src/regex_filter.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2014 by Andrzej Rybczak                            *
   3  *   electricityispower@gmail.com                                          *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
  19  ***************************************************************************/
  20
  21 #ifndef NCMPCPP_REGEX_FILTER_H
  22 #define NCMPCPP_REGEX_FILTER_H
  23
  24 #include <boost/regex.hpp>
  25 #include "menu.h"
  26
  27 template <typename T> struct RegexFilter
  28 {
  29         typedef NC::Menu<T> MenuT;
  30         typedef typename NC::Menu<T>::Item Item;
  31         typedef std::function<bool(const boost::regex &, const T &)> FilterFunction;
  32
  33         RegexFilter(boost::regex rx, FilterFunction filter)
  34         : m_rx(rx), m_filter(filter) { }
  35
  36         bool operator()(const Item &item) {
  37                 return m_filter(m_rx, item.value());
  38         }
  39
  40         static std::string currentFilter(MenuT &menu)
  41         {
  42                 std::string filter;
  43                 auto rf = menu.getFilter().template target< RegexFilter<T> >();
  44                 if (rf)
  45                         filter = rf->m_rx.str();
  46                 return filter;
  47         }
  48
  49 private:
  50         boost::regex m_rx;
  51         FilterFunction m_filter;
  52 };
  53
  54 template <typename T> struct RegexItemFilter
  55 {
  56         typedef NC::Menu<T> MenuT;
  57         typedef typename NC::Menu<T>::Item Item;
  58         typedef std::function<bool(const boost::regex &, const Item &)> FilterFunction;
  59
  60         RegexItemFilter(boost::regex rx, FilterFunction filter)
  61         : m_rx(rx), m_filter(filter) { }
  62
  63         bool operator()(const Item &item) {
  64                 return m_filter(m_rx, item);
  65         }
  66
  67         static std::string currentFilter(MenuT &menu)
  68         {
  69                 std::string filter;
  70                 auto rf = menu.getFilter().template target< RegexItemFilter<T> >();
  71                 if (rf)
  72                         filter = rf->m_rx.str();
  73                 return filter;
  74         }
  75
  76 private:
  77         boost::regex m_rx;
  78         FilterFunction m_filter;
  79 };
  80
  81 #endif // NCMPCPP_REGEX_FILTER_H