footprint.h

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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 (C) 1992-2024 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
 */
 
#ifndef FOOTPRINT_H
#define FOOTPRINT_H
 
#include <deque>
 
#include <template_fieldnames.h>
 
#include <board_item_container.h>
#include <board_item.h>
#include <collectors.h>
#include <component_class_manager.h>
#include <embedded_files.h>
#include <layer_ids.h> // ALL_LAYERS definition.
#include <lset.h>
#include <lib_id.h>
#include <list>
 
#include <zones.h>
#include <convert_shape_list_to_polygon.h>
#include <pcb_item_containers.h>
#include <pcb_text.h>
#include <pcb_field.h>
#include <functional>
#include <math/vector3.h>
 
class LINE_READER;
class EDA_3D_CANVAS;
class PAD;
class BOARD;
class MSG_PANEL_ITEM;
class SHAPE;
class REPORTER;
 
namespace KIGFX {
class VIEW;
}
 
enum INCLUDE_NPTH_T
{
    DO_NOT_INCLUDE_NPTH = false,
    INCLUDE_NPTH = true
};
 
enum FOOTPRINT_ATTR_T
{
    FP_THROUGH_HOLE             = 0x0001,
    FP_SMD                      = 0x0002,
    FP_EXCLUDE_FROM_POS_FILES   = 0x0004,
    FP_EXCLUDE_FROM_BOM         = 0x0008,
    FP_BOARD_ONLY               = 0x0010,   // Footprint has no corresponding symbol
    FP_JUST_ADDED               = 0x0020,   // Footprint just added by netlist update
    FP_ALLOW_SOLDERMASK_BRIDGES = 0x0040,
    FP_ALLOW_MISSING_COURTYARD  = 0x0080,
    FP_DNP                      = 0x0100
};
 
class FP_3DMODEL
{
public:
    FP_3DMODEL() :
        // Initialize with sensible values
        m_Scale { 1, 1, 1 },
        m_Rotation { 0, 0, 0 },
        m_Offset { 0, 0, 0 },
        m_Opacity( 1.0 ),
        m_Show( true )
    {
    }
 
    VECTOR3D m_Scale;       
    VECTOR3D m_Rotation;    
    VECTOR3D m_Offset;      
    double   m_Opacity;
    wxString m_Filename;    
    bool     m_Show;        
 
    bool operator==( const FP_3DMODEL& aOther ) const
    {
        return m_Scale == aOther.m_Scale
                && m_Rotation == aOther.m_Rotation
                && m_Offset == aOther.m_Offset
                && m_Opacity == aOther.m_Opacity
                && m_Filename == aOther.m_Filename
                && m_Show == aOther.m_Show;
    }
};
 
 
class FOOTPRINT : public BOARD_ITEM_CONTAINER, public EMBEDDED_FILES
{
public:
    FOOTPRINT( BOARD* parent );
 
    FOOTPRINT( const FOOTPRINT& aFootprint );
 
    // Move constructor and operator needed due to std containers inside the footprint
    FOOTPRINT( FOOTPRINT&& aFootprint );
 
    ~FOOTPRINT();
 
    FOOTPRINT& operator=( const FOOTPRINT& aOther );
    FOOTPRINT& operator=( FOOTPRINT&& aOther );
 
    void Serialize( google::protobuf::Any &aContainer ) const override;
    bool Deserialize( const google::protobuf::Any &aContainer ) override;
 
    static inline bool ClassOf( const EDA_ITEM* aItem )
    {
        return aItem && aItem->Type() == PCB_FOOTPRINT_T;
    }
 
    LSET GetPrivateLayers() const { return m_privateLayers; }
    void SetPrivateLayers( LSET aLayers ) { m_privateLayers = aLayers; }
 
    void Add( BOARD_ITEM* aItem, ADD_MODE aMode = ADD_MODE::INSERT,
              bool aSkipConnectivity = false ) override;
 
    void Remove( BOARD_ITEM* aItem, REMOVE_MODE aMode = REMOVE_MODE::NORMAL ) override;
 
    void ClearAllNets();
 
    bool FixUuids();
 
    BOX2I GetFpPadsLocalBbox() const;
 
    SHAPE_POLY_SET GetBoundingHull() const;
 
    bool TextOnly() const;
 
    // Virtual function
    const BOX2I GetBoundingBox() const override;
    const BOX2I GetBoundingBox( bool aIncludeText ) const;
 
    const BOX2I GetLayerBoundingBox( LSET aLayers ) const;
 
    VECTOR2I GetCenter() const override
    {
        return GetBoundingBox( false ).GetCenter();
    }
 
    PCB_FIELDS& Fields()                   { return m_fields; }
    const PCB_FIELDS& Fields() const       { return m_fields; }
 
    std::deque<PAD*>& Pads()               { return m_pads; }
    const std::deque<PAD*>& Pads() const   { return m_pads; }
 
    DRAWINGS& GraphicalItems()             { return m_drawings; }
    const DRAWINGS& GraphicalItems() const { return m_drawings; }
 
    ZONES& Zones()                         { return m_zones; }
    const ZONES& Zones() const             { return m_zones; }
 
    GROUPS& Groups()                       { return m_groups; }
    const GROUPS& Groups() const           { return m_groups; }
 
    bool HasThroughHolePads() const;
 
    std::vector<FP_3DMODEL>& Models()             { return m_3D_Drawings; }
    const std::vector<FP_3DMODEL>& Models() const { return m_3D_Drawings; }
 
    void     SetPosition( const VECTOR2I& aPos ) override;
    VECTOR2I GetPosition() const override { return m_pos; }
 
    void SetOrientation( const EDA_ANGLE& aNewAngle );
    EDA_ANGLE GetOrientation() const { return m_orient; }
 
    void SetLayerAndFlip( PCB_LAYER_ID aLayer );
 
    // to make property magic work
    PCB_LAYER_ID GetLayer() const override { return BOARD_ITEM::GetLayer(); }
 
    // For property system:
    void SetOrientationDegrees( double aOrientation )
    {
        SetOrientation( EDA_ANGLE( aOrientation, DEGREES_T ) );
    }
    double GetOrientationDegrees() const
    {
        return m_orient.AsDegrees();
    }
 
    const LIB_ID& GetFPID() const { return m_fpid; }
    void          SetFPID( const LIB_ID& aFPID )
    {
        m_fpid = aFPID;
    }
 
    wxString GetFPIDAsString() const { return m_fpid.Format(); }
    void SetFPIDAsString( const wxString& aFPID ) { m_fpid.Parse( aFPID ); }
 
    wxString GetLibDescription() const { return m_libDescription; }
    void     SetLibDescription( const wxString& aDesc ) { m_libDescription = aDesc; }
 
    wxString GetKeywords() const { return m_keywords; }
    void SetKeywords( const wxString& aKeywords ) { m_keywords = aKeywords; }
 
    const KIID_PATH& GetPath() const { return m_path; }
    void SetPath( const KIID_PATH& aPath ) { m_path = aPath; }
 
    wxString GetSheetname() const { return m_sheetname; }
    void SetSheetname( const wxString& aSheetname ) { m_sheetname = aSheetname; }
 
    wxString GetSheetfile() const { return m_sheetfile; }
    void SetSheetfile( const wxString& aSheetfile ) { m_sheetfile = aSheetfile; }
 
    wxString GetFilters() const { return m_filters; }
    void SetFilters( const wxString& aFilters ) { m_filters = aFilters; }
 
    std::optional<int> GetLocalClearance() const                 { return m_clearance; }
    void SetLocalClearance( std::optional<int> aClearance )      { m_clearance = aClearance; }
 
    std::optional<int> GetLocalSolderMaskMargin() const          { return m_solderMaskMargin; }
    void SetLocalSolderMaskMargin( std::optional<int> aMargin )  { m_solderMaskMargin = aMargin; }
 
    std::optional<int> GetLocalSolderPasteMargin() const         { return m_solderPasteMargin; }
    void SetLocalSolderPasteMargin( std::optional<int> aMargin ) { m_solderPasteMargin = aMargin; }
 
    std::optional<double> GetLocalSolderPasteMarginRatio() const { return m_solderPasteMarginRatio; }
    void SetLocalSolderPasteMarginRatio( std::optional<double> aRatio ) { m_solderPasteMarginRatio = aRatio; }
 
    void SetLocalZoneConnection( ZONE_CONNECTION aType )         { m_zoneConnection = aType; }
    ZONE_CONNECTION GetLocalZoneConnection() const               { return m_zoneConnection; }
 
    int GetAttributes() const { return m_attributes; }
    void SetAttributes( int aAttributes ) { m_attributes = aAttributes; }
 
    void SetFlag( int aFlag ) { m_arflag = aFlag; }
    void IncrementFlag() { m_arflag += 1; }
    int GetFlag() const { return m_arflag; }
 
    bool IsNetTie() const
    {
        for( const wxString& group : m_netTiePadGroups )
        {
            if( !group.IsEmpty() )
                return true;
        }
 
        return false;
    }
 
    std::optional<int> GetLocalClearance( wxString* aSource ) const
    {
        if( m_clearance.has_value() && aSource )
            *aSource = wxString::Format( _( "footprint %s" ), GetReference() );
 
        return m_clearance;
    }
 
    std::optional<int> GetClearanceOverrides( wxString* aSource ) const
    {
        return GetLocalClearance( aSource );
    }
 
    ZONE_CONNECTION GetZoneConnectionOverrides( wxString* aSource ) const
    {
        if( m_zoneConnection != ZONE_CONNECTION::INHERITED && aSource )
            *aSource = wxString::Format( _( "footprint %s" ), GetReference() );
 
        return m_zoneConnection;
    }
 
    const std::vector<wxString>& GetNetTiePadGroups() const { return m_netTiePadGroups; }
 
    void ClearNetTiePadGroups()
    {
        m_netTiePadGroups.clear();
    }
 
    void AddNetTiePadGroup( const wxString& aGroup )
    {
        m_netTiePadGroups.emplace_back( aGroup );
    }
 
    std::map<wxString, int> MapPadNumbersToNetTieGroups() const;
 
    std::vector<PAD*> GetNetTiePads( PAD* aPad ) const;
 
    int GetLikelyAttribute() const;
 
    void Move( const VECTOR2I& aMoveVector ) override;
 
    void Rotate( const VECTOR2I& aRotCentre, const EDA_ANGLE& aAngle ) override;
 
    void Flip( const VECTOR2I& aCentre, FLIP_DIRECTION aFlipDirection ) override;
 
    void MoveAnchorPosition( const VECTOR2I& aMoveVector );
 
    bool IsFlipped() const { return GetLayer() == B_Cu; }
 
    PCB_LAYER_ID GetSide() const;
 
    bool IsOnLayer( PCB_LAYER_ID aLayer ) const override;
 
// m_footprintStatus bits:
#define FP_is_LOCKED        0x01        
#define FP_is_PLACED        0x02        
#define FP_to_PLACE         0x04        
#define FP_PADS_are_LOCKED  0x08
 
 
    bool IsLocked() const override
    {
        return ( m_fpStatus & FP_is_LOCKED ) != 0;
    }
 
    void SetLocked( bool isLocked ) override
    {
        if( isLocked )
            m_fpStatus |= FP_is_LOCKED;
        else
            m_fpStatus &= ~FP_is_LOCKED;
    }
 
    bool IsConflicting() const;
 
    bool IsPlaced() const { return m_fpStatus & FP_is_PLACED;  }
    void SetIsPlaced( bool isPlaced )
    {
        if( isPlaced )
            m_fpStatus |= FP_is_PLACED;
        else
            m_fpStatus &= ~FP_is_PLACED;
    }
 
    bool NeedsPlaced() const { return m_fpStatus & FP_to_PLACE;  }
    void SetNeedsPlaced( bool needsPlaced )
    {
        if( needsPlaced )
            m_fpStatus |= FP_to_PLACE;
        else
            m_fpStatus &= ~FP_to_PLACE;
    }
 
    bool LegacyPadsLocked() const { return m_fpStatus & FP_PADS_are_LOCKED;  }
 
    void CheckFootprintAttributes( const std::function<void( const wxString& )>& aErrorHandler );
 
    void CheckPads( UNITS_PROVIDER* aUnitsProvider,
                    const std::function<void( const PAD*, int, const wxString& )>& aErrorHandler );
 
    void CheckShortingPads( const std::function<void( const PAD*, const PAD*, int aErrorCode,
                                                      const VECTOR2I& )>& aErrorHandler );
 
    void CheckNetTies( const std::function<void( const BOARD_ITEM* aItem,
                                                 const BOARD_ITEM* bItem,
                                                 const BOARD_ITEM* cItem,
                                                 const VECTOR2I& )>& aErrorHandler );
 
    void CheckNetTiePadGroups( const std::function<void( const wxString& )>& aErrorHandler );
 
    void BuildNetTieCache();
 
    const std::set<int>& GetNetTieCache( const BOARD_ITEM* aItem ) const
    {
        static const std::set<int> emptySet;
 
        auto it = m_netTieCache.find( aItem );
 
        if( it == m_netTieCache.end() )
            return emptySet;
 
        return it->second;
    }
 
    void TransformPadsToPolySet( SHAPE_POLY_SET& aBuffer, PCB_LAYER_ID aLayer, int aClearance,
                                 int aMaxError, ERROR_LOC aErrorLoc,
                                 bool aSkipNPTHPadsWihNoCopper = false,
                                 bool aSkipPlatedPads = false,
                                 bool aSkipNonPlatedPads = false ) const;
 
    void TransformFPShapesToPolySet( SHAPE_POLY_SET& aBuffer, PCB_LAYER_ID aLayer, int aClearance,
                                     int aError, ERROR_LOC aErrorLoc,
                                     bool aIncludeText = true,
                                     bool aIncludeShapes = true,
                                     bool aIncludePrivateItems = false ) const;
 
    void TransformFPTextToPolySet( SHAPE_POLY_SET& aBuffer, PCB_LAYER_ID aLayer, int aClearance,
                                   int aError, ERROR_LOC aErrorLoc ) const
    {
        TransformFPShapesToPolySet( aBuffer, aLayer, aClearance, aError, aErrorLoc, true, false );
    }
 
    void GetContextualTextVars( wxArrayString* aVars ) const;
 
    bool ResolveTextVar( wxString* token, int aDepth = 0 ) const;
 
    void GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList ) override;
 
    bool HitTest( const VECTOR2I& aPosition, int aAccuracy = 0 ) const override;
 
    bool HitTestAccurate( const VECTOR2I& aPosition, int aAccuracy = 0 ) const;
 
    bool HitTest( const BOX2I& aRect, bool aContained, int aAccuracy = 0 ) const override;
 
    bool HitTestOnLayer( const VECTOR2I& aPosition, PCB_LAYER_ID aLayer, int aAccuracy = 0 ) const;
 
    bool HitTestOnLayer( const BOX2I& aRect, bool aContained, PCB_LAYER_ID aLayer, int aAccuracy = 0 ) const;
 
    const wxString& GetReference() const { return Reference().GetText(); }
 
    void SetReference( const wxString& aReference ) { Reference().SetText( aReference ); }
 
    // Property system doesn't like const references
    wxString GetReferenceAsString() const
    {
        return GetReference();
    }
 
    void IncrementReference( int aDelta );
 
    const wxString& GetValue() const { return Value().GetText(); }
 
    void SetValue( const wxString& aValue ) { Value().SetText( aValue ); }
 
    // Property system doesn't like const references
    wxString GetValueAsString() const
    {
        return GetValue();
    }
 
    PCB_FIELD& Value()           { return *GetField( VALUE_FIELD ); }
    PCB_FIELD& Reference()       { return *GetField( REFERENCE_FIELD ); }
 
    const PCB_FIELD& Value() const     { return *GetField( VALUE_FIELD ); }
    const PCB_FIELD& Reference() const { return *GetField( REFERENCE_FIELD ); }
 
    //-----<Fields>-----------------------------------------------------------
 
    PCB_FIELD*       GetField( MANDATORY_FIELD_T aFieldType );
    const PCB_FIELD* GetField( MANDATORY_FIELD_T aFieldNdx ) const;
 
    PCB_FIELD* GetFieldById( int aFieldId );
 
    PCB_FIELD* GetFieldByName( const wxString& aFieldName );
 
    bool HasFieldByName( const wxString& aFieldName ) const;
 
    wxString GetFieldText( const wxString& aFieldName ) const;
 
    void GetFields( std::vector<PCB_FIELD*>& aVector, bool aVisibleOnly );
 
    PCB_FIELDS        GetFields() { return m_fields; }
    const PCB_FIELDS& GetFields() const { return m_fields; }
 
    PCB_FIELD* AddField( const PCB_FIELD& aField );
 
    void RemoveField( const wxString& aFieldName );
 
    int GetFieldCount() const { return (int) m_fields.size(); }
 
    void ApplyDefaultSettings( const BOARD& board, bool aStyleFields, bool aStyleText,
                               bool aStyleShapes );
 
    bool IsBoardOnly() const { return m_attributes & FP_BOARD_ONLY; }
    void SetBoardOnly( bool aIsBoardOnly = true )
    {
        if( aIsBoardOnly )
            m_attributes |= FP_BOARD_ONLY;
        else
            m_attributes &= ~FP_BOARD_ONLY;
    }
 
    bool IsExcludedFromPosFiles() const { return m_attributes & FP_EXCLUDE_FROM_POS_FILES; }
    void SetExcludedFromPosFiles( bool aExclude = true )
    {
        if( aExclude )
            m_attributes |= FP_EXCLUDE_FROM_POS_FILES;
        else
            m_attributes &= ~FP_EXCLUDE_FROM_POS_FILES;
    }
 
    bool IsExcludedFromBOM() const { return m_attributes & FP_EXCLUDE_FROM_BOM; }
    void SetExcludedFromBOM( bool aExclude = true )
    {
        if( aExclude )
            m_attributes |= FP_EXCLUDE_FROM_BOM;
        else
            m_attributes &= ~FP_EXCLUDE_FROM_BOM;
    }
 
    bool AllowMissingCourtyard() const { return m_attributes & FP_ALLOW_MISSING_COURTYARD; }
    void SetAllowMissingCourtyard( bool aAllow = true )
    {
        if( aAllow )
            m_attributes |= FP_ALLOW_MISSING_COURTYARD;
        else
            m_attributes &= ~FP_ALLOW_MISSING_COURTYARD;
    }
 
    bool IsDNP() const { return m_attributes & FP_DNP; }
    void SetDNP( bool aDNP = true )
    {
        if( aDNP )
            m_attributes |= FP_DNP;
        else
            m_attributes &= ~FP_DNP;
    }
 
    void SetFileFormatVersionAtLoad( int aVersion ) { m_fileFormatVersionAtLoad = aVersion; }
    int GetFileFormatVersionAtLoad() const { return m_fileFormatVersionAtLoad; }
 
    PAD* FindPadByNumber( const wxString& aPadNumber, PAD* aSearchAfterMe = nullptr ) const;
 
    PAD* GetPad( const VECTOR2I& aPosition, LSET aLayerMask = LSET::AllLayersMask() );
 
    std::vector<const PAD*> GetPads( const wxString& aPadNumber,
                                     const PAD* aIgnore = nullptr ) const;
 
    unsigned GetPadCount( INCLUDE_NPTH_T aIncludeNPTH = INCLUDE_NPTH_T(INCLUDE_NPTH) ) const;
 
    unsigned GetUniquePadCount( INCLUDE_NPTH_T aIncludeNPTH = INCLUDE_NPTH_T(INCLUDE_NPTH) ) const;
 
    std::set<wxString>
    GetUniquePadNumbers( INCLUDE_NPTH_T aIncludeNPTH = INCLUDE_NPTH_T(INCLUDE_NPTH) ) const;
 
    wxString GetNextPadNumber( const wxString& aLastPadName ) const;
 
    void AutoPositionFields();
 
    wxString GetTypeName() const;
 
    double GetArea( int aPadding = 0 ) const;
 
    KIID GetLink() const { return m_link; }
    void SetLink( const KIID& aLink ) { m_link = aLink; }
 
    BOARD_ITEM* Duplicate() const override;
 
    BOARD_ITEM* DuplicateItem( const BOARD_ITEM* aItem, bool aAddToFootprint = false );
 
    void Add3DModel( FP_3DMODEL* a3DModel );
 
    INSPECT_RESULT Visit( INSPECTOR inspector, void* testData,
                          const std::vector<KICAD_T>& aScanTypes ) override;
 
    wxString GetClass() const override
    {
        return wxT( "FOOTPRINT" );
    }
 
    wxString GetItemDescription( UNITS_PROVIDER* aUnitsProvider, bool aFull ) const override;
 
    BITMAPS GetMenuImage() const override;
 
    EDA_ITEM* Clone() const override;
 
    void RunOnChildren( const std::function<void (BOARD_ITEM*)>& aFunction ) const override;
 
    void RunOnDescendants( const std::function<void( BOARD_ITEM* )>& aFunction,
                           int aDepth = 0 ) const override;
 
    virtual std::vector<int> ViewGetLayers() const override;
 
    double ViewGetLOD( int aLayer, KIGFX::VIEW* aView ) const override;
 
    virtual const BOX2I ViewBBox() const override;
 
    static bool IsLibNameValid( const wxString& aName );
 
    static const wxChar* StringLibNameInvalidChars( bool aUserReadable );
 
    bool FootprintNeedsUpdate( const FOOTPRINT* aLibFP, int aCompareFlags = 0,
                               REPORTER* aReporter = nullptr );
 
    void SetInitialComments( wxArrayString* aInitialComments )
    {
        delete m_initial_comments;
        m_initial_comments = aInitialComments;
    }
 
    double CoverageRatio( const GENERAL_COLLECTOR& aCollector ) const;
 
    static double GetCoverageArea( const BOARD_ITEM* aItem, const GENERAL_COLLECTOR& aCollector );
 
    const wxArrayString* GetInitialComments() const { return m_initial_comments; }
 
    const SHAPE_POLY_SET& GetCourtyard( PCB_LAYER_ID aLayer ) const;
 
    const SHAPE_POLY_SET& GetCachedCourtyard( PCB_LAYER_ID aLayer ) const;
 
    void BuildCourtyardCaches( OUTLINE_ERROR_HANDLER* aErrorHandler = nullptr );
 
    // @copydoc BOARD_ITEM::GetEffectiveShape
    std::shared_ptr<SHAPE> GetEffectiveShape( PCB_LAYER_ID aLayer = UNDEFINED_LAYER,
                                              FLASHING aFlash = FLASHING::DEFAULT ) const override;
 
    EMBEDDED_FILES* GetEmbeddedFiles() override
    {
        return static_cast<EMBEDDED_FILES*>( this );
    }
 
    const EMBEDDED_FILES* GetEmbeddedFiles() const
    {
        return static_cast<const EMBEDDED_FILES*>( this );
    }
 
    void EmbedFonts() override;
 
    double Similarity( const BOARD_ITEM& aOther ) const override;
 
    void SetComponentClass( const COMPONENT_CLASS* aClass ) { m_componentClass = aClass; }
 
    const COMPONENT_CLASS* GetComponentClass() const { return m_componentClass; }
 
    wxString GetComponentClassAsString() const;
 
 
    bool operator==( const BOARD_ITEM& aOther ) const override;
    bool operator==( const FOOTPRINT& aOther ) const;
 
#if defined(DEBUG)
    virtual void Show( int nestLevel, std::ostream& os ) const override { ShowDummy( os ); }
#endif
 
    struct cmp_drawings
    {
        bool operator()( const BOARD_ITEM* itemA, const BOARD_ITEM* itemB ) const;
    };
 
    struct cmp_pads
    {
        bool operator()( const PAD* aFirst, const PAD* aSecond ) const;
    };
  // TODO(JE) padstacks -- this code isn't used anywhere though
#if 0
    struct cmp_padstack
    {
        bool operator()( const PAD* aFirst, const PAD* aSecond ) const;
    };
#endif
    struct cmp_zones
    {
        bool operator()( const ZONE* aFirst, const ZONE* aSecond ) const;
    };
 
protected:
    virtual void swapData( BOARD_ITEM* aImage ) override;
 
private:
    PCB_FIELDS      m_fields;
    DRAWINGS        m_drawings;          // BOARD_ITEMs for drawings on the board, owned by pointer.
    std::deque<PAD*> m_pads;              // PAD items, owned by pointer
    ZONES           m_zones;             // PCB_ZONE items, owned by pointer
    GROUPS          m_groups;            // PCB_GROUP items, owned by pointer
 
    EDA_ANGLE       m_orient;            // Orientation
    VECTOR2I        m_pos;               // Position of footprint on the board in internal units.
    LIB_ID          m_fpid;              // The #LIB_ID of the FOOTPRINT.
    int             m_attributes;        // Flag bits (see FOOTPRINT_ATTR_T)
    int             m_fpStatus;          // For autoplace: flags (LOCKED, FIELDS_AUTOPLACED)
    int             m_fileFormatVersionAtLoad;
 
    // Bounding box caching strategy:
    // While we attempt to notice the low-hanging fruit operations and update the bounding boxes
    // accordingly, we rely mostly on a "if anything changed then the caches are stale" approach.
    // We implement this by having PCB_BASE_FRAME's OnModify() method increment an operation
    // counter, and storing that as a timestamp for the various caches.
    // This means caches will get regenerated often -- but still far less often than if we had no
    // caches at all.  The principal opitmization would be to change to dirty flag and make sure
    // that any edit that could affect the bounding boxes (including edits to the footprint
    // children) marked the bounding boxes dirty.  It would definitely be faster -- but also more
    // fragile.
    mutable BOX2I          m_cachedBoundingBox;
    mutable int            m_boundingBoxCacheTimeStamp;
    mutable BOX2I          m_cachedTextExcludedBBox;
    mutable int            m_textExcludedBBoxCacheTimeStamp;
    mutable SHAPE_POLY_SET m_cachedHull;
    mutable int            m_hullCacheTimeStamp;
 
    // A list of pad groups, each of which is allowed to short nets within their group.
    // A pad group is a comma-separated list of pad numbers.
    std::vector<wxString> m_netTiePadGroups;
 
    // A list of 1:N footprint item to allowed net numbers
    std::map<const BOARD_ITEM*, std::set<int>> m_netTieCache;
 
    // Optional overrides
    ZONE_CONNECTION       m_zoneConnection;
    std::optional<int>    m_clearance;
    std::optional<int>    m_solderMaskMargin;       // Solder mask margin
    std::optional<int>    m_solderPasteMargin;      // Solder paste margin absolute value
    std::optional<double> m_solderPasteMarginRatio; // Solder mask margin ratio of pad size
                                                    // The final margin is the sum of these 2 values
 
    wxString        m_libDescription;    // File name and path for documentation file.
    wxString        m_keywords;          // Search keywords to find footprint in library.
    KIID_PATH       m_path;              // Path to associated symbol ([sheetUUID, .., symbolUUID]).
    wxString        m_sheetname;         // Name of the sheet containing the symbol for this footprint
    wxString        m_sheetfile;         // File of the sheet containing the symbol for this footprint
    wxString        m_filters;           // Footprint filters from symbol
    timestamp_t     m_lastEditTime;
    int             m_arflag;            // Use to trace ratsnest and auto routing.
    KIID            m_link;              // Temporary logical link used during editing
    LSET            m_privateLayers;     // Layers visible only in the footprint editor
 
    std::vector<FP_3DMODEL>       m_3D_Drawings;       // 3D models.
    wxArrayString*                m_initial_comments;  // s-expression comments in the footprint,
                                                       // lazily allocated only if needed for speed
 
    SHAPE_POLY_SET   m_courtyard_cache_front; // Note that a footprint can have both front and back
    SHAPE_POLY_SET   m_courtyard_cache_back;  // courtyards populated.
    mutable HASH_128   m_courtyard_cache_front_hash;
    mutable HASH_128   m_courtyard_cache_back_hash;
    mutable std::mutex m_courtyard_cache_mutex;
 
    const COMPONENT_CLASS* m_componentClass;
};
 
#endif     // FOOTPRINT_H