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 /* Resize the terminal if needed */
  51 void term_resize_dirty(void)
  52 {
  53 #ifdef TIOCGWINSZ
  54         struct winsize ws;
  55 #endif
  56         int width, height;
  57
  58         if (!resize_dirty)
  59                 return;
  60
  61         resize_dirty = FALSE;
  62
  63 #ifdef TIOCGWINSZ
  64         /* Get new window size */
  65         if (ioctl(0, TIOCGWINSZ, &ws) < 0)
  66                 return;
  67
  68         if (ws.ws_row == term_height && ws.ws_col == term_width) {
  69                 /* Same size, abort. */
  70                 return;
  71         }
  72
  73         if (ws.ws_col < MIN_SCREEN_WIDTH)
  74                 ws.ws_col = MIN_SCREEN_WIDTH;
  75
  76         width = ws.ws_col;
  77         height = ws.ws_row;
  78 #else
  79         width = height = -1;
  80 #endif
  81         term_resize(width, height);
  82         mainwindows_resize(term_width, term_height);
  83         term_resize_final(width, height);
  84 }
  85
  86 #ifdef SIGWINCH
  87 static void sig_winch(int p)
  88 {
  89         irssi_set_dirty();
  90         resize_dirty = TRUE;
  91 }
  92 #endif
  93
  94 static void cmd_resize(void)
  95 {
  96         resize_dirty = TRUE;
  97         term_resize_dirty();
  98 }
  99
 100 static void read_settings(void)
 101 {
 102         const char *str;
 103         int old_colors = term_use_colors;
 104         int old_type = term_type;
 105
 106         term_auto_detach(settings_get_bool("term_auto_detach"));
 107
 108         /* set terminal type */
 109         str = settings_get_str("term_type");
 110         if (g_strcasecmp(str, "utf-8") == 0)
 111                 term_type = TERM_TYPE_UTF8;
 112         else if (g_strcasecmp(str, "big5") == 0)
 113                 term_type = TERM_TYPE_BIG5;
 114         else
 115                 term_type = TERM_TYPE_8BIT;
 116
 117         if (old_type != term_type)
 118                 term_set_input_type(term_type);
 119
 120         /* change color stuff */
 121         if (force_colors != settings_get_bool("term_force_colors")) {
 122                 force_colors = settings_get_bool("term_force_colors");
 123                 term_force_colors(force_colors);
 124         }
 125
 126         term_use_colors = settings_get_bool("colors") &&
 127                 (force_colors || term_has_colors());
 128
 129         if (term_use_colors != old_colors)
 130                 irssi_redraw();
 131 }
 132
 133 void term_common_init(void)
 134 {
 135 #ifdef SIGWINCH
 136         struct sigaction act;
 137 #endif
 138         settings_add_bool("lookandfeel", "colors", TRUE);
 139         settings_add_bool("lookandfeel", "term_force_colors", FALSE);
 140         settings_add_bool("lookandfeel", "term_auto_detach", FALSE);
 141         settings_add_bool("lookandfeel", "mirc_blink_fix", FALSE);
 142         settings_add_str("lookandfeel", "term_type", "8bit");
 143
 144         force_colors = FALSE;
 145         term_use_colors = term_has_colors() && settings_get_bool("colors");
 146         read_settings();
 147
 148 #if defined (HAVE_NL_LANGINFO) && defined(CODESET)
 149         setlocale(LC_CTYPE, "");
 150         if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
 151                 term_type = TERM_TYPE_UTF8;
 152                 term_set_input_type(TERM_TYPE_UTF8);
 153         }
 154 #endif
 155
 156         signal_add("beep", (SIGNAL_FUNC) term_beep);
 157         signal_add("setup changed", (SIGNAL_FUNC) read_settings);
 158         command_bind("resize", NULL, (SIGNAL_FUNC) cmd_resize);
 159
 160 #ifdef SIGWINCH
 161         sigemptyset (&act.sa_mask);
 162         act.sa_flags = 0;
 163         act.sa_handler = sig_winch;
 164         sigaction(SIGWINCH, &act, NULL);
 165 #endif
 166 }
 167
 168 void term_common_deinit(void)
 169 {
 170         command_unbind("resize", (SIGNAL_FUNC) cmd_resize);
 171         signal_remove("beep", (SIGNAL_FUNC) term_beep);
 172         signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
 173 }