1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1995, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * newterm.c
31 *
32 * XCurses Library
33 *
34 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
35 *
36 */
37
38 #ifdef M_RCSID
39 #ifndef lint
40 static char const rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/newterm.c 1.15 1995/07/25 19:54:00 ant Exp $";
41 #endif
42 #endif
43
44 #include <private.h>
45 #include <m_wio.h>
46 #include <errno.h>
47 #include <signal.h>
48 #include <stdlib.h>
49 #include <string.h>
50
51 int LINES, COLS;
52 int COLORS, COLOR_PAIRS;
53
54 WINDOW *curscr;
55 WINDOW *stdscr;
56 SCREEN *__m_screen;
57
58 static short assume_one_line = FALSE;
59
60 /*
61 * Assume terminal has only one screen line by restricting those
62 * capabilities that assume more than one line. This function must
63 * be called before initscr() or newterm().
64 *
65 * This flag will reset after initscr() or newterm() so that subsequent
66 * calls to newterm(), without a preceding call to filter(), will load
67 * an unmodified terminal. THIS IS NOT HISTORICAL PRACTICE, BUT DEEMED
68 * USEFUL.
69 */
70 void
filter(void)71 filter(void)
72 {
73 #ifdef M_CURSES_TRACE
74 __m_trace("filter(void)");
75 #endif
76 assume_one_line = TRUE;
77 __m_return_void("filter");
78 }
79
80 /*f
81 * SIGTSTP Handler.
82 */
83 void
tstp(signo)84 tstp(signo)
85 int signo;
86 {
87 #ifdef SIGTSTP
88 /* Only permit SIGTSTP if the curent process is the process
89 * group leader. If the process is not the current group
90 * leader, then suspending the current process will suspend
91 * other members of the process group, such as the parent
92 * process.
93 */
94 if (getpid() == getpgrp()) {
95 (void) endwin();
96
97 #ifdef SIG_UNBLOCK
98 {
99 sigset_t unblock;
100
101 (void) sigemptyset(&unblock);
102 (void) sigaddset(&unblock, SIGTSTP);
103 (void) sigprocmask(SIG_UNBLOCK, &unblock, (sigset_t *) 0);
104 }
105 #endif /* SIG_UNBLOCK */
106 (void) signal(SIGTSTP, SIG_DFL);
107 (void) kill(0, SIGTSTP);
108 } else {
109 (void) beep();
110 }
111
112 (void) signal(SIGTSTP, tstp);
113 (void) wrefresh(curscr);
114 #else /* no SIGTSTP */
115 (void) beep();
116 #endif /* SIGTSTP */
117 }
118
119 int __m_slk_format = -1;
120
121 /*
122 * Do real soft label key initialisation once setupterm() have been called
123 * to load the current terminal. Determine whether the terminal supplies
124 * soft label keys, or whether we have to fake it by using the last line
125 * of a terminal screen.
126 */
127 int
__m_slk_init(SCREEN * sp,int style)128 __m_slk_init(SCREEN *sp, int style)
129 {
130 int code;
131
132 #ifdef M_CURSES_TRACE
133 __m_trace("__m_slk_init(%d)", style );
134 #endif
135
136 code = ERR;
137
138 /* Does the terminal have a method to program the soft label key? */
139 if (plab_norm != (char *) 0 || pkey_plab != (char *) 0) {
140 code = OK;
141 goto done;
142 }
143
144 /* We have to fake it. */
145 if (lines < 2)
146 goto done;
147
148 sp->_slk._w = subwin(sp->_newscr, 1, 0, --lines, 0);
149 if (sp->_slk._w == (WINDOW *) 0)
150 goto done;
151
152 code = OK;
153 done:
154 return __m_return_code("__m_slk_init", code);
155 }
156
157 /*
158 * The XCurses specification is unclear how ripoffline() would
159 * affect newterm(). We assume that it can't be used with newterm()
160 * and that it only affects initscr(), which is responsible for
161 * creating stdscr.
162 */
163 static t_rip rip = { 0 };
164
165 /*
166 * If line is positive (1), one line is removed from the beginning of
167 * stdscr; else if line is negative (-1), one line is removed from the end.
168 */
169 int
ripoffline(int line,int (* init)(WINDOW *,int))170 ripoffline(int line, int (*init)(WINDOW *, int))
171 {
172 int i;
173
174 #ifdef M_CURSES_TRACE
175 __m_trace("ripoffline(%d, %p)", line, init);
176 #endif
177
178 i = rip.top - rip.bottom;
179
180 if (line != 0 && i + 1 < M_CURSES_MAX_RIPOFFLINE) {
181 rip.line[i].init = init;
182 if (line < 0)
183 rip.line[i].dy = --rip.bottom;
184 else
185 rip.line[i].dy = ++rip.top;
186 }
187
188 return __m_return_code("ripoffline", OK);
189 }
190
191 /*f
192 * Create a new terminal screen. Used if a program is going to be sending
193 * output to more than one terminal. It returns a SCREEN* for the terminal.
194 * The parameters are a terminal name, output FILE*, and input FILE*. If
195 * the terminal name is null then $TERM is used. The program must also
196 * call endwin() for each terminal being used before exiting from curses.
197 * If newterm() is called more than once for the same terminal, the first
198 * terminal referred to must be the last one for which endwin() is called.
199 */
200 SCREEN *
newterm(term,out_fp,in_fp)201 newterm(term, out_fp, in_fp)
202 char *term;
203 FILE *out_fp, *in_fp;
204 {
205 WINDOW *w;
206 t_wide_io *wio;
207 SCREEN *sp, *osp;
208 int i, n, y, errret;
209
210 #ifdef M_CURSES_TRACE
211 __m_trace(
212 "newterm(%s, %p, %p)",
213 term == (char *) 0 ? "NULL" : term, out_fp, in_fp
214 );
215 #endif
216
217 /* Input stream should be unbuffered so that m_tfgetc() works
218 * correctly on BSD and SUN systems.
219 */
220 (void) SETVBUF(in_fp, (char *) 0, _IONBF, BUFSIZ);
221 #if 0
222 /*
223 * Not sure whether we really want to concern ourselves with the output
224 * buffer scheme. Might be best to leave it upto the application to
225 * deal with buffer schemes and when to perform flushes.
226 *
227 * MKS Vi uses MKS Curses and so must support the ability to switch in
228 * and out of Curses mode when switching from Vi to Ex and back.
229 * Problem is that in Vi mode you would prefer full buffered output to
230 * give updates a smoother appearance and Ex mode you require line
231 * buffered in order to see prompts and messages.
232 */
233 (void) SETVBUF(out_fp, (char *) 0, _IOLBF, BUFSIZ);
234 #endif
235 errno = 0;
236
237 if (__m_setupterm(term, fileno(in_fp), fileno(out_fp), &errret)==ERR) {
238 switch (errret) {
239 case -1:
240 errno = ENOMEM;
241 break;
242 case 2:
243 errno = ENAMETOOLONG;
244 break;
245 case 0:
246 default:
247 errno = ENOENT;
248 break;
249 }
250 goto error1;
251 }
252
253 if (__m_doupdate_init())
254 goto error1;
255
256 if ((sp = (SCREEN *) calloc(1, sizeof *sp)) == (SCREEN *) 0)
257 goto error1;
258
259 sp->_if = in_fp;
260 sp->_of = out_fp;
261 sp->_term = cur_term;
262
263 sp->_unget._size = __m_decode_init((t_decode **) &sp->_decode);
264
265 /* Maximum length of a multbyte key sequence, including
266 * multibyte characters and terminal function keys.
267 */
268 if (sp->_unget._size < MB_LEN_MAX)
269 sp->_unget._size = MB_LEN_MAX;
270
271 sp->_unget._stack = calloc(
272 (size_t) sp->_unget._size, sizeof *sp->_unget._stack
273 );
274 if (sp->_unget._stack == (void *) 0)
275 goto error2;
276
277 if ((wio = (t_wide_io *) calloc(1, sizeof *wio)) == (t_wide_io *) 0)
278 goto error2;
279
280 /* Setup wide input for XCurses. */
281 wio->get = (int (*)(void *)) wgetch;
282 wio->unget = __xc_ungetc;
283 wio->reset = __xc_clearerr;
284 wio->iserror = __xc_ferror;
285 wio->iseof = __xc_feof;
286 sp->_in = wio;
287
288 if (assume_one_line) {
289 /* Assume only one line. */
290 lines = 1;
291
292 /* Disable capabilities that assume more than one line. */
293 clear_screen =
294 clr_eos =
295 cursor_up =
296 cursor_down =
297 cursor_home =
298 cursor_to_ll =
299 cursor_address =
300 row_address =
301 parm_up_cursor =
302 parm_down_cursor = (char *) 0;
303
304 /* Re-evaluate the cursor motion costs. */
305 __m_mvcur_cost();
306
307 /* Reset flag for subsequent calls to newterm(). */
308 assume_one_line = FALSE;
309 }
310
311 if ((sp->_curscr = newwin(lines, columns, 0, 0)) == (WINDOW *) 0)
312 goto error2;
313
314 if ((sp->_newscr = newwin(lines, columns, 0, 0)) == (WINDOW *) 0)
315 goto error2;
316
317 sp->_hash = (unsigned long *) calloc(lines, sizeof *sp->_hash);
318 if (sp->_hash == (unsigned long *) 0)
319 goto error2;
320
321 if (0 <= __m_slk_format && __m_slk_init(sp, __m_slk_format) == ERR)
322 goto error2;
323
324 /* doupdate() will perform the final screen preparations like
325 * enter_ca_mode, reset_prog_mode() (to assert the termios
326 * changes), etc.
327 */
328 sp->_flags |= S_ENDWIN;
329
330 #ifdef SIGTSTP
331 (void) signal(SIGTSTP, tstp);
332 #endif
333 /* Assert that __m_screen is set to the new terminal. */
334 osp = set_term(sp);
335
336 /* Disable echo in tty driver, Curses does software echo. */
337 cur_term->_prog.c_lflag &= ~ECHO;
338
339 /* Enable mappnig of cr -> nl on input and nl -> crlf on output. */
340 cur_term->_prog.c_iflag |= ICRNL;
341 cur_term->_prog.c_oflag |= OPOST;
342 #ifdef ONLCR
343 cur_term->_prog.c_oflag |= ONLCR;
344 #endif
345 cur_term->_flags |= __TERM_NL_IS_CRLF;
346
347 #ifdef TAB0
348 /* Use real tabs. */
349 cur_term->_prog.c_oflag &= ~(TAB1|TAB2|TAB3);
350 #endif
351
352 (void) __m_tty_set(&cur_term->_prog);
353 (void) __m_set_echo(1);
354 (void) typeahead(fileno(in_fp));
355
356 if (stdscr == (WINDOW *) 0) {
357 n = rip.top - rip.bottom;
358 stdscr = newwin(lines - n, 0, rip.top, 0);
359 if (stdscr == (WINDOW *) 0)
360 goto error3;
361
362 /* Create and initialise ripped off line windows.
363 * It is the application's responsiblity to free the
364 * windows when the application terminates.
365 */
366 for (i = 0; i < n; ++i) {
367 y = rip.line[i].dy;
368 if (y < 0)
369 y += lines;
370
371 w = newwin(1, 0, y, 0);
372 if (rip.line[i].init != (int (*)(WINDOW *, int)) 0)
373 (void) (*rip.line[i].init)(w, columns);
374 }
375 }
376
377 return __m_return_pointer("newterm", sp);
378 error3:
379 (void) set_term(osp);
380 error2:
381 delscreen(sp);
382 error1:
383 return __m_return_pointer("newterm", (SCREEN *) 0);
384 }
385
386 /*f
387 * Free storage associated with a screen structure.
388 * NOTE endwin() does not do this.
389 */
390 void
delscreen(sp)391 delscreen(sp)
392 SCREEN *sp;
393 {
394 #ifdef M_CURSES_TRACE
395 __m_trace("delscreen(%p)", sp);
396 #endif
397
398 if (sp != (SCREEN *) 0) {
399 if (sp->_slk._w != (WINDOW *) 0)
400 (void) delwin(sp->_slk._w);
401
402 (void) delwin(sp->_newscr);
403 (void) delwin(sp->_curscr);
404 (void) del_curterm(sp->_term);
405
406 __m_decode_free((t_decode **) &sp->_decode);
407
408 if (sp->_hash != (unsigned long *) 0)
409 free(sp->_hash);
410
411 if (sp->_unget._stack != (int *) 0)
412 free(sp->_unget._stack);
413
414 if (sp->_in != (void *) 0)
415 free(sp->_in);
416
417 free(sp);
418 }
419
420 __m_return_void("delscreen");
421 }
422
423 /*f
424 * Switch current terminal for Curses layer.
425 */
426 SCREEN *
set_term(screen)427 set_term(screen)
428 SCREEN *screen;
429 {
430 SCREEN *osp = __m_screen;
431
432 #ifdef M_CURSES_TRACE
433 __m_trace("set_term(%p)", screen);
434 #endif
435 if (screen != (SCREEN *) 0) {
436 (void) set_curterm(screen->_term);
437 curscr = screen->_curscr;
438 __m_screen = screen;
439
440 LINES = lines;
441 COLS = columns;
442 COLORS = max_colors;
443 COLOR_PAIRS = max_pairs;
444 }
445
446 return __m_return_pointer("set_term", osp);
447 }
448
449 int
typeahead(fd)450 typeahead(fd)
451 int fd;
452 {
453 #ifdef M_CURSES_TRACE
454 __m_trace("typeahead(%d)", fd);
455 #endif
456
457 __m_screen->_kfd = fd;
458 __m_screen->_flags &= ~S_ISATTY;
459
460 if (fd != -1 && isatty(fd))
461 __m_screen->_flags |= S_ISATTY;
462
463 return __m_return_code("typeahead", OK);
464 }
465
466 int
__m_set_echo(bf)467 __m_set_echo(bf)
468 int bf;
469 {
470 int old;
471
472 old = (__m_screen->_flags & S_ECHO) == S_ECHO;
473
474 __m_screen->_flags &= ~S_ECHO;
475 if (bf)
476 __m_screen->_flags |= S_ECHO;
477
478 return old;
479 }
480
481