1 /****************************************************************************
2 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 ****************************************************************************/
34
35 /*
36 ** lib_set_term.c
37 **
38 ** The routine set_term().
39 **
40 */
41
42 #include <curses.priv.h>
43
44 #include <term.h> /* cur_term */
45 #include <tic.h>
46
47 MODULE_ID("$Id: lib_set_term.c,v 1.85 2005/01/22 17:36:01 tom Exp $")
48 #ifdef __MirBSD__
49 __RCSID("$MirOS: src/lib/libncurses/src/ncurses/base/lib_set_term.c,v 1.5 2009/09/06 13:46:35 tg Exp $");
50 #endif
51
52 NCURSES_EXPORT(SCREEN *)
set_term(SCREEN * screenp)53 set_term(SCREEN *screenp)
54 {
55 SCREEN *oldSP;
56
57 T((T_CALLED("set_term(%p)"), screenp));
58
59 oldSP = SP;
60 _nc_set_screen(screenp);
61
62 set_curterm(SP->_term);
63 curscr = SP->_curscr;
64 newscr = SP->_newscr;
65 stdscr = SP->_stdscr;
66 COLORS = SP->_color_count;
67 COLOR_PAIRS = SP->_pair_count;
68
69 T((T_RETURN("%p"), oldSP));
70 return (oldSP);
71 }
72
73 static void
_nc_free_keytry(struct tries * kt)74 _nc_free_keytry(struct tries *kt)
75 {
76 if (kt != 0) {
77 _nc_free_keytry(kt->child);
78 _nc_free_keytry(kt->sibling);
79 free(kt);
80 }
81 }
82
83 /*
84 * Free the storage associated with the given SCREEN sp.
85 */
86 NCURSES_EXPORT(void)
delscreen(SCREEN * sp)87 delscreen(SCREEN *sp)
88 {
89 SCREEN **scan = &_nc_screen_chain;
90 int i;
91
92 T((T_CALLED("delscreen(%p)"), sp));
93
94 while (*scan) {
95 if (*scan == sp) {
96 *scan = sp->_next_screen;
97 break;
98 }
99 scan = &(*scan)->_next_screen;
100 }
101
102 (void) _nc_freewin(sp->_curscr);
103 (void) _nc_freewin(sp->_newscr);
104 (void) _nc_freewin(sp->_stdscr);
105
106 if (sp->_slk != 0) {
107 if (sp->_slk->ent != 0) {
108 for (i = 0; i < sp->_slk->labcnt; ++i) {
109 FreeIfNeeded(sp->_slk->ent[i].ent_text);
110 FreeIfNeeded(sp->_slk->ent[i].form_text);
111 }
112 free(sp->_slk->ent);
113 }
114 free(sp->_slk);
115 sp->_slk = 0;
116 }
117
118 _nc_free_keytry(sp->_keytry);
119 sp->_keytry = 0;
120
121 _nc_free_keytry(sp->_key_ok);
122 sp->_key_ok = 0;
123
124 FreeIfNeeded(sp->_current_attr);
125
126 FreeIfNeeded(sp->_color_table);
127 FreeIfNeeded(sp->_color_pairs);
128
129 FreeIfNeeded(sp->oldhash);
130 FreeIfNeeded(sp->newhash);
131 FreeIfNeeded(sp->hashtab);
132
133 del_curterm(sp->_term);
134
135 /*
136 * If the associated output stream has been closed, we can discard the
137 * set-buffer. Limit the error check to EBADF, since fflush may fail
138 * for other reasons than trying to operate upon a closed stream.
139 */
140 if (sp->_ofp != 0
141 && sp->_setbuf != 0
142 && fflush(sp->_ofp) != 0
143 && errno == EBADF) {
144 free(sp->_setbuf);
145 }
146
147 free(sp);
148
149 /*
150 * If this was the current screen, reset everything that the
151 * application might try to use (except cur_term, which may have
152 * multiple references in different screens).
153 */
154 if (sp == SP) {
155 curscr = 0;
156 newscr = 0;
157 stdscr = 0;
158 COLORS = 0;
159 COLOR_PAIRS = 0;
160 _nc_set_screen(0);
161 }
162 returnVoid;
163 }
164
165 static ripoff_t rippedoff[5];
166 static ripoff_t *rsp = rippedoff;
167 #define N_RIPS SIZEOF(SP->_rippedoff)
168
169 static bool
no_mouse_event(SCREEN * sp GCC_UNUSED)170 no_mouse_event(SCREEN *sp GCC_UNUSED)
171 {
172 return FALSE;
173 }
174
175 static bool
no_mouse_inline(SCREEN * sp GCC_UNUSED)176 no_mouse_inline(SCREEN *sp GCC_UNUSED)
177 {
178 return FALSE;
179 }
180
181 static bool
no_mouse_parse(int code GCC_UNUSED)182 no_mouse_parse(int code GCC_UNUSED)
183 {
184 return TRUE;
185 }
186
187 static void
no_mouse_resume(SCREEN * sp GCC_UNUSED)188 no_mouse_resume(SCREEN *sp GCC_UNUSED)
189 {
190 }
191
192 static void
no_mouse_wrap(SCREEN * sp GCC_UNUSED)193 no_mouse_wrap(SCREEN *sp GCC_UNUSED)
194 {
195 }
196
197 #if NCURSES_EXT_FUNCS && USE_COLORFGBG
198 static char *
extract_fgbg(char * src,int * result)199 extract_fgbg(char *src, int *result)
200 {
201 char *dst = 0;
202 long value = strtol(src, &dst, 0);
203
204 if (dst == 0) {
205 dst = src;
206 } else if (value >= 0) {
207 *result = value;
208 }
209 while (*dst != 0 && *dst != ';')
210 dst++;
211 if (*dst == ';')
212 dst++;
213 return dst;
214 }
215 #endif
216
217 NCURSES_EXPORT(int)
_nc_setupscreen(short slines,short const scolumns,FILE * output)218 _nc_setupscreen(short slines, short const scolumns, FILE *output)
219 /* OS-independent screen initializations */
220 {
221 int bottom_stolen = 0;
222 int i;
223
224 T((T_CALLED("_nc_setupscreen(%d, %d, %p)"), slines, scolumns, output));
225 assert(SP == 0); /* has been reset in newterm() ! */
226 if (!_nc_alloc_screen())
227 returnCode(ERR);
228
229 T(("created SP %p", SP));
230 SP->_next_screen = _nc_screen_chain;
231 _nc_screen_chain = SP;
232
233 if ((SP->_current_attr = typeCalloc(NCURSES_CH_T, 1)) == 0)
234 returnCode(ERR);
235
236 #ifdef __DJGPP__
237 T(("setting output mode to binary"));
238 fflush(output);
239 setmode(output, O_BINARY);
240 #endif
241 _nc_set_buffer(output, TRUE);
242 SP->_term = cur_term;
243 SP->_lines = slines;
244 SP->_lines_avail = slines;
245 SP->_columns = scolumns;
246 SP->_cursrow = -1;
247 SP->_curscol = -1;
248 SP->_nl = TRUE;
249 SP->_raw = FALSE;
250 SP->_cbreak = 0;
251 SP->_echo = TRUE;
252 SP->_fifohead = -1;
253 SP->_endwin = TRUE;
254 SP->_ofp = output;
255 SP->_cursor = -1; /* cannot know real cursor shape */
256
257 #if NCURSES_NO_PADDING
258 SP->_no_padding = getenv("NCURSES_NO_PADDING") != 0;
259 TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
260 SP->_no_padding ? " not" : ""));
261 #endif
262
263 #if NCURSES_EXT_FUNCS
264 SP->_default_color = FALSE;
265 SP->_has_sgr_39_49 = FALSE;
266
267 /*
268 * Set our assumption of the terminal's default foreground and background
269 * colors. The curs_color man-page states that we can assume that the
270 * background is black. The origin of this assumption appears to be
271 * terminals that displayed colored text, but no colored backgrounds, e.g.,
272 * the first colored terminals around 1980. More recent ones with better
273 * technology can display not only colored backgrounds, but all
274 * combinations. So a terminal might be something other than "white" on
275 * black (green/black looks monochrome too), but black on white or even
276 * on ivory.
277 *
278 * White-on-black is the simplest thing to use for monochrome. Almost
279 * all applications that use color paint both text and background, so
280 * the distinction is moot. But a few do not - which is why we leave this
281 * configurable (a better solution is to use assume_default_colors() for
282 * the rare applications that do require that sort of appearance, since
283 * is appears that more users expect to be able to make a white-on-black
284 * or black-on-white display under control of the application than not).
285 */
286 #ifdef USE_ASSUMED_COLOR
287 SP->_default_fg = COLOR_WHITE;
288 SP->_default_bg = COLOR_BLACK;
289 #else
290 SP->_default_fg = C_MASK;
291 SP->_default_bg = C_MASK;
292 #endif
293
294 /*
295 * Allow those assumed/default color assumptions to be overridden at
296 * runtime:
297 */
298 if (getenv("NCURSES_ASSUMED_COLORS") != 0) {
299 char *p = getenv("NCURSES_ASSUMED_COLORS");
300 int fg, bg;
301 char sep1, sep2;
302 int count = sscanf(p, "%d%c%d%c", &fg, &sep1, &bg, &sep2);
303 if (count >= 1) {
304 SP->_default_fg = (fg >= 0 && fg < max_colors) ? fg : C_MASK;
305 if (count >= 3) {
306 SP->_default_bg = (bg >= 0 && bg < max_colors) ? bg : C_MASK;
307 }
308 TR(TRACE_CHARPUT | TRACE_MOVE,
309 ("from environment assumed fg=%d, bg=%d",
310 SP->_default_fg,
311 SP->_default_bg));
312 }
313 }
314 #if USE_COLORFGBG
315 /*
316 * If rxvt's $COLORFGBG variable is set, use it to specify the assumed
317 * default colors. Note that rxvt (mis)uses bold colors, equating a bold
318 * color to that value plus 8. We'll only use the non-bold color for now -
319 * decide later if it is worth having default attributes as well.
320 */
321 if (getenv("COLORFGBG") != 0) {
322 char *p = getenv("COLORFGBG");
323 TR(TRACE_CHARPUT | TRACE_MOVE, ("decoding COLORFGBG %s", p));
324 p = extract_fgbg(p, &(SP->_default_fg));
325 p = extract_fgbg(p, &(SP->_default_bg));
326 if (*p) /* assume rxvt was compiled with xpm support */
327 p = extract_fgbg(p, &(SP->_default_bg));
328 TR(TRACE_CHARPUT | TRACE_MOVE, ("decoded fg=%d, bg=%d",
329 SP->_default_fg, SP->_default_bg));
330 if (SP->_default_fg >= max_colors) {
331 if (set_a_foreground != ABSENT_STRING
332 && !strcmp(set_a_foreground, "\033[3%p1%dm")) {
333 static char _nc_set_a_foreground[] = "\033[3%?%p1%{8}%>%t9%e%p1%d%;m";
334 set_a_foreground = _nc_set_a_foreground;
335 } else {
336 SP->_default_fg %= max_colors;
337 }
338 }
339 if (SP->_default_bg >= max_colors) {
340 if (set_a_background != ABSENT_STRING
341 && !strcmp(set_a_background, "\033[4%p1%dm")) {
342 static char _nc_set_a_background[] = "\033[4%?%p1%{8}%>%t9%e%p1%d%;m";
343 set_a_background = _nc_set_a_background;
344 } else {
345 SP->_default_bg %= max_colors;
346 }
347 }
348 }
349 #endif
350 #endif /* NCURSES_EXT_FUNCS */
351
352 SP->_maxclick = DEFAULT_MAXCLICK;
353 SP->_mouse_event = no_mouse_event;
354 SP->_mouse_inline = no_mouse_inline;
355 SP->_mouse_parse = no_mouse_parse;
356 SP->_mouse_resume = no_mouse_resume;
357 SP->_mouse_wrap = no_mouse_wrap;
358 SP->_mouse_fd = -1;
359
360 /* initialize the panel hooks */
361 SP->_panelHook.top_panel = (struct panel *) 0;
362 SP->_panelHook.bottom_panel = (struct panel *) 0;
363 SP->_panelHook.stdscr_pseudo_panel = (struct panel *) 0;
364
365 /*
366 * If we've no magic cookie support, we suppress attributes that xmc
367 * would affect, i.e., the attributes that affect the rendition of a
368 * space. Note that this impacts the alternate character set mapping
369 * as well.
370 */
371 if (magic_cookie_glitch > 0) {
372
373 SP->_xmc_triggers = termattrs() & (
374 A_ALTCHARSET |
375 A_BLINK |
376 A_BOLD |
377 A_REVERSE |
378 A_STANDOUT |
379 A_UNDERLINE
380 );
381 SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~(A_BOLD);
382
383 T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress)));
384 #if USE_XMC_SUPPORT
385 /*
386 * To keep this simple, suppress all of the optimization hooks
387 * except for clear_screen and the cursor addressing.
388 */
389 clr_eol = 0;
390 clr_eos = 0;
391 set_attributes = 0;
392 #else
393 magic_cookie_glitch = ABSENT_NUMERIC;
394 acs_chars = 0;
395 #endif
396 }
397
398 /* initialize normal acs before wide, since we use mapping in the latter */
399 _nc_init_acs();
400 #if USE_WIDEC_SUPPORT
401 _nc_init_wacs();
402
403 SP->_screen_acs_fix = (_nc_unicode_locale() && _nc_locale_breaks_acs());
404 {
405 char *env = _nc_get_locale();
406 SP->_legacy_coding = ((env == 0)
407 || (_nc_overridden_locale() && !_nc_unicode_locale())
408 || !strcmp(env, "C")
409 || !strcmp(env, "POSIX"));
410 }
411 #endif
412
413 _nc_idcok = TRUE;
414 _nc_idlok = FALSE;
415
416 _nc_windows = 0; /* no windows yet */
417
418 SP->oldhash = 0;
419 SP->newhash = 0;
420
421 T(("creating newscr"));
422 if ((newscr = newwin(slines, scolumns, 0, 0)) == 0)
423 returnCode(ERR);
424
425 T(("creating curscr"));
426 if ((curscr = newwin(slines, scolumns, 0, 0)) == 0)
427 returnCode(ERR);
428
429 SP->_newscr = newscr;
430 SP->_curscr = curscr;
431 #if USE_SIZECHANGE
432 SP->_resize = resizeterm;
433 #endif
434
435 newscr->_clear = TRUE;
436 curscr->_clear = FALSE;
437
438 def_shell_mode();
439 def_prog_mode();
440
441 for (i = 0, rsp = rippedoff; rsp->line && (i < (int) N_RIPS); rsp++, i++) {
442 T(("ripping off line %d at %s", i, rsp->line < 0 ? "bottom" : "top"));
443 SP->_rippedoff[i] = rippedoff[i];
444 if (rsp->hook) {
445 int count = (rsp->line < 0) ? -rsp->line : rsp->line;
446
447 SP->_rippedoff[i].w = newwin(count,
448 scolumns,
449 ((rsp->line < 0)
450 ? SP->_lines_avail - count
451 : 0),
452 0);
453 if (SP->_rippedoff[i].w != 0)
454 SP->_rippedoff[i].hook(SP->_rippedoff[i].w, scolumns);
455 else
456 returnCode(ERR);
457 if (rsp->line < 0)
458 bottom_stolen += count;
459 else
460 SP->_topstolen += count;
461 SP->_lines_avail -= count;
462 }
463 rsp->line = 0;
464 }
465 SP->_rip_count = i;
466 /* reset the stack */
467 rsp = rippedoff;
468
469 T(("creating stdscr"));
470 assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines);
471 if ((stdscr = newwin(LINES = SP->_lines_avail, scolumns, 0, 0)) == 0)
472 returnCode(ERR);
473 SP->_stdscr = stdscr;
474
475 returnCode(OK);
476 }
477
478 /* The internal implementation interprets line as the number of
479 lines to rip off from the top or bottom.
480 */
481 NCURSES_EXPORT(int)
_nc_ripoffline(int line,int (* init)(WINDOW *,int))482 _nc_ripoffline(int line, int (*init) (WINDOW *, int))
483 {
484 T((T_CALLED("_nc_ripoffline(%d, %p)"), line, init));
485
486 if (line != 0) {
487
488 if (rsp >= rippedoff + N_RIPS)
489 returnCode(ERR);
490
491 rsp->line = line;
492 rsp->hook = init;
493 rsp->w = 0;
494 rsp++;
495 }
496
497 returnCode(OK);
498 }
499
500 NCURSES_EXPORT(int)
ripoffline(int line,int (* init)(WINDOW *,int))501 ripoffline(int line, int (*init) (WINDOW *, int))
502 {
503 T((T_CALLED("ripoffline(%d,%p)"), line, init));
504
505 if (line == 0)
506 returnCode(OK);
507
508 returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init));
509 }
510