1 /****************************************************************************
2 * Copyright (c) 1998-2014,2015 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer 2009 *
34 ****************************************************************************/
36 /*-----------------------------------------------------------------
40 * The routine doupdate() and its dependents.
41 * All physical output is concentrated here (except _nc_outch()
44 *-----------------------------------------------------------------*/
46 #include <curses.priv.h>
49 #define CUR SP_TERMTYPE
52 #if defined __HAIKU__ && defined __BEOS__
62 #if defined(TRACE) && HAVE_SYS_TIMES_H && HAVE_TIMES
63 #define USE_TRACE_TIMES 1
65 #define USE_TRACE_TIMES 0
68 #if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT
73 #include <sys/times.h>
79 #include <sys/select.h>
85 MODULE_ID("$Id: tty_update.c,v 1.281 2015/12/13 00:39:28 tom Exp $")
88 * This define controls the line-breakout optimization. Every once in a
89 * while during screen refresh, we want to check for input and abort the
90 * update if there's some waiting. CHECK_INTERVAL controls the number of
91 * changed lines to be emitted between input checks.
93 * Note: Input-check-and-abort is no longer done if the screen is being
94 * updated from scratch. This is a feature, not a bug.
96 #define CHECK_INTERVAL 5
98 #define FILL_BCE(sp) (sp->_coloron && !sp->_default_color && !back_color_erase)
100 static const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT);
101 static NCURSES_CH_T normal = NewChar(BLANK_TEXT);
104 * Enable checking to see if doupdate and friends are tracking the true
105 * cursor position correctly. NOTE: this is a debugging hack which will
106 * work ONLY on ANSI-compatible terminals!
108 /* #define POSITION_DEBUG */
110 static NCURSES_INLINE NCURSES_CH_T ClrBlank(NCURSES_SP_DCLx WINDOW *win);
113 static int ClrBottom(SCREEN *, int total);
114 static void ClearScreen(SCREEN *, NCURSES_CH_T blank);
115 static void ClrUpdate(SCREEN *);
116 static void DelChar(SCREEN *, int count);
117 static void InsStr(SCREEN *, NCURSES_CH_T * line, int count);
118 static void TransformLine(SCREEN *, int const lineno);
120 static int ClrBottom(int total);
121 static void ClearScreen(NCURSES_CH_T blank);
122 static void ClrUpdate(void);
123 static void DelChar(int count);
124 static void InsStr(NCURSES_CH_T * line, int count);
125 static void TransformLine(int const lineno);
128 #ifdef POSITION_DEBUG
129 /****************************************************************************
131 * Debugging code. Only works on ANSI-standard terminals.
133 ****************************************************************************/
136 position_check(NCURSES_SP_DCLx int expected_y, int expected_x, char *legend)
137 /* check to see if the real cursor position matches the virtual */
143 if (!_nc_tracing || (expected_y < 0 && expected_x < 0))
146 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
147 memset(buf, '\0', sizeof(buf));
148 NCURSES_PUTP2_FLUSH("cpr", "\033[6n"); /* only works on ANSI-compatibles */
151 int ask = sizeof(buf) - 1 - (s - buf);
152 int got = read(0, s, ask);
156 } while (strchr(buf, 'R') == 0);
157 _tracef("probe returned %s", _nc_visbuf(buf));
159 /* try to interpret as a position report */
160 if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) {
161 _tracef("position probe failed in %s", legend);
167 if (y - 1 != expected_y || x - 1 != expected_x) {
168 NCURSES_SP_NAME(beep) (NCURSES_SP_ARG);
169 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
173 1, NCURSES_SP_NAME(_nc_outch));
174 _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s",
175 y - 1, x - 1, expected_y, expected_x, legend);
177 _tracef("position matches OK in %s", legend);
182 #define position_check(expected_y, expected_x, legend) /* nothing */
183 #endif /* POSITION_DEBUG */
185 /****************************************************************************
187 * Optimized update code
189 ****************************************************************************/
191 static NCURSES_INLINE void
192 GoTo(NCURSES_SP_DCLx int const row, int const col)
194 TR(TRACE_MOVE, ("GoTo(%p, %d, %d) from (%d, %d)",
195 (void *) SP_PARM, row, col, SP_PARM->_cursrow, SP_PARM->_curscol));
197 position_check(NCURSES_SP_ARGx
199 SP_PARM->_curscol, "GoTo");
201 TINFO_MVCUR(NCURSES_SP_ARGx
205 position_check(NCURSES_SP_ARGx
207 SP_PARM->_curscol, "GoTo2");
210 static NCURSES_INLINE void
211 PutAttrChar(NCURSES_SP_DCLx CARG_CH_T ch)
215 #if USE_WIDEC_SUPPORT
219 NCURSES_CH_T attr = CHDEREF(ch);
221 TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)",
223 SP_PARM->_cursrow, SP_PARM->_curscol));
224 #if USE_WIDEC_SUPPORT
226 * If this is not a valid character, there is nothing more to do.
228 if (isWidecExt(CHDEREF(ch))) {
229 TR(TRACE_CHARPUT, ("...skip"));
233 * Determine the number of character cells which the 'ch' value will use
234 * on the screen. It should be at least one.
236 if ((chlen = wcwidth(CharOf(CHDEREF(ch)))) <= 0) {
237 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
240 * If the character falls into any of these special cases, do
241 * not force the result to a blank:
243 * a) it is printable (this works around a bug in wcwidth()).
244 * b) use_legacy_coding() has been called to modify the treatment
246 * c) the acs_map[] has been initialized to allow codes 0-31
247 * to be rendered. This supports Linux console's "PC"
248 * characters. Codes 128-255 are allowed though this is
251 if (is8bits(CharOf(CHDEREF(ch)))
252 && (isprint(CharOf(CHDEREF(ch)))
253 || (SP_PARM->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160)
254 || (SP_PARM->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128)
255 || (AttrOf(attr) & A_ALTCHARSET
256 && ((CharOfD(ch) < ACS_LEN
257 && SP_PARM->_acs_map != 0
258 && SP_PARM->_acs_map[CharOfD(ch)] != 0)
259 || (CharOfD(ch) >= 128))))) {
263 TR(TRACE_CHARPUT, ("forced to blank"));
269 if ((AttrOf(attr) & A_ALTCHARSET)
270 && SP_PARM->_acs_map != 0
271 && CharOfD(ch) < ACS_LEN) {
272 my_ch = CHDEREF(ch); /* work around const param */
273 #if USE_WIDEC_SUPPORT
275 * This is crude & ugly, but works most of the time. It checks if the
276 * acs_chars string specified that we have a mapping for this
277 * character, and uses the wide-character mapping when we expect the
278 * normal one to be broken (by mis-design ;-).
280 if (SP_PARM->_screen_unicode
281 && _nc_wacs[CharOf(my_ch)].chars[0]) {
282 if (SP_PARM->_screen_acs_map[CharOf(my_ch)]) {
283 if (SP_PARM->_screen_acs_fix) {
284 RemAttr(attr, A_ALTCHARSET);
285 my_ch = _nc_wacs[CharOf(my_ch)];
288 RemAttr(attr, A_ALTCHARSET);
289 my_ch = _nc_wacs[CharOf(my_ch)];
294 * If we (still) have alternate character set, it is the normal 8bit
295 * flavor. The _screen_acs_map[] array tells if the character was
296 * really in acs_chars, needed because of the way wide/normal line
297 * drawing flavors are integrated.
299 if (AttrOf(attr) & A_ALTCHARSET) {
301 chtype temp = UChar(SP_PARM->_acs_map[j]);
304 SetChar(my_ch, temp, AttrOf(attr));
307 RemAttr(attr, A_ALTCHARSET);
312 if (tilde_glitch && (CharOfD(ch) == L('~'))) {
313 SetChar(tilde, L('`'), AttrOf(attr));
317 UpdateAttrs(SP_PARM, attr);
319 #if !USE_WIDEC_SUPPORT
322 SP_PARM->_curscol += chlen;
324 NCURSES_PUTP2("char_padding", char_padding);
329 check_pending(NCURSES_SP_DCL0)
330 /* check for pending input */
332 bool have_pending = FALSE;
335 * Only carry out this check when the flag is zero, otherwise we'll
336 * have the refreshing slow down drastically (or stop) if there's an
337 * unread character available.
339 if (SP_PARM->_fifohold != 0)
342 if (SP_PARM->_checkfd >= 0) {
344 struct pollfd fds[1];
345 fds[0].fd = SP_PARM->_checkfd;
346 fds[0].events = POLLIN;
347 if (poll(fds, (size_t) 1, 0) > 0) {
350 #elif defined(__BEOS__)
352 * BeOS's select() is declared in socket.h, so the configure script does
353 * not see it. That's just as well, since that function works only for
354 * sockets. This (using snooze and ioctl) was distilled from Be's patch
355 * for ncurses which uses a separate thread to simulate select().
357 * FIXME: the return values from the ioctl aren't very clear if we get
361 int howmany = ioctl(0, 'ichr', &n);
362 if (howmany >= 0 && n > 0) {
367 struct timeval ktimeout;
370 ktimeout.tv_usec = 0;
373 FD_SET(SP_PARM->_checkfd, &fdset);
374 if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) {
380 SP_PARM->_fifohold = 5;
381 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
386 /* put char at lower right corner */
388 PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch)
390 if (!auto_right_margin) {
391 /* we can put the char directly */
392 PutAttrChar(NCURSES_SP_ARGx ch);
393 } else if (enter_am_mode && exit_am_mode) {
394 /* we can suppress automargin */
395 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
397 PutAttrChar(NCURSES_SP_ARGx ch);
399 position_check(NCURSES_SP_ARGx
404 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
405 } else if ((enter_insert_mode && exit_insert_mode)
406 || insert_character || parm_ich) {
408 screen_lines(SP_PARM) - 1,
409 screen_columns(SP_PARM) - 2);
410 PutAttrChar(NCURSES_SP_ARGx ch);
412 screen_lines(SP_PARM) - 1,
413 screen_columns(SP_PARM) - 2);
414 InsStr(NCURSES_SP_ARGx
415 NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text +
416 screen_columns(SP_PARM) - 2, 1);
421 * Wrap the cursor position, i.e., advance to the beginning of the next line.
424 wrap_cursor(NCURSES_SP_DCL0)
426 if (eat_newline_glitch) {
428 * xenl can manifest two different ways. The vt100 way is that, when
429 * you'd expect the cursor to wrap, it stays hung at the right margin
430 * (on top of the character just emitted) and doesn't wrap until the
431 * *next* graphic char is emitted. The c100 way is to ignore LF
432 * received just after an am wrap.
434 * An aggressive way to handle this would be to emit CR/LF after the
435 * char and then assume the wrap is done, you're on the first position
436 * of the next line, and the terminal out of its weird state. Here
437 * it's safe to just tell the code that the cursor is in hyperspace and
438 * let the next mvcur() call straighten things out.
440 SP_PARM->_curscol = -1;
441 SP_PARM->_cursrow = -1;
442 } else if (auto_right_margin) {
443 SP_PARM->_curscol = 0;
446 * We've actually moved - but may have to work around problems with
447 * video attributes not working.
449 if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) {
450 TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping",
451 (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)),
452 _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM)))));
453 (void) VIDATTR(SP_PARM, A_NORMAL, 0);
458 position_check(NCURSES_SP_ARGx
464 static NCURSES_INLINE void
465 PutChar(NCURSES_SP_DCLx const ARG_CH_T ch)
466 /* insert character, handling automargin stuff */
468 if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 &&
469 SP_PARM->_curscol == screen_columns(SP_PARM) - 1) {
470 PutCharLR(NCURSES_SP_ARGx ch);
472 PutAttrChar(NCURSES_SP_ARGx ch);
475 if (SP_PARM->_curscol >= screen_columns(SP_PARM))
476 wrap_cursor(NCURSES_SP_ARG);
478 position_check(NCURSES_SP_ARGx
480 SP_PARM->_curscol, "PutChar");
484 * Check whether the given character can be output by clearing commands. This
485 * includes test for being a space and not including any 'bad' attributes, such
486 * as A_REVERSE. All attribute flags which don't affect appearance of a space
487 * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded.
489 static NCURSES_INLINE bool
490 can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch)
492 if (!back_color_erase && SP_PARM->_coloron) {
493 #if NCURSES_EXT_FUNCS
496 if (!SP_PARM->_default_color)
498 if (SP_PARM->_default_fg != C_MASK || SP_PARM->_default_bg != C_MASK)
500 if ((pair = GetPair(CHDEREF(ch))) != 0) {
501 NCURSES_COLOR_T fg, bg;
502 if (NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx
505 || (fg != C_MASK || bg != C_MASK)) {
510 if (AttrOfD(ch) & A_COLOR)
514 return (ISBLANK(CHDEREF(ch)) &&
515 (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR);
519 * Issue a given span of characters from an array.
520 * Must be functionally equivalent to:
521 * for (i = 0; i < num; i++)
523 * but can leave the cursor positioned at the middle of the interval.
525 * Returns: 0 - cursor is at the end of interval
526 * 1 - cursor is somewhere in the middle
528 * This code is optimized using ech and rep.
531 EmitRange(NCURSES_SP_DCLx const NCURSES_CH_T * ntext, int num)
535 TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num)));
537 if (erase_chars || repeat_char) {
542 while (num > 1 && !CharEq(ntext[0], ntext[1])) {
543 PutChar(NCURSES_SP_ARGx CHREF(ntext[0]));
549 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
554 while (runcount < num && CharEq(ntext[runcount], ntext0))
558 * The cost expression in the middle isn't exactly right.
559 * _cup_ch_cost is an upper bound on the cost for moving to the
560 * end of the erased area, but not the cost itself (which we
561 * can't compute without emitting the move). This may result
562 * in erase_chars not getting used in some situations for
563 * which it would be marginally advantageous.
566 && runcount > SP_PARM->_ech_cost + SP_PARM->_cup_ch_cost
567 && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) {
568 UpdateAttrs(SP_PARM, ntext0);
569 NCURSES_PUTP2("erase_chars", TPARM_1(erase_chars, runcount));
572 * If this is the last part of the given interval,
573 * don't bother moving cursor, since it can be the
574 * last update on the line.
576 if (runcount < num) {
579 SP_PARM->_curscol + runcount);
581 return 1; /* cursor stays in the middle */
583 } else if (repeat_char && runcount > SP_PARM->_rep_cost) {
584 bool wrap_possible = (SP_PARM->_curscol + runcount >=
585 screen_columns(SP_PARM));
586 int rep_count = runcount;
591 UpdateAttrs(SP_PARM, ntext0);
592 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
597 NCURSES_SP_NAME(_nc_outch));
598 SP_PARM->_curscol += rep_count;
601 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
603 for (i = 0; i < runcount; i++)
604 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
612 for (i = 0; i < num; i++)
613 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
618 * Output the line in the given range [first .. last]
620 * If there's a run of identical characters that's long enough to justify
621 * cursor movement, use that also.
623 * Returns: same as EmitRange
626 PutRange(NCURSES_SP_DCLx
627 const NCURSES_CH_T * otext,
628 const NCURSES_CH_T * ntext,
635 TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)",
637 (const void *) otext,
638 (const void *) ntext,
642 && (last - first + 1) > SP_PARM->_inline_cost) {
643 for (j = first, same = 0; j <= last; j++) {
644 if (!same && isWidecExt(otext[j]))
646 if (CharEq(otext[j], ntext[j])) {
649 if (same > SP_PARM->_inline_cost) {
650 EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
651 GoTo(NCURSES_SP_ARGx row, first = j);
656 i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
658 * Always return 1 for the next GoTo() after a PutRange() if we found
659 * identical characters at end of interval
661 rc = (same == 0 ? i : 1);
663 rc = EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1);
668 /* leave unbracketed here so 'indent' works */
669 #define MARK_NOCHANGE(win,row) \
670 win->_line[row].firstchar = _NOCHANGE; \
671 win->_line[row].lastchar = _NOCHANGE; \
672 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row)
675 TINFO_DOUPDATE(NCURSES_SP_DCL0)
680 struct tms before, after;
681 #endif /* USE_TRACE_TIMES */
683 T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM));
690 * It is "legal" but unlikely that an application could assign a new
691 * value to one of the standard windows. Check for that possibility
692 * and try to recover.
694 * We do not allow applications to assign new values in the reentrant
697 #define SyncScreens(internal,exported) \
698 if (internal == 0) internal = exported; \
699 if (internal != exported) exported = internal
701 SyncScreens(CurScreen(SP_PARM), curscr);
702 SyncScreens(NewScreen(SP_PARM), newscr);
703 SyncScreens(StdScreen(SP_PARM), stdscr);
706 if (CurScreen(SP_PARM) == 0
707 || NewScreen(SP_PARM) == 0
708 || StdScreen(SP_PARM) == 0)
712 if (USE_TRACEF(TRACE_UPDATE)) {
713 if (CurScreen(SP_PARM)->_clear)
714 _tracef("curscr is clear");
716 _tracedump("curscr", CurScreen(SP_PARM));
717 _tracedump("newscr", NewScreen(SP_PARM));
718 _nc_unlock_global(tracef);
722 _nc_signal_handler(FALSE);
724 if (SP_PARM->_fifohold)
725 SP_PARM->_fifohold--;
728 if (SP_PARM->_endwin || _nc_handle_sigwinch(SP_PARM)) {
730 * This is a transparent extension: XSI does not address it,
731 * and applications need not know that ncurses can do it.
733 * Check if the terminal size has changed while curses was off
734 * (this can happen in an xterm, for example), and resize the
735 * ncurses data structures accordingly.
737 _nc_update_screensize(SP_PARM);
741 if (SP_PARM->_endwin) {
743 T(("coming back from shell mode"));
744 NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG);
746 NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG);
747 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
748 SP_PARM->_mouse_resume(SP_PARM);
750 SP_PARM->_endwin = FALSE;
753 /* zero the metering machinery */
755 (void) times(&before);
756 #endif /* USE_TRACE_TIMES */
759 * This is the support for magic-cookie terminals. The theory: we scan
760 * the virtual screen looking for attribute turnons. Where we find one,
761 * check to make sure it's realizable by seeing if the required number of
762 * un-attributed blanks are present before and after the attributed range;
763 * try to shift the range boundaries over blanks (not changing the screen
764 * display) so this becomes true. If it is, shift the beginning attribute
765 * change appropriately (the end one, if we've gotten this far, is
766 * guaranteed room for its cookie). If not, nuke the added attributes out
770 if (magic_cookie_glitch > 0) {
772 attr_t rattr = A_NORMAL;
774 for (i = 0; i < screen_lines(SP_PARM); i++) {
775 for (j = 0; j < screen_columns(SP_PARM); j++) {
777 NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text;
778 attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers;
779 attr_t turnon = thisattr & ~rattr;
781 /* is an attribute turned on here? */
787 TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr)));
788 TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon)));
791 * If the attribute change location is a blank with a "safe"
792 * attribute, undo the attribute turnon. This may ensure
793 * there's enough room to set the attribute before the first
794 * non-blank in the run.
796 #define SAFE(scr,a) (!((a) & (scr)->_xmc_triggers))
797 if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) {
798 RemAttr(thisline[j], turnon);
802 /* check that there's enough room at start of span */
803 for (k = 1; k <= magic_cookie_glitch; k++) {
805 || !ISBLANK(thisline[j - k])
806 || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) {
808 TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s",
810 (ISBLANK(thisline[j - k])
813 (SAFE(SP_PARM, AttrOf(thisline[j - k]))
820 bool end_onscreen = FALSE;
823 /* find end of span, if it's onscreen */
824 for (m = i; m < screen_lines(SP_PARM); m++) {
825 for (; n < screen_columns(SP_PARM); n++) {
827 AttrOf(NewScreen(SP_PARM)->_line[m].text[n]);
828 if ((testattr & SP_PARM->_xmc_triggers) == rattr) {
831 ("Range attributed with %s ends at (%d, %d)",
832 _traceattr(turnon), m, n));
839 ("Range attributed with %s ends offscreen",
840 _traceattr(turnon)));
844 NCURSES_CH_T *lastline =
845 NewScreen(SP_PARM)->_line[m].text;
848 * If there are safely-attributed blanks at the end of
849 * the range, shorten the range. This will help ensure
850 * that there is enough room at end of span.
853 && ISBLANK(lastline[n])
854 && SAFE(SP_PARM, AttrOf(lastline[n]))) {
855 RemAttr(lastline[n--], turnon);
858 /* check that there's enough room at end of span */
859 for (k = 1; k <= magic_cookie_glitch; k++) {
860 if (n + k >= screen_columns(SP_PARM)
861 || !ISBLANK(lastline[n + k])
862 || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) {
865 ("No room at end in %d,%d%s%s",
867 (ISBLANK(lastline[n + k])
870 (SAFE(SP_PARM, AttrOf(lastline[n + k]))
883 ("Clearing %s beginning at (%d, %d)",
884 _traceattr(turnon), i, j));
886 /* turn off new attributes over span */
887 for (p = i; p < screen_lines(SP_PARM); p++) {
888 for (; q < screen_columns(SP_PARM); q++) {
889 attr_t testattr = AttrOf(newscr->_line[p].text[q]);
890 if ((testattr & SP_PARM->_xmc_triggers) == rattr)
892 RemAttr(NewScreen(SP_PARM)->_line[p].text[q], turnon);
899 ("Cookie space for %s found before (%d, %d)",
900 _traceattr(turnon), i, j));
903 * Back up the start of range so there's room for cookies
904 * before the first nonblank character.
906 for (k = 1; k <= magic_cookie_glitch; k++)
907 AddAttr(thisline[j - k], turnon);
915 /* show altered highlights after magic-cookie check */
916 if (USE_TRACEF(TRACE_UPDATE)) {
917 _tracef("After magic-cookie check...");
918 _tracedump("newscr", NewScreen(SP_PARM));
919 _nc_unlock_global(tracef);
923 #endif /* USE_XMC_SUPPORT */
926 if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */
927 ClrUpdate(NCURSES_SP_ARG);
928 CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */
929 NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */
931 int changedlines = CHECK_INTERVAL;
933 if (check_pending(NCURSES_SP_ARG))
936 nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1);
938 if (SP_PARM->_scrolling) {
939 NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG);
942 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
944 TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty));
945 for (i = 0; i < nonempty; i++) {
947 * Here is our line-breakout optimization.
949 if (changedlines == CHECK_INTERVAL) {
950 if (check_pending(NCURSES_SP_ARG))
956 * newscr->line[i].firstchar is normally set
957 * by wnoutrefresh. curscr->line[i].firstchar
958 * is normally set by _nc_scroll_window in the
959 * vertical-movement optimization code,
961 if (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE
962 || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) {
963 TransformLine(NCURSES_SP_ARGx i);
967 /* mark line changed successfully */
968 if (i <= NewScreen(SP_PARM)->_maxy) {
969 MARK_NOCHANGE(NewScreen(SP_PARM), i);
971 if (i <= CurScreen(SP_PARM)->_maxy) {
972 MARK_NOCHANGE(CurScreen(SP_PARM), i);
977 /* put everything back in sync */
978 for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) {
979 MARK_NOCHANGE(NewScreen(SP_PARM), i);
981 for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) {
982 MARK_NOCHANGE(CurScreen(SP_PARM), i);
985 if (!NewScreen(SP_PARM)->_leaveok) {
986 CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx;
987 CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury;
989 GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx);
994 * We would like to keep the physical screen in normal mode in case we get
995 * other processes writing to the screen. This goal cannot be met for
996 * magic cookies since it interferes with attributes that may propagate
997 * past the current position.
1000 if (magic_cookie_glitch != 0)
1002 UpdateAttrs(SP_PARM, normal);
1004 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
1005 WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM));
1008 (void) times(&after);
1010 ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time",
1012 (long) (after.tms_stime - before.tms_stime),
1013 (long) (after.tms_utime - before.tms_utime)));
1014 #endif /* USE_TRACE_TIMES */
1016 _nc_signal_handler(TRUE);
1021 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
1025 return TINFO_DOUPDATE(CURRENT_SCREEN);
1032 * Returns the attributed character that corresponds to the "cleared"
1033 * screen. If the terminal has the back-color-erase feature, this will be
1034 * colored according to the wbkgd() call.
1036 * We treat 'curscr' specially because it isn't supposed to be set directly
1037 * in the wbkgd() call. Assume 'stdscr' for this case.
1039 #define BCE_ATTRS (A_NORMAL|A_COLOR)
1040 #define BCE_BKGD(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd)
1042 static NCURSES_INLINE NCURSES_CH_T
1043 ClrBlank(NCURSES_SP_DCLx WINDOW *win)
1045 NCURSES_CH_T blank = blankchar;
1046 if (back_color_erase)
1047 AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
1054 ** Update by clearing and redrawing the entire screen.
1059 ClrUpdate(NCURSES_SP_DCL0)
1061 TR(TRACE_UPDATE, (T_CALLED("ClrUpdate")));
1064 NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1065 int nonempty = min(screen_lines(SP_PARM),
1066 NewScreen(SP_PARM)->_maxy + 1);
1068 ClearScreen(NCURSES_SP_ARGx blank);
1070 TR(TRACE_UPDATE, ("updating screen from scratch"));
1072 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1074 for (i = 0; i < nonempty; i++)
1075 TransformLine(NCURSES_SP_ARGx i);
1077 TR(TRACE_UPDATE, (T_RETURN("")));
1083 ** Clear to end of current line, starting at the cursor position
1087 ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear)
1091 if (CurScreen(SP_PARM) != 0
1092 && SP_PARM->_cursrow >= 0) {
1093 for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) {
1096 &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]);
1098 if (!CharEq(*cp, blank)) {
1107 UpdateAttrs(SP_PARM, blank);
1108 if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) {
1109 NCURSES_PUTP2("clr_eol", clr_eol);
1111 int count = (screen_columns(SP_PARM) - SP_PARM->_curscol);
1113 PutChar(NCURSES_SP_ARGx CHREF(blank));
1121 ** Clear to end of screen, starting at the cursor position
1125 ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank)
1129 row = SP_PARM->_cursrow;
1130 col = SP_PARM->_curscol;
1137 UpdateAttrs(SP_PARM, blank);
1138 TPUTS_TRACE("clr_eos");
1139 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1141 screen_lines(SP_PARM) - row,
1142 NCURSES_SP_NAME(_nc_outch));
1144 while (col < screen_columns(SP_PARM))
1145 CurScreen(SP_PARM)->_line[row].text[col++] = blank;
1147 for (row++; row < screen_lines(SP_PARM); row++) {
1148 for (col = 0; col < screen_columns(SP_PARM); col++)
1149 CurScreen(SP_PARM)->_line[row].text[col] = blank;
1156 * Test if clearing the end of the screen would satisfy part of the
1157 * screen-update. Do this by scanning backwards through the lines in the
1158 * screen, checking if each is blank, and one or more are changed.
1161 ClrBottom(NCURSES_SP_DCLx int total)
1166 int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1);
1167 NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1];
1170 if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1172 for (row = total - 1; row >= 0; row--) {
1173 for (col = 0, ok = TRUE; ok && col < last; col++) {
1174 ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank));
1179 for (col = 0; ok && col < last; col++) {
1180 ok = (CharEq(CurScreen(SP_PARM)->_line[row].text[col], blank));
1186 /* don't use clr_eos for just one line if clr_eol available */
1188 GoTo(NCURSES_SP_ARGx top, 0);
1189 ClrToEOS(NCURSES_SP_ARGx blank);
1190 if (SP_PARM->oldhash && SP_PARM->newhash) {
1191 for (row = top; row < screen_lines(SP_PARM); row++)
1192 SP_PARM->oldhash[row] = SP_PARM->newhash[row];
1200 #if USE_WIDEC_SUPPORT
1201 #define check_xmc_transition(sp, a, b) \
1202 ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0)
1203 #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b))
1205 #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0)
1208 #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c]
1209 #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a)
1210 #endif /* USE_XMC_SUPPORT */
1213 ** TransformLine(lineno)
1215 ** Transform the given line in curscr to the one in newscr, using
1216 ** Insert/Delete Character if idcok && has_ic().
1218 ** firstChar = position of first different character in line
1219 ** oLastChar = position of last different character in old line
1220 ** nLastChar = position of last different character in new line
1222 ** move to firstChar
1223 ** overwrite chars up to min(oLastChar, nLastChar)
1224 ** if oLastChar < nLastChar
1225 ** insert newLine[oLastChar+1..nLastChar]
1227 ** delete oLastChar - nLastChar spaces
1231 TransformLine(NCURSES_SP_DCLx int const lineno)
1233 int firstChar, oLastChar, nLastChar;
1234 NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text;
1235 NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text;
1237 bool attrchanged = FALSE;
1239 TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno));
1241 /* copy new hash value to old one */
1242 if (SP_PARM->oldhash && SP_PARM->newhash)
1243 SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno];
1246 * If we have colors, there is the possibility of having two color pairs
1247 * that display as the same colors. For instance, Lynx does this. Check
1248 * for this case, and update the old line with the new line's colors when
1249 * they are equivalent.
1251 if (SP_PARM->_coloron) {
1255 for (n = 0; n < screen_columns(SP_PARM); n++) {
1256 if (!CharEq(newLine[n], oldLine[n])) {
1257 oldPair = GetPair(oldLine[n]);
1258 newPair = GetPair(newLine[n]);
1259 if (oldPair != newPair
1260 && unColor(oldLine[n]) == unColor(newLine[n])) {
1261 if (oldPair < SP_PARM->_pair_limit
1262 && newPair < SP_PARM->_pair_limit
1263 && (SP_PARM->_color_pairs[oldPair] ==
1264 SP_PARM->_color_pairs[newPair])) {
1265 SetPair(oldLine[n], GetPair(newLine[n]));
1272 if (ceol_standout_glitch && clr_eol) {
1274 while (firstChar < screen_columns(SP_PARM)) {
1275 if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) {
1285 if (attrchanged) { /* we may have to disregard the whole line */
1286 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1287 ClrToEOL(NCURSES_SP_ARGx
1288 ClrBlank(NCURSES_SP_ARGx
1289 CurScreen(SP_PARM)), FALSE);
1290 PutRange(NCURSES_SP_ARGx
1291 oldLine, newLine, lineno, 0,
1292 screen_columns(SP_PARM) - 1);
1296 * This is a very simple loop to paint characters which may have the
1297 * magic cookie glitch embedded. It doesn't know much about video
1298 * attributes which are continued from one line to the next. It
1299 * assumes that we have filtered out requests for attribute changes
1300 * that do not get mapped to blank positions.
1302 * FIXME: we are not keeping track of where we put the cookies, so this
1303 * will work properly only once, since we may overwrite a cookie in a
1304 * following operation.
1306 } else if (magic_cookie_glitch > 0) {
1307 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1308 for (n = 0; n < screen_columns(SP_PARM); n++) {
1309 int m = n + magic_cookie_glitch;
1311 /* check for turn-on:
1312 * If we are writing an attributed blank, where the
1313 * previous cell is not attributed.
1315 if (ISBLANK(newLine[n])
1317 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n]))
1320 && xmc_turn_on(SP_PARM,
1321 xmc_new(SP_PARM, lineno - 1,
1322 screen_columns(SP_PARM) - 1),
1327 PutChar(NCURSES_SP_ARGx CHREF(newLine[n]));
1329 /* check for turn-off:
1330 * If we are writing an attributed non-blank, where the
1331 * next cell is blank, and not attributed.
1333 if (!ISBLANK(newLine[n])
1334 && ((n + 1 < screen_columns(SP_PARM)
1335 && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1]))
1336 || (n + 1 >= screen_columns(SP_PARM)
1337 && lineno + 1 < screen_lines(SP_PARM)
1338 && xmc_turn_off(SP_PARM,
1340 xmc_new(SP_PARM, lineno + 1, 0))))) {
1349 /* it may be cheap to clear leading whitespace with clr_bol */
1351 if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1352 int oFirstChar, nFirstChar;
1354 for (oFirstChar = 0;
1355 oFirstChar < screen_columns(SP_PARM);
1357 if (!CharEq(oldLine[oFirstChar], blank))
1359 for (nFirstChar = 0;
1360 nFirstChar < screen_columns(SP_PARM);
1362 if (!CharEq(newLine[nFirstChar], blank))
1365 if (nFirstChar == oFirstChar) {
1366 firstChar = nFirstChar;
1367 /* find the first differing character */
1368 while (firstChar < screen_columns(SP_PARM)
1369 && CharEq(newLine[firstChar], oldLine[firstChar]))
1371 } else if (oFirstChar > nFirstChar) {
1372 firstChar = nFirstChar;
1373 } else { /* oFirstChar < nFirstChar */
1374 firstChar = oFirstChar;
1375 if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) {
1376 if (nFirstChar >= screen_columns(SP_PARM)
1377 && SP_PARM->_el_cost <= SP_PARM->_el1_cost) {
1378 GoTo(NCURSES_SP_ARGx lineno, 0);
1379 UpdateAttrs(SP_PARM, blank);
1380 NCURSES_PUTP2("clr_eol", clr_eol);
1382 GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1);
1383 UpdateAttrs(SP_PARM, blank);
1384 NCURSES_PUTP2("clr_bol", clr_bol);
1387 while (firstChar < nFirstChar)
1388 oldLine[firstChar++] = blank;
1392 /* find the first differing character */
1393 while (firstChar < screen_columns(SP_PARM)
1394 && CharEq(newLine[firstChar], oldLine[firstChar]))
1397 /* if there wasn't one, we're done */
1398 if (firstChar >= screen_columns(SP_PARM)) {
1399 TR(TRACE_UPDATE, (T_RETURN("")));
1403 blank = newLine[screen_columns(SP_PARM) - 1];
1405 if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1406 /* find the last differing character */
1407 nLastChar = screen_columns(SP_PARM) - 1;
1409 while (nLastChar > firstChar
1410 && CharEq(newLine[nLastChar], oldLine[nLastChar]))
1413 if (nLastChar >= firstChar) {
1414 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1415 PutRange(NCURSES_SP_ARGx
1421 memcpy(oldLine + firstChar,
1422 newLine + firstChar,
1423 (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T));
1425 TR(TRACE_UPDATE, (T_RETURN("")));
1429 /* find last non-blank character on old line */
1430 oLastChar = screen_columns(SP_PARM) - 1;
1431 while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank))
1434 /* find last non-blank character on new line */
1435 nLastChar = screen_columns(SP_PARM) - 1;
1436 while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank))
1439 if ((nLastChar == firstChar)
1440 && (SP_PARM->_el_cost < (oLastChar - nLastChar))) {
1441 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1442 if (!CharEq(newLine[firstChar], blank))
1443 PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar]));
1444 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1445 } else if ((nLastChar != oLastChar)
1446 && (!CharEq(newLine[nLastChar], oldLine[oLastChar])
1447 || !(SP_PARM->_nc_sp_idcok
1448 && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) {
1449 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1450 if ((oLastChar - nLastChar) > SP_PARM->_el_cost) {
1451 if (PutRange(NCURSES_SP_ARGx
1457 GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1);
1459 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1461 n = max(nLastChar, oLastChar);
1462 PutRange(NCURSES_SP_ARGx
1470 int nLastNonblank = nLastChar;
1471 int oLastNonblank = oLastChar;
1473 /* find the last characters that really differ */
1474 /* can be -1 if no characters differ */
1475 while (CharEq(newLine[nLastChar], oldLine[oLastChar])) {
1476 /* don't split a wide char */
1477 if (isWidecExt(newLine[nLastChar]) &&
1478 !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1]))
1482 if (nLastChar == -1 || oLastChar == -1)
1486 n = min(oLastChar, nLastChar);
1487 if (n >= firstChar) {
1488 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1489 PutRange(NCURSES_SP_ARGx
1497 if (oLastChar < nLastChar) {
1498 int m = max(nLastNonblank, oLastNonblank);
1499 #if USE_WIDEC_SUPPORT
1501 while (isWidecExt(newLine[n + 1]) && n) {
1503 --oLastChar; /* increase cost */
1505 } else if (n >= firstChar &&
1506 isWidecBase(newLine[n])) {
1507 while (isWidecExt(newLine[n + 1])) {
1509 ++oLastChar; /* decrease cost */
1513 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1514 if ((nLastChar < nLastNonblank)
1515 || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) {
1516 PutRange(NCURSES_SP_ARGx
1523 InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar);
1525 } else if (oLastChar > nLastChar) {
1526 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1527 if (DelCharCost(SP_PARM, oLastChar - nLastChar)
1528 > SP_PARM->_el_cost + nLastNonblank - (n + 1)) {
1529 if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno,
1530 n + 1, nLastNonblank)) {
1531 GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1);
1533 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1536 * The delete-char sequence will
1537 * effectively shift in blanks from the
1538 * right margin of the screen. Ensure
1539 * that they are the right color by
1540 * setting the video attributes from
1541 * the last character on the row.
1543 UpdateAttrs(SP_PARM, blank);
1544 DelChar(NCURSES_SP_ARGx oLastChar - nLastChar);
1550 /* update the code's internal representation */
1551 if (screen_columns(SP_PARM) > firstChar)
1552 memcpy(oldLine + firstChar,
1553 newLine + firstChar,
1554 (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T));
1555 TR(TRACE_UPDATE, (T_RETURN("")));
1560 ** ClearScreen(blank)
1562 ** Clear the physical screen and put cursor at home
1567 ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank)
1570 bool fast_clear = (clear_screen || clr_eos || clr_eol);
1572 TR(TRACE_UPDATE, ("ClearScreen() called"));
1574 #if NCURSES_EXT_FUNCS
1575 if (SP_PARM->_coloron
1576 && !SP_PARM->_default_color) {
1577 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
1578 (short) GET_SCREEN_PAIR(SP_PARM),
1581 NCURSES_SP_NAME(_nc_outch));
1582 if (!back_color_erase) {
1590 UpdateAttrs(SP_PARM, blank);
1591 NCURSES_PUTP2("clear_screen", clear_screen);
1592 SP_PARM->_cursrow = SP_PARM->_curscol = 0;
1593 position_check(NCURSES_SP_ARGx
1597 } else if (clr_eos) {
1598 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1599 GoTo(NCURSES_SP_ARGx 0, 0);
1600 UpdateAttrs(SP_PARM, blank);
1601 TPUTS_TRACE("clr_eos");
1602 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1604 screen_lines(SP_PARM),
1605 NCURSES_SP_NAME(_nc_outch));
1606 } else if (clr_eol) {
1607 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1608 UpdateAttrs(SP_PARM, blank);
1609 for (i = 0; i < screen_lines(SP_PARM); i++) {
1610 GoTo(NCURSES_SP_ARGx i, 0);
1611 NCURSES_PUTP2("clr_eol", clr_eol);
1613 GoTo(NCURSES_SP_ARGx 0, 0);
1616 UpdateAttrs(SP_PARM, blank);
1617 for (i = 0; i < screen_lines(SP_PARM); i++) {
1618 GoTo(NCURSES_SP_ARGx i, 0);
1619 for (j = 0; j < screen_columns(SP_PARM); j++)
1620 PutChar(NCURSES_SP_ARGx CHREF(blank));
1622 GoTo(NCURSES_SP_ARGx 0, 0);
1625 for (i = 0; i < screen_lines(SP_PARM); i++) {
1626 for (j = 0; j < screen_columns(SP_PARM); j++)
1627 CurScreen(SP_PARM)->_line[i].text[j] = blank;
1630 TR(TRACE_UPDATE, ("screen cleared"));
1634 ** InsStr(line, count)
1636 ** Insert the count characters pointed to by line.
1641 InsStr(NCURSES_SP_DCLx NCURSES_CH_T * line, int count)
1643 TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called",
1645 (void *) line, count));
1647 /* Prefer parm_ich as it has the smallest cost - no need to shift
1648 * the whole line on each character. */
1649 /* The order must match that of InsCharCost. */
1651 TPUTS_TRACE("parm_ich");
1652 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1653 TPARM_1(parm_ich, count),
1655 NCURSES_SP_NAME(_nc_outch));
1657 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1661 } else if (enter_insert_mode && exit_insert_mode) {
1662 NCURSES_PUTP2("enter_insert_mode", enter_insert_mode);
1664 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1665 if (insert_padding) {
1666 NCURSES_PUTP2("insert_padding", insert_padding);
1671 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
1674 NCURSES_PUTP2("insert_character", insert_character);
1675 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1676 if (insert_padding) {
1677 NCURSES_PUTP2("insert_padding", insert_padding);
1683 position_check(NCURSES_SP_ARGx
1685 SP_PARM->_curscol, "InsStr");
1691 ** Delete count characters at current position
1696 DelChar(NCURSES_SP_DCLx int count)
1700 TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)",
1701 (void *) SP_PARM, count,
1702 (long) NewScreen(SP_PARM)->_cury,
1703 (long) NewScreen(SP_PARM)->_curx));
1706 TPUTS_TRACE("parm_dch");
1707 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1708 TPARM_1(parm_dch, count),
1710 NCURSES_SP_NAME(_nc_outch));
1712 for (n = 0; n < count; n++) {
1713 NCURSES_PUTP2("delete_character", delete_character);
1719 * Physical-scrolling support
1721 * This code was adapted from Keith Bostic's hardware scrolling
1722 * support for 4.4BSD curses. I (esr) translated it to use terminfo
1723 * capabilities, narrowed the call interface slightly, and cleaned
1724 * up some convoluted tests. I also added support for the memory_above
1725 * memory_below, and non_dest_scroll_region capabilities.
1727 * For this code to work, we must have either
1728 * change_scroll_region and scroll forward/reverse commands, or
1729 * insert and delete line capabilities.
1730 * When the scrolling region has been set, the cursor has to
1731 * be at the last line of the region to make the scroll up
1732 * happen, or on the first line of region to scroll down.
1734 * This code makes one aesthetic decision in the opposite way from
1735 * BSD curses. BSD curses preferred pairs of il/dl operations
1736 * over scrolls, allegedly because il/dl looked faster. We, on
1737 * the other hand, prefer scrolls because (a) they're just as fast
1738 * on many terminals and (b) using them avoids bouncing an
1739 * unchanged bottom section of the screen up and down, which is
1742 * (lav): added more cases, used dl/il when bot==maxy and in csr case.
1744 * I used assumption that capabilities il/il1/dl/dl1 work inside
1745 * changed scroll region not shifting screen contents outside of it.
1746 * If there are any terminals behaving different way, it would be
1747 * necessary to add some conditions to scroll_csr_forward/backward.
1750 /* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */
1752 scroll_csr_forward(NCURSES_SP_DCLx
1762 if (n == 1 && scroll_forward && top == miny && bot == maxy) {
1763 GoTo(NCURSES_SP_ARGx bot, 0);
1764 UpdateAttrs(SP_PARM, blank);
1765 NCURSES_PUTP2("scroll_forward", scroll_forward);
1766 } else if (n == 1 && delete_line && bot == maxy) {
1767 GoTo(NCURSES_SP_ARGx top, 0);
1768 UpdateAttrs(SP_PARM, blank);
1769 NCURSES_PUTP2("delete_line", delete_line);
1770 } else if (parm_index && top == miny && bot == maxy) {
1771 GoTo(NCURSES_SP_ARGx bot, 0);
1772 UpdateAttrs(SP_PARM, blank);
1773 TPUTS_TRACE("parm_index");
1774 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1775 TPARM_2(parm_index, n, 0),
1777 NCURSES_SP_NAME(_nc_outch));
1778 } else if (parm_delete_line && bot == maxy) {
1779 GoTo(NCURSES_SP_ARGx top, 0);
1780 UpdateAttrs(SP_PARM, blank);
1781 TPUTS_TRACE("parm_delete_line");
1782 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1783 TPARM_2(parm_delete_line, n, 0),
1785 NCURSES_SP_NAME(_nc_outch));
1786 } else if (scroll_forward && top == miny && bot == maxy) {
1787 GoTo(NCURSES_SP_ARGx bot, 0);
1788 UpdateAttrs(SP_PARM, blank);
1789 for (i = 0; i < n; i++) {
1790 NCURSES_PUTP2("scroll_forward", scroll_forward);
1792 } else if (delete_line && bot == maxy) {
1793 GoTo(NCURSES_SP_ARGx top, 0);
1794 UpdateAttrs(SP_PARM, blank);
1795 for (i = 0; i < n; i++) {
1796 NCURSES_PUTP2("delete_line", delete_line);
1801 #if NCURSES_EXT_FUNCS
1802 if (FILL_BCE(SP_PARM)) {
1804 for (i = 0; i < n; i++) {
1805 GoTo(NCURSES_SP_ARGx bot - i, 0);
1806 for (j = 0; j < screen_columns(SP_PARM); j++)
1807 PutChar(NCURSES_SP_ARGx CHREF(blank));
1814 /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */
1817 scroll_csr_backward(NCURSES_SP_DCLx
1827 if (n == 1 && scroll_reverse && top == miny && bot == maxy) {
1828 GoTo(NCURSES_SP_ARGx top, 0);
1829 UpdateAttrs(SP_PARM, blank);
1830 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1831 } else if (n == 1 && insert_line && bot == maxy) {
1832 GoTo(NCURSES_SP_ARGx top, 0);
1833 UpdateAttrs(SP_PARM, blank);
1834 NCURSES_PUTP2("insert_line", insert_line);
1835 } else if (parm_rindex && top == miny && bot == maxy) {
1836 GoTo(NCURSES_SP_ARGx top, 0);
1837 UpdateAttrs(SP_PARM, blank);
1838 TPUTS_TRACE("parm_rindex");
1839 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1840 TPARM_2(parm_rindex, n, 0),
1842 NCURSES_SP_NAME(_nc_outch));
1843 } else if (parm_insert_line && bot == maxy) {
1844 GoTo(NCURSES_SP_ARGx top, 0);
1845 UpdateAttrs(SP_PARM, blank);
1846 TPUTS_TRACE("parm_insert_line");
1847 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1848 TPARM_2(parm_insert_line, n, 0),
1850 NCURSES_SP_NAME(_nc_outch));
1851 } else if (scroll_reverse && top == miny && bot == maxy) {
1852 GoTo(NCURSES_SP_ARGx top, 0);
1853 UpdateAttrs(SP_PARM, blank);
1854 for (i = 0; i < n; i++) {
1855 NCURSES_PUTP2("scroll_reverse", scroll_reverse);
1857 } else if (insert_line && bot == maxy) {
1858 GoTo(NCURSES_SP_ARGx top, 0);
1859 UpdateAttrs(SP_PARM, blank);
1860 for (i = 0; i < n; i++) {
1861 NCURSES_PUTP2("insert_line", insert_line);
1866 #if NCURSES_EXT_FUNCS
1867 if (FILL_BCE(SP_PARM)) {
1869 for (i = 0; i < n; i++) {
1870 GoTo(NCURSES_SP_ARGx top + i, 0);
1871 for (j = 0; j < screen_columns(SP_PARM); j++)
1872 PutChar(NCURSES_SP_ARGx CHREF(blank));
1879 /* scroll by using delete_line at del and insert_line at ins */
1882 scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank)
1886 if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line)))
1889 GoTo(NCURSES_SP_ARGx del, 0);
1890 UpdateAttrs(SP_PARM, blank);
1891 if (n == 1 && delete_line) {
1892 NCURSES_PUTP2("delete_line", delete_line);
1893 } else if (parm_delete_line) {
1894 TPUTS_TRACE("parm_delete_line");
1895 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1896 TPARM_2(parm_delete_line, n, 0),
1898 NCURSES_SP_NAME(_nc_outch));
1899 } else { /* if (delete_line) */
1900 for (i = 0; i < n; i++) {
1901 NCURSES_PUTP2("delete_line", delete_line);
1905 GoTo(NCURSES_SP_ARGx ins, 0);
1906 UpdateAttrs(SP_PARM, blank);
1907 if (n == 1 && insert_line) {
1908 NCURSES_PUTP2("insert_line", insert_line);
1909 } else if (parm_insert_line) {
1910 TPUTS_TRACE("parm_insert_line");
1911 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1912 TPARM_2(parm_insert_line, n, 0),
1914 NCURSES_SP_NAME(_nc_outch));
1915 } else { /* if (insert_line) */
1916 for (i = 0; i < n; i++) {
1917 NCURSES_PUTP2("insert_line", insert_line);
1925 * Note: some terminals require the cursor to be within the scrolling margins
1926 * before setting them. Generally, the cursor must be at the appropriate end
1927 * of the scrolling margins when issuing an indexing operation (it is not
1928 * apparent whether it must also be at the left margin; we do this just to be
1929 * safe). To make the related cursor movement a little faster, we use the
1930 * save/restore cursor capabilities if the terminal has them.
1933 NCURSES_SP_NAME(_nc_scrolln) (NCURSES_SP_DCLx
1938 /* scroll region from top to bot by n lines */
1942 bool cursor_saved = FALSE;
1945 TR(TRACE_MOVE, ("_nc_scrolln(%p, %d, %d, %d, %d)",
1946 (void *) SP_PARM, n, top, bot, maxy));
1948 if (!IsValidScreen(SP_PARM))
1951 blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1955 * If we scroll, we might remove a cookie.
1957 if (magic_cookie_glitch > 0) {
1962 if (n > 0) { /* scroll up (forward) */
1964 * Explicitly clear if stuff pushed off top of region might
1965 * be saved by the terminal.
1967 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, 0, maxy, blank);
1969 if (res == ERR && change_scroll_region) {
1970 if ((((n == 1 && scroll_forward) || parm_index)
1971 && (SP_PARM->_cursrow == bot || SP_PARM->_cursrow == bot - 1))
1972 && save_cursor && restore_cursor) {
1973 cursor_saved = TRUE;
1974 NCURSES_PUTP2("save_cursor", save_cursor);
1976 NCURSES_PUTP2("change_scroll_region",
1977 TPARM_2(change_scroll_region, top, bot));
1979 NCURSES_PUTP2("restore_cursor", restore_cursor);
1981 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1984 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank);
1986 NCURSES_PUTP2("change_scroll_region",
1987 TPARM_2(change_scroll_region, 0, maxy));
1988 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1991 if (res == ERR && SP_PARM->_nc_sp_idlok)
1992 res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank);
1995 * Clear the newly shifted-in text.
1998 && (non_dest_scroll_region || (memory_below && bot == maxy))) {
1999 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2000 if (bot == maxy && clr_eos) {
2001 GoTo(NCURSES_SP_ARGx bot - n + 1, 0);
2002 ClrToEOS(NCURSES_SP_ARGx blank2);
2004 for (i = 0; i < n; i++) {
2005 GoTo(NCURSES_SP_ARGx bot - i, 0);
2006 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2011 } else { /* (n < 0) - scroll down (backward) */
2012 res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank);
2014 if (res == ERR && change_scroll_region) {
2016 && (SP_PARM->_cursrow == top ||
2017 SP_PARM->_cursrow == top - 1)
2018 && save_cursor && restore_cursor) {
2019 cursor_saved = TRUE;
2020 NCURSES_PUTP2("save_cursor", save_cursor);
2022 NCURSES_PUTP2("change_scroll_region",
2023 TPARM_2(change_scroll_region, top, bot));
2025 NCURSES_PUTP2("restore_cursor", restore_cursor);
2027 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2030 res = scroll_csr_backward(NCURSES_SP_ARGx
2031 -n, top, bot, top, bot, blank);
2033 NCURSES_PUTP2("change_scroll_region",
2034 TPARM_2(change_scroll_region, 0, maxy));
2035 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2038 if (res == ERR && SP_PARM->_nc_sp_idlok)
2039 res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank);
2042 * Clear the newly shifted-in text.
2045 && (non_dest_scroll_region || (memory_above && top == 0))) {
2046 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2047 for (i = 0; i < -n; i++) {
2048 GoTo(NCURSES_SP_ARGx i + top, 0);
2049 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2057 _nc_scroll_window(CurScreen(SP_PARM), n,
2058 (NCURSES_SIZE_T) top,
2059 (NCURSES_SIZE_T) bot,
2062 /* shift hash values too - they can be reused */
2063 NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot);
2068 #if NCURSES_SP_FUNCS
2070 _nc_scrolln(int n, int top, int bot, int maxy)
2072 return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy);
2076 NCURSES_EXPORT(void)
2077 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0)
2081 /* make sure terminal is in a sane known state */
2082 SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL);
2083 NewScreen(SP_PARM)->_clear = TRUE;
2085 /* reset color pairs and definitions */
2086 if (SP_PARM->_coloron || SP_PARM->_color_defs)
2087 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2089 /* restore user-defined colors, if any */
2090 if (SP_PARM->_color_defs < 0) {
2092 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
2093 for (n = 0; n < SP_PARM->_color_defs; ++n) {
2094 if (SP_PARM->_color_table[n].init) {
2095 NCURSES_SP_NAME(init_color) (NCURSES_SP_ARGx
2097 SP_PARM->_color_table[n].r,
2098 SP_PARM->_color_table[n].g,
2099 SP_PARM->_color_table[n].b);
2104 if (exit_attribute_mode)
2105 NCURSES_PUTP2("exit_attribute_mode", exit_attribute_mode);
2107 /* turn off attributes */
2108 if (exit_alt_charset_mode)
2109 NCURSES_PUTP2("exit_alt_charset_mode", exit_alt_charset_mode);
2110 if (exit_standout_mode)
2111 NCURSES_PUTP2("exit_standout_mode", exit_standout_mode);
2112 if (exit_underline_mode)
2113 NCURSES_PUTP2("exit_underline_mode", exit_underline_mode);
2115 if (exit_insert_mode)
2116 NCURSES_PUTP2("exit_insert_mode", exit_insert_mode);
2117 if (enter_am_mode && exit_am_mode) {
2118 if (auto_right_margin) {
2119 NCURSES_PUTP2("enter_am_mode", enter_am_mode);
2121 NCURSES_PUTP2("exit_am_mode", exit_am_mode);
2126 #if NCURSES_SP_FUNCS
2127 NCURSES_EXPORT(void)
2128 _nc_screen_resume(void)
2130 NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN);
2134 NCURSES_EXPORT(void)
2135 NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0)
2137 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
2140 #if NCURSES_SP_FUNCS
2141 NCURSES_EXPORT(void)
2142 _nc_screen_init(void)
2144 NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN);
2148 /* wrap up screen handling */
2149 NCURSES_EXPORT(void)
2150 NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0)
2154 UpdateAttrs(SP_PARM, normal);
2155 #if NCURSES_EXT_FUNCS
2156 if (SP_PARM->_coloron
2157 && !SP_PARM->_default_color) {
2158 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
2159 SP_PARM->_default_color = TRUE;
2160 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
2164 NCURSES_SP_NAME(_nc_outch));
2165 SP_PARM->_default_color = FALSE;
2167 TINFO_MVCUR(NCURSES_SP_ARGx
2170 screen_lines(SP_PARM) - 1,
2173 ClrToEOL(NCURSES_SP_ARGx blank, TRUE);
2176 if (SP_PARM->_color_defs) {
2177 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2182 #if NCURSES_SP_FUNCS
2183 NCURSES_EXPORT(void)
2184 _nc_screen_wrap(void)
2186 NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN);
2191 NCURSES_EXPORT(void)
2192 NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous)
2195 attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM)));
2199 SP_PARM->_curscol += magic_cookie_glitch;
2200 if (SP_PARM->_curscol >= SP_PARM->_columns)
2201 wrap_cursor(NCURSES_SP_ARG);
2202 TR(TRACE_UPDATE, ("bumped to %d,%d after cookie",
2203 SP_PARM->_cursrow, SP_PARM->_curscol));
2210 #if NCURSES_SP_FUNCS
2211 NCURSES_EXPORT(void)
2212 _nc_do_xmc_glitch(attr_t previous)
2214 NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous);
2218 #endif /* USE_XMC_SUPPORT */