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_SYS_IOCTL_H
  30 #  include <sys/ioctl.h>
  31 #endif
  32 #include <signal.h>
  33 #include <termios.h>
  34
  35 #define MIN_SCREEN_WIDTH 20
  36
  37 int term_use_colors;
  38
  39 static int force_colors;
  40 static int resize_dirty;
  41
  42 /* Resize the terminal if needed */
  43 void term_resize_dirty(void)
  44 {
  45 #ifdef TIOCGWINSZ
  46         struct winsize ws;
  47 #endif
  48         int width, height;
  49
  50         if (!resize_dirty)
  51                 return;
  52
  53         resize_dirty = FALSE;
  54
  55 #ifdef TIOCGWINSZ
  56         /* Get new window size */
  57         if (ioctl(0, TIOCGWINSZ, &ws) < 0)
  58                 return;
  59
  60         if (ws.ws_row == term_height && ws.ws_col == term_width) {
  61                 /* Same size, abort. */
  62                 return;
  63         }
  64
  65         if (ws.ws_col < MIN_SCREEN_WIDTH)
  66                 ws.ws_col = MIN_SCREEN_WIDTH;
  67
  68         width = ws.ws_col;
  69         height = ws.ws_row;
  70 #else
  71         width = height = -1;
  72 #endif
  73         term_resize(width, height);
  74         mainwindows_resize(term_width, term_height);
  75         term_resize_final(width, height);
  76 }
  77
  78 #ifdef SIGWINCH
  79 static void sig_winch(int p)
  80 {
  81         irssi_set_dirty();
  82         resize_dirty = TRUE;
  83 }
  84 #endif
  85
  86 static void cmd_resize(void)
  87 {
  88         resize_dirty = TRUE;
  89         term_resize_dirty();
  90 }
  91
  92 static void read_settings(void)
  93 {
  94         int old_colors = term_use_colors;
  95
  96         term_auto_detach(settings_get_bool("term_auto_detach"));
  97
  98         if (force_colors != settings_get_bool("term_force_colors")) {
  99                 force_colors = settings_get_bool("term_force_colors");
 100                 term_force_colors(force_colors);
 101         }
 102
 103         term_use_colors = settings_get_bool("colors") &&
 104                 (force_colors || term_has_colors());
 105
 106         if (term_use_colors != old_colors)
 107                 irssi_redraw();
 108 }
 109
 110 void term_common_init(void)
 111 {
 112 #ifdef SIGWINCH
 113         struct sigaction act;
 114 #endif
 115         settings_add_bool("lookandfeel", "colors", TRUE);
 116         settings_add_bool("lookandfeel", "term_force_colors", FALSE);
 117         settings_add_bool("lookandfeel", "term_auto_detach", FALSE);
 118         settings_add_bool("lookandfeel", "term_utf8", FALSE);
 119
 120         force_colors = FALSE;
 121         term_use_colors = term_has_colors() && settings_get_bool("colors");
 122         read_settings();
 123
 124         signal_add("beep", (SIGNAL_FUNC) term_beep);
 125         signal_add("setup changed", (SIGNAL_FUNC) read_settings);
 126         command_bind("resize", NULL, (SIGNAL_FUNC) cmd_resize);
 127
 128 #ifdef SIGWINCH
 129         sigemptyset (&act.sa_mask);
 130         act.sa_flags = 0;
 131         act.sa_handler = sig_winch;
 132         sigaction(SIGWINCH, &act, NULL);
 133 #endif
 134 }
 135
 136 void term_common_deinit(void)
 137 {
 138         command_unbind("resize", (SIGNAL_FUNC) cmd_resize);
 139         signal_remove("beep", (SIGNAL_FUNC) term_beep);
 140         signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
 141 }