1 /****************************************************************************
2 * Copyright (c) 1998-2017,2018 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 1.298 2018/05/05 19:11:55 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))
348 my_ch = CHDEREF(ch); /* work around const param */
350 #if USE_WIDEC_SUPPORT
352 * This is crude & ugly, but works most of the time. It checks if the
353 * acs_chars string specified that we have a mapping for this
354 * character, and uses the wide-character mapping when we expect the
355 * normal one to be broken (by mis-design ;-).
357 if (SP_PARM->_screen_unicode
358 && _nc_wacs[CharOf(my_ch)].chars[0]) {
359 if (SP_PARM->_screen_acs_map[CharOf(my_ch)]) {
360 if (SP_PARM->_screen_acs_fix) {
361 RemAttr(attr, A_ALTCHARSET);
362 my_ch = _nc_wacs[CharOf(my_ch)];
365 RemAttr(attr, A_ALTCHARSET);
366 my_ch = _nc_wacs[CharOf(my_ch)];
368 #if !NCURSES_WCWIDTH_GRAPHICS
369 if (!(AttrOf(attr) & A_ALTCHARSET)) {
372 #endif /* !NCURSES_WCWIDTH_GRAPHICS */
375 if (!SP_PARM->_screen_acs_map[c8]) {
376 chtype temp = UChar(SP_PARM->_acs_map[c8]);
377 RemAttr(attr, A_ALTCHARSET);
378 SetChar(my_ch, temp, AttrOf(attr));
382 * If we (still) have alternate character set, it is the normal 8bit
383 * flavor. The _screen_acs_map[] array tells if the character was
384 * really in acs_chars, needed because of the way wide/normal line
385 * drawing flavors are integrated.
387 if (AttrOf(attr) & A_ALTCHARSET) {
389 chtype temp = UChar(SP_PARM->_acs_map[j]);
392 SetChar(my_ch, temp, AttrOf(attr));
395 RemAttr(attr, A_ALTCHARSET);
400 #if USE_WIDEC_SUPPORT && !NCURSES_WCWIDTH_GRAPHICS
401 else if (chlen > 1 && is_wacs_value(CharOfD(ch))) {
405 if (tilde_glitch && (CharOfD(ch) == L('~'))) {
406 SetChar(tilde, L('`'), AttrOf(attr));
410 UpdateAttrs(SP_PARM, attr);
412 #if !USE_WIDEC_SUPPORT
415 SP_PARM->_curscol += chlen;
417 NCURSES_PUTP2("char_padding", char_padding);
422 check_pending(NCURSES_SP_DCL0)
423 /* check for pending input */
425 bool have_pending = FALSE;
428 * Only carry out this check when the flag is zero, otherwise we'll
429 * have the refreshing slow down drastically (or stop) if there's an
430 * unread character available.
432 if (SP_PARM->_fifohold != 0)
435 if (SP_PARM->_checkfd >= 0) {
437 struct pollfd fds[1];
438 fds[0].fd = SP_PARM->_checkfd;
439 fds[0].events = POLLIN;
440 if (poll(fds, (size_t) 1, 0) > 0) {
443 #elif defined(__BEOS__)
445 * BeOS's select() is declared in socket.h, so the configure script does
446 * not see it. That's just as well, since that function works only for
447 * sockets. This (using snooze and ioctl) was distilled from Be's patch
448 * for ncurses which uses a separate thread to simulate select().
450 * FIXME: the return values from the ioctl aren't very clear if we get
454 int howmany = ioctl(0, 'ichr', &n);
455 if (howmany >= 0 && n > 0) {
460 struct timeval ktimeout;
463 ktimeout.tv_usec = 0;
466 FD_SET(SP_PARM->_checkfd, &fdset);
467 if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) {
473 SP_PARM->_fifohold = 5;
474 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
479 /* put char at lower right corner */
481 PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch)
483 if (!auto_right_margin) {
484 /* we can put the char directly */
485 PutAttrChar(NCURSES_SP_ARGx ch);
486 } else if (enter_am_mode && exit_am_mode) {
487 /* we can suppress automargin */
488 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
490 PutAttrChar(NCURSES_SP_ARGx ch);
492 position_check(NCURSES_SP_ARGx
497 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
498 } else if ((enter_insert_mode && exit_insert_mode)
499 || insert_character || parm_ich) {
501 screen_lines(SP_PARM) - 1,
502 screen_columns(SP_PARM) - 2);
503 PutAttrChar(NCURSES_SP_ARGx ch);
505 screen_lines(SP_PARM) - 1,
506 screen_columns(SP_PARM) - 2);
507 InsStr(NCURSES_SP_ARGx
508 NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text +
509 screen_columns(SP_PARM) - 2, 1);
514 * Wrap the cursor position, i.e., advance to the beginning of the next line.
517 wrap_cursor(NCURSES_SP_DCL0)
519 if (eat_newline_glitch) {
521 * xenl can manifest two different ways. The vt100 way is that, when
522 * you'd expect the cursor to wrap, it stays hung at the right margin
523 * (on top of the character just emitted) and doesn't wrap until the
524 * *next* graphic char is emitted. The c100 way is to ignore LF
525 * received just after an am wrap.
527 * An aggressive way to handle this would be to emit CR/LF after the
528 * char and then assume the wrap is done, you're on the first position
529 * of the next line, and the terminal out of its weird state. Here
530 * it's safe to just tell the code that the cursor is in hyperspace and
531 * let the next mvcur() call straighten things out.
533 SP_PARM->_curscol = -1;
534 SP_PARM->_cursrow = -1;
535 } else if (auto_right_margin) {
536 SP_PARM->_curscol = 0;
539 * We've actually moved - but may have to work around problems with
540 * video attributes not working.
542 if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) {
543 TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping",
544 (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)),
545 _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM)))));
546 (void) VIDATTR(SP_PARM, A_NORMAL, 0);
551 position_check(NCURSES_SP_ARGx
557 static NCURSES_INLINE void
558 PutChar(NCURSES_SP_DCLx const ARG_CH_T ch)
559 /* insert character, handling automargin stuff */
561 if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 &&
562 SP_PARM->_curscol == screen_columns(SP_PARM) - 1) {
563 PutCharLR(NCURSES_SP_ARGx ch);
565 PutAttrChar(NCURSES_SP_ARGx ch);
568 if (SP_PARM->_curscol >= screen_columns(SP_PARM))
569 wrap_cursor(NCURSES_SP_ARG);
571 position_check(NCURSES_SP_ARGx
573 SP_PARM->_curscol, "PutChar");
577 * Check whether the given character can be output by clearing commands. This
578 * includes test for being a space and not including any 'bad' attributes, such
579 * as A_REVERSE. All attribute flags which don't affect appearance of a space
580 * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded.
582 static NCURSES_INLINE bool
583 can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch)
585 if (!back_color_erase && SP_PARM->_coloron) {
586 #if NCURSES_EXT_FUNCS
589 if (!SP_PARM->_default_color)
591 if (!(isDefaultColor(SP_PARM->_default_fg) &&
592 isDefaultColor(SP_PARM->_default_bg)))
594 if ((pair = GetPair(CHDEREF(ch))) != 0) {
595 NCURSES_COLOR_T fg, bg;
596 if (NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx
599 || !(isDefaultColor(fg) && isDefaultColor(bg))) {
604 if (AttrOfD(ch) & A_COLOR)
608 return (ISBLANK(CHDEREF(ch)) &&
609 (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR);
613 * Issue a given span of characters from an array.
614 * Must be functionally equivalent to:
615 * for (i = 0; i < num; i++)
617 * but can leave the cursor positioned at the middle of the interval.
619 * Returns: 0 - cursor is at the end of interval
620 * 1 - cursor is somewhere in the middle
622 * This code is optimized using ech and rep.
625 EmitRange(NCURSES_SP_DCLx const NCURSES_CH_T * ntext, int num)
629 TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num)));
631 if (erase_chars || repeat_char) {
636 while (num > 1 && !CharEq(ntext[0], ntext[1])) {
637 PutChar(NCURSES_SP_ARGx CHREF(ntext[0]));
643 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
648 while (runcount < num && CharEq(ntext[runcount], ntext0))
652 * The cost expression in the middle isn't exactly right.
653 * _cup_ch_cost is an upper bound on the cost for moving to the
654 * end of the erased area, but not the cost itself (which we
655 * can't compute without emitting the move). This may result
656 * in erase_chars not getting used in some situations for
657 * which it would be marginally advantageous.
660 && runcount > SP_PARM->_ech_cost + SP_PARM->_cup_ch_cost
661 && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) {
662 UpdateAttrs(SP_PARM, ntext0);
663 NCURSES_PUTP2("erase_chars", TPARM_1(erase_chars, runcount));
666 * If this is the last part of the given interval,
667 * don't bother moving cursor, since it can be the
668 * last update on the line.
670 if (runcount < num) {
673 SP_PARM->_curscol + runcount);
675 return 1; /* cursor stays in the middle */
677 } else if (repeat_char != 0 &&
678 #if USE_WIDEC_SUPPORT
679 (!SP_PARM->_screen_unicode &&
680 ((AttrOf(ntext0) & A_ALTCHARSET) == 0 ||
681 (CharOf(ntext0) < ACS_LEN))) &&
683 runcount > SP_PARM->_rep_cost) {
685 bool wrap_possible = (SP_PARM->_curscol + runcount >=
686 screen_columns(SP_PARM));
687 int rep_count = runcount;
692 UpdateAttrs(SP_PARM, ntext0);
694 if ((AttrOf(temp) & A_ALTCHARSET) &&
695 SP_PARM->_acs_map != 0 &&
696 (SP_PARM->_acs_map[CharOf(temp)] & A_CHARTEXT) != 0) {
698 (SP_PARM->_acs_map[CharOf(ntext0)] & A_CHARTEXT),
699 AttrOf(ntext0) | A_ALTCHARSET);
701 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
706 NCURSES_SP_NAME(_nc_outch));
707 SP_PARM->_curscol += rep_count;
710 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
712 for (i = 0; i < runcount; i++)
713 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
721 for (i = 0; i < num; i++)
722 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
727 * Output the line in the given range [first .. last]
729 * If there's a run of identical characters that's long enough to justify
730 * cursor movement, use that also.
732 * Returns: same as EmitRange
735 PutRange(NCURSES_SP_DCLx
736 const NCURSES_CH_T * otext,
737 const NCURSES_CH_T * ntext,
743 TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)",
745 (const void *) otext,
746 (const void *) ntext,
750 && (last - first + 1) > SP_PARM->_inline_cost) {
753 for (j = first, same = 0; j <= last; j++) {
754 if (!same && isWidecExt(otext[j]))
756 if (CharEq(otext[j], ntext[j])) {
759 if (same > SP_PARM->_inline_cost) {
760 EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
761 GoTo(NCURSES_SP_ARGx row, first = j);
766 i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
768 * Always return 1 for the next GoTo() after a PutRange() if we found
769 * identical characters at end of interval
771 rc = (same == 0 ? i : 1);
773 rc = EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1);
778 /* leave unbracketed here so 'indent' works */
779 #define MARK_NOCHANGE(win,row) \
780 win->_line[row].firstchar = _NOCHANGE; \
781 win->_line[row].lastchar = _NOCHANGE; \
782 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row)
785 TINFO_DOUPDATE(NCURSES_SP_DCL0)
790 struct tms before, after;
791 #endif /* USE_TRACE_TIMES */
793 T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM));
795 _nc_lock_global(update);
798 _nc_unlock_global(update);
803 * It is "legal" but unlikely that an application could assign a new
804 * value to one of the standard windows. Check for that possibility
805 * and try to recover.
807 * We do not allow applications to assign new values in the reentrant
810 #define SyncScreens(internal,exported) \
811 if (internal == 0) internal = exported; \
812 if (internal != exported) exported = internal
814 SyncScreens(CurScreen(SP_PARM), curscr);
815 SyncScreens(NewScreen(SP_PARM), newscr);
816 SyncScreens(StdScreen(SP_PARM), stdscr);
819 if (CurScreen(SP_PARM) == 0
820 || NewScreen(SP_PARM) == 0
821 || StdScreen(SP_PARM) == 0) {
822 _nc_unlock_global(update);
826 if (USE_TRACEF(TRACE_UPDATE)) {
827 if (CurScreen(SP_PARM)->_clear)
828 _tracef("curscr is clear");
830 _tracedump("curscr", CurScreen(SP_PARM));
831 _tracedump("newscr", NewScreen(SP_PARM));
832 _nc_unlock_global(tracef);
836 _nc_signal_handler(FALSE);
838 if (SP_PARM->_fifohold)
839 SP_PARM->_fifohold--;
842 if ((SP_PARM->_endwin == ewSuspend)
843 || _nc_handle_sigwinch(SP_PARM)) {
845 * This is a transparent extension: XSI does not address it,
846 * and applications need not know that ncurses can do it.
848 * Check if the terminal size has changed while curses was off
849 * (this can happen in an xterm, for example), and resize the
850 * ncurses data structures accordingly.
852 _nc_update_screensize(SP_PARM);
856 if (SP_PARM->_endwin == ewSuspend) {
858 T(("coming back from shell mode"));
859 NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG);
861 NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG);
862 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
863 SP_PARM->_mouse_resume(SP_PARM);
865 SP_PARM->_endwin = ewRunning;
868 /* zero the metering machinery */
870 (void) times(&before);
871 #endif /* USE_TRACE_TIMES */
874 * This is the support for magic-cookie terminals. The theory: we scan
875 * the virtual screen looking for attribute turnons. Where we find one,
876 * check to make sure it's realizable by seeing if the required number of
877 * un-attributed blanks are present before and after the attributed range;
878 * try to shift the range boundaries over blanks (not changing the screen
879 * display) so this becomes true. If it is, shift the beginning attribute
880 * change appropriately (the end one, if we've gotten this far, is
881 * guaranteed room for its cookie). If not, nuke the added attributes out
885 if (magic_cookie_glitch > 0) {
887 attr_t rattr = A_NORMAL;
889 for (i = 0; i < screen_lines(SP_PARM); i++) {
890 for (j = 0; j < screen_columns(SP_PARM); j++) {
892 NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text;
893 attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers;
894 attr_t turnon = thisattr & ~rattr;
896 /* is an attribute turned on here? */
902 TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr)));
903 TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon)));
906 * If the attribute change location is a blank with a "safe"
907 * attribute, undo the attribute turnon. This may ensure
908 * there's enough room to set the attribute before the first
909 * non-blank in the run.
911 #define SAFE(scr,a) (!((a) & (scr)->_xmc_triggers))
912 if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) {
913 RemAttr(thisline[j], turnon);
917 /* check that there's enough room at start of span */
918 for (k = 1; k <= magic_cookie_glitch; k++) {
920 || !ISBLANK(thisline[j - k])
921 || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) {
923 TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s",
925 (ISBLANK(thisline[j - k])
928 (SAFE(SP_PARM, AttrOf(thisline[j - k]))
935 bool end_onscreen = FALSE;
938 /* find end of span, if it's onscreen */
939 for (m = i; m < screen_lines(SP_PARM); m++) {
940 for (; n < screen_columns(SP_PARM); n++) {
942 AttrOf(NewScreen(SP_PARM)->_line[m].text[n]);
943 if ((testattr & SP_PARM->_xmc_triggers) == rattr) {
946 ("Range attributed with %s ends at (%d, %d)",
947 _traceattr(turnon), m, n));
954 ("Range attributed with %s ends offscreen",
955 _traceattr(turnon)));
959 NCURSES_CH_T *lastline =
960 NewScreen(SP_PARM)->_line[m].text;
963 * If there are safely-attributed blanks at the end of
964 * the range, shorten the range. This will help ensure
965 * that there is enough room at end of span.
968 && ISBLANK(lastline[n])
969 && SAFE(SP_PARM, AttrOf(lastline[n]))) {
970 RemAttr(lastline[n--], turnon);
973 /* check that there's enough room at end of span */
974 for (k = 1; k <= magic_cookie_glitch; k++) {
975 if (n + k >= screen_columns(SP_PARM)
976 || !ISBLANK(lastline[n + k])
977 || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) {
980 ("No room at end in %d,%d%s%s",
982 (ISBLANK(lastline[n + k])
985 (SAFE(SP_PARM, AttrOf(lastline[n + k]))
998 ("Clearing %s beginning at (%d, %d)",
999 _traceattr(turnon), i, j));
1001 /* turn off new attributes over span */
1002 for (p = i; p < screen_lines(SP_PARM); p++) {
1003 for (; q < screen_columns(SP_PARM); q++) {
1004 attr_t testattr = AttrOf(newscr->_line[p].text[q]);
1005 if ((testattr & SP_PARM->_xmc_triggers) == rattr)
1007 RemAttr(NewScreen(SP_PARM)->_line[p].text[q], turnon);
1014 ("Cookie space for %s found before (%d, %d)",
1015 _traceattr(turnon), i, j));
1018 * Back up the start of range so there's room for cookies
1019 * before the first nonblank character.
1021 for (k = 1; k <= magic_cookie_glitch; k++)
1022 AddAttr(thisline[j - k], turnon);
1030 /* show altered highlights after magic-cookie check */
1031 if (USE_TRACEF(TRACE_UPDATE)) {
1032 _tracef("After magic-cookie check...");
1033 _tracedump("newscr", NewScreen(SP_PARM));
1034 _nc_unlock_global(tracef);
1038 #endif /* USE_XMC_SUPPORT */
1041 if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */
1042 ClrUpdate(NCURSES_SP_ARG);
1043 CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1044 NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */
1046 int changedlines = CHECK_INTERVAL;
1048 if (check_pending(NCURSES_SP_ARG))
1051 nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1);
1053 if (SP_PARM->_scrolling) {
1054 NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG);
1057 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1059 TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty));
1060 for (i = 0; i < nonempty; i++) {
1062 * Here is our line-breakout optimization.
1064 if (changedlines == CHECK_INTERVAL) {
1065 if (check_pending(NCURSES_SP_ARG))
1071 * newscr->line[i].firstchar is normally set
1072 * by wnoutrefresh. curscr->line[i].firstchar
1073 * is normally set by _nc_scroll_window in the
1074 * vertical-movement optimization code,
1076 if (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE
1077 || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) {
1078 TransformLine(NCURSES_SP_ARGx i);
1082 /* mark line changed successfully */
1083 if (i <= NewScreen(SP_PARM)->_maxy) {
1084 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1086 if (i <= CurScreen(SP_PARM)->_maxy) {
1087 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1092 /* put everything back in sync */
1093 for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) {
1094 MARK_NOCHANGE(NewScreen(SP_PARM), i);
1096 for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) {
1097 MARK_NOCHANGE(CurScreen(SP_PARM), i);
1100 if (!NewScreen(SP_PARM)->_leaveok) {
1101 CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx;
1102 CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury;
1104 GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx);
1109 * We would like to keep the physical screen in normal mode in case we get
1110 * other processes writing to the screen. This goal cannot be met for
1111 * magic cookies since it interferes with attributes that may propagate
1112 * past the current position.
1115 if (magic_cookie_glitch != 0)
1117 UpdateAttrs(SP_PARM, normal);
1119 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
1120 WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM));
1123 (void) times(&after);
1125 ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time",
1127 (long) (after.tms_stime - before.tms_stime),
1128 (long) (after.tms_utime - before.tms_utime)));
1129 #endif /* USE_TRACE_TIMES */
1131 _nc_signal_handler(TRUE);
1133 _nc_unlock_global(update);
1137 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
1141 return TINFO_DOUPDATE(CURRENT_SCREEN);
1148 * Returns the attributed character that corresponds to the "cleared"
1149 * screen. If the terminal has the back-color-erase feature, this will be
1150 * colored according to the wbkgd() call.
1152 * We treat 'curscr' specially because it isn't supposed to be set directly
1153 * in the wbkgd() call. Assume 'stdscr' for this case.
1155 #define BCE_ATTRS (A_NORMAL|A_COLOR)
1156 #define BCE_BKGD(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd)
1158 static NCURSES_INLINE NCURSES_CH_T
1159 ClrBlank(NCURSES_SP_DCLx WINDOW *win)
1161 NCURSES_CH_T blank = blankchar;
1162 if (back_color_erase)
1163 AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
1170 ** Update by clearing and redrawing the entire screen.
1175 ClrUpdate(NCURSES_SP_DCL0)
1177 TR(TRACE_UPDATE, (T_CALLED("ClrUpdate")));
1180 NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1181 int nonempty = min(screen_lines(SP_PARM),
1182 NewScreen(SP_PARM)->_maxy + 1);
1184 ClearScreen(NCURSES_SP_ARGx blank);
1186 TR(TRACE_UPDATE, ("updating screen from scratch"));
1188 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1190 for (i = 0; i < nonempty; i++)
1191 TransformLine(NCURSES_SP_ARGx i);
1193 TR(TRACE_UPDATE, (T_RETURN("")));
1199 ** Clear to end of current line, starting at the cursor position
1203 ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear)
1205 if (CurScreen(SP_PARM) != 0
1206 && SP_PARM->_cursrow >= 0) {
1209 for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) {
1212 &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]);
1214 if (!CharEq(*cp, blank)) {
1223 UpdateAttrs(SP_PARM, blank);
1224 if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) {
1225 NCURSES_PUTP2("clr_eol", clr_eol);
1227 int count = (screen_columns(SP_PARM) - SP_PARM->_curscol);
1229 PutChar(NCURSES_SP_ARGx CHREF(blank));
1237 ** Clear to end of screen, starting at the cursor position
1241 ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank)
1245 row = SP_PARM->_cursrow;
1246 col = SP_PARM->_curscol;
1253 UpdateAttrs(SP_PARM, blank);
1254 TPUTS_TRACE("clr_eos");
1255 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1257 screen_lines(SP_PARM) - row,
1258 NCURSES_SP_NAME(_nc_outch));
1260 while (col < screen_columns(SP_PARM))
1261 CurScreen(SP_PARM)->_line[row].text[col++] = blank;
1263 for (row++; row < screen_lines(SP_PARM); row++) {
1264 for (col = 0; col < screen_columns(SP_PARM); col++)
1265 CurScreen(SP_PARM)->_line[row].text[col] = blank;
1272 * Test if clearing the end of the screen would satisfy part of the
1273 * screen-update. Do this by scanning backwards through the lines in the
1274 * screen, checking if each is blank, and one or more are changed.
1277 ClrBottom(NCURSES_SP_DCLx int total)
1280 int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1);
1281 NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1];
1283 if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1286 for (row = total - 1; row >= 0; row--) {
1290 for (col = 0, ok = TRUE; ok && col < last; col++) {
1291 ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank));
1296 for (col = 0; ok && col < last; col++) {
1297 ok = (CharEq(CurScreen(SP_PARM)->_line[row].text[col], blank));
1303 /* don't use clr_eos for just one line if clr_eol available */
1305 GoTo(NCURSES_SP_ARGx top, 0);
1306 ClrToEOS(NCURSES_SP_ARGx blank);
1307 if (SP_PARM->oldhash && SP_PARM->newhash) {
1308 for (row = top; row < screen_lines(SP_PARM); row++)
1309 SP_PARM->oldhash[row] = SP_PARM->newhash[row];
1317 #if USE_WIDEC_SUPPORT
1318 #define check_xmc_transition(sp, a, b) \
1319 ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0)
1320 #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b))
1322 #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0)
1325 #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c]
1326 #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a)
1327 #endif /* USE_XMC_SUPPORT */
1330 ** TransformLine(lineno)
1332 ** Transform the given line in curscr to the one in newscr, using
1333 ** Insert/Delete Character if idcok && has_ic().
1335 ** firstChar = position of first different character in line
1336 ** oLastChar = position of last different character in old line
1337 ** nLastChar = position of last different character in new line
1339 ** move to firstChar
1340 ** overwrite chars up to min(oLastChar, nLastChar)
1341 ** if oLastChar < nLastChar
1342 ** insert newLine[oLastChar+1..nLastChar]
1344 ** delete oLastChar - nLastChar spaces
1348 TransformLine(NCURSES_SP_DCLx int const lineno)
1350 int firstChar, oLastChar, nLastChar;
1351 NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text;
1352 NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text;
1354 bool attrchanged = FALSE;
1356 TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno));
1358 /* copy new hash value to old one */
1359 if (SP_PARM->oldhash && SP_PARM->newhash)
1360 SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno];
1363 * If we have colors, there is the possibility of having two color pairs
1364 * that display as the same colors. For instance, Lynx does this. Check
1365 * for this case, and update the old line with the new line's colors when
1366 * they are equivalent.
1368 if (SP_PARM->_coloron) {
1372 for (n = 0; n < screen_columns(SP_PARM); n++) {
1373 if (!CharEq(newLine[n], oldLine[n])) {
1374 oldPair = GetPair(oldLine[n]);
1375 newPair = GetPair(newLine[n]);
1376 if (oldPair != newPair
1377 && unColor(oldLine[n]) == unColor(newLine[n])) {
1378 if (oldPair < SP_PARM->_pair_limit
1379 && newPair < SP_PARM->_pair_limit
1380 && (isSamePair(SP_PARM->_color_pairs[oldPair],
1381 SP_PARM->_color_pairs[newPair]))) {
1382 SetPair(oldLine[n], GetPair(newLine[n]));
1389 if (ceol_standout_glitch && clr_eol) {
1391 while (firstChar < screen_columns(SP_PARM)) {
1392 if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) {
1402 if (attrchanged) { /* we may have to disregard the whole line */
1403 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1404 ClrToEOL(NCURSES_SP_ARGx
1405 ClrBlank(NCURSES_SP_ARGx
1406 CurScreen(SP_PARM)), FALSE);
1407 PutRange(NCURSES_SP_ARGx
1408 oldLine, newLine, lineno, 0,
1409 screen_columns(SP_PARM) - 1);
1413 * This is a very simple loop to paint characters which may have the
1414 * magic cookie glitch embedded. It doesn't know much about video
1415 * attributes which are continued from one line to the next. It
1416 * assumes that we have filtered out requests for attribute changes
1417 * that do not get mapped to blank positions.
1419 * FIXME: we are not keeping track of where we put the cookies, so this
1420 * will work properly only once, since we may overwrite a cookie in a
1421 * following operation.
1423 } else if (magic_cookie_glitch > 0) {
1424 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1425 for (n = 0; n < screen_columns(SP_PARM); n++) {
1426 int m = n + magic_cookie_glitch;
1428 /* check for turn-on:
1429 * If we are writing an attributed blank, where the
1430 * previous cell is not attributed.
1432 if (ISBLANK(newLine[n])
1434 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n]))
1437 && xmc_turn_on(SP_PARM,
1438 xmc_new(SP_PARM, lineno - 1,
1439 screen_columns(SP_PARM) - 1),
1444 PutChar(NCURSES_SP_ARGx CHREF(newLine[n]));
1446 /* check for turn-off:
1447 * If we are writing an attributed non-blank, where the
1448 * next cell is blank, and not attributed.
1450 if (!ISBLANK(newLine[n])
1451 && ((n + 1 < screen_columns(SP_PARM)
1452 && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1]))
1453 || (n + 1 >= screen_columns(SP_PARM)
1454 && lineno + 1 < screen_lines(SP_PARM)
1455 && xmc_turn_off(SP_PARM,
1457 xmc_new(SP_PARM, lineno + 1, 0))))) {
1466 /* it may be cheap to clear leading whitespace with clr_bol */
1468 if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1469 int oFirstChar, nFirstChar;
1471 for (oFirstChar = 0;
1472 oFirstChar < screen_columns(SP_PARM);
1474 if (!CharEq(oldLine[oFirstChar], blank))
1476 for (nFirstChar = 0;
1477 nFirstChar < screen_columns(SP_PARM);
1479 if (!CharEq(newLine[nFirstChar], blank))
1482 if (nFirstChar == oFirstChar) {
1483 firstChar = nFirstChar;
1484 /* find the first differing character */
1485 while (firstChar < screen_columns(SP_PARM)
1486 && CharEq(newLine[firstChar], oldLine[firstChar]))
1488 } else if (oFirstChar > nFirstChar) {
1489 firstChar = nFirstChar;
1490 } else { /* oFirstChar < nFirstChar */
1491 firstChar = oFirstChar;
1492 if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) {
1493 if (nFirstChar >= screen_columns(SP_PARM)
1494 && SP_PARM->_el_cost <= SP_PARM->_el1_cost) {
1495 GoTo(NCURSES_SP_ARGx lineno, 0);
1496 UpdateAttrs(SP_PARM, blank);
1497 NCURSES_PUTP2("clr_eol", clr_eol);
1499 GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1);
1500 UpdateAttrs(SP_PARM, blank);
1501 NCURSES_PUTP2("clr_bol", clr_bol);
1504 while (firstChar < nFirstChar)
1505 oldLine[firstChar++] = blank;
1509 /* find the first differing character */
1510 while (firstChar < screen_columns(SP_PARM)
1511 && CharEq(newLine[firstChar], oldLine[firstChar]))
1514 /* if there wasn't one, we're done */
1515 if (firstChar >= screen_columns(SP_PARM)) {
1516 TR(TRACE_UPDATE, (T_RETURN("")));
1520 blank = newLine[screen_columns(SP_PARM) - 1];
1522 if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1523 /* find the last differing character */
1524 nLastChar = screen_columns(SP_PARM) - 1;
1526 while (nLastChar > firstChar
1527 && CharEq(newLine[nLastChar], oldLine[nLastChar]))
1530 if (nLastChar >= firstChar) {
1531 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1532 PutRange(NCURSES_SP_ARGx
1538 memcpy(oldLine + firstChar,
1539 newLine + firstChar,
1540 (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T));
1542 TR(TRACE_UPDATE, (T_RETURN("")));
1546 /* find last non-blank character on old line */
1547 oLastChar = screen_columns(SP_PARM) - 1;
1548 while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank))
1551 /* find last non-blank character on new line */
1552 nLastChar = screen_columns(SP_PARM) - 1;
1553 while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank))
1556 if ((nLastChar == firstChar)
1557 && (SP_PARM->_el_cost < (oLastChar - nLastChar))) {
1558 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1559 if (!CharEq(newLine[firstChar], blank))
1560 PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar]));
1561 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1562 } else if ((nLastChar != oLastChar)
1563 && (!CharEq(newLine[nLastChar], oldLine[oLastChar])
1564 || !(SP_PARM->_nc_sp_idcok
1565 && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) {
1566 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1567 if ((oLastChar - nLastChar) > SP_PARM->_el_cost) {
1568 if (PutRange(NCURSES_SP_ARGx
1574 GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1);
1576 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1578 n = max(nLastChar, oLastChar);
1579 PutRange(NCURSES_SP_ARGx
1587 int nLastNonblank = nLastChar;
1588 int oLastNonblank = oLastChar;
1590 /* find the last characters that really differ */
1591 /* can be -1 if no characters differ */
1592 while (CharEq(newLine[nLastChar], oldLine[oLastChar])) {
1593 /* don't split a wide char */
1594 if (isWidecExt(newLine[nLastChar]) &&
1595 !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1]))
1599 if (nLastChar == -1 || oLastChar == -1)
1603 n = min(oLastChar, nLastChar);
1604 if (n >= firstChar) {
1605 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1606 PutRange(NCURSES_SP_ARGx
1614 if (oLastChar < nLastChar) {
1615 int m = max(nLastNonblank, oLastNonblank);
1616 #if USE_WIDEC_SUPPORT
1618 while (isWidecExt(newLine[n + 1]) && n) {
1620 --oLastChar; /* increase cost */
1622 } else if (n >= firstChar &&
1623 isWidecBase(newLine[n])) {
1624 while (isWidecExt(newLine[n + 1])) {
1626 ++oLastChar; /* decrease cost */
1630 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1631 if ((nLastChar < nLastNonblank)
1632 || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) {
1633 PutRange(NCURSES_SP_ARGx
1640 InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar);
1642 } else if (oLastChar > nLastChar) {
1643 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1644 if (DelCharCost(SP_PARM, oLastChar - nLastChar)
1645 > SP_PARM->_el_cost + nLastNonblank - (n + 1)) {
1646 if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno,
1647 n + 1, nLastNonblank)) {
1648 GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1);
1650 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1653 * The delete-char sequence will
1654 * effectively shift in blanks from the
1655 * right margin of the screen. Ensure
1656 * that they are the right color by
1657 * setting the video attributes from
1658 * the last character on the row.
1660 UpdateAttrs(SP_PARM, blank);
1661 DelChar(NCURSES_SP_ARGx oLastChar - nLastChar);
1667 /* update the code's internal representation */
1668 if (screen_columns(SP_PARM) > firstChar)
1669 memcpy(oldLine + firstChar,
1670 newLine + firstChar,
1671 (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T));
1672 TR(TRACE_UPDATE, (T_RETURN("")));
1677 ** ClearScreen(blank)
1679 ** Clear the physical screen and put cursor at home
1684 ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank)
1687 bool fast_clear = (clear_screen || clr_eos || clr_eol);
1689 TR(TRACE_UPDATE, ("ClearScreen() called"));
1691 #if NCURSES_EXT_FUNCS
1692 if (SP_PARM->_coloron
1693 && !SP_PARM->_default_color) {
1694 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
1695 (short) GET_SCREEN_PAIR(SP_PARM),
1698 NCURSES_SP_NAME(_nc_outch));
1699 if (!back_color_erase) {
1707 UpdateAttrs(SP_PARM, blank);
1708 NCURSES_PUTP2("clear_screen", clear_screen);
1709 SP_PARM->_cursrow = SP_PARM->_curscol = 0;
1710 position_check(NCURSES_SP_ARGx
1714 } else if (clr_eos) {
1715 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1716 GoTo(NCURSES_SP_ARGx 0, 0);
1717 UpdateAttrs(SP_PARM, blank);
1718 TPUTS_TRACE("clr_eos");
1719 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1721 screen_lines(SP_PARM),
1722 NCURSES_SP_NAME(_nc_outch));
1723 } else if (clr_eol) {
1724 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1725 UpdateAttrs(SP_PARM, blank);
1726 for (i = 0; i < screen_lines(SP_PARM); i++) {
1727 GoTo(NCURSES_SP_ARGx i, 0);
1728 NCURSES_PUTP2("clr_eol", clr_eol);
1730 GoTo(NCURSES_SP_ARGx 0, 0);
1733 UpdateAttrs(SP_PARM, blank);
1734 for (i = 0; i < screen_lines(SP_PARM); i++) {
1735 GoTo(NCURSES_SP_ARGx i, 0);
1736 for (j = 0; j < screen_columns(SP_PARM); j++)
1737 PutChar(NCURSES_SP_ARGx CHREF(blank));
1739 GoTo(NCURSES_SP_ARGx 0, 0);
1742 for (i = 0; i < screen_lines(SP_PARM); i++) {
1743 for (j = 0; j < screen_columns(SP_PARM); j++)
1744 CurScreen(SP_PARM)->_line[i].text[j] = blank;
1747 TR(TRACE_UPDATE, ("screen cleared"));
1751 ** InsStr(line, count)
1753 ** Insert the count characters pointed to by line.
1758 InsStr(NCURSES_SP_DCLx NCURSES_CH_T * line, int count)
1760 TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called",
1762 (void *) line, count));
1764 /* Prefer parm_ich as it has the smallest cost - no need to shift
1765 * the whole line on each character. */
1766 /* The order must match that of InsCharCost. */
1768 TPUTS_TRACE("parm_ich");
1769 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1770 TPARM_1(parm_ich, count),
1772 NCURSES_SP_NAME(_nc_outch));
1774 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1778 } else if (enter_insert_mode && exit_insert_mode) {
1779 NCURSES_PUTP2("enter_insert_mode", enter_insert_mode);
1781 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1782 if (insert_padding) {
1783 NCURSES_PUTP2("insert_padding", insert_padding);
1788 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
1791 NCURSES_PUTP2("insert_character", insert_character);
1792 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1793 if (insert_padding) {
1794 NCURSES_PUTP2("insert_padding", insert_padding);
1800 position_check(NCURSES_SP_ARGx
1802 SP_PARM->_curscol, "InsStr");
1808 ** Delete count characters at current position
1813 DelChar(NCURSES_SP_DCLx int count)
1815 TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)",
1816 (void *) SP_PARM, count,
1817 (long) NewScreen(SP_PARM)->_cury,
1818 (long) NewScreen(SP_PARM)->_curx));
1821 TPUTS_TRACE("parm_dch");
1822 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1823 TPARM_1(parm_dch, count),
1825 NCURSES_SP_NAME(_nc_outch));
1829 for (n = 0; n < count; n++) {
1830 NCURSES_PUTP2("delete_character", delete_character);
1836 * Physical-scrolling support
1838 * This code was adapted from Keith Bostic's hardware scrolling
1839 * support for 4.4BSD curses. I (esr) translated it to use terminfo
1840 * capabilities, narrowed the call interface slightly, and cleaned
1841 * up some convoluted tests. I also added support for the memory_above
1842 * memory_below, and non_dest_scroll_region capabilities.
1844 * For this code to work, we must have either
1845 * change_scroll_region and scroll forward/reverse commands, or
1846 * insert and delete line capabilities.
1847 * When the scrolling region has been set, the cursor has to
1848 * be at the last line of the region to make the scroll up
1849 * happen, or on the first line of region to scroll down.
1851 * This code makes one aesthetic decision in the opposite way from
1852 * BSD curses. BSD curses preferred pairs of il/dl operations
1853 * over scrolls, allegedly because il/dl looked faster. We, on
1854 * the other hand, prefer scrolls because (a) they're just as fast
1855 * on many terminals and (b) using them avoids bouncing an
1856 * unchanged bottom section of the screen up and down, which is
1859 * (lav): added more cases, used dl/il when bot==maxy and in csr case.
1861 * I used assumption that capabilities il/il1/dl/dl1 work inside
1862 * changed scroll region not shifting screen contents outside of it.
1863 * If there are any terminals behaving different way, it would be
1864 * necessary to add some conditions to scroll_csr_forward/backward.
1867 /* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */
1869 scroll_csr_forward(NCURSES_SP_DCLx
1879 if (n == 1 && scroll_forward && top == miny && bot == maxy) {
1880 GoTo(NCURSES_SP_ARGx bot, 0);
1881 UpdateAttrs(SP_PARM, blank);
1882 NCURSES_PUTP2("scroll_forward", scroll_forward);
1883 } else if (n == 1 && delete_line && bot == maxy) {
1884 GoTo(NCURSES_SP_ARGx top, 0);
1885 UpdateAttrs(SP_PARM, blank);
1886 NCURSES_PUTP2("delete_line", delete_line);
1887 } else if (parm_index && top == miny && bot == maxy) {
1888 GoTo(NCURSES_SP_ARGx bot, 0);
1889 UpdateAttrs(SP_PARM, blank);
1890 TPUTS_TRACE("parm_index");
1891 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1892 TPARM_2(parm_index, n, 0),
1894 NCURSES_SP_NAME(_nc_outch));
1895 } else if (parm_delete_line && bot == maxy) {
1896 GoTo(NCURSES_SP_ARGx top, 0);
1897 UpdateAttrs(SP_PARM, blank);
1898 TPUTS_TRACE("parm_delete_line");
1899 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1900 TPARM_2(parm_delete_line, n, 0),
1902 NCURSES_SP_NAME(_nc_outch));
1903 } else if (scroll_forward && top == miny && bot == maxy) {
1904 GoTo(NCURSES_SP_ARGx bot, 0);
1905 UpdateAttrs(SP_PARM, blank);
1906 for (i = 0; i < n; i++) {
1907 NCURSES_PUTP2("scroll_forward", scroll_forward);
1909 } else if (delete_line && bot == maxy) {
1910 GoTo(NCURSES_SP_ARGx top, 0);
1911 UpdateAttrs(SP_PARM, blank);
1912 for (i = 0; i < n; i++) {
1913 NCURSES_PUTP2("delete_line", delete_line);
1918 #if NCURSES_EXT_FUNCS
1919 if (FILL_BCE(SP_PARM)) {
1921 for (i = 0; i < n; i++) {
1922 GoTo(NCURSES_SP_ARGx bot - i, 0);
1923 for (j = 0; j < screen_columns(SP_PARM); j++)
1924 PutChar(NCURSES_SP_ARGx CHREF(blank));
1931 /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */
1934 scroll_csr_backward(NCURSES_SP_DCLx
1944 if (n == 1 && scroll_reverse && top == miny && bot == maxy) {
1945 GoTo(NCURSES_SP_ARGx top, 0);
1946 UpdateAttrs(SP_PARM, blank);
1947 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1948 } else if (n == 1 && insert_line && bot == maxy) {
1949 GoTo(NCURSES_SP_ARGx top, 0);
1950 UpdateAttrs(SP_PARM, blank);
1951 NCURSES_PUTP2("insert_line", insert_line);
1952 } else if (parm_rindex && top == miny && bot == maxy) {
1953 GoTo(NCURSES_SP_ARGx top, 0);
1954 UpdateAttrs(SP_PARM, blank);
1955 TPUTS_TRACE("parm_rindex");
1956 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1957 TPARM_2(parm_rindex, n, 0),
1959 NCURSES_SP_NAME(_nc_outch));
1960 } else if (parm_insert_line && bot == maxy) {
1961 GoTo(NCURSES_SP_ARGx top, 0);
1962 UpdateAttrs(SP_PARM, blank);
1963 TPUTS_TRACE("parm_insert_line");
1964 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1965 TPARM_2(parm_insert_line, n, 0),
1967 NCURSES_SP_NAME(_nc_outch));
1968 } else if (scroll_reverse && top == miny && bot == maxy) {
1969 GoTo(NCURSES_SP_ARGx top, 0);
1970 UpdateAttrs(SP_PARM, blank);
1971 for (i = 0; i < n; i++) {
1972 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1974 } else if (insert_line && bot == maxy) {
1975 GoTo(NCURSES_SP_ARGx top, 0);
1976 UpdateAttrs(SP_PARM, blank);
1977 for (i = 0; i < n; i++) {
1978 NCURSES_PUTP2("insert_line", insert_line);
1983 #if NCURSES_EXT_FUNCS
1984 if (FILL_BCE(SP_PARM)) {
1986 for (i = 0; i < n; i++) {
1987 GoTo(NCURSES_SP_ARGx top + i, 0);
1988 for (j = 0; j < screen_columns(SP_PARM); j++)
1989 PutChar(NCURSES_SP_ARGx CHREF(blank));
1996 /* scroll by using delete_line at del and insert_line at ins */
1999 scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank)
2003 if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line)))
2006 GoTo(NCURSES_SP_ARGx del, 0);
2007 UpdateAttrs(SP_PARM, blank);
2008 if (n == 1 && delete_line) {
2009 NCURSES_PUTP2("delete_line", delete_line);
2010 } else if (parm_delete_line) {
2011 TPUTS_TRACE("parm_delete_line");
2012 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
2013 TPARM_2(parm_delete_line, n, 0),
2015 NCURSES_SP_NAME(_nc_outch));
2016 } else { /* if (delete_line) */
2017 for (i = 0; i < n; i++) {
2018 NCURSES_PUTP2("delete_line", delete_line);
2022 GoTo(NCURSES_SP_ARGx ins, 0);
2023 UpdateAttrs(SP_PARM, blank);
2024 if (n == 1 && insert_line) {
2025 NCURSES_PUTP2("insert_line", insert_line);
2026 } else if (parm_insert_line) {
2027 TPUTS_TRACE("parm_insert_line");
2028 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
2029 TPARM_2(parm_insert_line, n, 0),
2031 NCURSES_SP_NAME(_nc_outch));
2032 } else { /* if (insert_line) */
2033 for (i = 0; i < n; i++) {
2034 NCURSES_PUTP2("insert_line", insert_line);
2042 * Note: some terminals require the cursor to be within the scrolling margins
2043 * before setting them. Generally, the cursor must be at the appropriate end
2044 * of the scrolling margins when issuing an indexing operation (it is not
2045 * apparent whether it must also be at the left margin; we do this just to be
2046 * safe). To make the related cursor movement a little faster, we use the
2047 * save/restore cursor capabilities if the terminal has them.
2050 NCURSES_SP_NAME(_nc_scrolln) (NCURSES_SP_DCLx
2055 /* scroll region from top to bot by n lines */
2059 bool cursor_saved = FALSE;
2062 TR(TRACE_MOVE, ("_nc_scrolln(%p, %d, %d, %d, %d)",
2063 (void *) SP_PARM, n, top, bot, maxy));
2065 if (!IsValidScreen(SP_PARM))
2068 blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
2072 * If we scroll, we might remove a cookie.
2074 if (magic_cookie_glitch > 0) {
2079 if (n > 0) { /* scroll up (forward) */
2081 * Explicitly clear if stuff pushed off top of region might
2082 * be saved by the terminal.
2084 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, 0, maxy, blank);
2086 if (res == ERR && change_scroll_region) {
2087 if ((((n == 1 && scroll_forward) || parm_index)
2088 && (SP_PARM->_cursrow == bot || SP_PARM->_cursrow == bot - 1))
2089 && save_cursor && restore_cursor) {
2090 cursor_saved = TRUE;
2091 NCURSES_PUTP2("save_cursor", save_cursor);
2093 NCURSES_PUTP2("change_scroll_region",
2094 TPARM_2(change_scroll_region, top, bot));
2096 NCURSES_PUTP2("restore_cursor", restore_cursor);
2098 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2101 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank);
2103 NCURSES_PUTP2("change_scroll_region",
2104 TPARM_2(change_scroll_region, 0, maxy));
2105 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2108 if (res == ERR && SP_PARM->_nc_sp_idlok)
2109 res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank);
2112 * Clear the newly shifted-in text.
2115 && (non_dest_scroll_region || (memory_below && bot == maxy))) {
2116 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2117 if (bot == maxy && clr_eos) {
2118 GoTo(NCURSES_SP_ARGx bot - n + 1, 0);
2119 ClrToEOS(NCURSES_SP_ARGx blank2);
2121 for (i = 0; i < n; i++) {
2122 GoTo(NCURSES_SP_ARGx bot - i, 0);
2123 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2128 } else { /* (n < 0) - scroll down (backward) */
2129 res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank);
2131 if (res == ERR && change_scroll_region) {
2133 && (SP_PARM->_cursrow == top ||
2134 SP_PARM->_cursrow == top - 1)
2135 && save_cursor && restore_cursor) {
2136 cursor_saved = TRUE;
2137 NCURSES_PUTP2("save_cursor", save_cursor);
2139 NCURSES_PUTP2("change_scroll_region",
2140 TPARM_2(change_scroll_region, top, bot));
2142 NCURSES_PUTP2("restore_cursor", restore_cursor);
2144 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2147 res = scroll_csr_backward(NCURSES_SP_ARGx
2148 -n, top, bot, top, bot, blank);
2150 NCURSES_PUTP2("change_scroll_region",
2151 TPARM_2(change_scroll_region, 0, maxy));
2152 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2155 if (res == ERR && SP_PARM->_nc_sp_idlok)
2156 res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank);
2159 * Clear the newly shifted-in text.
2162 && (non_dest_scroll_region || (memory_above && top == 0))) {
2163 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2164 for (i = 0; i < -n; i++) {
2165 GoTo(NCURSES_SP_ARGx i + top, 0);
2166 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2174 _nc_scroll_window(CurScreen(SP_PARM), n,
2175 (NCURSES_SIZE_T) top,
2176 (NCURSES_SIZE_T) bot,
2179 /* shift hash values too - they can be reused */
2180 NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot);
2185 #if NCURSES_SP_FUNCS
2187 _nc_scrolln(int n, int top, int bot, int maxy)
2189 return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy);
2193 NCURSES_EXPORT(void)
2194 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0)
2198 /* make sure terminal is in a sane known state */
2199 SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL);
2200 NewScreen(SP_PARM)->_clear = TRUE;
2202 /* reset color pairs and definitions */
2203 if (SP_PARM->_coloron || SP_PARM->_color_defs)
2204 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2206 /* restore user-defined colors, if any */
2207 if (SP_PARM->_color_defs < 0 && !SP_PARM->_direct_color.value) {
2209 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
2210 for (n = 0; n < SP_PARM->_color_defs; ++n) {
2211 if (SP_PARM->_color_table[n].init) {
2212 _nc_init_color(SP_PARM,
2214 SP_PARM->_color_table[n].r,
2215 SP_PARM->_color_table[n].g,
2216 SP_PARM->_color_table[n].b);
2221 if (exit_attribute_mode)
2222 NCURSES_PUTP2("exit_attribute_mode", exit_attribute_mode);
2224 /* turn off attributes */
2225 if (exit_alt_charset_mode)
2226 NCURSES_PUTP2("exit_alt_charset_mode", exit_alt_charset_mode);
2227 if (exit_standout_mode)
2228 NCURSES_PUTP2("exit_standout_mode", exit_standout_mode);
2229 if (exit_underline_mode)
2230 NCURSES_PUTP2("exit_underline_mode", exit_underline_mode);
2232 if (exit_insert_mode)
2233 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
2234 if (enter_am_mode && exit_am_mode) {
2235 if (auto_right_margin) {
2236 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
2238 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
2243 #if NCURSES_SP_FUNCS
2244 NCURSES_EXPORT(void)
2245 _nc_screen_resume(void)
2247 NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN);
2251 NCURSES_EXPORT(void)
2252 NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0)
2254 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
2257 #if NCURSES_SP_FUNCS
2258 NCURSES_EXPORT(void)
2259 _nc_screen_init(void)
2261 NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN);
2265 /* wrap up screen handling */
2266 NCURSES_EXPORT(void)
2267 NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0)
2271 UpdateAttrs(SP_PARM, normal);
2272 #if NCURSES_EXT_FUNCS
2273 if (SP_PARM->_coloron
2274 && !SP_PARM->_default_color) {
2275 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
2276 SP_PARM->_default_color = TRUE;
2277 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
2281 NCURSES_SP_NAME(_nc_outch));
2282 SP_PARM->_default_color = FALSE;
2284 TINFO_MVCUR(NCURSES_SP_ARGx
2287 screen_lines(SP_PARM) - 1,
2290 ClrToEOL(NCURSES_SP_ARGx blank, TRUE);
2293 if (SP_PARM->_color_defs) {
2294 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2299 #if NCURSES_SP_FUNCS
2300 NCURSES_EXPORT(void)
2301 _nc_screen_wrap(void)
2303 NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN);
2308 NCURSES_EXPORT(void)
2309 NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous)
2312 attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM)));
2316 SP_PARM->_curscol += magic_cookie_glitch;
2317 if (SP_PARM->_curscol >= SP_PARM->_columns)
2318 wrap_cursor(NCURSES_SP_ARG);
2319 TR(TRACE_UPDATE, ("bumped to %d,%d after cookie",
2320 SP_PARM->_cursrow, SP_PARM->_curscol));
2327 #if NCURSES_SP_FUNCS
2328 NCURSES_EXPORT(void)
2329 _nc_do_xmc_glitch(attr_t previous)
2331 NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous);
2335 #endif /* USE_XMC_SUPPORT */