src/utility/comparators.cpp

   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 #include <locale>
  22 #include "comparators.h"
  23 #include "utility/string.h"
  24
  25 namespace {//
  26
  27 bool hasTheWord(const std::string &s)
  28 {
  29         return s.length() >= 4
  30         &&     (s[0] == 't' || s[0] == 'T')
  31         &&     (s[1] == 'h' || s[1] == 'H')
  32         &&     (s[2] == 'e' || s[2] == 'E')
  33         &&     (s[3] == ' ');
  34 }
  35
  36 }
  37
  38 int LocaleStringComparison::operator()(const std::string &a, const std::string &b) const
  39 {
  40         const char *ac = a.c_str();
  41         const char *bc = b.c_str();
  42         size_t ac_off = 0, bc_off = 0;
  43         if (m_ignore_the)
  44         {
  45                 if (hasTheWord(a))
  46                         ac_off += 4;
  47                 if (hasTheWord(b))
  48                         bc_off += 4;
  49         }
  50         return std::use_facet<std::collate<char>>(m_locale).compare(
  51                 ac+ac_off, ac+a.length(), bc+bc_off, bc+b.length()
  52         );
  53 }
  54
  55 bool LocaleBasedItemSorting::operator()(const MPD::Item &a, const MPD::Item &b) const
  56 {
  57         bool result = false;
  58         if (a.type == b.type)
  59         {
  60                 switch (a.type)
  61                 {
  62                         case MPD::itDirectory:
  63                                 result = m_cmp(getBasename(a.name), getBasename(b.name));
  64                                 break;
  65                         case MPD::itPlaylist:
  66                                 result = m_cmp(a.name, b.name);
  67                                 break;
  68                         case MPD::itSong:
  69                                 switch (m_sort_mode)
  70                                 {
  71                                         case SortMode::Name:
  72                                                 result = m_cmp(*a.song, *b.song);
  73                                                 break;
  74                                         case SortMode::ModificationTime:
  75                                                 result = a.song->getMTime() > b.song->getMTime();
  76                                                 break;
  77                                         case SortMode::CustomFormat:
  78                                                 result = m_cmp(a.song->toString(Config.browser_sort_format, Config.tags_separator),
  79                                                                b.song->toString(Config.browser_sort_format, Config.tags_separator));
  80                                                 break;
  81                                         case SortMode::NoOp:
  82                                                 throw std::logic_error("can't sort with NoOp sorting mode");
  83                                 }
  84                                 break;
  85                 }
  86         }
  87         else
  88                 result = a.type < b.type;
  89         return result;
  90 }