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 <langinfo.h>
  31 #endif
  32
  33 #ifdef HAVE_SYS_IOCTL_H
  34 #  include <sys/ioctl.h>
  35 #endif
  36 #include <signal.h>
  37 #include <termios.h>
  38
  39 #define MIN_SCREEN_WIDTH 20
  40
  41 int term_width, term_height, term_detached;
  42
  43 int term_use_colors;
  44 int term_type;
  45
  46 static int force_colors;
  47 static int resize_dirty;
  48
  49 int term_get_size(int *width, int *height)
  50 {
  51 #ifdef TIOCGWINSZ
  52         struct winsize ws;
  53
  54         /* Get new window size */
  55         if (ioctl(0, TIOCGWINSZ, &ws) < 0)
  56                 return FALSE;
  57
  58         if (ws.ws_row == 0 && ws.ws_col == 0)
  59                 return FALSE;
  60
  61         *width = ws.ws_col;
  62         *height = ws.ws_row;
  63
  64         if (*width < MIN_SCREEN_WIDTH)
  65                 *width = MIN_SCREEN_WIDTH;
  66         if (*height < 1)
  67                 *height = 1;
  68         return TRUE;
  69 #else
  70         return FALSE;
  71 #endif
  72 }
  73
  74 /* Resize the terminal if needed */
  75 void term_resize_dirty(void)
  76 {
  77         int width, height;
  78
  79         if (!resize_dirty)
  80                 return;
  81
  82         resize_dirty = FALSE;
  83
  84         if (!term_get_size(&width, &height))
  85                 width = height = -1;
  86
  87         if (height != term_height || width != term_width) {
  88                 term_resize(width, height);
  89                 mainwindows_resize(term_width, term_height);
  90                 term_resize_final(width, height);
  91         }
  92 }
  93
  94 #ifdef SIGWINCH
  95 static void sig_winch(int p)
  96 {
  97         irssi_set_dirty();
  98         resize_dirty = TRUE;
  99 }
 100 #endif
 101
 102 static void cmd_resize(void)
 103 {
 104         resize_dirty = TRUE;
 105         term_resize_dirty();
 106 }
 107
 108 static void read_settings(void)
 109 {
 110         const char *str;
 111         int old_colors = term_use_colors;
 112         int old_type = term_type;
 113
 114         term_auto_detach(settings_get_bool("term_auto_detach"));
 115
 116         /* set terminal type */
 117         str = settings_get_str("term_type");
 118         if (g_strcasecmp(str, "utf-8") == 0)
 119                 term_type = TERM_TYPE_UTF8;
 120         else if (g_strcasecmp(str, "big5") == 0)
 121                 term_type = TERM_TYPE_BIG5;
 122         else
 123                 term_type = TERM_TYPE_8BIT;
 124
 125         if (old_type != term_type)
 126                 term_set_input_type(term_type);
 127
 128         /* change color stuff */
 129         if (force_colors != settings_get_bool("term_force_colors")) {
 130                 force_colors = settings_get_bool("term_force_colors");
 131                 term_force_colors(force_colors);
 132         }
 133
 134         term_use_colors = settings_get_bool("colors") &&
 135                 (force_colors || term_has_colors());
 136
 137         if (term_use_colors != old_colors)
 138                 irssi_redraw();
 139 }
 140
 141 void term_common_init(void)
 142 {
 143 #ifdef SIGWINCH
 144         struct sigaction act;
 145 #endif
 146         settings_add_bool("lookandfeel", "colors", TRUE);
 147         settings_add_bool("lookandfeel", "term_force_colors", FALSE);
 148         settings_add_bool("lookandfeel", "term_auto_detach", FALSE);
 149         settings_add_bool("lookandfeel", "mirc_blink_fix", FALSE);
 150         settings_add_str("lookandfeel", "term_type", "8bit");
 151
 152         force_colors = FALSE;
 153         term_use_colors = term_has_colors() && settings_get_bool("colors");
 154         read_settings();
 155
 156 #if defined (HAVE_NL_LANGINFO) && defined(CODESET)
 157         if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
 158                 term_type = TERM_TYPE_UTF8;
 159                 term_set_input_type(TERM_TYPE_UTF8);
 160         }
 161 #endif
 162
 163         signal_add("beep", (SIGNAL_FUNC) term_beep);
 164         signal_add("setup changed", (SIGNAL_FUNC) read_settings);
 165         command_bind("resize", NULL, (SIGNAL_FUNC) cmd_resize);
 166
 167 #ifdef SIGWINCH
 168         sigemptyset (&act.sa_mask);
 169         act.sa_flags = 0;
 170         act.sa_handler = sig_winch;
 171         sigaction(SIGWINCH, &act, NULL);
 172 #endif
 173 }
 174
 175 void term_common_deinit(void)
 176 {
 177         command_unbind("resize", (SIGNAL_FUNC) cmd_resize);
 178         signal_remove("beep", (SIGNAL_FUNC) term_beep);
 179         signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
 180 }