src/lyrics.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_LYRICS_H
  22 #define NCMPCPP_LYRICS_H
  23
  24 #include <boost/optional.hpp>
  25 #include <future>
  26 #include <memory>
  27 #include <queue>
  28
  29 #include "interfaces.h"
  30 #include "lyrics_fetcher.h"
  31 #include "screen.h"
  32 #include "song.h"
  33 #include "utility/shared_resource.h"
  34
  35 struct Lyrics: Screen<NC::Scrollpad>, Tabbable
  36 {
  37         Lyrics();
  38
  39         // Screen<NC::Scrollpad> implementation
  40         virtual void resize() override;
  41         virtual void switchTo() override;
  42
  43         virtual std::wstring title() override;
  44         virtual ScreenType type() override { return ScreenType::Lyrics; }
  45
  46         virtual void update() override;
  47
  48         virtual bool isLockable() override { return false; }
  49         virtual bool isMergable() override { return true; }
  50
  51         // other members
  52         void fetch(const MPD::Song &s);
  53         void refetchCurrent();
  54         void edit();
  55         void toggleFetcher();
  56
  57         void fetchInBackground(const MPD::Song &s, bool notify_);
  58         boost::optional<std::string> tryTakeConsumerMessage();
  59
  60 private:
  61         struct ConsumerState
  62         {
  63                 struct Song
  64                 {
  65                         Song()
  66                                 : m_notify(false)
  67                         { }
  68
  69                         Song(const MPD::Song &s, bool notify_)
  70                                 : m_song(s), m_notify(notify_)
  71                         { }
  72
  73                         const MPD::Song &song() const { return m_song; }
  74                         bool notify() const { return m_notify; }
  75
  76                 private:
  77                         MPD::Song m_song;
  78                         bool m_notify;
  79                 };
  80
  81                 ConsumerState()
  82                         : running(false)
  83                 { }
  84
  85                 bool running;
  86                 std::queue<Song> songs;
  87                 boost::optional<std::string> message;
  88         };
  89
  90         void clearWorker();
  91
  92         bool m_refresh_window;
  93         size_t m_scroll_begin;
  94
  95         std::shared_ptr<Shared<NC::Buffer>> m_shared_buffer;
  96
  97         MPD::Song m_song;
  98         LyricsFetcher *m_fetcher;
  99         std::future<boost::optional<std::string>> m_worker;
 100
 101         Shared<ConsumerState> m_consumer_state;
 102 };
 103
 104 extern Lyrics *myLyrics;
 105
 106 #endif // NCMPCPP_LYRICS_H