object.hpp

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#ifndef GENESIS_UTILS_FORMATS_SVG_OBJECT_H_
#define GENESIS_UTILS_FORMATS_SVG_OBJECT_H_
 
/*
    Genesis - A toolkit for working with phylogenetic data.
    Copyright (C) 2014-2021 Lucas Czech
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
    Contact:
    Lucas Czech <lczech@carnegiescience.edu>
    Department of Plant Biology, Carnegie Institution For Science
    260 Panama Street, Stanford, CA 94305, USA
*/
 
#include "genesis/utils/formats/svg/helper.hpp"
#include "genesis/utils/core/std.hpp"
 
#include <iosfwd>
 
namespace genesis {
namespace utils {
 
// =================================================================================================
//     Svg Object
// =================================================================================================
 
class SvgObject
{
public:
 
    // -------------------------------------------------------------
    //     Typedefs and Enums
    // -------------------------------------------------------------
 
    using self_type = SvgObject;
 
    // -------------------------------------------------------------
    //     Constructors and Rule of Five
    // -------------------------------------------------------------
 
    template< typename T >
    SvgObject( T const& object )
        // Although we are in untils namespace here, we specify the namespace full,
        // in order to avoid ambiguous overload when compiled with C++17.
        : pimpl_( genesis::utils::make_unique< Model<T> >( object ))
    {}
 
    SvgObject( SvgObject const& other )
        : pimpl_( other.pimpl_->clone() )
    {}
 
    SvgObject( SvgObject&& )      = default;
 
    SvgObject& operator=( SvgObject other )
    {
        std::swap( pimpl_, other.pimpl_ );
        return *this;
    }
 
    // SvgObject& operator= ( SvgObject const& ) = default;
    // SvgObject& operator= ( SvgObject&& )      = default;
 
    ~SvgObject() = default;
 
    // -------------------------------------------------------------
    //     Members
    // -------------------------------------------------------------
 
    SvgBox bounding_box() const
    {
        return pimpl_->bounding_box_();
    }
 
    void write(
        std::ostream& out,
        size_t indent = 0,
        SvgDrawingOptions const& options = SvgDrawingOptions()
    ) const {
        pimpl_->write_( out, indent, options );
    }
 
    // -------------------------------------------------------------
    //     Internal Members
    // -------------------------------------------------------------
 
private:
 
    struct Concept
    {
        virtual ~Concept() {}
 
        virtual SvgBox bounding_box_() const = 0;
 
        virtual void write_(
            std::ostream& out,
            size_t indent = 0,
            SvgDrawingOptions const& options = SvgDrawingOptions()
        ) const = 0;
 
        virtual std::unique_ptr< Concept > clone() const = 0;
    };
 
    template< typename T >
    struct Model : Concept
    {
        Model( T const& value )
            : object_( value )
        {}
 
        SvgBox bounding_box_() const override
        {
            return object_.bounding_box();
        }
 
        void write_(
            std::ostream& out,
            size_t indent = 0,
            SvgDrawingOptions const& options = SvgDrawingOptions()
        ) const override {
            object_.write( out, indent, options );
        }
 
        std::unique_ptr< Concept > clone() const override
        {
            // Although we are in untils namespace here, we specify the namespace full,
            // in order to avoid ambiguous overload when compiled with C++17.
            return genesis::utils::make_unique< Model<T> >( object_ );
        }
 
        T object_;
    };
 
    std::unique_ptr< Concept > pimpl_;
 
};
 
} // namespace utils
} // namespace genesis
 
#endif // include guard