1 /****************************************************************************
2 * Copyright (c) 1998-2014,2015 Free Software Foundation, Inc. *
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: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
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. *
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 *
27 ****************************************************************************/
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 * and: Juergen Pfeifer 2009 *
34 ****************************************************************************/
36 /*-----------------------------------------------------------------
40 * The routine doupdate() and its dependents.
41 * All physical output is concentrated here (except _nc_outch()
44 *-----------------------------------------------------------------*/
46 #include <curses.priv.h>
49 #define CUR SP_TERMTYPE
52 #if defined __HAIKU__ && defined __BEOS__
62 #if defined(TRACE) && HAVE_SYS_TIMES_H && HAVE_TIMES
63 #define USE_TRACE_TIMES 1
65 #define USE_TRACE_TIMES 0
68 #if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT
73 #include <sys/times.h>
79 #include <sys/select.h>
85 MODULE_ID("$Id: tty_update.c,v 1.282 2015/12/20 00:59:09 tom Exp $")
88 * This define controls the line-breakout optimization. Every once in a
89 * while during screen refresh, we want to check for input and abort the
90 * update if there's some waiting. CHECK_INTERVAL controls the number of
91 * changed lines to be emitted between input checks.
93 * Note: Input-check-and-abort is no longer done if the screen is being
94 * updated from scratch. This is a feature, not a bug.
96 #define CHECK_INTERVAL 5
98 #define FILL_BCE(sp) (sp->_coloron && !sp->_default_color && !back_color_erase)
100 static const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT);
101 static NCURSES_CH_T normal = NewChar(BLANK_TEXT);
104 * Enable checking to see if doupdate and friends are tracking the true
105 * cursor position correctly. NOTE: this is a debugging hack which will
106 * work ONLY on ANSI-compatible terminals!
108 /* #define POSITION_DEBUG */
110 static NCURSES_INLINE NCURSES_CH_T ClrBlank(NCURSES_SP_DCLx WINDOW *win);
113 static int ClrBottom(SCREEN *, int total);
114 static void ClearScreen(SCREEN *, NCURSES_CH_T blank);
115 static void ClrUpdate(SCREEN *);
116 static void DelChar(SCREEN *, int count);
117 static void InsStr(SCREEN *, NCURSES_CH_T * line, int count);
118 static void TransformLine(SCREEN *, int const lineno);
120 static int ClrBottom(int total);
121 static void ClearScreen(NCURSES_CH_T blank);
122 static void ClrUpdate(void);
123 static void DelChar(int count);
124 static void InsStr(NCURSES_CH_T * line, int count);
125 static void TransformLine(int const lineno);
128 #ifdef POSITION_DEBUG
129 /****************************************************************************
131 * Debugging code. Only works on ANSI-standard terminals.
133 ****************************************************************************/
136 position_check(NCURSES_SP_DCLx int expected_y, int expected_x, char *legend)
137 /* check to see if the real cursor position matches the virtual */
143 if (!_nc_tracing || (expected_y < 0 && expected_x < 0))
146 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
147 memset(buf, '\0', sizeof(buf));
148 NCURSES_PUTP2_FLUSH("cpr", "\033[6n"); /* only works on ANSI-compatibles */
151 int ask = sizeof(buf) - 1 - (s - buf);
152 int got = read(0, s, ask);
156 } while (strchr(buf, 'R') == 0);
157 _tracef("probe returned %s", _nc_visbuf(buf));
159 /* try to interpret as a position report */
160 if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) {
161 _tracef("position probe failed in %s", legend);
167 if (y - 1 != expected_y || x - 1 != expected_x) {
168 NCURSES_SP_NAME(beep) (NCURSES_SP_ARG);
169 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
173 1, NCURSES_SP_NAME(_nc_outch));
174 _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s",
175 y - 1, x - 1, expected_y, expected_x, legend);
177 _tracef("position matches OK in %s", legend);
182 #define position_check(expected_y, expected_x, legend) /* nothing */
183 #endif /* POSITION_DEBUG */
185 /****************************************************************************
187 * Optimized update code
189 ****************************************************************************/
191 static NCURSES_INLINE void
192 GoTo(NCURSES_SP_DCLx int const row, int const col)
194 TR(TRACE_MOVE, ("GoTo(%p, %d, %d) from (%d, %d)",
195 (void *) SP_PARM, row, col, SP_PARM->_cursrow, SP_PARM->_curscol));
197 position_check(NCURSES_SP_ARGx
199 SP_PARM->_curscol, "GoTo");
201 TINFO_MVCUR(NCURSES_SP_ARGx
205 position_check(NCURSES_SP_ARGx
207 SP_PARM->_curscol, "GoTo2");
210 #if !NCURSES_WCWIDTH_GRAPHICS
212 is_wacs_value(unsigned ch)
216 case 0x00a3: /* FALLTHRU - ncurses pound-sterling symbol */
217 case 0x00b0: /* FALLTHRU - VT100 degree symbol */
218 case 0x00b1: /* FALLTHRU - VT100 plus/minus */
219 case 0x00b7: /* FALLTHRU - VT100 bullet */
220 case 0x03c0: /* FALLTHRU - ncurses greek pi */
221 case 0x2190: /* FALLTHRU - Teletype arrow pointing left */
222 case 0x2191: /* FALLTHRU - Teletype arrow pointing up */
223 case 0x2192: /* FALLTHRU - Teletype arrow pointing right */
224 case 0x2193: /* FALLTHRU - Teletype arrow pointing down */
225 case 0x2260: /* FALLTHRU - ncurses not-equal */
226 case 0x2264: /* FALLTHRU - ncurses less-than-or-equal-to */
227 case 0x2265: /* FALLTHRU - ncurses greater-than-or-equal-to */
228 case 0x23ba: /* FALLTHRU - VT100 scan line 1 */
229 case 0x23bb: /* FALLTHRU - ncurses scan line 3 */
230 case 0x23bc: /* FALLTHRU - ncurses scan line 7 */
231 case 0x23bd: /* FALLTHRU - VT100 scan line 9 */
232 case 0x2500: /* FALLTHRU - VT100 horizontal line */
233 case 0x2501: /* FALLTHRU - thick horizontal line */
234 case 0x2502: /* FALLTHRU - VT100 vertical line */
235 case 0x2503: /* FALLTHRU - thick vertical line */
236 case 0x250c: /* FALLTHRU - VT100 upper left corner */
237 case 0x250f: /* FALLTHRU - thick upper left corner */
238 case 0x2510: /* FALLTHRU - VT100 upper right corner */
239 case 0x2513: /* FALLTHRU - thick upper right corner */
240 case 0x2514: /* FALLTHRU - VT100 lower left corner */
241 case 0x2517: /* FALLTHRU - thick lower left corner */
242 case 0x2518: /* FALLTHRU - VT100 lower right corner */
243 case 0x251b: /* FALLTHRU - thick lower right corner */
244 case 0x251c: /* FALLTHRU - VT100 tee pointing left */
245 case 0x2523: /* FALLTHRU - thick tee pointing left */
246 case 0x2524: /* FALLTHRU - VT100 tee pointing right */
247 case 0x252b: /* FALLTHRU - thick tee pointing right */
248 case 0x252c: /* FALLTHRU - VT100 tee pointing down */
249 case 0x2533: /* FALLTHRU - thick tee pointing down */
250 case 0x2534: /* FALLTHRU - VT100 tee pointing up */
251 case 0x253b: /* FALLTHRU - thick tee pointing up */
252 case 0x253c: /* FALLTHRU - VT100 large plus or crossover */
253 case 0x254b: /* FALLTHRU - thick large plus or crossover */
254 case 0x2550: /* FALLTHRU - double horizontal line */
255 case 0x2551: /* FALLTHRU - double vertical line */
256 case 0x2554: /* FALLTHRU - double upper left corner */
257 case 0x2557: /* FALLTHRU - double upper right corner */
258 case 0x255a: /* FALLTHRU - double lower left corner */
259 case 0x255d: /* FALLTHRU - double lower right corner */
260 case 0x2560: /* FALLTHRU - double tee pointing right */
261 case 0x2563: /* FALLTHRU - double tee pointing left */
262 case 0x2566: /* FALLTHRU - double tee pointing down */
263 case 0x2569: /* FALLTHRU - double tee pointing up */
264 case 0x256c: /* FALLTHRU - double large plus or crossover */
265 case 0x2592: /* FALLTHRU - VT100 checker board (stipple) */
266 case 0x25ae: /* FALLTHRU - Teletype solid square block */
267 case 0x25c6: /* FALLTHRU - VT100 diamond */
268 case 0x2603: /* FALLTHRU - Teletype lantern symbol */
279 static NCURSES_INLINE void
280 PutAttrChar(NCURSES_SP_DCLx CARG_CH_T ch)
284 #if USE_WIDEC_SUPPORT
288 NCURSES_CH_T attr = CHDEREF(ch);
290 TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)",
292 SP_PARM->_cursrow, SP_PARM->_curscol));
293 #if USE_WIDEC_SUPPORT
295 * If this is not a valid character, there is nothing more to do.
297 if (isWidecExt(CHDEREF(ch))) {
298 TR(TRACE_CHARPUT, ("...skip"));
302 * Determine the number of character cells which the 'ch' value will use
303 * on the screen. It should be at least one.
305 if ((chlen = wcwidth(CharOf(CHDEREF(ch)))) <= 0) {
306 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
309 * If the character falls into any of these special cases, do
310 * not force the result to a blank:
312 * a) it is printable (this works around a bug in wcwidth()).
313 * b) use_legacy_coding() has been called to modify the treatment
315 * c) the acs_map[] has been initialized to allow codes 0-31
316 * to be rendered. This supports Linux console's "PC"
317 * characters. Codes 128-255 are allowed though this is
320 if (is8bits(CharOf(CHDEREF(ch)))
321 && (isprint(CharOf(CHDEREF(ch)))
322 || (SP_PARM->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160)
323 || (SP_PARM->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128)
324 || (AttrOf(attr) & A_ALTCHARSET
325 && ((CharOfD(ch) < ACS_LEN
326 && SP_PARM->_acs_map != 0
327 && SP_PARM->_acs_map[CharOfD(ch)] != 0)
328 || (CharOfD(ch) >= 128))))) {
332 TR(TRACE_CHARPUT, ("forced to blank"));
338 if ((AttrOf(attr) & A_ALTCHARSET)
339 && SP_PARM->_acs_map != 0
340 && ((CharOfD(ch) < ACS_LEN)
341 #if !NCURSES_WCWIDTH_GRAPHICS
342 || is_wacs_value(CharOfD(ch))
345 my_ch = CHDEREF(ch); /* work around const param */
346 #if USE_WIDEC_SUPPORT
348 * This is crude & ugly, but works most of the time. It checks if the
349 * acs_chars string specified that we have a mapping for this
350 * character, and uses the wide-character mapping when we expect the
351 * normal one to be broken (by mis-design ;-).
353 if (SP_PARM->_screen_unicode
354 && _nc_wacs[CharOf(my_ch)].chars[0]) {
355 if (SP_PARM->_screen_acs_map[CharOf(my_ch)]) {
356 if (SP_PARM->_screen_acs_fix) {
357 RemAttr(attr, A_ALTCHARSET);
358 my_ch = _nc_wacs[CharOf(my_ch)];
361 RemAttr(attr, A_ALTCHARSET);
362 my_ch = _nc_wacs[CharOf(my_ch)];
364 #if !NCURSES_WCWIDTH_GRAPHICS
365 if (!(AttrOf(attr) & A_ALTCHARSET)) {
368 #endif /* !NCURSES_WCWIDTH_GRAPHICS */
372 * If we (still) have alternate character set, it is the normal 8bit
373 * flavor. The _screen_acs_map[] array tells if the character was
374 * really in acs_chars, needed because of the way wide/normal line
375 * drawing flavors are integrated.
377 if (AttrOf(attr) & A_ALTCHARSET) {
379 chtype temp = UChar(SP_PARM->_acs_map[j]);
382 SetChar(my_ch, temp, AttrOf(attr));
385 RemAttr(attr, A_ALTCHARSET);
390 #if USE_WIDEC_SUPPORT && !NCURSES_WCWIDTH_GRAPHICS
391 else if (chlen > 1 && is_wacs_value(CharOfD(ch))) {
395 if (tilde_glitch && (CharOfD(ch) == L('~'))) {
396 SetChar(tilde, L('`'), AttrOf(attr));
400 UpdateAttrs(SP_PARM, attr);
402 #if !USE_WIDEC_SUPPORT
405 SP_PARM->_curscol += chlen;
407 NCURSES_PUTP2("char_padding", char_padding);
412 check_pending(NCURSES_SP_DCL0)
413 /* check for pending input */
415 bool have_pending = FALSE;
418 * Only carry out this check when the flag is zero, otherwise we'll
419 * have the refreshing slow down drastically (or stop) if there's an
420 * unread character available.
422 if (SP_PARM->_fifohold != 0)
425 if (SP_PARM->_checkfd >= 0) {
427 struct pollfd fds[1];
428 fds[0].fd = SP_PARM->_checkfd;
429 fds[0].events = POLLIN;
430 if (poll(fds, (size_t) 1, 0) > 0) {
433 #elif defined(__BEOS__)
435 * BeOS's select() is declared in socket.h, so the configure script does
436 * not see it. That's just as well, since that function works only for
437 * sockets. This (using snooze and ioctl) was distilled from Be's patch
438 * for ncurses which uses a separate thread to simulate select().
440 * FIXME: the return values from the ioctl aren't very clear if we get
444 int howmany = ioctl(0, 'ichr', &n);
445 if (howmany >= 0 && n > 0) {
450 struct timeval ktimeout;
453 ktimeout.tv_usec = 0;
456 FD_SET(SP_PARM->_checkfd, &fdset);
457 if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) {
463 SP_PARM->_fifohold = 5;
464 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
469 /* put char at lower right corner */
471 PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch)
473 if (!auto_right_margin) {
474 /* we can put the char directly */
475 PutAttrChar(NCURSES_SP_ARGx ch);
476 } else if (enter_am_mode && exit_am_mode) {
477 /* we can suppress automargin */
478 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
480 PutAttrChar(NCURSES_SP_ARGx ch);
482 position_check(NCURSES_SP_ARGx
487 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
488 } else if ((enter_insert_mode && exit_insert_mode)
489 || insert_character || parm_ich) {
491 screen_lines(SP_PARM) - 1,
492 screen_columns(SP_PARM) - 2);
493 PutAttrChar(NCURSES_SP_ARGx ch);
495 screen_lines(SP_PARM) - 1,
496 screen_columns(SP_PARM) - 2);
497 InsStr(NCURSES_SP_ARGx
498 NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text +
499 screen_columns(SP_PARM) - 2, 1);
504 * Wrap the cursor position, i.e., advance to the beginning of the next line.
507 wrap_cursor(NCURSES_SP_DCL0)
509 if (eat_newline_glitch) {
511 * xenl can manifest two different ways. The vt100 way is that, when
512 * you'd expect the cursor to wrap, it stays hung at the right margin
513 * (on top of the character just emitted) and doesn't wrap until the
514 * *next* graphic char is emitted. The c100 way is to ignore LF
515 * received just after an am wrap.
517 * An aggressive way to handle this would be to emit CR/LF after the
518 * char and then assume the wrap is done, you're on the first position
519 * of the next line, and the terminal out of its weird state. Here
520 * it's safe to just tell the code that the cursor is in hyperspace and
521 * let the next mvcur() call straighten things out.
523 SP_PARM->_curscol = -1;
524 SP_PARM->_cursrow = -1;
525 } else if (auto_right_margin) {
526 SP_PARM->_curscol = 0;
529 * We've actually moved - but may have to work around problems with
530 * video attributes not working.
532 if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) {
533 TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping",
534 (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)),
535 _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM)))));
536 (void) VIDATTR(SP_PARM, A_NORMAL, 0);
541 position_check(NCURSES_SP_ARGx
547 static NCURSES_INLINE void
548 PutChar(NCURSES_SP_DCLx const ARG_CH_T ch)
549 /* insert character, handling automargin stuff */
551 if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 &&
552 SP_PARM->_curscol == screen_columns(SP_PARM) - 1) {
553 PutCharLR(NCURSES_SP_ARGx ch);
555 PutAttrChar(NCURSES_SP_ARGx ch);
558 if (SP_PARM->_curscol >= screen_columns(SP_PARM))
559 wrap_cursor(NCURSES_SP_ARG);
561 position_check(NCURSES_SP_ARGx
563 SP_PARM->_curscol, "PutChar");
567 * Check whether the given character can be output by clearing commands. This
568 * includes test for being a space and not including any 'bad' attributes, such
569 * as A_REVERSE. All attribute flags which don't affect appearance of a space
570 * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded.
572 static NCURSES_INLINE bool
573 can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch)
575 if (!back_color_erase && SP_PARM->_coloron) {
576 #if NCURSES_EXT_FUNCS
579 if (!SP_PARM->_default_color)
581 if (SP_PARM->_default_fg != C_MASK || SP_PARM->_default_bg != C_MASK)
583 if ((pair = GetPair(CHDEREF(ch))) != 0) {
584 NCURSES_COLOR_T fg, bg;
585 if (NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx
588 || (fg != C_MASK || bg != C_MASK)) {
593 if (AttrOfD(ch) & A_COLOR)
597 return (ISBLANK(CHDEREF(ch)) &&
598 (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR);
602 * Issue a given span of characters from an array.
603 * Must be functionally equivalent to:
604 * for (i = 0; i < num; i++)
606 * but can leave the cursor positioned at the middle of the interval.
608 * Returns: 0 - cursor is at the end of interval
609 * 1 - cursor is somewhere in the middle
611 * This code is optimized using ech and rep.
614 EmitRange(NCURSES_SP_DCLx const NCURSES_CH_T * ntext, int num)
618 TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num)));
620 if (erase_chars || repeat_char) {
625 while (num > 1 && !CharEq(ntext[0], ntext[1])) {
626 PutChar(NCURSES_SP_ARGx CHREF(ntext[0]));
632 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
637 while (runcount < num && CharEq(ntext[runcount], ntext0))
641 * The cost expression in the middle isn't exactly right.
642 * _cup_ch_cost is an upper bound on the cost for moving to the
643 * end of the erased area, but not the cost itself (which we
644 * can't compute without emitting the move). This may result
645 * in erase_chars not getting used in some situations for
646 * which it would be marginally advantageous.
649 && runcount > SP_PARM->_ech_cost + SP_PARM->_cup_ch_cost
650 && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) {
651 UpdateAttrs(SP_PARM, ntext0);
652 NCURSES_PUTP2("erase_chars", TPARM_1(erase_chars, runcount));
655 * If this is the last part of the given interval,
656 * don't bother moving cursor, since it can be the
657 * last update on the line.
659 if (runcount < num) {
662 SP_PARM->_curscol + runcount);
664 return 1; /* cursor stays in the middle */
666 } else if (repeat_char && runcount > SP_PARM->_rep_cost) {
667 bool wrap_possible = (SP_PARM->_curscol + runcount >=
668 screen_columns(SP_PARM));
669 int rep_count = runcount;
674 UpdateAttrs(SP_PARM, ntext0);
675 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
680 NCURSES_SP_NAME(_nc_outch));
681 SP_PARM->_curscol += rep_count;
684 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
686 for (i = 0; i < runcount; i++)
687 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
695 for (i = 0; i < num; i++)
696 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
701 * Output the line in the given range [first .. last]
703 * If there's a run of identical characters that's long enough to justify
704 * cursor movement, use that also.
706 * Returns: same as EmitRange
709 PutRange(NCURSES_SP_DCLx
710 const NCURSES_CH_T * otext,
711 const NCURSES_CH_T * ntext,
718 TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)",
720 (const void *) otext,
721 (const void *) ntext,
725 && (last - first + 1) > SP_PARM->_inline_cost) {
726 for (j = first, same = 0; j <= last; j++) {
727 if (!same && isWidecExt(otext[j]))
729 if (CharEq(otext[j], ntext[j])) {
732 if (same > SP_PARM->_inline_cost) {
733 EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
734 GoTo(NCURSES_SP_ARGx row, first = j);
739 i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
741 * Always return 1 for the next GoTo() after a PutRange() if we found
742 * identical characters at end of interval
744 rc = (same == 0 ? i : 1);
746 rc = EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1);
751 /* leave unbracketed here so 'indent' works */
752 #define MARK_NOCHANGE(win,row) \
753 win->_line[row].firstchar = _NOCHANGE; \
754 win->_line[row].lastchar = _NOCHANGE; \
755 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row)
758 TINFO_DOUPDATE(NCURSES_SP_DCL0)
763 struct tms before, after;
764 #endif /* USE_TRACE_TIMES */
766 T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM));
773 * It is "legal" but unlikely that an application could assign a new
774 * value to one of the standard windows. Check for that possibility
775 * and try to recover.
777 * We do not allow applications to assign new values in the reentrant
780 #define SyncScreens(internal,exported) \
781 if (internal == 0) internal = exported; \
782 if (internal != exported) exported = internal
784 SyncScreens(CurScreen(SP_PARM), curscr);
785 SyncScreens(NewScreen(SP_PARM), newscr);
786 SyncScreens(StdScreen(SP_PARM), stdscr);
789 if (CurScreen(SP_PARM) == 0
790 || NewScreen(SP_PARM) == 0
791 || StdScreen(SP_PARM) == 0)
795 if (USE_TRACEF(TRACE_UPDATE)) {
796 if (CurScreen(SP_PARM)->_clear)
797 _tracef("curscr is clear");
799 _tracedump("curscr", CurScreen(SP_PARM));
800 _tracedump("newscr", NewScreen(SP_PARM));
801 _nc_unlock_global(tracef);
805 _nc_signal_handler(FALSE);
807 if (SP_PARM->_fifohold)
808 SP_PARM->_fifohold--;
811 if (SP_PARM->_endwin || _nc_handle_sigwinch(SP_PARM)) {
813 * This is a transparent extension: XSI does not address it,
814 * and applications need not know that ncurses can do it.
816 * Check if the terminal size has changed while curses was off
817 * (this can happen in an xterm, for example), and resize the
818 * ncurses data structures accordingly.
820 _nc_update_screensize(SP_PARM);
824 if (SP_PARM->_endwin) {
826 T(("coming back from shell mode"));
827 NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG);
829 NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG);
830 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
831 SP_PARM->_mouse_resume(SP_PARM);
833 SP_PARM->_endwin = FALSE;
836 /* zero the metering machinery */
838 (void) times(&before);
839 #endif /* USE_TRACE_TIMES */
842 * This is the support for magic-cookie terminals. The theory: we scan
843 * the virtual screen looking for attribute turnons. Where we find one,
844 * check to make sure it's realizable by seeing if the required number of
845 * un-attributed blanks are present before and after the attributed range;
846 * try to shift the range boundaries over blanks (not changing the screen
847 * display) so this becomes true. If it is, shift the beginning attribute
848 * change appropriately (the end one, if we've gotten this far, is
849 * guaranteed room for its cookie). If not, nuke the added attributes out
853 if (magic_cookie_glitch > 0) {
855 attr_t rattr = A_NORMAL;
857 for (i = 0; i < screen_lines(SP_PARM); i++) {
858 for (j = 0; j < screen_columns(SP_PARM); j++) {
860 NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text;
861 attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers;
862 attr_t turnon = thisattr & ~rattr;
864 /* is an attribute turned on here? */
870 TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr)));
871 TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon)));
874 * If the attribute change location is a blank with a "safe"
875 * attribute, undo the attribute turnon. This may ensure
876 * there's enough room to set the attribute before the first
877 * non-blank in the run.
879 #define SAFE(scr,a) (!((a) & (scr)->_xmc_triggers))
880 if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) {
881 RemAttr(thisline[j], turnon);
885 /* check that there's enough room at start of span */
886 for (k = 1; k <= magic_cookie_glitch; k++) {
888 || !ISBLANK(thisline[j - k])
889 || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) {
891 TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s",
893 (ISBLANK(thisline[j - k])
896 (SAFE(SP_PARM, AttrOf(thisline[j - k]))
903 bool end_onscreen = FALSE;
906 /* find end of span, if it's onscreen */
907 for (m = i; m < screen_lines(SP_PARM); m++) {
908 for (; n < screen_columns(SP_PARM); n++) {
910 AttrOf(NewScreen(SP_PARM)->_line[m].text[n]);
911 if ((testattr & SP_PARM->_xmc_triggers) == rattr) {
914 ("Range attributed with %s ends at (%d, %d)",
915 _traceattr(turnon), m, n));
922 ("Range attributed with %s ends offscreen",
923 _traceattr(turnon)));
927 NCURSES_CH_T *lastline =
928 NewScreen(SP_PARM)->_line[m].text;
931 * If there are safely-attributed blanks at the end of
932 * the range, shorten the range. This will help ensure
933 * that there is enough room at end of span.
936 && ISBLANK(lastline[n])
937 && SAFE(SP_PARM, AttrOf(lastline[n]))) {
938 RemAttr(lastline[n--], turnon);
941 /* check that there's enough room at end of span */
942 for (k = 1; k <= magic_cookie_glitch; k++) {
943 if (n + k >= screen_columns(SP_PARM)
944 || !ISBLANK(lastline[n + k])
945 || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) {
948 ("No room at end in %d,%d%s%s",
950 (ISBLANK(lastline[n + k])
953 (SAFE(SP_PARM, AttrOf(lastline[n + k]))
966 ("Clearing %s beginning at (%d, %d)",
967 _traceattr(turnon), i, j));
969 /* turn off new attributes over span */
970 for (p = i; p < screen_lines(SP_PARM); p++) {
971 for (; q < screen_columns(SP_PARM); q++) {
972 attr_t testattr = AttrOf(newscr->_line[p].text[q]);
973 if ((testattr & SP_PARM->_xmc_triggers) == rattr)
975 RemAttr(NewScreen(SP_PARM)->_line[p].text[q], turnon);
982 ("Cookie space for %s found before (%d, %d)",
983 _traceattr(turnon), i, j));
986 * Back up the start of range so there's room for cookies
987 * before the first nonblank character.
989 for (k = 1; k <= magic_cookie_glitch; k++)
990 AddAttr(thisline[j - k], turnon);
998 /* show altered highlights after magic-cookie check */
999 if (USE_TRACEF(TRACE_UPDATE)) {
1000 _tracef("After magic-cookie check...");
1001 _tracedump("newscr", NewScreen(SP_PARM));
1002 _nc_unlock_global(tracef);
1006 #endif /* USE_XMC_SUPPORT */
1009 if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */
1010 ClrUpdate(NCURSES_SP_ARG);
1011 CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1012 NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1014 int changedlines = CHECK_INTERVAL;
1016 if (check_pending(NCURSES_SP_ARG))
1019 nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1);
1021 if (SP_PARM->_scrolling) {
1022 NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG);
1025 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1027 TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty));
1028 for (i = 0; i < nonempty; i++) {
1030 * Here is our line-breakout optimization.
1032 if (changedlines == CHECK_INTERVAL) {
1033 if (check_pending(NCURSES_SP_ARG))
1039 * newscr->line[i].firstchar is normally set
1040 * by wnoutrefresh. curscr->line[i].firstchar
1041 * is normally set by _nc_scroll_window in the
1042 * vertical-movement optimization code,
1044 if (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE
1045 || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) {
1046 TransformLine(NCURSES_SP_ARGx i);
1050 /* mark line changed successfully */
1051 if (i <= NewScreen(SP_PARM)->_maxy) {
1052 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1054 if (i <= CurScreen(SP_PARM)->_maxy) {
1055 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1060 /* put everything back in sync */
1061 for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) {
1062 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1064 for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) {
1065 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1068 if (!NewScreen(SP_PARM)->_leaveok) {
1069 CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx;
1070 CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury;
1072 GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx);
1077 * We would like to keep the physical screen in normal mode in case we get
1078 * other processes writing to the screen. This goal cannot be met for
1079 * magic cookies since it interferes with attributes that may propagate
1080 * past the current position.
1083 if (magic_cookie_glitch != 0)
1085 UpdateAttrs(SP_PARM, normal);
1087 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
1088 WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM));
1091 (void) times(&after);
1093 ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time",
1095 (long) (after.tms_stime - before.tms_stime),
1096 (long) (after.tms_utime - before.tms_utime)));
1097 #endif /* USE_TRACE_TIMES */
1099 _nc_signal_handler(TRUE);
1104 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
1108 return TINFO_DOUPDATE(CURRENT_SCREEN);
1115 * Returns the attributed character that corresponds to the "cleared"
1116 * screen. If the terminal has the back-color-erase feature, this will be
1117 * colored according to the wbkgd() call.
1119 * We treat 'curscr' specially because it isn't supposed to be set directly
1120 * in the wbkgd() call. Assume 'stdscr' for this case.
1122 #define BCE_ATTRS (A_NORMAL|A_COLOR)
1123 #define BCE_BKGD(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd)
1125 static NCURSES_INLINE NCURSES_CH_T
1126 ClrBlank(NCURSES_SP_DCLx WINDOW *win)
1128 NCURSES_CH_T blank = blankchar;
1129 if (back_color_erase)
1130 AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
1137 ** Update by clearing and redrawing the entire screen.
1142 ClrUpdate(NCURSES_SP_DCL0)
1144 TR(TRACE_UPDATE, (T_CALLED("ClrUpdate")));
1147 NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1148 int nonempty = min(screen_lines(SP_PARM),
1149 NewScreen(SP_PARM)->_maxy + 1);
1151 ClearScreen(NCURSES_SP_ARGx blank);
1153 TR(TRACE_UPDATE, ("updating screen from scratch"));
1155 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1157 for (i = 0; i < nonempty; i++)
1158 TransformLine(NCURSES_SP_ARGx i);
1160 TR(TRACE_UPDATE, (T_RETURN("")));
1166 ** Clear to end of current line, starting at the cursor position
1170 ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear)
1174 if (CurScreen(SP_PARM) != 0
1175 && SP_PARM->_cursrow >= 0) {
1176 for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) {
1179 &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]);
1181 if (!CharEq(*cp, blank)) {
1190 UpdateAttrs(SP_PARM, blank);
1191 if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) {
1192 NCURSES_PUTP2("clr_eol", clr_eol);
1194 int count = (screen_columns(SP_PARM) - SP_PARM->_curscol);
1196 PutChar(NCURSES_SP_ARGx CHREF(blank));
1204 ** Clear to end of screen, starting at the cursor position
1208 ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank)
1212 row = SP_PARM->_cursrow;
1213 col = SP_PARM->_curscol;
1220 UpdateAttrs(SP_PARM, blank);
1221 TPUTS_TRACE("clr_eos");
1222 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1224 screen_lines(SP_PARM) - row,
1225 NCURSES_SP_NAME(_nc_outch));
1227 while (col < screen_columns(SP_PARM))
1228 CurScreen(SP_PARM)->_line[row].text[col++] = blank;
1230 for (row++; row < screen_lines(SP_PARM); row++) {
1231 for (col = 0; col < screen_columns(SP_PARM); col++)
1232 CurScreen(SP_PARM)->_line[row].text[col] = blank;
1239 * Test if clearing the end of the screen would satisfy part of the
1240 * screen-update. Do this by scanning backwards through the lines in the
1241 * screen, checking if each is blank, and one or more are changed.
1244 ClrBottom(NCURSES_SP_DCLx int total)
1249 int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1);
1250 NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1];
1253 if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1255 for (row = total - 1; row >= 0; row--) {
1256 for (col = 0, ok = TRUE; ok && col < last; col++) {
1257 ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank));
1262 for (col = 0; ok && col < last; col++) {
1263 ok = (CharEq(CurScreen(SP_PARM)->_line[row].text[col], blank));
1269 /* don't use clr_eos for just one line if clr_eol available */
1271 GoTo(NCURSES_SP_ARGx top, 0);
1272 ClrToEOS(NCURSES_SP_ARGx blank);
1273 if (SP_PARM->oldhash && SP_PARM->newhash) {
1274 for (row = top; row < screen_lines(SP_PARM); row++)
1275 SP_PARM->oldhash[row] = SP_PARM->newhash[row];
1283 #if USE_WIDEC_SUPPORT
1284 #define check_xmc_transition(sp, a, b) \
1285 ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0)
1286 #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b))
1288 #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0)
1291 #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c]
1292 #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a)
1293 #endif /* USE_XMC_SUPPORT */
1296 ** TransformLine(lineno)
1298 ** Transform the given line in curscr to the one in newscr, using
1299 ** Insert/Delete Character if idcok && has_ic().
1301 ** firstChar = position of first different character in line
1302 ** oLastChar = position of last different character in old line
1303 ** nLastChar = position of last different character in new line
1305 ** move to firstChar
1306 ** overwrite chars up to min(oLastChar, nLastChar)
1307 ** if oLastChar < nLastChar
1308 ** insert newLine[oLastChar+1..nLastChar]
1310 ** delete oLastChar - nLastChar spaces
1314 TransformLine(NCURSES_SP_DCLx int const lineno)
1316 int firstChar, oLastChar, nLastChar;
1317 NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text;
1318 NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text;
1320 bool attrchanged = FALSE;
1322 TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno));
1324 /* copy new hash value to old one */
1325 if (SP_PARM->oldhash && SP_PARM->newhash)
1326 SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno];
1329 * If we have colors, there is the possibility of having two color pairs
1330 * that display as the same colors. For instance, Lynx does this. Check
1331 * for this case, and update the old line with the new line's colors when
1332 * they are equivalent.
1334 if (SP_PARM->_coloron) {
1338 for (n = 0; n < screen_columns(SP_PARM); n++) {
1339 if (!CharEq(newLine[n], oldLine[n])) {
1340 oldPair = GetPair(oldLine[n]);
1341 newPair = GetPair(newLine[n]);
1342 if (oldPair != newPair
1343 && unColor(oldLine[n]) == unColor(newLine[n])) {
1344 if (oldPair < SP_PARM->_pair_limit
1345 && newPair < SP_PARM->_pair_limit
1346 && (SP_PARM->_color_pairs[oldPair] ==
1347 SP_PARM->_color_pairs[newPair])) {
1348 SetPair(oldLine[n], GetPair(newLine[n]));
1355 if (ceol_standout_glitch && clr_eol) {
1357 while (firstChar < screen_columns(SP_PARM)) {
1358 if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) {
1368 if (attrchanged) { /* we may have to disregard the whole line */
1369 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1370 ClrToEOL(NCURSES_SP_ARGx
1371 ClrBlank(NCURSES_SP_ARGx
1372 CurScreen(SP_PARM)), FALSE);
1373 PutRange(NCURSES_SP_ARGx
1374 oldLine, newLine, lineno, 0,
1375 screen_columns(SP_PARM) - 1);
1379 * This is a very simple loop to paint characters which may have the
1380 * magic cookie glitch embedded. It doesn't know much about video
1381 * attributes which are continued from one line to the next. It
1382 * assumes that we have filtered out requests for attribute changes
1383 * that do not get mapped to blank positions.
1385 * FIXME: we are not keeping track of where we put the cookies, so this
1386 * will work properly only once, since we may overwrite a cookie in a
1387 * following operation.
1389 } else if (magic_cookie_glitch > 0) {
1390 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1391 for (n = 0; n < screen_columns(SP_PARM); n++) {
1392 int m = n + magic_cookie_glitch;
1394 /* check for turn-on:
1395 * If we are writing an attributed blank, where the
1396 * previous cell is not attributed.
1398 if (ISBLANK(newLine[n])
1400 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n]))
1403 && xmc_turn_on(SP_PARM,
1404 xmc_new(SP_PARM, lineno - 1,
1405 screen_columns(SP_PARM) - 1),
1410 PutChar(NCURSES_SP_ARGx CHREF(newLine[n]));
1412 /* check for turn-off:
1413 * If we are writing an attributed non-blank, where the
1414 * next cell is blank, and not attributed.
1416 if (!ISBLANK(newLine[n])
1417 && ((n + 1 < screen_columns(SP_PARM)
1418 && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1]))
1419 || (n + 1 >= screen_columns(SP_PARM)
1420 && lineno + 1 < screen_lines(SP_PARM)
1421 && xmc_turn_off(SP_PARM,
1423 xmc_new(SP_PARM, lineno + 1, 0))))) {
1432 /* it may be cheap to clear leading whitespace with clr_bol */
1434 if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1435 int oFirstChar, nFirstChar;
1437 for (oFirstChar = 0;
1438 oFirstChar < screen_columns(SP_PARM);
1440 if (!CharEq(oldLine[oFirstChar], blank))
1442 for (nFirstChar = 0;
1443 nFirstChar < screen_columns(SP_PARM);
1445 if (!CharEq(newLine[nFirstChar], blank))
1448 if (nFirstChar == oFirstChar) {
1449 firstChar = nFirstChar;
1450 /* find the first differing character */
1451 while (firstChar < screen_columns(SP_PARM)
1452 && CharEq(newLine[firstChar], oldLine[firstChar]))
1454 } else if (oFirstChar > nFirstChar) {
1455 firstChar = nFirstChar;
1456 } else { /* oFirstChar < nFirstChar */
1457 firstChar = oFirstChar;
1458 if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) {
1459 if (nFirstChar >= screen_columns(SP_PARM)
1460 && SP_PARM->_el_cost <= SP_PARM->_el1_cost) {
1461 GoTo(NCURSES_SP_ARGx lineno, 0);
1462 UpdateAttrs(SP_PARM, blank);
1463 NCURSES_PUTP2("clr_eol", clr_eol);
1465 GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1);
1466 UpdateAttrs(SP_PARM, blank);
1467 NCURSES_PUTP2("clr_bol", clr_bol);
1470 while (firstChar < nFirstChar)
1471 oldLine[firstChar++] = blank;
1475 /* find the first differing character */
1476 while (firstChar < screen_columns(SP_PARM)
1477 && CharEq(newLine[firstChar], oldLine[firstChar]))
1480 /* if there wasn't one, we're done */
1481 if (firstChar >= screen_columns(SP_PARM)) {
1482 TR(TRACE_UPDATE, (T_RETURN("")));
1486 blank = newLine[screen_columns(SP_PARM) - 1];
1488 if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1489 /* find the last differing character */
1490 nLastChar = screen_columns(SP_PARM) - 1;
1492 while (nLastChar > firstChar
1493 && CharEq(newLine[nLastChar], oldLine[nLastChar]))
1496 if (nLastChar >= firstChar) {
1497 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1498 PutRange(NCURSES_SP_ARGx
1504 memcpy(oldLine + firstChar,
1505 newLine + firstChar,
1506 (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T));
1508 TR(TRACE_UPDATE, (T_RETURN("")));
1512 /* find last non-blank character on old line */
1513 oLastChar = screen_columns(SP_PARM) - 1;
1514 while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank))
1517 /* find last non-blank character on new line */
1518 nLastChar = screen_columns(SP_PARM) - 1;
1519 while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank))
1522 if ((nLastChar == firstChar)
1523 && (SP_PARM->_el_cost < (oLastChar - nLastChar))) {
1524 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1525 if (!CharEq(newLine[firstChar], blank))
1526 PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar]));
1527 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1528 } else if ((nLastChar != oLastChar)
1529 && (!CharEq(newLine[nLastChar], oldLine[oLastChar])
1530 || !(SP_PARM->_nc_sp_idcok
1531 && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) {
1532 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1533 if ((oLastChar - nLastChar) > SP_PARM->_el_cost) {
1534 if (PutRange(NCURSES_SP_ARGx
1540 GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1);
1542 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1544 n = max(nLastChar, oLastChar);
1545 PutRange(NCURSES_SP_ARGx
1553 int nLastNonblank = nLastChar;
1554 int oLastNonblank = oLastChar;
1556 /* find the last characters that really differ */
1557 /* can be -1 if no characters differ */
1558 while (CharEq(newLine[nLastChar], oldLine[oLastChar])) {
1559 /* don't split a wide char */
1560 if (isWidecExt(newLine[nLastChar]) &&
1561 !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1]))
1565 if (nLastChar == -1 || oLastChar == -1)
1569 n = min(oLastChar, nLastChar);
1570 if (n >= firstChar) {
1571 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1572 PutRange(NCURSES_SP_ARGx
1580 if (oLastChar < nLastChar) {
1581 int m = max(nLastNonblank, oLastNonblank);
1582 #if USE_WIDEC_SUPPORT
1584 while (isWidecExt(newLine[n + 1]) && n) {
1586 --oLastChar; /* increase cost */
1588 } else if (n >= firstChar &&
1589 isWidecBase(newLine[n])) {
1590 while (isWidecExt(newLine[n + 1])) {
1592 ++oLastChar; /* decrease cost */
1596 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1597 if ((nLastChar < nLastNonblank)
1598 || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) {
1599 PutRange(NCURSES_SP_ARGx
1606 InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar);
1608 } else if (oLastChar > nLastChar) {
1609 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1610 if (DelCharCost(SP_PARM, oLastChar - nLastChar)
1611 > SP_PARM->_el_cost + nLastNonblank - (n + 1)) {
1612 if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno,
1613 n + 1, nLastNonblank)) {
1614 GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1);
1616 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1619 * The delete-char sequence will
1620 * effectively shift in blanks from the
1621 * right margin of the screen. Ensure
1622 * that they are the right color by
1623 * setting the video attributes from
1624 * the last character on the row.
1626 UpdateAttrs(SP_PARM, blank);
1627 DelChar(NCURSES_SP_ARGx oLastChar - nLastChar);
1633 /* update the code's internal representation */
1634 if (screen_columns(SP_PARM) > firstChar)
1635 memcpy(oldLine + firstChar,
1636 newLine + firstChar,
1637 (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T));
1638 TR(TRACE_UPDATE, (T_RETURN("")));
1643 ** ClearScreen(blank)
1645 ** Clear the physical screen and put cursor at home
1650 ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank)
1653 bool fast_clear = (clear_screen || clr_eos || clr_eol);
1655 TR(TRACE_UPDATE, ("ClearScreen() called"));
1657 #if NCURSES_EXT_FUNCS
1658 if (SP_PARM->_coloron
1659 && !SP_PARM->_default_color) {
1660 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
1661 (short) GET_SCREEN_PAIR(SP_PARM),
1664 NCURSES_SP_NAME(_nc_outch));
1665 if (!back_color_erase) {
1673 UpdateAttrs(SP_PARM, blank);
1674 NCURSES_PUTP2("clear_screen", clear_screen);
1675 SP_PARM->_cursrow = SP_PARM->_curscol = 0;
1676 position_check(NCURSES_SP_ARGx
1680 } else if (clr_eos) {
1681 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1682 GoTo(NCURSES_SP_ARGx 0, 0);
1683 UpdateAttrs(SP_PARM, blank);
1684 TPUTS_TRACE("clr_eos");
1685 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1687 screen_lines(SP_PARM),
1688 NCURSES_SP_NAME(_nc_outch));
1689 } else if (clr_eol) {
1690 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1691 UpdateAttrs(SP_PARM, blank);
1692 for (i = 0; i < screen_lines(SP_PARM); i++) {
1693 GoTo(NCURSES_SP_ARGx i, 0);
1694 NCURSES_PUTP2("clr_eol", clr_eol);
1696 GoTo(NCURSES_SP_ARGx 0, 0);
1699 UpdateAttrs(SP_PARM, blank);
1700 for (i = 0; i < screen_lines(SP_PARM); i++) {
1701 GoTo(NCURSES_SP_ARGx i, 0);
1702 for (j = 0; j < screen_columns(SP_PARM); j++)
1703 PutChar(NCURSES_SP_ARGx CHREF(blank));
1705 GoTo(NCURSES_SP_ARGx 0, 0);
1708 for (i = 0; i < screen_lines(SP_PARM); i++) {
1709 for (j = 0; j < screen_columns(SP_PARM); j++)
1710 CurScreen(SP_PARM)->_line[i].text[j] = blank;
1713 TR(TRACE_UPDATE, ("screen cleared"));
1717 ** InsStr(line, count)
1719 ** Insert the count characters pointed to by line.
1724 InsStr(NCURSES_SP_DCLx NCURSES_CH_T * line, int count)
1726 TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called",
1728 (void *) line, count));
1730 /* Prefer parm_ich as it has the smallest cost - no need to shift
1731 * the whole line on each character. */
1732 /* The order must match that of InsCharCost. */
1734 TPUTS_TRACE("parm_ich");
1735 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1736 TPARM_1(parm_ich, count),
1738 NCURSES_SP_NAME(_nc_outch));
1740 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1744 } else if (enter_insert_mode && exit_insert_mode) {
1745 NCURSES_PUTP2("enter_insert_mode", enter_insert_mode);
1747 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1748 if (insert_padding) {
1749 NCURSES_PUTP2("insert_padding", insert_padding);
1754 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
1757 NCURSES_PUTP2("insert_character", insert_character);
1758 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1759 if (insert_padding) {
1760 NCURSES_PUTP2("insert_padding", insert_padding);
1766 position_check(NCURSES_SP_ARGx
1768 SP_PARM->_curscol, "InsStr");
1774 ** Delete count characters at current position
1779 DelChar(NCURSES_SP_DCLx int count)
1783 TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)",
1784 (void *) SP_PARM, count,
1785 (long) NewScreen(SP_PARM)->_cury,
1786 (long) NewScreen(SP_PARM)->_curx));
1789 TPUTS_TRACE("parm_dch");
1790 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1791 TPARM_1(parm_dch, count),
1793 NCURSES_SP_NAME(_nc_outch));
1795 for (n = 0; n < count; n++) {
1796 NCURSES_PUTP2("delete_character", delete_character);
1802 * Physical-scrolling support
1804 * This code was adapted from Keith Bostic's hardware scrolling
1805 * support for 4.4BSD curses. I (esr) translated it to use terminfo
1806 * capabilities, narrowed the call interface slightly, and cleaned
1807 * up some convoluted tests. I also added support for the memory_above
1808 * memory_below, and non_dest_scroll_region capabilities.
1810 * For this code to work, we must have either
1811 * change_scroll_region and scroll forward/reverse commands, or
1812 * insert and delete line capabilities.
1813 * When the scrolling region has been set, the cursor has to
1814 * be at the last line of the region to make the scroll up
1815 * happen, or on the first line of region to scroll down.
1817 * This code makes one aesthetic decision in the opposite way from
1818 * BSD curses. BSD curses preferred pairs of il/dl operations
1819 * over scrolls, allegedly because il/dl looked faster. We, on
1820 * the other hand, prefer scrolls because (a) they're just as fast
1821 * on many terminals and (b) using them avoids bouncing an
1822 * unchanged bottom section of the screen up and down, which is
1825 * (lav): added more cases, used dl/il when bot==maxy and in csr case.
1827 * I used assumption that capabilities il/il1/dl/dl1 work inside
1828 * changed scroll region not shifting screen contents outside of it.
1829 * If there are any terminals behaving different way, it would be
1830 * necessary to add some conditions to scroll_csr_forward/backward.
1833 /* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */
1835 scroll_csr_forward(NCURSES_SP_DCLx
1845 if (n == 1 && scroll_forward && top == miny && bot == maxy) {
1846 GoTo(NCURSES_SP_ARGx bot, 0);
1847 UpdateAttrs(SP_PARM, blank);
1848 NCURSES_PUTP2("scroll_forward", scroll_forward);
1849 } else if (n == 1 && delete_line && bot == maxy) {
1850 GoTo(NCURSES_SP_ARGx top, 0);
1851 UpdateAttrs(SP_PARM, blank);
1852 NCURSES_PUTP2("delete_line", delete_line);
1853 } else if (parm_index && top == miny && bot == maxy) {
1854 GoTo(NCURSES_SP_ARGx bot, 0);
1855 UpdateAttrs(SP_PARM, blank);
1856 TPUTS_TRACE("parm_index");
1857 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1858 TPARM_2(parm_index, n, 0),
1860 NCURSES_SP_NAME(_nc_outch));
1861 } else if (parm_delete_line && bot == maxy) {
1862 GoTo(NCURSES_SP_ARGx top, 0);
1863 UpdateAttrs(SP_PARM, blank);
1864 TPUTS_TRACE("parm_delete_line");
1865 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1866 TPARM_2(parm_delete_line, n, 0),
1868 NCURSES_SP_NAME(_nc_outch));
1869 } else if (scroll_forward && top == miny && bot == maxy) {
1870 GoTo(NCURSES_SP_ARGx bot, 0);
1871 UpdateAttrs(SP_PARM, blank);
1872 for (i = 0; i < n; i++) {
1873 NCURSES_PUTP2("scroll_forward", scroll_forward);
1875 } else if (delete_line && bot == maxy) {
1876 GoTo(NCURSES_SP_ARGx top, 0);
1877 UpdateAttrs(SP_PARM, blank);
1878 for (i = 0; i < n; i++) {
1879 NCURSES_PUTP2("delete_line", delete_line);
1884 #if NCURSES_EXT_FUNCS
1885 if (FILL_BCE(SP_PARM)) {
1887 for (i = 0; i < n; i++) {
1888 GoTo(NCURSES_SP_ARGx bot - i, 0);
1889 for (j = 0; j < screen_columns(SP_PARM); j++)
1890 PutChar(NCURSES_SP_ARGx CHREF(blank));
1897 /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */
1900 scroll_csr_backward(NCURSES_SP_DCLx
1910 if (n == 1 && scroll_reverse && top == miny && bot == maxy) {
1911 GoTo(NCURSES_SP_ARGx top, 0);
1912 UpdateAttrs(SP_PARM, blank);
1913 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1914 } else if (n == 1 && insert_line && bot == maxy) {
1915 GoTo(NCURSES_SP_ARGx top, 0);
1916 UpdateAttrs(SP_PARM, blank);
1917 NCURSES_PUTP2("insert_line", insert_line);
1918 } else if (parm_rindex && top == miny && bot == maxy) {
1919 GoTo(NCURSES_SP_ARGx top, 0);
1920 UpdateAttrs(SP_PARM, blank);
1921 TPUTS_TRACE("parm_rindex");
1922 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1923 TPARM_2(parm_rindex, n, 0),
1925 NCURSES_SP_NAME(_nc_outch));
1926 } else if (parm_insert_line && bot == maxy) {
1927 GoTo(NCURSES_SP_ARGx top, 0);
1928 UpdateAttrs(SP_PARM, blank);
1929 TPUTS_TRACE("parm_insert_line");
1930 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1931 TPARM_2(parm_insert_line, n, 0),
1933 NCURSES_SP_NAME(_nc_outch));
1934 } else if (scroll_reverse && top == miny && bot == maxy) {
1935 GoTo(NCURSES_SP_ARGx top, 0);
1936 UpdateAttrs(SP_PARM, blank);
1937 for (i = 0; i < n; i++) {
1938 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1940 } else if (insert_line && bot == maxy) {
1941 GoTo(NCURSES_SP_ARGx top, 0);
1942 UpdateAttrs(SP_PARM, blank);
1943 for (i = 0; i < n; i++) {
1944 NCURSES_PUTP2("insert_line", insert_line);
1949 #if NCURSES_EXT_FUNCS
1950 if (FILL_BCE(SP_PARM)) {
1952 for (i = 0; i < n; i++) {
1953 GoTo(NCURSES_SP_ARGx top + i, 0);
1954 for (j = 0; j < screen_columns(SP_PARM); j++)
1955 PutChar(NCURSES_SP_ARGx CHREF(blank));
1962 /* scroll by using delete_line at del and insert_line at ins */
1965 scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank)
1969 if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line)))
1972 GoTo(NCURSES_SP_ARGx del, 0);
1973 UpdateAttrs(SP_PARM, blank);
1974 if (n == 1 && delete_line) {
1975 NCURSES_PUTP2("delete_line", delete_line);
1976 } else if (parm_delete_line) {
1977 TPUTS_TRACE("parm_delete_line");
1978 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1979 TPARM_2(parm_delete_line, n, 0),
1981 NCURSES_SP_NAME(_nc_outch));
1982 } else { /* if (delete_line) */
1983 for (i = 0; i < n; i++) {
1984 NCURSES_PUTP2("delete_line", delete_line);
1988 GoTo(NCURSES_SP_ARGx ins, 0);
1989 UpdateAttrs(SP_PARM, blank);
1990 if (n == 1 && insert_line) {
1991 NCURSES_PUTP2("insert_line", insert_line);
1992 } else if (parm_insert_line) {
1993 TPUTS_TRACE("parm_insert_line");
1994 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1995 TPARM_2(parm_insert_line, n, 0),
1997 NCURSES_SP_NAME(_nc_outch));
1998 } else { /* if (insert_line) */
1999 for (i = 0; i < n; i++) {
2000 NCURSES_PUTP2("insert_line", insert_line);
2008 * Note: some terminals require the cursor to be within the scrolling margins
2009 * before setting them. Generally, the cursor must be at the appropriate end
2010 * of the scrolling margins when issuing an indexing operation (it is not
2011 * apparent whether it must also be at the left margin; we do this just to be
2012 * safe). To make the related cursor movement a little faster, we use the
2013 * save/restore cursor capabilities if the terminal has them.
2016 NCURSES_SP_NAME(_nc_scrolln) (NCURSES_SP_DCLx
2021 /* scroll region from top to bot by n lines */
2025 bool cursor_saved = FALSE;
2028 TR(TRACE_MOVE, ("_nc_scrolln(%p, %d, %d, %d, %d)",
2029 (void *) SP_PARM, n, top, bot, maxy));
2031 if (!IsValidScreen(SP_PARM))
2034 blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
2038 * If we scroll, we might remove a cookie.
2040 if (magic_cookie_glitch > 0) {
2045 if (n > 0) { /* scroll up (forward) */
2047 * Explicitly clear if stuff pushed off top of region might
2048 * be saved by the terminal.
2050 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, 0, maxy, blank);
2052 if (res == ERR && change_scroll_region) {
2053 if ((((n == 1 && scroll_forward) || parm_index)
2054 && (SP_PARM->_cursrow == bot || SP_PARM->_cursrow == bot - 1))
2055 && save_cursor && restore_cursor) {
2056 cursor_saved = TRUE;
2057 NCURSES_PUTP2("save_cursor", save_cursor);
2059 NCURSES_PUTP2("change_scroll_region",
2060 TPARM_2(change_scroll_region, top, bot));
2062 NCURSES_PUTP2("restore_cursor", restore_cursor);
2064 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2067 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank);
2069 NCURSES_PUTP2("change_scroll_region",
2070 TPARM_2(change_scroll_region, 0, maxy));
2071 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2074 if (res == ERR && SP_PARM->_nc_sp_idlok)
2075 res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank);
2078 * Clear the newly shifted-in text.
2081 && (non_dest_scroll_region || (memory_below && bot == maxy))) {
2082 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2083 if (bot == maxy && clr_eos) {
2084 GoTo(NCURSES_SP_ARGx bot - n + 1, 0);
2085 ClrToEOS(NCURSES_SP_ARGx blank2);
2087 for (i = 0; i < n; i++) {
2088 GoTo(NCURSES_SP_ARGx bot - i, 0);
2089 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2094 } else { /* (n < 0) - scroll down (backward) */
2095 res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank);
2097 if (res == ERR && change_scroll_region) {
2099 && (SP_PARM->_cursrow == top ||
2100 SP_PARM->_cursrow == top - 1)
2101 && save_cursor && restore_cursor) {
2102 cursor_saved = TRUE;
2103 NCURSES_PUTP2("save_cursor", save_cursor);
2105 NCURSES_PUTP2("change_scroll_region",
2106 TPARM_2(change_scroll_region, top, bot));
2108 NCURSES_PUTP2("restore_cursor", restore_cursor);
2110 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2113 res = scroll_csr_backward(NCURSES_SP_ARGx
2114 -n, top, bot, top, bot, blank);
2116 NCURSES_PUTP2("change_scroll_region",
2117 TPARM_2(change_scroll_region, 0, maxy));
2118 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2121 if (res == ERR && SP_PARM->_nc_sp_idlok)
2122 res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank);
2125 * Clear the newly shifted-in text.
2128 && (non_dest_scroll_region || (memory_above && top == 0))) {
2129 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2130 for (i = 0; i < -n; i++) {
2131 GoTo(NCURSES_SP_ARGx i + top, 0);
2132 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2140 _nc_scroll_window(CurScreen(SP_PARM), n,
2141 (NCURSES_SIZE_T) top,
2142 (NCURSES_SIZE_T) bot,
2145 /* shift hash values too - they can be reused */
2146 NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot);
2151 #if NCURSES_SP_FUNCS
2153 _nc_scrolln(int n, int top, int bot, int maxy)
2155 return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy);
2159 NCURSES_EXPORT(void)
2160 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0)
2164 /* make sure terminal is in a sane known state */
2165 SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL);
2166 NewScreen(SP_PARM)->_clear = TRUE;
2168 /* reset color pairs and definitions */
2169 if (SP_PARM->_coloron || SP_PARM->_color_defs)
2170 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2172 /* restore user-defined colors, if any */
2173 if (SP_PARM->_color_defs < 0) {
2175 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
2176 for (n = 0; n < SP_PARM->_color_defs; ++n) {
2177 if (SP_PARM->_color_table[n].init) {
2178 NCURSES_SP_NAME(init_color) (NCURSES_SP_ARGx
2180 SP_PARM->_color_table[n].r,
2181 SP_PARM->_color_table[n].g,
2182 SP_PARM->_color_table[n].b);
2187 if (exit_attribute_mode)
2188 NCURSES_PUTP2("exit_attribute_mode", exit_attribute_mode);
2190 /* turn off attributes */
2191 if (exit_alt_charset_mode)
2192 NCURSES_PUTP2("exit_alt_charset_mode", exit_alt_charset_mode);
2193 if (exit_standout_mode)
2194 NCURSES_PUTP2("exit_standout_mode", exit_standout_mode);
2195 if (exit_underline_mode)
2196 NCURSES_PUTP2("exit_underline_mode", exit_underline_mode);
2198 if (exit_insert_mode)
2199 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
2200 if (enter_am_mode && exit_am_mode) {
2201 if (auto_right_margin) {
2202 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
2204 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
2209 #if NCURSES_SP_FUNCS
2210 NCURSES_EXPORT(void)
2211 _nc_screen_resume(void)
2213 NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN);
2217 NCURSES_EXPORT(void)
2218 NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0)
2220 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
2223 #if NCURSES_SP_FUNCS
2224 NCURSES_EXPORT(void)
2225 _nc_screen_init(void)
2227 NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN);
2231 /* wrap up screen handling */
2232 NCURSES_EXPORT(void)
2233 NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0)
2237 UpdateAttrs(SP_PARM, normal);
2238 #if NCURSES_EXT_FUNCS
2239 if (SP_PARM->_coloron
2240 && !SP_PARM->_default_color) {
2241 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
2242 SP_PARM->_default_color = TRUE;
2243 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
2247 NCURSES_SP_NAME(_nc_outch));
2248 SP_PARM->_default_color = FALSE;
2250 TINFO_MVCUR(NCURSES_SP_ARGx
2253 screen_lines(SP_PARM) - 1,
2256 ClrToEOL(NCURSES_SP_ARGx blank, TRUE);
2259 if (SP_PARM->_color_defs) {
2260 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2265 #if NCURSES_SP_FUNCS
2266 NCURSES_EXPORT(void)
2267 _nc_screen_wrap(void)
2269 NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN);
2274 NCURSES_EXPORT(void)
2275 NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous)
2278 attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM)));
2282 SP_PARM->_curscol += magic_cookie_glitch;
2283 if (SP_PARM->_curscol >= SP_PARM->_columns)
2284 wrap_cursor(NCURSES_SP_ARG);
2285 TR(TRACE_UPDATE, ("bumped to %d,%d after cookie",
2286 SP_PARM->_cursrow, SP_PARM->_curscol));
2293 #if NCURSES_SP_FUNCS
2294 NCURSES_EXPORT(void)
2295 _nc_do_xmc_glitch(attr_t previous)
2297 NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous);
2301 #endif /* USE_XMC_SUPPORT */