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) 1995-1999 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /* LINTLIBRARY */
30
31 /*
32 * newterm.c
33 *
34 * XCurses Library
35 *
36 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
37 *
38 */
39
40 #ifdef M_RCSID
41 #ifndef lint
42 static char const rcsID[] =
43 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
44 "libxcurses/src/libc/xcurses/rcs/newterm.c 1.13 1998/06/04 19:55:52 "
45 "cbates Exp $";
46 #endif
47 #endif
48
49 #include <sys/isa_defs.h>
50 #include <private.h>
51 #include <m_wio.h>
52 #include <errno.h>
53 #include <signal.h>
54 #include <stdlib.h>
55 #include <string.h>
56
57 int LINES, COLS;
58 int COLORS, COLOR_PAIRS;
59
60 WINDOW *curscr;
61 WINDOW *stdscr;
62 SCREEN *__m_screen;
63
64 static short assume_one_line = FALSE;
65
66 /*
67 * Assume terminal has only one screen line by restricting those
68 * capabilities that assume more than one line. This function must
69 * be called before initscr() or newterm().
70 *
71 * This flag will reset after initscr() or newterm() so that subsequent
72 * calls to newterm(), without a preceding call to filter(), will load
73 * an unmodified terminal. THIS IS NOT HISTORICAL PRACTICE, BUT DEEMED
74 * USEFUL.
75 */
76 void
filter(void)77 filter(void)
78 {
79 assume_one_line = TRUE;
80 }
81
82 /*
83 * SIGTSTP Handler.
84 */
85 /* ARGSUSED */
86 void
tstp(int signo)87 tstp(int signo)
88 {
89 #ifdef SIGTSTP
90 /*
91 * Only permit SIGTSTP if the curent process is the process
92 * group leader. If the process is not the current group
93 * leader, then suspending the current process will suspend
94 * other members of the process group, such as the parent
95 * process.
96 */
97 if (getpid() == getpgrp()) {
98 (void) endwin();
99
100 #ifdef SIG_UNBLOCK
101 {
102 sigset_t unblock;
103
104 (void) sigemptyset(&unblock);
105 (void) sigaddset(&unblock, SIGTSTP);
106 (void) sigprocmask(SIG_UNBLOCK, &unblock,
107 (sigset_t *) 0);
108 }
109 #endif /* SIG_UNBLOCK */
110 (void) signal(SIGTSTP, SIG_DFL);
111 (void) kill(0, SIGTSTP);
112 } else {
113 (void) beep();
114 }
115
116 (void) signal(SIGTSTP, tstp);
117 (void) wrefresh(curscr);
118 #else /* no SIGTSTP */
119 (void) beep();
120 #endif /* SIGTSTP */
121 }
122
123 int __m_slk_format = -1;
124
125 /*
126 * Do real soft label key initialisation once setupterm() have been called
127 * to load the current terminal. Determine whether the terminal supplies
128 * soft label keys, or whether we have to fake it by using the last line
129 * of a terminal screen.
130 */
131 /* ARGSUSED */
132 int
__m_slk_init(SCREEN * sp,int style)133 __m_slk_init(SCREEN *sp, int style)
134 {
135 int code;
136
137 code = ERR;
138
139 (void) memset(&sp->_slk, 0, sizeof (sp->_slk));
140
141 /* Does the terminal have a method to program the soft label key? */
142 if (plab_norm != NULL || pkey_plab != NULL) {
143 code = OK;
144 goto done;
145 }
146
147 /* We have to fake it. */
148 if (lines < 2)
149 goto done;
150
151 sp->_slk._w = subwin(sp->_newscr, 1, 0, lines-1, 0);
152 if (sp->_slk._w == NULL)
153 goto done;
154
155 /* Test suite seems to expect this */
156 (void) wattrset(sp->_slk._w, A_DIM|A_REVERSE);
157 (void) ripoffline(-1, 0);
158 code = OK;
159 done:
160 return (code);
161 }
162
163 /*
164 * The XCurses specification is unclear how ripoffline() would
165 * affect newterm(). We assume that it can't be used with newterm()
166 * and that it only affects initscr(), which is responsible for
167 * creating stdscr.
168 */
169 t_rip rip = { 0 };
170
171 /*
172 * If line is positive (1), one line is removed from the beginning of
173 * stdscr; else if line is negative (-1), one line is removed from the end.
174 */
175 int
ripoffline(int line,int (* init)(WINDOW *,int))176 ripoffline(int line, int (*init)(WINDOW *, int))
177 {
178 int i;
179
180 i = rip.top - rip.bottom;
181
182 if (line != 0 && i < M_CURSES_MAX_RIPOFFLINE) {
183 rip.line[i].init = init;
184 if (line < 0)
185 rip.line[i].dy = --rip.bottom;
186 else
187 rip.line[i].dy = rip.top++;
188 }
189
190 return (OK);
191 }
192
193 /*
194 * Create a new terminal screen. Used if a program is going to be sending
195 * output to more than one terminal. It returns a SCREEN* for the terminal.
196 * The parameters are a terminal name, output FILE*, and input FILE*. If
197 * the terminal name is null then $TERM is used. The program must also
198 * call endwin() for each terminal being used before exiting from curses.
199 * If newterm() is called more than once for the same terminal, the first
200 * terminal referred to must be the last one for which endwin() is called.
201 */
202 SCREEN *
newterm(char * term,FILE * out_fp,FILE * in_fp)203 newterm(char *term, FILE *out_fp, FILE *in_fp)
204 {
205 WINDOW *w;
206 t_wide_io *wio;
207 SCREEN *sp, *osp;
208 int i, n, y, errret;
209
210 /*
211 * Input stream should be unbuffered so that m_tfgetc() works
212 * correctly on BSD and SUN systems.
213 */
214 (void) setvbuf(in_fp, (char *) 0, _IONBF, BUFSIZ);
215 #if 0
216 /*
217 * Not sure whether we really want to concern ourselves with the output
218 * buffer scheme. Might be best to leave it upto the application to
219 * deal with buffer schemes and when to perform flushes.
220 *
221 * MKS Vi uses MKS Curses and so must support the ability to switch in
222 * and out of Curses mode when switching from Vi to Ex and back.
223 * Problem is that in Vi mode you would prefer full buffered output to
224 * give updates a smoother appearance and Ex mode you require line
225 * buffered in order to see prompts and messages.
226 */
227 (void) setvbuf(out_fp, (char *) 0, _IOLBF, BUFSIZ);
228 #endif
229 errno = 0;
230
231 if (__m_setupterm(term, fileno(in_fp), fileno(out_fp), &errret)
232 == ERR) {
233 switch (errret) {
234 case -1:
235 errno = ENOMEM;
236 break;
237 case 2:
238 errno = ENAMETOOLONG;
239 break;
240 case 0:
241 default:
242 errno = ENOENT;
243 break;
244 }
245 goto error1;
246 }
247
248 if (__m_doupdate_init())
249 goto error1;
250
251 if ((sp = (SCREEN *) calloc(1, sizeof (*sp))) == NULL)
252 goto error1;
253
254 sp->_kfd = -1;
255 sp->_if = in_fp;
256 sp->_of = out_fp;
257 sp->_term = cur_term;
258
259 sp->_unget._size = __m_decode_init((t_decode **) &sp->_decode);
260
261 /*
262 * Maximum length of a multbyte key sequence, including
263 * multibyte characters and terminal function keys.
264 */
265 if (sp->_unget._size < (M_TYPEAHEAD_SIZE + MB_LEN_MAX))
266 sp->_unget._size = M_TYPEAHEAD_SIZE + MB_LEN_MAX;
267
268 sp->_unget._stack = calloc((size_t) sp->_unget._size,
269 sizeof (*sp->_unget._stack));
270 if (sp->_unget._stack == NULL)
271 goto error2;
272
273 if ((wio = (t_wide_io *) calloc(1, sizeof (*wio))) == NULL)
274 goto error2;
275
276 /* Setup wide input for XCurses. */
277 wio->get = (int (*)(void *)) wgetch;
278 wio->unget = __xc_ungetc;
279 wio->reset = __xc_clearerr;
280 wio->iserror = __xc_ferror;
281 wio->iseof = __xc_feof;
282 sp->_in = wio;
283
284 if (assume_one_line) {
285 /* Assume only one line. */
286 lines = 1;
287
288 /* Disable capabilities that assume more than one line. */
289 clear_screen = clr_eos = cursor_up = cursor_down = NULL;
290 cursor_home = cursor_to_ll = cursor_address = NULL;
291 row_address = parm_up_cursor = parm_down_cursor = NULL;
292
293 /* Re-evaluate the cursor motion costs. */
294 __m_mvcur_cost();
295
296 /* Reset flag for subsequent calls to newterm(). */
297 assume_one_line = FALSE;
298 }
299
300 if ((sp->_curscr = newwin(lines, columns, 0, 0)) == NULL)
301 goto error2;
302
303 if ((sp->_newscr = newwin(lines, columns, 0, 0)) == NULL)
304 goto error2;
305
306 #if defined(_LP64)
307 sp->_hash = (unsigned int *) calloc(lines, sizeof (*sp->_hash));
308 #else
309 sp->_hash = (unsigned long *) calloc(lines, sizeof (*sp->_hash));
310 #endif
311 if (sp->_hash == NULL)
312 goto error2;
313
314 if (0 <= __m_slk_format && __m_slk_init(sp, __m_slk_format) == ERR) {
315 goto error2;
316 }
317
318 /*
319 * doupdate() will perform the final screen preparations like
320 * enter_ca_mode, reset_prog_mode() (to assert the termios
321 * changes), etc.
322 */
323 sp->_flags |= S_ENDWIN;
324
325 #ifdef SIGTSTP
326 (void) signal(SIGTSTP, tstp);
327 #endif
328 /* Assert that __m_screen is set to the new terminal. */
329 osp = set_term(sp);
330
331 /* Disable echo in tty driver, Curses does software echo. */
332 PTERMIOS(_prog)->c_lflag &= ~ECHO;
333
334 /* Enable mappnig of cr -> nl on input and nl -> crlf on output. */
335 PTERMIOS(_prog)->c_iflag |= ICRNL;
336 PTERMIOS(_prog)->c_oflag |= OPOST;
337 #ifdef ONLCR
338 PTERMIOS(_prog)->c_oflag |= ONLCR;
339 #endif
340 cur_term->_flags |= __TERM_NL_IS_CRLF;
341
342 #ifdef TAB0
343 /* Use real tabs. */
344 PTERMIOS(_prog)->c_oflag &= ~(TAB1|TAB2|TAB3);
345 #endif
346
347 /*
348 * Default to 'cbreak' mode as per
349 * test /tset/CAPIxcurses/fcbreak/fcbreak1{4}
350 */
351 cur_term->_flags &= ~__TERM_HALF_DELAY;
352
353 /*
354 * Default to 'idcok' mode as per
355 * test /tset/CAPIxcurses/fidcok/fidcok1{3}
356 */
357 __m_screen->_flags |= S_INS_DEL_CHAR;
358
359 PTERMIOS(_prog)->c_cc[VMIN] = 1;
360 PTERMIOS(_prog)->c_cc[VTIME] = 0;
361 PTERMIOS(_prog)->c_lflag &= ~ICANON;
362
363 (void) __m_tty_set_prog_mode();
364 (void) __m_set_echo(1);
365 (void) typeahead(fileno(in_fp));
366
367 (void) __m_slk_clear(1);
368
369 n = rip.top - rip.bottom;
370 if (stdscr == NULL) {
371 stdscr = newwin(lines - n, 0, rip.top, 0);
372 if (stdscr == NULL)
373 goto error3;
374 }
375 /*
376 * Create and initialise ripped off line windows.
377 * It is the application's responsiblity to free the
378 * windows when the application terminates.
379 */
380 for (i = 0; i < n; ++i) {
381 if (rip.line[i].created)
382 continue;
383 y = rip.line[i].dy;
384 if (y < 0)
385 y += lines;
386
387 w = newwin(1, 0, y, 0);
388 if (rip.line[i].init != (int (*)(WINDOW *, int)) 0)
389 (void) (*rip.line[i].init)(w, columns);
390 rip.line[i].created = 1;
391 }
392 LINES = stdscr->_maxy = sp->_curscr->_maxy - n;
393
394 return (sp);
395 error3:
396 (void) set_term(osp);
397 error2:
398 delscreen(sp);
399 error1:
400 return (NULL);
401 }
402
403 /*
404 * Free storage associated with a screen structure.
405 * NOTE endwin() does not do this.
406 */
407 void
delscreen(SCREEN * sp)408 delscreen(SCREEN *sp)
409 {
410 if (sp != NULL) {
411 if (sp->_slk._w != NULL)
412 (void) delwin(sp->_slk._w);
413
414 (void) delwin(sp->_newscr);
415 (void) delwin(sp->_curscr);
416 (void) del_curterm(sp->_term);
417
418 __m_decode_free((t_decode **) &sp->_decode);
419
420 if (sp->_hash != NULL)
421 free(sp->_hash);
422
423 if (sp->_unget._stack != NULL)
424 free(sp->_unget._stack);
425
426 if (sp->_in != NULL)
427 free(sp->_in);
428
429 free(sp);
430 }
431 }
432
433 /*
434 * Switch current terminal for Curses layer.
435 */
436 SCREEN *
set_term(SCREEN * screen)437 set_term(SCREEN *screen)
438 {
439 SCREEN *osp = __m_screen;
440
441 if (screen != NULL) {
442 (void) set_curterm(screen->_term);
443 curscr = screen->_curscr;
444 __m_screen = screen;
445
446 LINES = lines;
447 COLS = columns;
448 COLORS = max_colors;
449 COLOR_PAIRS = max_pairs;
450 }
451
452 return (osp);
453 }
454
455 int
typeahead(int fd)456 typeahead(int fd)
457 {
458 __m_screen->_flags &= ~S_ISATTY;
459 if (fd != -1) {
460 if (isatty(fd)) {
461 __m_screen->_kfd = fd;
462 __m_screen->_flags |= S_ISATTY;
463 } else {
464 __m_screen->_kfd = -1;
465 }
466 }
467
468 return (OK);
469 }
470
471 int
__m_set_echo(int bf)472 __m_set_echo(int bf)
473 {
474 int old;
475
476 old = (__m_screen->_flags & S_ECHO) == S_ECHO;
477
478 __m_screen->_flags &= ~S_ECHO;
479 if (bf)
480 __m_screen->_flags |= S_ECHO;
481
482 return (old);
483 }
484