aboutsummaryrefslogtreecommitdiff
path: root/contrib/ncurses/ncurses/base/lib_set_term.c
blob: f3940fa03c1c772e784e0e3ffad61e81ff327b5e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/****************************************************************************
 * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/

/*
**	lib_set_term.c
**
**	The routine set_term().
**
*/

#include <curses.priv.h>

#include <term.h>		/* cur_term */
#include <tic.h>

MODULE_ID("$Id: lib_set_term.c,v 1.65 2002/06/15 18:40:20 tom Exp $")

NCURSES_EXPORT(SCREEN *)
set_term(SCREEN * screenp)
{
    SCREEN *oldSP;

    T((T_CALLED("set_term(%p)"), screenp));

    oldSP = SP;
    _nc_set_screen(screenp);

    set_curterm(SP->_term);
    curscr = SP->_curscr;
    newscr = SP->_newscr;
    stdscr = SP->_stdscr;
    COLORS = SP->_color_count;
    COLOR_PAIRS = SP->_pair_count;
    memcpy(acs_map, SP->_acs_map, sizeof(chtype) * ACS_LEN);

    T((T_RETURN("%p"), oldSP));
    return (oldSP);
}

static void
_nc_free_keytry(struct tries *kt)
{
    if (kt != 0) {
	_nc_free_keytry(kt->child);
	_nc_free_keytry(kt->sibling);
	free(kt);
    }
}

/*
 * Free the storage associated with the given SCREEN sp.
 */
NCURSES_EXPORT(void)
delscreen(SCREEN * sp)
{
    SCREEN **scan = &_nc_screen_chain;

    T((T_CALLED("delscreen(%p)"), sp));

    while (*scan) {
	if (*scan == sp) {
	    *scan = sp->_next_screen;
	    break;
	}
	scan = &(*scan)->_next_screen;
    }

    (void) _nc_freewin(sp->_curscr);
    (void) _nc_freewin(sp->_newscr);
    (void) _nc_freewin(sp->_stdscr);
    _nc_free_keytry(sp->_keytry);
    _nc_free_keytry(sp->_key_ok);

    FreeIfNeeded(sp->_color_table);
    FreeIfNeeded(sp->_color_pairs);

    FreeIfNeeded(sp->oldhash);
    FreeIfNeeded(sp->newhash);

    del_curterm(sp->_term);

    /*
     * If the associated output stream has been closed, we can discard the
     * set-buffer.  Limit the error check to EBADF, since fflush may fail
     * for other reasons than trying to operate upon a closed stream.
     */
    if (sp->_ofp != 0
	&& sp->_setbuf != 0
	&& fflush(sp->_ofp) != 0
	&& errno == EBADF) {
	free(sp->_setbuf);
    }

    free(sp);

    /*
     * If this was the current screen, reset everything that the
     * application might try to use (except cur_term, which may have
     * multiple references in different screens).
     */
    if (sp == SP) {
	curscr = 0;
	newscr = 0;
	stdscr = 0;
	COLORS = 0;
	COLOR_PAIRS = 0;
	_nc_set_screen(0);
    }
    returnVoid;
}

static ripoff_t rippedoff[5];
static ripoff_t *rsp = rippedoff;
#define N_RIPS SIZEOF(rippedoff)

static bool
no_mouse_event(SCREEN * sp GCC_UNUSED)
{
    return FALSE;
}

static bool
no_mouse_inline(SCREEN * sp GCC_UNUSED)
{
    return FALSE;
}

static bool
no_mouse_parse(int code GCC_UNUSED)
{
    return TRUE;
}

static void
no_mouse_resume(SCREEN * sp GCC_UNUSED)
{
}

static void
no_mouse_wrap(SCREEN * sp GCC_UNUSED)
{
}

#if NCURSES_EXT_FUNCS && USE_COLORFGBG
static char *
extract_fgbg(char *src, int *result)
{
    char *dst = 0;
    long value = strtol(src, &dst, 0);

    if (dst == 0) {
	dst = src;
    } else if (value >= 0) {
	*result = value;
    }
    while (*dst != 0 && *dst != ';')
	dst++;
    if (*dst == ';')
	dst++;
    return dst;
}
#endif

NCURSES_EXPORT(int)
_nc_setupscreen
(short slines, short const scolumns, FILE * output)
/* OS-independent screen initializations */
{
    int bottom_stolen = 0;
    size_t i;

    assert(SP == 0);		/* has been reset in newterm() ! */
    if (!_nc_alloc_screen())
	return ERR;

    SP->_next_screen = _nc_screen_chain;
    _nc_screen_chain = SP;

    _nc_set_buffer(output, TRUE);
    SP->_term = cur_term;
    SP->_lines = slines;
    SP->_lines_avail = slines;
    SP->_columns = scolumns;
    SP->_cursrow = -1;
    SP->_curscol = -1;
    SP->_nl = TRUE;
    SP->_raw = FALSE;
    SP->_cbreak = 0;
    SP->_echo = TRUE;
    SP->_fifohead = -1;
    SP->_endwin = TRUE;
    SP->_ofp = output;
    SP->_cursor = -1;		/* cannot know real cursor shape */

#if NCURSES_NO_PADDING
    SP->_no_padding = getenv("NCURSES_NO_PADDING") != 0;
    TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
				    SP->_no_padding ? " not" : ""));
#endif

#if NCURSES_EXT_FUNCS
    SP->_default_color = FALSE;
    SP->_has_sgr_39_49 = FALSE;

    /*
     * Set our assumption of the terminal's default foreground and background
     * colors.  The curs_color man-page states that we can assume that the
     * background is black.  The origin of this assumption appears to be
     * terminals that displayed colored text, but no colored backgrounds, e.g.,
     * the first colored terminals around 1980.  More recent ones with better
     * technology can display not only colored backgrounds, but all
     * combinations.  So a terminal might be something other than "white" on
     * black (green/black looks monochrome too), but black on white or even
     * on ivory.
     *
     * White-on-black is the simplest thing to use for monochrome.  Almost
     * all applications that use color paint both text and background, so
     * the distinction is moot.  But a few do not - which is why we leave this
     * configurable (a better solution is to use assume_default_colors() for
     * the rare applications that do require that sort of appearance, since
     * is appears that more users expect to be able to make a white-on-black
     * or black-on-white display under control of the application than not).
     */
#ifdef USE_ASSUMED_COLOR
    SP->_default_fg = COLOR_WHITE;
    SP->_default_bg = COLOR_BLACK;
#else
    SP->_default_fg = C_MASK;
    SP->_default_bg = C_MASK;
#endif

#if USE_COLORFGBG
    /*
     * If rxvt's $COLORFGBG variable is set, use it to specify the assumed
     * default colors.  Note that rxvt (mis)uses bold colors, equating a bold
     * color to that value plus 8.  We'll only use the non-bold color for now -
     * decide later if it is worth having default attributes as well.
     */
    if (getenv("COLORFGBG") != 0) {
	char *p = getenv("COLORFGBG");
	TR(TRACE_CHARPUT | TRACE_MOVE, ("decoding COLORFGBG %s", p));
	p = extract_fgbg(p, &(SP->_default_fg));
	p = extract_fgbg(p, &(SP->_default_bg));
	if (*p)			/* assume rxvt was compiled with xpm support */
	    p = extract_fgbg(p, &(SP->_default_bg));
	TR(TRACE_CHARPUT | TRACE_MOVE, ("decoded fg=%d, bg=%d",
					SP->_default_fg, SP->_default_bg));
	if (SP->_default_fg > max_colors) {
	    if (set_a_foreground != ABSENT_STRING
		&& !strcmp(set_a_foreground, "\033[3%p1%dm")) {
		set_a_foreground = "\033[3%?%p1%{8}%>%t9%e%p1%d%;m";
	    } else {
		SP->_default_fg %= max_colors;
	    }
	}
	if (SP->_default_bg > max_colors) {
	    if (set_a_background != ABSENT_STRING
		&& !strcmp(set_a_background, "\033[4%p1%dm")) {
		set_a_background = "\033[4%?%p1%{8}%>%t9%e%p1%d%;m";
	    } else {
		SP->_default_bg %= max_colors;
	    }
	}
    }
#endif
#endif /* NCURSES_EXT_FUNCS */

    SP->_maxclick = DEFAULT_MAXCLICK;
    SP->_mouse_event = no_mouse_event;
    SP->_mouse_inline = no_mouse_inline;
    SP->_mouse_parse = no_mouse_parse;
    SP->_mouse_resume = no_mouse_resume;
    SP->_mouse_wrap = no_mouse_wrap;
    SP->_mouse_fd = -1;

    /* initialize the panel hooks */
    SP->_panelHook.top_panel = (struct panel *) 0;
    SP->_panelHook.bottom_panel = (struct panel *) 0;
    SP->_panelHook.stdscr_pseudo_panel = (struct panel *) 0;

    /*
     * If we've no magic cookie support, we suppress attributes that xmc
     * would affect, i.e., the attributes that affect the rendition of a
     * space.  Note that this impacts the alternate character set mapping
     * as well.
     */
    if (magic_cookie_glitch > 0) {

	SP->_xmc_triggers = termattrs() & (
					      A_ALTCHARSET |
					      A_BLINK |
					      A_BOLD |
					      A_REVERSE |
					      A_STANDOUT |
					      A_UNDERLINE
	    );
	SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~ (A_BOLD);

	T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress)));
#if USE_XMC_SUPPORT
	/*
	 * To keep this simple, suppress all of the optimization hooks
	 * except for clear_screen and the cursor addressing.
	 */
	clr_eol = 0;
	clr_eos = 0;
	set_attributes = 0;
#else
	magic_cookie_glitch = ABSENT_NUMERIC;
	acs_chars = 0;
#endif
    }
#if USE_WIDEC_SUPPORT
    _nc_init_wacs();
#endif
    _nc_init_acs();
    memcpy(SP->_acs_map, acs_map, sizeof(chtype) * ACS_LEN);

    _nc_idcok = TRUE;
    _nc_idlok = FALSE;

    _nc_windows = 0;		/* no windows yet */

    SP->oldhash = 0;
    SP->newhash = 0;

    T(("creating newscr"));
    if ((newscr = newwin(slines, scolumns, 0, 0)) == 0)
	return ERR;

    T(("creating curscr"));
    if ((curscr = newwin(slines, scolumns, 0, 0)) == 0)
	return ERR;

    SP->_newscr = newscr;
    SP->_curscr = curscr;
#if USE_SIZECHANGE
    SP->_resize = resizeterm;
#endif

    newscr->_clear = TRUE;
    curscr->_clear = FALSE;

    def_shell_mode();
    def_prog_mode();

    for (i = 0, rsp = rippedoff; rsp->line && (i < N_RIPS); rsp++, i++) {
	if (rsp->hook) {
	    WINDOW *w;
	    int count = (rsp->line < 0) ? -rsp->line : rsp->line;

	    if (rsp->line < 0) {
		w = newwin(count, scolumns, SP->_lines_avail - count, 0);
		if (w) {
		    rsp->w = w;
		    rsp->hook(w, scolumns);
		    bottom_stolen += count;
		} else
		    return ERR;
	    } else {
		w = newwin(count, scolumns, 0, 0);
		if (w) {
		    rsp->w = w;
		    rsp->hook(w, scolumns);
		    SP->_topstolen += count;
		} else
		    return ERR;
	    }
	    SP->_lines_avail -= count;
	}
	rsp->line = 0;
    }
    /* reset the stack */
    rsp = rippedoff;

    T(("creating stdscr"));
    assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines);
    if ((stdscr = newwin(LINES = SP->_lines_avail, scolumns, 0, 0)) == 0)
	return ERR;
    SP->_stdscr = stdscr;

    return OK;
}

/* The internal implementation interprets line as the number of
   lines to rip off from the top or bottom.
   */
NCURSES_EXPORT(int)
_nc_ripoffline(int line, int (*init) (WINDOW *, int))
{
    if (line == 0)
	return (OK);

    if (rsp >= rippedoff + N_RIPS)
	return (ERR);

    rsp->line = line;
    rsp->hook = init;
    rsp->w = 0;
    rsp++;

    return (OK);
}

NCURSES_EXPORT(int)
ripoffline(int line, int (*init) (WINDOW *, int))
{
    T((T_CALLED("ripoffline(%d,%p)"), line, init));

    if (line == 0)
	returnCode(OK);

    returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init));
}