src/search_engine.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2012 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 _SEARCH_ENGINE_H
  22 #define _SEARCH_ENGINE_H
  23
  24 #include <cassert>
  25
  26 #include "interfaces.h"
  27 #include "mpdpp.h"
  28 #include "screen.h"
  29
  30 struct SEItem
  31 {
  32         SEItem() : isThisSong(false), itsBuffer(0) { }
  33         SEItem(NC::Buffer *buf) : isThisSong(false), itsBuffer(buf) { }
  34         SEItem(const MPD::Song &s) : isThisSong(true), itsSong(s) { }
  35         SEItem(const SEItem &ei) { *this = ei; }
  36         ~SEItem() {
  37                 if (!isThisSong)
  38                         delete itsBuffer;
  39         }
  40
  41         NC::Buffer &mkBuffer() {
  42                 assert(!isThisSong);
  43                 delete itsBuffer;
  44                 itsBuffer = new NC::Buffer();
  45                 return *itsBuffer;
  46         }
  47
  48         bool isSong() const { return isThisSong; }
  49
  50         NC::Buffer &buffer() { assert(!isThisSong && itsBuffer); return *itsBuffer; }
  51         MPD::Song &song() { assert(isThisSong); return itsSong; }
  52
  53         const NC::Buffer &buffer() const { assert(!isThisSong && itsBuffer); return *itsBuffer; }
  54         const MPD::Song &song() const { assert(isThisSong); return itsSong; }
  55
  56         SEItem &operator=(const SEItem &se) {
  57                 if (this == &se)
  58                         return *this;
  59                 isThisSong = se.isThisSong;
  60                 if (se.isThisSong)
  61                         itsSong = se.itsSong;
  62                 else if (se.itsBuffer)
  63                         itsBuffer = new NC::Buffer(*se.itsBuffer);
  64                 else
  65                         itsBuffer = 0;
  66                 return *this;
  67         }
  68
  69         private:
  70                 bool isThisSong;
  71
  72                 NC::Buffer *itsBuffer;
  73                 MPD::Song itsSong;
  74 };
  75
  76 struct SearchEngine : public Screen< NC::Menu<SEItem> >, public Filterable, public HasSongs, public Searchable
  77 {
  78         // Screen< NC::Menu<SEItem> > implementation
  79         virtual void resize() OVERRIDE;
  80         virtual void switchTo() OVERRIDE;
  81
  82         virtual std::wstring title() OVERRIDE;
  83
  84         virtual void update() OVERRIDE { }
  85
  86         virtual void enterPressed() OVERRIDE;
  87         virtual void spacePressed() OVERRIDE;
  88         virtual void mouseButtonPressed(MEVENT me) OVERRIDE;
  89
  90         virtual bool isTabbable() OVERRIDE { return true; }
  91         virtual bool isMergable() OVERRIDE { return true; }
  92
  93         // Filterable implementation
  94         virtual bool allowsFiltering() OVERRIDE;
  95         virtual std::string currentFilter() OVERRIDE;
  96         virtual void applyFilter(const std::string &filter) OVERRIDE;
  97
  98         // Searchable implementation
  99         virtual bool allowsSearching() OVERRIDE;
 100         virtual bool search(const std::string &constraint) OVERRIDE;
 101         virtual void nextFound(bool wrap) OVERRIDE;
 102         virtual void prevFound(bool wrap) OVERRIDE;
 103
 104         // HasSongs implementation
 105         virtual std::shared_ptr<ProxySongList> getProxySongList() OVERRIDE;
 106
 107         virtual bool allowsSelection() OVERRIDE;
 108         virtual void reverseSelection() OVERRIDE;
 109         virtual MPD::SongList getSelectedSongs() OVERRIDE;
 110
 111         // private members
 112
 113         static size_t StaticOptions;
 114         static size_t SearchButton;
 115         static size_t ResetButton;
 116
 117 protected:
 118         virtual void init() OVERRIDE;
 119         virtual bool isLockable() OVERRIDE { return true; }
 120
 121 private:
 122         void Prepare();
 123         void Search();
 124         void reset();
 125
 126         const char **SearchMode;
 127
 128         static const char *SearchModes[];
 129
 130         static const size_t ConstraintsNumber = 11;
 131         static const char *ConstraintsNames[];
 132         std::string itsConstraints[ConstraintsNumber];
 133
 134         static bool MatchToPattern;
 135 };
 136
 137 extern SearchEngine *mySearcher;
 138
 139 #endif
 140