dxf_import_plugin.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 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, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef DXF2BRD_ITEMS_H
#define DXF2BRD_ITEMS_H
 
#include "graphics_import_plugin.h"
#include "graphics_importer_buffer.h"
#include "wx/translation.h"
 
#include <dl_creationadapter.h>
#include <dl_dxf.h>
#include <math/vector3.h>
#include <math/matrix3x3.h>
#include <wildcards_and_files_ext.h>
 
#include <list>
 
class BOARD;
class BOARD_ITEM;

struct SPLINE_CTRL_POINT
{
    double m_x;
    double m_y;
    double m_weight;
 
    SPLINE_CTRL_POINT( double a_x, double a_y, double a_weight )
                    : m_x( a_x ), m_y( a_y ), m_weight( a_weight )
    {}
};

class DXF2BRD_ENTITY_DATA
{
public:
    DXF2BRD_ENTITY_DATA() { Clear(); };
 
    // Reset the entity parameters
    void Clear()
    {
        m_EntityType = DL_UNKNOWN;
        m_EntityParseStatus = 0;
        m_EntityFlag = 0;
        m_LayerName.clear();
        m_SplineDegree = 1;
        m_SplineKnotsCount = 0;
        m_SplineControlCount = 0;
        m_SplineFitCount = 0;
        m_SplineTangentStartX = 0.0;
        m_SplineTangentStartY = 0.0;
        m_SplineTangentEndX = 0.0;
        m_SplineTangentEndY = 0.0;
        m_BulgeVertex = 0.0;
        m_SplineKnotsList.clear();
        m_SplineControlPointList.clear();
        m_SplineFitPointList.clear();
    }
 
    int m_EntityType;           // the DXF type of entity
    int m_EntityParseStatus;    // Inside a entity: status of parsing:
                                // 0 = no entity
                                // 1 = first item of entity
                                // 2 = entity in progress
    int m_EntityFlag;           // a info flag to parse entities
                                //
    wxString m_LayerName;       // the source DXF layer for the current entity
 
    VECTOR2D m_LastCoordinate;  // the last vertex coordinate read (unit = mm)
    VECTOR2D m_PolylineStart;   // The first point of the polyline entity, when reading a
                                // polyline (unit = mm)
    double m_BulgeVertex;       // the last vertex bulge value read
 
    // for spline parsing: parameters
    unsigned int m_SplineDegree;
    unsigned int m_SplineKnotsCount;
    unsigned int m_SplineControlCount;
    unsigned int m_SplineFitCount;
    double m_SplineTangentStartX;   // tangent dir X for the start point
    double m_SplineTangentStartY;   // tangent dir Y for the start point
    double m_SplineTangentEndX;     // tangent dir X for the end point
    double m_SplineTangentEndY;     // tangent dir Y for the end point
 
    // for spline parsing: buffers to store control points, fit points and knot
    std::vector<double> m_SplineKnotsList;          // knots list, code 40
    // control points list coordinates, code 10, 20 & 30 (only X and Y cood and Weight)
    std::vector<SPLINE_CTRL_POINT> m_SplineControlPointList;
    // fit points list, code 11, 21 & 31 (only X and Y cood)
    std::vector<VECTOR2D> m_SplineFitPointList;
};
 
// Magic constants as defined by dxf specification for line weight
#define DXF_IMPORT_LINEWEIGHT_BY_LAYER -1
#define DXF_IMPORT_LINEWEIGHT_BY_BLOCK -2
#define DXF_IMPORT_LINEWEIGHT_BY_LW_DEFAULT -3

class DXF_IMPORT_LAYER
{
public:
    wxString m_layerName;
    int      m_lineWeight;
 
    DXF_IMPORT_LAYER( const wxString& aName, int aLineWeight )
    {
        m_layerName  = aName;
        m_lineWeight = aLineWeight;
    }
};

class DXF_IMPORT_BLOCK
{
public:
    wxString m_name;
    double m_baseX, m_baseY;
 
    GRAPHICS_IMPORTER_BUFFER m_buffer;
 
    DXF_IMPORT_BLOCK( const wxString& aName, double aX, double aY )
    {
        m_name = aName;
        m_baseX = aX;
        m_baseY = aY;
    }
};

class DXF_IMPORT_STYLE
{
public:
    wxString m_name;
    double m_textHeight;
    double m_widthFactor;
    bool m_bold;
    bool m_italic;
 
    DXF_IMPORT_STYLE( const wxString& aName, double aTextHeight, double aWidthFactor, bool aBold,
                      bool aItalic )
    {
        m_name = aName;
        m_textHeight = aTextHeight;
        m_widthFactor = aWidthFactor;
        m_bold = aBold;
        m_italic = aItalic;
    }
};
 

enum class DXF_IMPORT_UNITS
{
    DEFAULT = 0,
    INCH = 1,
    FEET = 2,
    MM = 4,
    CM = 5,
    METERS = 6,
    MICROINCHES = 8,
    MILS = 9,
    YARDS = 10,
    ANGSTROMS = 11,
    NANOMETERS = 12,
    MICRONS = 13,
    DECIMETERS = 14,
    DECAMETERS = 15,
    HECTOMETERS = 16,
    GIGAMETERS = 17,
    ASTRONOMICAL = 18,
    LIGHTYEARS = 19,
    PARSECS = 20
};
 

#define ON_UNSUPPORTED( error_msg ) reportMessage( wxString::Format( _( "%s is not supported." ), \
                                                                     error_msg ) )
 
class DXF_IMPORT_PLUGIN : public GRAPHICS_IMPORT_PLUGIN, public DL_CreationAdapter
{
public:
    DXF_IMPORT_PLUGIN();
    ~DXF_IMPORT_PLUGIN();
 
    const wxString GetName() const override
    {
        return "AutoCAD DXF";
    }
 
    const std::vector<std::string> GetFileExtensions() const override
    {
        static std::vector<std::string> exts = { "dxf" };
        return exts;
    }
 
    bool Load( const wxString& aFileName ) override;
    bool LoadFromMemory( const wxMemoryBuffer& aMemBuffer ) override;
    bool Import() override;
 
    double GetImageWidth() const override;
    double GetImageHeight() const override;
    BOX2D GetImageBBox() const override;
 
    std::vector<wxString> GetSourceLayers() const { return m_internalImporter.GetSourceLayers(); }
 
    void updateImageLimits( const VECTOR2D& aPoint );
 
    virtual void SetImporter( GRAPHICS_IMPORTER* aImporter ) override;

    void ImportAsFootprintGraphic( bool aImportAsFootprintGraphic )
    {
        m_importAsFPShapes = aImportAsFootprintGraphic;
    }

    void SetUnit( DXF_IMPORT_UNITS aUnit )
    {
        m_currentUnit = aUnit;
    }

    void SetDefaultLineWidthMM( double aWidth )
    {
        m_defaultThickness = aWidth;
    }
 
    void SetLineWidthMM( double aWidth ) override { SetDefaultLineWidthMM( aWidth ); }

    void SetOffset( double aOffsetX, double aOffsetY )
    {
        m_xOffset = aOffsetX;
        m_yOffset = aOffsetY;
    }

    void SetBrdLayer( int aBrdLayer ) { m_brdLayer = aBrdLayer; }

    bool ImportDxfFile( const wxString& aFile );

    bool ImportDxfFile( const wxMemoryBuffer& aMemBuffer );

    const wxString& GetMessages() const override
    {
        return m_messages;
    }
    // report message to keep trace of not supported dxf entities:
    void ReportMsg( const wxString& aMessage ) override;
 
private:
 
    // coordinate conversions from dxf file to mm
    double mapX( double aDxfCoordX );
    double mapY( double aDxfCoordY );
    double mapDim( double aDxfValue );
    double lineWeightToWidth( int lw, DXF_IMPORT_LAYER* aLayer );
    double getCurrentUnitScale();
    wxString getDxfLayerName( const std::string& aLayerName ) const;
 
    MATRIX3x3D getArbitraryAxis( DL_Extrusion* aData );

    VECTOR3D wcsToOcs( const MATRIX3x3D& arbitraryAxis, VECTOR3D point );

    VECTOR3D ocsToWcs( const MATRIX3x3D& arbitraryAxis, VECTOR3D point );

    DXF_IMPORT_LAYER* getImportLayer( const std::string& aLayerName );

    DXF_IMPORT_BLOCK* getImportBlock( const std::string& aBlockName );

    DXF_IMPORT_STYLE* getImportStyle( const std::string& aStyleName );
 
    // Functions to aid in the creation of a Polyline.
    void insertLine( const VECTOR2D& aSegStart, const VECTOR2D& aSegEnd, double aWidth );
    void insertArc( const VECTOR2D& aSegStart, const VECTOR2D& aSegEnd,
                    double aBulge, double aWidth );
 
    // Add a dxf spline (stored in m_curr_entity) to the board, after conversion to segments.
    void insertSpline( double aWidth );
 
    // Methods from DL_CreationAdapter:
    // They are something like"call back" functions,
    // called when the corresponding object is read in dxf file

    virtual void setVariableString( const std::string& key, const std::string& value,
                                    int code ) override;

    virtual void setVariableInt( const std::string& key, int value, int code ) override;

    virtual void setVariableDouble( const std::string& key, double value, int code ) override {}
 
    virtual void addLayer( const DL_LayerData& aData ) override;
    virtual void addLine( const DL_LineData& aData ) override;
    virtual void addLinetype( const DL_LinetypeData& data ) override;

    virtual void addBlock( const DL_BlockData& ) override;
    virtual void endBlock() override;
    virtual void addTextStyle( const DL_StyleData& aData ) override;
    virtual void addPoint( const DL_PointData& aData ) override;
 
    virtual void addCircle( const DL_CircleData& aData ) override;
    virtual void addArc( const DL_ArcData& aData ) override;
    void addEllipse( const DL_EllipseData& aData ) override;
    //virtual void addLWPolyline( const DRW_LWPolyline& aData ) override;
    virtual void addText( const DL_TextData& aData ) override;
    virtual void addPolyline( const DL_PolylineData& aData ) override;
 
            /* Inserts blocks where specified by insert data */
    virtual void addInsert( const DL_InsertData& aData ) override;

    virtual void addVertex( const DL_VertexData& aData ) override;
 
    virtual void addMTextChunk( const std::string& text ) override;
    virtual void addMText( const DL_MTextData& aData ) override;
 
    virtual void endEntity() override;

    virtual void addSpline( const DL_SplineData& aData ) override;

    virtual void addControlPoint( const DL_ControlPointData& aData ) override;

    virtual void addFitPoint( const DL_FitPointData& aData ) override;

    virtual void addKnot( const DL_KnotData& aData ) override;
 
    // Not yet handled DXF entities:
    virtual void addXLine( const DL_XLineData& ) override
    {
        ReportMsg( _( "DXF construction lines not currently supported." ) );
    }
 
    virtual void addRay( const DL_RayData& ) override
    {
        ReportMsg( _( "DXF construction lines not currently supported." ) );
    }
 
    virtual void addArcAlignedText( const DL_ArcAlignedTextData& ) override
    {
        ReportMsg( _( "DXF arc-aligned text not currently supported." ) );
    }
 
    virtual void addDimAlign( const DL_DimensionData&, const DL_DimAlignedData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimLinear( const DL_DimensionData&, const DL_DimLinearData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimRadial( const DL_DimensionData&, const DL_DimRadialData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimDiametric( const DL_DimensionData&, const DL_DimDiametricData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimAngular( const DL_DimensionData&, const DL_DimAngular2LData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimAngular3P( const DL_DimensionData&, const DL_DimAngular3PData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addDimOrdinate( const DL_DimensionData&, const DL_DimOrdinateData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
 
    virtual void addLeader( const DL_LeaderData& ) override
    {
        ReportMsg( _( "DXF dimensions not currently supported." ) );
    }
    virtual void addLeaderVertex( const DL_LeaderVertexData& ) override { }
 
    virtual void addHatch( const DL_HatchData& ) override
    {
        ReportMsg( _( "DXF hatches not currently supported." ) );
    }
 
    virtual void addHatchLoop( const DL_HatchLoopData& ) override { }
    virtual void addHatchEdge( const DL_HatchEdgeData& ) override { }
 
    virtual void addTrace( const DL_TraceData& ) override
    {
        ReportMsg( _( "DXF traces not currently supported." ) );
    }
 
    virtual void add3dFace( const DL_3dFaceData& ) override
    {
        ReportMsg( _( "DXF 3dfaces not currently supported." ) );
    }
 
    virtual void addSolid( const DL_SolidData& ) override
    {
        ReportMsg( _( "DXF solids not currently supported." ) );
    }
 
    virtual void addImage( const DL_ImageData& ) override
    {
        ReportMsg( _( "DXF images not currently supported." ) );
    }
    virtual void linkImage( const DL_ImageDefData& ) override {}
 
    // Eat these silently
    virtual void addAttribute( const DL_AttributeData& ) override { }
    virtual void addXRecord( const std::string& ) override { }
    virtual void addXRecordString( int, const std::string& ) override { }
    virtual void addXRecordReal( int, double ) override { }
    virtual void addXRecordInt( int, int ) override { }
    virtual void addXRecordBool( int, bool ) override { }
    virtual void addXDataApp( const std::string& ) override { }
    virtual void addXDataString( int, const std::string& ) override { }
    virtual void addXDataReal( int, double ) override { }
    virtual void addXDataInt( int, int ) override { }

    static wxString toDxfString( const wxString& aStr );

    static wxString toNativeString( const wxString& aData );
 
    void writeLine();
    void writeMtext();
 
private:
    double      m_xOffset;           // X coord offset for conversion (in mm)
    double      m_yOffset;           // Y coord offset for conversion (in mm)
    double      m_defaultThickness;  // default line thickness for conversion (in mm)
    int         m_brdLayer;          // The board layer to place imported DXF items
    int         m_version;           // the dxf version, not used here
    std::string m_codePage;          // The code page, not used here
    bool        m_importAsFPShapes;  // Use footprint items instead of board items when true.
                                     // true when the items are imported in the footprint editor
    wxString    m_messages;          // messages generated during dxf file parsing.
                                     // Each message ends by '\n'
    DXF2BRD_ENTITY_DATA m_curr_entity;  // the current entity parameters when parsing a DXF entity
 
    std::string m_mtextContent;      // Contents of MText.
 
    double      m_minX, m_maxX;      // handles image size in mm
    double      m_minY, m_maxY;      // handles image size in mm
 
    DXF_IMPORT_UNITS m_currentUnit;               // current unit during import
    int              m_importCoordinatePrecision; // current precision for linear units (points)
    int              m_importAnglePrecision;      // current precision for angles
 
    GRAPHICS_IMPORTER_BUFFER m_internalImporter;
 
    // List of layers as we import, used just to grab props for objects.
    std::vector<std::unique_ptr<DXF_IMPORT_LAYER>> m_layers;
    std::vector<std::unique_ptr<DXF_IMPORT_BLOCK>> m_blocks;    // List of blocks as we import
    std::vector<std::unique_ptr<DXF_IMPORT_STYLE>> m_styles;    // List of blocks as we import
    DXF_IMPORT_BLOCK* m_currentBlock;
};
 
#endif  // DXF2BRD_ITEMS_H