cgit.sxemacs.org Git - sxemacs/blob - src/ui/TTY/device-tty.c

   1 /* TTY device functions.
   2    Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
   3    Copyright (C) 1994, 1995 Free Software Foundation, Inc.
   4    Copyright (C) 1996 Ben Wing.
   5
   6 This file is part of SXEmacs
   7
   8 SXEmacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 SXEmacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  20
  21
  22 /* Synched up with: Not in FSF. */
  23
  24 /* Authors: Ben Wing and Chuck Thompson. */
  25
  26 #include <config.h>
  27 #include "lisp.h"
  28
  29 #include "console-tty.h"
  30 #include "ui/console-stream.h"
  31 #include "events/events.h"
  32 #include "ui/faces.h"
  33 #include "ui/frame.h"
  34 #include "lstream.h"
  35 #include "ui/redisplay.h"
  36 #include "sysdep.h"
  37
  38 #include "syssignal.h"          /* for SIGWINCH */
  39
  40 #include <errno.h>
  41
  42 Lisp_Object Qinit_pre_tty_win, Qinit_post_tty_win;
  43 \f
  44 static void allocate_tty_device_struct(struct device *d)
  45 {
  46         d->device_data = xnew_and_zero(struct tty_device);
  47 }
  48
  49 static void tty_init_device(struct device *d, Lisp_Object props)
  50 {
  51         struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
  52         Lisp_Object terminal_type = CONSOLE_TTY_DATA(con)->terminal_type;
  53
  54         DEVICE_INFD(d) = CONSOLE_TTY_DATA(con)->infd;
  55         DEVICE_OUTFD(d) = CONSOLE_TTY_DATA(con)->outfd;
  56
  57         allocate_tty_device_struct(d);
  58         init_baud_rate(d);
  59
  60         switch (init_tty_for_redisplay(d, (char *)XSTRING_DATA(terminal_type))) {
  61
  62         case TTY_UNABLE_OPEN_DATABASE:
  63                 suppress_early_error_handler_backtrace = 1;
  64                 error("Can't access terminal information database");
  65                 break;
  66
  67         case TTY_TYPE_UNDEFINED:
  68                 suppress_early_error_handler_backtrace = 1;
  69                 error
  70                     ("Terminal type `%s' undefined (or can't access database?)",
  71                      XSTRING_DATA(terminal_type));
  72                 break;
  73         case TTY_TYPE_INSUFFICIENT:
  74                 suppress_early_error_handler_backtrace = 1;
  75                 error("Terminal type `%s' not powerful enough to run Emacs",
  76                       XSTRING_DATA(terminal_type));
  77                 break;
  78         case TTY_SIZE_UNSPECIFIED:
  79                 suppress_early_error_handler_backtrace = 1;
  80                 error("Can't determine window size of terminal");
  81                 break;
  82         case TTY_INIT_SUCCESS:
  83                 break;
  84         default:
  85                 abort();
  86         }
  87
  88         init_one_device(d);
  89
  90         /* Run part of the elisp side of the TTY device initialization.
  91            The post-init is run in the tty_after_init_frame() method. */
  92         call0(Qinit_pre_tty_win);
  93 }
  94
  95 static void free_tty_device_struct(struct device *d)
  96 {
  97         struct tty_device *td = (struct tty_device *)d->device_data;
  98         if (td)
  99                 xfree(td);
 100 }
 101
 102 static void tty_delete_device(struct device *d)
 103 {
 104         free_tty_device_struct(d);
 105 }
 106
 107 #ifdef SIGWINCH
 108
 109 static SIGTYPE tty_device_size_change_signal(int signo)
 110 {
 111         int old_errno = errno;
 112         asynch_device_change_pending++;
 113 #ifdef HAVE_UNIXOID_EVENT_LOOP
 114         signal_fake_event();
 115 #endif
 116         EMACS_REESTABLISH_SIGNAL(SIGWINCH, tty_device_size_change_signal);
 117         errno = old_errno;
 118         SIGRETURN;
 119 }
 120
 121 /* frame_change_signal does nothing but set a flag that it was called.
 122    When redisplay is called, it will notice that the flag is set and
 123    call handle_pending_device_size_change to do the actual work. */
 124 static void tty_asynch_device_change(void)
 125 {
 126         Lisp_Object devcons, concons;
 127
 128         DEVICE_LOOP_NO_BREAK(devcons, concons) {
 129                 int width, height;
 130                 Lisp_Object tail;
 131                 struct device *d = XDEVICE(XCAR(devcons));
 132                 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
 133
 134                 if (!DEVICE_TTY_P(d))
 135                         continue;
 136
 137                 get_tty_device_size(d, &width, &height);
 138                 if (width > 0 && height > 0
 139                     && (CONSOLE_TTY_DATA(con)->width != width
 140                         || CONSOLE_TTY_DATA(con)->height != height)) {
 141                         CONSOLE_TTY_DATA(con)->width = width;
 142                         CONSOLE_TTY_DATA(con)->height = height;
 143
 144                         for (tail = DEVICE_FRAME_LIST(d);
 145                              !NILP(tail); tail = XCDR(tail)) {
 146                                 struct frame *f = XFRAME(XCAR(tail));
 147
 148                                 /* We know the frame is tty because we made sure that the
 149                                    device is tty. */
 150                                 change_frame_size(f, height, width, 1);
 151                         }
 152                 }
 153         }
 154 }
 155
 156 #endif                          /* SIGWINCH */
 157
 158 static Lisp_Object
 159 tty_device_system_metrics(struct device *d, enum device_metrics m)
 160 {
 161         struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
 162         switch ((unsigned int)m) {
 163         case DM_size_device:
 164                 return Fcons(make_int(CONSOLE_TTY_DATA(con)->width),
 165                              make_int(CONSOLE_TTY_DATA(con)->height));
 166         default:
 167                 /* No such device metric property for TTY devices */
 168                 return Qunbound;
 169         }
 170 }
 171 \f
 172 /************************************************************************/
 173 /*                            initialization                            */
 174 /************************************************************************/
 175
 176 void syms_of_device_tty(void)
 177 {
 178         defsymbol(&Qinit_pre_tty_win, "init-pre-tty-win");
 179         defsymbol(&Qinit_post_tty_win, "init-post-tty-win");
 180 }
 181
 182 void console_type_create_device_tty(void)
 183 {
 184         /* device methods */
 185         CONSOLE_HAS_METHOD(tty, init_device);
 186         CONSOLE_HAS_METHOD(tty, delete_device);
 187 #ifdef SIGWINCH
 188         CONSOLE_HAS_METHOD(tty, asynch_device_change);
 189 #endif                          /* SIGWINCH */
 190         CONSOLE_HAS_METHOD(tty, device_system_metrics);
 191 }
 192
 193 void init_device_tty(void)
 194 {
 195 #ifdef SIGWINCH
 196         if (initialized && !noninteractive)
 197                 signal(SIGWINCH, tty_device_size_change_signal);
 198 #endif                          /* SIGWINCH */
 199 }