1 /****************************************************************************
2 * Copyright (c) 1998-2011,2012 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 1.273 2012/12/22 21:38:17 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_SP_NAME(putp) (NCURSES_SP_ARGx "\033[6n"); /* only works on ANSI-compatibles */
149 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
152 int ask = sizeof(buf) - 1 - (s - buf);
153 int got = read(0, s, ask);
157 } while (strchr(buf, 'R') == 0);
158 _tracef("probe returned %s", _nc_visbuf(buf));
160 /* try to interpret as a position report */
161 if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) {
162 _tracef("position probe failed in %s", legend);
168 if (y - 1 != expected_y || x - 1 != expected_x) {
169 NCURSES_SP_NAME(beep) (NCURSES_SP_ARG);
170 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
174 1, NCURSES_SP_NAME(_nc_outch));
175 _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s",
176 y - 1, x - 1, expected_y, expected_x, legend);
178 _tracef("position matches OK in %s", legend);
183 #define position_check(sp, expected_y, expected_x, legend) /* nothing */
184 #endif /* POSITION_DEBUG */
186 /****************************************************************************
188 * Optimized update code
190 ****************************************************************************/
192 static NCURSES_INLINE void
193 GoTo(NCURSES_SP_DCLx int const row, int const col)
195 TR(TRACE_MOVE, ("GoTo(%p, %d, %d) from (%d, %d)",
196 (void *) SP_PARM, row, col, SP_PARM->_cursrow, SP_PARM->_curscol));
198 position_check(SP_PARM, SP_PARM->_cursrow, SP_PARM->_curscol, "GoTo");
200 TINFO_MVCUR(NCURSES_SP_ARGx
204 position_check(SP_PARM, SP_PARM->_cursrow, SP_PARM->_curscol, "GoTo2");
207 static NCURSES_INLINE void
208 PutAttrChar(NCURSES_SP_DCLx CARG_CH_T ch)
212 #if USE_WIDEC_SUPPORT
216 NCURSES_CH_T attr = CHDEREF(ch);
218 TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)",
220 SP_PARM->_cursrow, SP_PARM->_curscol));
221 #if USE_WIDEC_SUPPORT
223 * If this is not a valid character, there is nothing more to do.
225 if (isWidecExt(CHDEREF(ch))) {
226 TR(TRACE_CHARPUT, ("...skip"));
230 * Determine the number of character cells which the 'ch' value will use
231 * on the screen. It should be at least one.
233 if ((chlen = wcwidth(CharOf(CHDEREF(ch)))) <= 0) {
234 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
237 * If the character falls into any of these special cases, do
238 * not force the result to a blank:
240 * a) it is printable (this works around a bug in wcwidth()).
241 * b) use_legacy_coding() has been called to modify the treatment
243 * c) the acs_map[] has been initialized to allow codes 0-31
244 * to be rendered. This supports Linux console's "PC"
245 * characters. Codes 128-255 are allowed though this is
248 if (is8bits(CharOf(CHDEREF(ch)))
249 && (isprint(CharOf(CHDEREF(ch)))
250 || (SP_PARM->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160)
251 || (SP_PARM->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128)
252 || (AttrOf(attr) & A_ALTCHARSET
253 && ((CharOfD(ch) < ACS_LEN
254 && SP_PARM->_acs_map != 0
255 && SP_PARM->_acs_map[CharOfD(ch)] != 0)
256 || (CharOfD(ch) >= 128))))) {
260 TR(TRACE_CHARPUT, ("forced to blank"));
266 if ((AttrOf(attr) & A_ALTCHARSET)
267 && SP_PARM->_acs_map != 0
268 && CharOfD(ch) < ACS_LEN) {
269 my_ch = CHDEREF(ch); /* work around const param */
270 #if USE_WIDEC_SUPPORT
272 * This is crude & ugly, but works most of the time. It checks if the
273 * acs_chars string specified that we have a mapping for this
274 * character, and uses the wide-character mapping when we expect the
275 * normal one to be broken (by mis-design ;-).
277 if (SP_PARM->_screen_acs_fix
278 && SP_PARM->_screen_acs_map[CharOf(my_ch)]) {
279 RemAttr(attr, A_ALTCHARSET);
280 my_ch = _nc_wacs[CharOf(my_ch)];
281 } else if (SP_PARM->_screen_unicode
282 && !SP_PARM->_screen_acs_map[CharOf(my_ch)]
283 && _nc_wacs[CharOf(my_ch)].chars[0]) {
284 RemAttr(attr, A_ALTCHARSET);
285 my_ch = _nc_wacs[CharOf(my_ch)];
289 * If we (still) have alternate character set, it is the normal 8bit
290 * flavor. The _screen_acs_map[] array tells if the character was
291 * really in acs_chars, needed because of the way wide/normal line
292 * drawing flavors are integrated.
294 if (AttrOf(attr) & A_ALTCHARSET) {
296 chtype temp = UChar(SP_PARM->_acs_map[j]);
299 SetChar(my_ch, temp, AttrOf(attr));
302 RemAttr(attr, A_ALTCHARSET);
307 if (tilde_glitch && (CharOfD(ch) == L('~'))) {
308 SetChar(tilde, L('`'), AttrOf(attr));
312 UpdateAttrs(SP_PARM, attr);
314 #if !USE_WIDEC_SUPPORT
317 SP_PARM->_curscol += chlen;
319 TPUTS_TRACE("char_padding");
320 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx char_padding);
325 check_pending(NCURSES_SP_DCL0)
326 /* check for pending input */
328 bool have_pending = FALSE;
331 * Only carry out this check when the flag is zero, otherwise we'll
332 * have the refreshing slow down drastically (or stop) if there's an
333 * unread character available.
335 if (SP_PARM->_fifohold != 0)
338 if (SP_PARM->_checkfd >= 0) {
340 struct pollfd fds[1];
341 fds[0].fd = SP_PARM->_checkfd;
342 fds[0].events = POLLIN;
343 if (poll(fds, (size_t) 1, 0) > 0) {
346 #elif defined(__BEOS__)
348 * BeOS's select() is declared in socket.h, so the configure script does
349 * not see it. That's just as well, since that function works only for
350 * sockets. This (using snooze and ioctl) was distilled from Be's patch
351 * for ncurses which uses a separate thread to simulate select().
353 * FIXME: the return values from the ioctl aren't very clear if we get
357 int howmany = ioctl(0, 'ichr', &n);
358 if (howmany >= 0 && n > 0) {
363 struct timeval ktimeout;
366 ktimeout.tv_usec = 0;
369 FD_SET(SP_PARM->_checkfd, &fdset);
370 if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) {
376 SP_PARM->_fifohold = 5;
377 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
382 /* put char at lower right corner */
384 PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch)
386 if (!auto_right_margin) {
387 /* we can put the char directly */
388 PutAttrChar(NCURSES_SP_ARGx ch);
389 } else if (enter_am_mode && exit_am_mode) {
390 /* we can suppress automargin */
391 TPUTS_TRACE("exit_am_mode");
392 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_am_mode);
394 PutAttrChar(NCURSES_SP_ARGx ch);
396 position_check(SP_PARM,
401 TPUTS_TRACE("enter_am_mode");
402 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx enter_am_mode);
403 } else if ((enter_insert_mode && exit_insert_mode)
404 || insert_character || parm_ich) {
406 screen_lines(SP_PARM) - 1,
407 screen_columns(SP_PARM) - 2);
408 PutAttrChar(NCURSES_SP_ARGx ch);
410 screen_lines(SP_PARM) - 1,
411 screen_columns(SP_PARM) - 2);
412 InsStr(NCURSES_SP_ARGx
413 NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text +
414 screen_columns(SP_PARM) - 2, 1);
419 * Wrap the cursor position, i.e., advance to the beginning of the next line.
422 wrap_cursor(NCURSES_SP_DCL0)
424 if (eat_newline_glitch) {
426 * xenl can manifest two different ways. The vt100 way is that, when
427 * you'd expect the cursor to wrap, it stays hung at the right margin
428 * (on top of the character just emitted) and doesn't wrap until the
429 * *next* graphic char is emitted. The c100 way is to ignore LF
430 * received just after an am wrap.
432 * An aggressive way to handle this would be to emit CR/LF after the
433 * char and then assume the wrap is done, you're on the first position
434 * of the next line, and the terminal out of its weird state. Here
435 * it's safe to just tell the code that the cursor is in hyperspace and
436 * let the next mvcur() call straighten things out.
438 SP_PARM->_curscol = -1;
439 SP_PARM->_cursrow = -1;
440 } else if (auto_right_margin) {
441 SP_PARM->_curscol = 0;
444 * We've actually moved - but may have to work around problems with
445 * video attributes not working.
447 if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) {
448 TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping",
449 (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)),
450 _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM)))));
451 (void) VIDATTR(SP_PARM, A_NORMAL, 0);
456 position_check(SP_PARM,
462 static NCURSES_INLINE void
463 PutChar(NCURSES_SP_DCLx const ARG_CH_T ch)
464 /* insert character, handling automargin stuff */
466 if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 &&
467 SP_PARM->_curscol == screen_columns(SP_PARM) - 1) {
468 PutCharLR(NCURSES_SP_ARGx ch);
470 PutAttrChar(NCURSES_SP_ARGx ch);
473 if (SP_PARM->_curscol >= screen_columns(SP_PARM))
474 wrap_cursor(NCURSES_SP_ARG);
476 position_check(SP_PARM, SP_PARM->_cursrow, SP_PARM->_curscol, "PutChar");
480 * Check whether the given character can be output by clearing commands. This
481 * includes test for being a space and not including any 'bad' attributes, such
482 * as A_REVERSE. All attribute flags which don't affect appearance of a space
483 * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded.
485 static NCURSES_INLINE bool
486 can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch)
488 if (!back_color_erase && SP_PARM->_coloron) {
489 #if NCURSES_EXT_FUNCS
492 if (!SP_PARM->_default_color)
494 if (SP_PARM->_default_fg != C_MASK || SP_PARM->_default_bg != C_MASK)
496 if ((pair = GetPair(CHDEREF(ch))) != 0) {
498 NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx
501 if (fg != C_MASK || bg != C_MASK)
505 if (AttrOfD(ch) & A_COLOR)
509 return (ISBLANK(CHDEREF(ch)) &&
510 (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR);
514 * Issue a given span of characters from an array.
515 * Must be functionally equivalent to:
516 * for (i = 0; i < num; i++)
518 * but can leave the cursor positioned at the middle of the interval.
520 * Returns: 0 - cursor is at the end of interval
521 * 1 - cursor is somewhere in the middle
523 * This code is optimized using ech and rep.
526 EmitRange(NCURSES_SP_DCLx const NCURSES_CH_T * ntext, int num)
530 TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num)));
532 if (erase_chars || repeat_char) {
537 while (num > 1 && !CharEq(ntext[0], ntext[1])) {
538 PutChar(NCURSES_SP_ARGx CHREF(ntext[0]));
544 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
549 while (runcount < num && CharEq(ntext[runcount], ntext0))
553 * The cost expression in the middle isn't exactly right.
554 * _cup_ch_cost is an upper bound on the cost for moving to the
555 * end of the erased area, but not the cost itself (which we
556 * can't compute without emitting the move). This may result
557 * in erase_chars not getting used in some situations for
558 * which it would be marginally advantageous.
561 && runcount > SP_PARM->_ech_cost + SP_PARM->_cup_ch_cost
562 && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) {
563 UpdateAttrs(SP_PARM, ntext0);
564 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
565 TPARM_1(erase_chars, runcount));
568 * If this is the last part of the given interval,
569 * don't bother moving cursor, since it can be the
570 * last update on the line.
572 if (runcount < num) {
575 SP_PARM->_curscol + runcount);
577 return 1; /* cursor stays in the middle */
579 } else if (repeat_char && runcount > SP_PARM->_rep_cost) {
580 bool wrap_possible = (SP_PARM->_curscol + runcount >=
581 screen_columns(SP_PARM));
582 int rep_count = runcount;
587 UpdateAttrs(SP_PARM, ntext0);
588 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
593 NCURSES_SP_NAME(_nc_outch));
594 SP_PARM->_curscol += rep_count;
597 PutChar(NCURSES_SP_ARGx CHREF(ntext0));
599 for (i = 0; i < runcount; i++)
600 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
608 for (i = 0; i < num; i++)
609 PutChar(NCURSES_SP_ARGx CHREF(ntext[i]));
614 * Output the line in the given range [first .. last]
616 * If there's a run of identical characters that's long enough to justify
617 * cursor movement, use that also.
619 * Returns: same as EmitRange
622 PutRange(NCURSES_SP_DCLx
623 const NCURSES_CH_T * otext,
624 const NCURSES_CH_T * ntext,
630 TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)",
632 (const void *) otext,
633 (const void *) ntext,
637 && (last - first + 1) > SP_PARM->_inline_cost) {
638 for (j = first, same = 0; j <= last; j++) {
639 if (!same && isWidecExt(otext[j]))
641 if (CharEq(otext[j], ntext[j])) {
644 if (same > SP_PARM->_inline_cost) {
645 EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
646 GoTo(NCURSES_SP_ARGx row, first = j);
651 i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first);
653 * Always return 1 for the next GoTo() after a PutRange() if we found
654 * identical characters at end of interval
656 return (same == 0 ? i : 1);
658 return EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1);
661 /* leave unbracketed here so 'indent' works */
662 #define MARK_NOCHANGE(win,row) \
663 win->_line[row].firstchar = _NOCHANGE; \
664 win->_line[row].lastchar = _NOCHANGE; \
665 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row)
668 TINFO_DOUPDATE(NCURSES_SP_DCL0)
673 struct tms before, after;
674 #endif /* USE_TRACE_TIMES */
676 T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM));
683 * It is "legal" but unlikely that an application could assign a new
684 * value to one of the standard windows. Check for that possibility
685 * and try to recover.
687 * We do not allow applications to assign new values in the reentrant
690 #define SyncScreens(internal,exported) \
691 if (internal == 0) internal = exported; \
692 if (internal != exported) exported = internal
694 SyncScreens(CurScreen(SP_PARM), curscr);
695 SyncScreens(NewScreen(SP_PARM), newscr);
696 SyncScreens(StdScreen(SP_PARM), stdscr);
699 if (CurScreen(SP_PARM) == 0
700 || NewScreen(SP_PARM) == 0
701 || StdScreen(SP_PARM) == 0)
705 if (USE_TRACEF(TRACE_UPDATE)) {
706 if (CurScreen(SP_PARM)->_clear)
707 _tracef("curscr is clear");
709 _tracedump("curscr", CurScreen(SP_PARM));
710 _tracedump("newscr", NewScreen(SP_PARM));
711 _nc_unlock_global(tracef);
715 _nc_signal_handler(FALSE);
717 if (SP_PARM->_fifohold)
718 SP_PARM->_fifohold--;
721 if (SP_PARM->_endwin || _nc_handle_sigwinch(SP_PARM)) {
723 * This is a transparent extension: XSI does not address it,
724 * and applications need not know that ncurses can do it.
726 * Check if the terminal size has changed while curses was off
727 * (this can happen in an xterm, for example), and resize the
728 * ncurses data structures accordingly.
730 _nc_update_screensize(SP_PARM);
734 if (SP_PARM->_endwin) {
736 T(("coming back from shell mode"));
737 NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG);
739 NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG);
740 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
741 SP_PARM->_mouse_resume(SP_PARM);
743 SP_PARM->_endwin = FALSE;
746 /* zero the metering machinery */
748 (void) times(&before);
749 #endif /* USE_TRACE_TIMES */
752 * This is the support for magic-cookie terminals. The theory: we scan
753 * the virtual screen looking for attribute turnons. Where we find one,
754 * check to make sure it's realizable by seeing if the required number of
755 * un-attributed blanks are present before and after the attributed range;
756 * try to shift the range boundaries over blanks (not changing the screen
757 * display) so this becomes true. If it is, shift the beginning attribute
758 * change appropriately (the end one, if we've gotten this far, is
759 * guaranteed room for its cookie). If not, nuke the added attributes out
763 if (magic_cookie_glitch > 0) {
765 attr_t rattr = A_NORMAL;
767 for (i = 0; i < screen_lines(SP_PARM); i++) {
768 for (j = 0; j < screen_columns(SP_PARM); j++) {
770 NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text;
771 attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers;
772 attr_t turnon = thisattr & ~rattr;
774 /* is an attribute turned on here? */
780 TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr)));
781 TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon)));
784 * If the attribute change location is a blank with a "safe"
785 * attribute, undo the attribute turnon. This may ensure
786 * there's enough room to set the attribute before the first
787 * non-blank in the run.
789 #define SAFE(scr,a) (!((a) & (scr)->_xmc_triggers))
790 if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) {
791 RemAttr(thisline[j], turnon);
795 /* check that there's enough room at start of span */
796 for (k = 1; k <= magic_cookie_glitch; k++) {
798 || !ISBLANK(thisline[j - k])
799 || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) {
801 TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s",
803 (ISBLANK(thisline[j - k])
806 (SAFE(SP_PARM, AttrOf(thisline[j - k]))
813 bool end_onscreen = FALSE;
816 /* find end of span, if it's onscreen */
817 for (m = i; m < screen_lines(SP_PARM); m++) {
818 for (; n < screen_columns(SP_PARM); n++) {
820 AttrOf(NewScreen(SP_PARM)->_line[m].text[n]);
821 if ((testattr & SP_PARM->_xmc_triggers) == rattr) {
824 ("Range attributed with %s ends at (%d, %d)",
825 _traceattr(turnon), m, n));
832 ("Range attributed with %s ends offscreen",
833 _traceattr(turnon)));
837 NCURSES_CH_T *lastline =
838 NewScreen(SP_PARM)->_line[m].text;
841 * If there are safely-attributed blanks at the end of
842 * the range, shorten the range. This will help ensure
843 * that there is enough room at end of span.
846 && ISBLANK(lastline[n])
847 && SAFE(SP_PARM, AttrOf(lastline[n]))) {
848 RemAttr(lastline[n--], turnon);
851 /* check that there's enough room at end of span */
852 for (k = 1; k <= magic_cookie_glitch; k++) {
853 if (n + k >= screen_columns(SP_PARM)
854 || !ISBLANK(lastline[n + k])
855 || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) {
858 ("No room at end in %d,%d%s%s",
860 (ISBLANK(lastline[n + k])
863 (SAFE(SP_PARM, AttrOf(lastline[n + k]))
876 ("Clearing %s beginning at (%d, %d)",
877 _traceattr(turnon), i, j));
879 /* turn off new attributes over span */
880 for (p = i; p < screen_lines(SP_PARM); p++) {
881 for (; q < screen_columns(SP_PARM); q++) {
882 attr_t testattr = AttrOf(newscr->_line[p].text[q]);
883 if ((testattr & SP_PARM->_xmc_triggers) == rattr)
885 RemAttr(NewScreen(SP_PARM)->_line[p].text[q], turnon);
892 ("Cookie space for %s found before (%d, %d)",
893 _traceattr(turnon), i, j));
896 * Back up the start of range so there's room for cookies
897 * before the first nonblank character.
899 for (k = 1; k <= magic_cookie_glitch; k++)
900 AddAttr(thisline[j - k], turnon);
908 /* show altered highlights after magic-cookie check */
909 if (USE_TRACEF(TRACE_UPDATE)) {
910 _tracef("After magic-cookie check...");
911 _tracedump("newscr", NewScreen(SP_PARM));
912 _nc_unlock_global(tracef);
916 #endif /* USE_XMC_SUPPORT */
919 if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */
920 ClrUpdate(NCURSES_SP_ARG);
921 CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */
922 NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */
924 int changedlines = CHECK_INTERVAL;
926 if (check_pending(NCURSES_SP_ARG))
929 nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1);
931 if (SP_PARM->_scrolling) {
932 NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG);
935 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
937 TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty));
938 for (i = 0; i < nonempty; i++) {
940 * Here is our line-breakout optimization.
942 if (changedlines == CHECK_INTERVAL) {
943 if (check_pending(NCURSES_SP_ARG))
949 * newscr->line[i].firstchar is normally set
950 * by wnoutrefresh. curscr->line[i].firstchar
951 * is normally set by _nc_scroll_window in the
952 * vertical-movement optimization code,
954 if (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE
955 || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) {
956 TransformLine(NCURSES_SP_ARGx i);
960 /* mark line changed successfully */
961 if (i <= NewScreen(SP_PARM)->_maxy) {
962 MARK_NOCHANGE(NewScreen(SP_PARM), i);
964 if (i <= CurScreen(SP_PARM)->_maxy) {
965 MARK_NOCHANGE(CurScreen(SP_PARM), i);
970 /* put everything back in sync */
971 for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) {
972 MARK_NOCHANGE(NewScreen(SP_PARM), i);
974 for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) {
975 MARK_NOCHANGE(CurScreen(SP_PARM), i);
978 if (!NewScreen(SP_PARM)->_leaveok) {
979 CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx;
980 CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury;
982 GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx);
987 * We would like to keep the physical screen in normal mode in case we get
988 * other processes writing to the screen. This goal cannot be met for
989 * magic cookies since it interferes with attributes that may propagate
990 * past the current position.
993 if (magic_cookie_glitch != 0)
995 UpdateAttrs(SP_PARM, normal);
997 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
998 WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM));
1001 (void) times(&after);
1003 ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time",
1005 (long) (after.tms_stime - before.tms_stime),
1006 (long) (after.tms_utime - before.tms_utime)));
1007 #endif /* USE_TRACE_TIMES */
1009 _nc_signal_handler(TRUE);
1014 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
1018 return TINFO_DOUPDATE(CURRENT_SCREEN);
1025 * Returns the attributed character that corresponds to the "cleared"
1026 * screen. If the terminal has the back-color-erase feature, this will be
1027 * colored according to the wbkgd() call.
1029 * We treat 'curscr' specially because it isn't supposed to be set directly
1030 * in the wbkgd() call. Assume 'stdscr' for this case.
1032 #define BCE_ATTRS (A_NORMAL|A_COLOR)
1033 #define BCE_BKGD(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd)
1035 static NCURSES_INLINE NCURSES_CH_T
1036 ClrBlank(NCURSES_SP_DCLx WINDOW *win)
1038 NCURSES_CH_T blank = blankchar;
1039 if (back_color_erase)
1040 AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
1047 ** Update by clearing and redrawing the entire screen.
1052 ClrUpdate(NCURSES_SP_DCL0)
1054 TR(TRACE_UPDATE, (T_CALLED("ClrUpdate")));
1057 NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM));
1058 int nonempty = min(screen_lines(SP_PARM),
1059 NewScreen(SP_PARM)->_maxy + 1);
1061 ClearScreen(NCURSES_SP_ARGx blank);
1063 TR(TRACE_UPDATE, ("updating screen from scratch"));
1065 nonempty = ClrBottom(NCURSES_SP_ARGx nonempty);
1067 for (i = 0; i < nonempty; i++)
1068 TransformLine(NCURSES_SP_ARGx i);
1070 TR(TRACE_UPDATE, (T_RETURN("")));
1076 ** Clear to end of current line, starting at the cursor position
1080 ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear)
1084 if (CurScreen(SP_PARM) != 0
1085 && SP_PARM->_cursrow >= 0) {
1086 for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) {
1089 &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]);
1091 if (!CharEq(*cp, blank)) {
1100 UpdateAttrs(SP_PARM, blank);
1101 TPUTS_TRACE("clr_eol");
1102 if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) {
1103 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx clr_eol);
1105 int count = (screen_columns(SP_PARM) - SP_PARM->_curscol);
1107 PutChar(NCURSES_SP_ARGx CHREF(blank));
1115 ** Clear to end of screen, starting at the cursor position
1119 ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank)
1123 row = SP_PARM->_cursrow;
1124 col = SP_PARM->_curscol;
1126 UpdateAttrs(SP_PARM, blank);
1127 TPUTS_TRACE("clr_eos");
1128 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1130 screen_lines(SP_PARM) - row,
1131 NCURSES_SP_NAME(_nc_outch));
1133 while (col < screen_columns(SP_PARM))
1134 CurScreen(SP_PARM)->_line[row].text[col++] = blank;
1136 for (row++; row < screen_lines(SP_PARM); row++) {
1137 for (col = 0; col < screen_columns(SP_PARM); col++)
1138 CurScreen(SP_PARM)->_line[row].text[col] = blank;
1145 * Test if clearing the end of the screen would satisfy part of the
1146 * screen-update. Do this by scanning backwards through the lines in the
1147 * screen, checking if each is blank, and one or more are changed.
1150 ClrBottom(NCURSES_SP_DCLx int total)
1155 int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1);
1156 NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1];
1159 if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1161 for (row = total - 1; row >= 0; row--) {
1162 for (col = 0, ok = TRUE; ok && col < last; col++) {
1163 ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank));
1168 for (col = 0; ok && col < last; col++) {
1169 ok = (CharEq(CurScreen(SP_PARM)->_line[row].text[col], blank));
1175 /* don't use clr_eos for just one line if clr_eol available */
1177 GoTo(NCURSES_SP_ARGx top, 0);
1178 ClrToEOS(NCURSES_SP_ARGx blank);
1179 if (SP_PARM->oldhash && SP_PARM->newhash) {
1180 for (row = top; row < screen_lines(SP_PARM); row++)
1181 SP_PARM->oldhash[row] = SP_PARM->newhash[row];
1189 #if USE_WIDEC_SUPPORT
1190 #define check_xmc_transition(sp, a, b) \
1191 ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0)
1192 #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b))
1194 #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0)
1197 #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c]
1198 #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a)
1199 #endif /* USE_XMC_SUPPORT */
1202 ** TransformLine(lineno)
1204 ** Transform the given line in curscr to the one in newscr, using
1205 ** Insert/Delete Character if idcok && has_ic().
1207 ** firstChar = position of first different character in line
1208 ** oLastChar = position of last different character in old line
1209 ** nLastChar = position of last different character in new line
1211 ** move to firstChar
1212 ** overwrite chars up to min(oLastChar, nLastChar)
1213 ** if oLastChar < nLastChar
1214 ** insert newLine[oLastChar+1..nLastChar]
1216 ** delete oLastChar - nLastChar spaces
1220 TransformLine(NCURSES_SP_DCLx int const lineno)
1222 int firstChar, oLastChar, nLastChar;
1223 NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text;
1224 NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text;
1226 bool attrchanged = FALSE;
1228 TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno));
1230 /* copy new hash value to old one */
1231 if (SP_PARM->oldhash && SP_PARM->newhash)
1232 SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno];
1235 * If we have colors, there is the possibility of having two color pairs
1236 * that display as the same colors. For instance, Lynx does this. Check
1237 * for this case, and update the old line with the new line's colors when
1238 * they are equivalent.
1240 if (SP_PARM->_coloron) {
1244 for (n = 0; n < screen_columns(SP_PARM); n++) {
1245 if (!CharEq(newLine[n], oldLine[n])) {
1246 oldPair = GetPair(oldLine[n]);
1247 newPair = GetPair(newLine[n]);
1248 if (oldPair != newPair
1249 && unColor(oldLine[n]) == unColor(newLine[n])) {
1250 if (oldPair < SP_PARM->_pair_limit
1251 && newPair < SP_PARM->_pair_limit
1252 && (SP_PARM->_color_pairs[oldPair] ==
1253 SP_PARM->_color_pairs[newPair])) {
1254 SetPair(oldLine[n], GetPair(newLine[n]));
1261 if (ceol_standout_glitch && clr_eol) {
1263 while (firstChar < screen_columns(SP_PARM)) {
1264 if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) {
1274 if (attrchanged) { /* we may have to disregard the whole line */
1275 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1276 ClrToEOL(NCURSES_SP_ARGx
1277 ClrBlank(NCURSES_SP_ARGx
1278 CurScreen(SP_PARM)), FALSE);
1279 PutRange(NCURSES_SP_ARGx
1280 oldLine, newLine, lineno, 0,
1281 screen_columns(SP_PARM) - 1);
1285 * This is a very simple loop to paint characters which may have the
1286 * magic cookie glitch embedded. It doesn't know much about video
1287 * attributes which are continued from one line to the next. It
1288 * assumes that we have filtered out requests for attribute changes
1289 * that do not get mapped to blank positions.
1291 * FIXME: we are not keeping track of where we put the cookies, so this
1292 * will work properly only once, since we may overwrite a cookie in a
1293 * following operation.
1295 } else if (magic_cookie_glitch > 0) {
1296 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1297 for (n = 0; n < screen_columns(SP_PARM); n++) {
1298 int m = n + magic_cookie_glitch;
1300 /* check for turn-on:
1301 * If we are writing an attributed blank, where the
1302 * previous cell is not attributed.
1304 if (ISBLANK(newLine[n])
1306 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n]))
1309 && xmc_turn_on(SP_PARM,
1310 xmc_new(SP_PARM, lineno - 1,
1311 screen_columns(SP_PARM) - 1),
1316 PutChar(NCURSES_SP_ARGx CHREF(newLine[n]));
1318 /* check for turn-off:
1319 * If we are writing an attributed non-blank, where the
1320 * next cell is blank, and not attributed.
1322 if (!ISBLANK(newLine[n])
1323 && ((n + 1 < screen_columns(SP_PARM)
1324 && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1]))
1325 || (n + 1 >= screen_columns(SP_PARM)
1326 && lineno + 1 < screen_lines(SP_PARM)
1327 && xmc_turn_off(SP_PARM,
1329 xmc_new(SP_PARM, lineno + 1, 0))))) {
1338 /* it may be cheap to clear leading whitespace with clr_bol */
1340 if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1341 int oFirstChar, nFirstChar;
1343 for (oFirstChar = 0;
1344 oFirstChar < screen_columns(SP_PARM);
1346 if (!CharEq(oldLine[oFirstChar], blank))
1348 for (nFirstChar = 0;
1349 nFirstChar < screen_columns(SP_PARM);
1351 if (!CharEq(newLine[nFirstChar], blank))
1354 if (nFirstChar == oFirstChar) {
1355 firstChar = nFirstChar;
1356 /* find the first differing character */
1357 while (firstChar < screen_columns(SP_PARM)
1358 && CharEq(newLine[firstChar], oldLine[firstChar]))
1360 } else if (oFirstChar > nFirstChar) {
1361 firstChar = nFirstChar;
1362 } else { /* oFirstChar < nFirstChar */
1363 firstChar = oFirstChar;
1364 if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) {
1365 if (nFirstChar >= screen_columns(SP_PARM)
1366 && SP_PARM->_el_cost <= SP_PARM->_el1_cost) {
1367 GoTo(NCURSES_SP_ARGx lineno, 0);
1368 UpdateAttrs(SP_PARM, blank);
1369 TPUTS_TRACE("clr_eol");
1370 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx clr_eol);
1372 GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1);
1373 UpdateAttrs(SP_PARM, blank);
1374 TPUTS_TRACE("clr_bol");
1375 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx clr_bol);
1378 while (firstChar < nFirstChar)
1379 oldLine[firstChar++] = blank;
1383 /* find the first differing character */
1384 while (firstChar < screen_columns(SP_PARM)
1385 && CharEq(newLine[firstChar], oldLine[firstChar]))
1388 /* if there wasn't one, we're done */
1389 if (firstChar >= screen_columns(SP_PARM)) {
1390 TR(TRACE_UPDATE, (T_RETURN("")));
1394 blank = newLine[screen_columns(SP_PARM) - 1];
1396 if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) {
1397 /* find the last differing character */
1398 nLastChar = screen_columns(SP_PARM) - 1;
1400 while (nLastChar > firstChar
1401 && CharEq(newLine[nLastChar], oldLine[nLastChar]))
1404 if (nLastChar >= firstChar) {
1405 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1406 PutRange(NCURSES_SP_ARGx
1412 memcpy(oldLine + firstChar,
1413 newLine + firstChar,
1414 (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T));
1416 TR(TRACE_UPDATE, (T_RETURN("")));
1420 /* find last non-blank character on old line */
1421 oLastChar = screen_columns(SP_PARM) - 1;
1422 while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank))
1425 /* find last non-blank character on new line */
1426 nLastChar = screen_columns(SP_PARM) - 1;
1427 while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank))
1430 if ((nLastChar == firstChar)
1431 && (SP_PARM->_el_cost < (oLastChar - nLastChar))) {
1432 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1433 if (!CharEq(newLine[firstChar], blank))
1434 PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar]));
1435 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1436 } else if ((nLastChar != oLastChar)
1437 && (!CharEq(newLine[nLastChar], oldLine[oLastChar])
1438 || !(SP_PARM->_nc_sp_idcok
1439 && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) {
1440 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1441 if ((oLastChar - nLastChar) > SP_PARM->_el_cost) {
1442 if (PutRange(NCURSES_SP_ARGx
1448 GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1);
1450 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1452 n = max(nLastChar, oLastChar);
1453 PutRange(NCURSES_SP_ARGx
1461 int nLastNonblank = nLastChar;
1462 int oLastNonblank = oLastChar;
1464 /* find the last characters that really differ */
1465 /* can be -1 if no characters differ */
1466 while (CharEq(newLine[nLastChar], oldLine[oLastChar])) {
1467 /* don't split a wide char */
1468 if (isWidecExt(newLine[nLastChar]) &&
1469 !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1]))
1473 if (nLastChar == -1 || oLastChar == -1)
1477 n = min(oLastChar, nLastChar);
1478 if (n >= firstChar) {
1479 GoTo(NCURSES_SP_ARGx lineno, firstChar);
1480 PutRange(NCURSES_SP_ARGx
1488 if (oLastChar < nLastChar) {
1489 int m = max(nLastNonblank, oLastNonblank);
1490 #if USE_WIDEC_SUPPORT
1491 while (isWidecExt(newLine[n + 1]) && n) {
1496 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1497 if ((nLastChar < nLastNonblank)
1498 || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) {
1499 PutRange(NCURSES_SP_ARGx
1506 InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar);
1508 } else if (oLastChar > nLastChar) {
1509 GoTo(NCURSES_SP_ARGx lineno, n + 1);
1510 if (DelCharCost(SP_PARM, oLastChar - nLastChar)
1511 > SP_PARM->_el_cost + nLastNonblank - (n + 1)) {
1512 if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno,
1513 n + 1, nLastNonblank))
1514 GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1);
1515 ClrToEOL(NCURSES_SP_ARGx blank, FALSE);
1518 * The delete-char sequence will
1519 * effectively shift in blanks from the
1520 * right margin of the screen. Ensure
1521 * that they are the right color by
1522 * setting the video attributes from
1523 * the last character on the row.
1525 UpdateAttrs(SP_PARM, blank);
1526 DelChar(NCURSES_SP_ARGx oLastChar - nLastChar);
1532 /* update the code's internal representation */
1533 if (screen_columns(SP_PARM) > firstChar)
1534 memcpy(oldLine + firstChar,
1535 newLine + firstChar,
1536 (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T));
1537 TR(TRACE_UPDATE, (T_RETURN("")));
1542 ** ClearScreen(blank)
1544 ** Clear the physical screen and put cursor at home
1549 ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank)
1552 bool fast_clear = (clear_screen || clr_eos || clr_eol);
1554 TR(TRACE_UPDATE, ("ClearScreen() called"));
1556 #if NCURSES_EXT_FUNCS
1557 if (SP_PARM->_coloron
1558 && !SP_PARM->_default_color) {
1559 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
1560 (short) GET_SCREEN_PAIR(SP_PARM),
1563 NCURSES_SP_NAME(_nc_outch));
1564 if (!back_color_erase) {
1572 UpdateAttrs(SP_PARM, blank);
1573 TPUTS_TRACE("clear_screen");
1574 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx clear_screen);
1575 SP_PARM->_cursrow = SP_PARM->_curscol = 0;
1576 position_check(SP_PARM,
1580 } else if (clr_eos) {
1581 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1582 GoTo(NCURSES_SP_ARGx 0, 0);
1583 UpdateAttrs(SP_PARM, blank);
1584 TPUTS_TRACE("clr_eos");
1585 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1587 screen_lines(SP_PARM),
1588 NCURSES_SP_NAME(_nc_outch));
1589 } else if (clr_eol) {
1590 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1591 UpdateAttrs(SP_PARM, blank);
1592 for (i = 0; i < screen_lines(SP_PARM); i++) {
1593 GoTo(NCURSES_SP_ARGx i, 0);
1594 TPUTS_TRACE("clr_eol");
1595 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx clr_eol);
1597 GoTo(NCURSES_SP_ARGx 0, 0);
1600 UpdateAttrs(SP_PARM, blank);
1601 for (i = 0; i < screen_lines(SP_PARM); i++) {
1602 GoTo(NCURSES_SP_ARGx i, 0);
1603 for (j = 0; j < screen_columns(SP_PARM); j++)
1604 PutChar(NCURSES_SP_ARGx CHREF(blank));
1606 GoTo(NCURSES_SP_ARGx 0, 0);
1609 for (i = 0; i < screen_lines(SP_PARM); i++) {
1610 for (j = 0; j < screen_columns(SP_PARM); j++)
1611 CurScreen(SP_PARM)->_line[i].text[j] = blank;
1614 TR(TRACE_UPDATE, ("screen cleared"));
1618 ** InsStr(line, count)
1620 ** Insert the count characters pointed to by line.
1625 InsStr(NCURSES_SP_DCLx NCURSES_CH_T * line, int count)
1627 TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called",
1629 (void *) line, count));
1631 /* Prefer parm_ich as it has the smallest cost - no need to shift
1632 * the whole line on each character. */
1633 /* The order must match that of InsCharCost. */
1635 TPUTS_TRACE("parm_ich");
1636 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1637 TPARM_1(parm_ich, count),
1639 NCURSES_SP_NAME(_nc_outch));
1641 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1645 } else if (enter_insert_mode && exit_insert_mode) {
1646 TPUTS_TRACE("enter_insert_mode");
1647 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx enter_insert_mode);
1649 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1650 if (insert_padding) {
1651 TPUTS_TRACE("insert_padding");
1652 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_padding);
1657 TPUTS_TRACE("exit_insert_mode");
1658 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_insert_mode);
1661 TPUTS_TRACE("insert_character");
1662 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_character);
1663 PutAttrChar(NCURSES_SP_ARGx CHREF(*line));
1664 if (insert_padding) {
1665 TPUTS_TRACE("insert_padding");
1666 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_padding);
1672 position_check(SP_PARM, SP_PARM->_cursrow, SP_PARM->_curscol, "InsStr");
1678 ** Delete count characters at current position
1683 DelChar(NCURSES_SP_DCLx int count)
1687 TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)",
1688 (void *) SP_PARM, count,
1689 (long) NewScreen(SP_PARM)->_cury,
1690 (long) NewScreen(SP_PARM)->_curx));
1693 TPUTS_TRACE("parm_dch");
1694 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1695 TPARM_1(parm_dch, count),
1697 NCURSES_SP_NAME(_nc_outch));
1699 for (n = 0; n < count; n++) {
1700 TPUTS_TRACE("delete_character");
1701 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx delete_character);
1707 * Physical-scrolling support
1709 * This code was adapted from Keith Bostic's hardware scrolling
1710 * support for 4.4BSD curses. I (esr) translated it to use terminfo
1711 * capabilities, narrowed the call interface slightly, and cleaned
1712 * up some convoluted tests. I also added support for the memory_above
1713 * memory_below, and non_dest_scroll_region capabilities.
1715 * For this code to work, we must have either
1716 * change_scroll_region and scroll forward/reverse commands, or
1717 * insert and delete line capabilities.
1718 * When the scrolling region has been set, the cursor has to
1719 * be at the last line of the region to make the scroll up
1720 * happen, or on the first line of region to scroll down.
1722 * This code makes one aesthetic decision in the opposite way from
1723 * BSD curses. BSD curses preferred pairs of il/dl operations
1724 * over scrolls, allegedly because il/dl looked faster. We, on
1725 * the other hand, prefer scrolls because (a) they're just as fast
1726 * on many terminals and (b) using them avoids bouncing an
1727 * unchanged bottom section of the screen up and down, which is
1730 * (lav): added more cases, used dl/il when bot==maxy and in csr case.
1732 * I used assumption that capabilities il/il1/dl/dl1 work inside
1733 * changed scroll region not shifting screen contents outside of it.
1734 * If there are any terminals behaving different way, it would be
1735 * necessary to add some conditions to scroll_csr_forward/backward.
1738 /* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */
1740 scroll_csr_forward(NCURSES_SP_DCLx
1750 if (n == 1 && scroll_forward && top == miny && bot == maxy) {
1751 GoTo(NCURSES_SP_ARGx bot, 0);
1752 UpdateAttrs(SP_PARM, blank);
1753 TPUTS_TRACE("scroll_forward");
1754 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx scroll_forward);
1755 } else if (n == 1 && delete_line && bot == maxy) {
1756 GoTo(NCURSES_SP_ARGx top, 0);
1757 UpdateAttrs(SP_PARM, blank);
1758 TPUTS_TRACE("delete_line");
1759 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx delete_line);
1760 } else if (parm_index && top == miny && bot == maxy) {
1761 GoTo(NCURSES_SP_ARGx bot, 0);
1762 UpdateAttrs(SP_PARM, blank);
1763 TPUTS_TRACE("parm_index");
1764 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1765 TPARM_2(parm_index, n, 0),
1767 NCURSES_SP_NAME(_nc_outch));
1768 } else if (parm_delete_line && bot == maxy) {
1769 GoTo(NCURSES_SP_ARGx top, 0);
1770 UpdateAttrs(SP_PARM, blank);
1771 TPUTS_TRACE("parm_delete_line");
1772 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1773 TPARM_2(parm_delete_line, n, 0),
1775 NCURSES_SP_NAME(_nc_outch));
1776 } else if (scroll_forward && top == miny && bot == maxy) {
1777 GoTo(NCURSES_SP_ARGx bot, 0);
1778 UpdateAttrs(SP_PARM, blank);
1779 for (i = 0; i < n; i++) {
1780 TPUTS_TRACE("scroll_forward");
1781 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx scroll_forward);
1783 } else if (delete_line && bot == maxy) {
1784 GoTo(NCURSES_SP_ARGx top, 0);
1785 UpdateAttrs(SP_PARM, blank);
1786 for (i = 0; i < n; i++) {
1787 TPUTS_TRACE("delete_line");
1788 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx delete_line);
1793 #if NCURSES_EXT_FUNCS
1794 if (FILL_BCE(SP_PARM)) {
1796 for (i = 0; i < n; i++) {
1797 GoTo(NCURSES_SP_ARGx bot - i, 0);
1798 for (j = 0; j < screen_columns(SP_PARM); j++)
1799 PutChar(NCURSES_SP_ARGx CHREF(blank));
1806 /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */
1809 scroll_csr_backward(NCURSES_SP_DCLx
1819 if (n == 1 && scroll_reverse && top == miny && bot == maxy) {
1820 GoTo(NCURSES_SP_ARGx top, 0);
1821 UpdateAttrs(SP_PARM, blank);
1822 TPUTS_TRACE("scroll_reverse");
1823 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx scroll_reverse);
1824 } else if (n == 1 && insert_line && bot == maxy) {
1825 GoTo(NCURSES_SP_ARGx top, 0);
1826 UpdateAttrs(SP_PARM, blank);
1827 TPUTS_TRACE("insert_line");
1828 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_line);
1829 } else if (parm_rindex && top == miny && bot == maxy) {
1830 GoTo(NCURSES_SP_ARGx top, 0);
1831 UpdateAttrs(SP_PARM, blank);
1832 TPUTS_TRACE("parm_rindex");
1833 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1834 TPARM_2(parm_rindex, n, 0),
1836 NCURSES_SP_NAME(_nc_outch));
1837 } else if (parm_insert_line && bot == maxy) {
1838 GoTo(NCURSES_SP_ARGx top, 0);
1839 UpdateAttrs(SP_PARM, blank);
1840 TPUTS_TRACE("parm_insert_line");
1841 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1842 TPARM_2(parm_insert_line, n, 0),
1844 NCURSES_SP_NAME(_nc_outch));
1845 } else if (scroll_reverse && top == miny && bot == maxy) {
1846 GoTo(NCURSES_SP_ARGx top, 0);
1847 UpdateAttrs(SP_PARM, blank);
1848 for (i = 0; i < n; i++) {
1849 TPUTS_TRACE("scroll_reverse");
1850 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx scroll_reverse);
1852 } else if (insert_line && bot == maxy) {
1853 GoTo(NCURSES_SP_ARGx top, 0);
1854 UpdateAttrs(SP_PARM, blank);
1855 for (i = 0; i < n; i++) {
1856 TPUTS_TRACE("insert_line");
1857 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_line);
1862 #if NCURSES_EXT_FUNCS
1863 if (FILL_BCE(SP_PARM)) {
1865 for (i = 0; i < n; i++) {
1866 GoTo(NCURSES_SP_ARGx top + i, 0);
1867 for (j = 0; j < screen_columns(SP_PARM); j++)
1868 PutChar(NCURSES_SP_ARGx CHREF(blank));
1875 /* scroll by using delete_line at del and insert_line at ins */
1878 scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank)
1882 if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line)))
1885 GoTo(NCURSES_SP_ARGx del, 0);
1886 UpdateAttrs(SP_PARM, blank);
1887 if (n == 1 && delete_line) {
1888 TPUTS_TRACE("delete_line");
1889 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx delete_line);
1890 } else if (parm_delete_line) {
1891 TPUTS_TRACE("parm_delete_line");
1892 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1893 TPARM_2(parm_delete_line, n, 0),
1895 NCURSES_SP_NAME(_nc_outch));
1896 } else { /* if (delete_line) */
1897 for (i = 0; i < n; i++) {
1898 TPUTS_TRACE("delete_line");
1899 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx delete_line);
1903 GoTo(NCURSES_SP_ARGx ins, 0);
1904 UpdateAttrs(SP_PARM, blank);
1905 if (n == 1 && insert_line) {
1906 TPUTS_TRACE("insert_line");
1907 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx insert_line);
1908 } else if (parm_insert_line) {
1909 TPUTS_TRACE("parm_insert_line");
1910 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1911 TPARM_2(parm_insert_line, n, 0),
1913 NCURSES_SP_NAME(_nc_outch));
1914 } else { /* if (insert_line) */
1915 for (i = 0; i < n; i++) {
1916 TPUTS_TRACE("insert_line");
1917 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx 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 TPUTS_TRACE("save_cursor");
1975 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx save_cursor);
1977 TPUTS_TRACE("change_scroll_region");
1978 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
1979 TPARM_2(change_scroll_region, top, bot));
1981 TPUTS_TRACE("restore_cursor");
1982 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx restore_cursor);
1984 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1987 res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank);
1989 TPUTS_TRACE("change_scroll_region");
1990 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
1991 TPARM_2(change_scroll_region, 0, maxy));
1992 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
1995 if (res == ERR && SP_PARM->_nc_sp_idlok)
1996 res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank);
1999 * Clear the newly shifted-in text.
2002 && (non_dest_scroll_region || (memory_below && bot == maxy))) {
2003 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2004 if (bot == maxy && clr_eos) {
2005 GoTo(NCURSES_SP_ARGx bot - n + 1, 0);
2006 ClrToEOS(NCURSES_SP_ARGx blank2);
2008 for (i = 0; i < n; i++) {
2009 GoTo(NCURSES_SP_ARGx bot - i, 0);
2010 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2015 } else { /* (n < 0) - scroll down (backward) */
2016 res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank);
2018 if (res == ERR && change_scroll_region) {
2020 && (SP_PARM->_cursrow == top ||
2021 SP_PARM->_cursrow == top - 1)
2022 && save_cursor && restore_cursor) {
2023 cursor_saved = TRUE;
2024 TPUTS_TRACE("save_cursor");
2025 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx save_cursor);
2027 TPUTS_TRACE("change_scroll_region");
2028 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
2029 TPARM_2(change_scroll_region, top, bot));
2031 TPUTS_TRACE("restore_cursor");
2032 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx restore_cursor);
2034 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2037 res = scroll_csr_backward(NCURSES_SP_ARGx
2038 -n, top, bot, top, bot, blank);
2040 TPUTS_TRACE("change_scroll_region");
2041 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
2042 TPARM_2(change_scroll_region, 0, maxy));
2043 SP_PARM->_cursrow = SP_PARM->_curscol = -1;
2046 if (res == ERR && SP_PARM->_nc_sp_idlok)
2047 res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank);
2050 * Clear the newly shifted-in text.
2053 && (non_dest_scroll_region || (memory_above && top == 0))) {
2054 static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT);
2055 for (i = 0; i < -n; i++) {
2056 GoTo(NCURSES_SP_ARGx i + top, 0);
2057 ClrToEOL(NCURSES_SP_ARGx blank2, FALSE);
2065 _nc_scroll_window(CurScreen(SP_PARM), n,
2066 (NCURSES_SIZE_T) top,
2067 (NCURSES_SIZE_T) bot,
2070 /* shift hash values too - they can be reused */
2071 NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot);
2076 #if NCURSES_SP_FUNCS
2078 _nc_scrolln(int n, int top, int bot, int maxy)
2080 return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy);
2084 NCURSES_EXPORT(void)
2085 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0)
2089 /* make sure terminal is in a sane known state */
2090 SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL);
2091 NewScreen(SP_PARM)->_clear = TRUE;
2093 /* reset color pairs and definitions */
2094 if (SP_PARM->_coloron || SP_PARM->_color_defs)
2095 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2097 /* restore user-defined colors, if any */
2098 if (SP_PARM->_color_defs < 0) {
2100 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
2101 for (n = 0; n < SP_PARM->_color_defs; ++n) {
2102 if (SP_PARM->_color_table[n].init) {
2103 NCURSES_SP_NAME(init_color) (NCURSES_SP_ARGx
2105 SP_PARM->_color_table[n].r,
2106 SP_PARM->_color_table[n].g,
2107 SP_PARM->_color_table[n].b);
2112 if (exit_attribute_mode)
2113 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_attribute_mode);
2115 /* turn off attributes */
2116 if (exit_alt_charset_mode)
2117 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_alt_charset_mode);
2118 if (exit_standout_mode)
2119 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_standout_mode);
2120 if (exit_underline_mode)
2121 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_underline_mode);
2123 if (exit_insert_mode)
2124 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx exit_insert_mode);
2125 if (enter_am_mode && exit_am_mode)
2126 NCURSES_SP_NAME(putp) (NCURSES_SP_ARGx
2132 #if NCURSES_SP_FUNCS
2133 NCURSES_EXPORT(void)
2134 _nc_screen_resume(void)
2136 NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN);
2140 NCURSES_EXPORT(void)
2141 NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0)
2143 NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG);
2146 #if NCURSES_SP_FUNCS
2147 NCURSES_EXPORT(void)
2148 _nc_screen_init(void)
2150 NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN);
2154 /* wrap up screen handling */
2155 NCURSES_EXPORT(void)
2156 NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0)
2160 UpdateAttrs(SP_PARM, normal);
2161 #if NCURSES_EXT_FUNCS
2162 if (SP_PARM->_coloron
2163 && !SP_PARM->_default_color) {
2164 static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
2165 SP_PARM->_default_color = TRUE;
2166 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx
2170 NCURSES_SP_NAME(_nc_outch));
2171 SP_PARM->_default_color = FALSE;
2173 TINFO_MVCUR(NCURSES_SP_ARGx
2176 screen_lines(SP_PARM) - 1,
2179 ClrToEOL(NCURSES_SP_ARGx blank, TRUE);
2182 if (SP_PARM->_color_defs) {
2183 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG);
2188 #if NCURSES_SP_FUNCS
2189 NCURSES_EXPORT(void)
2190 _nc_screen_wrap(void)
2192 NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN);
2197 NCURSES_EXPORT(void)
2198 NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous)
2201 attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM)));
2205 SP_PARM->_curscol += magic_cookie_glitch;
2206 if (SP_PARM->_curscol >= SP_PARM->_columns)
2207 wrap_cursor(NCURSES_SP_ARG);
2208 TR(TRACE_UPDATE, ("bumped to %d,%d after cookie",
2209 SP_PARM->_cursrow, SP_PARM->_curscol));
2216 #if NCURSES_SP_FUNCS
2217 NCURSES_EXPORT(void)
2218 _nc_do_xmc_glitch(attr_t previous)
2220 NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous);
2224 #endif /* USE_XMC_SUPPORT */