1 /****************************************************************************
2 * Copyright (c) 1998-2016,2017 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 #define NEW_PAIR_INTERNAL 1
48 #include <curses.priv.h>
51 #define CUR SP_TERMTYPE
54 #if defined __HAIKU__ && defined __BEOS__
64 #if defined(TRACE) && HAVE_SYS_TIMES_H && HAVE_TIMES
65 #define USE_TRACE_TIMES 1
67 #define USE_TRACE_TIMES 0
70 #if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT
75 #include <sys/times.h>
81 #include <sys/select.h>
87 MODULE_ID("$Id: tty_update.c,v 1.296 2017/08/27 19:40:17 tom Exp $")
90 * This define controls the line-breakout optimization. Every once in a
91 * while during screen refresh, we want to check for input and abort the
92 * update if there's some waiting. CHECK_INTERVAL controls the number of
93 * changed lines to be emitted between input checks.
95 * Note: Input-check-and-abort is no longer done if the screen is being
96 * updated from scratch. This is a feature, not a bug.
98 #define CHECK_INTERVAL 5
100 #define FILL_BCE(sp) (sp->_coloron && !sp->_default_color && !back_color_erase)
102 static const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT);
103 static NCURSES_CH_T normal = NewChar(BLANK_TEXT);
106 * Enable checking to see if doupdate and friends are tracking the true
107 * cursor position correctly. NOTE: this is a debugging hack which will
108 * work ONLY on ANSI-compatible terminals!
110 /* #define POSITION_DEBUG */
112 static NCURSES_INLINE NCURSES_CH_T ClrBlank(NCURSES_SP_DCLx WINDOW *win);
115 static int ClrBottom(SCREEN *, int total);
116 static void ClearScreen(SCREEN *, NCURSES_CH_T blank);
117 static void ClrUpdate(SCREEN *);
118 static void DelChar(SCREEN *, int count);
119 static void InsStr(SCREEN *, NCURSES_CH_T * line, int count);
120 static void TransformLine(SCREEN *, int const lineno);
122 static int ClrBottom(int total);
123 static void ClearScreen(NCURSES_CH_T blank);
124 static void ClrUpdate(void);
125 static void DelChar(int count);
126 static void InsStr(NCURSES_CH_T * line, int count);
127 static void TransformLine(int const lineno);
130 #ifdef POSITION_DEBUG
131 /****************************************************************************
133 * Debugging code. Only works on ANSI-standard terminals.
135 ****************************************************************************/
138 position_check(NCURSES_SP_DCLx int expected_y, int expected_x, char *legend)
139 /* check to see if the real cursor position matches the virtual */
145 if (!_nc_tracing || (expected_y < 0 && expected_x < 0))
148 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
149 memset(buf, '\0', sizeof(buf));
150 NCURSES_PUTP2_FLUSH("cpr", "\033[6n"); /* only works on ANSI-compatibles */
153 int ask = sizeof(buf) - 1 - (s - buf);
154 int got = read(0, s, ask);
158 } while (strchr(buf, 'R') == 0);
159 _tracef("probe returned %s", _nc_visbuf(buf));
161 /* try to interpret as a position report */
162 if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) {
163 _tracef("position probe failed in %s", legend);
169 if (y - 1 != expected_y || x - 1 != expected_x) {
170 NCURSES_SP_NAME(beep) (NCURSES_SP_ARG);
171 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
175 1, NCURSES_SP_NAME(_nc_outch));
176 _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s",
177 y - 1, x - 1, expected_y, expected_x, legend);
179 _tracef("position matches OK in %s", legend);
184 #define position_check(expected_y, expected_x, legend) /* nothing */
185 #endif /* POSITION_DEBUG */
187 /****************************************************************************
189 * Optimized update code
191 ****************************************************************************/
193 static NCURSES_INLINE void
194 GoTo(NCURSES_SP_DCLx int const row, int const col)
196 TR(TRACE_MOVE, ("GoTo(%p, %d, %d) from (%d, %d)",
197 (void *) SP_PARM, row, col, SP_PARM->_cursrow, SP_PARM->_curscol));
199 position_check(NCURSES_SP_ARGx
201 SP_PARM->_curscol, "GoTo");
203 TINFO_MVCUR(NCURSES_SP_ARGx
207 position_check(NCURSES_SP_ARGx
209 SP_PARM->_curscol, "GoTo2");
212 #if !NCURSES_WCWIDTH_GRAPHICS
214 is_wacs_value(unsigned ch)
218 case 0x00a3: /* FALLTHRU - ncurses pound-sterling symbol */
219 case 0x00b0: /* FALLTHRU - VT100 degree symbol */
220 case 0x00b1: /* FALLTHRU - VT100 plus/minus */
221 case 0x00b7: /* FALLTHRU - VT100 bullet */
222 case 0x03c0: /* FALLTHRU - ncurses greek pi */
223 case 0x2190: /* FALLTHRU - Teletype arrow pointing left */
224 case 0x2191: /* FALLTHRU - Teletype arrow pointing up */
225 case 0x2192: /* FALLTHRU - Teletype arrow pointing right */
226 case 0x2193: /* FALLTHRU - Teletype arrow pointing down */
227 case 0x2260: /* FALLTHRU - ncurses not-equal */
228 case 0x2264: /* FALLTHRU - ncurses less-than-or-equal-to */
229 case 0x2265: /* FALLTHRU - ncurses greater-than-or-equal-to */
230 case 0x23ba: /* FALLTHRU - VT100 scan line 1 */
231 case 0x23bb: /* FALLTHRU - ncurses scan line 3 */
232 case 0x23bc: /* FALLTHRU - ncurses scan line 7 */
233 case 0x23bd: /* FALLTHRU - VT100 scan line 9 */
234 case 0x2500: /* FALLTHRU - VT100 horizontal line */
235 case 0x2501: /* FALLTHRU - thick horizontal line */
236 case 0x2502: /* FALLTHRU - VT100 vertical line */
237 case 0x2503: /* FALLTHRU - thick vertical line */
238 case 0x250c: /* FALLTHRU - VT100 upper left corner */
239 case 0x250f: /* FALLTHRU - thick upper left corner */
240 case 0x2510: /* FALLTHRU - VT100 upper right corner */
241 case 0x2513: /* FALLTHRU - thick upper right corner */
242 case 0x2514: /* FALLTHRU - VT100 lower left corner */
243 case 0x2517: /* FALLTHRU - thick lower left corner */
244 case 0x2518: /* FALLTHRU - VT100 lower right corner */
245 case 0x251b: /* FALLTHRU - thick lower right corner */
246 case 0x251c: /* FALLTHRU - VT100 tee pointing left */
247 case 0x2523: /* FALLTHRU - thick tee pointing left */
248 case 0x2524: /* FALLTHRU - VT100 tee pointing right */
249 case 0x252b: /* FALLTHRU - thick tee pointing right */
250 case 0x252c: /* FALLTHRU - VT100 tee pointing down */
251 case 0x2533: /* FALLTHRU - thick tee pointing down */
252 case 0x2534: /* FALLTHRU - VT100 tee pointing up */
253 case 0x253b: /* FALLTHRU - thick tee pointing up */
254 case 0x253c: /* FALLTHRU - VT100 large plus or crossover */
255 case 0x254b: /* FALLTHRU - thick large plus or crossover */
256 case 0x2550: /* FALLTHRU - double horizontal line */
257 case 0x2551: /* FALLTHRU - double vertical line */
258 case 0x2554: /* FALLTHRU - double upper left corner */
259 case 0x2557: /* FALLTHRU - double upper right corner */
260 case 0x255a: /* FALLTHRU - double lower left corner */
261 case 0x255d: /* FALLTHRU - double lower right corner */
262 case 0x2560: /* FALLTHRU - double tee pointing right */
263 case 0x2563: /* FALLTHRU - double tee pointing left */
264 case 0x2566: /* FALLTHRU - double tee pointing down */
265 case 0x2569: /* FALLTHRU - double tee pointing up */
266 case 0x256c: /* FALLTHRU - double large plus or crossover */
267 case 0x2592: /* FALLTHRU - VT100 checker board (stipple) */
268 case 0x25ae: /* FALLTHRU - Teletype solid square block */
269 case 0x25c6: /* FALLTHRU - VT100 diamond */
270 case 0x2603: /* FALLTHRU - Teletype lantern symbol */
281 static NCURSES_INLINE void
282 PutAttrChar(NCURSES_SP_DCLx CARG_CH_T ch)
286 #if USE_WIDEC_SUPPORT
290 NCURSES_CH_T attr = CHDEREF(ch);
292 TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)",
294 SP_PARM->_cursrow, SP_PARM->_curscol));
295 #if USE_WIDEC_SUPPORT
297 * If this is not a valid character, there is nothing more to do.
299 if (isWidecExt(CHDEREF(ch))) {
300 TR(TRACE_CHARPUT, ("...skip"));
304 * Determine the number of character cells which the 'ch' value will use
305 * on the screen. It should be at least one.
307 if ((chlen = wcwidth(CharOf(CHDEREF(ch)))) <= 0) {
308 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
311 * If the character falls into any of these special cases, do
312 * not force the result to a blank:
314 * a) it is printable (this works around a bug in wcwidth()).
315 * b) use_legacy_coding() has been called to modify the treatment
317 * c) the acs_map[] has been initialized to allow codes 0-31
318 * to be rendered. This supports Linux console's "PC"
319 * characters. Codes 128-255 are allowed though this is
322 if (is8bits(CharOf(CHDEREF(ch)))
323 && (isprint(CharOf(CHDEREF(ch)))
324 || (SP_PARM->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160)
325 || (SP_PARM->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128)
326 || (AttrOf(attr) & A_ALTCHARSET
327 && ((CharOfD(ch) < ACS_LEN
328 && SP_PARM->_acs_map != 0
329 && SP_PARM->_acs_map[CharOfD(ch)] != 0)
330 || (CharOfD(ch) >= 128))))) {
334 TR(TRACE_CHARPUT, ("forced to blank"));
340 if ((AttrOf(attr) & A_ALTCHARSET)
341 && SP_PARM->_acs_map != 0
342 && ((CharOfD(ch) < ACS_LEN)
343 #if !NCURSES_WCWIDTH_GRAPHICS
344 || is_wacs_value(CharOfD(ch))
347 my_ch = CHDEREF(ch); /* work around const param */
348 #if USE_WIDEC_SUPPORT
350 * This is crude & ugly, but works most of the time. It checks if the
351 * acs_chars string specified that we have a mapping for this
352 * character, and uses the wide-character mapping when we expect the
353 * normal one to be broken (by mis-design ;-).
355 if (SP_PARM->_screen_unicode
356 && _nc_wacs[CharOf(my_ch)].chars[0]) {
357 if (SP_PARM->_screen_acs_map[CharOf(my_ch)]) {
358 if (SP_PARM->_screen_acs_fix) {
359 RemAttr(attr, A_ALTCHARSET);
360 my_ch = _nc_wacs[CharOf(my_ch)];
363 RemAttr(attr, A_ALTCHARSET);
364 my_ch = _nc_wacs[CharOf(my_ch)];
366 #if !NCURSES_WCWIDTH_GRAPHICS
367 if (!(AttrOf(attr) & A_ALTCHARSET)) {
370 #endif /* !NCURSES_WCWIDTH_GRAPHICS */
374 * If we (still) have alternate character set, it is the normal 8bit
375 * flavor. The _screen_acs_map[] array tells if the character was
376 * really in acs_chars, needed because of the way wide/normal line
377 * drawing flavors are integrated.
379 if (AttrOf(attr) & A_ALTCHARSET) {
381 chtype temp = UChar(SP_PARM->_acs_map[j]);
384 SetChar(my_ch, temp, AttrOf(attr));
387 RemAttr(attr, A_ALTCHARSET);
392 #if USE_WIDEC_SUPPORT && !NCURSES_WCWIDTH_GRAPHICS
393 else if (chlen > 1 && is_wacs_value(CharOfD(ch))) {
397 if (tilde_glitch && (CharOfD(ch) == L('~'))) {
398 SetChar(tilde, L('`'), AttrOf(attr));
402 UpdateAttrs(SP_PARM, attr);
404 #if !USE_WIDEC_SUPPORT
407 SP_PARM->_curscol += chlen;
409 NCURSES_PUTP2("char_padding", char_padding);
414 check_pending(NCURSES_SP_DCL0)
415 /* check for pending input */
417 bool have_pending = FALSE;
420 * Only carry out this check when the flag is zero, otherwise we'll
421 * have the refreshing slow down drastically (or stop) if there's an
422 * unread character available.
424 if (SP_PARM->_fifohold != 0)
427 if (SP_PARM->_checkfd >= 0) {
429 struct pollfd fds[1];
430 fds[0].fd = SP_PARM->_checkfd;
431 fds[0].events = POLLIN;
432 if (poll(fds, (size_t) 1, 0) > 0) {
435 #elif defined(__BEOS__)
437 * BeOS's select() is declared in socket.h, so the configure script does
438 * not see it. That's just as well, since that function works only for
439 * sockets. This (using snooze and ioctl) was distilled from Be's patch
440 * for ncurses which uses a separate thread to simulate select().
442 * FIXME: the return values from the ioctl aren't very clear if we get
446 int howmany = ioctl(0, 'ichr', &n);
447 if (howmany >= 0 && n > 0) {
452 struct timeval ktimeout;
455 ktimeout.tv_usec = 0;
458 FD_SET(SP_PARM->_checkfd, &fdset);
459 if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) {
465 SP_PARM->_fifohold = 5;
466 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
471 /* put char at lower right corner */
473 PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch)
475 if (!auto_right_margin) {
476 /* we can put the char directly */
477 PutAttrChar(NCURSES_SP_ARGx ch);
478 } else if (enter_am_mode && exit_am_mode) {
479 /* we can suppress automargin */
480 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
482 PutAttrChar(NCURSES_SP_ARGx ch);
484 position_check(NCURSES_SP_ARGx
489 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
490 } else if ((enter_insert_mode && exit_insert_mode)
491 || insert_character || parm_ich) {
493 screen_lines(SP_PARM) - 1,
494 screen_columns(SP_PARM) - 2);
495 PutAttrChar(NCURSES_SP_ARGx ch);
497 screen_lines(SP_PARM) - 1,
498 screen_columns(SP_PARM) - 2);
499 InsStr(NCURSES_SP_ARGx
500 NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text +
501 screen_columns(SP_PARM) - 2, 1);
506 * Wrap the cursor position, i.e., advance to the beginning of the next line.
509 wrap_cursor(NCURSES_SP_DCL0)
511 if (eat_newline_glitch) {
513 * xenl can manifest two different ways. The vt100 way is that, when
514 * you'd expect the cursor to wrap, it stays hung at the right margin
515 * (on top of the character just emitted) and doesn't wrap until the
516 * *next* graphic char is emitted. The c100 way is to ignore LF
517 * received just after an am wrap.
519 * An aggressive way to handle this would be to emit CR/LF after the
520 * char and then assume the wrap is done, you're on the first position
521 * of the next line, and the terminal out of its weird state. Here
522 * it's safe to just tell the code that the cursor is in hyperspace and
523 * let the next mvcur() call straighten things out.
525 SP_PARM->_curscol = -1;
526 SP_PARM->_cursrow = -1;
527 } else if (auto_right_margin) {
528 SP_PARM->_curscol = 0;
531 * We've actually moved - but may have to work around problems with
532 * video attributes not working.
534 if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) {
535 TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping",
536 (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)),
537 _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM)))));
538 (void) VIDATTR(SP_PARM, A_NORMAL, 0);
543 position_check(NCURSES_SP_ARGx
549 static NCURSES_INLINE void
550 PutChar(NCURSES_SP_DCLx const ARG_CH_T ch)
551 /* insert character, handling automargin stuff */
553 if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 &&
554 SP_PARM->_curscol == screen_columns(SP_PARM) - 1) {
555 PutCharLR(NCURSES_SP_ARGx ch);
557 PutAttrChar(NCURSES_SP_ARGx ch);
560 if (SP_PARM->_curscol >= screen_columns(SP_PARM))
561 wrap_cursor(NCURSES_SP_ARG);
563 position_check(NCURSES_SP_ARGx
565 SP_PARM->_curscol, "PutChar");
569 * Check whether the given character can be output by clearing commands. This
570 * includes test for being a space and not including any 'bad' attributes, such
571 * as A_REVERSE. All attribute flags which don't affect appearance of a space
572 * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded.
574 static NCURSES_INLINE bool
575 can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch)
577 if (!back_color_erase && SP_PARM->_coloron) {
578 #if NCURSES_EXT_FUNCS
581 if (!SP_PARM->_default_color)
583 if (!(isDefaultColor(SP_PARM->_default_fg) &&
584 isDefaultColor(SP_PARM->_default_bg)))
586 if ((pair = GetPair(CHDEREF(ch))) != 0) {
587 NCURSES_COLOR_T fg, bg;
588 if (NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx
591 || !(isDefaultColor(fg) && isDefaultColor(bg))) {
596 if (AttrOfD(ch) & A_COLOR)
600 return (ISBLANK(CHDEREF(ch)) &&
601 (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR);
605 * Issue a given span of characters from an array.
606 * Must be functionally equivalent to:
607 * for (i = 0; i < num; i++)
609 * but can leave the cursor positioned at the middle of the interval.
611 * Returns: 0 - cursor is at the end of interval
612 * 1 - cursor is somewhere in the middle
614 * This code is optimized using ech and rep.
617 EmitRange(NCURSES_SP_DCLx const NCURSES_CH_T * ntext, int num)
621 TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num)));
623 if (erase_chars || repeat_char) {
628 while (num > 1 && !CharEq(ntext[0], ntext[1])) {
629 PutChar(NCURSES_SP_ARGx CHREF(ntext[0]));
635 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
640 while (runcount < num && CharEq(ntext[runcount], ntext0))
644 * The cost expression in the middle isn't exactly right.
645 * _cup_ch_cost is an upper bound on the cost for moving to the
646 * end of the erased area, but not the cost itself (which we
647 * can't compute without emitting the move). This may result
648 * in erase_chars not getting used in some situations for
649 * which it would be marginally advantageous.
652 && runcount > SP_PARM->_ech_cost + SP_PARM->_cup_ch_cost
653 && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) {
654 UpdateAttrs(SP_PARM, ntext0);
655 NCURSES_PUTP2("erase_chars", TPARM_1(erase_chars, runcount));
658 * If this is the last part of the given interval,
659 * don't bother moving cursor, since it can be the
660 * last update on the line.
662 if (runcount < num) {
665 SP_PARM->_curscol + runcount);
667 return 1; /* cursor stays in the middle */
669 } else if (repeat_char != 0 &&
670 #if USE_WIDEC_SUPPORT
671 (!SP_PARM->_screen_unicode &&
672 ((AttrOf(ntext0) & A_ALTCHARSET) == 0 ||
673 (CharOf(ntext0) < ACS_LEN))) &&
675 runcount > SP_PARM->_rep_cost) {
677 bool wrap_possible = (SP_PARM->_curscol + runcount >=
678 screen_columns(SP_PARM));
679 int rep_count = runcount;
684 UpdateAttrs(SP_PARM, ntext0);
686 if ((AttrOf(temp) & A_ALTCHARSET) &&
687 SP_PARM->_acs_map != 0 &&
688 (SP_PARM->_acs_map[CharOf(temp)] & A_CHARTEXT) != 0) {
690 (SP_PARM->_acs_map[CharOf(ntext0)] & A_CHARTEXT),
691 AttrOf(ntext0) | A_ALTCHARSET);
693 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
698 NCURSES_SP_NAME(_nc_outch));
699 SP_PARM->_curscol += rep_count;
702 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
704 for (i = 0; i < runcount; i++)
705 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
713 for (i = 0; i < num; i++)
714 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
719 * Output the line in the given range [first .. last]
721 * If there's a run of identical characters that's long enough to justify
722 * cursor movement, use that also.
724 * Returns: same as EmitRange
727 PutRange(NCURSES_SP_DCLx
728 const NCURSES_CH_T * otext,
729 const NCURSES_CH_T * ntext,
735 TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)",
737 (const void *) otext,
738 (const void *) ntext,
742 && (last - first + 1) > SP_PARM->_inline_cost) {
745 for (j = first, same = 0; j <= last; j++) {
746 if (!same && isWidecExt(otext[j]))
748 if (CharEq(otext[j], ntext[j])) {
751 if (same > SP_PARM->_inline_cost) {
752 EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
753 GoTo(NCURSES_SP_ARGx row, first = j);
758 i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
760 * Always return 1 for the next GoTo() after a PutRange() if we found
761 * identical characters at end of interval
763 rc = (same == 0 ? i : 1);
765 rc = EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1);
770 /* leave unbracketed here so 'indent' works */
771 #define MARK_NOCHANGE(win,row) \
772 win->_line[row].firstchar = _NOCHANGE; \
773 win->_line[row].lastchar = _NOCHANGE; \
774 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row)
777 TINFO_DOUPDATE(NCURSES_SP_DCL0)
782 struct tms before, after;
783 #endif /* USE_TRACE_TIMES */
785 T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM));
787 _nc_lock_global(update);
790 _nc_unlock_global(update);
795 * It is "legal" but unlikely that an application could assign a new
796 * value to one of the standard windows. Check for that possibility
797 * and try to recover.
799 * We do not allow applications to assign new values in the reentrant
802 #define SyncScreens(internal,exported) \
803 if (internal == 0) internal = exported; \
804 if (internal != exported) exported = internal
806 SyncScreens(CurScreen(SP_PARM), curscr);
807 SyncScreens(NewScreen(SP_PARM), newscr);
808 SyncScreens(StdScreen(SP_PARM), stdscr);
811 if (CurScreen(SP_PARM) == 0
812 || NewScreen(SP_PARM) == 0
813 || StdScreen(SP_PARM) == 0) {
814 _nc_unlock_global(update);
818 if (USE_TRACEF(TRACE_UPDATE)) {
819 if (CurScreen(SP_PARM)->_clear)
820 _tracef("curscr is clear");
822 _tracedump("curscr", CurScreen(SP_PARM));
823 _tracedump("newscr", NewScreen(SP_PARM));
824 _nc_unlock_global(tracef);
828 _nc_signal_handler(FALSE);
830 if (SP_PARM->_fifohold)
831 SP_PARM->_fifohold--;
834 if ((SP_PARM->_endwin == ewRunning)
835 || _nc_handle_sigwinch(SP_PARM)) {
837 * This is a transparent extension: XSI does not address it,
838 * and applications need not know that ncurses can do it.
840 * Check if the terminal size has changed while curses was off
841 * (this can happen in an xterm, for example), and resize the
842 * ncurses data structures accordingly.
844 _nc_update_screensize(SP_PARM);
848 if (SP_PARM->_endwin == ewSuspend) {
850 T(("coming back from shell mode"));
851 NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG);
853 NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG);
854 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
855 SP_PARM->_mouse_resume(SP_PARM);
857 SP_PARM->_endwin = ewRunning;
860 /* zero the metering machinery */
862 (void) times(&before);
863 #endif /* USE_TRACE_TIMES */
866 * This is the support for magic-cookie terminals. The theory: we scan
867 * the virtual screen looking for attribute turnons. Where we find one,
868 * check to make sure it's realizable by seeing if the required number of
869 * un-attributed blanks are present before and after the attributed range;
870 * try to shift the range boundaries over blanks (not changing the screen
871 * display) so this becomes true. If it is, shift the beginning attribute
872 * change appropriately (the end one, if we've gotten this far, is
873 * guaranteed room for its cookie). If not, nuke the added attributes out
877 if (magic_cookie_glitch > 0) {
879 attr_t rattr = A_NORMAL;
881 for (i = 0; i < screen_lines(SP_PARM); i++) {
882 for (j = 0; j < screen_columns(SP_PARM); j++) {
884 NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text;
885 attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers;
886 attr_t turnon = thisattr & ~rattr;
888 /* is an attribute turned on here? */
894 TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr)));
895 TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon)));
898 * If the attribute change location is a blank with a "safe"
899 * attribute, undo the attribute turnon. This may ensure
900 * there's enough room to set the attribute before the first
901 * non-blank in the run.
903 #define SAFE(scr,a) (!((a) & (scr)->_xmc_triggers))
904 if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) {
905 RemAttr(thisline[j], turnon);
909 /* check that there's enough room at start of span */
910 for (k = 1; k <= magic_cookie_glitch; k++) {
912 || !ISBLANK(thisline[j - k])
913 || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) {
915 TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s",
917 (ISBLANK(thisline[j - k])
920 (SAFE(SP_PARM, AttrOf(thisline[j - k]))
927 bool end_onscreen = FALSE;
930 /* find end of span, if it's onscreen */
931 for (m = i; m < screen_lines(SP_PARM); m++) {
932 for (; n < screen_columns(SP_PARM); n++) {
934 AttrOf(NewScreen(SP_PARM)->_line[m].text[n]);
935 if ((testattr & SP_PARM->_xmc_triggers) == rattr) {
938 ("Range attributed with %s ends at (%d, %d)",
939 _traceattr(turnon), m, n));
946 ("Range attributed with %s ends offscreen",
947 _traceattr(turnon)));
951 NCURSES_CH_T *lastline =
952 NewScreen(SP_PARM)->_line[m].text;
955 * If there are safely-attributed blanks at the end of
956 * the range, shorten the range. This will help ensure
957 * that there is enough room at end of span.
960 && ISBLANK(lastline[n])
961 && SAFE(SP_PARM, AttrOf(lastline[n]))) {
962 RemAttr(lastline[n--], turnon);
965 /* check that there's enough room at end of span */
966 for (k = 1; k <= magic_cookie_glitch; k++) {
967 if (n + k >= screen_columns(SP_PARM)
968 || !ISBLANK(lastline[n + k])
969 || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) {
972 ("No room at end in %d,%d%s%s",
974 (ISBLANK(lastline[n + k])
977 (SAFE(SP_PARM, AttrOf(lastline[n + k]))
990 ("Clearing %s beginning at (%d, %d)",
991 _traceattr(turnon), i, j));
993 /* turn off new attributes over span */
994 for (p = i; p < screen_lines(SP_PARM); p++) {
995 for (; q < screen_columns(SP_PARM); q++) {
996 attr_t testattr = AttrOf(newscr->_line[p].text[q]);
997 if ((testattr & SP_PARM->_xmc_triggers) == rattr)
999 RemAttr(NewScreen(SP_PARM)->_line[p].text[q], turnon);
1006 ("Cookie space for %s found before (%d, %d)",
1007 _traceattr(turnon), i, j));
1010 * Back up the start of range so there's room for cookies
1011 * before the first nonblank character.
1013 for (k = 1; k <= magic_cookie_glitch; k++)
1014 AddAttr(thisline[j - k], turnon);
1022 /* show altered highlights after magic-cookie check */
1023 if (USE_TRACEF(TRACE_UPDATE)) {
1024 _tracef("After magic-cookie check...");
1025 _tracedump("newscr", NewScreen(SP_PARM));
1026 _nc_unlock_global(tracef);
1030 #endif /* USE_XMC_SUPPORT */
1033 if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */
1034 ClrUpdate(NCURSES_SP_ARG);
1035 CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1036 NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1038 int changedlines = CHECK_INTERVAL;
1040 if (check_pending(NCURSES_SP_ARG))
1043 nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1);
1045 if (SP_PARM->_scrolling) {
1046 NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG);
1049 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1051 TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty));
1052 for (i = 0; i < nonempty; i++) {
1054 * Here is our line-breakout optimization.
1056 if (changedlines == CHECK_INTERVAL) {
1057 if (check_pending(NCURSES_SP_ARG))
1063 * newscr->line[i].firstchar is normally set
1064 * by wnoutrefresh. curscr->line[i].firstchar
1065 * is normally set by _nc_scroll_window in the
1066 * vertical-movement optimization code,
1068 if (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE
1069 || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) {
1070 TransformLine(NCURSES_SP_ARGx i);
1074 /* mark line changed successfully */
1075 if (i <= NewScreen(SP_PARM)->_maxy) {
1076 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1078 if (i <= CurScreen(SP_PARM)->_maxy) {
1079 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1084 /* put everything back in sync */
1085 for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) {
1086 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1088 for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) {
1089 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1092 if (!NewScreen(SP_PARM)->_leaveok) {
1093 CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx;
1094 CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury;
1096 GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx);
1101 * We would like to keep the physical screen in normal mode in case we get
1102 * other processes writing to the screen. This goal cannot be met for
1103 * magic cookies since it interferes with attributes that may propagate
1104 * past the current position.
1107 if (magic_cookie_glitch != 0)
1109 UpdateAttrs(SP_PARM, normal);
1111 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
1112 WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM));
1115 (void) times(&after);
1117 ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time",
1119 (long) (after.tms_stime - before.tms_stime),
1120 (long) (after.tms_utime - before.tms_utime)));
1121 #endif /* USE_TRACE_TIMES */
1123 _nc_signal_handler(TRUE);
1125 _nc_unlock_global(update);
1129 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
1133 return TINFO_DOUPDATE(CURRENT_SCREEN);
1140 * Returns the attributed character that corresponds to the "cleared"
1141 * screen. If the terminal has the back-color-erase feature, this will be
1142 * colored according to the wbkgd() call.
1144 * We treat 'curscr' specially because it isn't supposed to be set directly
1145 * in the wbkgd() call. Assume 'stdscr' for this case.
1147 #define BCE_ATTRS (A_NORMAL|A_COLOR)
1148 #define BCE_BKGD(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd)
1150 static NCURSES_INLINE NCURSES_CH_T
1151 ClrBlank(NCURSES_SP_DCLx WINDOW *win)
1153 NCURSES_CH_T blank = blankchar;
1154 if (back_color_erase)
1155 AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
1162 ** Update by clearing and redrawing the entire screen.
1167 ClrUpdate(NCURSES_SP_DCL0)
1169 TR(TRACE_UPDATE, (T_CALLED("ClrUpdate")));
1172 NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1173 int nonempty = min(screen_lines(SP_PARM),
1174 NewScreen(SP_PARM)->_maxy + 1);
1176 ClearScreen(NCURSES_SP_ARGx blank);
1178 TR(TRACE_UPDATE, ("updating screen from scratch"));
1180 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1182 for (i = 0; i < nonempty; i++)
1183 TransformLine(NCURSES_SP_ARGx i);
1185 TR(TRACE_UPDATE, (T_RETURN("")));
1191 ** Clear to end of current line, starting at the cursor position
1195 ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear)
1197 if (CurScreen(SP_PARM) != 0
1198 && SP_PARM->_cursrow >= 0) {
1201 for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) {
1204 &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]);
1206 if (!CharEq(*cp, blank)) {
1215 UpdateAttrs(SP_PARM, blank);
1216 if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) {
1217 NCURSES_PUTP2("clr_eol", clr_eol);
1219 int count = (screen_columns(SP_PARM) - SP_PARM->_curscol);
1221 PutChar(NCURSES_SP_ARGx CHREF(blank));
1229 ** Clear to end of screen, starting at the cursor position
1233 ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank)
1237 row = SP_PARM->_cursrow;
1238 col = SP_PARM->_curscol;
1245 UpdateAttrs(SP_PARM, blank);
1246 TPUTS_TRACE("clr_eos");
1247 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1249 screen_lines(SP_PARM) - row,
1250 NCURSES_SP_NAME(_nc_outch));
1252 while (col < screen_columns(SP_PARM))
1253 CurScreen(SP_PARM)->_line[row].text[col++] = blank;
1255 for (row++; row < screen_lines(SP_PARM); row++) {
1256 for (col = 0; col < screen_columns(SP_PARM); col++)
1257 CurScreen(SP_PARM)->_line[row].text[col] = blank;
1264 * Test if clearing the end of the screen would satisfy part of the
1265 * screen-update. Do this by scanning backwards through the lines in the
1266 * screen, checking if each is blank, and one or more are changed.
1269 ClrBottom(NCURSES_SP_DCLx int total)
1272 int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1);
1273 NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1];
1275 if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1278 for (row = total - 1; row >= 0; row--) {
1282 for (col = 0, ok = TRUE; ok && col < last; col++) {
1283 ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank));
1288 for (col = 0; ok && col < last; col++) {
1289 ok = (CharEq(CurScreen(SP_PARM)->_line[row].text[col], blank));
1295 /* don't use clr_eos for just one line if clr_eol available */
1297 GoTo(NCURSES_SP_ARGx top, 0);
1298 ClrToEOS(NCURSES_SP_ARGx blank);
1299 if (SP_PARM->oldhash && SP_PARM->newhash) {
1300 for (row = top; row < screen_lines(SP_PARM); row++)
1301 SP_PARM->oldhash[row] = SP_PARM->newhash[row];
1309 #if USE_WIDEC_SUPPORT
1310 #define check_xmc_transition(sp, a, b) \
1311 ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0)
1312 #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b))
1314 #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0)
1317 #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c]
1318 #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a)
1319 #endif /* USE_XMC_SUPPORT */
1322 ** TransformLine(lineno)
1324 ** Transform the given line in curscr to the one in newscr, using
1325 ** Insert/Delete Character if idcok && has_ic().
1327 ** firstChar = position of first different character in line
1328 ** oLastChar = position of last different character in old line
1329 ** nLastChar = position of last different character in new line
1331 ** move to firstChar
1332 ** overwrite chars up to min(oLastChar, nLastChar)
1333 ** if oLastChar < nLastChar
1334 ** insert newLine[oLastChar+1..nLastChar]
1336 ** delete oLastChar - nLastChar spaces
1340 TransformLine(NCURSES_SP_DCLx int const lineno)
1342 int firstChar, oLastChar, nLastChar;
1343 NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text;
1344 NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text;
1346 bool attrchanged = FALSE;
1348 TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno));
1350 /* copy new hash value to old one */
1351 if (SP_PARM->oldhash && SP_PARM->newhash)
1352 SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno];
1355 * If we have colors, there is the possibility of having two color pairs
1356 * that display as the same colors. For instance, Lynx does this. Check
1357 * for this case, and update the old line with the new line's colors when
1358 * they are equivalent.
1360 if (SP_PARM->_coloron) {
1364 for (n = 0; n < screen_columns(SP_PARM); n++) {
1365 if (!CharEq(newLine[n], oldLine[n])) {
1366 oldPair = GetPair(oldLine[n]);
1367 newPair = GetPair(newLine[n]);
1368 if (oldPair != newPair
1369 && unColor(oldLine[n]) == unColor(newLine[n])) {
1370 if (oldPair < SP_PARM->_pair_limit
1371 && newPair < SP_PARM->_pair_limit
1372 && (isSamePair(SP_PARM->_color_pairs[oldPair],
1373 SP_PARM->_color_pairs[newPair]))) {
1374 SetPair(oldLine[n], GetPair(newLine[n]));
1381 if (ceol_standout_glitch && clr_eol) {
1383 while (firstChar < screen_columns(SP_PARM)) {
1384 if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) {
1394 if (attrchanged) { /* we may have to disregard the whole line */
1395 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1396 ClrToEOL(NCURSES_SP_ARGx
1397 ClrBlank(NCURSES_SP_ARGx
1398 CurScreen(SP_PARM)), FALSE);
1399 PutRange(NCURSES_SP_ARGx
1400 oldLine, newLine, lineno, 0,
1401 screen_columns(SP_PARM) - 1);
1405 * This is a very simple loop to paint characters which may have the
1406 * magic cookie glitch embedded. It doesn't know much about video
1407 * attributes which are continued from one line to the next. It
1408 * assumes that we have filtered out requests for attribute changes
1409 * that do not get mapped to blank positions.
1411 * FIXME: we are not keeping track of where we put the cookies, so this
1412 * will work properly only once, since we may overwrite a cookie in a
1413 * following operation.
1415 } else if (magic_cookie_glitch > 0) {
1416 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1417 for (n = 0; n < screen_columns(SP_PARM); n++) {
1418 int m = n + magic_cookie_glitch;
1420 /* check for turn-on:
1421 * If we are writing an attributed blank, where the
1422 * previous cell is not attributed.
1424 if (ISBLANK(newLine[n])
1426 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n]))
1429 && xmc_turn_on(SP_PARM,
1430 xmc_new(SP_PARM, lineno - 1,
1431 screen_columns(SP_PARM) - 1),
1436 PutChar(NCURSES_SP_ARGx CHREF(newLine[n]));
1438 /* check for turn-off:
1439 * If we are writing an attributed non-blank, where the
1440 * next cell is blank, and not attributed.
1442 if (!ISBLANK(newLine[n])
1443 && ((n + 1 < screen_columns(SP_PARM)
1444 && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1]))
1445 || (n + 1 >= screen_columns(SP_PARM)
1446 && lineno + 1 < screen_lines(SP_PARM)
1447 && xmc_turn_off(SP_PARM,
1449 xmc_new(SP_PARM, lineno + 1, 0))))) {
1458 /* it may be cheap to clear leading whitespace with clr_bol */
1460 if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1461 int oFirstChar, nFirstChar;
1463 for (oFirstChar = 0;
1464 oFirstChar < screen_columns(SP_PARM);
1466 if (!CharEq(oldLine[oFirstChar], blank))
1468 for (nFirstChar = 0;
1469 nFirstChar < screen_columns(SP_PARM);
1471 if (!CharEq(newLine[nFirstChar], blank))
1474 if (nFirstChar == oFirstChar) {
1475 firstChar = nFirstChar;
1476 /* find the first differing character */
1477 while (firstChar < screen_columns(SP_PARM)
1478 && CharEq(newLine[firstChar], oldLine[firstChar]))
1480 } else if (oFirstChar > nFirstChar) {
1481 firstChar = nFirstChar;
1482 } else { /* oFirstChar < nFirstChar */
1483 firstChar = oFirstChar;
1484 if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) {
1485 if (nFirstChar >= screen_columns(SP_PARM)
1486 && SP_PARM->_el_cost <= SP_PARM->_el1_cost) {
1487 GoTo(NCURSES_SP_ARGx lineno, 0);
1488 UpdateAttrs(SP_PARM, blank);
1489 NCURSES_PUTP2("clr_eol", clr_eol);
1491 GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1);
1492 UpdateAttrs(SP_PARM, blank);
1493 NCURSES_PUTP2("clr_bol", clr_bol);
1496 while (firstChar < nFirstChar)
1497 oldLine[firstChar++] = blank;
1501 /* find the first differing character */
1502 while (firstChar < screen_columns(SP_PARM)
1503 && CharEq(newLine[firstChar], oldLine[firstChar]))
1506 /* if there wasn't one, we're done */
1507 if (firstChar >= screen_columns(SP_PARM)) {
1508 TR(TRACE_UPDATE, (T_RETURN("")));
1512 blank = newLine[screen_columns(SP_PARM) - 1];
1514 if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1515 /* find the last differing character */
1516 nLastChar = screen_columns(SP_PARM) - 1;
1518 while (nLastChar > firstChar
1519 && CharEq(newLine[nLastChar], oldLine[nLastChar]))
1522 if (nLastChar >= firstChar) {
1523 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1524 PutRange(NCURSES_SP_ARGx
1530 memcpy(oldLine + firstChar,
1531 newLine + firstChar,
1532 (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T));
1534 TR(TRACE_UPDATE, (T_RETURN("")));
1538 /* find last non-blank character on old line */
1539 oLastChar = screen_columns(SP_PARM) - 1;
1540 while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank))
1543 /* find last non-blank character on new line */
1544 nLastChar = screen_columns(SP_PARM) - 1;
1545 while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank))
1548 if ((nLastChar == firstChar)
1549 && (SP_PARM->_el_cost < (oLastChar - nLastChar))) {
1550 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1551 if (!CharEq(newLine[firstChar], blank))
1552 PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar]));
1553 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1554 } else if ((nLastChar != oLastChar)
1555 && (!CharEq(newLine[nLastChar], oldLine[oLastChar])
1556 || !(SP_PARM->_nc_sp_idcok
1557 && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) {
1558 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1559 if ((oLastChar - nLastChar) > SP_PARM->_el_cost) {
1560 if (PutRange(NCURSES_SP_ARGx
1566 GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1);
1568 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1570 n = max(nLastChar, oLastChar);
1571 PutRange(NCURSES_SP_ARGx
1579 int nLastNonblank = nLastChar;
1580 int oLastNonblank = oLastChar;
1582 /* find the last characters that really differ */
1583 /* can be -1 if no characters differ */
1584 while (CharEq(newLine[nLastChar], oldLine[oLastChar])) {
1585 /* don't split a wide char */
1586 if (isWidecExt(newLine[nLastChar]) &&
1587 !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1]))
1591 if (nLastChar == -1 || oLastChar == -1)
1595 n = min(oLastChar, nLastChar);
1596 if (n >= firstChar) {
1597 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1598 PutRange(NCURSES_SP_ARGx
1606 if (oLastChar < nLastChar) {
1607 int m = max(nLastNonblank, oLastNonblank);
1608 #if USE_WIDEC_SUPPORT
1610 while (isWidecExt(newLine[n + 1]) && n) {
1612 --oLastChar; /* increase cost */
1614 } else if (n >= firstChar &&
1615 isWidecBase(newLine[n])) {
1616 while (isWidecExt(newLine[n + 1])) {
1618 ++oLastChar; /* decrease cost */
1622 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1623 if ((nLastChar < nLastNonblank)
1624 || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) {
1625 PutRange(NCURSES_SP_ARGx
1632 InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar);
1634 } else if (oLastChar > nLastChar) {
1635 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1636 if (DelCharCost(SP_PARM, oLastChar - nLastChar)
1637 > SP_PARM->_el_cost + nLastNonblank - (n + 1)) {
1638 if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno,
1639 n + 1, nLastNonblank)) {
1640 GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1);
1642 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1645 * The delete-char sequence will
1646 * effectively shift in blanks from the
1647 * right margin of the screen. Ensure
1648 * that they are the right color by
1649 * setting the video attributes from
1650 * the last character on the row.
1652 UpdateAttrs(SP_PARM, blank);
1653 DelChar(NCURSES_SP_ARGx oLastChar - nLastChar);
1659 /* update the code's internal representation */
1660 if (screen_columns(SP_PARM) > firstChar)
1661 memcpy(oldLine + firstChar,
1662 newLine + firstChar,
1663 (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T));
1664 TR(TRACE_UPDATE, (T_RETURN("")));
1669 ** ClearScreen(blank)
1671 ** Clear the physical screen and put cursor at home
1676 ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank)
1679 bool fast_clear = (clear_screen || clr_eos || clr_eol);
1681 TR(TRACE_UPDATE, ("ClearScreen() called"));
1683 #if NCURSES_EXT_FUNCS
1684 if (SP_PARM->_coloron
1685 && !SP_PARM->_default_color) {
1686 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
1687 (short) GET_SCREEN_PAIR(SP_PARM),
1690 NCURSES_SP_NAME(_nc_outch));
1691 if (!back_color_erase) {
1699 UpdateAttrs(SP_PARM, blank);
1700 NCURSES_PUTP2("clear_screen", clear_screen);
1701 SP_PARM->_cursrow = SP_PARM->_curscol = 0;
1702 position_check(NCURSES_SP_ARGx
1706 } else if (clr_eos) {
1707 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1708 GoTo(NCURSES_SP_ARGx 0, 0);
1709 UpdateAttrs(SP_PARM, blank);
1710 TPUTS_TRACE("clr_eos");
1711 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1713 screen_lines(SP_PARM),
1714 NCURSES_SP_NAME(_nc_outch));
1715 } else if (clr_eol) {
1716 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1717 UpdateAttrs(SP_PARM, blank);
1718 for (i = 0; i < screen_lines(SP_PARM); i++) {
1719 GoTo(NCURSES_SP_ARGx i, 0);
1720 NCURSES_PUTP2("clr_eol", clr_eol);
1722 GoTo(NCURSES_SP_ARGx 0, 0);
1725 UpdateAttrs(SP_PARM, blank);
1726 for (i = 0; i < screen_lines(SP_PARM); i++) {
1727 GoTo(NCURSES_SP_ARGx i, 0);
1728 for (j = 0; j < screen_columns(SP_PARM); j++)
1729 PutChar(NCURSES_SP_ARGx CHREF(blank));
1731 GoTo(NCURSES_SP_ARGx 0, 0);
1734 for (i = 0; i < screen_lines(SP_PARM); i++) {
1735 for (j = 0; j < screen_columns(SP_PARM); j++)
1736 CurScreen(SP_PARM)->_line[i].text[j] = blank;
1739 TR(TRACE_UPDATE, ("screen cleared"));
1743 ** InsStr(line, count)
1745 ** Insert the count characters pointed to by line.
1750 InsStr(NCURSES_SP_DCLx NCURSES_CH_T * line, int count)
1752 TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called",
1754 (void *) line, count));
1756 /* Prefer parm_ich as it has the smallest cost - no need to shift
1757 * the whole line on each character. */
1758 /* The order must match that of InsCharCost. */
1760 TPUTS_TRACE("parm_ich");
1761 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1762 TPARM_1(parm_ich, count),
1764 NCURSES_SP_NAME(_nc_outch));
1766 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1770 } else if (enter_insert_mode && exit_insert_mode) {
1771 NCURSES_PUTP2("enter_insert_mode", enter_insert_mode);
1773 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1774 if (insert_padding) {
1775 NCURSES_PUTP2("insert_padding", insert_padding);
1780 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
1783 NCURSES_PUTP2("insert_character", insert_character);
1784 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1785 if (insert_padding) {
1786 NCURSES_PUTP2("insert_padding", insert_padding);
1792 position_check(NCURSES_SP_ARGx
1794 SP_PARM->_curscol, "InsStr");
1800 ** Delete count characters at current position
1805 DelChar(NCURSES_SP_DCLx int count)
1807 TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)",
1808 (void *) SP_PARM, count,
1809 (long) NewScreen(SP_PARM)->_cury,
1810 (long) NewScreen(SP_PARM)->_curx));
1813 TPUTS_TRACE("parm_dch");
1814 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1815 TPARM_1(parm_dch, count),
1817 NCURSES_SP_NAME(_nc_outch));
1821 for (n = 0; n < count; n++) {
1822 NCURSES_PUTP2("delete_character", delete_character);
1828 * Physical-scrolling support
1830 * This code was adapted from Keith Bostic's hardware scrolling
1831 * support for 4.4BSD curses. I (esr) translated it to use terminfo
1832 * capabilities, narrowed the call interface slightly, and cleaned
1833 * up some convoluted tests. I also added support for the memory_above
1834 * memory_below, and non_dest_scroll_region capabilities.
1836 * For this code to work, we must have either
1837 * change_scroll_region and scroll forward/reverse commands, or
1838 * insert and delete line capabilities.
1839 * When the scrolling region has been set, the cursor has to
1840 * be at the last line of the region to make the scroll up
1841 * happen, or on the first line of region to scroll down.
1843 * This code makes one aesthetic decision in the opposite way from
1844 * BSD curses. BSD curses preferred pairs of il/dl operations
1845 * over scrolls, allegedly because il/dl looked faster. We, on
1846 * the other hand, prefer scrolls because (a) they're just as fast
1847 * on many terminals and (b) using them avoids bouncing an
1848 * unchanged bottom section of the screen up and down, which is
1851 * (lav): added more cases, used dl/il when bot==maxy and in csr case.
1853 * I used assumption that capabilities il/il1/dl/dl1 work inside
1854 * changed scroll region not shifting screen contents outside of it.
1855 * If there are any terminals behaving different way, it would be
1856 * necessary to add some conditions to scroll_csr_forward/backward.
1859 /* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */
1861 scroll_csr_forward(NCURSES_SP_DCLx
1871 if (n == 1 && scroll_forward && top == miny && bot == maxy) {
1872 GoTo(NCURSES_SP_ARGx bot, 0);
1873 UpdateAttrs(SP_PARM, blank);
1874 NCURSES_PUTP2("scroll_forward", scroll_forward);
1875 } else if (n == 1 && delete_line && bot == maxy) {
1876 GoTo(NCURSES_SP_ARGx top, 0);
1877 UpdateAttrs(SP_PARM, blank);
1878 NCURSES_PUTP2("delete_line", delete_line);
1879 } else if (parm_index && top == miny && bot == maxy) {
1880 GoTo(NCURSES_SP_ARGx bot, 0);
1881 UpdateAttrs(SP_PARM, blank);
1882 TPUTS_TRACE("parm_index");
1883 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1884 TPARM_2(parm_index, n, 0),
1886 NCURSES_SP_NAME(_nc_outch));
1887 } else if (parm_delete_line && bot == maxy) {
1888 GoTo(NCURSES_SP_ARGx top, 0);
1889 UpdateAttrs(SP_PARM, blank);
1890 TPUTS_TRACE("parm_delete_line");
1891 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1892 TPARM_2(parm_delete_line, n, 0),
1894 NCURSES_SP_NAME(_nc_outch));
1895 } else if (scroll_forward && top == miny && bot == maxy) {
1896 GoTo(NCURSES_SP_ARGx bot, 0);
1897 UpdateAttrs(SP_PARM, blank);
1898 for (i = 0; i < n; i++) {
1899 NCURSES_PUTP2("scroll_forward", scroll_forward);
1901 } else if (delete_line && bot == maxy) {
1902 GoTo(NCURSES_SP_ARGx top, 0);
1903 UpdateAttrs(SP_PARM, blank);
1904 for (i = 0; i < n; i++) {
1905 NCURSES_PUTP2("delete_line", delete_line);
1910 #if NCURSES_EXT_FUNCS
1911 if (FILL_BCE(SP_PARM)) {
1913 for (i = 0; i < n; i++) {
1914 GoTo(NCURSES_SP_ARGx bot - i, 0);
1915 for (j = 0; j < screen_columns(SP_PARM); j++)
1916 PutChar(NCURSES_SP_ARGx CHREF(blank));
1923 /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */
1926 scroll_csr_backward(NCURSES_SP_DCLx
1936 if (n == 1 && scroll_reverse && top == miny && bot == maxy) {
1937 GoTo(NCURSES_SP_ARGx top, 0);
1938 UpdateAttrs(SP_PARM, blank);
1939 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1940 } else if (n == 1 && insert_line && bot == maxy) {
1941 GoTo(NCURSES_SP_ARGx top, 0);
1942 UpdateAttrs(SP_PARM, blank);
1943 NCURSES_PUTP2("insert_line", insert_line);
1944 } else if (parm_rindex && top == miny && bot == maxy) {
1945 GoTo(NCURSES_SP_ARGx top, 0);
1946 UpdateAttrs(SP_PARM, blank);
1947 TPUTS_TRACE("parm_rindex");
1948 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1949 TPARM_2(parm_rindex, n, 0),
1951 NCURSES_SP_NAME(_nc_outch));
1952 } else if (parm_insert_line && bot == maxy) {
1953 GoTo(NCURSES_SP_ARGx top, 0);
1954 UpdateAttrs(SP_PARM, blank);
1955 TPUTS_TRACE("parm_insert_line");
1956 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1957 TPARM_2(parm_insert_line, n, 0),
1959 NCURSES_SP_NAME(_nc_outch));
1960 } else if (scroll_reverse && top == miny && bot == maxy) {
1961 GoTo(NCURSES_SP_ARGx top, 0);
1962 UpdateAttrs(SP_PARM, blank);
1963 for (i = 0; i < n; i++) {
1964 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1966 } else if (insert_line && bot == maxy) {
1967 GoTo(NCURSES_SP_ARGx top, 0);
1968 UpdateAttrs(SP_PARM, blank);
1969 for (i = 0; i < n; i++) {
1970 NCURSES_PUTP2("insert_line", insert_line);
1975 #if NCURSES_EXT_FUNCS
1976 if (FILL_BCE(SP_PARM)) {
1978 for (i = 0; i < n; i++) {
1979 GoTo(NCURSES_SP_ARGx top + i, 0);
1980 for (j = 0; j < screen_columns(SP_PARM); j++)
1981 PutChar(NCURSES_SP_ARGx CHREF(blank));
1988 /* scroll by using delete_line at del and insert_line at ins */
1991 scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank)
1995 if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line)))
1998 GoTo(NCURSES_SP_ARGx del, 0);
1999 UpdateAttrs(SP_PARM, blank);
2000 if (n == 1 && delete_line) {
2001 NCURSES_PUTP2("delete_line", delete_line);
2002 } else if (parm_delete_line) {
2003 TPUTS_TRACE("parm_delete_line");
2004 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
2005 TPARM_2(parm_delete_line, n, 0),
2007 NCURSES_SP_NAME(_nc_outch));
2008 } else { /* if (delete_line) */
2009 for (i = 0; i < n; i++) {
2010 NCURSES_PUTP2("delete_line", delete_line);
2014 GoTo(NCURSES_SP_ARGx ins, 0);
2015 UpdateAttrs(SP_PARM, blank);
2016 if (n == 1 && insert_line) {
2017 NCURSES_PUTP2("insert_line", insert_line);
2018 } else if (parm_insert_line) {
2019 TPUTS_TRACE("parm_insert_line");
2020 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
2021 TPARM_2(parm_insert_line, n, 0),
2023 NCURSES_SP_NAME(_nc_outch));
2024 } else { /* if (insert_line) */
2025 for (i = 0; i < n; i++) {
2026 NCURSES_PUTP2("insert_line", insert_line);
2034 * Note: some terminals require the cursor to be within the scrolling margins
2035 * before setting them. Generally, the cursor must be at the appropriate end
2036 * of the scrolling margins when issuing an indexing operation (it is not
2037 * apparent whether it must also be at the left margin; we do this just to be
2038 * safe). To make the related cursor movement a little faster, we use the
2039 * save/restore cursor capabilities if the terminal has them.
2042 NCURSES_SP_NAME(_nc_scrolln) (NCURSES_SP_DCLx
2047 /* scroll region from top to bot by n lines */
2051 bool cursor_saved = FALSE;
2054 TR(TRACE_MOVE, ("_nc_scrolln(%p, %d, %d, %d, %d)",
2055 (void *) SP_PARM, n, top, bot, maxy));
2057 if (!IsValidScreen(SP_PARM))
2060 blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
2064 * If we scroll, we might remove a cookie.
2066 if (magic_cookie_glitch > 0) {
2071 if (n > 0) { /* scroll up (forward) */
2073 * Explicitly clear if stuff pushed off top of region might
2074 * be saved by the terminal.
2076 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, 0, maxy, blank);
2078 if (res == ERR && change_scroll_region) {
2079 if ((((n == 1 && scroll_forward) || parm_index)
2080 && (SP_PARM->_cursrow == bot || SP_PARM->_cursrow == bot - 1))
2081 && save_cursor && restore_cursor) {
2082 cursor_saved = TRUE;
2083 NCURSES_PUTP2("save_cursor", save_cursor);
2085 NCURSES_PUTP2("change_scroll_region",
2086 TPARM_2(change_scroll_region, top, bot));
2088 NCURSES_PUTP2("restore_cursor", restore_cursor);
2090 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2093 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank);
2095 NCURSES_PUTP2("change_scroll_region",
2096 TPARM_2(change_scroll_region, 0, maxy));
2097 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2100 if (res == ERR && SP_PARM->_nc_sp_idlok)
2101 res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank);
2104 * Clear the newly shifted-in text.
2107 && (non_dest_scroll_region || (memory_below && bot == maxy))) {
2108 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2109 if (bot == maxy && clr_eos) {
2110 GoTo(NCURSES_SP_ARGx bot - n + 1, 0);
2111 ClrToEOS(NCURSES_SP_ARGx blank2);
2113 for (i = 0; i < n; i++) {
2114 GoTo(NCURSES_SP_ARGx bot - i, 0);
2115 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2120 } else { /* (n < 0) - scroll down (backward) */
2121 res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank);
2123 if (res == ERR && change_scroll_region) {
2125 && (SP_PARM->_cursrow == top ||
2126 SP_PARM->_cursrow == top - 1)
2127 && save_cursor && restore_cursor) {
2128 cursor_saved = TRUE;
2129 NCURSES_PUTP2("save_cursor", save_cursor);
2131 NCURSES_PUTP2("change_scroll_region",
2132 TPARM_2(change_scroll_region, top, bot));
2134 NCURSES_PUTP2("restore_cursor", restore_cursor);
2136 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2139 res = scroll_csr_backward(NCURSES_SP_ARGx
2140 -n, top, bot, top, bot, blank);
2142 NCURSES_PUTP2("change_scroll_region",
2143 TPARM_2(change_scroll_region, 0, maxy));
2144 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2147 if (res == ERR && SP_PARM->_nc_sp_idlok)
2148 res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank);
2151 * Clear the newly shifted-in text.
2154 && (non_dest_scroll_region || (memory_above && top == 0))) {
2155 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2156 for (i = 0; i < -n; i++) {
2157 GoTo(NCURSES_SP_ARGx i + top, 0);
2158 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2166 _nc_scroll_window(CurScreen(SP_PARM), n,
2167 (NCURSES_SIZE_T) top,
2168 (NCURSES_SIZE_T) bot,
2171 /* shift hash values too - they can be reused */
2172 NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot);
2177 #if NCURSES_SP_FUNCS
2179 _nc_scrolln(int n, int top, int bot, int maxy)
2181 return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy);
2185 NCURSES_EXPORT(void)
2186 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0)
2190 /* make sure terminal is in a sane known state */
2191 SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL);
2192 NewScreen(SP_PARM)->_clear = TRUE;
2194 /* reset color pairs and definitions */
2195 if (SP_PARM->_coloron || SP_PARM->_color_defs)
2196 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2198 /* restore user-defined colors, if any */
2199 if (SP_PARM->_color_defs < 0 && !SP_PARM->_direct_color.value) {
2201 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
2202 for (n = 0; n < SP_PARM->_color_defs; ++n) {
2203 if (SP_PARM->_color_table[n].init) {
2204 _nc_init_color(SP_PARM,
2206 SP_PARM->_color_table[n].r,
2207 SP_PARM->_color_table[n].g,
2208 SP_PARM->_color_table[n].b);
2213 if (exit_attribute_mode)
2214 NCURSES_PUTP2("exit_attribute_mode", exit_attribute_mode);
2216 /* turn off attributes */
2217 if (exit_alt_charset_mode)
2218 NCURSES_PUTP2("exit_alt_charset_mode", exit_alt_charset_mode);
2219 if (exit_standout_mode)
2220 NCURSES_PUTP2("exit_standout_mode", exit_standout_mode);
2221 if (exit_underline_mode)
2222 NCURSES_PUTP2("exit_underline_mode", exit_underline_mode);
2224 if (exit_insert_mode)
2225 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
2226 if (enter_am_mode && exit_am_mode) {
2227 if (auto_right_margin) {
2228 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
2230 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
2235 #if NCURSES_SP_FUNCS
2236 NCURSES_EXPORT(void)
2237 _nc_screen_resume(void)
2239 NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN);
2243 NCURSES_EXPORT(void)
2244 NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0)
2246 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
2249 #if NCURSES_SP_FUNCS
2250 NCURSES_EXPORT(void)
2251 _nc_screen_init(void)
2253 NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN);
2257 /* wrap up screen handling */
2258 NCURSES_EXPORT(void)
2259 NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0)
2263 UpdateAttrs(SP_PARM, normal);
2264 #if NCURSES_EXT_FUNCS
2265 if (SP_PARM->_coloron
2266 && !SP_PARM->_default_color) {
2267 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
2268 SP_PARM->_default_color = TRUE;
2269 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
2273 NCURSES_SP_NAME(_nc_outch));
2274 SP_PARM->_default_color = FALSE;
2276 TINFO_MVCUR(NCURSES_SP_ARGx
2279 screen_lines(SP_PARM) - 1,
2282 ClrToEOL(NCURSES_SP_ARGx blank, TRUE);
2285 if (SP_PARM->_color_defs) {
2286 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2291 #if NCURSES_SP_FUNCS
2292 NCURSES_EXPORT(void)
2293 _nc_screen_wrap(void)
2295 NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN);
2300 NCURSES_EXPORT(void)
2301 NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous)
2304 attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM)));
2308 SP_PARM->_curscol += magic_cookie_glitch;
2309 if (SP_PARM->_curscol >= SP_PARM->_columns)
2310 wrap_cursor(NCURSES_SP_ARG);
2311 TR(TRACE_UPDATE, ("bumped to %d,%d after cookie",
2312 SP_PARM->_cursrow, SP_PARM->_curscol));
2319 #if NCURSES_SP_FUNCS
2320 NCURSES_EXPORT(void)
2321 _nc_do_xmc_glitch(attr_t previous)
2323 NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous);
2327 #endif /* USE_XMC_SUPPORT */