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screen_utils.c

/* 
 * $Id: screen_utils.c 3359 2005-06-15 20:36:50Z 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 <string.h>
#include <glib.h>
#include <ncurses.h>

#include "config.h"
#include "ncmpc.h"
#include "mpdclient.h"
#include "support.h"
#include "command.h"
#include "options.h"
#include "list_window.h"
#include "colors.h"
#include "wreadln.h"
#include "screen.h"

#define FIND_PROMPT  _("Find: ")
#define RFIND_PROMPT _("Find backward: ")

void
screen_bell(void)
{
  if( options.audible_bell )
    beep();
  if( options.visible_bell )
    flash();
}

int
screen_getch(WINDOW *w, char *prompt)
{
  int key = -1;
  int prompt_len = strlen(prompt);

  colors_use(w, COLOR_STATUS_ALERT);
  wclear(w);  
  wmove(w, 0, 0);
  waddstr(w, prompt);
  wmove(w, 0, prompt_len);
  
  echo();
  curs_set(1);
  timeout(-1);

  while( (key=my_wgetch(w)) == ERR )
    ;

#ifdef HAVE_GETMOUSE
  /* ignore mouse events */
  if( key==KEY_MOUSE )
    return screen_getch(w, prompt);
#endif

  noecho();
  curs_set(0);
  timeout(SCREEN_TIMEOUT);

  return key;
}

char *
screen_readln(WINDOW *w, 
            char *prompt, 
            char *value,
            GList **history,
            GCompletion *gcmp)
{
  char *line = NULL;

  wmove(w, 0,0);
  curs_set(1);
  colors_use(w, COLOR_STATUS_ALERT);
  line = wreadln(w, prompt, value, COLS, history, gcmp);
  curs_set(0);
  return line;
}

char *
screen_getstr(WINDOW *w, char *prompt)
{
  return screen_readln(w, prompt, NULL, NULL, NULL);
}


/* query user for a string and find it in a list window */
int 
screen_find(screen_t *screen,
          mpdclient_t *c,
          list_window_t *lw, 
          int rows,
          command_t findcmd,
          list_window_callback_fn_t callback_fn,
          void *callback_data)
{
  int reversed = 0;
  int retval   = 0;
  char *prompt = FIND_PROMPT;
  char *value = options.find_show_last_pattern ? (char *) -1 : NULL;

  if( findcmd==CMD_LIST_RFIND ||findcmd==CMD_LIST_RFIND_NEXT ) 
    {
      prompt = RFIND_PROMPT;
      reversed = 1;
    }

  switch(findcmd)
    {
    case CMD_LIST_FIND:
    case CMD_LIST_RFIND:
      if( screen->findbuf )
      {
        g_free(screen->findbuf);
        screen->findbuf=NULL;
      }
      /* continue... */
    case CMD_LIST_FIND_NEXT:
    case CMD_LIST_RFIND_NEXT:
      if( !screen->findbuf )
      screen->findbuf=screen_readln(screen->status_window.w,
                              prompt,
                              value,
                              &screen->find_history,
                              NULL);
      if( !screen->findbuf || !screen->findbuf[0] )
      return 1; 
      if( reversed )
      retval = list_window_rfind(lw, 
                           callback_fn,
                           callback_data, 
                           screen->findbuf,
                           options.find_wrap,
                           rows);
      else
      retval = list_window_find(lw,
                          callback_fn,
                          callback_data,
                          screen->findbuf,
                          options.find_wrap);
      if( retval == 0 )
      {
        lw->repaint  = 1;
      }
      else
      {
        screen_status_printf(_("Unable to find \'%s\'"), screen->findbuf);
        screen_bell();
      }
      return 1;
    default:
      break;
    }
  return 0;
}

void
screen_display_completion_list(screen_t *screen, GList *list)
{
  static GList *prev_list = NULL;
  static gint prev_length = 0;
  static gint offset = 0;
  WINDOW *w = screen->main_window.w;
  gint length, y=0;

  length = g_list_length(list);
  if( list==prev_list && length==prev_length )
    {
      offset += screen->main_window.rows;
      if( offset>=length )
      offset=0;
    }
  else
    {
      prev_list = list;
      prev_length = length;
      offset = 0;
    }

  colors_use(w, COLOR_STATUS_ALERT);
  while( y<screen->main_window.rows )
    {
      GList *item = g_list_nth(list, y+offset);

      wmove(w, y++, 0);
      wclrtoeol(w);
      if( item )
      {
        gchar *tmp = g_strdup(item->data);
        waddstr(w, basename(tmp));
        g_free(tmp);
      }
    }
  wrefresh(w);
  doupdate();
  colors_use(w, COLOR_LIST);
}

void
set_xterm_title(char *format, ...)
{
  /* the current xterm title exists under the WM_NAME property */
  /* and can be retreived with xprop -id $WINDOWID */

  if( options.enable_xterm_title )
    {
      if( g_getenv("WINDOWID") )
      {
        char *msg;
        va_list ap;
        
        va_start(ap,format);
        msg = g_strdup_vprintf(format,ap);
        va_end(ap);
        printf("%c]0;%s%c", '\033', msg, '\007'); 
        g_free(msg);
      }
      else
      options.enable_xterm_title = FALSE;
    }
}

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