src/search_engine.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_SEARCH_ENGINE_H
  22 #define NCMPCPP_SEARCH_ENGINE_H
  23
  24 #include <cassert>
  25
  26 #include "interfaces.h"
  27 #include "mpdpp.h"
  28 #include "screen.h"
  29
  30 struct SearchEngine: Screen<NC::Menu<struct SEItem>>, Filterable, HasSongs, Searchable, Tabbable
  31 {
  32         SearchEngine();
  33
  34         // Screen< NC::Menu<SEItem> > implementation
  35         virtual void resize() OVERRIDE;
  36         virtual void switchTo() OVERRIDE;
  37
  38         virtual std::wstring title() OVERRIDE;
  39         virtual ScreenType type() OVERRIDE { return ScreenType::SearchEngine; }
  40
  41         virtual void update() OVERRIDE { }
  42
  43         virtual void enterPressed() OVERRIDE;
  44         virtual void spacePressed() OVERRIDE;
  45         virtual void mouseButtonPressed(MEVENT me) OVERRIDE;
  46
  47         virtual bool isMergable() OVERRIDE { return true; }
  48
  49         // Filterable implementation
  50         virtual bool allowsFiltering() OVERRIDE;
  51         virtual std::string currentFilter() OVERRIDE;
  52         virtual void applyFilter(const std::string &filter) OVERRIDE;
  53
  54         // Searchable implementation
  55         virtual bool allowsSearching() OVERRIDE;
  56         virtual bool search(const std::string &constraint) OVERRIDE;
  57         virtual void nextFound(bool wrap) OVERRIDE;
  58         virtual void prevFound(bool wrap) OVERRIDE;
  59
  60         // HasSongs implementation
  61         virtual ProxySongList proxySongList() OVERRIDE;
  62
  63         virtual bool allowsSelection() OVERRIDE;
  64         virtual void reverseSelection() OVERRIDE;
  65         virtual MPD::SongList getSelectedSongs() OVERRIDE;
  66
  67         // private members
  68         void reset();
  69
  70         static size_t StaticOptions;
  71         static size_t SearchButton;
  72         static size_t ResetButton;
  73
  74 protected:
  75         virtual bool isLockable() OVERRIDE { return true; }
  76
  77 private:
  78         void Prepare();
  79         void Search();
  80
  81         const char **SearchMode;
  82
  83         static const char *SearchModes[];
  84
  85         static const size_t ConstraintsNumber = 11;
  86         static const char *ConstraintsNames[];
  87         std::string itsConstraints[ConstraintsNumber];
  88
  89         static bool MatchToPattern;
  90 };
  91
  92 struct SEItem
  93 {
  94         SEItem() : m_is_song(false), m_buffer(0) { }
  95         SEItem(NC::Buffer *buf) : m_is_song(false), m_buffer(buf) { }
  96         SEItem(const MPD::Song &s) : m_is_song(true), m_song(s) { }
  97         SEItem(const SEItem &ei) { *this = ei; }
  98         ~SEItem() {
  99                 if (!m_is_song)
 100                         delete m_buffer;
 101         }
 102
 103         NC::Buffer &mkBuffer() {
 104                 assert(!m_is_song);
 105                 delete m_buffer;
 106                 m_buffer = new NC::Buffer();
 107                 return *m_buffer;
 108         }
 109
 110         bool isSong() const { return m_is_song; }
 111
 112         NC::Buffer &buffer() { assert(!m_is_song && m_buffer); return *m_buffer; }
 113         MPD::Song &song() { assert(m_is_song); return m_song; }
 114
 115         const NC::Buffer &buffer() const { assert(!m_is_song && m_buffer); return *m_buffer; }
 116         const MPD::Song &song() const { assert(m_is_song); return m_song; }
 117
 118         SEItem &operator=(const SEItem &se) {
 119                 if (this == &se)
 120                         return *this;
 121                 m_is_song = se.m_is_song;
 122                 if (se.m_is_song)
 123                         m_song = se.m_song;
 124                 else if (se.m_buffer)
 125                         m_buffer = new NC::Buffer(*se.m_buffer);
 126                 else
 127                         m_buffer = 0;
 128                 return *this;
 129         }
 130
 131 private:
 132         bool m_is_song;
 133
 134         NC::Buffer *m_buffer;
 135         MPD::Song m_song;
 136 };
 137
 138 extern SearchEngine *mySearcher;
 139
 140 #endif // NCMPCPP_SEARCH_ENGINE_H
 141