newick/color_writer_plugin.hpp

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#ifndef GENESIS_TREE_FORMATS_NEWICK_COLOR_WRITER_PLUGIN_H_
#define GENESIS_TREE_FORMATS_NEWICK_COLOR_WRITER_PLUGIN_H_
 
/*
    Genesis - A toolkit for working with phylogenetic data.
    Copyright (C) 2014-2020 Lucas Czech and HITS gGmbH
 
    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 <lucas.czech@h-its.org>
    Exelixis Lab, Heidelberg Institute for Theoretical Studies
    Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany
*/
 
#include "genesis/tree/tree.hpp"
#include "genesis/tree/formats/color_writer_plugin.hpp"
#include "genesis/tree/formats/newick/element.hpp"
#include "genesis/tree/formats/newick/writer.hpp"
 
#include <cassert>
#include <stdexcept>
#include <string>
 
namespace genesis {
namespace tree {
 
// =================================================================================================
//     Newick Color Writer Plugin
// =================================================================================================
 
class NewickColorWriterPlugin : public ColorWriterPlugin
{
public:
 
    // -------------------------------------------------------------------------
    //     Constructor and Rule of Five
    // -------------------------------------------------------------------------
 
    NewickColorWriterPlugin() = default;
    virtual ~NewickColorWriterPlugin() = default;
 
    NewickColorWriterPlugin(NewickColorWriterPlugin const&) = default;
    NewickColorWriterPlugin(NewickColorWriterPlugin&&)      = default;
 
    NewickColorWriterPlugin& operator= (NewickColorWriterPlugin const&) = default;
    NewickColorWriterPlugin& operator= (NewickColorWriterPlugin&&)      = default;
 
    // -------------------------------------------------------------------------
    //     Properties
    // -------------------------------------------------------------------------
 
    void color_tag_prefix( std::string const& prefix )
    {
        color_tag_prefix_ = prefix;
    }
 
    std::string color_tag_prefix() const
    {
        return color_tag_prefix_;
    }
 
    void color_tag_suffix( std::string const& suffix )
    {
        color_tag_suffix_ = suffix;
    }
 
    std::string color_tag_suffix() const
    {
        return color_tag_suffix_;
    }
 
    // -------------------------------------------------------------------------
    //     Plugin Functions
    // -------------------------------------------------------------------------
 
    void prepare_writing( Tree const& tree, NewickBroker& broker ) const
    {
        (void) broker;
 
        if (!ColorWriterPlugin::enable_color()) {
            return;
        }
 
        // If an edge color vector was set, it needs to match the tree's edge count.
        if (
            ColorWriterPlugin::edge_colors().size() > 0 &&
            ColorWriterPlugin::edge_colors().size() != tree.edge_count()
        ) {
            throw std::length_error(
                "Color vector does not have as many elements as the tree has edges."
            );
        }
    }
 
    void edge_to_element( TreeEdge const& edge, NewickBrokerElement& element ) const
    {
        if (!ColorWriterPlugin::enable_color()) {
            return;
        }
 
        // If an edge color vector was set, use it.
        if (ColorWriterPlugin::edge_colors().size() > 0) {
            assert( edge.index() <= ColorWriterPlugin::edge_colors().size() );
            set_color_(element, ColorWriterPlugin::edge_colors()[edge.index()]);
        }
    }
 
    void register_with( NewickWriter& writer ) const
    {
        writer.prepare_writing_plugins.push_back(
            [&]( Tree const& tree, NewickBroker& broker ) {
                prepare_writing( tree, broker );
            }
        );
        writer.edge_to_element_plugins.push_back(
            [&]( TreeEdge const& edge, NewickBrokerElement& element ) {
                edge_to_element( edge, element );
            }
        );
    }
 
    // -------------------------------------------------------------------------
    //     Member Functions
    // -------------------------------------------------------------------------
 
private:
 
    void set_color_( NewickBrokerElement& element, unsigned char r, unsigned char g, unsigned char b ) const
    {
        set_color_( element, utils::Color(r, g, b) );
    }
 
    void set_color_( NewickBrokerElement& element, utils::Color color ) const
    {
        if(
            ColorWriterPlugin::use_ignored_color() &&
            color == ColorWriterPlugin::ignored_color()
        ) {
            return;
        }
 
        // TODO do not create new element if there is already one!
        // TODO add functor for converting color to string. maybe not all want hex format...
        element.comments.push_back(
            color_tag_prefix_ + utils::color_to_hex(color) + color_tag_suffix_
        );
    }
 
    // -------------------------------------------------------------------------
    //     Data Members
    // -------------------------------------------------------------------------
 
private:
 
    std::string color_tag_prefix_ = "&!color=";
    std::string color_tag_suffix_ = "";
 
};
 
} // namespace tree
} // namespace genesis
 
#endif // include guard