src/utility/comparators.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2016 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_UTILITY_COMPARATORS_H
  22 #define NCMPCPP_UTILITY_COMPARATORS_H
  23
  24 #include <string>
  25 #include "runnable_item.h"
  26 #include "mpdpp.h"
  27 #include "settings.h"
  28 #include "menu.h"
  29
  30 class LocaleStringComparison
  31 {
  32         std::locale m_locale;
  33         bool m_ignore_the;
  34
  35 public:
  36         LocaleStringComparison(const std::locale &loc, bool ignore_the)
  37         : m_locale(loc), m_ignore_the(ignore_the) { }
  38
  39         int operator()(const char *a, const char *b) const {
  40                 return compare(a, strlen(a), b, strlen(b));
  41         }
  42         int operator()(const std::string &a, const std::string &b) const {
  43                 return compare(a.c_str(), a.length(), b.c_str(), b.length());
  44         }
  45
  46         int compare(const char *a, size_t a_len, const char *b, size_t b_len) const;
  47 };
  48
  49 class LocaleBasedSorting
  50 {
  51         LocaleStringComparison m_cmp;
  52
  53 public:
  54         LocaleBasedSorting(const std::locale &loc, bool ignore_the) : m_cmp(loc, ignore_the) { }
  55
  56         bool operator()(const std::string &a, const std::string &b) const {
  57                 return m_cmp(a, b) < 0;
  58         }
  59
  60         bool operator()(const MPD::Playlist &a, const MPD::Playlist &b) const {
  61                 return m_cmp(a.path(), b.path()) < 0;
  62         }
  63
  64         bool operator()(const MPD::Song &a, const MPD::Song &b) const {
  65                 return m_cmp(a.getName(), b.getName()) < 0;
  66         }
  67
  68         template <typename A, typename B>
  69         bool operator()(const std::pair<A, B> &a, const std::pair<A, B> &b) const {
  70                 return m_cmp(a.first, b.first) < 0;
  71         }
  72
  73         template <typename ItemT, typename FunT>
  74         bool operator()(const RunnableItem<ItemT, FunT> &a, const RunnableItem<ItemT, FunT> &b) const {
  75                 return m_cmp(a.item(), b.item()) < 0;
  76         }
  77 };
  78
  79 class LocaleBasedItemSorting
  80 {
  81         LocaleBasedSorting m_cmp;
  82         SortMode m_sort_mode;
  83
  84 public:
  85         LocaleBasedItemSorting(const std::locale &loc, bool ignore_the, SortMode mode)
  86         : m_cmp(loc, ignore_the), m_sort_mode(mode) { }
  87
  88         bool operator()(const MPD::Item &a, const MPD::Item &b) const;
  89
  90         bool operator()(const NC::Menu<MPD::Item>::Item &a, const NC::Menu<MPD::Item>::Item &b) const {
  91                 return (*this)(a.value(), b.value());
  92         }
  93 };
  94
  95 #endif // NCMPCPP_UTILITY_COMPARATORS_H