kicad/libs/kimath/include/geometry/shape_compound.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2016-2020 CERN
 * Copyright (C) 2021-2022 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 __SHAPE_COMPOUND_H
#define __SHAPE_COMPOUND_H

#include <geometry/shape.h>
#include <math/vector2d.h>
#include <math/box2.h>
#include <list>
#include <vector>
#include <memory>
#include "eda_angle.h"

class SHAPE_SIMPLE;

class SHAPE_COMPOUND : public SHAPE
{
public:
    SHAPE_COMPOUND() :
            SHAPE( SH_COMPOUND ),
            m_dirty( true )
    {
    }


    SHAPE_COMPOUND( const std::vector<SHAPE*>& aShapes );

    SHAPE_COMPOUND( const SHAPE_COMPOUND& aOther );
    ~SHAPE_COMPOUND();

    SHAPE_COMPOUND*   Clone() const override;
    const std::string Format() const override;

    bool Collide( const SEG& aSeg, int aClearance = 0, int* aActual = nullptr,
                  VECTOR2I* aLocation = nullptr ) const override;

    bool Collide( const SHAPE* aShape, int aClearance, VECTOR2I* aMTV ) const override
    {
        return SHAPE::Collide( aShape, aClearance, aMTV );
    }

    bool Collide( const SHAPE* aShape, int aClearance = 0, int* aActual = nullptr,
                  VECTOR2I* aLocation = nullptr ) const override
    {
        return SHAPE::Collide( aShape, aClearance, aActual, aLocation );
    }

    const std::vector<SHAPE*>& Shapes() const
    {
        return m_shapes;
    }

    const BOX2I BBox( int aClearance = 0 ) const override;

    int Distance( const SEG& aSeg ) const;

    void Move( const VECTOR2I& aVector ) override;

    void AddShape( SHAPE* aShape )
    {
        // Don't make clients deal with nested SHAPE_COMPOUNDs
        if( aShape->HasIndexableSubshapes() )
        {
            std::vector<const SHAPE*> subshapes;
            aShape->GetIndexableSubshapes( subshapes );

            for( const SHAPE* subshape : subshapes )
                m_shapes.push_back( subshape->Clone() );

            delete aShape;
        }
        else
        {
            m_shapes.push_back( aShape );
        }

        m_dirty = true;
    }

    void AddShape( std::shared_ptr<SHAPE> aShape )
    {
        // Don't make clients deal with nested SHAPE_COMPOUNDs
        if( aShape->HasIndexableSubshapes() )
        {
            std::vector<const SHAPE*> subshapes;
            aShape->GetIndexableSubshapes( subshapes );

            for( const SHAPE* subshape : subshapes )
                m_shapes.push_back( subshape->Clone() );
        }
        else
        {
            m_shapes.push_back( aShape->Clone() );
        }

        m_dirty = true;
    }

    bool Empty() const
    {
        return m_shapes.empty();
    }

    int Size() const
    {
        return m_shapes.size();
    }

    void Rotate( const EDA_ANGLE& aAngle, const VECTOR2I& aCenter = { 0, 0 } ) override;

    bool IsSolid() const override;

    SHAPE* UniqueSubshape() const
    {
        return m_shapes.size() != 1 ? nullptr : m_shapes[0];
    }

    virtual bool HasIndexableSubshapes() const override
    {
        return true;
    }

    virtual size_t GetIndexableSubshapeCount() const override
    {
        return m_shapes.size();
    }

    virtual void GetIndexableSubshapes( std::vector<const SHAPE*>& aSubshapes ) const override
    {
        aSubshapes.clear();
        aSubshapes.reserve( m_shapes.size() );
        std::copy( m_shapes.begin(), m_shapes.end(), std::back_inserter( aSubshapes ) );
    }

    bool ConvertToSimplePolygon( SHAPE_SIMPLE* aOut ) const;

private:
    BOX2I               m_cachedBBox;
    bool                m_dirty;
    std::vector<SHAPE*> m_shapes;
};

#endif // __SHAPE_COMPOUND_H