source: trunk/lib/Colors.cc @ 1237

// $Id: Colors.cc 1237 2010-10-23 21:41:40Z peter $

/*
  Copyright (C) 2009 Jari Häkkinen, Peter Johansson

  This file is part of svndigest, http://dev.thep.lu.se/svndigest

  svndigest 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.

  svndigest 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 svndigest. If not, see <http://www.gnu.org/licenses/>.
*/

#include "Colors.h"

#include "Configuration.h"

#include <cstdlib>
#include <ctype.h>
#include <sstream>

namespace theplu {
namespace svndigest {

  Colors* Colors::instance_=NULL;


  Colors::Colors(void)
    : color_map_(13)
  {
    color_map_[ 0].label="green";
    color_map_[ 0].str="009248";
    color_map_[ 1].label="blue";
    color_map_[ 1].str="1b75ba";
    color_map_[ 2].label="red";
    color_map_[ 2].str="bd202e";
    color_map_[ 3].label="grey";
    color_map_[ 3].str="838383";
    color_map_[ 4].label="orange";
    color_map_[ 4].str="f59120";
    color_map_[ 5].label="brown";
    color_map_[ 5].str="754d29";
    color_map_[ 6].label="cyan";
    color_map_[ 6].str="28aae1";
    color_map_[ 7].label="lime";
    color_map_[ 7].str="d5dd26";
    color_map_[ 8].label="purple";
    color_map_[ 8].str="8f288c";
    color_map_[ 9].label="lgrey";
    color_map_[ 9].str="dcdcdc";
    color_map_[10].label="lbrown";
    color_map_[10].str="c2976a";
    color_map_[11].label="pink";
    color_map_[11].str="e67de6";
    color_map_[12].label="black";
    color_map_[12].str="000000";
    // calculate corresponding rgb values
    for (std::vector<color>::iterator col = color_map_.begin(); 
         col!=color_map_.end(); ++col) {
      str2rgb(col->str, col->r, col->g, col->b);
    }

    typedef std::map<std::string, std::string> ACmap;
    const ACmap& authcols=Configuration::instance().author_colors();
    // reserve sufficient size in vector here to avoid reallocation
    // and iterators being invalidated
    color_map_.reserve(color_map_.size()+authcols.size());
    next_color_=color_map_.begin();
    for (ACmap::const_iterator i=authcols.begin(); i!=authcols.end(); i++) {
      color c;
      c.label=i->first;
      str2rgb(i->second, c.r, c.g, c.b);
      c.str = i->second;
      next_color_=color_map_.insert(next_color_,c);
      author_map_.insert(std::make_pair(c.label, next_color_++));
    }
  }


  const std::string& Colors::color_str(const std::string& label)
  {
    return get_color(label).str;
  }


  const Colors::color& Colors::get_color(const std::string& label)
  {
    std::map<std::string,std::vector<color>::iterator>::iterator i;
    i = author_map_.lower_bound(label);
    if (i==author_map_.end() || i->first != label) {
      // no color defined for label, set color for label
      i = author_map_.insert(i, std::make_pair(label, next_color_++));
      if (next_color_==color_map_.end())
        // end of color map reach, start over
        next_color_=color_map_.begin();
    }
    return *(i->second);
  }


  void Colors::get_color(const std::string& label, unsigned char& r,
                           unsigned char& g, unsigned char& b)
  {
    const color& col(get_color(label));
    r = col.r;
    g = col.g;
    b = col.b;
  }


  Colors& Colors::instance(void)
  {
    if (!instance_)
      instance_ = new Colors;
    return *instance_;
  }


  int to_decimal(int hex)
  {
    hex=toupper(hex);
    if (hex>47 && hex<58) // 0--9
      return hex-48;
    if (hex>64 && hex<71) // A--F
      return hex-55;
    std::ostringstream ss;
    ss << static_cast<char>(hex) << " is not hexadecimal";
    throw std::runtime_error(ss.str());
    return -1;
  }

  void str2rgb(const std::string& str, unsigned char& r, unsigned char& g,
               unsigned char& b)
  {
    if (str.size()==6) {
      r = 16*to_decimal(str[0]) + to_decimal(str[1]);
      g = 16*to_decimal(str[2]) + to_decimal(str[3]);
      b = 16*to_decimal(str[4]) + to_decimal(str[5]);
    }
    else if (str.size()==3) {
      r = 17*to_decimal(str[0]);
      g = 17*to_decimal(str[1]);
      b = 17*to_decimal(str[2]);
    }
    else 
      throw std::runtime_error("invalid color format: " + str);
  }


}} // end of namespace svndigest and namespace theplu