src/ncmpcpp.cpp

   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 #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 "screens/browser.h"
  37 #include "charset.h"
  38 #include "configuration.h"
  39 #include "global.h"
  40 #include "helpers.h"
  41 #include "screens/lyrics.h"
  42 #include "screens/outputs.h"
  43 #include "screens/playlist.h"
  44 #include "settings.h"
  45 #include "status.h"
  46 #include "statusbar.h"
  47 #include "screens/visualizer.h"
  48 #include "title.h"
  49 #include "utility/conversion.h"
  50
  51 namespace ph = std::placeholders;
  52
  53 namespace {
  54
  55 std::ofstream errorlog;
  56 std::streambuf *cerr_buffer;
  57
  58 volatile bool run_resize_screen = false;
  59
  60 void sighandler(int sig)
  61 {
  62         if (sig == SIGWINCH)
  63                 run_resize_screen = true;
  64 #if defined(__sun) && defined(__SVR4)
  65         // in solaris it is needed to reinstall the handler each time it's executed
  66         signal(sig, sighandler);
  67 #endif // __sun && __SVR4
  68 }
  69
  70 void do_at_exit()
  71 {
  72         // restore old cerr buffer
  73         std::cerr.rdbuf(cerr_buffer);
  74         errorlog.close();
  75         Mpd.Disconnect();
  76         NC::destroyScreen();
  77         windowTitle("");
  78 }
  79
  80 }
  81
  82 int main(int argc, char **argv)
  83 {
  84         using Global::myScreen;
  85
  86         using Global::wHeader;
  87         using Global::wFooter;
  88
  89         using Global::VolumeState;
  90         using Global::Timer;
  91
  92         std::setlocale(LC_ALL, "");
  93         std::locale::global(Charset::internalLocale());
  94
  95         if (!configure(argc, argv))
  96                 return 0;
  97
  98         // always execute these commands, even if ncmpcpp use exit function
  99         atexit(do_at_exit);
 100
 101         // redirect std::cerr output to ~/.ncmpcpp/error.log file
 102         errorlog.open((Config.ncmpcpp_directory + "error.log").c_str(), std::ios::app);
 103         cerr_buffer = std::cerr.rdbuf();
 104         std::cerr.rdbuf(errorlog.rdbuf());
 105
 106         sigignore(SIGPIPE);
 107         signal(SIGWINCH, sighandler);
 108
 109         Mpd.setNoidleCallback(Status::update);
 110
 111         NC::initScreen(Config.colors_enabled, Config.mouse_support);
 112
 113         Actions::OriginalStatusbarVisibility = Config.statusbar_visibility;
 114
 115         if (Config.design == Design::Alternative)
 116                 Config.statusbar_visibility = 0;
 117
 118         Actions::setWindowsDimensions();
 119         Actions::validateScreenSize();
 120         Actions::initializeScreens();
 121
 122         wHeader = new NC::Window(0, 0, COLS, Actions::HeaderHeight, "", Config.header_color, NC::Border());
 123         if (Config.header_visibility || Config.design == Design::Alternative)
 124                 wHeader->display();
 125
 126         wFooter = new NC::Window(0, Actions::FooterStartY, COLS, Actions::FooterHeight, "", Config.statusbar_color, NC::Border());
 127         wFooter->setPromptHook(Statusbar::Helpers::mainHook);
 128
 129         // initialize global timer
 130         Timer = boost::posix_time::microsec_clock::local_time();
 131
 132         // initialize global random number generator
 133         Global::RNG.seed(std::random_device()());
 134
 135         // initialize playlist
 136         myPlaylist->switchTo();
 137
 138         // go to startup screen
 139         if (Config.startup_screen_type != myScreen->type())
 140         {
 141                 auto startup_screen = toScreen(Config.startup_screen_type);
 142                 assert(startup_screen != nullptr);
 143                 startup_screen->switchTo();
 144         }
 145
 146         // lock current screen and go to the slave one if applicable
 147         if (Config.startup_slave_screen_type)
 148         {
 149                 auto slave_screen_type = *Config.startup_slave_screen_type;
 150                 bool screen_locked = myScreen->lock();
 151                 if (screen_locked && slave_screen_type != myScreen->type())
 152                 {
 153                         auto slave_screen = toScreen(slave_screen_type);
 154                         assert(slave_screen != nullptr);
 155                         slave_screen->switchTo();
 156                         if (!Config.startup_slave_screen_focus)
 157                                 Actions::get(Actions::Type::MasterScreen).execute();
 158                 }
 159         }
 160
 161         // local variables
 162         bool key_pressed = false;
 163         auto input = NC::Key::None;
 164         auto connect_attempt = boost::posix_time::from_time_t(0);
 165         auto update_environment = static_cast<Actions::UpdateEnvironment &>(
 166                 Actions::get(Actions::Type::UpdateEnvironment));
 167
 168         while (!Actions::ExitMainLoop)
 169         {
 170                 try
 171                 {
 172                         if (!Mpd.Connected() && Timer - connect_attempt > boost::posix_time::seconds(1))
 173                         {
 174                                 connect_attempt = Timer;
 175                                 // reset local status info
 176                                 Status::clear();
 177                                 // clear mpd callback
 178                                 wFooter->clearFDCallbacksList();
 179                                 try
 180                                 {
 181                                         Mpd.Connect();
 182                                         if (Mpd.Version() < 16)
 183                                         {
 184                                                         Mpd.Disconnect();
 185                                                         throw MPD::ClientError(MPD_ERROR_STATE, "MPD < 0.16.0 is not supported", false);
 186                                         }
 187                                 }
 188                                 catch (MPD::ClientError &e)
 189                                 {
 190                                         Status::handleClientError(e);
 191                                 }
 192                         }
 193
 194                         if (run_resize_screen)
 195                         {
 196                                 Actions::resizeScreen(true);
 197                                 run_resize_screen = false;
 198                         }
 199
 200                         update_environment.run(!key_pressed, key_pressed, false);
 201
 202                         input = readKey(*wFooter);
 203                         key_pressed = input != NC::Key::None;
 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, std::bind(&Binding::execute, ph::_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 }