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screen.c

/* 
 * $Id: screen.c 2668 2004-11-15 11:23:11Z kaw $
 *
 * (c) 2004 by Kalle Wallin <kaw@linux.se>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <locale.h>
#include <glib.h>
#include <ncurses.h>

#include "config.h"
#include "ncmpc.h"
#include "support.h"
#include "mpdclient.h"
#include "utils.h"
#include "command.h"
#include "options.h"
#include "colors.h"
#include "strfsong.h"
#include "wreadln.h"
#include "screen.h"
#include "screen_utils.h"

#define MAX_SONGNAME_LENGTH   512

#define SCREEN_PLAYLIST_ID     0
#define SCREEN_BROWSE_ID       1
#define SCREEN_HELP_ID         100
#define SCREEN_KEYDEF_ID       101
#define SCREEN_CLOCK_ID        102
#define SCREEN_SEARCH_ID       103


/* screens */
extern screen_functions_t *get_screen_playlist(void);
extern screen_functions_t *get_screen_browse(void);
extern screen_functions_t *get_screen_help(void);
extern screen_functions_t *get_screen_search(void);
extern screen_functions_t *get_screen_keydef(void);
extern screen_functions_t *get_screen_clock(void);

typedef screen_functions_t * (*screen_get_mode_functions_fn_t) (void);

typedef struct
{
  gint id;
  gchar *name;
  screen_get_mode_functions_fn_t get_mode_functions;
} screen_mode_info_t;


static screen_mode_info_t screens[] = {
  { SCREEN_PLAYLIST_ID, "playlist", get_screen_playlist },
  { SCREEN_BROWSE_ID,   "browse",   get_screen_browse },
  { SCREEN_HELP_ID,     "help",     get_screen_help },
#ifdef ENABLE_SEARCH_SCREEN
  { SCREEN_SEARCH_ID,   "search",   get_screen_search },
#endif
#ifdef ENABLE_KEYDEF_SCREEN
  { SCREEN_KEYDEF_ID,   "keydef",   get_screen_keydef },
#endif
#ifdef ENABLE_CLOCK_SCREEN
  { SCREEN_CLOCK_ID,    "clock",    get_screen_clock },
#endif
  { G_MAXINT, NULL,      NULL }
};

static gboolean welcome = TRUE;
static screen_t *screen = NULL;
static screen_functions_t *mode_fn = NULL;
static int seek_id = -1;
static int seek_target_time = 0;

static gint 
lookup_mode(gint id)
{
  gint i=0;

  while( screens[i].name )
    {
      if( screens[i].id == id )
      return i;
      i++;
    }
  return -1;
}

static void
switch_screen_mode(gint id, mpdclient_t *c)
{
  gint new_mode;

  if( id == screens[screen->mode].id )
    return;

  /* close the old mode */
  if( mode_fn && mode_fn->close )
    mode_fn->close();

  /* get functions for the new mode */
  new_mode = lookup_mode(id);
  if( new_mode>=0 && screens[new_mode].get_mode_functions )
    {
      D("switch_screen(%s)\n", screens[new_mode].name );
      mode_fn = screens[new_mode].get_mode_functions();
      screen->mode = new_mode;
    }

  screen->painted = 0;
  
  /* open the new mode */
  if( mode_fn && mode_fn->open )
    mode_fn->open(screen, c);

}

static void
paint_top_window(char *header, mpdclient_t *c, int clear)
{
  char flags[5];
  static int prev_volume = -1;
  static int prev_header_len = -1;
  WINDOW *w = screen->top_window.w;

  if(prev_header_len!=strlen(header))
    {
      prev_header_len = strlen(header);
      clear = 1;
    }

  if(clear)
    {
      wmove(w, 0, 0);
      wclrtoeol(w);
    }

  if(prev_volume!=c->status->volume || clear)
    {
      char buf[32];

      if( header[0] )
      {
        colors_use(w, COLOR_TITLE_BOLD);
        mvwaddstr(w, 0, 0, header);
      }
      else
      {
        colors_use(w, COLOR_TITLE_BOLD);
        waddstr(w, get_key_names(CMD_SCREEN_HELP, FALSE));
        colors_use(w, COLOR_TITLE);
        waddstr(w, _(":Help  "));
        colors_use(w, COLOR_TITLE_BOLD);
        waddstr(w, get_key_names(CMD_SCREEN_PLAY, FALSE));
        colors_use(w, COLOR_TITLE);
        waddstr(w, _(":Playlist  "));
        colors_use(w, COLOR_TITLE_BOLD);
        waddstr(w, get_key_names(CMD_SCREEN_FILE, FALSE));
        colors_use(w, COLOR_TITLE);
        waddstr(w, _(":Browse  "));
#ifdef ENABLE_SEARCH_SCREEN
        colors_use(w, COLOR_TITLE_BOLD);
        waddstr(w, get_key_names(CMD_SCREEN_SEARCH, FALSE));
        colors_use(w, COLOR_TITLE);
        waddstr(w, _(":Search  "));
#endif
      }
      if( c->status->volume==MPD_STATUS_NO_VOLUME )
      {
        g_snprintf(buf, 32, _("Volume n/a "));
      }
      else
      {
        g_snprintf(buf, 32, _(" Volume %d%%"), c->status->volume); 
      }
      colors_use(w, COLOR_TITLE);
      mvwaddstr(w, 0, screen->top_window.cols-strlen(buf), buf);

      flags[0] = 0;
      if( c->status->repeat )
      g_strlcat(flags, "r", sizeof(flags));
      if( c->status->random )
      g_strlcat(flags, "z", sizeof(flags));;
      if( c->status->crossfade )
      g_strlcat(flags, "x", sizeof(flags));
      if( c->status->updatingDb )
      g_strlcat(flags, "U", sizeof(flags));
      colors_use(w, COLOR_LINE);
      mvwhline(w, 1, 0, ACS_HLINE, screen->top_window.cols);
      if( flags[0] )
      {
        wmove(w,1,screen->top_window.cols-strlen(flags)-3);
        waddch(w, '[');
        colors_use(w, COLOR_LINE_BOLD);
        waddstr(w, flags);
        colors_use(w, COLOR_LINE);
        waddch(w, ']');
      }
      wnoutrefresh(w);
    }
}

static void
paint_progress_window(mpdclient_t *c)
{
  double p;
  int width;
  int elapsedTime = c->status->elapsedTime;

  if( c->status==NULL || IS_STOPPED(c->status->state) )
    {
      mvwhline(screen->progress_window.w, 0, 0, ACS_HLINE, 
             screen->progress_window.cols);
      wnoutrefresh(screen->progress_window.w);
      return;
    }

  if( c->song && seek_id == c->song->id )
    elapsedTime = seek_target_time;

  p = ((double) elapsedTime) / ((double) c->status->totalTime);
  
  width = (int) (p * (double) screen->progress_window.cols);
  mvwhline(screen->progress_window.w, 
         0, 0,
         ACS_HLINE, 
         screen->progress_window.cols);
  whline(screen->progress_window.w, '=', width-1);
  mvwaddch(screen->progress_window.w, 0, width-1, 'O');
  wnoutrefresh(screen->progress_window.w);
}

static void 
paint_status_window(mpdclient_t *c)
{
  WINDOW *w = screen->status_window.w;
  mpd_Status *status = c->status;
  mpd_Song *song   = c->song;
  int elapsedTime = c->status->elapsedTime;
  char *str = NULL;
  int x = 0;

  if( time(NULL) - screen->status_timestamp <= SCREEN_STATUS_MESSAGE_TIME )
    return;
   
  wmove(w, 0, 0);
  wclrtoeol(w);
  colors_use(w, COLOR_STATUS_BOLD);
  
  switch(status->state)
    {
    case MPD_STATUS_STATE_PLAY:
      str = _("Playing:");
      break;
    case MPD_STATUS_STATE_PAUSE:
      str = _("[Paused]");
      break;
    case MPD_STATUS_STATE_STOP:
    default:
      break;
    }

  if( str )
    {
      waddstr(w, str);
      x += strlen(str)+1;
    }

  /* create time string */
  memset(screen->buf, 0, screen->buf_size);
  if( IS_PLAYING(status->state) || IS_PAUSED(status->state) )
    {
      if( status->totalTime > 0 )
      {
        if( c->song && seek_id == c->song->id )
          elapsedTime = seek_target_time;
        g_snprintf(screen->buf, screen->buf_size, 
               " [%i:%02i/%i:%02i]",
               elapsedTime/60, elapsedTime%60,
               status->totalTime/60,   status->totalTime%60 );
      }
      else
      {
        g_snprintf(screen->buf, screen->buf_size,  
                 " [%d kbps]", status->bitRate );
      }
    }
  else
    {
      time_t timep;

      time(&timep);
      strftime(screen->buf, screen->buf_size, "%X ",localtime(&timep));
    }

  /* display song */
  if( (IS_PLAYING(status->state) || IS_PAUSED(status->state)) )
    {
      char songname[MAX_SONGNAME_LENGTH];
      int width = COLS-x-strlen(screen->buf);

      if( song )
      strfsong(songname, MAX_SONGNAME_LENGTH, STATUS_FORMAT, song);
      else
      songname[0] = '\0';

      colors_use(w, COLOR_STATUS);
      /* scroll if the song name is to long */
      if( strlen(songname) > width )
      {
        static  scroll_state_t st = { 0, 0 };
        char *tmp = strscroll(songname, " *** ", width, &st);

        g_strlcpy(songname, tmp, MAX_SONGNAME_LENGTH);
        g_free(tmp);      
      }
      mvwaddnstr(w, 0, x, songname, width);
    } 

  /* display time string */
  if( screen->buf[0] )
    {
      x = screen->status_window.cols - strlen(screen->buf);
      colors_use(w, COLOR_STATUS_TIME);
      mvwaddstr(w, 0, x, screen->buf);
    }

  wnoutrefresh(w);
}

int
screen_exit(void)
{
  endwin();
  if( screen )
    {
      gint i;

      /* close and exit all screens (playlist,browse,help...) */
      i=0;
      while( screens[i].get_mode_functions )
      {
        screen_functions_t *mode_fn = screens[i].get_mode_functions();

        if( mode_fn && mode_fn->close )
          mode_fn->close();
        if( mode_fn && mode_fn->exit )
          mode_fn->exit();

        i++;
      }
     
      string_list_free(screen->find_history);
      g_free(screen->buf);
      g_free(screen->findbuf);
      
      g_free(screen);
      screen = NULL;
    }
  return 0;
}

void
screen_resize(void)
{
  gint i;

  D("Resize rows %d->%d, cols %d->%d\n",screen->rows,LINES,screen->cols,COLS);
  if( COLS<SCREEN_MIN_COLS || LINES<SCREEN_MIN_ROWS )
    {
      screen_exit();
      fprintf(stderr, _("Error: Screen to small!\n"));
      exit(EXIT_FAILURE);
    }

  resizeterm(LINES, COLS);

  screen->cols = COLS;
  screen->rows = LINES;

  /* top window */
  screen->top_window.cols = screen->cols;
  wresize(screen->top_window.w, 2, screen->cols);

  /* main window */
  screen->main_window.cols = screen->cols;
  screen->main_window.rows = screen->rows-4;
  wresize(screen->main_window.w, screen->main_window.rows, screen->cols);
  wclear(screen->main_window.w);

  /* progress window */
  screen->progress_window.cols = screen->cols;
  wresize(screen->progress_window.w, 1, screen->cols);
  mvwin(screen->progress_window.w, screen->rows-2, 0);

  /* status window */
  screen->status_window.cols = screen->cols;
  wresize(screen->status_window.w, 1, screen->cols);
  mvwin(screen->status_window.w, screen->rows-1, 0);

  screen->buf_size = screen->cols;
  g_free(screen->buf);
  screen->buf = g_malloc(screen->cols);

  /* close and exit all screens (playlist,browse,help...) */
  i=0;
  while( screens[i].get_mode_functions )
    {
      screen_functions_t *mode_fn = screens[i].get_mode_functions();

      if( mode_fn && mode_fn->resize )
      mode_fn->resize(screen->main_window.cols, screen->main_window.rows);

      i++;
    }

  /* ? - without this the cursor becomes visible with aterm & Eterm */
  curs_set(1);
  curs_set(0);     

  screen->painted = 0;
}

void 
screen_status_message(char *msg)
{
  WINDOW *w = screen->status_window.w;

  wmove(w, 0, 0);
  wclrtoeol(w);
  colors_use(w, COLOR_STATUS_ALERT);
  waddstr(w, msg);
  wnoutrefresh(w);
  screen->status_timestamp = time(NULL);
}

void 
screen_status_printf(char *format, ...)
{
  char *msg;
  va_list ap;
  
  va_start(ap,format);
  msg = g_strdup_vprintf(format,ap);
  va_end(ap);
  screen_status_message(msg);
  g_free(msg);
}

int
screen_init(mpdclient_t *c)
{
  gint i;

  /* initialize the curses library */
  initscr();
  /* initialize color support */
  colors_start();
  /* tell curses not to do NL->CR/NL on output */
  nonl();          
  /*  use raw mode (ignore interrupt,quit,suspend, and flow control ) */
#ifdef ENABLE_RAW_MODE
  raw();
#endif
  /* don't echo input */
  noecho();    
  /* set cursor invisible */     
  curs_set(0);     
  /* enable extra keys */
  keypad(stdscr, TRUE);  
  /* return from getch() without blocking */
  timeout(SCREEN_TIMEOUT);
  /* initialize mouse support */
#ifdef HAVE_GETMOUSE
  if( options.enable_mouse )
    mousemask(ALL_MOUSE_EVENTS, NULL);
#endif

  if( COLS<SCREEN_MIN_COLS || LINES<SCREEN_MIN_ROWS )
    {
      fprintf(stderr, _("Error: Screen to small!\n"));
      exit(EXIT_FAILURE);
    }

  screen = g_malloc(sizeof(screen_t));
  memset(screen, 0, sizeof(screen_t));
  screen->mode = 0;
  screen->cols = COLS;
  screen->rows = LINES;
  screen->buf  = g_malloc(screen->cols);
  screen->buf_size = screen->cols;
  screen->findbuf = NULL;
  screen->painted = 0;
  screen->start_timestamp = time(NULL);
  screen->input_timestamp = time(NULL);
  screen->last_cmd = CMD_NONE;

  /* create top window */
  screen->top_window.rows = 2;
  screen->top_window.cols = screen->cols;
  screen->top_window.w = newwin(screen->top_window.rows, 
                          screen->top_window.cols,
                          0, 0);
  leaveok(screen->top_window.w, TRUE);
  keypad(screen->top_window.w, TRUE);  

  /* create main window */
  screen->main_window.rows = screen->rows-4;
  screen->main_window.cols = screen->cols;
  screen->main_window.w = newwin(screen->main_window.rows, 
                         screen->main_window.cols,
                         2, 
                         0);

  //  leaveok(screen->main_window.w, TRUE); temporary disabled
  keypad(screen->main_window.w, TRUE);  

  /* create progress window */
  screen->progress_window.rows = 1;
  screen->progress_window.cols = screen->cols;
  screen->progress_window.w = newwin(screen->progress_window.rows, 
                             screen->progress_window.cols,
                             screen->rows-2, 
                             0);
  leaveok(screen->progress_window.w, TRUE);
  
  /* create status window */
  screen->status_window.rows = 1;
  screen->status_window.cols = screen->cols;
  screen->status_window.w = newwin(screen->status_window.rows, 
                           screen->status_window.cols,
                           screen->rows-1, 
                           0);

  leaveok(screen->status_window.w, FALSE);
  keypad(screen->status_window.w, TRUE);  

  if( options.enable_colors )
    {
      /* set background attributes */
      wbkgd(stdscr, COLOR_PAIR(COLOR_LIST)); 
      wbkgd(screen->main_window.w,     COLOR_PAIR(COLOR_LIST));
      wbkgd(screen->top_window.w,      COLOR_PAIR(COLOR_TITLE));
      wbkgd(screen->progress_window.w, COLOR_PAIR(COLOR_PROGRESSBAR));
      wbkgd(screen->status_window.w,   COLOR_PAIR(COLOR_STATUS));
      colors_use(screen->progress_window.w, COLOR_PROGRESSBAR);
    }

  /* initialize screens */
  i=0;
  while( screens[i].get_mode_functions )
    {
      screen_functions_t *fn = screens[i].get_mode_functions();

      if( fn && fn->init )
      fn->init(screen->main_window.w, 
             screen->main_window.cols,
             screen->main_window.rows);

      i++;
    }

  mode_fn = get_screen_playlist();
  if( mode_fn && mode_fn->open )
    mode_fn->open(screen, c);

  /* initialize wreadln */
  wrln_wgetch = my_wgetch;
  wrln_max_history_length = 16;

  return 0;
}

void 
screen_paint(mpdclient_t *c)
{
  char *title = NULL;

  if( mode_fn && mode_fn->get_title )
    title = mode_fn->get_title(screen->buf,screen->buf_size);

  D("screen_paint(%s)\n", title);
  /* paint the title/header window */
  if( title )
    paint_top_window(title, c, 1);
  else
    paint_top_window("", c, 1);

  /* paint the main window */
  wclear(screen->main_window.w);
  if( mode_fn && mode_fn->paint )
    mode_fn->paint(screen, c);
  
  paint_progress_window(c);
  paint_status_window(c);
  screen->painted = 1;
  wmove(screen->main_window.w, 0, 0);  
  wnoutrefresh(screen->main_window.w);

  /* tell curses to update */
  doupdate();
}

void 
screen_update(mpdclient_t *c)
{
  static int repeat = -1;
  static int random = -1;
  static int crossfade = -1;
  static int dbupdate = -1;
  list_window_t *lw = NULL;

  if( !screen->painted )
    return screen_paint(c);

  /* print a message if mpd status has changed */
  if( repeat<0 )
    {
      repeat = c->status->repeat;
      random = c->status->random;
      crossfade = c->status->crossfade;
      dbupdate = c->status->updatingDb;
    }
  if( repeat != c->status->repeat )
    screen_status_printf(c->status->repeat ? 
                   _("Repeat is on") :
                   _("Repeat is off"));
  if( random != c->status->random )
    screen_status_printf(c->status->random ?
                   _("Random is on") :
                   _("Random is off"));
                   
  if( crossfade != c->status->crossfade )
    screen_status_printf(_("Crossfade %d seconds"), c->status->crossfade);
  if( dbupdate && dbupdate != c->status->updatingDb )
    {
      screen_status_printf(_("Database updated!"));
      mpdclient_browse_callback(c, BROWSE_DB_UPDATED, NULL);
    }

  repeat = c->status->repeat;
  random = c->status->random;
  crossfade = c->status->crossfade;
  dbupdate = c->status->updatingDb;

  /* update title/header window */
  if( welcome && screen->last_cmd==CMD_NONE &&
      time(NULL)-screen->start_timestamp <= SCREEN_WELCOME_TIME)
    paint_top_window("", c, 0);
  else if( mode_fn && mode_fn->get_title )
    {
      paint_top_window(mode_fn->get_title(screen->buf,screen->buf_size), c, 0);
      welcome = FALSE;
    }
  else
    paint_top_window("", c, 0);

  /* update the main window */
  if( mode_fn && mode_fn->paint )
    mode_fn->update(screen, c);

  if( mode_fn && mode_fn->get_lw )
    lw = mode_fn->get_lw();

  /* update progress window */
  paint_progress_window(c);

  /* update status window */
  paint_status_window(c);

  /* move the cursor to the selected row in the main window */
  if( lw )
    wmove(screen->main_window.w, LW_ROW(lw), 0);   
  else
    wmove(screen->main_window.w, 0, 0);   
  wnoutrefresh(screen->main_window.w);

  /* tell curses to update */
  doupdate();
}

void
screen_idle(mpdclient_t *c)
{
  if( c->song && seek_id ==  c->song->id &&
      (screen->last_cmd == CMD_SEEK_FORWARD || 
       screen->last_cmd == CMD_SEEK_BACKWARD) )
    {
      mpdclient_cmd_seek(c, seek_id, seek_target_time);
    }

  screen->last_cmd = CMD_NONE;
  seek_id = -1;
}

#ifdef HAVE_GETMOUSE
int
screen_get_mouse_event(mpdclient_t *c,
                   list_window_t *lw, int lw_length, 
                   unsigned long *bstate, int *row)
{
  MEVENT event;

  /* retreive the mouse event from ncurses */
  getmouse(&event);
  D("mouse: id=%d  y=%d,x=%d,z=%d\n",event.id,event.y,event.x,event.z);
  /* calculate the selected row in the list window */
  *row = event.y - screen->top_window.rows;
  /* copy button state bits */
  *bstate = event.bstate;
  /* if button 2 was pressed switch screen */
  if( event.bstate & BUTTON2_CLICKED )
    {
      screen_cmd(c, CMD_SCREEN_NEXT);
      return 1;
    }
  /* if the even occured above the list window move up */
  if( *row<0 && lw )
    {
      if( event.bstate & BUTTON3_CLICKED )
      list_window_first(lw);
      else
      list_window_previous_page(lw);
      return 1;
    }
   /* if the even occured below the list window move down */
  if( *row>=lw->rows && lw )
    {
      if( event.bstate & BUTTON3_CLICKED )
      list_window_last(lw, lw_length);
      else
      list_window_next_page(lw, lw_length);
      return 1;
    } 
  return 0;
}
#endif

void 
screen_cmd(mpdclient_t *c, command_t cmd)
{
  screen->input_timestamp = time(NULL);
  screen->last_cmd = cmd;
  welcome = FALSE;

  if( mode_fn && mode_fn->cmd && mode_fn->cmd(screen, c, cmd) )
    return;

  switch(cmd)
    {
    case CMD_PLAY:
      mpdclient_cmd_play(c, MPD_PLAY_AT_BEGINNING);
      break;
    case CMD_PAUSE:
      mpdclient_cmd_pause(c, !IS_PAUSED(c->status->state));
      break;
    case CMD_STOP:
      mpdclient_cmd_stop(c);
      break;
    case CMD_SEEK_FORWARD:
      if( !IS_STOPPED(c->status->state) )
      {
        if( c->song && seek_id != c->song->id )
          {
            seek_id = c->song->id;
            seek_target_time = c->status->elapsedTime;
          }
        seek_target_time++;
        if( seek_target_time < c->status->totalTime )
          break;
        seek_target_time = c->status->totalTime;
        /* seek_target_time=0; */
      }
      break;
      /* fall through... */
    case CMD_TRACK_NEXT:
      if( !IS_STOPPED(c->status->state) )
      mpdclient_cmd_next(c);
      break;
    case CMD_SEEK_BACKWARD:
      if( !IS_STOPPED(c->status->state) )
      {
        if( seek_id != c->song->id )
          {
            seek_id = c->song->id;
            seek_target_time = c->status->elapsedTime;
          }
        seek_target_time--;
        if( seek_target_time < 0 )
          seek_target_time=0;
      }
      break;
    case CMD_TRACK_PREVIOUS:
      if( !IS_STOPPED(c->status->state) )
      mpdclient_cmd_prev(c);
      break;   
    case CMD_SHUFFLE:
      if( mpdclient_cmd_shuffle(c) == 0 )
      screen_status_message(_("Shuffled playlist!"));
      break;
    case CMD_CLEAR:
      if( mpdclient_cmd_clear(c) == 0 )
      screen_status_message(_("Cleared playlist!"));
      break;
    case CMD_REPEAT:
      mpdclient_cmd_repeat(c, !c->status->repeat);
      break;
    case CMD_RANDOM:
      mpdclient_cmd_random(c, !c->status->random);
      break;
    case CMD_CROSSFADE:
      if(  c->status->crossfade )
      mpdclient_cmd_crossfade(c, 0);
      else
      mpdclient_cmd_crossfade(c, options.crossfade_time);   
      break;
    case CMD_DB_UPDATE:
      if( !c->status->updatingDb )
      {
        if( mpdclient_cmd_db_update_utf8(c,NULL)==0 )
          screen_status_printf(_("Database update started!"));
      }
      else
      screen_status_printf(_("Database update running..."));
      break;
    case CMD_VOLUME_UP:
      if( c->status->volume!=MPD_STATUS_NO_VOLUME && c->status->volume<100 )
      mpdclient_cmd_volume(c, ++c->status->volume);
      break;
    case CMD_VOLUME_DOWN:
      if( c->status->volume!=MPD_STATUS_NO_VOLUME && c->status->volume>0 )
      mpdclient_cmd_volume(c, --c->status->volume);
      break;
    case CMD_TOGGLE_FIND_WRAP:
      options.find_wrap = !options.find_wrap;
      screen_status_printf(options.find_wrap ? 
                     _("Find mode: Wrapped") :
                     _("Find mode: Normal"));
      break;
    case CMD_TOGGLE_AUTOCENTER:
      options.auto_center = !options.auto_center;
      screen_status_printf(options.auto_center ?
                     _("Auto center mode: On") :
                     _("Auto center mode: Off"));
      break;
    case CMD_SCREEN_UPDATE:
      screen->painted = 0;
      break;
    case CMD_SCREEN_PREVIOUS:
      if( screen->mode > 0 )
      switch_screen_mode(screens[screen->mode-1].id, c);
      else
      switch_screen_mode(lookup_mode(SCREEN_HELP_ID)-1, c);
      break;
    case CMD_SCREEN_NEXT:
      if( screens[screen->mode+1].id < SCREEN_HELP_ID )
      switch_screen_mode(screens[screen->mode+1].id, c);
      else
      switch_screen_mode(screens[0].id, c);
      break;
    case CMD_SCREEN_PLAY:
      switch_screen_mode(SCREEN_PLAYLIST_ID, c);
      break;
    case CMD_SCREEN_FILE:
      switch_screen_mode(SCREEN_BROWSE_ID, c);
      break;
    case CMD_SCREEN_HELP:
      switch_screen_mode(SCREEN_HELP_ID, c);
      break;
    case CMD_SCREEN_SEARCH:
      switch_screen_mode(SCREEN_SEARCH_ID, c);
      break;
    case CMD_SCREEN_KEYDEF:
      switch_screen_mode(SCREEN_KEYDEF_ID, c);
      break;
    case CMD_SCREEN_CLOCK:
      switch_screen_mode(SCREEN_CLOCK_ID, c);
      break;
    case CMD_QUIT:
      exit(EXIT_SUCCESS);
    default:
      break;
    }
}




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