sch_symbol.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */
 
#include <sch_collectors.h>
#include <sch_commit.h>
#include <sch_edit_frame.h>
#include <widgets/msgpanel.h>
#include <bitmaps.h>
#include <core/mirror.h>
#include <sch_shape.h>
#include <pgm_base.h>
#include <sim/sim_model.h>
#include <sim/spice_generator.h>
#include <sim/sim_lib_mgr.h>
#include <trace_helpers.h>
#include <trigo.h>
#include <refdes_utils.h>
#include <wx/log.h>
#include <settings/settings_manager.h>
#include <sch_plotter.h>
#include <string_utils.h>
#include <geometry/geometry_utils.h>
#include <sch_rule_area.h>
 
#include <utility>
#include <validators.h>
 
 
std::unordered_map<TRANSFORM, int> SCH_SYMBOL::s_transformToOrientationCache;
 

std::string toUTFTildaText( const wxString& txt )
{
    std::string ret = TO_UTF8( txt );
 
    for( char& c : ret )
    {
        if( (unsigned char) c <= ' ' )
            c = '~';
    }
 
    return ret;
}
 
 
SCH_SYMBOL::SCH_SYMBOL() :
        SYMBOL( nullptr, SCH_SYMBOL_T )
{
    Init( VECTOR2I( 0, 0 ) );
}
 
 
SCH_SYMBOL::SCH_SYMBOL( const LIB_SYMBOL& aSymbol, const LIB_ID& aLibId,
                        const SCH_SHEET_PATH* aSheet, int aUnit, int aBodyStyle,
                        const VECTOR2I& aPosition, EDA_ITEM* aParent ) :
        SYMBOL( aParent, SCH_SYMBOL_T )
{
    Init( aPosition );
 
    m_unit      = aUnit;
    m_bodyStyle = aBodyStyle;
    m_lib_id    = aLibId;
 
    std::unique_ptr< LIB_SYMBOL > part;
 
    part = aSymbol.Flatten();
    part->SetParent();
    SetLibSymbol( part.release() );
 
    // Copy fields from the library symbol
    UpdateFields( aSheet,
                  true,   /* update style */
                  false,  /* update ref */
                  false,  /* update other fields */
                  true,   /* reset ref */
                  true    /* reset other fields */ );
 
    m_prefix = UTIL::GetRefDesPrefix( m_part->GetReferenceField().GetText() );
 
    if( aSheet )
        SetRef( aSheet, UTIL::GetRefDesUnannotated( m_prefix ) );
 
    // Inherit the include in bill of materials and board netlist settings from flattened
    // library symbol.
    m_excludedFromSim = m_part->GetExcludedFromSim();
    m_excludedFromBOM = m_part->GetExcludedFromBOM();
    m_excludedFromBoard = m_part->GetExcludedFromBoard();
}
 
 
SCH_SYMBOL::SCH_SYMBOL( const LIB_SYMBOL& aSymbol, const SCH_SHEET_PATH* aSheet,
                        const PICKED_SYMBOL& aSel, const VECTOR2I& aPosition, EDA_ITEM* aParent ) :
        SCH_SYMBOL( aSymbol, aSel.LibId, aSheet, aSel.Unit, aSel.Convert, aPosition, aParent )
{
    // Set any fields that were modified as part of the symbol selection
    for( const auto& [fieldId, fieldValue] : aSel.Fields )
    {
        if( fieldId == FIELD_T::REFERENCE )
            SetRef( aSheet, fieldValue );
        else if( SCH_FIELD* field = GetField( fieldId ) )
            field->SetText( fieldValue );
    }
}
 
 
SCH_SYMBOL::SCH_SYMBOL( const SCH_SYMBOL& aSymbol ) :
        SYMBOL( aSymbol )
{
    m_parent      = aSymbol.m_parent;
    m_pos         = aSymbol.m_pos;
    m_unit        = aSymbol.m_unit;
    m_bodyStyle   = aSymbol.m_bodyStyle;
    m_lib_id      = aSymbol.m_lib_id;
    m_isInNetlist = aSymbol.m_isInNetlist;
    m_DNP         = aSymbol.m_DNP;
 
    const_cast<KIID&>( m_Uuid ) = aSymbol.m_Uuid;
 
    m_transform = aSymbol.m_transform;
    m_prefix = aSymbol.m_prefix;
    m_instanceReferences = aSymbol.m_instanceReferences;
    m_fields = aSymbol.m_fields;
 
    // Re-parent the fields, which before this had aSymbol as parent
    for( SCH_FIELD& field : m_fields )
        field.SetParent( this );
 
    m_pins.clear();
 
    // Copy (and re-parent) the pins
    for( const std::unique_ptr<SCH_PIN>& pin : aSymbol.m_pins )
    {
        m_pins.emplace_back( std::make_unique<SCH_PIN>( *pin ) );
        m_pins.back()->SetParent( this );
    }
 
    if( aSymbol.m_part )
        SetLibSymbol( new LIB_SYMBOL( *aSymbol.m_part ) );
 
    m_fieldsAutoplaced = aSymbol.m_fieldsAutoplaced;
    m_schLibSymbolName = aSymbol.m_schLibSymbolName;
}
 
 
SCH_SYMBOL::~SCH_SYMBOL()
{
}
 
 
void SCH_SYMBOL::Init( const VECTOR2I& pos )
{
    m_layer     = LAYER_DEVICE;
    m_pos       = pos;
    m_unit      = 1;  // In multi unit chip - which unit to draw.
    m_bodyStyle = BODY_STYLE::BASE;  // De Morgan Handling
 
    // The rotation/mirror transformation matrix. pos normal
    m_transform = TRANSFORM();
 
    auto addField =
            [&]( FIELD_T id, SCH_LAYER_ID layer )
            {
                m_fields.emplace_back( this, id, GetCanonicalFieldName( id ) );
                m_fields.back().SetTextPos( pos );
                m_fields.back().SetLayer( layer );
            };
 
    // construct only the mandatory fields
    addField( FIELD_T::REFERENCE,   LAYER_REFERENCEPART );
    addField( FIELD_T::VALUE,       LAYER_VALUEPART     );
    addField( FIELD_T::FOOTPRINT,   LAYER_FIELDS        );
    addField( FIELD_T::DATASHEET,   LAYER_FIELDS        );
    addField( FIELD_T::DESCRIPTION, LAYER_FIELDS        );
 
    m_prefix = wxString( wxT( "U" ) );
    m_isInNetlist = true;
}
 
 
EDA_ITEM* SCH_SYMBOL::Clone() const
{
    return new SCH_SYMBOL( *this );
}
 
 
bool SCH_SYMBOL::IsMissingLibSymbol() const
{
    return m_part == nullptr;
}
 
 
bool SCH_SYMBOL::IsMovableFromAnchorPoint() const
{
    // If a symbol's anchor is not grid-aligned to its pins then moving from the anchor is
    // going to end up moving the symbol's pins off-grid.
 
    // The minimal grid size allowed to place a pin is 25 mils
    const int min_grid_size = schIUScale.MilsToIU( 25 );
 
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( ( ( pin->GetPosition().x - m_pos.x ) % min_grid_size ) != 0 )
            return false;
 
        if( ( ( pin->GetPosition().y - m_pos.y ) % min_grid_size ) != 0 )
            return false;
    }
 
    return true;
}
 
 
void SCH_SYMBOL::SetLibId( const LIB_ID& aLibId )
{
    m_lib_id = aLibId;
}
 
 
wxString SCH_SYMBOL::GetSchSymbolLibraryName() const
{
    if( !m_schLibSymbolName.IsEmpty() )
        return m_schLibSymbolName;
    else
        return m_lib_id.Format();
}
 
 
void SCH_SYMBOL::SetLibSymbol( LIB_SYMBOL* aLibSymbol )
{
    wxCHECK2( !aLibSymbol || aLibSymbol->IsRoot(), aLibSymbol = nullptr );
 
    m_part.reset( aLibSymbol );
 
    // We've just reset the library symbol, so the lib_pins, which were just
    // pointers to the old symbol, need to be cleared.
    for( auto& pin : m_pins )
        pin->SetLibPin( nullptr );
 
    UpdatePins();
}
 
 
wxString SCH_SYMBOL::GetDescription() const
{
    if( m_part )
        return m_part->GetDescription();
 
    return wxEmptyString;
}
 
 
wxString SCH_SYMBOL::GetKeyWords() const
{
    if( m_part )
        return m_part->GetKeyWords();
 
    return wxEmptyString;
}
 
 
wxString SCH_SYMBOL::GetDatasheet() const
{
    if( m_part )
        return m_part->GetDatasheetField().GetText();
 
    return wxEmptyString;
}
 
 
void SCH_SYMBOL::UpdatePins()
{
    std::map<wxString, wxString>            altPinMap;
    std::map<wxString, SCH_PIN::ALT>        altPinDefs;
    std::map<wxString, std::set<SCH_PIN*>>  pinUuidMap;
    std::set<SCH_PIN*>                      unassignedSchPins;
    std::set<SCH_PIN*>                      unassignedLibPins;
 
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        pinUuidMap[ pin->GetNumber() ].insert( pin.get() );
 
        unassignedSchPins.insert( pin.get() );
 
        if( !pin->GetAlt().IsEmpty() )
        {
            altPinMap[ pin->GetNumber() ] = pin->GetAlt();
            auto altDefIt = pin->GetAlternates().find( pin->GetAlt() );
 
            if( altDefIt != pin->GetAlternates().end() )
                altPinDefs[ pin->GetNumber() ] = altDefIt->second;
        }
 
        pin->SetLibPin( nullptr );
    }
 
    m_pinMap.clear();
 
    if( !m_part )
        return;
 
    for( SCH_PIN* libPin : m_part->GetPins() )
    {
        // NW: Don't filter by unit: this data-structure is used for all instances,
        // some of which might have different units.
        if( libPin->GetBodyStyle() && m_bodyStyle && m_bodyStyle != libPin->GetBodyStyle() )
            continue;
 
        SCH_PIN* pin = nullptr;
 
        auto ii = pinUuidMap.find( libPin->GetNumber() );
 
        if( ii == pinUuidMap.end() || ii->second.empty() )
        {
            unassignedLibPins.insert( libPin );
            continue;
        }
 
        auto it = ii->second.begin();
        pin = *it;
        ii->second.erase( it );
        pin->GetAlternates() = libPin->GetAlternates();
        pin->SetLibPin( libPin );
        pin->SetPosition( libPin->GetPosition() );
        pin->SetUnit( libPin->GetUnit() );
        pin->SetBodyStyle( libPin->GetBodyStyle() );
 
        unassignedSchPins.erase( pin );
 
        auto iii = altPinMap.find( libPin->GetNumber() );
 
        if( iii != altPinMap.end() )
        {
            wxString altName = iii->second;
 
            if( pin->GetAlternates().find( altName ) == pin->GetAlternates().end() )
            {
                auto defIt = altPinDefs.find( libPin->GetNumber() );
 
                if( defIt != altPinDefs.end() )
                {
                    for( const auto& [ name, alt ] : pin->GetAlternates() )
                    {
                        if( alt.m_Shape == defIt->second.m_Shape && alt.m_Type == defIt->second.m_Type )
                        {
                            altName = name;
                            break;
                        }
                    }
                }
            }
 
            pin->SetAlt( altName );
        }
 
        m_pinMap[ libPin ] = pin;
    }
 
    // Add any pins that were not found in the symbol
    for( SCH_PIN* libPin : unassignedLibPins )
    {
        SCH_PIN* pin = nullptr;
 
        // First try to re-use an existing pin
        if( !unassignedSchPins.empty() )
        {
            auto it = unassignedSchPins.begin();
            pin = *it;
            unassignedSchPins.erase( it );
        }
        else
        {
            // This is a pin that was not found in the symbol, so create a new one.
            pin = m_pins.emplace_back( std::make_unique<SCH_PIN>( SCH_PIN( this, libPin ) ) ).get();
        }
 
        m_pinMap[ libPin ] = pin;
        pin->GetAlternates() = libPin->GetAlternates();
        pin->SetLibPin( libPin );
        pin->SetPosition( libPin->GetPosition() );
        pin->SetUnit( libPin->GetUnit() );
        pin->SetBodyStyle( libPin->GetBodyStyle() );
        pin->SetNumber( libPin->GetNumber() );
 
        auto iii = altPinMap.find( libPin->GetNumber() );
 
        if( iii != altPinMap.end() )
        {
            wxString altName = iii->second;
 
            if( pin->GetAlternates().find( altName ) == pin->GetAlternates().end() )
            {
                auto defIt = altPinDefs.find( libPin->GetNumber() );
 
                if( defIt != altPinDefs.end() )
                {
                    for( const auto& [ name, alt ] : pin->GetAlternates() )
                    {
                        if( alt.m_Shape == defIt->second.m_Shape && alt.m_Type == defIt->second.m_Type )
                        {
                            altName = name;
                            break;
                        }
                    }
                }
            }
 
            pin->SetAlt( altName );
        }
    }
 
    // If we have any pins left in the symbol that were not found in the library, remove them.
    for( auto it1 = m_pins.begin(); it1 != m_pins.end() && !unassignedSchPins.empty(); )
    {
        auto it2 = unassignedSchPins.find( it1->get() );
 
        if( it2 != unassignedSchPins.end() )
        {
            it1 = m_pins.erase( it1 );
            unassignedSchPins.erase( it2 );
        }
        else
        {
            ++it1;
        }
    }
 
    // If the symbol is selected, then its pins are selected.
    if( IsSelected() )
    {
        for( std::unique_ptr<SCH_PIN>& pin : m_pins )
            pin->SetSelected();
    }
 
}
 
 
void SCH_SYMBOL::SetBodyStyle( int aBodyStyle )
{
    if( aBodyStyle != m_bodyStyle )
    {
        m_bodyStyle = aBodyStyle;
 
        // The body style may have a different pin layout so the update the pin map.
        UpdatePins();
    }
}
 
 
int SCH_SYMBOL::GetUnitCount() const
{
    if( m_part )
        return m_part->GetUnitCount();
 
    return 0;
}
 
 
int SCH_SYMBOL::GetBodyStyleCount() const
{
    if( m_part )
        return m_part->GetBodyStyleCount();
 
    return 0;
}
 
 
bool SCH_SYMBOL::HasDeMorganBodyStyles() const
{
    if( m_part )
        return m_part->HasDeMorganBodyStyles();
 
    return false;
}
 
 
wxString SCH_SYMBOL::GetUnitDisplayName( int aUnit, bool aLabel ) const
{
    if( m_part )
        return m_part->GetUnitDisplayName( aUnit, aLabel );
    else if( aLabel )
        return wxString::Format( _( "Unit %s" ), SubReference( aUnit ) );
    else
        return SubReference( aUnit );
}
 
 
wxString SCH_SYMBOL::GetBodyStyleDescription( int aBodyStyle, bool aLabel ) const
{
    if( m_part )
        return m_part->GetBodyStyleDescription( aBodyStyle, aLabel );
    else
        return wxT( "?" );
}
 
 
bool SCH_SYMBOL::GetInstance( SCH_SYMBOL_INSTANCE& aInstance, const KIID_PATH& aSheetPath,
                              bool aTestFromEnd ) const
{
    for( const SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( !aTestFromEnd )
        {
            if( instance.m_Path == aSheetPath )
            {
                aInstance = instance;
                return true;
            }
        }
        else if( instance.m_Path.EndsWith( aSheetPath ) )
        {
            aInstance = instance;
            return true;
        }
    }
 
    return false;
}
 
 
void SCH_SYMBOL::RemoveInstance( const SCH_SHEET_PATH& aInstancePath )
{
    RemoveInstance( aInstancePath.Path() );
}
 
 
void SCH_SYMBOL::RemoveInstance( const KIID_PATH& aInstancePath )
{
    // Search for an existing path and remove it if found
    // (search from back to avoid invalidating iterator on remove)
    for( int ii = m_instanceReferences.size() - 1; ii >= 0; --ii )
    {
        if( m_instanceReferences[ii].m_Path == aInstancePath )
        {
            wxLogTrace( traceSchSheetPaths, wxS( "Removing symbol instance:\n"
                                                 "    sheet path %s\n"
                                                 "    reference %s, unit %d from symbol %s." ),
                        aInstancePath.AsString(),
                        m_instanceReferences[ii].m_Reference,
                        m_instanceReferences[ii].m_Unit,
                        m_Uuid.AsString() );
 
            m_instanceReferences.erase( m_instanceReferences.begin() + ii );
        }
    }
}
 
 
void SCH_SYMBOL::AddHierarchicalReference( const KIID_PATH& aPath, const wxString& aRef, int aUnit )
{
    SCH_SYMBOL_INSTANCE instance;
    instance.m_Path = aPath;
    instance.m_Reference = aRef;
    instance.m_Unit = aUnit;
 
    AddHierarchicalReference( instance );
}
 
 
void SCH_SYMBOL::AddHierarchicalReference( const SCH_SYMBOL_INSTANCE& aInstance )
{
    RemoveInstance( aInstance.m_Path );
 
    SCH_SYMBOL_INSTANCE instance = aInstance;
 
    wxLogTrace( traceSchSheetPaths, wxS( "Adding symbol '%s' instance:\n"
                                         "    sheet path '%s'\n"
                                         "    reference '%s'\n"
                                         "    unit %d\n" ),
                m_Uuid.AsString(),
                instance.m_Path.AsString(),
                instance.m_Reference,
                instance.m_Unit );
 
    m_instanceReferences.push_back( instance );
 
    // This should set the default instance to the first saved instance data for each symbol
    // when importing sheets.
    if( m_instanceReferences.size() == 1 )
    {
        GetField( FIELD_T::REFERENCE )->SetText( instance.m_Reference );
        m_unit = instance.m_Unit;
    }
}
 
 
const wxString SCH_SYMBOL::GetRef( const SCH_SHEET_PATH* sheet, bool aIncludeUnit ) const
{
    KIID_PATH path = sheet->Path();
    wxString  ref;
    wxString  subRef;
 
    for( const SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( instance.m_Path == path )
        {
            ref = instance.m_Reference;
            subRef = SubReference( instance.m_Unit );
            break;
        }
    }
 
    // If it was not found in m_Paths array, then see if it is in m_Field[REFERENCE] -- if so,
    // use this as a default for this path.  This will happen if we load a version 1 schematic
    // file.  It will also mean that multiple instances of the same sheet by default all have
    // the same symbol references, but perhaps this is best.
    if( ref.IsEmpty() && !GetField( FIELD_T::REFERENCE )->GetText().IsEmpty() )
        ref = GetField( FIELD_T::REFERENCE )->GetText();
 
    if( ref.IsEmpty() )
        ref = UTIL::GetRefDesUnannotated( m_prefix );
 
    if( aIncludeUnit && GetUnitCount() > 1 )
        ref += subRef;
 
    return ref;
}
 
 
void SCH_SYMBOL::SetRefProp( const wxString& aRef )
{
    FIELD_VALIDATOR validator( FIELD_T::REFERENCE );
 
    if( validator.DoValidate( aRef, nullptr ) )
        SetRef( &Schematic()->CurrentSheet(), aRef );
}
 
 
void SCH_SYMBOL::SetRef( const SCH_SHEET_PATH* sheet, const wxString& ref )
{
    KIID_PATH path = sheet->Path();
    bool      found = false;
 
    // check to see if it is already there before inserting it
    for( SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( instance.m_Path == path )
        {
            found = true;
            instance.m_Reference = ref;
            break;
        }
    }
 
    if( !found )
        AddHierarchicalReference( path, ref, m_unit );
 
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
        pin->ClearDefaultNetName( sheet );
 
    if( Schematic() && *sheet == Schematic()->CurrentSheet() )
        GetField( FIELD_T::REFERENCE )->SetText( ref );
 
    // Reinit the m_prefix member if needed
    m_prefix = UTIL::GetRefDesPrefix( ref );
 
    if( m_prefix.IsEmpty() )
        m_prefix = wxT( "U" );
 
    // Power symbols have references starting with # and are not included in netlists
    m_isInNetlist = ! ref.StartsWith( wxT( "#" ) );
}
 
 
bool SCH_SYMBOL::IsAnnotated( const SCH_SHEET_PATH* aSheet ) const
{
    KIID_PATH path = aSheet->Path();
 
    for( const SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( instance.m_Path == path )
            return !instance.m_Reference.IsEmpty() && instance.m_Reference.Last() != '?';
    }
 
    return false;
}
 
 
void SCH_SYMBOL::UpdatePrefix()
{
    wxString refDesignator = GetField( FIELD_T::REFERENCE )->GetText();
 
    refDesignator.Replace( "~", " " );
 
    wxString prefix = refDesignator;
 
    while( prefix.Length() )
    {
        wxUniCharRef last = prefix.Last();
 
        if( ( last >= '0' && last <= '9' ) || last == '?' || last == '*' )
            prefix.RemoveLast();
        else
            break;
    }
 
    // Avoid a prefix containing trailing/leading spaces
    prefix.Trim( true );
    prefix.Trim( false );
 
    if( !prefix.IsEmpty() )
        SetPrefix( prefix );
}
 
 
wxString SCH_SYMBOL::SubReference( int aUnit, bool aAddSeparator ) const
{
    if( SCHEMATIC* schematic = Schematic() )
        return schematic->Settings().SubReference( aUnit, aAddSeparator );
 
    return LIB_SYMBOL::LetterSubReference( aUnit, 'A' );
}
 
 
int SCH_SYMBOL::GetUnitSelection( const SCH_SHEET_PATH* aSheet ) const
{
    KIID_PATH path = aSheet->Path();
 
    for( const SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( instance.m_Path == path )
            return instance.m_Unit;
    }
 
    // If it was not found in m_Paths array, then use m_unit.  This will happen if we load a
    // version 1 schematic file.
    return m_unit;
}
 
 
void SCH_SYMBOL::SetUnitSelection( const SCH_SHEET_PATH* aSheet, int aUnitSelection )
{
    KIID_PATH path = aSheet->Path();
 
    // check to see if it is already there before inserting it
    for( SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        if( instance.m_Path == path )
        {
            instance.m_Unit = aUnitSelection;
            return;
        }
    }
 
    // didn't find it; better add it
    AddHierarchicalReference( path, UTIL::GetRefDesUnannotated( m_prefix ), aUnitSelection );
}
 
 
void SCH_SYMBOL::SetDNP(bool aEnable, const SCH_SHEET_PATH* aInstance, const wxString& aVariantName )
{
    if( !aInstance || aVariantName.IsEmpty() )
    {
        m_DNP = aEnable;
        return;
    }
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), /* void */,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        instance.m_DNP = aEnable;
    }
    else
    {
        if( instance.m_Variants.contains( aVariantName ) )
        {
            instance.m_Variants[aVariantName].m_DNP = aEnable;
        }
        else
        {
            SCH_SYMBOL_VARIANT variant( aVariantName );
 
            variant.InitializeAttributes( *this );
            variant.m_DNP = aEnable;
            AddVariant( *aInstance, variant );
        }
    }
}
 
 
bool SCH_SYMBOL::GetDNP( const SCH_SHEET_PATH* aInstance, const wxString& aVariantName ) const
{
    if( !aInstance || aVariantName.IsEmpty() )
        return m_DNP;
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), m_DNP,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        return instance.m_DNP;
    }
    else
    {
        wxCHECK_MSG( instance.m_Variants.contains( aVariantName ), false,
                     wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s' for variant '%s'." ),
                                       aInstance->PathHumanReadable(), aVariantName ) );
 
        return instance.m_Variants[aVariantName].m_DNP;
    }
}
 
 
void SCH_SYMBOL::SetDNP( bool aEnable, const SCH_SHEET_PATH& aInstance, const std::vector<wxString>& aVariantNames )
{
    for( const wxString& variantName : aVariantNames )
        SetDNP( aEnable, &aInstance, variantName );
}
 
 
void SCH_SYMBOL::SetExcludedFromBOM( bool aEnable, const SCH_SHEET_PATH* aInstance,
                                     const wxString& aVariantName )
{
    if( !aInstance || aVariantName.IsEmpty() )
    {
        m_excludedFromBOM = aEnable;
        return;
    }
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), /* void */,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        instance.m_ExcludedFromBOM = aEnable;
    }
    else
    {
        if( instance.m_Variants.contains( aVariantName ) )
        {
            instance.m_Variants[aVariantName].m_ExcludedFromBOM = aEnable;
        }
        else
        {
            SCH_SYMBOL_VARIANT variant( aVariantName );
 
            variant.InitializeAttributes( *this );
            variant.m_ExcludedFromBOM = aEnable;
            AddVariant( *aInstance, variant );
        }
    }
}
 
 
bool SCH_SYMBOL::GetExcludedFromBOM( const SCH_SHEET_PATH* aInstance, const wxString& aVariantName ) const
{
    if( !aInstance || aVariantName.IsEmpty() )
        return m_excludedFromBOM;
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), m_excludedFromBOM,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        return instance.m_ExcludedFromBOM;
    }
    else
    {
        wxCHECK_MSG( instance.m_Variants.contains( aVariantName ), false,
                     wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s' variant '%s'." ),
                                       aInstance->PathHumanReadable(), aVariantName ) );
 
        return instance.m_Variants[aVariantName].m_ExcludedFromBOM;
    }
}
 
 
void SCH_SYMBOL::SetExcludedFromBOM( bool aEnable, const SCH_SHEET_PATH& aInstance,
                                     const std::vector<wxString>& aVariantNames )
{
    for( const wxString& variantName : aVariantNames )
        SetExcludedFromBOM( aEnable, &aInstance, variantName );
}
 
 
void SCH_SYMBOL::SetExcludedFromSim( bool aEnable, const SCH_SHEET_PATH* aInstance, const wxString& aVariantName )
{
    if( !aInstance || aVariantName.IsEmpty() )
    {
        m_excludedFromSim = aEnable;
        return;
    }
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), /* void */,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        instance.m_ExcludedFromSim = aEnable;
    }
    else
    {
        if( instance.m_Variants.contains( aVariantName ) )
        {
            instance.m_Variants[aVariantName].m_ExcludedFromSim = aEnable;
        }
        else
        {
            SCH_SYMBOL_VARIANT variant( aVariantName );
 
            variant.InitializeAttributes( *this );
            variant.m_ExcludedFromSim = aEnable;
            AddVariant( *aInstance, variant );
        }
    }
}
 
 
bool SCH_SYMBOL::GetExcludedFromSim( const SCH_SHEET_PATH* aInstance, const wxString& aVariantName ) const
{
    if( !aInstance || aVariantName.IsEmpty() )
        return m_excludedFromSim;
 
    SCH_SYMBOL_INSTANCE instance;
 
    wxCHECK_MSG( GetInstance( instance, aInstance->Path() ), m_excludedFromSim,
                 wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s'." ),
                                   aInstance->PathHumanReadable() ) );
 
    if( aVariantName.IsEmpty() )
    {
        return instance.m_ExcludedFromSim;
    }
    else
    {
        wxCHECK_MSG( instance.m_Variants.contains( aVariantName ), false,
                     wxString::Format( wxS( "Cannot get DNP attribute for invalid sheet path '%s' variant '%s'." ),
                                       aInstance->PathHumanReadable(), aVariantName ) );
 
        return instance.m_Variants[aVariantName].m_ExcludedFromSim;
    }
}
 
 
void SCH_SYMBOL::SetExcludedFromSim( bool aEnable, const SCH_SHEET_PATH& aInstance,
                                     const std::vector<wxString>& aVariantNames )
{
    for( const wxString& variantName : aVariantNames )
        SetExcludedFromSim( aEnable, &aInstance, variantName );
}
 
 
void SCH_SYMBOL::SetUnitSelection( int aUnitSelection )
{
    for( SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
        instance.m_Unit = aUnitSelection;
}
 
 
const wxString SCH_SYMBOL::GetValue( bool aResolve, const SCH_SHEET_PATH* aPath,
                                     bool aAllowExtraText ) const
{
    if( aResolve )
        return GetField( FIELD_T::VALUE )->GetShownText( aPath, aAllowExtraText );
 
    return GetField( FIELD_T::VALUE )->GetText();
}
 
 
void SCH_SYMBOL::SetValueFieldText( const wxString& aValue )
{
    GetField( FIELD_T::VALUE )->SetText( aValue );
}
 
 
const wxString SCH_SYMBOL::GetFootprintFieldText( bool aResolve, const SCH_SHEET_PATH* aPath,
                                                  bool aAllowExtraText ) const
{
    if( aResolve )
        return GetField( FIELD_T::FOOTPRINT )->GetShownText( aPath, aAllowExtraText );
 
    return GetField( FIELD_T::FOOTPRINT )->GetText();
}
 
 
void SCH_SYMBOL::SetFootprintFieldText( const wxString& aFootprint )
{
    GetField( FIELD_T::FOOTPRINT )->SetText( aFootprint );
}
 
 
SCH_FIELD* SCH_SYMBOL::GetField( FIELD_T aFieldType )
{
    if( SCH_FIELD* field = FindField( m_fields, aFieldType ) )
        return field;
 
    m_fields.emplace_back( this, aFieldType );
    return &m_fields.back();
}
 
 
const SCH_FIELD* SCH_SYMBOL::GetField( FIELD_T aFieldType ) const
{
    return FindField( m_fields, aFieldType );
}
 
 
SCH_FIELD* SCH_SYMBOL::GetField( const wxString& aFieldName )
{
    return FindField( m_fields, aFieldName );
}
 
 
const SCH_FIELD* SCH_SYMBOL::GetField( const wxString& aFieldName ) const
{
    return FindField( m_fields, aFieldName );
}
 
 
void SCH_SYMBOL::GetFields( std::vector<SCH_FIELD*>& aVector, bool aVisibleOnly ) const
{
    for( const SCH_FIELD& field : m_fields )
    {
        if( aVisibleOnly )
        {
            if( !field.IsVisible() || field.GetText().IsEmpty() )
                continue;
        }
 
        aVector.push_back( const_cast<SCH_FIELD*>( &field ) );
    }
 
    std::sort( aVector.begin(), aVector.end(),
               []( SCH_FIELD* lhs, SCH_FIELD* rhs )
               {
                   return lhs->GetOrdinal() < rhs->GetOrdinal();
               } );
}
 
 
int SCH_SYMBOL::GetNextFieldOrdinal() const
{
    return NextFieldOrdinal( m_fields );
}
 
 
SCH_FIELD* SCH_SYMBOL::AddField( const SCH_FIELD& aField )
{
    m_fields.push_back( aField );
    return &m_fields.back();
}
 
 
void SCH_SYMBOL::RemoveField( const wxString& aFieldName )
{
    for( unsigned ii = 0; ii < m_fields.size(); ++ii )
    {
        if( m_fields[ii].IsMandatory() )
            continue;
 
        if( aFieldName == m_fields[ii].GetName( false ) )
        {
            m_fields.erase( m_fields.begin() + ii );
            return;
        }
    }
}
 
 
SCH_FIELD* SCH_SYMBOL::FindFieldCaseInsensitive( const wxString& aFieldName )
{
    for( SCH_FIELD& field : m_fields )
    {
        if( field.GetName().IsSameAs( aFieldName, false ) )
            return &field;
    }
 
    return nullptr;
}
 
 
void SCH_SYMBOL::UpdateFields( const SCH_SHEET_PATH* aPath, bool aUpdateStyle, bool aUpdateRef,
                               bool aUpdateOtherFields, bool aResetRef, bool aResetOtherFields )
{
    if( m_part )
    {
        std::vector<SCH_FIELD*> fields;
        m_part->GetFields( fields );
 
        for( const SCH_FIELD* libField : fields )
        {
            SCH_FIELD* schField;
            FIELD_T    fieldType = FIELD_T::USER;
 
            if( libField->IsMandatory() )
            {
                fieldType = libField->GetId();
                schField = GetField( fieldType );
            }
            else
            {
                schField = GetField( libField->GetCanonicalName() );
 
                if( !schField )
                {
                    schField = AddField( SCH_FIELD( this, FIELD_T::USER, libField->GetCanonicalName() ) );
                    schField->ImportValues( *libField );
                    schField->SetTextPos( m_pos + libField->GetTextPos() );
                }
            }
 
            schField->SetPrivate( libField->IsPrivate() );
 
            if( aUpdateStyle )
            {
                schField->ImportValues( *libField );
                schField->SetTextPos( m_pos + libField->GetTextPos() );
            }
 
            if( fieldType == FIELD_T::REFERENCE && aPath )
            {
                if( aResetRef )
                    SetRef( aPath, m_part->GetField( FIELD_T::REFERENCE )->GetText() );
                else if( aUpdateRef )
                    SetRef( aPath, libField->GetText() );
            }
            else if( fieldType == FIELD_T::VALUE )
            {
                SetValueFieldText( UnescapeString( libField->GetText() ) );
            }
            else if( fieldType == FIELD_T::DATASHEET )
            {
                if( aResetOtherFields )
                    schField->SetText( GetDatasheet() ); // alias-specific value
                else if( aUpdateOtherFields )
                    schField->SetText( libField->GetText() );
            }
            else
            {
                if( aResetOtherFields || aUpdateOtherFields )
                    schField->SetText( libField->GetText() );
            }
        }
    }
}
 
 
void SCH_SYMBOL::SyncOtherUnits( const SCH_SHEET_PATH& aSourceSheet, SCH_COMMIT& aCommit,
                                 PROPERTY_BASE* aProperty )
{
    bool updateValue = true;
    bool updateExclFromBOM = true;
    bool updateExclFromBoard = true;
    bool updateDNP = true;
    bool updateOtherFields = true;
    bool updatePins = true;
 
    if( aProperty )
    {
        updateValue = aProperty->Name() == _HKI( "Value" );
        updateExclFromBoard = aProperty->Name() == _HKI( "Exclude From Board" );
        updateExclFromBOM = aProperty->Name() == _HKI( "Exclude From Bill of Materials" );
        updateDNP = aProperty->Name() == _HKI( "Do not Populate" );
        updateOtherFields = false;
        updatePins = false;
    }
 
    if( !updateValue
            && !updateExclFromBOM
            && !updateExclFromBoard
            && !updateDNP
            && !updateOtherFields
            && !updatePins )
    {
        return;
    }
 
    // Keep fields other than the reference, include/exclude flags, and alternate pin assignments
    // in sync in multi-unit parts.
    if( GetUnitCount() > 1 && IsAnnotated( &aSourceSheet ) )
    {
        wxString ref = GetRef( &aSourceSheet );
 
        for( SCH_SHEET_PATH& sheet : Schematic()->Hierarchy() )
        {
            SCH_SCREEN*              screen = sheet.LastScreen();
            std::vector<SCH_SYMBOL*> otherUnits;
 
            CollectOtherUnits( ref, m_unit, m_lib_id, sheet, &otherUnits );
 
            for( SCH_SYMBOL* otherUnit : otherUnits )
            {
                aCommit.Modify( otherUnit, screen );
 
                if( updateValue )
                    otherUnit->SetValueFieldText( GetField( FIELD_T::VALUE )->GetText() );
 
                if( updateOtherFields )
                {
                    for( SCH_FIELD& field : m_fields )
                    {
                        if( field.GetId() == FIELD_T::REFERENCE || field.GetId() == FIELD_T::VALUE )
                        {
                            // already handled
                            continue;
                        }
 
                        SCH_FIELD* otherField;
 
                        if( field.IsMandatory() )
                            otherField = otherUnit->GetField( field.GetId() );
                        else
                            otherField = otherUnit->GetField( field.GetName() );
 
                        if( otherField )
                        {
                            otherField->SetText( field.GetText() );
                        }
                        else
                        {
                            SCH_FIELD newField( field );
                            const_cast<KIID&>( newField.m_Uuid ) = KIID();
 
                            newField.Offset( -GetPosition() );
                            newField.Offset( otherUnit->GetPosition() );
 
                            newField.SetParent( otherUnit );
                            otherUnit->AddField( newField );
                        }
                    }
 
                    for( int ii = (int) otherUnit->GetFields().size() - 1; ii >= 0; ii-- )
                    {
                        SCH_FIELD& otherField = otherUnit->GetFields()[ii];
 
                        if( !otherField.IsMandatory() && !GetField( otherField.GetName() ) )
                            otherUnit->GetFields().erase( otherUnit->GetFields().begin() + ii );
                    }
                }
 
                if( updateExclFromBOM )
                    otherUnit->SetExcludedFromBOM( m_excludedFromBOM );
 
                if( updateExclFromBoard )
                    otherUnit->SetExcludedFromBoard( m_excludedFromBoard );
 
                if( updateDNP )
                    otherUnit->SetDNP( GetDNP( &aSourceSheet ), &sheet );
 
                if( updatePins )
                {
                    for( const std::unique_ptr<SCH_PIN>& model_pin : m_pins )
                    {
                        SCH_PIN* src_pin = otherUnit->GetPin( model_pin->GetNumber() );
 
                        if( src_pin )
                            src_pin->SetAlt( model_pin->GetAlt() );
                    }
                }
            }
        }
    }
}
 
 
void SCH_SYMBOL::RunOnChildren( const std::function<void( SCH_ITEM* )>& aFunction, RECURSE_MODE aMode )
{
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
        aFunction( pin.get() );
 
    for( SCH_FIELD& field : m_fields )
        aFunction( &field );
}
 
 
SCH_PIN* SCH_SYMBOL::GetPin( const wxString& aNumber ) const
{
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( pin->GetNumber() == aNumber )
            return pin.get();
    }
 
    return nullptr;
}
 
 
const SCH_PIN* SCH_SYMBOL::GetPin( const VECTOR2I& aPos ) const
{
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        int pin_unit      = pin->GetLibPin() ? pin->GetLibPin()->GetUnit()
                                             : GetUnit();
        int pin_bodyStyle = pin->GetLibPin() ? pin->GetLibPin()->GetBodyStyle()
                                             : GetBodyStyle();
 
        if( pin_unit > 0 && pin_unit != GetUnit() )
            continue;
 
        if( pin_bodyStyle > 0 && pin_bodyStyle != GetBodyStyle() )
            continue;
 
        if( pin->GetPosition() == aPos )
            return pin.get();
    }
 
    return nullptr;
}
 
 
std::vector<SCH_PIN*> SCH_SYMBOL::GetLibPins() const
{
    if( m_part )
        return m_part->GetGraphicalPins( m_unit, m_bodyStyle );
 
    return std::vector<SCH_PIN*>();
}
 
 
std::vector<SCH_PIN*> SCH_SYMBOL::GetAllLibPins() const
{
    if( m_part )
        return m_part->GetPins();
 
    return std::vector<SCH_PIN*>();
}
 
 
size_t SCH_SYMBOL::GetFullPinCount() const
{
    return m_part ? m_part->GetPinCount() : 0;
}
 
 
SCH_PIN* SCH_SYMBOL::GetPin( SCH_PIN* aLibPin ) const
{
    auto it = m_pinMap.find( aLibPin );
 
    if( it != m_pinMap.end() )
        return it->second;
 
    wxFAIL_MSG_AT( "Pin not found", __FILE__, __LINE__, __FUNCTION__ );
    return nullptr;
}
 
 
std::vector<SCH_PIN*> SCH_SYMBOL::GetPins( const SCH_SHEET_PATH* aSheet ) const
{
    std::vector<SCH_PIN*> pins;
    int                   unit = m_unit;
 
    if( !aSheet && Schematic() )
        aSheet = &Schematic()->CurrentSheet();
 
    if( aSheet )
        unit = GetUnitSelection( aSheet );
 
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( unit && pin->GetUnit() && pin->GetUnit() != unit )
            continue;
 
        pins.push_back( pin.get() );
    }
 
    return pins;
}
 
 
std::vector<SCH_PIN*> SCH_SYMBOL::GetPins() const
{
    return GetPins( nullptr );
}
 
 
void SCH_SYMBOL::swapData( SCH_ITEM* aItem )
{
    wxCHECK_RET( aItem != nullptr && aItem->Type() == SCH_SYMBOL_T,
                 wxT( "Cannot swap data with invalid symbol." ) );
 
    SCH_SYMBOL* symbol = static_cast<SCH_SYMBOL*>( aItem );
 
    std::swap( m_lib_id, symbol->m_lib_id );
 
    m_pins.swap( symbol->m_pins );      // std::vector's swap()
 
    for( std::unique_ptr<SCH_PIN>& pin : symbol->m_pins )
        pin->SetParent( symbol );
 
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
        pin->SetParent( this );
 
    LIB_SYMBOL* libSymbol = symbol->m_part.release();
    symbol->m_part = std::move( m_part );
    symbol->UpdatePins();
    m_part.reset( libSymbol );
    UpdatePins();
 
    std::swap( m_pos, symbol->m_pos );
    std::swap( m_unit, symbol->m_unit );
    std::swap( m_bodyStyle, symbol->m_bodyStyle );
 
    m_fields.swap( symbol->m_fields );    // std::vector's swap()
 
    for( SCH_FIELD& field : symbol->m_fields )
        field.SetParent( symbol );
 
    for( SCH_FIELD& field : m_fields )
        field.SetParent( this );
 
    TRANSFORM tmp = m_transform;
 
    m_transform = symbol->m_transform;
    symbol->m_transform = tmp;
 
    std::swap( m_excludedFromSim, symbol->m_excludedFromSim );
    std::swap( m_excludedFromBOM, symbol->m_excludedFromBOM );
    std::swap( m_DNP, symbol->m_DNP );
    std::swap( m_excludedFromBoard, symbol->m_excludedFromBoard );
 
    std::swap( m_instanceReferences, symbol->m_instanceReferences );
    std::swap( m_schLibSymbolName, symbol->m_schLibSymbolName );
}
 
 
void SCH_SYMBOL::GetContextualTextVars( wxArrayString* aVars ) const
{
    for( const SCH_FIELD& field : m_fields )
    {
        if( field.IsPrivate() )
            continue;
 
        if( field.IsMandatory() )
            aVars->push_back( field.GetCanonicalName().Upper() );
        else
            aVars->push_back( field.GetName() );
    }
 
    aVars->push_back( wxT( "OP" ) );
    aVars->push_back( wxT( "FOOTPRINT_LIBRARY" ) );
    aVars->push_back( wxT( "FOOTPRINT_NAME" ) );
    aVars->push_back( wxT( "UNIT" ) );
    aVars->push_back( wxT( "SHORT_REFERENCE" ) );
    aVars->push_back( wxT( "SYMBOL_LIBRARY" ) );
    aVars->push_back( wxT( "SYMBOL_NAME" ) );
    aVars->push_back( wxT( "SYMBOL_DESCRIPTION" ) );
    aVars->push_back( wxT( "SYMBOL_KEYWORDS" ) );
    aVars->push_back( wxT( "EXCLUDE_FROM_BOM" ) );
    aVars->push_back( wxT( "EXCLUDE_FROM_BOARD" ) );
    aVars->push_back( wxT( "EXCLUDE_FROM_SIM" ) );
    aVars->push_back( wxT( "DNP" ) );
    aVars->push_back( wxT( "SHORT_NET_NAME(<pin_number>)" ) );
    aVars->push_back( wxT( "NET_NAME(<pin_number>)" ) );
    aVars->push_back( wxT( "NET_CLASS(<pin_number>)" ) );
    aVars->push_back( wxT( "PIN_NAME(<pin_number>)" ) );
}
 
 
bool SCH_SYMBOL::ResolveTextVar( const SCH_SHEET_PATH* aPath, wxString* token, int aDepth ) const
{
    static wxRegEx operatingPoint( wxT( "^"
                                        "OP"
                                        "(:[^.]*)?"      // pin
                                        "(.([0-9])?"     // precisionStr
                                        "([a-zA-Z]*))?"  // rangeStr
                                        "$" ) );
 
    wxCHECK( aPath, false );
 
    SCHEMATIC* schematic = Schematic();
 
    if( !schematic )
        return false;
 
    if( operatingPoint.Matches( *token ) )
    {
        wxString pin( operatingPoint.GetMatch( *token, 1 ).Lower() );
        wxString precisionStr( operatingPoint.GetMatch( *token, 3 ) );
        wxString rangeStr( operatingPoint.GetMatch( *token, 4 ) );
 
        int      precision = precisionStr.IsEmpty() ? 3 : precisionStr[0] - '0';
        wxString range = rangeStr.IsEmpty() ? wxString( wxS( "~A" ) ) : rangeStr;
 
        SIM_LIB_MGR simLibMgr( &schematic->Project() );
 
        std::vector<EMBEDDED_FILES*> embeddedFilesStack;
        embeddedFilesStack.push_back( schematic->GetEmbeddedFiles() );
 
        if( m_part )
            embeddedFilesStack.push_back( m_part->GetEmbeddedFiles() );
 
        simLibMgr.SetFilesStack( std::move( embeddedFilesStack ) );
 
        NULL_REPORTER devnull;
        SIM_MODEL&    model = simLibMgr.CreateModel( aPath, const_cast<SCH_SYMBOL&>( *this ),
                                                     true, aDepth + 1, devnull ).model;
        SPICE_ITEM spiceItem;
        spiceItem.refName = GetRef( aPath );
 
        wxString spiceRef = model.SpiceGenerator().ItemName( spiceItem );
        spiceRef = spiceRef.Lower();
 
        if( pin.IsEmpty() )
        {
            *token = schematic->GetOperatingPoint( spiceRef, precision, range );
            return true;
        }
        else if( pin == wxS( ":power" ) )
        {
            if( rangeStr.IsEmpty() )
                range = wxS( "~W" );
 
            *token = schematic->GetOperatingPoint( spiceRef + wxS( ":power" ), precision, range );
            return true;
        }
        else
        {
            pin = pin.SubString( 1, -1 );   // Strip ':' from front
 
            for( const std::reference_wrapper<const SIM_MODEL_PIN>& modelPin : model.GetPins() )
            {
                SCH_PIN* symbolPin = GetPin( modelPin.get().symbolPinNumber );
 
                if( pin == symbolPin->GetName().Lower() || pin == symbolPin->GetNumber().Lower() )
                {
                    if( model.GetPins().size() == 2 )
                    {
                        *token = schematic->GetOperatingPoint( spiceRef, precision, range );
                    }
                    else
                    {
                        wxString signalName = spiceRef + wxS( ":" ) + modelPin.get().modelPinName;
                        *token = schematic->GetOperatingPoint( signalName, precision, range );
                    }
 
                    return true;
                }
            }
        }
 
        *token = wxS( "?" );
        return true;
    }
 
    if( token->Contains( ':' ) )
    {
        if( schematic->ResolveCrossReference( token, aDepth + 1 ) )
            return true;
    }
 
    for( const SCH_FIELD& field : m_fields )
    {
        wxString fieldName = field.IsMandatory() ? field.GetCanonicalName()
                                                 : field.GetName();
 
        wxString textToken = field.GetText();
        textToken.Replace( " ", wxEmptyString );
        wxString tokenString = "${" + fieldName + "}";
 
        // If the field data is just a reference to the field, don't resolve
        if( textToken.IsSameAs( tokenString, false ) )
            return true;
 
        if( token->IsSameAs( fieldName, false ) )
        {
            if( field.GetId() == FIELD_T::REFERENCE )
                *token = GetRef( aPath, true );
            else
                *token = field.GetShownText( aPath, false, aDepth + 1 );
 
            return true;
        }
    }
 
    // Consider missing simulation fields as empty, not un-resolved
    if( token->IsSameAs( wxT( "SIM.DEVICE" ) )
            || token->IsSameAs( wxT( "SIM.TYPE" ) )
            || token->IsSameAs( wxT( "SIM.PINS" ) )
            || token->IsSameAs( wxT( "SIM.PARAMS" ) )
            || token->IsSameAs( wxT( "SIM.LIBRARY" ) )
            || token->IsSameAs( wxT( "SIM.NAME" ) ) )
    {
        *token = wxEmptyString;
        return true;
    }
 
    for( const TEMPLATE_FIELDNAME& templateFieldname :
            schematic->Settings().m_TemplateFieldNames.GetTemplateFieldNames() )
    {
        if( token->IsSameAs( templateFieldname.m_Name )
            || token->IsSameAs( templateFieldname.m_Name.Upper() ) )
        {
            // If we didn't find it in the fields list then it isn't set on this symbol.
            // Just return an empty string.
            *token = wxEmptyString;
            return true;
        }
    }
 
    if( token->IsSameAs( wxT( "FOOTPRINT_LIBRARY" ) ) )
    {
        wxString footprint = GetFootprintFieldText( true, aPath, false );
 
        wxArrayString parts = wxSplit( footprint, ':' );
 
        if( parts.Count() > 0 )
            *token = parts[ 0 ];
        else
            *token = wxEmptyString;
 
        return true;
    }
    else if( token->IsSameAs( wxT( "FOOTPRINT_NAME" ) ) )
    {
        wxString footprint = GetFootprintFieldText( true, aPath, false );
 
        wxArrayString parts = wxSplit( footprint, ':' );
 
        if( parts.Count() > 1 )
            *token = parts[ std::min( 1, (int) parts.size() - 1 ) ];
        else
            *token = wxEmptyString;
 
        return true;
    }
    else if( token->IsSameAs( wxT( "UNIT" ) ) )
    {
        *token = SubReference( GetUnitSelection( aPath ) );
        return true;
    }
    else if( token->IsSameAs( wxT( "SHORT_REFERENCE" ) ) )
    {
        *token = GetRef( aPath, false );
        return true;
    }
    else if( token->IsSameAs( wxT( "SYMBOL_LIBRARY" ) ) )
    {
        *token = m_lib_id.GetUniStringLibNickname();
        return true;
    }
    else if( token->IsSameAs( wxT( "SYMBOL_NAME" ) ) )
    {
        *token = m_lib_id.GetUniStringLibItemName();
        return true;
    }
    else if( token->IsSameAs( wxT( "SYMBOL_DESCRIPTION" ) ) )
    {
        *token = GetDescription();
        return true;
    }
    else if( token->IsSameAs( wxT( "SYMBOL_KEYWORDS" ) ) )
    {
        *token = GetKeyWords();
        return true;
    }
    else if( token->IsSameAs( wxT( "EXCLUDE_FROM_BOM" ) ) )
    {
        *token = wxEmptyString;
 
        if( aPath->GetExcludedFromBOM() || this->ResolveExcludedFromBOM() )
            *token = _( "Excluded from BOM" );
 
        return true;
    }
    else if( token->IsSameAs( wxT( "EXCLUDE_FROM_BOARD" ) ) )
    {
        *token = wxEmptyString;
 
        if( aPath->GetExcludedFromBoard() || this->ResolveExcludedFromBoard() )
            *token = _( "Excluded from board" );
 
        return true;
    }
    else if( token->IsSameAs( wxT( "EXCLUDE_FROM_SIM" ) ) )
    {
        *token = wxEmptyString;
 
        if( aPath->GetExcludedFromSim() || this->ResolveExcludedFromSim() )
            *token = _( "Excluded from simulation" );
 
        return true;
    }
    else if( token->IsSameAs( wxT( "DNP" ) ) )
    {
        *token = wxEmptyString;
 
        if( aPath->GetDNP() || this->ResolveDNP() )
            *token = _( "DNP" );
 
        return true;
    }
    else if( token->StartsWith( wxT( "SHORT_NET_NAME(" ) )
                 || token->StartsWith( wxT( "NET_NAME(" ) )
                 || token->StartsWith( wxT( "NET_CLASS(" ) )
                 || token->StartsWith( wxT( "PIN_NAME(" ) ) )
    {
        wxString pinNumber = token->AfterFirst( '(' );
        pinNumber = pinNumber.BeforeLast( ')' );
 
        for( SCH_PIN* pin : GetPins( aPath ) )
        {
            if( pin->GetNumber() == pinNumber )
            {
                if( token->StartsWith( wxT( "PIN_NAME" ) ) )
                {
                    *token = pin->GetAlt().IsEmpty() ? pin->GetName() : pin->GetAlt();
                    return true;
                }
 
                SCH_CONNECTION* conn = pin->Connection( aPath );
 
                if( !conn )
                    *token = wxEmptyString;
                else if( token->StartsWith( wxT( "SHORT_NET_NAME" ) ) )
                    *token = conn->LocalName();
                else if( token->StartsWith( wxT( "NET_NAME" ) ) )
                    *token = conn->Name();
                else if( token->StartsWith( wxT( "NET_CLASS" ) ) )
                    *token = pin->GetEffectiveNetClass( aPath )->GetName();
 
                return true;
            }
        }
    }
 
    // See if parent can resolve it (this will recurse to ancestors)
    if( aPath->Last() && aPath->Last()->ResolveTextVar( aPath, token, aDepth + 1 ) )
        return true;
 
    return false;
}
 
 
void SCH_SYMBOL::ClearAnnotation( const SCH_SHEET_PATH* aSheetPath, bool aResetPrefix )
{
    if( aSheetPath )
    {
        KIID_PATH path = aSheetPath->Path();
 
        for( SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
        {
            if( instance.m_Path == path )
            {
                if( instance.m_Reference.IsEmpty() || aResetPrefix )
                    instance.m_Reference = UTIL::GetRefDesUnannotated( m_prefix );
                else
                    instance.m_Reference = UTIL::GetRefDesUnannotated( instance.m_Reference );
            }
        }
    }
    else
    {
        for( SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
        {
            if( instance.m_Reference.IsEmpty() || aResetPrefix)
                instance.m_Reference = UTIL::GetRefDesUnannotated( m_prefix );
            else
                instance.m_Reference = UTIL::GetRefDesUnannotated( instance.m_Reference );
        }
    }
 
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
        pin->ClearDefaultNetName( aSheetPath );
 
    // These 2 changes do not work in complex hierarchy.
    // When a clear annotation is made, the calling function must call a
    // UpdateAllScreenReferences for the active sheet.
    // But this call cannot made here.
    wxString currentReference = GetField( FIELD_T::REFERENCE )->GetText();
 
    if( currentReference.IsEmpty() || aResetPrefix )
        GetField( FIELD_T::REFERENCE )->SetText( UTIL::GetRefDesUnannotated( m_prefix ) );
    else
        GetField( FIELD_T::REFERENCE )->SetText( UTIL::GetRefDesUnannotated( currentReference ) );
}
 
 
bool SCH_SYMBOL::AddSheetPathReferenceEntryIfMissing( const KIID_PATH& aSheetPath )
{
    // An empty sheet path is illegal, at a minimum the root sheet UUID must be present.
    wxCHECK( aSheetPath.size() > 0, false );
 
    for( const SCH_SYMBOL_INSTANCE& instance : m_instanceReferences )
    {
        // if aSheetPath is found, nothing to do:
        if( instance.m_Path == aSheetPath )
            return false;
    }
 
    // This entry does not exist: add it, with its last-used reference
    AddHierarchicalReference( aSheetPath, GetField( FIELD_T::REFERENCE )->GetText(), m_unit );
    return true;
}
 
 
void SCH_SYMBOL::SetOrientation( int aOrientation )
{
    TRANSFORM temp = TRANSFORM();
    bool transform = false;
 
    switch( aOrientation )
    {
    case SYM_ORIENT_0:
    case SYM_NORMAL:                    // default transform matrix
        m_transform = TRANSFORM();
        break;
 
    case SYM_ROTATE_COUNTERCLOCKWISE:  // Rotate + (incremental rotation)
        temp.x1   = 0;
        temp.y1   = 1;
        temp.x2   = -1;
        temp.y2   = 0;
        transform = true;
        break;
 
    case SYM_ROTATE_CLOCKWISE:          // Rotate - (incremental rotation)
        temp.x1   = 0;
        temp.y1   = -1;
        temp.x2   = 1;
        temp.y2   = 0;
        transform = true;
        break;
 
    case SYM_MIRROR_Y:                  // Mirror Y (incremental transform)
        temp.x1   = -1;
        temp.y1   = 0;
        temp.x2   = 0;
        temp.y2   = 1;
        transform = true;
        break;
 
    case SYM_MIRROR_X:                  // Mirror X (incremental transform)
        temp.x1   = 1;
        temp.y1   = 0;
        temp.x2   = 0;
        temp.y2   = -1;
        transform = true;
        break;
 
    case SYM_ORIENT_90:
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_ROTATE_COUNTERCLOCKWISE );
        break;
 
    case SYM_ORIENT_180:
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_ROTATE_COUNTERCLOCKWISE );
        SetOrientation( SYM_ROTATE_COUNTERCLOCKWISE );
        break;
 
    case SYM_ORIENT_270:
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_ROTATE_CLOCKWISE );
        break;
 
    case ( SYM_ORIENT_0 + SYM_MIRROR_X ):
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_MIRROR_X );
        break;
 
    case ( SYM_ORIENT_0 + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_0 + SYM_MIRROR_X + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_0 );
        SetOrientation( SYM_MIRROR_X );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_90 + SYM_MIRROR_X ):
        SetOrientation( SYM_ORIENT_90 );
        SetOrientation( SYM_MIRROR_X );
        break;
 
    case ( SYM_ORIENT_90 + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_90 );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_90 + SYM_MIRROR_X + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_90 );
        SetOrientation( SYM_MIRROR_X );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_180 + SYM_MIRROR_X ):
        SetOrientation( SYM_ORIENT_180 );
        SetOrientation( SYM_MIRROR_X );
        break;
 
    case ( SYM_ORIENT_180 + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_180 );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_180 + SYM_MIRROR_X + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_180 );
        SetOrientation( SYM_MIRROR_X );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_270 + SYM_MIRROR_X ):
        SetOrientation( SYM_ORIENT_270 );
        SetOrientation( SYM_MIRROR_X );
        break;
 
    case ( SYM_ORIENT_270 + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_270 );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    case ( SYM_ORIENT_270 + SYM_MIRROR_X + SYM_MIRROR_Y ):
        SetOrientation( SYM_ORIENT_270 );
        SetOrientation( SYM_MIRROR_X );
        SetOrientation( SYM_MIRROR_Y );
        break;
 
    default:
        transform = false;
        wxFAIL_MSG( "Invalid schematic symbol orientation type." );
        break;
    }
 
    if( transform )
    {
        /* The new matrix transform is the old matrix transform modified by the
         *  requested transformation, which is the temp transform (rot,
         *  mirror ..) in order to have (in term of matrix transform):
         *     transform coord = new_m_transform * coord
         *  where transform coord is the coord modified by new_m_transform from
         *  the initial value coord.
         *  new_m_transform is computed (from old_m_transform and temp) to
         *  have:
         *     transform coord = old_m_transform * temp
         */
        TRANSFORM newTransform;
 
        newTransform.x1 = m_transform.x1 * temp.x1 + m_transform.x2 * temp.y1;
        newTransform.y1 = m_transform.y1 * temp.x1 + m_transform.y2 * temp.y1;
        newTransform.x2 = m_transform.x1 * temp.x2 + m_transform.x2 * temp.y2;
        newTransform.y2 = m_transform.y1 * temp.x2 + m_transform.y2 * temp.y2;
        m_transform = newTransform;
    }
}
 
 
int SCH_SYMBOL::GetOrientation() const
{
    /*
     * This is slow, but also a bizarre algorithm.  I don't feel like unteasing the algorithm right
     * now, so let's just cache it for the moment.
     */
    if( s_transformToOrientationCache.count( m_transform ) )
        return s_transformToOrientationCache.at( m_transform );
 
    int rotate_values[] =
    {
        SYM_ORIENT_0,
        SYM_ORIENT_90,
        SYM_ORIENT_180,
        SYM_ORIENT_270,
        SYM_MIRROR_X + SYM_ORIENT_0,
        SYM_MIRROR_X + SYM_ORIENT_90,
        SYM_MIRROR_X + SYM_ORIENT_270,
        SYM_MIRROR_Y,
        SYM_MIRROR_Y + SYM_ORIENT_0,
        SYM_MIRROR_Y + SYM_ORIENT_90,
        SYM_MIRROR_Y + SYM_ORIENT_180,
        SYM_MIRROR_Y + SYM_ORIENT_270
    };
 
    // Try to find the current transform option:
    TRANSFORM transform = m_transform;
    SCH_SYMBOL temp( *this );
    temp.SetParentGroup( nullptr );
 
    for( int type_rotate : rotate_values )
    {
        temp.SetOrientation( type_rotate );
 
        if( transform == temp.GetTransform() )
        {
            s_transformToOrientationCache[m_transform] = type_rotate;
            return type_rotate;
        }
    }
 
    // Error: orientation not found in list (should not happen)
    wxFAIL_MSG( "Schematic symbol orientation matrix internal error." );
 
    return SYM_NORMAL;
}
 
 
#if defined(DEBUG)
 
void SCH_SYMBOL::Show( int nestLevel, std::ostream& os ) const
{
    // for now, make it look like XML:
    NestedSpace( nestLevel, os ) << '<' << GetClass().Lower().mb_str()
                                 << " ref=\"" << TO_UTF8( GetField( FIELD_T::REFERENCE )->GetName() )
                                 << '"' << " chipName=\""
                                 << GetLibId().Format().wx_str() << '"' << m_pos
                                 << " layer=\"" << m_layer
                                 << '"' << ">\n";
 
    // skip the reference, it's been output already.
    for( int i = 1; i < (int) GetFields().size();  ++i )
    {
        const wxString& value = GetFields()[i].GetText();
 
        if( !value.IsEmpty() )
        {
            NestedSpace( nestLevel + 1, os ) << "<field" << " name=\""
                                             << TO_UTF8( GetFields()[i].GetName() )
                                             << '"' << " value=\""
                                             << TO_UTF8( value ) << "\"/>\n";
        }
    }
 
    NestedSpace( nestLevel, os ) << "</" << TO_UTF8( GetClass().Lower() ) << ">\n";
}
 
#endif
 
 
BOX2I SCH_SYMBOL::doGetBoundingBox( bool aIncludePins, bool aIncludeFields ) const
{
    BOX2I    bBox;
 
    if( m_part )
        bBox = m_part->GetBodyBoundingBox( m_unit, m_bodyStyle, aIncludePins, false );
    else
        bBox = LIB_SYMBOL::GetDummy()->GetBodyBoundingBox( m_unit, m_bodyStyle, aIncludePins,
                                                           false );
 
    bBox = m_transform.TransformCoordinate( bBox );
    bBox.Normalize();
 
    bBox.Offset( m_pos );
 
    if( aIncludeFields )
    {
        for( const SCH_FIELD& field : m_fields )
        {
            if( field.IsVisible() )
                bBox.Merge( field.GetBoundingBox() );
        }
    }
 
    return bBox;
}
 
 
BOX2I SCH_SYMBOL::GetBodyBoundingBox() const
{
    try
    {
        return doGetBoundingBox( false, false );
    }
    catch( const boost::bad_pointer& e )
    {
        wxFAIL_MSG( wxString::Format( wxT( "Boost pointer exception occurred: %s" ), e.what() ) );
        return BOX2I();
    }
}
 
 
BOX2I SCH_SYMBOL::GetBodyAndPinsBoundingBox() const
{
    return doGetBoundingBox( true, false );
}
 
 
const BOX2I SCH_SYMBOL::GetBoundingBox() const
{
    return doGetBoundingBox( true, true );
}
 
 
void SCH_SYMBOL::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList )
{
    wxString msg;
 
    SCH_EDIT_FRAME* schframe = dynamic_cast<SCH_EDIT_FRAME*>( aFrame );
    SCH_SHEET_PATH* currentSheet = schframe ? &schframe->GetCurrentSheet() : nullptr;
 
    auto addExcludes =
            [&]()
            {
                wxArrayString msgs;
 
                if( GetExcludedFromSim() )
                    msgs.Add( _( "Simulation" ) );
 
                if( GetExcludedFromBOM() )
                    msgs.Add( _( "BOM" ) );
 
                if( GetExcludedFromBoard() )
                    msgs.Add( _( "Board" ) );
 
                if( GetDNP( currentSheet ) )
                    msgs.Add( _( "DNP" ) );
 
                msg = wxJoin( msgs, '|' );
                msg.Replace( '|', wxS( ", " ) );
 
                if( !msg.empty() )
                    aList.emplace_back( _( "Exclude from" ), msg );
            };
 
    // part and alias can differ if alias is not the root
    if( m_part )
    {
        if( m_part.get() != LIB_SYMBOL::GetDummy() )
        {
            if( m_part->IsPower() )
            {
                // Don't use GetShownText(); we want to see the variable references here
                aList.emplace_back( _( "Power symbol" ),
                                    KIUI::EllipsizeStatusText( aFrame, GetField( FIELD_T::VALUE )->GetText() ) );
            }
            else
            {
                aList.emplace_back( _( "Reference" ),
                                    UnescapeString( GetRef( currentSheet ) ) );
 
                // Don't use GetShownText(); we want to see the variable references here
                aList.emplace_back( _( "Value" ),
                                    KIUI::EllipsizeStatusText( aFrame, GetField( FIELD_T::VALUE )->GetText() ) );
                addExcludes();
                aList.emplace_back( _( "Name" ),
                                    KIUI::EllipsizeStatusText( aFrame,
                                                               GetLibId().GetLibItemName() ) );
            }
 
#if 0       // Display symbol flags, for debug only
            aList.emplace_back( _( "flags" ), wxString::Format( "%X", GetEditFlags() ) );
#endif
 
            if( !m_part->IsRoot() )
            {
                msg = _( "Missing parent" );
 
                std::shared_ptr< LIB_SYMBOL > parent = m_part->GetParent().lock();
 
                if( parent )
                    msg = parent->GetName();
 
                aList.emplace_back( _( "Derived from" ), UnescapeString( msg ) );
            }
            else if( !m_lib_id.GetLibNickname().empty() )
            {
                aList.emplace_back( _( "Library" ), m_lib_id.GetLibNickname() );
            }
            else
            {
                aList.emplace_back( _( "Library" ), _( "Undefined!!!" ) );
            }
 
            // Display the current associated footprint, if exists.
            // Don't use GetShownText(); we want to see the variable references here
            msg = KIUI::EllipsizeStatusText( aFrame, GetField( FIELD_T::FOOTPRINT )->GetText() );
 
            if( msg.IsEmpty() )
                msg = _( "<Unknown>" );
 
            aList.emplace_back( _( "Footprint" ), msg );
 
            // Display description of the symbol, and keywords found in lib
            aList.emplace_back( _( "Description" ) + wxT( ": " )
                                        + GetField( FIELD_T::DESCRIPTION )->GetText(),
                                _( "Keywords" ) + wxT( ": " ) + m_part->GetKeyWords() );
        }
    }
    else
    {
        aList.emplace_back( _( "Reference" ), GetRef( currentSheet ) );
 
        // Don't use GetShownText(); we want to see the variable references here
        aList.emplace_back( _( "Value" ),
                            KIUI::EllipsizeStatusText( aFrame, GetField( FIELD_T::VALUE )->GetText() ) );
        addExcludes();
        aList.emplace_back( _( "Name" ),
                            KIUI::EllipsizeStatusText( aFrame, GetLibId().GetLibItemName() ) );
 
        wxString libNickname = GetLibId().GetLibNickname();
 
        if( libNickname.empty() )
            msg = _( "No library defined!" );
        else
            msg.Printf( _( "Symbol not found in %s!" ), libNickname );
 
        aList.emplace_back( _( "Library" ), msg );
    }
}
 
 
BITMAPS SCH_SYMBOL::GetMenuImage() const
{
    return BITMAPS::add_component;
}
 
 
EMBEDDED_FILES* SCH_SYMBOL::GetEmbeddedFiles()
{
    std::unique_ptr<LIB_SYMBOL>& libSymbolRef = GetLibSymbolRef();
 
    if( !libSymbolRef )
        return nullptr;
 
    return GetLibSymbolRef()->GetEmbeddedFiles();
}
 
 
void SCH_SYMBOL::MirrorHorizontally( int aCenter )
{
    int dx = m_pos.x;
 
    SetOrientation( SYM_MIRROR_Y );
    MIRROR( m_pos.x, aCenter );
    dx -= m_pos.x;     // dx,0 is the move vector for this transform
 
    for( SCH_FIELD& field : m_fields )
    {
        // Move the fields to the new position because the symbol itself has moved.
        VECTOR2I pos = field.GetTextPos();
        pos.x -= dx;
        field.SetTextPos( pos );
    }
}
 
 
void SCH_SYMBOL::MirrorVertically( int aCenter )
{
    int dy = m_pos.y;
 
    SetOrientation( SYM_MIRROR_X );
    MIRROR( m_pos.y, aCenter );
    dy -= m_pos.y;     // 0,dy is the move vector for this transform
 
    for( SCH_FIELD& field : m_fields )
    {
        // Move the fields to the new position because the symbol itself has moved.
        VECTOR2I pos = field.GetTextPos();
        pos.y -= dy;
        field.SetTextPos( pos );
    }
}
 
 
void SCH_SYMBOL::Rotate( const VECTOR2I& aCenter, bool aRotateCCW )
{
    VECTOR2I prev = m_pos;
 
    RotatePoint( m_pos, aCenter, aRotateCCW ? ANGLE_90 : ANGLE_270 );
 
    SetOrientation( aRotateCCW ? SYM_ROTATE_COUNTERCLOCKWISE : SYM_ROTATE_CLOCKWISE );
 
    for( SCH_FIELD& field : m_fields )
    {
        // Move the fields to the new position because the symbol itself has moved.
        VECTOR2I pos = field.GetTextPos();
        pos.x -= prev.x - m_pos.x;
        pos.y -= prev.y - m_pos.y;
        field.SetTextPos( pos );
    }
}
 
 
bool SCH_SYMBOL::Matches( const EDA_SEARCH_DATA& aSearchData, void* aAuxData ) const
{
    if( aSearchData.searchMetadata )
    {
        if( EDA_ITEM::Matches( GetSchSymbolLibraryName(), aSearchData ) )
            return true;
 
        if( EDA_ITEM::Matches( GetDescription(), aSearchData ) )
            return true;
 
        if( EDA_ITEM::Matches( GetKeyWords(), aSearchData ) )
            return true;
    }
 
    for( SCH_ITEM& drawItem : GetLibSymbolRef()->GetDrawItems() )
    {
        if( drawItem.Matches( aSearchData, aAuxData ) )
            return true;
    }
 
    // Symbols are searchable via the child field and pin item text.
    return false;
}
 
 
void SCH_SYMBOL::GetEndPoints( std::vector <DANGLING_END_ITEM>& aItemList )
{
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        SCH_PIN* lib_pin = pin->GetLibPin();
 
        if( lib_pin && lib_pin->GetUnit() && m_unit && ( m_unit != lib_pin->GetUnit() ) )
            continue;
 
        DANGLING_END_ITEM item( PIN_END, lib_pin, GetPinPhysicalPosition( lib_pin ), this );
        aItemList.push_back( item );
    }
}
 
 
bool SCH_SYMBOL::UpdateDanglingState( std::vector<DANGLING_END_ITEM>& aItemListByType,
                                      std::vector<DANGLING_END_ITEM>& aItemListByPos,
                                      const SCH_SHEET_PATH*           aPath )
{
    bool changed = false;
 
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        bool previousState = pin->IsDangling();
        pin->SetIsDangling( true );
 
        VECTOR2I pos = m_transform.TransformCoordinate( pin->GetLocalPosition() ) + m_pos;
 
        auto lower = DANGLING_END_ITEM_HELPER::get_lower_pos( aItemListByPos, pos );
        bool do_break = false;
 
        for( auto it = lower; it < aItemListByPos.end() && it->GetPosition() == pos; it++ )
        {
            DANGLING_END_ITEM& each_item = *it;
 
            // Some people like to stack pins on top of each other in a symbol to indicate
            // internal connection. While technically connected, it is not particularly useful
            // to display them that way, so skip any pins that are in the same symbol as this
            // one.
            if( each_item.GetParent() == this )
                continue;
 
            switch( each_item.GetType() )
            {
            case PIN_END:
            case LABEL_END:
            case SHEET_LABEL_END:
            case WIRE_END:
            case NO_CONNECT_END:
            case JUNCTION_END:
                pin->SetIsDangling( false );
                do_break = true;
                break;
 
            default:
                break;
            }
 
            if( do_break )
                break;
        }
 
        changed = ( changed || ( previousState != pin->IsDangling() ) );
    }
 
    return changed;
}
 
 
VECTOR2I SCH_SYMBOL::GetPinPhysicalPosition( const SCH_PIN* aPin ) const
{
    if( ( aPin == nullptr ) || ( aPin->Type() != SCH_PIN_T ) )
        return VECTOR2I( 0, 0 );
 
    return m_transform.TransformCoordinate( aPin->GetPosition() ) + m_pos;
}
 
 
bool SCH_SYMBOL::HasConnectivityChanges( const SCH_ITEM* aItem,
                                         const SCH_SHEET_PATH* aInstance ) const
{
    // Do not compare to ourself.
    if( aItem == this )
        return false;
 
    const SCH_SYMBOL* symbol = dynamic_cast<const SCH_SYMBOL*>( aItem );
 
    // Don't compare against a different SCH_ITEM.
    wxCHECK( symbol, false );
 
    // The move algorithm marks any pins that are being moved without something attached
    // (during the move) as dangling. We always need to recheck connectivity in this case
    // or we will not notice changes when the user places the symbol back in the same position
    // it started.
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( pin->IsDangling() )
            return true;
    }
 
    if( GetPosition() != symbol->GetPosition() )
        return true;
 
    if( GetLibId() != symbol->GetLibId() )
        return true;
 
    if( GetUnitSelection( aInstance ) != symbol->GetUnitSelection( aInstance ) )
        return true;
 
    if( GetRef( aInstance ) != symbol->GetRef( aInstance ) )
        return true;
 
    // Power symbol value field changes are connectivity changes.
    if( IsPower()
      && ( GetValue( true, aInstance, false ) != symbol->GetValue( true, aInstance, false ) ) )
        return true;
 
    if( m_pins.size() != symbol->m_pins.size() )
        return true;
 
    for( size_t i = 0; i < m_pins.size(); i++ )
    {
        if( m_pins[i]->HasConnectivityChanges( symbol->m_pins[i].get() ) )
            return true;
    }
 
    return false;
}
 
 
std::vector<VECTOR2I> SCH_SYMBOL::GetConnectionPoints() const
{
    std::vector<VECTOR2I> retval;
 
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        // Collect only pins attached to the current unit and convert.
        // others are not associated to this symbol instance
        int pin_unit      = pin->GetLibPin() ? pin->GetLibPin()->GetUnit()
                                             : GetUnit();
        int pin_bodyStyle = pin->GetLibPin() ? pin->GetLibPin()->GetBodyStyle()
                                             : GetBodyStyle();
 
        if( pin_unit > 0 && pin_unit != GetUnit() )
            continue;
 
        if( pin_bodyStyle > 0 && pin_bodyStyle != GetBodyStyle() )
            continue;
 
        retval.push_back( m_transform.TransformCoordinate( pin->GetLocalPosition() ) + m_pos );
    }
 
    return retval;
}
 
 
SCH_ITEM* SCH_SYMBOL::GetDrawItem( const VECTOR2I& aPosition, KICAD_T aType )
{
    if( m_part )
    {
        // Calculate the position relative to the symbol.
        VECTOR2I libPosition = aPosition - m_pos;
 
        return m_part->LocateDrawItem( m_unit, m_bodyStyle, aType, libPosition, m_transform );
    }
 
    return nullptr;
}
 
 
wxString SCH_SYMBOL::GetItemDescription( UNITS_PROVIDER* aUnitsProvider, bool aFull ) const
{
    return wxString::Format( _( "Symbol %s [%s]" ),
                             KIUI::EllipsizeMenuText( GetField( FIELD_T::REFERENCE )->GetText() ),
                             KIUI::EllipsizeMenuText( GetLibId().GetLibItemName() ) );
}
 
 
INSPECT_RESULT SCH_SYMBOL::Visit( INSPECTOR aInspector, void* aTestData,
                                  const std::vector<KICAD_T>& aScanTypes )
{
    for( KICAD_T scanType : aScanTypes )
    {
        if( scanType == SCH_LOCATE_ANY_T || ( scanType == SCH_SYMBOL_T )
            || ( scanType == SCH_SYMBOL_LOCATE_POWER_T && m_part && m_part->IsPower() ) )
        {
            if( INSPECT_RESULT::QUIT == aInspector( this, aTestData ) )
                return INSPECT_RESULT::QUIT;
        }
 
        if( scanType == SCH_LOCATE_ANY_T || scanType == SCH_FIELD_T )
        {
            for( SCH_FIELD& field : m_fields )
            {
                if( INSPECT_RESULT::QUIT == aInspector( &field, (void*) this ) )
                    return INSPECT_RESULT::QUIT;
            }
        }
 
        if( scanType == SCH_FIELD_LOCATE_REFERENCE_T )
        {
            if( INSPECT_RESULT::QUIT == aInspector( GetField( FIELD_T::REFERENCE ), (void*) this ) )
                return INSPECT_RESULT::QUIT;
        }
 
        if( scanType == SCH_FIELD_LOCATE_VALUE_T
            || ( scanType == SCH_SYMBOL_LOCATE_POWER_T && m_part && m_part->IsPower() ) )
        {
            if( INSPECT_RESULT::QUIT == aInspector( GetField( FIELD_T::VALUE ), (void*) this ) )
                return INSPECT_RESULT::QUIT;
        }
 
        if( scanType == SCH_FIELD_LOCATE_FOOTPRINT_T )
        {
            if( INSPECT_RESULT::QUIT == aInspector( GetField( FIELD_T::FOOTPRINT ), (void*) this ) )
                return INSPECT_RESULT::QUIT;
        }
 
        if( scanType == SCH_FIELD_LOCATE_DATASHEET_T )
        {
            if( INSPECT_RESULT::QUIT == aInspector( GetField( FIELD_T::DATASHEET ), (void*) this ) )
                return INSPECT_RESULT::QUIT;
        }
 
        if( scanType == SCH_LOCATE_ANY_T || scanType == SCH_PIN_T )
        {
            for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
            {
                // Collect only pins attached to the current unit and convert.
                // others are not associated to this symbol instance
                int pin_unit      = pin->GetLibPin() ? pin->GetLibPin()->GetUnit()
                                                     : GetUnit();
                int pin_bodyStyle = pin->GetLibPin() ? pin->GetLibPin()->GetBodyStyle()
                                                     : GetBodyStyle();
 
                if( pin_unit > 0 && pin_unit != GetUnit() )
                    continue;
 
                if( pin_bodyStyle > 0 && pin_bodyStyle != GetBodyStyle() )
                    continue;
 
                if( INSPECT_RESULT::QUIT == aInspector( pin.get(), (void*) this ) )
                    return INSPECT_RESULT::QUIT;
            }
        }
    }
 
    return INSPECT_RESULT::CONTINUE;
}
 
 
bool SCH_SYMBOL::operator <( const SCH_ITEM& aItem ) const
{
    if( Type() != aItem.Type() )
        return Type() < aItem.Type();
 
    const SCH_SYMBOL* symbol = static_cast<const SCH_SYMBOL*>( &aItem );
 
    BOX2I rect = GetBodyAndPinsBoundingBox();
 
    if( rect.GetArea() != symbol->GetBodyAndPinsBoundingBox().GetArea() )
        return rect.GetArea() < symbol->GetBodyAndPinsBoundingBox().GetArea();
 
    if( m_pos.x != symbol->m_pos.x )
        return m_pos.x < symbol->m_pos.x;
 
    if( m_pos.y != symbol->m_pos.y )
        return m_pos.y < symbol->m_pos.y;
 
    return m_Uuid < aItem.m_Uuid;       // Ensure deterministic sort
}
 
 
bool SCH_SYMBOL::operator==( const SCH_SYMBOL& aSymbol ) const
{
    std::vector<SCH_FIELD*> fields, otherFields;
 
    GetFields( fields, false );
    aSymbol.GetFields( otherFields, false );
 
    if( fields.size() != otherFields.size() )
        return false;
 
    for( int ii = 0; ii < (int) fields.size(); ii++ )
    {
        if( fields[ii]->GetId() == FIELD_T::REFERENCE )
            continue;
 
        if( fields[ii]->GetText().Cmp( otherFields[ii]->GetText() ) != 0 )
            return false;
    }
 
    return true;
}
 
 
bool SCH_SYMBOL::operator!=( const SCH_SYMBOL& aSymbol ) const
{
    return !( *this == aSymbol );
}
 
 
SCH_SYMBOL& SCH_SYMBOL::operator=( const SCH_SYMBOL& aSymbol )
{
    wxCHECK_MSG( Type() == aSymbol.Type(), *this,
                 wxT( "Cannot assign object type " ) + aSymbol.GetClass() + wxT( " to type " ) +
                 GetClass() );
 
    if( &aSymbol != this )
    {
        SYMBOL::operator=( aSymbol );
 
        m_lib_id    = aSymbol.m_lib_id;
        m_part.reset( aSymbol.m_part ? new LIB_SYMBOL( *aSymbol.m_part ) : nullptr );
        m_pos       = aSymbol.m_pos;
        m_unit      = aSymbol.m_unit;
        m_bodyStyle = aSymbol.m_bodyStyle;
        m_transform = aSymbol.m_transform;
 
        m_instanceReferences = aSymbol.m_instanceReferences;
 
        m_fields    = aSymbol.m_fields;    // std::vector's assignment operator
 
        // Reparent fields after assignment to new symbol.
        for( SCH_FIELD& field : m_fields )
            field.SetParent( this );
 
        UpdatePins();
    }
 
    return *this;
}
 
 
bool SCH_SYMBOL::HitTest( const VECTOR2I& aPosition, int aAccuracy ) const
{
    BOX2I bBox = GetBodyBoundingBox();
    bBox.Inflate( aAccuracy / 2 );
 
    if( bBox.Contains( aPosition ) )
        return true;
 
    return false;
}
 
 
bool SCH_SYMBOL::HitTest( const BOX2I& aRect, bool aContained, int aAccuracy ) const
{
    if( m_flags & STRUCT_DELETED || m_flags & SKIP_STRUCT )
        return false;
 
    BOX2I rect = aRect;
 
    rect.Inflate( aAccuracy / 2 );
 
    if( aContained )
        return rect.Contains( GetBodyBoundingBox() );
 
    return rect.Intersects( GetBodyBoundingBox() );
}
 
 
bool SCH_SYMBOL::HitTest( const SHAPE_LINE_CHAIN& aPoly, bool aContained ) const
{
    if( m_flags & STRUCT_DELETED || m_flags & SKIP_STRUCT )
        return false;
 
    return KIGEOM::BoxHitTest( aPoly, GetBodyBoundingBox(), aContained );
}
 
 
bool SCH_SYMBOL::doIsConnected( const VECTOR2I& aPosition ) const
{
    VECTOR2I new_pos = m_transform.InverseTransform().TransformCoordinate( aPosition - m_pos );
 
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( pin->GetType() == ELECTRICAL_PINTYPE::PT_NC )
            continue;
 
        // Collect only pins attached to the current unit and convert.
        // others are not associated to this symbol instance
        if( pin->GetUnit() > 0 && pin->GetUnit() != GetUnit() )
            continue;
 
        if( pin->GetBodyStyle() > 0 && pin->GetBodyStyle() != GetBodyStyle() )
            continue;
 
        if( pin->GetLocalPosition() == new_pos )
            return true;
    }
 
    return false;
}
 
 
bool SCH_SYMBOL::IsInNetlist() const
{
    return m_isInNetlist;
}
 
 
void SCH_SYMBOL::Plot( PLOTTER* aPlotter, bool aBackground, const SCH_PLOT_OPTS& aPlotOpts,
                       int aUnit, int aBodyStyle, const VECTOR2I& aOffset, bool aDimmed )
{
    if( aBackground )
        return;
 
    if( m_part )
    {
    std::vector<SCH_PIN*> libPins = m_part->GetGraphicalPins( GetUnit(), GetBodyStyle() );
 
        // Copy the source so we can re-orient and translate it.
        LIB_SYMBOL            tempSymbol( *m_part );
    std::vector<SCH_PIN*> tempPins = tempSymbol.GetGraphicalPins( GetUnit(), GetBodyStyle() );
 
        // Copy the pin info from the symbol to the temp pins
        for( unsigned i = 0; i < tempPins.size(); ++ i )
        {
            SCH_PIN* symbolPin = GetPin( libPins[ i ] );
            SCH_PIN* tempPin = tempPins[ i ];
 
            tempPin->SetName( symbolPin->GetShownName() );
            tempPin->SetType( symbolPin->GetType() );
            tempPin->SetShape( symbolPin->GetShape() );
 
            if( symbolPin->IsDangling() )
                tempPin->SetFlags( IS_DANGLING );
        }
 
        for( SCH_ITEM& item : tempSymbol.GetDrawItems() )
        {
            if( EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( &item ) )
            {
                // Use SCH_FIELD's text resolver
                SCH_FIELD dummy( this, FIELD_T::USER );
                dummy.SetText( text->GetText() );
                text->SetText( dummy.GetShownText( false ) );
            }
        }
 
        SCH_RENDER_SETTINGS* renderSettings = getRenderSettings( aPlotter );
        TRANSFORM            savedTransform = renderSettings->m_Transform;
        renderSettings->m_Transform = GetTransform();
        aPlotter->StartBlock( nullptr );
 
        for( bool local_background : { true, false } )
        {
            tempSymbol.Plot( aPlotter, local_background, aPlotOpts, GetUnit(), GetBodyStyle(),
                             m_pos, GetDNP() );
 
            for( SCH_FIELD field : m_fields )
            {
                field.ClearRenderCache();
                field.Plot( aPlotter, local_background, aPlotOpts, GetUnit(), GetBodyStyle(),
                            m_pos, GetDNP() );
            }
        }
 
        if( m_DNP )
            PlotDNP( aPlotter );
 
        SCH_SHEET_PATH* sheet = &Schematic()->CurrentSheet();
 
        // Plot attributes to a hypertext menu
        if( aPlotOpts.m_PDFPropertyPopups )
        {
            std::vector<wxString> properties;
 
            for( const SCH_FIELD& field : GetFields() )
            {
                wxString text_field = field.GetShownText( sheet, false);
 
                if( text_field.IsEmpty() )
                    continue;
 
                properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
                                                           field.GetName(), text_field ) );
            }
 
            if( !m_part->GetKeyWords().IsEmpty() )
            {
                properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
                                                           _( "Keywords" ),
                                                           m_part->GetKeyWords() ) );
            }
 
            aPlotter->HyperlinkMenu( GetBoundingBox(), properties );
        }
 
        aPlotter->EndBlock( nullptr );
        renderSettings->m_Transform = savedTransform;
 
        if( !m_part->IsPower() )
            aPlotter->Bookmark( GetBoundingBox(), GetRef( sheet ), _( "Symbols" ) );
    }
}
 
 
void SCH_SYMBOL::PlotDNP( PLOTTER* aPlotter ) const
{
    BOX2I           bbox = GetBodyBoundingBox();
    BOX2I           pins = GetBodyAndPinsBoundingBox();
    VECTOR2D        margins( std::max( bbox.GetX() - pins.GetX(),
                                       pins.GetEnd().x - bbox.GetEnd().x ),
                             std::max( bbox.GetY() - pins.GetY(),
                                       pins.GetEnd().y - bbox.GetEnd().y ) );
    int             strokeWidth = 3.0 * schIUScale.MilsToIU( DEFAULT_LINE_WIDTH_MILS );
 
    margins.x = std::max( margins.x * 0.6, margins.y * 0.3 );
    margins.y = std::max( margins.y * 0.6, margins.x * 0.3 );
    bbox.Inflate( KiROUND( margins.x ), KiROUND( margins.y ) );
 
    SCH_RENDER_SETTINGS* renderSettings = getRenderSettings( aPlotter );
    aPlotter->SetColor( renderSettings->GetLayerColor( LAYER_DNP_MARKER ) );
 
    aPlotter->ThickSegment( bbox.GetOrigin(), bbox.GetEnd(), strokeWidth, nullptr );
 
    aPlotter->ThickSegment( bbox.GetOrigin() + VECTOR2I( bbox.GetWidth(), 0 ),
                            bbox.GetOrigin() + VECTOR2I( 0, bbox.GetHeight() ),
                            strokeWidth, nullptr );
}
 
 
void SCH_SYMBOL::PlotPins( PLOTTER* aPlotter ) const
{
    if( m_part )
    {
        SCH_RENDER_SETTINGS* renderSettings = getRenderSettings( aPlotter );
        TRANSFORM            savedTransform = renderSettings->m_Transform;
        renderSettings->m_Transform = GetTransform();
 
    std::vector<SCH_PIN*> libPins = m_part->GetGraphicalPins( GetUnit(), GetBodyStyle() );
 
        // Copy the source to stay const
        LIB_SYMBOL            tempSymbol( *m_part );
    std::vector<SCH_PIN*> tempPins = tempSymbol.GetGraphicalPins( GetUnit(), GetBodyStyle() );
        SCH_PLOT_OPTS         plotOpts;
 
        // Copy the pin info from the symbol to the temp pins
        for( unsigned i = 0; i < tempPins.size(); ++ i )
        {
            SCH_PIN* symbolPin = GetPin( libPins[ i ] );
            SCH_PIN* tempPin = tempPins[ i ];
 
            tempPin->SetName( symbolPin->GetShownName() );
            tempPin->SetType( symbolPin->GetType() );
            tempPin->SetShape( symbolPin->GetShape() );
            tempPin->Plot( aPlotter, false, plotOpts, GetUnit(), GetBodyStyle(), m_pos, GetDNP() );
        }
 
        renderSettings->m_Transform = savedTransform;
    }
}
 
 
bool SCH_SYMBOL::HasBrightenedPins()
{
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        if( pin->IsBrightened() )
            return true;
    }
 
    return false;
}
 
 
void SCH_SYMBOL::ClearBrightenedPins()
{
    for( std::unique_ptr<SCH_PIN>& pin : m_pins )
        pin->ClearBrightened();
}
 
 
/*
 * When modified at the schematic level, we still store the values of these flags in the
 * associated m_part.  If m_part now diverges from other usages, a new derived LIB_SYMBOL
 * will be created and stored locally in the schematic.
 */
bool SCH_SYMBOL::GetShowPinNames() const
{
    return m_part && m_part->GetShowPinNames();
}
 
 
void SCH_SYMBOL::SetShowPinNames( bool aShow )
{
    if( m_part )
        m_part->SetShowPinNames( aShow );
}
 
 
bool SCH_SYMBOL::GetShowPinNumbers() const
{
    return m_part && m_part->GetShowPinNumbers();
}
 
 
void SCH_SYMBOL::SetShowPinNumbers( bool aShow )
{
    if( m_part )
        m_part->SetShowPinNumbers( aShow );
}
 
 
bool SCH_SYMBOL::IsPointClickableAnchor( const VECTOR2I& aPos ) const
{
    for( const std::unique_ptr<SCH_PIN>& pin : m_pins )
    {
        int pin_unit      = pin->GetLibPin() ? pin->GetLibPin()->GetUnit()
                                             : GetUnit();
        int pin_bodyStyle = pin->GetLibPin() ? pin->GetLibPin()->GetBodyStyle()
                                             : GetBodyStyle();
 
        if( pin_unit > 0 && pin_unit != GetUnit() )
            continue;
 
        if( pin_bodyStyle > 0 && pin_bodyStyle != GetBodyStyle() )
            continue;
 
        if( pin->IsPointClickableAnchor( aPos ) )
            return true;
    }
 
    return false;
}
 
 
bool SCH_SYMBOL::IsSymbolLikePowerGlobalLabel() const
{
    // return true if the symbol is equivalent to a global label:
    // It is a Power symbol
    // It has only one pin type Power input
 
    if( !GetLibSymbolRef() || !GetLibSymbolRef()->IsGlobalPower() )
        return false;
 
    std::vector<SCH_PIN*> pin_list = GetAllLibPins();
 
    if( pin_list.size() != 1 )
        return false;
 
    return pin_list[0]->GetType() == ELECTRICAL_PINTYPE::PT_POWER_IN;
}
 
 
bool SCH_SYMBOL::IsSymbolLikePowerLocalLabel() const
{
    // return true if the symbol is equivalent to a local label:
    // It is a Power symbol
    // It has only one pin type Power input
 
    if( !GetLibSymbolRef() || !GetLibSymbolRef()->IsLocalPower() )
        return false;
 
    std::vector<SCH_PIN*> pin_list = GetAllLibPins();
 
    if( pin_list.size() != 1 )
        return false;
 
    return pin_list[0]->GetType() == ELECTRICAL_PINTYPE::PT_POWER_IN;
}
 
 
bool SCH_SYMBOL::IsLocalPower() const
{
    if( !m_part )
        return false;
 
    return m_part->IsLocalPower();
}
 
 
bool SCH_SYMBOL::IsGlobalPower() const
{
    if( !m_part )
        return false;
 
    return m_part->IsGlobalPower();
}
 
 
bool SCH_SYMBOL::IsPower() const
{
    return IsLocalPower() || IsGlobalPower();
}
 
 
bool SCH_SYMBOL::IsNormal() const
{
    wxCHECK( m_part, false );
 
    return m_part->IsNormal();
}
 
 
std::unordered_set<wxString> SCH_SYMBOL::GetComponentClassNames( const SCH_SHEET_PATH* aPath ) const
{
    std::unordered_set<wxString> componentClass;
 
    auto getComponentClassFields =
            [&]( const std::vector<SCH_FIELD>& fields )
            {
                for( const SCH_FIELD& field : fields )
                {
                    if( field.GetCanonicalName() == wxT( "Component Class" ) )
                    {
                        if( field.GetShownText( aPath, false ) != wxEmptyString )
                            componentClass.insert( field.GetShownText( aPath, false ) );
                    }
                }
            };
 
    // First get component classes set on the symbol itself
    getComponentClassFields( m_fields );
 
    // Now get component classes set on any enclosing rule areas
    for( const SCH_RULE_AREA* ruleArea : m_rule_areas_cache )
    {
        for( const SCH_DIRECTIVE_LABEL* label : ruleArea->GetDirectives() )
        {
            getComponentClassFields( label->GetFields() );
        }
    }
 
    return componentClass;
}
 
 
std::optional<SCH_SYMBOL_VARIANT> SCH_SYMBOL::GetVariant( const SCH_SHEET_PATH& aInstance,
                                                          const wxString& aVariantName ) const
{
    SCH_SYMBOL_INSTANCE instance;
 
    if( !GetInstance( instance, aInstance.Path() ) || !instance.m_Variants.contains( aVariantName ) )
        return std::nullopt;
 
    return instance.m_Variants.find( aVariantName )->second;
}
 
 
void SCH_SYMBOL::AddVariant( const SCH_SHEET_PATH& aInstance, const SCH_SYMBOL_VARIANT& aVariant )
{
    SCH_SYMBOL_INSTANCE instance;
 
    // The instance path must already exist.
    if( !GetInstance( instance, aInstance.Path() ) )
        return;
 
    instance.m_Variants.emplace( std::make_pair( aVariant.m_Name, aVariant ) );
}
 
 
void SCH_SYMBOL::DeleteVariant( const SCH_SHEET_PATH& aInstance, const wxString& aVariantName )
{
    SCH_SYMBOL_INSTANCE instance;
 
    // The instance path must already exist.
    if( !GetInstance( instance, aInstance.Path() ) || !instance.m_Variants.contains( aVariantName ) )
        return;
 
    instance.m_Variants.erase( aVariantName );
}
 
 
bool SCH_SYMBOL::operator==( const SCH_ITEM& aOther ) const
{
    if( Type() != aOther.Type() )
        return false;
 
    const SCH_SYMBOL& symbol = static_cast<const SCH_SYMBOL&>( aOther );
 
    if( GetLibId() != symbol.GetLibId() )
        return false;
 
    if( GetPosition() != symbol.GetPosition() )
        return false;
 
    if( GetUnit() != symbol.GetUnit() )
        return false;
 
    if( GetBodyStyle() != symbol.GetBodyStyle() )
        return false;
 
    if( GetTransform() != symbol.GetTransform() )
        return false;
 
    if( GetFields() != symbol.GetFields() )
        return false;
 
    if( m_pins.size() != symbol.m_pins.size() )
        return false;
 
    for( unsigned i = 0; i < m_pins.size(); ++i )
    {
        if( *m_pins[i] != *symbol.m_pins[i] )
            return false;
    }
 
    return true;
}
 
 
double SCH_SYMBOL::Similarity( const SCH_ITEM& aOther ) const
{
    if( Type() != aOther.Type() )
        return 0.0;
 
    const SCH_SYMBOL& symbol = static_cast<const SCH_SYMBOL&>( aOther );
 
    if( GetLibId() != symbol.GetLibId() )
        return 0.0;
 
    if( GetPosition() == symbol.GetPosition() )
        return 1.0;
 
    return 0.0;
}
 
 
static struct SCH_SYMBOL_DESC
{
    SCH_SYMBOL_DESC()
    {
        ENUM_MAP<SYMBOL_ORIENTATION_PROP>::Instance()
                .Map( SYMBOL_ANGLE_0,   wxS( "0" ) )
                .Map( SYMBOL_ANGLE_90,  wxS( "90" ) )
                .Map( SYMBOL_ANGLE_180, wxS( "180" ) )
                .Map( SYMBOL_ANGLE_270, wxS( "270" ) );
 
        PROPERTY_MANAGER& propMgr = PROPERTY_MANAGER::Instance();
        REGISTER_TYPE( SCH_SYMBOL );
        propMgr.InheritsAfter( TYPE_HASH( SCH_SYMBOL ), TYPE_HASH( SYMBOL ) );
 
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, int>( _HKI( "Position X" ),
                    &SCH_SYMBOL::SetX, &SCH_SYMBOL::GetX, PROPERTY_DISPLAY::PT_COORD,
                    ORIGIN_TRANSFORMS::ABS_X_COORD ) );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, int>( _HKI( "Position Y" ),
                    &SCH_SYMBOL::SetY, &SCH_SYMBOL::GetY, PROPERTY_DISPLAY::PT_COORD,
                    ORIGIN_TRANSFORMS::ABS_Y_COORD ) );
 
        propMgr.AddProperty( new PROPERTY_ENUM<SCH_SYMBOL, SYMBOL_ORIENTATION_PROP>( _HKI( "Orientation" ),
                    &SCH_SYMBOL::SetOrientationProp, &SCH_SYMBOL::GetOrientationProp ) );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, bool>( _HKI( "Mirror X" ),
                    &SCH_SYMBOL::SetMirrorX, &SCH_SYMBOL::GetMirrorX ) );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, bool>( _HKI( "Mirror Y" ),
                    &SCH_SYMBOL::SetMirrorY, &SCH_SYMBOL::GetMirrorY ) );
 
        auto hasLibPart =
                []( INSPECTABLE* aItem ) -> bool
                {
                    if( SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( aItem ) )
                        return symbol->GetLibSymbolRef() != nullptr;
 
                    return false;
                };
 
        propMgr.AddProperty( new PROPERTY<SYMBOL, bool>( _HKI( "Pin numbers" ),
                    &SYMBOL::SetShowPinNumbers, &SYMBOL::GetShowPinNumbers ) )
                .SetAvailableFunc( hasLibPart );
 
        propMgr.AddProperty( new PROPERTY<SYMBOL, bool>( _HKI( "Pin names" ),
                    &SYMBOL::SetShowPinNames, &SYMBOL::GetShowPinNames ) )
                .SetAvailableFunc( hasLibPart );
 
        const wxString groupFields = _HKI( "Fields" );
 
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Reference" ),
                    &SCH_SYMBOL::SetRefProp, &SCH_SYMBOL::GetRefProp ),
                    groupFields );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Value" ),
                    &SCH_SYMBOL::SetValueProp, &SCH_SYMBOL::GetValueProp ),
                    groupFields );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Library Link" ),
                    NO_SETTER( SCH_SYMBOL, wxString ), &SCH_SYMBOL::GetSymbolIDAsString ),
                    groupFields );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Library Description" ),
                    NO_SETTER( SCH_SYMBOL, wxString ), &SCH_SYMBOL::GetDescription ),
                    groupFields );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Keywords" ),
                    NO_SETTER( SCH_SYMBOL, wxString ), &SCH_SYMBOL::GetKeyWords ),
                    groupFields );
 
        auto multiUnit =
                [=]( INSPECTABLE* aItem ) -> bool
                {
                    if( SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( aItem ) )
                        return symbol->IsMultiUnit();
 
                    return false;
                };
 
        auto multiBodyStyle =
                [=]( INSPECTABLE* aItem ) -> bool
                {
                    if( SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( aItem ) )
                        return symbol->IsMultiBodyStyle();
 
                    return false;
                };
 
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, int>( _HKI( "Unit" ),
                    &SCH_SYMBOL::SetUnitProp, &SCH_SYMBOL::GetUnitProp ) )
                .SetAvailableFunc( multiUnit )
                .SetChoicesFunc( []( INSPECTABLE* aItem )
                                 {
                                     wxPGChoices choices;
 
                                     if( SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( aItem ) )
                                     {
                                         for( int ii = 1; ii <= symbol->GetUnitCount(); ii++ )
                                             choices.Add( symbol->GetUnitDisplayName( ii, false ), ii );
                                     }
 
                                     return choices;
                                 } );
 
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, wxString>( _HKI( "Body Style" ),
                    &SCH_SYMBOL::SetBodyStyleProp, &SCH_SYMBOL::GetBodyStyleProp ) )
                .SetAvailableFunc( multiBodyStyle )
                .SetChoicesFunc( []( INSPECTABLE* aItem )
                                 {
                                     wxPGChoices choices;
 
                                     if( SCH_SYMBOL* symbol = dynamic_cast<SCH_SYMBOL*>( aItem ) )
                                     {
                                         for( int ii = 1; ii <= symbol->GetBodyStyleCount(); ii++ )
                                             choices.Add( symbol->GetBodyStyleDescription( ii, false ) );
                                     }
 
                                     return choices;
                                 } );
 
        const wxString groupAttributes = _HKI( "Attributes" );
 
        propMgr.AddProperty( new PROPERTY<SYMBOL, bool>( _HKI( "Exclude From Board" ),
                    &SYMBOL::SetExcludedFromBoard, &SYMBOL::GetExcludedFromBoard ),
                    groupAttributes );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, bool>( _HKI( "Exclude From Simulation" ),
                    &SCH_SYMBOL::SetExcludedFromSimProp, &SCH_SYMBOL::GetExcludedFromSimProp ),
                    groupAttributes );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, bool>( _HKI( "Exclude From Bill of Materials" ),
                    &SCH_SYMBOL::SetExcludedFromBOMProp, &SCH_SYMBOL::GetExcludedFromBOMProp ),
                    groupAttributes );
        propMgr.AddProperty( new PROPERTY<SCH_SYMBOL, bool>( _HKI( "Do not Populate" ),
                    &SCH_SYMBOL::SetDNPProp, &SCH_SYMBOL::GetDNPProp ),
                    groupAttributes );
    }
} _SCH_SYMBOL_DESC;
 
ENUM_TO_WXANY( SYMBOL_ORIENTATION_PROP )