apps/irssi/src/fe-text/term.c

   1 /*
   2  term.c : irssi
   3
   4     Copyright (C) 2001 Timo Sirainen
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 #include "module.h"
  22 #include "signals.h"
  23 #include "commands.h"
  24 #include "settings.h"
  25
  26 #include "term.h"
  27 #include "mainwindows.h"
  28
  29 #ifdef HAVE_NL_LANGINFO
  30 #  include <locale.h>
  31 #  include <langinfo.h>
  32 #endif
  33
  34 #ifdef HAVE_SYS_IOCTL_H
  35 #  include <sys/ioctl.h>
  36 #endif
  37 #include <signal.h>
  38 #include <termios.h>
  39
  40 #define MIN_SCREEN_WIDTH 20
  41
  42 int term_width, term_height, term_detached;
  43
  44 int term_use_colors;
  45 int term_type;
  46
  47 static int force_colors;
  48 static int resize_dirty;
  49
  50 int term_get_size(int *width, int *height)
  51 {
  52 #ifdef TIOCGWINSZ
  53         struct winsize ws;
  54
  55         /* Get new window size */
  56         if (ioctl(0, TIOCGWINSZ, &ws) < 0)
  57                 return FALSE;
  58
  59         if (ws.ws_row == 0 && ws.ws_col == 0)
  60                 return FALSE;
  61
  62         *width = ws.ws_col;
  63         *height = ws.ws_row;
  64
  65         if (*width < MIN_SCREEN_WIDTH)
  66                 *width = MIN_SCREEN_WIDTH;
  67         if (*height < 1)
  68                 *height = 1;
  69         return TRUE;
  70 #else
  71         return FALSE;
  72 #endif
  73 }
  74
  75 /* Resize the terminal if needed */
  76 void term_resize_dirty(void)
  77 {
  78         int width, height;
  79
  80         if (!resize_dirty)
  81                 return;
  82
  83         resize_dirty = FALSE;
  84
  85         if (!term_get_size(&width, &height))
  86                 width = height = -1;
  87
  88         if (height != term_height || width != term_width) {
  89                 term_resize(width, height);
  90                 mainwindows_resize(term_width, term_height);
  91                 term_resize_final(width, height);
  92         }
  93 }
  94
  95 #ifdef SIGWINCH
  96 static void sig_winch(int p)
  97 {
  98         irssi_set_dirty();
  99         resize_dirty = TRUE;
 100 }
 101 #endif
 102
 103 static void cmd_resize(void)
 104 {
 105         resize_dirty = TRUE;
 106         term_resize_dirty();
 107 }
 108
 109 static void read_settings(void)
 110 {
 111         const char *str;
 112         int old_colors = term_use_colors;
 113         int old_type = term_type;
 114
 115         term_auto_detach(settings_get_bool("term_auto_detach"));
 116
 117         /* set terminal type */
 118         str = settings_get_str("term_type");
 119         if (g_strcasecmp(str, "utf-8") == 0)
 120                 term_type = TERM_TYPE_UTF8;
 121         else if (g_strcasecmp(str, "big5") == 0)
 122                 term_type = TERM_TYPE_BIG5;
 123         else
 124                 term_type = TERM_TYPE_8BIT;
 125
 126         if (old_type != term_type)
 127                 term_set_input_type(term_type);
 128
 129         /* change color stuff */
 130         if (force_colors != settings_get_bool("term_force_colors")) {
 131                 force_colors = settings_get_bool("term_force_colors");
 132                 term_force_colors(force_colors);
 133         }
 134
 135         term_use_colors = settings_get_bool("colors") &&
 136                 (force_colors || term_has_colors());
 137
 138         if (term_use_colors != old_colors)
 139                 irssi_redraw();
 140 }
 141
 142 void term_common_init(void)
 143 {
 144 #ifdef SIGWINCH
 145         struct sigaction act;
 146 #endif
 147         settings_add_bool("lookandfeel", "colors", TRUE);
 148         settings_add_bool("lookandfeel", "term_force_colors", FALSE);
 149         settings_add_bool("lookandfeel", "term_auto_detach", FALSE);
 150         settings_add_bool("lookandfeel", "mirc_blink_fix", FALSE);
 151         settings_add_str("lookandfeel", "term_type", "8bit");
 152
 153         force_colors = FALSE;
 154         term_use_colors = term_has_colors() && settings_get_bool("colors");
 155         read_settings();
 156
 157 #if defined (HAVE_NL_LANGINFO) && defined(CODESET)
 158         setlocale(LC_CTYPE, "");
 159         if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
 160                 term_type = TERM_TYPE_UTF8;
 161                 term_set_input_type(TERM_TYPE_UTF8);
 162         }
 163 #endif
 164
 165         signal_add("beep", (SIGNAL_FUNC) term_beep);
 166         signal_add("setup changed", (SIGNAL_FUNC) read_settings);
 167         command_bind("resize", NULL, (SIGNAL_FUNC) cmd_resize);
 168
 169 #ifdef SIGWINCH
 170         sigemptyset (&act.sa_mask);
 171         act.sa_flags = 0;
 172         act.sa_handler = sig_winch;
 173         sigaction(SIGWINCH, &act, NULL);
 174 #endif
 175 }
 176
 177 void term_common_deinit(void)
 178 {
 179         command_unbind("resize", (SIGNAL_FUNC) cmd_resize);
 180         signal_remove("beep", (SIGNAL_FUNC) term_beep);
 181         signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
 182 }