src/ncmpcpp.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 <cerrno>
  22 #include <clocale>
  23 #include <csignal>
  24 #include <cstring>
  25
  26 #include <boost/date_time/posix_time/posix_time.hpp>
  27 #include <boost/locale.hpp>
  28 #include <iostream>
  29 #include <fstream>
  30 #include <stdexcept>
  31
  32 #include "mpdpp.h"
  33
  34 #include "actions.h"
  35 #include "bindings.h"
  36 #include "browser.h"
  37 #include "charset.h"
  38 #include "configuration.h"
  39 #include "global.h"
  40 #include "helpers.h"
  41 #include "lyrics.h"
  42 #include "outputs.h"
  43 #include "playlist.h"
  44 #include "settings.h"
  45 #include "status.h"
  46 #include "statusbar.h"
  47 #include "visualizer.h"
  48 #include "title.h"
  49 #include "utility/conversion.h"
  50
  51 namespace
  52 {
  53         std::ofstream errorlog;
  54         std::streambuf *cerr_buffer;
  55         bool run_resize_screen = false;
  56
  57         void sighandler(int sig)
  58         {
  59                 if (sig == SIGWINCH)
  60                 {
  61                         run_resize_screen = true;
  62                 }
  63 #               if defined(__sun) && defined(__SVR4)
  64                 // in solaris it is needed to reinstall the handler each time it's executed
  65                 signal(sig, sighandler);
  66 #               endif // __sun && __SVR4
  67         }
  68
  69         void do_at_exit()
  70         {
  71                 // restore old cerr buffer
  72                 std::cerr.rdbuf(cerr_buffer);
  73                 errorlog.close();
  74                 Mpd.Disconnect();
  75                 NC::destroyScreen();
  76                 windowTitle("");
  77         }
  78 }
  79
  80 int main(int argc, char **argv)
  81 {
  82         using Global::myScreen;
  83
  84         using Global::wHeader;
  85         using Global::wFooter;
  86
  87         using Global::VolumeState;
  88         using Global::Timer;
  89
  90         srand(time(nullptr));
  91         std::setlocale(LC_ALL, "");
  92         std::locale::global(Charset::internalLocale());
  93
  94         if (!configure(argc, argv))
  95                 return 0;
  96
  97         // always execute these commands, even if ncmpcpp use exit function
  98         atexit(do_at_exit);
  99
 100         // redirect std::cerr output to ~/.ncmpcpp/error.log file
 101         errorlog.open((Config.ncmpcpp_directory + "error.log").c_str(), std::ios::app);
 102         cerr_buffer = std::cerr.rdbuf();
 103         std::cerr.rdbuf(errorlog.rdbuf());
 104
 105 #       ifndef WIN32
 106         signal(SIGPIPE, sighandler);
 107         signal(SIGWINCH, sighandler);
 108         // ignore Ctrl-C
 109         sigignore(SIGINT);
 110 #       endif // !WIN32
 111
 112         NC::initScreen(Config.colors_enabled, Config.mouse_support);
 113
 114         Actions::OriginalStatusbarVisibility = Config.statusbar_visibility;
 115
 116         if (Config.design == Design::Alternative)
 117                 Config.statusbar_visibility = 0;
 118
 119         Actions::setWindowsDimensions();
 120         Actions::validateScreenSize();
 121         Actions::initializeScreens();
 122
 123         wHeader = new NC::Window(0, 0, COLS, Actions::HeaderHeight, "", Config.header_color, NC::Border());
 124         if (Config.header_visibility || Config.design == Design::Alternative)
 125                 wHeader->display();
 126
 127         wFooter = new NC::Window(0, Actions::FooterStartY, COLS, Actions::FooterHeight, "", Config.statusbar_color, NC::Border());
 128         wFooter->setPromptHook(Statusbar::Helpers::mainHook);
 129
 130         // initialize global timer
 131         Timer = boost::posix_time::microsec_clock::local_time();
 132
 133         // initialize playlist
 134         myPlaylist->switchTo();
 135
 136         // go to startup screen
 137         if (Config.startup_screen_type != myScreen->type())
 138                 toScreen(Config.startup_screen_type)->switchTo();
 139
 140         // lock current screen and go to the slave one if applicable
 141         if (Config.startup_slave_screen_type)
 142         {
 143                 auto slave_screen = *Config.startup_slave_screen_type;
 144                 bool screen_locked = myScreen->lock();
 145                 if (screen_locked && slave_screen != myScreen->type())
 146                         toScreen(slave_screen)->switchTo();
 147         }
 148
 149         // local variables
 150         bool key_pressed = false;
 151         Key input = Key::noOp;
 152         auto connect_attempt = boost::posix_time::from_time_t(0);
 153         auto past = boost::posix_time::from_time_t(0);
 154
 155         while (!Actions::ExitMainLoop)
 156         {
 157                 try
 158                 {
 159                         if (!Mpd.Connected() && Timer - connect_attempt > boost::posix_time::seconds(1))
 160                         {
 161                                 connect_attempt = Timer;
 162                                 // reset local status info
 163                                 Status::clear();
 164                                 // clear mpd callback
 165                                 wFooter->clearFDCallbacksList();
 166                                 try
 167                                 {
 168                                         Mpd.Connect();
 169                                         if (Mpd.Version() < 16)
 170                                         {
 171                                                         Mpd.Disconnect();
 172                                                         throw MPD::ClientError(MPD_ERROR_STATE, "MPD < 0.16.0 is not supported", false);
 173                                         }
 174                                 }
 175                                 catch (MPD::ClientError &e)
 176                                 {
 177                                         Status::handleClientError(e);
 178                                 }
 179                         }
 180
 181                         // update timer, status if necessary etc.
 182                         Status::trace(!key_pressed, true);
 183
 184                         if (run_resize_screen)
 185                         {
 186                                 Actions::resizeScreen(true);
 187                                 run_resize_screen = false;
 188                         }
 189
 190                         // header stuff
 191                         if ((myScreen == myPlaylist || myScreen == myBrowser || myScreen == myLyrics)
 192                         &&  (Timer - past > boost::posix_time::milliseconds(500))
 193                         )
 194                         {
 195                                 drawHeader();
 196                                 past = Timer;
 197                         }
 198
 199                         if (key_pressed)
 200                                 myScreen->refreshWindow();
 201                         input = Key::read(*wFooter);
 202                         key_pressed = input != Key::noOp;
 203
 204                         if (!key_pressed)
 205                                 continue;
 206
 207                         // The reason we want to update timer here is that if the timer is updated
 208                         // in Status::trace, then Key::read usually blocks for 500ms and if key is
 209                         // pressed 400ms after Key::read was called, we end up with Timer that is
 210                         // ~400ms inaccurate. On the other hand, if keys are being pressed, we don't
 211                         // want to update timer in both Status::trace and here. Therefore we update
 212                         // timer in Status::trace only if there was no recent input.
 213                         Timer = boost::posix_time::microsec_clock::local_time();
 214
 215                         try
 216                         {
 217                                 auto k = Bindings.get(input);
 218                                 std::any_of(k.first, k.second, boost::bind(&Binding::execute, _1));
 219                         }
 220                         catch (ConversionError &e)
 221                         {
 222                                 Statusbar::printf("Invalid value: %1%", e.value());
 223                         }
 224                         catch (OutOfBounds &e)
 225                         {
 226                                 Statusbar::printf("Error: %1%", e.errorMessage());
 227                         }
 228                         catch (NC::PromptAborted &)
 229                         {
 230                                 Statusbar::printf("Action aborted");
 231                         }
 232
 233                         if (myScreen == myPlaylist)
 234                                 myPlaylist->EnableHighlighting();
 235                 }
 236                 catch (MPD::ClientError &e)
 237                 {
 238                         Status::handleClientError(e);
 239                 }
 240                 catch (MPD::ServerError &e)
 241                 {
 242                         Status::handleServerError(e);
 243                 }
 244                 catch (std::exception &e)
 245                 {
 246                         Statusbar::printf("Unexpected error: %1%", e.what());
 247                 }
 248         }
 249         return 0;
 250 }