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comparison src/device-tty.c @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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children ed498ef2108b
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427:0a0253eac470 428:3ecd8885ac67
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 XEmacs.
7
8 XEmacs is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
11 later version.
12
13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with XEmacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* Synched up with: Not in FSF. */
24
25 /* Authors: Ben Wing and Chuck Thompson. */
26
27 #include <config.h>
28 #include "lisp.h"
29
30 #include "console-tty.h"
31 #include "console-stream.h"
32 #include "events.h"
33 #include "faces.h"
34 #include "frame.h"
35 #include "lstream.h"
36 #include "redisplay.h"
37 #include "sysdep.h"
38
39 #include "syssignal.h" /* for SIGWINCH */
40
41 #include <errno.h>
42
43 Lisp_Object Qinit_pre_tty_win, Qinit_post_tty_win;
44
45
46 static void
47 allocate_tty_device_struct (struct device *d)
48 {
49 d->device_data = xnew_and_zero (struct tty_device);
50 }
51
52 static void
53 tty_init_device (struct device *d, Lisp_Object props)
54 {
55 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
56 Lisp_Object terminal_type = CONSOLE_TTY_DATA (con)->terminal_type;
57
58 DEVICE_INFD (d) = CONSOLE_TTY_DATA (con)->infd;
59 DEVICE_OUTFD (d) = CONSOLE_TTY_DATA (con)->outfd;
60
61 allocate_tty_device_struct (d);
62 init_baud_rate (d);
63
64 switch (init_tty_for_redisplay (d, (char *) XSTRING_DATA (terminal_type)))
65 {
66 #if 0
67 case TTY_UNABLE_OPEN_DATABASE:
68 suppress_early_error_handler_backtrace = 1;
69 error ("Can't access terminal information database");
70 break;
71 #endif
72 case TTY_TYPE_UNDEFINED:
73 suppress_early_error_handler_backtrace = 1;
74 error ("Terminal type `%s' undefined (or can't access database?)",
75 XSTRING_DATA (terminal_type));
76 break;
77 case TTY_TYPE_INSUFFICIENT:
78 suppress_early_error_handler_backtrace = 1;
79 error ("Terminal type `%s' not powerful enough to run Emacs",
80 XSTRING_DATA (terminal_type));
81 break;
82 case TTY_SIZE_UNSPECIFIED:
83 suppress_early_error_handler_backtrace = 1;
84 error ("Can't determine window size of terminal");
85 break;
86 case TTY_INIT_SUCCESS:
87 break;
88 default:
89 abort ();
90 }
91
92 init_one_device (d);
93
94 /* Run part of the elisp side of the TTY device initialization.
95 The post-init is run in the tty_after_init_frame() method. */
96 call0 (Qinit_pre_tty_win);
97 }
98
99 static void
100 free_tty_device_struct (struct device *d)
101 {
102 struct tty_device *td = (struct tty_device *) d->device_data;
103 if (td)
104 xfree (td);
105 }
106
107 static void
108 tty_delete_device (struct device *d)
109 {
110 free_tty_device_struct (d);
111 }
112
113 #ifdef SIGWINCH
114
115 static SIGTYPE
116 tty_device_size_change_signal (int signo)
117 {
118 int old_errno = errno;
119 asynch_device_change_pending++;
120 #ifdef HAVE_UNIXOID_EVENT_LOOP
121 signal_fake_event ();
122 #endif
123 EMACS_REESTABLISH_SIGNAL (SIGWINCH, tty_device_size_change_signal);
124 errno = old_errno;
125 SIGRETURN;
126 }
127
128 /* frame_change_signal does nothing but set a flag that it was called.
129 When redisplay is called, it will notice that the flag is set and
130 call handle_pending_device_size_change to do the actual work. */
131 static void
132 tty_asynch_device_change (void)
133 {
134 Lisp_Object devcons, concons;
135
136 DEVICE_LOOP_NO_BREAK (devcons, concons)
137 {
138 int width, height;
139 Lisp_Object tail;
140 struct device *d = XDEVICE (XCAR (devcons));
141 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
142
143 if (!DEVICE_TTY_P (d))
144 continue;
145
146 get_tty_device_size (d, &width, &height);
147 if (width > 0 && height > 0
148 && (CONSOLE_TTY_DATA (con)->width != width
149 || CONSOLE_TTY_DATA (con)->height != height))
150 {
151 CONSOLE_TTY_DATA (con)->width = width;
152 CONSOLE_TTY_DATA (con)->height = height;
153
154 for (tail = DEVICE_FRAME_LIST (d);
155 !NILP (tail);
156 tail = XCDR (tail))
157 {
158 struct frame *f = XFRAME (XCAR (tail));
159
160 /* We know the frame is tty because we made sure that the
161 device is tty. */
162 change_frame_size (f, height, width, 1);
163 }
164 }
165 }
166 }
167
168 #endif /* SIGWINCH */
169
170 static Lisp_Object
171 tty_device_system_metrics (struct device *d,
172 enum device_metrics m)
173 {
174 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
175 switch (m)
176 {
177 case DM_size_device:
178 return Fcons (make_int (CONSOLE_TTY_DATA (con)->width),
179 make_int (CONSOLE_TTY_DATA (con)->height));
180 default: /* No such device metric property for TTY devices */
181 return Qunbound;
182 }
183 }
184
185 /************************************************************************/
186 /* initialization */
187 /************************************************************************/
188
189 void
190 syms_of_device_tty (void)
191 {
192 defsymbol (&Qinit_pre_tty_win, "init-pre-tty-win");
193 defsymbol (&Qinit_post_tty_win, "init-post-tty-win");
194 }
195
196 void
197 console_type_create_device_tty (void)
198 {
199 /* device methods */
200 CONSOLE_HAS_METHOD (tty, init_device);
201 CONSOLE_HAS_METHOD (tty, delete_device);
202 #ifdef SIGWINCH
203 CONSOLE_HAS_METHOD (tty, asynch_device_change);
204 #endif /* SIGWINCH */
205 CONSOLE_HAS_METHOD (tty, device_system_metrics);
206 }
207
208 void
209 init_device_tty (void)
210 {
211 #ifdef SIGWINCH
212 if (initialized && !noninteractive)
213 signal (SIGWINCH, tty_device_size_change_signal);
214 #endif /* SIGWINCH */
215 }