newFilename( m_filename );
 newFilename.SetExt( KiCadSchematicFileExtension );
 
 if( aAppendToMe )
 {
 wxCHECK_MSG( aSchematic->IsValid(), nullptr,
 wxT( "Can't append to a schematic with no root!" ) );
 
 m_rootSheet = &aSchematic->Root();
 }
 else
 {
 m_rootSheet = new SCH_SHEET( aSchematic );
 m_rootSheet->SetFileName( newFilename.GetFullPath() );
 aSchematic->SetRoot( m_rootSheet );
 }
 
 if( !m_rootSheet->GetScreen() )
 {
 SCH_SCREEN* screen = new SCH_SCREEN( m_schematic );
 screen->SetFileName( newFilename.GetFullPath() );
 m_rootSheet->SetScreen( screen );
 
 // Virtual root sheet UUID must be the same as the schematic file UUID.
 const_cast<KIID&>( m_rootSheet->m_Uuid ) = screen->GetUuid();
 }
 
 SYMBOL_LIB_TABLE* libTable = m_schematic->Prj().SchSymbolLibTable();
 
 wxCHECK_MSG( libTable, nullptr, wxT( "Could not load symbol lib table." ) );
 
 m_pi.set( SCH_IO_MGR::FindPlugin( SCH_IO_MGR::SCH_KICAD ) );
 m_properties = std::make_unique<STRING_UTF8_MAP>();
 ( *m_properties )[SCH_LEGACY_PLUGIN::PropBuffering] = "";
 
 if( !libTable->HasLibrary( getLibName() ) )
 {
 // Create a new empty symbol library.
 m_pi->CreateSymbolLib( getLibFileName().GetFullPath() );
 wxString libTableUri = wxT( "${KIPRJMOD}/" ) + getLibFileName().GetFullName();
 
 // Add the new library to the project symbol library table.
 libTable->InsertRow( new SYMBOL_LIB_TABLE_ROW( getLibName(), libTableUri,
 wxT( "KiCad" ) ) );
 
 // Save project symbol library table.
 wxFileName fn( m_schematic->Prj().GetProjectPath(),
 SYMBOL_LIB_TABLE::GetSymbolLibTableFileName() );
 
 // So output formatter goes out of scope and closes the file before reloading.
 {
 FILE_OUTPUTFORMATTER formatter( fn.GetFullPath() );
 libTable->Format( &formatter, 0 );
 }
 
 // Reload the symbol library table.
 m_schematic->Prj().SetElem( PROJECT::ELEM_SYMBOL_LIB_TABLE, nullptr );
 m_schematic->Prj().SchSymbolLibTable();
 }
 
 // Retrieve the root as current node
 wxXmlNode* currentNode = xmlDocument.GetRoot();
 
 // If the attribute is found, store the Eagle version;
 // otherwise, store the dummy "0.0" version.
 m_version = currentNode->GetAttribute( wxT( "version" ), wxT( "0.0" ) );
 
 // Map all children into a readable dictionary
 NODE_MAP children = MapChildren( currentNode );
 
 // Load drawing
 loadDrawing( children["drawing"] );
 
 m_pi->SaveLibrary( getLibFileName().GetFullPath() );
 
 SCH_SCREENS allSheets( m_rootSheet );
 allSheets.UpdateSymbolLinks(); // Update all symbol library links for all sheets.
 
 return m_rootSheet;
}
 
 
void SCH_EAGLE_PLUGIN::loadDrawing( wxXmlNode* aDrawingNode )
{
 // Map all children into a readable dictionary
 NODE_MAP drawingChildren = MapChildren( aDrawingNode );
 
 // Board nodes should not appear in .sch files
 // wxXmlNode* board = drawingChildren["board"]
 
 // wxXmlNode* grid = drawingChildren["grid"]
 
 auto layers = drawingChildren["layers"];
 
 if( layers )
 loadLayerDefs( layers );
 
 // wxXmlNode* library = drawingChildren["library"]
 
 // wxXmlNode* settings = drawingChildren["settings"]
 
 // Load schematic
 auto schematic = drawingChildren["schematic"];
 
 if( schematic )
 loadSchematic( schematic );
}
 
 
void SCH_EAGLE_PLUGIN::countNets( wxXmlNode* aSchematicNode )
{
 // Map all children into a readable dictionary
 NODE_MAP schematicChildren = MapChildren( aSchematicNode );
 
 // Loop through all the sheets
 wxXmlNode* sheetNode = getChildrenNodes( schematicChildren, wxT( "sheets" ) );
 
 while( sheetNode )
 {
 NODE_MAP sheetChildren = MapChildren( sheetNode );
 
 // Loop through all nets
 // From the DTD: "Net is an electrical connection in a schematic."
 wxXmlNode* netNode = getChildrenNodes( sheetChildren, wxT( "nets" ) );
 
 while( netNode )
 {
 wxString netName = netNode->GetAttribute( wxT( "name" ) );
 
 if( m_netCounts.count( netName ) )
 m_netCounts[netName] = m_netCounts[netName] + 1;
 else
 m_netCounts[netName] = 1;
 
 // Get next net
 netNode = netNode->GetNext();
 }
 
 sheetNode = sheetNode->GetNext();
 }
}
 
 
void SCH_EAGLE_PLUGIN::loadSchematic( wxXmlNode* aSchematicNode )
{
 // Map all children into a readable dictionary
 NODE_MAP schematicChildren = MapChildren( aSchematicNode );
 wxXmlNode* partNode = getChildrenNodes( schematicChildren, wxT( "parts" ) );
 wxXmlNode* libraryNode = getChildrenNodes( schematicChildren, wxT( "libraries" ) );
 wxXmlNode* sheetNode = getChildrenNodes( schematicChildren, wxT( "sheets" ) );
 
 if( !sheetNode )
 return;
 
 auto count_nodes =
 []( wxXmlNode* aNode ) -> unsigned
 {
 unsigned count = 0;
 
 while( aNode )
 {
 count++;
 aNode = aNode->GetNext();
 }
 
 return count;
 };
 
 if( m_progressReporter )
 {
 m_totalCount = 0;
 m_doneCount = 0;
 
 m_totalCount += count_nodes( partNode );
 
 while( libraryNode )
 {
 NODE_MAP libraryChildren = MapChildren( libraryNode );
 wxXmlNode* devicesetNode = getChildrenNodes( libraryChildren, wxT( "devicesets" ) );
 
 while( devicesetNode )
 {
 NODE_MAP deviceSetChildren = MapChildren( devicesetNode );
 wxXmlNode* deviceNode = getChildrenNodes( deviceSetChildren, wxT( "devices" ) );
 wxXmlNode* gateNode = getChildrenNodes( deviceSetChildren, wxT( "gates" ) );
 
 m_totalCount += count_nodes( deviceNode ) * count_nodes( gateNode );
 
 devicesetNode = devicesetNode->GetNext();
 }
 
 libraryNode = libraryNode->GetNext();
 }
 
 // Rewind
 libraryNode = getChildrenNodes( schematicChildren, wxT( "libraries" ) );
 
 while( sheetNode )
 {
 NODE_MAP sheetChildren = MapChildren( sheetNode );
 
 m_totalCount += count_nodes( getChildrenNodes( sheetChildren, wxT( "instances" ) ) );
 m_totalCount += count_nodes( getChildrenNodes( sheetChildren, wxT( "busses" ) ) );
 m_totalCount += count_nodes( getChildrenNodes( sheetChildren, wxT( "nets" ) ) );
 m_totalCount += count_nodes( getChildrenNodes( sheetChildren, wxT( "plain" ) ) );
 
 sheetNode = sheetNode->GetNext();
 }
 
 // Rewind
 sheetNode = getChildrenNodes( schematicChildren, wxT( "sheets" ) );
 }
 
 while( partNode )
 {
 checkpoint();
 
 std::unique_ptr<EPART> epart = std::make_unique<EPART>( partNode );
 
 // N.B. Eagle parts are case-insensitive in matching but we keep the display case
 m_partlist[epart->name.Upper()] = std::move( epart );
 partNode = partNode->GetNext();
 }
 
 if( libraryNode )
 {
 while( libraryNode )
 {
 // Read the library name
 wxString libName = libraryNode->GetAttribute( wxT( "name" ) );
 
 EAGLE_LIBRARY* elib = &m_eagleLibs[libName];
 elib->name = libName;
 
 loadLibrary( libraryNode, &m_eagleLibs[libName] );
 
 libraryNode = libraryNode->GetNext();
 }
 
 m_pi->SaveLibrary( getLibFileName().GetFullPath() );
 }
 
 // find all nets and count how many sheets they appear on.
 // local labels will be used for nets found only on that sheet.
 countNets( aSchematicNode );
 
 // There is always at least a root sheet.
 m_sheetPath.push_back( m_rootSheet );
 m_sheetPath.SetPageNumber( wxT( "1" ) );
 
 int sheetCount = countChildren( sheetNode->GetParent(), wxT( "sheet" ) );
 
 if( sheetCount > 1 )
 {
 int x, y, i;
 i = 1;
 x = 1;
 y = 1;
 
 while( sheetNode )
 {
 VECTOR2I pos = VECTOR2I( x * schIUScale.MilsToIU( 1000 ),
 y * schIUScale.MilsToIU( 1000 ) );
 
 // Eagle schematics are never more than one sheet deep so the parent sheet is
 // always the root sheet.
 std::unique_ptr<SCH_SHEET> sheet = std::make_unique<SCH_SHEET>( m_rootSheet, pos );
 SCH_SCREEN* screen = new SCH_SCREEN( m_schematic );
 sheet->SetScreen( screen );
 screen->SetFileName( sheet->GetFileName() );
 
 wxCHECK2( sheet && screen, continue );
 
 wxString pageNo = wxString::Format( wxT( "%d" ), i );
 
 m_sheetPath.push_back( sheet.get() );
 loadSheet( sheetNode, i );
 
 m_sheetPath.SetPageNumber( pageNo );
 m_sheetPath.pop_back();
 
 SCH_SCREEN* currentScreen = m_rootSheet->GetScreen();
 
 wxCHECK2( currentScreen, continue );
 
 currentScreen->Append( sheet.release() );
 
 sheetNode = sheetNode->GetNext();
 x += 2;
 
 if( x > 10 ) // Start next row of sheets.
 {
 x = 1;
 y += 2;
 }
 
 i++;
 }
 }
 else
 {
 // There is only one sheet so we make that the root schematic.
 while( sheetNode )
 {
 loadSheet( sheetNode, 0 );
 sheetNode = sheetNode->GetNext();
 }
 }
 
 // Handle the missing symbol units that need to be instantiated
 // to create the missing implicit connections
 
 // Calculate the already placed items bounding box and the page size to determine
 // placement for the new symbols
 VECTOR2I pageSizeIU = m_rootSheet->GetScreen()->GetPageSettings().GetSizeIU( schIUScale.IU_PER_MILS );
 BOX2I sheetBbox = getSheetBbox( m_rootSheet );
 VECTOR2I newCmpPosition( sheetBbox.GetLeft(), sheetBbox.GetBottom() );
 int maxY = sheetBbox.GetY();
 
 SCH_SHEET_PATH sheetpath;
 m_rootSheet->LocatePathOfScreen( m_rootSheet->GetScreen(), &sheetpath );
 
 for( auto& cmp : m_missingCmps )
 {
 const SCH_SYMBOL* origSymbol = cmp.second.cmp;
 
 for( auto& unitEntry : cmp.second.units )
 {
 if( unitEntry.second == false )
 continue; // unit has been already processed
 
 // Instantiate the missing symbol unit
 int unit = unitEntry.first;
 const wxString reference = origSymbol->GetField( REFERENCE_FIELD )->GetText();
 std::unique_ptr<SCH_SYMBOL> symbol( (SCH_SYMBOL*) origSymbol->Duplicate() );
 
 symbol->SetUnitSelection( &sheetpath, unit );
 symbol->SetUnit( unit );
 symbol->SetOrientation( 0 );
 symbol->AddHierarchicalReference( sheetpath.Path(), reference, unit );
 
 // Calculate the placement position
 BOX2I cmpBbox = symbol->GetBoundingBox();
 int posY = newCmpPosition.y + cmpBbox.GetHeight();
 symbol->SetPosition( VECTOR2I( newCmpPosition.x, posY ) );
 newCmpPosition.x += cmpBbox.GetWidth();
 maxY = std::max( maxY, posY );
 
 if( newCmpPosition.x >= pageSizeIU.x ) // reached the page boundary?
 newCmpPosition = VECTOR2I( sheetBbox.GetLeft(), maxY ); // then start a new row
 
 // Add the global net labels to recreate the implicit connections
 addImplicitConnections( symbol.get(), m_rootSheet->GetScreen(), false );
 m_rootSheet->GetScreen()->Append( symbol.release() );
 }
 }
 
 m_missingCmps.clear();
}
 
 
void SCH_EAGLE_PLUGIN::loadSheet( wxXmlNode* aSheetNode, int aSheetIndex )
{
 // Map all children into a readable dictionary
 NODE_MAP sheetChildren = MapChildren( aSheetNode );
 
 // Get description node
 wxXmlNode* descriptionNode = getChildrenNodes( sheetChildren, wxT( "description" ) );
 
 SCH_SHEET* sheet = getCurrentSheet();
 
 wxCHECK( sheet, /* void */ );
 
 wxString des;
 std::string filename;
 SCH_FIELD& sheetNameField = sheet->GetFields()[SHEETNAME];
 SCH_FIELD& filenameField = sheet->GetFields()[SHEETFILENAME];
 
 if( descriptionNode )
 {
 des = descriptionNode->GetContent();
 des.Replace( wxT( "\n" ), wxT( "_" ), true );
 sheetNameField.SetText( des );
 filename = des.ToStdString();
 }
 else
 {
 filename = wxString::Format( wxT( "%s_%d" ), m_filename.GetName(), aSheetIndex );
 sheetNameField.SetText( filename );
 }
 
 ReplaceIllegalFileNameChars( &filename );
 replace( filename.begin(), filename.end(), ' ', '_' );
 
 wxFileName fn( m_filename );
 fn.SetName( filename );
 fn.SetExt( KiCadSchematicFileExtension );
 
 filenameField.SetText( fn.GetFullName() );
 
 SCH_SCREEN* screen = getCurrentScreen();
 
 wxCHECK( screen, /* void */ );
 
 screen->SetFileName( fn.GetFullPath() );
 sheet->AutoplaceFields( screen, true );
 
 // Loop through all of the symbol instances.
 wxXmlNode* instanceNode = getChildrenNodes( sheetChildren, wxT( "instances" ) );
 
 while( instanceNode )
 {
 checkpoint();
 
 loadInstance( instanceNode );
 instanceNode = instanceNode->GetNext();
 }
 
 // Loop through all buses
 // From the DTD: "Buses receive names which determine which signals they include.
 // A bus is a drawing object. It does not create any electrical connections.
 // These are always created by means of the nets and their names."
 wxXmlNode* busNode = getChildrenNodes( sheetChildren, wxT( "busses" ) );
 
 while( busNode )
 {
 checkpoint();
 
 // Get the bus name
 wxString busName = translateEagleBusName( busNode->GetAttribute( wxT( "name" ) ) );
 
 // Load segments of this bus
 loadSegments( busNode, busName, wxString() );
 
 // Get next bus
 busNode = busNode->GetNext();
 }
 
 // Loop through all nets
 // From the DTD: "Net is an electrical connection in a schematic."
 wxXmlNode* netNode = getChildrenNodes( sheetChildren, wxT( "nets" ) );
 
 while( netNode )
 {
 checkpoint();
 
 // Get the net name and class
 wxString netName = netNode->GetAttribute( wxT( "name" ) );
 wxString netClass = netNode->GetAttribute( wxT( "class" ) );
 
 // Load segments of this net
 loadSegments( netNode, netName, netClass );
 
 // Get next net
 netNode = netNode->GetNext();
 }
 
 adjustNetLabels(); // needs to be called before addBusEntries()
 addBusEntries();
 
 /* moduleinst is a design block definition and is an EagleCad 8 feature,
 *
 * // Loop through all moduleinsts
 * wxXmlNode* moduleinstNode = getChildrenNodes( sheetChildren, "moduleinsts" );
 *
 * while( moduleinstNode )
 * {
 * loadModuleinst( moduleinstNode );
 * moduleinstNode = moduleinstNode->GetNext();
 * }
 */
 
 wxXmlNode* plainNode = getChildrenNodes( sheetChildren, wxT( "plain" ) );
 
 while( plainNode )
 {
 checkpoint();
 
 wxString nodeName = plainNode->GetName();
 
 if( nodeName == wxT( "polygon" ) )
 {
 screen->Append( loadPolyLine( plainNode ) );
 }
 else if( nodeName == wxT( "wire" ) )
 {
 SEG endpoints;
 screen->Append( loadWire( plainNode, endpoints ) );
 }
 else if( nodeName == wxT( "text" ) )
 {
 screen->Append( loadPlainText( plainNode ) );
 }
 else if( nodeName == wxT( "circle" ) )
 {
 screen->Append( loadCircle( plainNode ) );
 }
 else if( nodeName == wxT( "rectangle" ) )
 {
 screen->Append( loadRectangle( plainNode ) );
 }
 else if( nodeName == wxT( "frame" ) )
 {
 std::vector<SCH_ITEM*> frameItems;
 
 loadFrame( plainNode, frameItems );
 
 for( SCH_ITEM* item : frameItems )
 screen->Append( item );
 }
 
 plainNode = plainNode->GetNext();
 }
 
 // Calculate the new sheet size.
 BOX2I sheetBoundingBox = getSheetBbox( sheet );
 VECTOR2I targetSheetSize = sheetBoundingBox.GetSize();
 targetSheetSize += VECTOR2I( schIUScale.MilsToIU( 1500 ), schIUScale.MilsToIU( 1500 ) );
 
 // Get current Eeschema sheet size.
 VECTOR2I pageSizeIU = screen->GetPageSettings().GetSizeIU( schIUScale.IU_PER_MILS );
 PAGE_INFO pageInfo = screen->GetPageSettings();
 
 // Increase if necessary
 if( pageSizeIU.x < targetSheetSize.x )
 pageInfo.SetWidthMils( schIUScale.IUToMils( targetSheetSize.x ) );
 
 if( pageSizeIU.y < targetSheetSize.y )
 pageInfo.SetHeightMils( schIUScale.IUToMils( targetSheetSize.y ) );
 
 // Set the new sheet size.
 screen->SetPageSettings( pageInfo );
 
 pageSizeIU = screen->GetPageSettings().GetSizeIU( schIUScale.IU_PER_MILS );
 VECTOR2I sheetcentre( pageSizeIU.x / 2, pageSizeIU.y / 2 );
 VECTOR2I itemsCentre = sheetBoundingBox.Centre();
 
 // round the translation to nearest 100mil to place it on the grid.
 VECTOR2I translation = sheetcentre - itemsCentre;
 translation.x = translation.x - translation.x % schIUScale.MilsToIU( 100 );
 translation.y = translation.y - translation.y % schIUScale.MilsToIU( 100 );
 
 // Add global net labels for the named power input pins in this sheet
 for( SCH_ITEM* item : screen->Items().OfType( SCH_SYMBOL_T ) )
 {
 SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( item );
 addImplicitConnections( symbol, screen, true );
 }
 
 m_connPoints.clear();
 
 // Translate the items.
 std::vector<SCH_ITEM*> allItems;
 
 std::copy( screen->Items().begin(), screen->Items().end(), std::back_inserter( allItems ) );
 
 for( SCH_ITEM* item : allItems )
 {
 item->SetPosition( item->GetPosition() + translation );
 
 // We don't read positions of Eagle label fields (primarily intersheet refs), so we
 // need to autoplace them after applying the translation.
 if( SCH_LABEL_BASE* label = dynamic_cast<SCH_LABEL_BASE*>( item ) )
 label->AutoplaceFields( screen, false );
 
 item->ClearFlags();
 screen->Update( item );
 
 }
}
 
 
void SCH_EAGLE_PLUGIN::loadFrame( wxXmlNode* aFrameNode, std::vector<SCH_ITEM*>& aItems )
{
 EFRAME eframe( aFrameNode );
 
 int xMin = eframe.x1.ToSchUnits();
 int xMax = eframe.x2.ToSchUnits();
 int yMin = -eframe.y1.ToSchUnits();
 int yMax = -eframe.y2.ToSchUnits();
 
 if( xMin > xMax )
 std::swap( xMin, xMax );
 
 if( yMin > yMax )
 std::swap( yMin, yMax );
 
 SCH_SHAPE* lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMin, yMin ) );
 lines->AddPoint( VECTOR2I( xMax, yMin ) );
 lines->AddPoint( VECTOR2I( xMax, yMax ) );
 lines->AddPoint( VECTOR2I( xMin, yMax ) );
 lines->AddPoint( VECTOR2I( xMin, yMin ) );
 aItems.push_back( lines );
 
 if( !( eframe.border_left == false ) )
 {
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int height = yMax - yMin;
 int x1 = xMin;
 int x2 = x1 + schIUScale.MilsToIU( 150 );
 int legendPosX = xMin + schIUScale.MilsToIU( 75 );
 double rowSpacing = height / double( eframe.rows );
 double legendPosY = yMin + ( rowSpacing / 2 );
 
 for( i = 1; i < eframe.rows; i++ )
 {
 int newY = KiROUND( yMin + ( rowSpacing * (double) i ) );
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( x1, newY ) );
 lines->AddPoint( VECTOR2I( x2, newY ) );
 aItems.push_back( lines );
 }
 
 char legendChar = 'A';
 
 for( i = 0; i < eframe.rows; i++ )
 {
 SCH_TEXT* legendText = new SCH_TEXT();
 legendText->SetPosition( VECTOR2I( legendPosX, KiROUND( legendPosY ) ) );
 legendText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 legendText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosY += rowSpacing;
 }
 }
 
 if( !( eframe.border_right == false ) )
 {
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int height = yMax - yMin;
 int x1 = xMax - schIUScale.MilsToIU( 150 );
 int x2 = xMax;
 int legendPosX = xMax - schIUScale.MilsToIU( 75 );
 double rowSpacing = height / double( eframe.rows );
 double legendPosY = yMin + ( rowSpacing / 2 );
 
 for( i = 1; i < eframe.rows; i++ )
 {
 int newY = KiROUND( yMin + ( rowSpacing * (double) i ) );
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( x1, newY ) );
 lines->AddPoint( VECTOR2I( x2, newY ) );
 aItems.push_back( lines );
 }
 
 char legendChar = 'A';
 
 for( i = 0; i < eframe.rows; i++ )
 {
 SCH_TEXT* legendText = new SCH_TEXT();
 legendText->SetPosition( VECTOR2I( legendPosX, KiROUND( legendPosY ) ) );
 legendText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 legendText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosY += rowSpacing;
 }
 }
 
 if( !( eframe.border_top == false ) )
 {
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int width = xMax - xMin;
 int y1 = yMin;
 int y2 = yMin + schIUScale.MilsToIU( 150 );
 int legendPosY = yMin + schIUScale.MilsToIU( 75 );
 double columnSpacing = width / double( eframe.columns );
 double legendPosX = xMin + ( columnSpacing / 2 );
 
 for( i = 1; i < eframe.columns; i++ )
 {
 int newX = KiROUND( xMin + ( columnSpacing * (double) i ) );
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( newX, y1 ) );
 lines->AddPoint( VECTOR2I( newX, y2 ) );
 aItems.push_back( lines );
 }
 
 char legendChar = '1';
 
 for( i = 0; i < eframe.columns; i++ )
 {
 SCH_TEXT* legendText = new SCH_TEXT();
 legendText->SetPosition( VECTOR2I( KiROUND( legendPosX ), legendPosY ) );
 legendText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 legendText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosX += columnSpacing;
 }
 }
 
 if( !( eframe.border_bottom == false ) )
 {
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int width = xMax - xMin;
 int y1 = yMax - schIUScale.MilsToIU( 150 );
 int y2 = yMax;
 int legendPosY = yMax - schIUScale.MilsToIU( 75 );
 double columnSpacing = width / double( eframe.columns );
 double legendPosX = xMin + ( columnSpacing / 2 );
 
 for( i = 1; i < eframe.columns; i++ )
 {
 int newX = KiROUND( xMin + ( columnSpacing * (double) i ) );
 lines = new SCH_SHAPE( SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( newX, y1 ) );
 lines->AddPoint( VECTOR2I( newX, y2 ) );
 aItems.push_back( lines );
 }
 
 char legendChar = '1';
 
 for( i = 0; i < eframe.columns; i++ )
 {
 SCH_TEXT* legendText = new SCH_TEXT();
 legendText->SetPosition( VECTOR2I( KiROUND( legendPosX ), legendPosY ) );
 legendText->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 legendText->SetVertJustify( GR_TEXT_V_ALIGN_CENTER );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosX += columnSpacing;
 }
 }
}
 
 
void SCH_EAGLE_PLUGIN::loadSegments( wxXmlNode* aSegmentsNode, const wxString& netName,
 const wxString& aNetClass )
{
 // Loop through all segments
 wxXmlNode* currentSegment = aSegmentsNode->GetChildren();
 SCH_SCREEN* screen = getCurrentScreen();
 
 wxCHECK( screen, /* void */ );
 
 int segmentCount = countChildren( aSegmentsNode, wxT( "segment" ) );
 
 while( currentSegment )
 {
 bool labelled = false; // has a label been added to this continuously connected segment
 NODE_MAP segmentChildren = MapChildren( currentSegment );
 bool firstWireFound = false;
 SEG firstWire;
 m_segments.emplace_back();
 SEG_DESC& segDesc = m_segments.back();
 
 // Loop through all segment children
 wxXmlNode* segmentAttribute = currentSegment->GetChildren();
 
 while( segmentAttribute )
 {
 if( segmentAttribute->GetName() == wxT( "wire" ) )
 {
 // TODO: Check how intersections used in adjustNetLabels should be
 // calculated - for now we pretend that all wires are line segments.
 SEG thisWire;
 SCH_ITEM* wire = loadWire( segmentAttribute, thisWire );
 m_connPoints[thisWire.A].emplace( wire );
 m_connPoints[thisWire.B].emplace( wire );
 
 if( !firstWireFound )
 {
 firstWire = thisWire;
 firstWireFound = true;
 }
 
 // Test for intersections with other wires
 for( SEG_DESC& desc : m_segments )
 {
 if( !desc.labels.empty() && desc.labels.front()->GetText() == netName )
 continue; // no point in saving intersections of the same net
 
 for( const SEG& seg : desc.segs )
 {
 OPT_VECTOR2I intersection = thisWire.Intersect( seg, true );
 
 if( intersection )
 m_wireIntersections.push_back( *intersection );
 }
 }
 
 segDesc.segs.push_back( thisWire );
 screen->Append( wire );
 }
 
 segmentAttribute = segmentAttribute->GetNext();
 }
 
 segmentAttribute = currentSegment->GetChildren();
 
 while( segmentAttribute )
 {
 wxString nodeName = segmentAttribute->GetName();
 
 if( nodeName == wxT( "junction" ) )
 {
 screen->Append( loadJunction( segmentAttribute ) );
 }
 else if( nodeName == wxT( "label" ) )
 {
 SCH_TEXT* label = loadLabel( segmentAttribute, netName );
 screen->Append( label );
 wxASSERT( segDesc.labels.empty()
 || segDesc.labels.front()->GetText() == label->GetText() );
 segDesc.labels.push_back( label );
 labelled = true;
 }
 else if( nodeName == wxT( "pinref" ) )
 {
 segmentAttribute->GetAttribute( wxT( "gate" ) ); // REQUIRED
 wxString part = segmentAttribute->GetAttribute( wxT( "part" ) ); // REQUIRED
 wxString pin = segmentAttribute->GetAttribute( wxT( "pin" ) ); // REQUIRED
 
 auto powerPort = m_powerPorts.find( wxT( "#" ) + part );
 
 if( powerPort != m_powerPorts.end()
 && powerPort->second == EscapeString( pin, CTX_NETNAME ) )
 {
 labelled = true;
 }
 }
 else if( nodeName == wxT( "wire" ) )
 {
 // already handled;
 }
 else // DEFAULT
 {
 // THROW_IO_ERROR( wxString::Format( _( "XML node '%s' unknown" ), nodeName ) );
 }
 
 // Get next segment attribute
 segmentAttribute = segmentAttribute->GetNext();
 }
 
 // Add a small label to the net segment if it hasn't been labeled already or is not
 // connect to a power symbol with a pin on the same net. This preserves the named net
 // feature of Eagle schematics.
 if( !labelled && firstWireFound )
 {
 std::unique_ptr<SCH_TEXT> label;
 
 // Add a global label if the net appears on more than one Eagle sheet
 if( m_netCounts[netName.ToStdString()] > 1 )
 label.reset( new SCH_GLOBALLABEL );
 else if( segmentCount > 1 )
 label.reset( new SCH_LABEL );
 
 if( label )
 {
 label->SetPosition( firstWire.A );
 label->SetText( escapeName( netName ) );
 label->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 40 ),
 schIUScale.MilsToIU( 40 ) ) );
 
 if( firstWire.B.x > firstWire.A.x )
 label->SetTextSpinStyle( TEXT_SPIN_STYLE::LEFT );
 else
 label->SetTextSpinStyle( TEXT_SPIN_STYLE::RIGHT );
 
 screen->Append( label.release() );
 }
 }
 
 currentSegment = currentSegment->GetNext();
 }
}
 
 
SCH_SHAPE* SCH_EAGLE_PLUGIN::loadPolyLine( wxXmlNode* aPolygonNode )
{
 std::unique_ptr<SCH_SHAPE> poly = std::make_unique<SCH_SHAPE>( SHAPE_T::POLY );
 EPOLYGON epoly( aPolygonNode );
 wxXmlNode* vertex = aPolygonNode->GetChildren();
 VECTOR2I pt, prev_pt;
 opt_double prev_curve;
 
 while( vertex )
 {
 if( vertex->GetName() == wxT( "vertex" ) ) // skip <xmlattr> node
 {
 EVERTEX evertex( vertex );
 pt = VECTOR2I( evertex.x.ToSchUnits(), -evertex.y.ToSchUnits() );
 
 if( prev_curve )
 {
 SHAPE_ARC arc;
 arc.ConstructFromStartEndAngle( prev_pt, pt, -EDA_ANGLE( *prev_curve, DEGREES_T ) );
 poly->GetPolyShape().Append( arc, -1, -1, ARC_ACCURACY );
 }
 else
 {
 poly->AddPoint( pt );
 }
 
 prev_pt = pt;
 prev_curve = evertex.curve;
 }
 
 vertex = vertex->GetNext();
 }
 
 poly->SetLayer( kiCadLayer( epoly.layer ) );
 poly->SetStroke( STROKE_PARAMS( epoly.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 poly->SetFillMode( FILL_T::FILLED_SHAPE );
 
 return poly.release();
}
 
 
SCH_ITEM* SCH_EAGLE_PLUGIN::loadWire( wxXmlNode* aWireNode, SEG& endpoints )
{
 EWIRE ewire = EWIRE( aWireNode );
 
 VECTOR2I start, end;
 
 start.x = ewire.x1.ToSchUnits();
 start.y = -ewire.y1.ToSchUnits();
 end.x = ewire.x2.ToSchUnits();
 end.y = -ewire.y2.ToSchUnits();
 // For segment wires.
 endpoints = SEG( start, end );
 
 if( ewire.curve )
 {
 std::unique_ptr<SCH_SHAPE> arc = std::make_unique<SCH_SHAPE>( SHAPE_T::ARC );
 
 VECTOR2I center = ConvertArcCenter( start, end, *ewire.curve );
 arc->SetCenter( center );
 arc->SetStart( start );
 arc->SetArcAngleAndEnd( -EDA_ANGLE( *ewire.curve, DEGREES_T ), true ); // KiCad rotates the other way
 arc->SetLayer( kiCadLayer( ewire.layer ) );
 arc->SetStroke( STROKE_PARAMS( ewire.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 
 return arc.release();
 }
 else
 {
 std::unique_ptr<SCH_LINE> line = std::make_unique<SCH_LINE>();
 
 line->SetStartPoint( start );
 line->SetEndPoint( end );
 line->SetLayer( kiCadLayer( ewire.layer ) );
 line->SetStroke( STROKE_PARAMS( ewire.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 
 return line.release();
 }
}
 
 
SCH_SHAPE* SCH_EAGLE_PLUGIN::loadCircle( wxXmlNode* aCircleNode )
{
 std::unique_ptr<SCH_SHAPE> circle = std::make_unique<SCH_SHAPE>( SHAPE_T::CIRCLE );
 ECIRCLE c( aCircleNode );
 VECTOR2I center( c.x.ToSchUnits(), -c.y.ToSchUnits() );
 
 circle->SetLayer( kiCadLayer( c.layer ) );
 circle->SetPosition( center );
 circle->SetEnd( VECTOR2I( center.x + c.radius.ToSchUnits(), center.y ) );
 circle->SetStroke( STROKE_PARAMS( c.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 
 return circle.release();
}
 
 
SCH_SHAPE* SCH_EAGLE_PLUGIN::loadRectangle( wxXmlNode* aRectNode )
{
 std::unique_ptr<SCH_SHAPE> rectangle = std::make_unique<SCH_SHAPE>( SHAPE_T::RECT );
 ERECT rect( aRectNode );
 
 rectangle->SetLayer( kiCadLayer( rect.layer ) );
 rectangle->SetPosition( VECTOR2I( rect.x1.ToSchUnits(), -rect.y1.ToSchUnits() ) );
 rectangle->SetEnd( VECTOR2I( rect.x2.ToSchUnits(), -rect.y2.ToSchUnits() ) );
 
 if( rect.rot )
 {
 VECTOR2I pos( rectangle->GetPosition() );
 VECTOR2I end( rectangle->GetEnd() );
 VECTOR2I center( rectangle->GetCenter() );
 
 RotatePoint( pos, center, EDA_ANGLE( rect.rot->degrees, DEGREES_T ) );
 RotatePoint( end, center, EDA_ANGLE( rect.rot->degrees, DEGREES_T ) );
 
 rectangle->SetPosition( pos );
 rectangle->SetEnd( end );
 }
 
 // Eagle rectangles are filled by definition.
 rectangle->SetFillMode( FILL_T::FILLED_SHAPE );
 
 return rectangle.release();
}
 
 
SCH_JUNCTION* SCH_EAGLE_PLUGIN::loadJunction( wxXmlNode* aJunction )
{
 std::unique_ptr<SCH_JUNCTION> junction = std::make_unique<SCH_JUNCTION>();
 
 EJUNCTION ejunction = EJUNCTION( aJunction );
 VECTOR2I pos( ejunction.x.ToSchUnits(), -ejunction.y.ToSchUnits() );
 
 junction->SetPosition( pos );
 
 return junction.release();
}
 
 
SCH_TEXT* SCH_EAGLE_PLUGIN::loadLabel( wxXmlNode* aLabelNode, const wxString& aNetName )
{
 ELABEL elabel = ELABEL( aLabelNode, aNetName );
 VECTOR2I elabelpos( elabel.x.ToSchUnits(), -elabel.y.ToSchUnits() );
 
 // Determine if the label is local or global depending on
 // the number of sheets the net appears in
 bool global = m_netCounts[aNetName] > 1;
 std::unique_ptr<SCH_TEXT> label;
 
 VECTOR2I textSize = VECTOR2I( KiROUND( elabel.size.ToSchUnits() * 0.7 ),
 KiROUND( elabel.size.ToSchUnits() * 0.7 ) );
 
 if( global )
 label = std::make_unique<SCH_GLOBALLABEL>();
 else
 label = std::make_unique<SCH_LABEL>();
 
 label->SetPosition( elabelpos );
 label->SetText( escapeName( elabel.netname ) );
 label->SetTextSize( textSize );
 label->SetTextSpinStyle( TEXT_SPIN_STYLE::RIGHT );
 
 if( elabel.rot )
 {
 for( int i = 0; i < KiROUND( elabel.rot->degrees / 90 ) %4; ++i )
 label->Rotate90( false );
 
 if( elabel.rot->mirror )
 label->MirrorSpinStyle( false );
 }
 
 return label.release();
}
 
 
std::pair<VECTOR2I, const SEG*>
SCH_EAGLE_PLUGIN::findNearestLinePoint( const VECTOR2I& aPoint,
 const std::vector<SEG>& aLines ) const
{
 VECTOR2I nearestPoint;
 const SEG* nearestLine = nullptr;
 
 float d, mindistance = std::numeric_limits<float>::max();
 
 // Find the nearest start, middle or end of a line from the list of lines.
 for( const SEG& line : aLines )
 {
 VECTOR2I testpoint = line.A;
 d = sqrt( abs( ( ( aPoint.x - testpoint.x ) ^ 2 ) + ( ( aPoint.y - testpoint.y ) ^ 2 ) ) );
 
 if( d < mindistance )
 {
 mindistance = d;
 nearestPoint = testpoint;
 nearestLine = &line;
 }
 
 testpoint = line.Center();
 d = sqrt( abs( ( ( aPoint.x - testpoint.x ) ^ 2 ) + ( ( aPoint.y - testpoint.y ) ^ 2 ) ) );
 
 if( d < mindistance )
 {
 mindistance = d;
 nearestPoint = testpoint;
 nearestLine = &line;
 }
 
 testpoint = line.B;
 d = sqrt( abs( ( ( aPoint.x - testpoint.x ) ^ 2 ) + ( ( aPoint.y - testpoint.y ) ^ 2 ) ) );
 
 if( d < mindistance )
 {
 mindistance = d;
 nearestPoint = testpoint;
 nearestLine = &line;
 }
 }
 
 return std::make_pair( nearestPoint, nearestLine );
}
 
 
void SCH_EAGLE_PLUGIN::loadInstance( wxXmlNode* aInstanceNode )
{
 EINSTANCE einstance = EINSTANCE( aInstanceNode );
 SCH_SCREEN* screen = getCurrentScreen();
 
 wxCHECK( screen, /* void */ );
 
 // Find the part in the list for the sheet.
 // Assign the symbol its value from the part entry
 // Calculate the unit number from the gate entry of the instance
 // Assign the LIB_ID from device set and device names
 auto part_it = m_partlist.find( einstance.part.Upper() );
 
 if( part_it == m_partlist.end() )
 {
 m_reporter->Report( wxString::Format( _( "Error parsing Eagle file. Could not find '%s' "
 "instance but it is referenced in the schematic." ),
 einstance.part ),
 RPT_SEVERITY_ERROR );
 
 return;
 }
 
 EPART* epart = part_it->second.get();
 
 wxString libraryname = epart->library;
 wxString gatename = epart->deviceset + epart->device + einstance.gate;
 wxString symbolname = wxString( epart->deviceset + epart->device );
 symbolname.Replace( wxT( "*" ), wxEmptyString );
 wxString kisymbolname = EscapeString( symbolname, CTX_LIBID );
 
 // Eagle schematics can have multiple libraries containing symbols with duplicate symbol
 // names. Because this parser stores all of the symbols in a single library, the
 // loadSymbol() function, prefixed the original Eagle library name to the symbol name
 // in case of a name clash. Check for the prefixed symbol first. This ensures that
 // the correct library symbol gets mapped on load.
 wxString altSymbolName = libraryname + wxT( "_" ) + symbolname;
 altSymbolName = EscapeString( altSymbolName, CTX_LIBID );
 
 wxString libIdSymbolName = altSymbolName;
 
 int unit = m_eagleLibs[libraryname].GateUnit[gatename];
 
 wxString package;
 EAGLE_LIBRARY* elib = &m_eagleLibs[libraryname];
 
 auto p = elib->package.find( kisymbolname );
 
 if( p != elib->package.end() )
 package = p->second;
 
 LIB_SYMBOL* part = m_pi->LoadSymbol( getLibFileName().GetFullPath(), altSymbolName,
 m_properties.get() );
 
 if( !part )
 {
 part = m_pi->LoadSymbol( getLibFileName().GetFullPath(), kisymbolname,
 m_properties.get() );
 libIdSymbolName = kisymbolname;
 }
 
 if( !part )
 {
 m_reporter->Report( wxString::Format( _( "Could not find '%s' in the imported library." ),
 UnescapeString( kisymbolname ) ),
 RPT_SEVERITY_ERROR );
 return;
 }
 
 LIB_ID libId( getLibName(), libIdSymbolName );
 std::unique_ptr<SCH_SYMBOL> symbol = std::make_unique<SCH_SYMBOL>();
 symbol->SetLibId( libId );
 symbol->SetUnit( unit );
 symbol->SetPosition( VECTOR2I( einstance.x.ToSchUnits(), -einstance.y.ToSchUnits() ) );
 
 // assume that footprint library is identical to project name
 if( !package.IsEmpty() )
 {
 wxString footprint = m_schematic->Prj().GetProjectName() + wxT( ":" ) + package;
 symbol->GetField( FOOTPRINT_FIELD )->SetText( footprint );
 }
 
 if( einstance.rot )
 {
 symbol->SetOrientation( kiCadComponentRotation( einstance.rot->degrees ) );
 
 if( einstance.rot->mirror )
 symbol->MirrorHorizontally( einstance.x.ToSchUnits() );
 }
 
 std::vector<LIB_FIELD*> partFields;
 part->GetFields( partFields );
 
 for( const LIB_FIELD* field : partFields )
 {
 symbol->GetFieldById( field->GetId() )->ImportValues( *field );
 symbol->GetFieldById( field->GetId() )->SetTextPos( (VECTOR2I)symbol->GetPosition()
 + field->GetTextPos() );
 }
 
 // If there is no footprint assigned, then prepend the reference value
 // with a hash character to mute netlist updater complaints
 wxString reference = package.IsEmpty() ? '#' + einstance.part : einstance.part;
 
 // reference must end with a number but EAGLE does not enforce this
 if( reference.find_last_not_of( wxT( "0123456789" ) ) == ( reference.Length()-1 ) )
 reference.Append( wxT( "0" ) );
 
 // EAGLE allows references to be single digits. This breaks KiCad netlisting, which requires
 // parts to have non-digit + digit annotation. If the reference begins with a number,
 // we prepend 'UNK' (unknown) for the symbol designator
 if( reference.find_first_not_of( wxT( "0123456789" ) ) != 0 )
 reference.Prepend( wxT( "UNK" ) );
 
 // EAGLE allows designator to start with # but that is used in KiCad
 // for symbols which do not have a footprint
 if( einstance.part.find_first_not_of( wxT( "#" ) ) != 0 )
 reference.Prepend( wxT( "UNK" ) );
 
 SCH_FIELD* referenceField = symbol->GetField( REFERENCE_FIELD );
 referenceField->SetText( reference );
 referenceField->SetVisible( part->GetFieldById( REFERENCE_FIELD )->IsVisible() );
 
 SCH_FIELD* valueField = symbol->GetField( VALUE_FIELD );
 bool userValue = m_userValue.at( libIdSymbolName );
 valueField->SetVisible( part->GetFieldById( VALUE_FIELD )->IsVisible() );
 
 if( userValue && epart->value )
 {
 valueField->SetText( *epart->value );
 }
 else
 {
 valueField->SetText( kisymbolname );
 
 if( userValue )
 valueField->SetVisible( false );
 }
 
 for( const auto& [ attrName, attrValue ] : epart->attribute )
 {
 VECTOR2I newFieldPosition( 0, 0 );
 SCH_FIELD* lastField = symbol->GetFieldById( symbol->GetFieldCount() - 1 );
 
 if( lastField )
 newFieldPosition = lastField->GetPosition();
 
 SCH_FIELD newField( newFieldPosition, symbol->GetFieldCount(), symbol.get() );
 
 newField.SetName( attrName );
 newField.SetText( attrValue );
 newField.SetVisible( false );
 
 symbol->AddField( newField );
 }
 
 for( const auto& a : epart->variant )
 {
 SCH_FIELD* field = symbol->AddField( *symbol->GetField( VALUE_FIELD ) );
 field->SetName( wxT( "VARIANT_" ) + a.first );
 field->SetText( a.second );
 field->SetVisible( false );
 }
 
 bool valueAttributeFound = false;
 bool nameAttributeFound = false;
 
 wxXmlNode* attributeNode = aInstanceNode->GetChildren();
 
 // Parse attributes for the instance
 while( attributeNode )
 {
 if( attributeNode->GetName() == wxT( "attribute" ) )
 {
 EATTR attr = EATTR( attributeNode );
 SCH_FIELD* field = nullptr;
 
 if( attr.name.Lower() == wxT( "name" ) )
 {
 field = symbol->GetField( REFERENCE_FIELD );
 nameAttributeFound = true;
 }
 else if( attr.name.Lower() == wxT( "value" ) )
 {
 field = symbol->GetField( VALUE_FIELD );
 valueAttributeFound = true;
 }
 else
 {
 field = symbol->FindField( attr.name );
 
 if( field )
 field->SetVisible( false );
 }
 
 if( field )
 {
 
 field->SetPosition( VECTOR2I( attr.x->ToSchUnits(), -attr.y->ToSchUnits() ) );
 int align = attr.align ? *attr.align : ETEXT::BOTTOM_LEFT;
 int absdegrees = attr.rot ? attr.rot->degrees : 0;
 bool mirror = attr.rot ? attr.rot->mirror : false;
 
 if( einstance.rot && einstance.rot->mirror )
 mirror = !mirror;
 
 bool spin = attr.rot ? attr.rot->spin : false;
 
 if( attr.display == EATTR::Off || attr.display == EATTR::NAME )
 field->SetVisible( false );
 
 int rotation = einstance.rot ? einstance.rot->degrees : 0;
 int reldegrees = ( absdegrees - rotation + 360.0 );
 reldegrees %= 360;
 
 eagleToKicadAlignment( (EDA_TEXT*) field, align, reldegrees, mirror, spin,
 absdegrees );
 }
 }
 else if( attributeNode->GetName() == wxT( "variant" ) )
 {
 wxString variantName, fieldValue;
 
 if( attributeNode->GetAttribute( wxT( "name" ), &variantName )
  && attributeNode->GetAttribute( wxT( "value" ), &fieldValue ) )
 {
 SCH_FIELD field( VECTOR2I( 0, 0 ), -1, symbol.get() );
 field.SetName( wxT( "VARIANT_" ) + variantName );
 field.SetText( fieldValue );
 field.SetVisible( false );
 symbol->AddField( field );
 }
 }
 
 attributeNode = attributeNode->GetNext();
 }
 
 // Use the instance attribute to determine the reference and value field visibility.
 if( einstance.smashed && einstance.smashed.Get() )
 {
 if( !valueAttributeFound )
 symbol->GetField( VALUE_FIELD )->SetVisible( false );
 
 if( !nameAttributeFound )
 symbol->GetField( REFERENCE_FIELD )->SetVisible( false );
 }
 
 symbol->AddHierarchicalReference( m_sheetPath.Path(), reference, unit );
 
 // Save the pin positions
 SYMBOL_LIB_TABLE& schLibTable = *m_schematic->Prj().SchSymbolLibTable();
 LIB_SYMBOL* libSymbol = schLibTable.LoadSymbol( symbol->GetLibId() );
 
 wxCHECK( libSymbol, /*void*/ );
 
 symbol->SetLibSymbol( new LIB_SYMBOL( *libSymbol ) );
 
 std::vector<LIB_PIN*> pins;
 symbol->GetLibPins( pins );
 
 for( const LIB_PIN* pin : pins )
 m_connPoints[symbol->GetPinPhysicalPosition( pin )].emplace( pin );
 
 if( part->IsPower() )
 m_powerPorts[ reference ] = symbol->GetField( VALUE_FIELD )->GetText();
 
 symbol->ClearFlags();
 
 screen->Append( symbol.release() );
}
 
 
EAGLE_LIBRARY* SCH_EAGLE_PLUGIN::loadLibrary( wxXmlNode* aLibraryNode,
 EAGLE_LIBRARY* aEagleLibrary )
{
 NODE_MAP libraryChildren = MapChildren( aLibraryNode );
 
 // Loop through the symbols and load each of them
 wxXmlNode* symbolNode = getChildrenNodes( libraryChildren, wxT( "symbols" ) );
 
 while( symbolNode )
 {
 wxString symbolName = symbolNode->GetAttribute( wxT( "name" ) );
 aEagleLibrary->SymbolNodes[symbolName] = symbolNode;
 symbolNode = symbolNode->GetNext();
 }
 
 // Loop through the device sets and load each of them
 wxXmlNode* devicesetNode = getChildrenNodes( libraryChildren, wxT( "devicesets" ) );
 
 while( devicesetNode )
 {
 // Get Device set information
 EDEVICE_SET edeviceset = EDEVICE_SET( devicesetNode );
 
 wxString prefix = edeviceset.prefix ? edeviceset.prefix.Get() : wxString( wxT( "" ) );
 
 NODE_MAP deviceSetChildren = MapChildren( devicesetNode );
 wxXmlNode* deviceNode = getChildrenNodes( deviceSetChildren, wxT( "devices" ) );
 
 // For each device in the device set:
 while( deviceNode )
 {
 // Get device information
 EDEVICE edevice = EDEVICE( deviceNode );
 
 // Create symbol name from deviceset and device names.
 wxString symbolName = edeviceset.name + edevice.name;
 symbolName.Replace( wxT( "*" ), wxEmptyString );
 wxASSERT( !symbolName.IsEmpty() );
 symbolName = EscapeString( symbolName, CTX_LIBID );
 
 if( edevice.package )
 aEagleLibrary->package[symbolName] = edevice.package.Get();
 
 // Create KiCad symbol.
 std::unique_ptr<LIB_SYMBOL> libSymbol = std::make_unique<LIB_SYMBOL>( symbolName );
 
 // Process each gate in the deviceset for this device.
 wxXmlNode* gateNode = getChildrenNodes( deviceSetChildren, wxT( "gates" ) );
 int gates_count = countChildren( deviceSetChildren["gates"], wxT( "gate" ) );
 libSymbol->SetUnitCount( gates_count );
 libSymbol->LockUnits( true );
 
 LIB_FIELD* reference = libSymbol->GetFieldById( REFERENCE_FIELD );
 
 if( prefix.length() == 0 )
 {
 reference->SetVisible( false );
 }
 else
 {
 // If there is no footprint assigned, then prepend the reference value
 // with a hash character to mute netlist updater complaints
 reference->SetText( edevice.package ? prefix : '#' + prefix );
 }
 
 int gateindex = 1;
 bool ispower = false;
 
 while( gateNode )
 {
 checkpoint();
 
 EGATE egate = EGATE( gateNode );
 
 aEagleLibrary->GateUnit[edeviceset.name + edevice.name + egate.name] = gateindex;
 ispower = loadSymbol( aEagleLibrary->SymbolNodes[egate.symbol], libSymbol, &edevice,
 gateindex, egate.name );
 
 gateindex++;
 gateNode = gateNode->GetNext();
 } // gateNode
 
 libSymbol->SetUnitCount( gates_count );
 
 if( gates_count == 1 && ispower )
 libSymbol->SetPower();
 
 // Don't set the footprint field if no package is defined in the Eagle schematic.
 if( edevice.package )
 {
 // assume that footprint library is identical to project name
 wxString packageString = m_schematic->Prj().GetProjectName() + wxT( ":" ) +
 aEagleLibrary->package[symbolName];
 libSymbol->GetFootprintField().SetText( packageString );
 }
 
 wxString libName = libSymbol->GetName();
 libSymbol->SetName( libName );
 
 // If duplicate symbol names exist in multiple Eagle symbol libraries, prefix the
 // Eagle symbol library name to the symbol which should ensure that it is unique.
 if( m_pi->LoadSymbol( getLibFileName().GetFullPath(), libName ) )
 {
 libName = aEagleLibrary->name + wxT( "_" ) + libName;
 libName = EscapeString( libName, CTX_LIBID );
 libSymbol->SetName( libName );
 }
 
 m_pi->SaveSymbol( getLibFileName().GetFullPath(), new LIB_SYMBOL( *libSymbol.get() ),
 m_properties.get() );
 aEagleLibrary->KiCadSymbols.insert( libName, libSymbol.release() );
 
 // Store information on whether the value of VALUE_FIELD for a part should be
 // part/@value or part/@deviceset + part/@device.
 m_userValue.emplace( std::make_pair( libName,
 edeviceset.uservalue == true ) );
 
 deviceNode = deviceNode->GetNext();
 } // devicenode
 
 devicesetNode = devicesetNode->GetNext();
 } // devicesetNode
 
 return aEagleLibrary;
}
 
 
bool SCH_EAGLE_PLUGIN::loadSymbol( wxXmlNode* aSymbolNode, std::unique_ptr<LIB_SYMBOL>& aSymbol,
 EDEVICE* aDevice, int aGateNumber, const wxString& aGateName )
{
 wxString symbolName = aSymbolNode->GetAttribute( wxT( "name" ) );
 std::vector<LIB_ITEM*> items;
 
 wxXmlNode* currentNode = aSymbolNode->GetChildren();
 
 bool showRefDes = false;
 bool showValue = false;
 bool ispower = false;
 int pincount = 0;
 
 while( currentNode )
 {
 wxString nodeName = currentNode->GetName();
 
 if( nodeName == wxT( "circle" ) )
 {
 aSymbol->AddDrawItem( loadSymbolCircle( aSymbol, currentNode, aGateNumber ) );
 }
 else if( nodeName == wxT( "pin" ) )
 {
 EPIN ePin = EPIN( currentNode );
 std::unique_ptr<LIB_PIN> pin( loadPin( aSymbol, currentNode, &ePin, aGateNumber ) );
 pincount++;
 
 pin->SetType( ELECTRICAL_PINTYPE::PT_BIDI );
 
 if( ePin.direction )
 {
 for( const auto& pinDir : pinDirectionsMap )
 {
 if( ePin.direction->Lower() == pinDir.first )
 {
 pin->SetType( pinDir.second );
 
 if( pinDir.first == wxT( "sup" ) ) // power supply symbol
 ispower = true;
 
 break;
 }
 }
 }
 
 if( aDevice->connects.size() != 0 )
 {
 for( const ECONNECT& connect : aDevice->connects )
 {
 if( connect.gate == aGateName && pin->GetName() == connect.pin )
 {
 wxArrayString pads = wxSplit( wxString( connect.pad ), ' ' );
 
 pin->SetUnit( aGateNumber );
 pin->SetName( escapeName( pin->GetName() ) );
 
 if( pads.GetCount() > 1 )
 {
 pin->SetNumberTextSize( 0 );
 }
 
 for( unsigned i = 0; i < pads.GetCount(); i++ )
 {
 LIB_PIN* apin = new LIB_PIN( *pin );
 
 wxString padname( pads[i] );
 apin->SetNumber( padname );
 aSymbol->AddDrawItem( apin );
 }
 
 break;
 }
 }
 }
 else
 {
 pin->SetUnit( aGateNumber );
 pin->SetNumber( wxString::Format( wxT( "%i" ), pincount ) );
 aSymbol->AddDrawItem( pin.release() );
 }
 }
 else if( nodeName == wxT( "polygon" ) )
 {
 aSymbol->AddDrawItem( loadSymbolPolyLine( aSymbol, currentNode, aGateNumber ) );
 }
 else if( nodeName == wxT( "rectangle" ) )
 {
 aSymbol->AddDrawItem( loadSymbolRectangle( aSymbol, currentNode, aGateNumber ) );
 }
 else if( nodeName == wxT( "text" ) )
 {
 std::unique_ptr<LIB_TEXT> libtext( loadSymbolText( aSymbol, currentNode, aGateNumber ) );
 
 if( libtext->GetText() == wxT( "${REFERENCE}" ) )
 {
 // Move text & attributes to Reference field and discard LIB_TEXT item
 LIB_FIELD* field = aSymbol->GetFieldById( REFERENCE_FIELD );
 loadFieldAttributes( field, libtext.get() );
 
 // Show Reference field if Eagle reference was uppercase
 showRefDes = currentNode->GetNodeContent() == wxT( ">NAME" );
 }
 else if( libtext->GetText() == wxT( "${VALUE}" ) )
 {
 // Move text & attributes to Value field and discard LIB_TEXT item
 LIB_FIELD* field = aSymbol->GetFieldById( VALUE_FIELD );
 loadFieldAttributes( field, libtext.get() );
 
 // Show Value field if Eagle reference was uppercase
 showValue = currentNode->GetNodeContent() == wxT( ">VALUE" );
 }
 else
 {
 aSymbol->AddDrawItem( libtext.release() );
 }
 }
 else if( nodeName == wxT( "wire" ) )
 {
 aSymbol->AddDrawItem( loadSymbolWire( aSymbol, currentNode, aGateNumber ) );
 }
 else if( nodeName == wxT( "frame" ) )
 {
 std::vector<LIB_ITEM*> frameItems;
 
 loadFrame( currentNode, frameItems );
 
 for( LIB_ITEM* item : frameItems )
 {
 item->SetParent( aSymbol.get() );
 item->SetUnit( aGateNumber );
 aSymbol->AddDrawItem( item );
 }
 }
 
 /*
 * else if( nodeName == "description" )
 * {
 * }
 * else if( nodeName == "dimension" )
 * {
 * }
 */
 
 currentNode = currentNode->GetNext();
 }
 
 if( !showRefDes )
 aSymbol->GetFieldById( REFERENCE_FIELD )->SetVisible( false );
 
 if( !showValue )
 aSymbol->GetFieldById( VALUE_FIELD )->SetVisible( false );
 
 return pincount == 1 ? ispower : false;
}
 
 
LIB_SHAPE* SCH_EAGLE_PLUGIN::loadSymbolCircle( std::unique_ptr<LIB_SYMBOL>& aSymbol,
 wxXmlNode* aCircleNode, int aGateNumber )
{
 // Parse the circle properties
 ECIRCLE c( aCircleNode );
 LIB_SHAPE* circle = new LIB_SHAPE( aSymbol.get(), SHAPE_T::CIRCLE );
 VECTOR2I center( c.x.ToSchUnits(), c.y.ToSchUnits() );
 
 circle->SetPosition( center );
 circle->SetEnd( VECTOR2I( center.x + c.radius.ToSchUnits(), center.y ) );
 circle->SetStroke( STROKE_PARAMS( c.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 circle->SetUnit( aGateNumber );
 
 return circle;
}
 
 
LIB_SHAPE* SCH_EAGLE_PLUGIN::loadSymbolRectangle( std::unique_ptr<LIB_SYMBOL>& aSymbol,
 wxXmlNode* aRectNode, int aGateNumber )
{
 ERECT rect( aRectNode );
 LIB_SHAPE* rectangle = new LIB_SHAPE( aSymbol.get(), SHAPE_T::RECT );
 
 rectangle->SetPosition( VECTOR2I( rect.x1.ToSchUnits(), rect.y1.ToSchUnits() ) );
 rectangle->SetEnd( VECTOR2I( rect.x2.ToSchUnits(), rect.y2.ToSchUnits() ) );
 
 if( rect.rot )
 {
 VECTOR2I pos( rectangle->GetPosition() );
 VECTOR2I end( rectangle->GetEnd() );
 VECTOR2I center( rectangle->GetCenter() );
 
 RotatePoint( pos, center, EDA_ANGLE( rect.rot->degrees, DEGREES_T ) );
 RotatePoint( end, center, EDA_ANGLE( rect.rot->degrees, DEGREES_T ) );
 
 rectangle->SetPosition( pos );
 rectangle->SetEnd( end );
 }
 
 rectangle->SetUnit( aGateNumber );
 
 // Eagle rectangles are filled by definition.
 rectangle->SetFillMode( FILL_T::FILLED_SHAPE );
 
 return rectangle;
}
 
 
LIB_ITEM* SCH_EAGLE_PLUGIN::loadSymbolWire( std::unique_ptr<LIB_SYMBOL>& aSymbol,
 wxXmlNode* aWireNode, int aGateNumber )
{
 EWIRE ewire = EWIRE( aWireNode );
 
 VECTOR2I begin, end;
 
 begin.x = ewire.x1.ToSchUnits();
 begin.y = ewire.y1.ToSchUnits();
 end.x = ewire.x2.ToSchUnits();
 end.y = ewire.y2.ToSchUnits();
 
 if( begin == end )
 return nullptr;
 
 // if the wire is an arc
 if( ewire.curve )
 {
 LIB_SHAPE* arc = new LIB_SHAPE( aSymbol.get(), SHAPE_T::ARC );
 VECTOR2I center = ConvertArcCenter( begin, end, *ewire.curve * -1 );
 double radius = sqrt( ( ( center.x - begin.x ) * ( center.x - begin.x ) ) +
 ( ( center.y - begin.y ) * ( center.y - begin.y ) ) );
 
 // this emulates the filled semicircles created by a thick arc with flat ends caps.
 if( ewire.cap == EWIRE::FLAT && ewire.width.ToSchUnits() >= 2 * radius )
 {
 VECTOR2I centerStartVector = ( begin - center ) * ( ewire.width.ToSchUnits() / radius );
 begin = center + centerStartVector;
 
 arc->SetStroke( STROKE_PARAMS( 1, PLOT_DASH_TYPE::SOLID ) );
 arc->SetFillMode( FILL_T::FILLED_SHAPE );
 }
 else
 {
 arc->SetStroke( STROKE_PARAMS( ewire.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 }
 
 arc->SetCenter( center );
 arc->SetStart( begin );
 arc->SetArcAngleAndEnd( EDA_ANGLE( *ewire.curve, DEGREES_T ), true );
 arc->SetUnit( aGateNumber );
 
 return arc;
 }
 else
 {
 LIB_SHAPE* poly = new LIB_SHAPE( aSymbol.get(), SHAPE_T::POLY );
 
 poly->AddPoint( begin );
 poly->AddPoint( end );
 poly->SetUnit( aGateNumber );
 poly->SetStroke( STROKE_PARAMS( ewire.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 
 return poly;
 }
}
 
 
LIB_SHAPE* SCH_EAGLE_PLUGIN::loadSymbolPolyLine( std::unique_ptr<LIB_SYMBOL>& aSymbol,
 wxXmlNode* aPolygonNode, int aGateNumber )
{
 LIB_SHAPE* poly = new LIB_SHAPE( aSymbol.get(), SHAPE_T::POLY );
 EPOLYGON epoly( aPolygonNode );
 wxXmlNode* vertex = aPolygonNode->GetChildren();
 VECTOR2I pt, prev_pt;
 opt_double prev_curve;
 
 while( vertex )
 {
 if( vertex->GetName() == wxT( "vertex" ) ) // skip <xmlattr> node
 {
 EVERTEX evertex( vertex );
 pt = VECTOR2I( evertex.x.ToSchUnits(), evertex.y.ToSchUnits() );
 
 if( prev_curve )
 {
 SHAPE_ARC arc;
 arc.ConstructFromStartEndAngle( prev_pt, pt, -EDA_ANGLE( *prev_curve, DEGREES_T ) );
 poly->GetPolyShape().Append( arc, -1, -1, ARC_ACCURACY );
 }
 else
 {
 poly->AddPoint( pt );
 }
 
 prev_pt = pt;
 prev_curve = evertex.curve;
 }
 
 vertex = vertex->GetNext();
 }
 
 poly->SetStroke( STROKE_PARAMS( epoly.width.ToSchUnits(), PLOT_DASH_TYPE::SOLID ) );
 poly->SetFillMode( FILL_T::FILLED_SHAPE );
 poly->SetUnit( aGateNumber );
 
 return poly;
}
 
 
LIB_PIN* SCH_EAGLE_PLUGIN::loadPin( std::unique_ptr<LIB_SYMBOL>& aSymbol, wxXmlNode* aPin,
 EPIN* aEPin, int aGateNumber )
{
 std::unique_ptr<LIB_PIN> pin = std::make_unique<LIB_PIN>( aSymbol.get() );
 pin->SetPosition( VECTOR2I( aEPin->x.ToSchUnits(), aEPin->y.ToSchUnits() ) );
 pin->SetName( aEPin->name );
 pin->SetUnit( aGateNumber );
 
 int roti = aEPin->rot ? aEPin->rot->degrees : 0;
 
 switch( roti )
 {
 case 0: pin->SetOrientation( 'R' ); break;
 case 90: pin->SetOrientation( 'U' ); break;
 case 180: pin->SetOrientation( 'L' ); break;
 case 270: pin->SetOrientation( 'D' ); break;
 default: wxFAIL_MSG( wxString::Format( wxT( "Unhandled orientation (%d degrees)." ), roti ) );
 }
 
 pin->SetLength( schIUScale.MilsToIU( 300 ) ); // Default pin length when not defined.
 
 if( aEPin->length )
 {
 wxString length = aEPin->length.Get();
 
 if( length == wxT( "short" ) )
 pin->SetLength( schIUScale.MilsToIU( 100 ) );
 else if( length == wxT( "middle" ) )
 pin->SetLength( schIUScale.MilsToIU( 200 ) );
 else if( length == wxT( "long" ) )
 pin->SetLength( schIUScale.MilsToIU( 300 ) );
 else if( length == wxT( "point" ) )
 pin->SetLength( schIUScale.MilsToIU( 0 ) );
 }
 
 // emulate the visibility of pin elements
 if( aEPin->visible )
 {
 wxString visible = aEPin->visible.Get();
 
 if( visible == wxT( "off" ) )
 {
 pin->SetNameTextSize( 0 );
 pin->SetNumberTextSize( 0 );
 }
 else if( visible == wxT( "pad" ) )
 {
 pin->SetNameTextSize( 0 );
 }
 else if( visible == wxT( "pin" ) )
 {
 pin->SetNumberTextSize( 0 );
 }
 
 /*
 * else if( visible == wxT( "both" ) )
 * {
 * }
 */
 }
 
 if( aEPin->function )
 {
 wxString function = aEPin->function.Get();
 
 if( function == wxT( "dot" ) )
 pin->SetShape( GRAPHIC_PINSHAPE::INVERTED );
 else if( function == wxT( "clk" ) )
 pin->SetShape( GRAPHIC_PINSHAPE::CLOCK );
 else if( function == wxT( "dotclk" ) )
 pin->SetShape( GRAPHIC_PINSHAPE::INVERTED_CLOCK );
 }
 
 return pin.release();
}
 
 
LIB_TEXT* SCH_EAGLE_PLUGIN::loadSymbolText( std::unique_ptr<LIB_SYMBOL>& aSymbol,
 wxXmlNode* aLibText, int aGateNumber )
{
 std::unique_ptr<LIB_TEXT> libtext = std::make_unique<LIB_TEXT>( aSymbol.get() );
 ETEXT etext( aLibText );
 
 libtext->SetUnit( aGateNumber );
 libtext->SetPosition( VECTOR2I( etext.x.ToSchUnits(), etext.y.ToSchUnits() ) );
 
 const wxString& eagleText = aLibText->GetNodeContent();
 wxString adjustedText;
 wxStringTokenizer tokenizer( eagleText, "\r\n" );
 
 // Strip the whitespace from both ends of each line.
 while( tokenizer.HasMoreTokens() )
 {
 wxString tmp = interpretText( tokenizer.GetNextToken().Trim( true ).Trim( false ) );
 
 if( tokenizer.HasMoreTokens() )
 tmp += wxT( "\n" );
 
 adjustedText += tmp;
 }
 
 libtext->SetText( adjustedText.IsEmpty() ? wxString( wxT( "~" ) ) : adjustedText );
 loadTextAttributes( libtext.get(), etext );
 
 return libtext.release();
}
 
 
void SCH_EAGLE_PLUGIN::loadFrame( wxXmlNode* aFrameNode, std::vector<LIB_ITEM*>& aItems )
{
 EFRAME eframe( aFrameNode );
 
 int xMin = eframe.x1.ToSchUnits();
 int xMax = eframe.x2.ToSchUnits();
 int yMin = eframe.y1.ToSchUnits();
 int yMax = eframe.y2.ToSchUnits();
 
 if( xMin > xMax )
 std::swap( xMin, xMax );
 
 if( yMin > yMax )
 std::swap( yMin, yMax );
 
 LIB_SHAPE* lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMin, yMin ) );
 lines->AddPoint( VECTOR2I( xMax, yMin ) );
 lines->AddPoint( VECTOR2I( xMax, yMax ) );
 lines->AddPoint( VECTOR2I( xMin, yMax ) );
 lines->AddPoint( VECTOR2I( xMin, yMin ) );
 aItems.push_back( lines );
 
 if( !( eframe.border_left == false ) )
 {
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int height = yMax - yMin;
 int x1 = xMin;
 int x2 = x1 + schIUScale.MilsToIU( 150 );
 int legendPosX = xMin + schIUScale.MilsToIU( 75 );
 double rowSpacing = height / double( eframe.rows );
 double legendPosY = yMax - ( rowSpacing / 2 );
 
 for( i = 1; i < eframe.rows; i++ )
 {
 int newY = KiROUND( yMin + ( rowSpacing * (double) i ) );
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( x1, newY ) );
 lines->AddPoint( VECTOR2I( x2, newY ) );
 aItems.push_back( lines );
 }
 
 char legendChar = 'A';
 
 for( i = 0; i < eframe.rows; i++ )
 {
 LIB_TEXT* legendText = new LIB_TEXT( nullptr );
 legendText->SetPosition( VECTOR2I( legendPosX, KiROUND( legendPosY ) ) );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosY -= rowSpacing;
 }
 }
 
 if( !( eframe.border_right == false ) )
 {
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int height = yMax - yMin;
 int x1 = xMax - schIUScale.MilsToIU( 150 );
 int x2 = xMax;
 int legendPosX = xMax - schIUScale.MilsToIU( 75 );
 double rowSpacing = height / double( eframe.rows );
 double legendPosY = yMax - ( rowSpacing / 2 );
 
 for( i = 1; i < eframe.rows; i++ )
 {
 int newY = KiROUND( yMin + ( rowSpacing * (double) i ) );
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( x1, newY ) );
 lines->AddPoint( VECTOR2I( x2, newY ) );
 aItems.push_back( lines );
 }
 
 char legendChar = 'A';
 
 for( i = 0; i < eframe.rows; i++ )
 {
 LIB_TEXT* legendText = new LIB_TEXT( nullptr );
 legendText->SetPosition( VECTOR2I( legendPosX, KiROUND( legendPosY ) ) );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosY -= rowSpacing;
 }
 }
 
 if( !( eframe.border_top == false ) )
 {
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMax - schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int width = xMax - xMin;
 int y1 = yMin;
 int y2 = yMin + schIUScale.MilsToIU( 150 );
 int legendPosY = yMax - schIUScale.MilsToIU( 75 );
 double columnSpacing = width / double( eframe.columns );
 double legendPosX = xMin + ( columnSpacing / 2 );
 
 for( i = 1; i < eframe.columns; i++ )
 {
 int newX = KiROUND( xMin + ( columnSpacing * (double) i ) );
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( newX, y1 ) );
 lines->AddPoint( VECTOR2I( newX, y2 ) );
 aItems.push_back( lines );
 }
 
 char legendChar = '1';
 
 for( i = 0; i < eframe.columns; i++ )
 {
 LIB_TEXT* legendText = new LIB_TEXT( nullptr );
 legendText->SetPosition( VECTOR2I( KiROUND( legendPosX ), legendPosY ) );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosX += columnSpacing;
 }
 }
 
 if( !( eframe.border_bottom == false ) )
 {
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( xMax - schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 lines->AddPoint( VECTOR2I( xMin + schIUScale.MilsToIU( 150 ),
 yMin + schIUScale.MilsToIU( 150 ) ) );
 aItems.push_back( lines );
 
 int i;
 int width = xMax - xMin;
 int y1 = yMax - schIUScale.MilsToIU( 150 );
 int y2 = yMax;
 int legendPosY = yMin + schIUScale.MilsToIU( 75 );
 double columnSpacing = width / double( eframe.columns );
 double legendPosX = xMin + ( columnSpacing / 2 );
 
 for( i = 1; i < eframe.columns; i++ )
 {
 int newX = KiROUND( xMin + ( columnSpacing * (double) i ) );
 lines = new LIB_SHAPE( nullptr, SHAPE_T::POLY );
 lines->AddPoint( VECTOR2I( newX, y1 ) );
 lines->AddPoint( VECTOR2I( newX, y2 ) );
 aItems.push_back( lines );
 }
 
 char legendChar = '1';
 
 for( i = 0; i < eframe.columns; i++ )
 {
 LIB_TEXT* legendText = new LIB_TEXT( nullptr );
 legendText->SetPosition( VECTOR2I( KiROUND( legendPosX ), legendPosY ) );
 legendText->SetText( wxString( legendChar ) );
 legendText->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 90 ),
 schIUScale.MilsToIU( 100 ) ) );
 aItems.push_back( legendText );
 legendChar++;
 legendPosX += columnSpacing;
 }
 }
}
 
 
SCH_TEXT* SCH_EAGLE_PLUGIN::loadPlainText( wxXmlNode* aSchText )
{
 std::unique_ptr<SCH_TEXT> schtext = std::make_unique<SCH_TEXT>();
 ETEXT etext = ETEXT( aSchText );
 
 const wxString& eagleText = aSchText->GetNodeContent();
 wxString adjustedText;
 wxStringTokenizer tokenizer( eagleText, "\r\n" );
 
 // Strip the whitespace from both ends of each line.
 while( tokenizer.HasMoreTokens() )
  {
 wxString tmp = interpretText( tokenizer.GetNextToken().Trim( true ).Trim( false ) );
 
 if( tokenizer.HasMoreTokens() )
 tmp += wxT( "\n" );
 
 adjustedText += tmp;
 }
 
 schtext->SetText( adjustedText.IsEmpty() ? wxString( wxT( "\" \"" ) ) : escapeName( adjustedText ) );
 schtext->SetPosition( VECTOR2I( etext.x.ToSchUnits(), -etext.y.ToSchUnits() ) );
 loadTextAttributes( schtext.get(), etext );
 schtext->SetItalic( false );
 
 return schtext.release();
}
 
 
void SCH_EAGLE_PLUGIN::loadTextAttributes( EDA_TEXT* aText, const ETEXT& aAttribs ) const
{
 aText->SetTextSize( aAttribs.ConvertSize() );
 
 if( aAttribs.ratio )
 {
 if( aAttribs.ratio.CGet() > 12 )
 {
 aText->SetBold( true );
 aText->SetTextThickness( GetPenSizeForBold( aText->GetTextWidth() ) );
 }
 }
 
 int align = aAttribs.align ? *aAttribs.align : ETEXT::BOTTOM_LEFT;
 int degrees = aAttribs.rot ? aAttribs.rot->degrees : 0;
 bool mirror = aAttribs.rot ? aAttribs.rot->mirror : false;
 bool spin = aAttribs.rot ? aAttribs.rot->spin : false;
 
 eagleToKicadAlignment( aText, align, degrees, mirror, spin, 0 );
}
 
 
void SCH_EAGLE_PLUGIN::loadFieldAttributes( LIB_FIELD* aField, const LIB_TEXT* aText ) const
{
 aField->SetTextPos( aText->GetPosition() );
 aField->SetTextSize( aText->GetTextSize() );
 aField->SetTextAngle( aText->GetTextAngle() );
 aField->SetBold( aText->IsBold() );
 aField->SetVertJustify( aText->GetVertJustify() );
 aField->SetHorizJustify( aText->GetHorizJustify() );
}
 
 
void SCH_EAGLE_PLUGIN::adjustNetLabels()
{
 // Eagle supports detached labels, so a label does not need to be placed on a wire
 // to be associated with it. KiCad needs to move them, so the labels actually touch the
 // corresponding wires.
 
 // Sort the intersection points to speed up the search process
 std::sort( m_wireIntersections.begin(), m_wireIntersections.end() );
 
 auto onIntersection =
 [&]( const VECTOR2I& aPos )
 {
 return std::binary_search( m_wireIntersections.begin(),
 m_wireIntersections.end(), aPos );
 };
 
 for( SEG_DESC& segDesc : m_segments )
 {
 for( SCH_TEXT* label : segDesc.labels )
 {
 VECTOR2I labelPos( label->GetPosition() );
 const SEG* segAttached = segDesc.LabelAttached( label );
 
 if( segAttached && !onIntersection( labelPos ) )
 continue; // label is placed correctly
 
 // Move the label to the nearest wire
 if( !segAttached )
 {
 std::tie( labelPos, segAttached ) = findNearestLinePoint( label->GetPosition(),
 segDesc.segs );
 
 if( !segAttached ) // we cannot do anything
 continue;
 }
 
 // Create a vector pointing in the direction of the wire, 50 mils long
 VECTOR2I wireDirection( segAttached->B - segAttached->A );
 wireDirection = wireDirection.Resize( schIUScale.MilsToIU( 50 ) );
 const VECTOR2I origPos( labelPos );
 
 // Flags determining the search direction
 bool checkPositive = true, checkNegative = true, move = false;
 int trial = 0;
 
 // Be sure the label is not placed on a wire intersection
 while( ( !move || onIntersection( labelPos ) ) && ( checkPositive || checkNegative ) )
 {
 move = false;
 
 // Move along the attached wire to find the new label position
 if( trial % 2 == 1 )
 {
 labelPos = VECTOR2I( origPos + wireDirection * trial / 2 );
 move = checkPositive = segAttached->Contains( labelPos );
 }
 else
 {
 labelPos = VECTOR2I( origPos - wireDirection * trial / 2 );
 move = checkNegative = segAttached->Contains( labelPos );
 }
 
 ++trial;
 }
 
 if( move )
 label->SetPosition( VECTOR2I( labelPos ) );
 }
 }
 
 m_segments.clear();
 m_wireIntersections.clear();
}
 
 
bool SCH_EAGLE_PLUGIN::CheckHeader( const wxString& aFileName )
{
 // Open file and check first line
 wxTextFile tempFile;
 
 tempFile.Open( aFileName );
 wxString firstline;
 
 // read the first line
 firstline = tempFile.GetFirstLine();
 wxString secondline = tempFile.GetNextLine();
 wxString thirdline = tempFile.GetNextLine();
 tempFile.Close();
 
 return firstline.StartsWith( wxT( "<?xml" ) )
 && secondline.StartsWith( wxT( "<!DOCTYPE eagle SYSTEM" ) )
 && thirdline.StartsWith( wxT( "<eagle version" ) );
}
 
 
void SCH_EAGLE_PLUGIN::moveLabels( SCH_LINE* aWire, const VECTOR2I& aNewEndPoint )
{
 SCH_SCREEN* screen = getCurrentScreen();
 
 wxCHECK( screen, /* void */ );
 
 for( SCH_ITEM* item : screen->Items().Overlapping( aWire->GetBoundingBox() ) )
 {
 if( !item->IsType( { SCH_LABEL_LOCATE_ANY_T } ) )
 continue;
 
 if( TestSegmentHit( item->GetPosition(), aWire->GetStartPoint(), aWire->GetEndPoint(), 0 ) )
 item->SetPosition( aNewEndPoint );
 }
}
 
 
void SCH_EAGLE_PLUGIN::addBusEntries()
{
 // Add bus entry symbols
 // TODO: Cleanup this function and break into pieces
 
 // for each wire segment, compare each end with all busses.
 // If the wire end is found to end on a bus segment, place a bus entry symbol.
 
 std::vector<SCH_LINE*> buses;
 std::vector<SCH_LINE*> wires;
 
 SCH_SCREEN* screen = getCurrentScreen();
 
 wxCHECK( screen, /* void */ );
 
 for( SCH_ITEM* ii : screen->Items().OfType( SCH_LINE_T ) )
 {
 SCH_LINE* line = static_cast<SCH_LINE*>( ii );
 
 if( line->IsBus() )
 buses.push_back( line );
 else if( line->IsWire() )
 wires.push_back( line );
 }
 
 for( SCH_LINE* wire : wires )
 {
 VECTOR2I wireStart = wire->GetStartPoint();
 VECTOR2I wireEnd = wire->GetEndPoint();
 
 for( SCH_LINE* bus : buses )
 {
 VECTOR2I busStart = bus->GetStartPoint();
 VECTOR2I busEnd = bus->GetEndPoint();
 
 auto entrySize =
 []( int signX, int signY ) -> VECTOR2I
 {
 return VECTOR2I( schIUScale.MilsToIU( DEFAULT_SCH_ENTRY_SIZE ) * signX,
 schIUScale.MilsToIU( DEFAULT_SCH_ENTRY_SIZE ) * signY );
 };
 
 auto testBusHit =
 [&]( const VECTOR2I& aPt ) -> bool
 {
 return TestSegmentHit( aPt, busStart, busEnd, 0 );
 };
 
 if( wireStart.y == wireEnd.y && busStart.x == busEnd.x )
 {
 // Horizontal wire and vertical bus
 
 if( testBusHit( wireStart ) )
 {
 // Wire start is on the vertical bus
 
 if( wireEnd.x < busStart.x )
 {
 /* the end of the wire is to the left of the bus
 * ⎥⎢
 * ——————⎥⎢
 * ⎥⎢
 */
 VECTOR2I p = wireStart + entrySize( -1, 0 );
 
 if( testBusHit( wireStart + entrySize( 0, -1 ) ) )
 {
 /* there is room above the wire for the bus entry
 * ⎥⎢
 * _____/⎥⎢
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else if( testBusHit( wireStart + entrySize( 0, 1 ) ) )
 {
 /* there is room below the wire for the bus entry
 * _____ ⎥⎢
 * \⎥⎢
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireStart );
 screen->Append( marker );
 }
 }
 else
 {
 /* the wire end is to the right of the bus
 * ⎥⎢
 * ⎥⎢——————
 * ⎥⎢
 */
 VECTOR2I p = wireStart + entrySize( 1, 0 );
 
 if( testBusHit( wireStart + entrySize( 0, -1 ) ) )
 {
 /* There is room above the wire for the bus entry
 * ⎥⎢
 * ⎥⎢\_____
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p , 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else if( testBusHit( wireStart + entrySize( 0, 1 ) ) )
 {
 /* There is room below the wire for the bus entry
 * ⎥⎢ _____
 * ⎥⎢/
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireStart );
 screen->Append( marker );
 }
 }
 
 break;
 }
 else if( testBusHit( wireEnd ) )
 {
 // Wire end is on the vertical bus
 
 if( wireStart.x < busStart.x )
 {
 /* start of the wire is to the left of the bus
 * ⎥⎢
 * ——————⎥⎢
 * ⎥⎢
 */
 VECTOR2I p = wireEnd + entrySize( -1, 0 );
 
 if( testBusHit( wireEnd + entrySize( 0, -1 ) ) )
 {
 /* there is room above the wire for the bus entry
 * ⎥⎢
 * _____/⎥⎢
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else if( testBusHit( wireEnd + entrySize( 0, -1 ) ) )
 {
 /* there is room below the wire for the bus entry
 * _____ ⎥⎢
 * \⎥⎢
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, wireEnd + entrySize( -1, 0 ) );
 wire->SetEndPoint( wireEnd + entrySize( -1, 0 ) );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireEnd );
 screen->Append( marker );
 }
 }
 else
 {
 /* the start of the wire is to the right of the bus
 * ⎥⎢
 * ⎥⎢——————
 * ⎥⎢
 */
 VECTOR2I p = wireEnd + entrySize( 1, 0 );
 
 if( testBusHit( wireEnd + entrySize( 0, -1 ) ) )
 {
 /* There is room above the wire for the bus entry
 * ⎥⎢
 * ⎥⎢\_____
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else if( testBusHit( wireEnd + entrySize( 0, 1 ) ) )
 {
 /* There is room below the wire for the bus entry
 * ⎥⎢ _____
 * ⎥⎢/
 * ⎥⎢
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireEnd );
 screen->Append( marker );
 }
 }
 
 break;
 }
 }
 else if( wireStart.x == wireEnd.x && busStart.y == busEnd.y )
 {
 // Vertical wire and horizontal bus
 
 if( testBusHit( wireStart ) )
 {
 // Wire start is on the bus
 
 if( wireEnd.y < busStart.y )
 {
 /* the end of the wire is above the bus
 * |
 * |
 * |
 * =======
 */
 VECTOR2I p = wireStart + entrySize( 0, -1 );
 
 if( testBusHit( wireStart + entrySize( -1, 0 ) ) )
 {
 /* there is room to the left of the wire for the bus entry
 * |
 * |
 * /
 * =======
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else if( testBusHit( wireStart + entrySize( 1, 0 ) ) )
 {
 /* there is room to the right of the wire for the bus entry
 * |
 * |
 * \
 * =======
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireStart );
 screen->Append( marker );
 }
 }
 else
 {
 /* wire end is below the bus
 * =======
 * |
 * |
 * |
 */
 VECTOR2I p = wireStart + entrySize( 0, 1 );
 
 if( testBusHit( wireStart + entrySize( -1, 0 ) ) )
 {
 /* there is room to the left of the wire for the bus entry
 * =======
 * \
 * |
 * |
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else if( testBusHit( wireStart + entrySize( 1, 0 ) ) )
 {
 /* there is room to the right of the wire for the bus entry
 * =======
 * /
 * |
 * |
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireStart );
 screen->Append( marker );
 }
 }
 
 break;
 }
 else if( testBusHit( wireEnd ) )
 {
 // Wire end is on the bus
 
 if( wireStart.y < busStart.y )
 {
 /* the start of the wire is above the bus
 * |
 * |
 * |
 * =======
 */
 VECTOR2I p = wireEnd + entrySize( 0, -1 );
 
 if( testBusHit( wireEnd + entrySize( -1, 0 ) ) )
 {
 /* there is room to the left of the wire for the bus entry
 * |
 * |
 * /
 * =======
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else if( testBusHit( wireEnd + entrySize( 1, 0 ) ) )
 {
 /* there is room to the right of the wire for the bus entry
 * |
 * |
 * \
 * =======
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireEnd );
 screen->Append( marker );
 }
 }
 else
 {
 /* wire start is below the bus
 * =======
 * |
 * |
 * |
 */
 VECTOR2I p = wireEnd + entrySize( 0, 1 );
 
 if( testBusHit( wireEnd + entrySize( -1, 0 ) ) )
 {
 /* there is room to the left of the wire for the bus entry
 * =======
 * \
 * |
 * |
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else if( testBusHit( wireEnd + entrySize( 1, 0 ) ) )
 {
 /* there is room to the right of the wire for the bus entry
 * =======
 * /
 * |
 * |
 */
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else
 {
 auto ercItem = ERC_ITEM::Create( ERCE_BUS_ENTRY_NEEDED );
 SCH_MARKER* marker = new SCH_MARKER( ercItem, wireEnd );
 screen->Append( marker );
 }
 }
 
 break;
 }
 }
 else
 {
 // Wire isn't horizontal or vertical
 
 if( testBusHit( wireStart ) )
 {
 VECTOR2I wirevector = wireStart - wireEnd;
 
 if( wirevector.x > 0 )
 {
 if( wirevector.y > 0 )
 {
 VECTOR2I p = wireStart + entrySize( -1, -1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 VECTOR2I p = wireStart + entrySize( -1, 1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 }
 else
 {
 if( wirevector.y > 0 )
 {
 VECTOR2I p = wireStart + entrySize( 1, -1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 else
 {
 VECTOR2I p = wireStart + entrySize( 1, 1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetStartPoint( p );
 }
 }
 
 break;
 }
 else if( testBusHit( wireEnd ) )
 {
 VECTOR2I wirevector = wireStart - wireEnd;
 
 if( wirevector.x > 0 )
 {
 if( wirevector.y > 0 )
 {
 VECTOR2I p = wireEnd + entrySize( 1, 1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 4 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else
 {
 VECTOR2I p = wireEnd + entrySize( 1, -1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 3 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 }
 else
 {
 if( wirevector.y > 0 )
 {
 VECTOR2I p = wireEnd + entrySize( -1, 1 );
 SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 1 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 else
 {
 VECTOR2I p = wireEnd + entrySize( -1, -1 );
  SCH_BUS_WIRE_ENTRY* busEntry = new SCH_BUS_WIRE_ENTRY( p, 2 );
 busEntry->SetFlags( IS_NEW );
 screen->Append( busEntry );
 
 moveLabels( wire, p );
 wire->SetEndPoint( p );
 }
 }
 
 break;
 }
 }
 }
 }
}
 
 
const SEG* SCH_EAGLE_PLUGIN::SEG_DESC::LabelAttached( const SCH_TEXT* aLabel ) const
{
 VECTOR2I labelPos( aLabel->GetPosition() );
 
 for( const SEG& seg : segs )
 {
 if( seg.Contains( labelPos ) )
 return &seg;
 }
 
 return nullptr;
}
 
 
// TODO could be used to place junctions, instead of IsJunctionNeeded()
// (see SCH_EDIT_FRAME::importFile())
bool SCH_EAGLE_PLUGIN::checkConnections( const SCH_SYMBOL* aSymbol, const LIB_PIN* aPin ) const
{
 wxCHECK( aSymbol && aPin, false );
 
 VECTOR2I pinPosition = aSymbol->GetPinPhysicalPosition( aPin );
 auto pointIt = m_connPoints.find( pinPosition );
 
 if( pointIt == m_connPoints.end() )
 return false;
 
 const auto& items = pointIt->second;
 
 wxCHECK( items.find( aPin ) != items.end(), false );
 
 return items.size() > 1;
}
 
 
void SCH_EAGLE_PLUGIN::addImplicitConnections( SCH_SYMBOL* aSymbol, SCH_SCREEN* aScreen,
 bool aUpdateSet )
{
 wxCHECK( aSymbol->GetLibSymbolRef(), /*void*/ );
 
 // Normally power parts also have power input pins,
 // but they already force net names on the attached wires
 if( aSymbol->GetLibSymbolRef()->IsPower() )
 return;
 
 int unit = aSymbol->GetUnit();
 const wxString reference = aSymbol->GetField( REFERENCE_FIELD )->GetText();
 std::vector<LIB_PIN*> pins;
 aSymbol->GetLibSymbolRef()->GetPins( pins );
 std::set<int> missingUnits;
 
 // Search all units for pins creating implicit connections
 for( const LIB_PIN* pin : pins )
 {
 if( pin->GetType() == ELECTRICAL_PINTYPE::PT_POWER_IN )
 {
 bool pinInUnit = !unit || pin->GetUnit() == unit; // pin belongs to the tested unit
 
 // Create a global net label only if there are no other wires/pins attached
 if( pinInUnit )
 {
 if( !checkConnections( aSymbol, pin ) )
 {
 // Create a net label to force the net name on the pin
 SCH_GLOBALLABEL* netLabel = new SCH_GLOBALLABEL;
 netLabel->SetPosition( aSymbol->GetPinPhysicalPosition( pin ) );
 netLabel->SetText( extractNetName( pin->GetName() ) );
 netLabel->SetTextSize( VECTOR2I( schIUScale.MilsToIU( 40 ),
 schIUScale.MilsToIU( 40 ) ) );
 
 switch( pin->GetOrientation() )
 {
 case PIN_LEFT: netLabel->SetTextSpinStyle( TEXT_SPIN_STYLE::RIGHT ); break;
 case PIN_RIGHT: netLabel->SetTextSpinStyle( TEXT_SPIN_STYLE::LEFT ); break;
 case PIN_UP: netLabel->SetTextSpinStyle( TEXT_SPIN_STYLE::UP ); break;
 case PIN_DOWN: netLabel->SetTextSpinStyle( TEXT_SPIN_STYLE::BOTTOM ); break;
 }
 
 aScreen->Append( netLabel );
 }
 }
 else if( aUpdateSet )
 {
 // Found a pin creating implicit connection information in another unit.
 // Such units will be instantiated if they do not appear in another sheet and
 // processed later.
 wxASSERT( pin->GetUnit() );
 missingUnits.insert( pin->GetUnit() );
 }
 }
 }
 
 if( aUpdateSet && aSymbol->GetLibSymbolRef()->GetUnitCount() > 1 )
 {
 auto cmpIt = m_missingCmps.find( reference );
 
 // The first unit found has always already been processed.
 if( cmpIt == m_missingCmps.end() )
 {
 EAGLE_MISSING_CMP& entry = m_missingCmps[reference];
 entry.cmp = aSymbol;
 entry.units.emplace( unit, false );
 }
 else
 {
 // Set the flag indicating this unit has been processed.
 cmpIt->second.units[unit] = false;
 }
 
 if( !missingUnits.empty() ) // Save the units that need later processing
 {
 EAGLE_MISSING_CMP& entry = m_missingCmps[reference];
 entry.cmp = aSymbol;
 
 // Add units that haven't already been processed.
 for( int i : missingUnits )
 {
 if( entry.units.find( i ) != entry.units.end() )
 entry.units.emplace( i, true );
 }
 }
 }
}
 
 
wxString SCH_EAGLE_PLUGIN::translateEagleBusName( const wxString& aEagleName ) const
{
 if( NET_SETTINGS::ParseBusVector( aEagleName, nullptr, nullptr ) )
 return aEagleName;
 
 wxString ret = wxT( "{" );
 
 wxStringTokenizer tokenizer( aEagleName, wxT( "," ) );
 
 while( tokenizer.HasMoreTokens() )
 {
 wxString member = tokenizer.GetNextToken();
 
 // In Eagle, overbar text is automatically stopped at the end of the net name, even when
 // that net name is part of a bus definition. In KiCad, we don't (currently) do that, so
 // if there is an odd number of overbar markers in this net name, we need to append one
 // to close it out before appending the space.
 
 if( member.Freq( '!' ) % 2 > 0 )
 member << wxT( "!" );
 
 ret << member << wxS( " " );
 }
 
 ret.Trim( true );
 ret << wxT( "}" );
 
 return ret;
}