diff options
Diffstat (limited to 'ncurses-5.2/ncurses/tty/tty_update.c')
| -rw-r--r-- | ncurses-5.2/ncurses/tty/tty_update.c | 1801 |
1 files changed, 0 insertions, 1801 deletions
diff --git a/ncurses-5.2/ncurses/tty/tty_update.c b/ncurses-5.2/ncurses/tty/tty_update.c deleted file mode 100644 index 0c2051e..0000000 --- a/ncurses-5.2/ncurses/tty/tty_update.c +++ /dev/null @@ -1,1801 +0,0 @@ -/**************************************************************************** - * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. * - * * - * Permission is hereby granted, free of charge, to any person obtaining a * - * copy of this software and associated documentation files (the * - * "Software"), to deal in the Software without restriction, including * - * without limitation the rights to use, copy, modify, merge, publish, * - * distribute, distribute with modifications, sublicense, and/or sell * - * copies of the Software, and to permit persons to whom the Software is * - * furnished to do so, subject to the following conditions: * - * * - * The above copyright notice and this permission notice shall be included * - * in all copies or substantial portions of the Software. * - * * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * - * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * - * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * - * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * - * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * - * * - * Except as contained in this notice, the name(s) of the above copyright * - * holders shall not be used in advertising or otherwise to promote the * - * sale, use or other dealings in this Software without prior written * - * authorization. * - ****************************************************************************/ - -/**************************************************************************** - * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * - * and: Eric S. Raymond <esr@snark.thyrsus.com> * - ****************************************************************************/ - -/*----------------------------------------------------------------- - * - * lib_doupdate.c - * - * The routine doupdate() and its dependents. Also _nc_outstr(), - * so all physical output is concentrated here (except _nc_outch() - * in lib_tputs.c). - * - *-----------------------------------------------------------------*/ - -#ifdef __BEOS__ -#include <OS.h> -#endif - -#include <curses.priv.h> - -#if defined(TRACE) && HAVE_SYS_TIMES_H && HAVE_TIMES -#define USE_TRACE_TIMES 1 -#else -#define USE_TRACE_TIMES 0 -#endif - -#if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT -#include <sys/time.h> -#endif - -#if USE_TRACE_TIMES -#include <sys/times.h> -#endif - -#if USE_FUNC_POLL -#elif HAVE_SELECT -#if HAVE_SYS_SELECT_H -#include <sys/select.h> -#endif -#endif - -#include <term.h> - -MODULE_ID("$Id$") - -/* - * This define controls the line-breakout optimization. Every once in a - * while during screen refresh, we want to check for input and abort the - * update if there's some waiting. CHECK_INTERVAL controls the number of - * changed lines to be emitted between input checks. - * - * Note: Input-check-and-abort is no longer done if the screen is being - * updated from scratch. This is a feature, not a bug. - */ -#define CHECK_INTERVAL 5 - -#define FILL_BCE() (SP->_coloron && !SP->_default_color && !back_color_erase) - -/* - * Enable checking to see if doupdate and friends are tracking the true - * cursor position correctly. NOTE: this is a debugging hack which will - * work ONLY on ANSI-compatible terminals! - */ -/* #define POSITION_DEBUG */ - -static inline chtype ClrBlank(WINDOW *win); -static int ClrBottom(int total); -static void ClearScreen(chtype blank); -static void ClrUpdate(void); -static void DelChar(int count); -static void InsStr(chtype * line, int count); -static void TransformLine(int const lineno); - -#ifdef POSITION_DEBUG -/**************************************************************************** - * - * Debugging code. Only works on ANSI-standard terminals. - * - ****************************************************************************/ - -static void -position_check(int expected_y, int expected_x, char *legend) -/* check to see if the real cursor position matches the virtual */ -{ - char buf[20]; - char *s; - int y, x; - - if (!_nc_tracing || (expected_y < 0 && expected_x < 0)) - return; - - _nc_flush(); - memset(buf, '\0', sizeof(buf)); - putp("\033[6n"); /* only works on ANSI-compatibles */ - _nc_flush(); - *(s = buf) = 0; - do { - int ask = sizeof(buf) - 1 - (s - buf); - int got = read(0, s, ask); - if (got == 0) - break; - s += got; - } while (strchr(buf, 'R') == 0); - _tracef("probe returned %s", _nc_visbuf(buf)); - - /* try to interpret as a position report */ - if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) { - _tracef("position probe failed in %s", legend); - } else { - if (expected_x < 0) - expected_x = x - 1; - if (expected_y < 0) - expected_y = y - 1; - if (y - 1 != expected_y || x - 1 != expected_x) { - beep(); - tputs(tparm("\033[%d;%dH", expected_y + 1, expected_x + 1), 1, _nc_outch); - _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s", - y - 1, x - 1, expected_y, expected_x, legend); - } else { - _tracef("position matches OK in %s", legend); - } - } -} -#else -#define position_check(expected_y, expected_x, legend) /* nothing */ -#endif /* POSITION_DEBUG */ - -/**************************************************************************** - * - * Optimized update code - * - ****************************************************************************/ - -static inline void -GoTo(int const row, int const col) -{ - chtype oldattr = SP->_current_attr; - - TR(TRACE_MOVE, ("GoTo(%d, %d) from (%d, %d)", - row, col, SP->_cursrow, SP->_curscol)); - - position_check(SP->_cursrow, SP->_curscol, "GoTo"); - - /* - * Force restore even if msgr is on when we're in an alternate - * character set -- these have a strong tendency to screw up the - * CR & LF used for local character motions! - */ - if ((oldattr & A_ALTCHARSET) - || (oldattr && !move_standout_mode)) { - TR(TRACE_CHARPUT, ("turning off (%#lx) %s before move", - oldattr, _traceattr(oldattr))); - vidattr(A_NORMAL); - } - - mvcur(SP->_cursrow, SP->_curscol, row, col); - SP->_cursrow = row; - SP->_curscol = col; - position_check(SP->_cursrow, SP->_curscol, "GoTo2"); -} - -static inline void -PutAttrChar(chtype ch) -{ - int data; - - if (tilde_glitch && (TextOf(ch) == '~')) - ch = ('`' | AttrOf(ch)); - - TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)", - _tracechtype(ch), - SP->_cursrow, SP->_curscol)); - UpdateAttrs(ch); - data = TextOf(ch); - if (SP->_outch != 0) { - SP->_outch(data); - } else { - putc(data, SP->_ofp); /* macro's fastest... */ -#ifdef TRACE - _nc_outchars++; -#endif /* TRACE */ - } - SP->_curscol++; - if (char_padding) { - TPUTS_TRACE("char_padding"); - putp(char_padding); - } -} - -static bool -check_pending(void) -/* check for pending input */ -{ - bool have_pending = FALSE; - - /* - * Only carry out this check when the flag is zero, otherwise we'll - * have the refreshing slow down drastically (or stop) if there's an - * unread character available. - */ - if (SP->_fifohold != 0) - return FALSE; - - if (SP->_checkfd >= 0) { -#if USE_FUNC_POLL - struct pollfd fds[1]; - fds[0].fd = SP->_checkfd; - fds[0].events = POLLIN; - if (poll(fds, 1, 0) > 0) { - have_pending = TRUE; - } -#elif defined(__BEOS__) - /* - * BeOS's select() is declared in socket.h, so the configure script does - * not see it. That's just as well, since that function works only for - * sockets. This (using snooze and ioctl) was distilled from Be's patch - * for ncurses which uses a separate thread to simulate select(). - * - * FIXME: the return values from the ioctl aren't very clear if we get - * interrupted. - */ - int n = 0; - int howmany = ioctl(0, 'ichr', &n); - if (howmany >= 0 && n > 0) { - have_pending = TRUE; - } -#elif HAVE_SELECT - fd_set fdset; - struct timeval ktimeout; - - ktimeout.tv_sec = - ktimeout.tv_usec = 0; - - FD_ZERO(&fdset); - FD_SET(SP->_checkfd, &fdset); - if (select(SP->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) { - have_pending = TRUE; - } -#endif - } - if (have_pending) { - SP->_fifohold = 5; - _nc_flush(); - } - return FALSE; -} - -/* - * No one supports recursive inline functions. However, gcc is quieter if we - * instantiate the recursive part separately. - */ -#if CC_HAS_INLINE_FUNCS -static void callPutChar(chtype const); -#else -#define callPutChar(ch) PutChar(ch) -#endif - -static inline void PutChar(chtype const ch); /* forward declaration */ - -/* put char at lower right corner */ -static void -PutCharLR(chtype const ch) -{ - if (!auto_right_margin) { - /* we can put the char directly */ - PutAttrChar(ch); - } else if (enter_am_mode && exit_am_mode) { - /* we can suppress automargin */ - TPUTS_TRACE("exit_am_mode"); - putp(exit_am_mode); - - PutAttrChar(ch); - SP->_curscol--; - position_check(SP->_cursrow, SP->_curscol, "exit_am_mode"); - - TPUTS_TRACE("enter_am_mode"); - putp(enter_am_mode); - } else if ((enter_insert_mode && exit_insert_mode) - || insert_character || parm_ich) { - GoTo(screen_lines - 1, screen_columns - 2); - callPutChar(ch); - GoTo(screen_lines - 1, screen_columns - 2); - InsStr(newscr->_line[screen_lines - 1].text + screen_columns - 2, 1); - } -} - -static void -wrap_cursor(void) -{ - if (eat_newline_glitch) { - /* - * xenl can manifest two different ways. The vt100 - * way is that, when you'd expect the cursor to wrap, - * it stays hung at the right margin (on top of the - * character just emitted) and doesn't wrap until the - * *next* graphic char is emitted. The c100 way is - * to ignore LF received just after an am wrap. - * - * An aggressive way to handle this would be to - * emit CR/LF after the char and then assume the wrap - * is done, you're on the first position of the next - * line, and the terminal out of its weird state. - * Here it's safe to just tell the code that the - * cursor is in hyperspace and let the next mvcur() - * call straighten things out. - */ - SP->_curscol = -1; - SP->_cursrow = -1; - } else if (auto_right_margin) { - SP->_curscol = 0; - SP->_cursrow++; - } else { - SP->_curscol--; - } - position_check(SP->_cursrow, SP->_curscol, "wrap_cursor"); -} - -static inline void -PutChar(chtype const ch) -/* insert character, handling automargin stuff */ -{ - if (SP->_cursrow == screen_lines - 1 && SP->_curscol == screen_columns - 1) - PutCharLR(ch); - else - PutAttrChar(ch); - - if (SP->_curscol >= screen_columns) - wrap_cursor(); - - position_check(SP->_cursrow, SP->_curscol, "PutChar"); -} - -/* - * Check whether the given character can be output by clearing commands. This - * includes test for being a space and not including any 'bad' attributes, such - * as A_REVERSE. All attribute flags which don't affect appearance of a space - * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded. - */ -static inline bool -can_clear_with(chtype ch) -{ - if (!back_color_erase && SP->_coloron) { - if (ch & A_COLOR) - return FALSE; -#if NCURSES_EXT_FUNCS - if (!SP->_default_color) - return FALSE; - if (SP->_default_fg != C_MASK || SP->_default_bg != C_MASK) - return FALSE; -#endif - } - return ((ch & ~(NONBLANK_ATTR | A_COLOR)) == BLANK); -} - -/* - * Issue a given span of characters from an array. - * Must be functionally equivalent to: - * for (i = 0; i < num; i++) - * PutChar(ntext[i]); - * but can leave the cursor positioned at the middle of the interval. - * - * Returns: 0 - cursor is at the end of interval - * 1 - cursor is somewhere in the middle - * - * This code is optimized using ech and rep. - */ -static int -EmitRange(const chtype * ntext, int num) -{ - int i; - - if (erase_chars || repeat_char) { - while (num > 0) { - int runcount; - chtype ntext0; - - while (num > 1 && ntext[0] != ntext[1]) { - PutChar(ntext[0]); - ntext++; - num--; - } - ntext0 = ntext[0]; - if (num == 1) { - PutChar(ntext0); - return 0; - } - runcount = 2; - - while (runcount < num && ntext[runcount] == ntext0) - runcount++; - - /* - * The cost expression in the middle isn't exactly right. - * _cup_ch_cost is an upper bound on the cost for moving to the - * end of the erased area, but not the cost itself (which we - * can't compute without emitting the move). This may result - * in erase_chars not getting used in some situations for - * which it would be marginally advantageous. - */ - if (erase_chars - && runcount > SP->_ech_cost + SP->_cup_ch_cost - && can_clear_with(ntext0)) { - UpdateAttrs(ntext0); - putp(tparm(erase_chars, runcount)); - - /* - * If this is the last part of the given interval, - * don't bother moving cursor, since it can be the - * last update on the line. - */ - if (runcount < num) { - GoTo(SP->_cursrow, SP->_curscol + runcount); - } else { - return 1; /* cursor stays in the middle */ - } - } else if (repeat_char && runcount > SP->_rep_cost) { - bool wrap_possible = (SP->_curscol + runcount >= screen_columns); - int rep_count = runcount; - - if (wrap_possible) - rep_count--; - - UpdateAttrs(ntext0); - putp(tparm(repeat_char, TextOf(ntext0), rep_count)); - SP->_curscol += rep_count; - - if (wrap_possible) - PutChar(ntext0); - } else { - for (i = 0; i < runcount; i++) - PutChar(ntext[i]); - } - ntext += runcount; - num -= runcount; - } - return 0; - } - - for (i = 0; i < num; i++) - PutChar(ntext[i]); - return 0; -} - -/* - * Output the line in the given range [first .. last] - * - * If there's a run of identical characters that's long enough to justify - * cursor movement, use that also. - * - * Returns: same as EmitRange - */ -static int -PutRange( - const chtype * otext, - const chtype * ntext, - int row, - int first, int last) -{ - int j, run; - - TR(TRACE_CHARPUT, ("PutRange(%p, %p, %d, %d, %d)", - otext, ntext, row, first, last)); - - if (otext != ntext - && (last - first + 1) > SP->_inline_cost) { - for (j = first, run = 0; j <= last; j++) { - if (otext[j] == ntext[j]) { - run++; - } else { - if (run > SP->_inline_cost) { - int before_run = (j - run); - EmitRange(ntext + first, before_run - first); - GoTo(row, first = j); - } - run = 0; - } - } - } - return EmitRange(ntext + first, last - first + 1); -} - -#if CC_HAS_INLINE_FUNCS -static void -callPutChar(chtype const ch) -{ - PutChar(ch); -} -#endif - -/* leave unbracketed here so 'indent' works */ -#define MARK_NOCHANGE(win,row) \ - win->_line[row].firstchar = _NOCHANGE; \ - win->_line[row].lastchar = _NOCHANGE; \ - if_USE_SCROLL_HINTS(win->_line[row].oldindex = row) - -int -doupdate(void) -{ - int i; - int nonempty; -#if USE_TRACE_TIMES - struct tms before, after; -#endif /* USE_TRACE_TIMES */ - - T((T_CALLED("doupdate()"))); - -#ifdef TRACE - if (_nc_tracing & TRACE_UPDATE) { - if (curscr->_clear) - _tracef("curscr is clear"); - else - _tracedump("curscr", curscr); - _tracedump("newscr", newscr); - } -#endif /* TRACE */ - - _nc_signal_handler(FALSE); - - if (SP->_fifohold) - SP->_fifohold--; - -#if USE_SIZECHANGE - if (SP->_endwin || SP->_sig_winch) { - /* - * This is a transparent extension: XSI does not address it, - * and applications need not know that ncurses can do it. - * - * Check if the terminal size has changed while curses was off - * (this can happen in an xterm, for example), and resize the - * ncurses data structures accordingly. - */ - _nc_update_screensize(); - } -#endif - - if (SP->_endwin) { - - T(("coming back from shell mode")); - reset_prog_mode(); - - _nc_mvcur_resume(); - _nc_screen_resume(); - SP->_mouse_resume(SP); - - SP->_endwin = FALSE; - } -#if USE_TRACE_TIMES - /* zero the metering machinery */ - _nc_outchars = 0; - (void) times(&before); -#endif /* USE_TRACE_TIMES */ - - /* - * This is the support for magic-cookie terminals. The - * theory: we scan the virtual screen looking for attribute - * turnons. Where we find one, check to make sure it's - * realizable by seeing if the required number of - * un-attributed blanks are present before and after the - * attributed range; try to shift the range boundaries over - * blanks (not changing the screen display) so this becomes - * true. If it is, shift the beginning attribute change - * appropriately (the end one, if we've gotten this far, is - * guaranteed room for its cookie). If not, nuke the added - * attributes out of the span. - */ -#if USE_XMC_SUPPORT - if (magic_cookie_glitch > 0) { - int j, k; - attr_t rattr = A_NORMAL; - - for (i = 0; i < screen_lines; i++) { - for (j = 0; j < screen_columns; j++) { - bool failed = FALSE; - chtype turnon = AttrOf(newscr->_line[i].text[j]) & ~rattr; - - /* is an attribute turned on here? */ - if (turnon == 0) { - rattr = AttrOf(newscr->_line[i].text[j]); - continue; - } - - TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr))); - TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon))); - - /* - * If the attribute change location is a blank with a - * "safe" attribute, undo the attribute turnon. This may - * ensure there's enough room to set the attribute before - * the first non-blank in the run. - */ -#define SAFE(a) (!((a) & (chtype)~NONBLANK_ATTR)) - if (TextOf(newscr->_line[i].text[j]) == ' ' && SAFE(turnon)) { - newscr->_line[i].text[j] &= ~turnon; - continue; - } - - /* check that there's enough room at start of span */ - for (k = 1; k <= magic_cookie_glitch; k++) { - if (j - k < 0 - || TextOf(newscr->_line[i].text[j - k]) != ' ' - || !SAFE(AttrOf(newscr->_line[i].text[j - k]))) - failed = TRUE; - } - if (!failed) { - bool end_onscreen = FALSE; - int m, n = j; - - /* find end of span, if it's onscreen */ - for (m = i; m < screen_lines; m++) { - for (; n < screen_columns; n++) { - if (AttrOf(newscr->_line[m].text[n]) == rattr) { - end_onscreen = TRUE; - TR(TRACE_ATTRS, - ("Range attributed with %s ends at (%d, %d)", - _traceattr(turnon), m, n)); - goto foundit; - } - } - n = 0; - } - TR(TRACE_ATTRS, - ("Range attributed with %s ends offscreen", - _traceattr(turnon))); - foundit:; - - if (end_onscreen) { - chtype *lastline = newscr->_line[m].text; - - /* - * If there are safely-attributed blanks at the - * end of the range, shorten the range. This will - * help ensure that there is enough room at end - * of span. - */ - while (n >= 0 - && TextOf(lastline[n]) == ' ' - && SAFE(AttrOf(lastline[n]))) - lastline[n--] &= ~turnon; - - /* check that there's enough room at end of span */ - for (k = 1; k <= magic_cookie_glitch; k++) - if (n + k >= screen_columns - || TextOf(lastline[n + k]) != ' ' - || !SAFE(AttrOf(lastline[n + k]))) - failed = TRUE; - } - } - - if (failed) { - int p, q = j; - - TR(TRACE_ATTRS, - ("Clearing %s beginning at (%d, %d)", - _traceattr(turnon), i, j)); - - /* turn off new attributes over span */ - for (p = i; p < screen_lines; p++) { - for (; q < screen_columns; q++) { - if (AttrOf(newscr->_line[p].text[q]) == rattr) - goto foundend; - newscr->_line[p].text[q] &= ~turnon; - } - q = 0; - } - foundend:; - } else { - TR(TRACE_ATTRS, - ("Cookie space for %s found before (%d, %d)", - _traceattr(turnon), i, j)); - - /* - * back up the start of range so there's room - * for cookies before the first nonblank character - */ - for (k = 1; k <= magic_cookie_glitch; k++) - newscr->_line[i].text[j - k] |= turnon; - } - - rattr = AttrOf(newscr->_line[i].text[j]); - } - } - -#ifdef TRACE - /* show altered highlights after magic-cookie check */ - if (_nc_tracing & TRACE_UPDATE) { - _tracef("After magic-cookie check..."); - _tracedump("newscr", newscr); - } -#endif /* TRACE */ - } -#endif /* USE_XMC_SUPPORT */ - - nonempty = 0; - if (curscr->_clear || newscr->_clear) { /* force refresh ? */ - TR(TRACE_UPDATE, ("clearing and updating from scratch")); - ClrUpdate(); - curscr->_clear = FALSE; /* reset flag */ - newscr->_clear = FALSE; /* reset flag */ - } else { - int changedlines = CHECK_INTERVAL; - - if (check_pending()) - goto cleanup; - - nonempty = min(screen_lines, newscr->_maxy + 1); - - if (SP->_scrolling) { - _nc_scroll_optimize(); - } - - nonempty = ClrBottom(nonempty); - - TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty)); - for (i = 0; i < nonempty; i++) { - /* - * Here is our line-breakout optimization. - */ - if (changedlines == CHECK_INTERVAL) { - if (check_pending()) - goto cleanup; - changedlines = 0; - } - - /* - * newscr->line[i].firstchar is normally set - * by wnoutrefresh. curscr->line[i].firstchar - * is normally set by _nc_scroll_window in the - * vertical-movement optimization code, - */ - if (newscr->_line[i].firstchar != _NOCHANGE - || curscr->_line[i].firstchar != _NOCHANGE) { - TransformLine(i); - changedlines++; - } - - /* mark line changed successfully */ - if (i <= newscr->_maxy) { - MARK_NOCHANGE(newscr, i) - } - if (i <= curscr->_maxy) { - MARK_NOCHANGE(curscr, i) - } - } - } - - /* put everything back in sync */ - for (i = nonempty; i <= newscr->_maxy; i++) { - MARK_NOCHANGE(newscr, i) - } - for (i = nonempty; i <= curscr->_maxy; i++) { - MARK_NOCHANGE(curscr, i) - } - - if (!newscr->_leaveok) { - curscr->_curx = newscr->_curx; - curscr->_cury = newscr->_cury; - - GoTo(curscr->_cury, curscr->_curx); - } - - cleanup: - /* - * Keep the physical screen in normal mode in case we get other - * processes writing to the screen. - */ - UpdateAttrs(A_NORMAL); - - _nc_flush(); - curscr->_attrs = newscr->_attrs; - -#if USE_TRACE_TIMES - (void) times(&after); - TR(TRACE_TIMES, - ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time", - _nc_outchars, - after.tms_stime - before.tms_stime, - after.tms_utime - before.tms_utime)); -#endif /* USE_TRACE_TIMES */ - - _nc_signal_handler(TRUE); - - returnCode(OK); -} - -/* - * ClrBlank(win) - * - * Returns the attributed character that corresponds to the "cleared" - * screen. If the terminal has the back-color-erase feature, this will be - * colored according to the wbkgd() call. - * - * We treat 'curscr' specially because it isn't supposed to be set directly - * in the wbkgd() call. Assume 'stdscr' for this case. - */ -#define BCE_ATTRS (A_NORMAL|A_COLOR) -#define BCE_BKGD(win) (((win) == curscr ? stdscr : (win))->_bkgd) - -static inline chtype -ClrBlank(WINDOW *win) -{ - chtype blank = BLANK; - if (back_color_erase) - blank |= (BCE_BKGD(win) & BCE_ATTRS); - return blank; -} - -/* -** ClrUpdate() -** -** Update by clearing and redrawing the entire screen. -** -*/ - -static void -ClrUpdate(void) -{ - int i; - chtype blank = ClrBlank(stdscr); - int nonempty = min(screen_lines, newscr->_maxy + 1); - - TR(TRACE_UPDATE, ("ClrUpdate() called")); - - ClearScreen(blank); - - TR(TRACE_UPDATE, ("updating screen from scratch")); - - nonempty = ClrBottom(nonempty); - - for (i = 0; i < nonempty; i++) - TransformLine(i); -} - -/* -** ClrToEOL(blank) -** -** Clear to end of current line, starting at the cursor position -*/ - -static void -ClrToEOL(chtype blank, bool needclear) -{ - int j; - - if (curscr != 0 - && SP->_cursrow >= 0) { - for (j = SP->_curscol; j < screen_columns; j++) { - if (j >= 0) { - chtype *cp = &(curscr->_line[SP->_cursrow].text[j]); - - if (*cp != blank) { - *cp = blank; - needclear = TRUE; - } - } - } - } else { - needclear = TRUE; - } - - if (needclear) { - UpdateAttrs(blank); - TPUTS_TRACE("clr_eol"); - if (SP->_el_cost > (screen_columns - SP->_curscol)) { - int count = (screen_columns - SP->_curscol); - while (count-- > 0) - PutChar(blank); - } else { - putp(clr_eol); - } - } -} - -/* -** ClrToEOS(blank) -** -** Clear to end of screen, starting at the cursor position -*/ - -static void -ClrToEOS(chtype blank) -{ - int row, col; - - row = SP->_cursrow; - col = SP->_curscol; - - UpdateAttrs(blank); - TPUTS_TRACE("clr_eos"); - tputs(clr_eos, screen_lines - row, _nc_outch); - - while (col < screen_columns) - curscr->_line[row].text[col++] = blank; - - for (row++; row < screen_lines; row++) { - for (col = 0; col < screen_columns; col++) - curscr->_line[row].text[col] = blank; - } -} - -/* - * ClrBottom(total) - * - * Test if clearing the end of the screen would satisfy part of the - * screen-update. Do this by scanning backwards through the lines in the - * screen, checking if each is blank, and one or more are changed. - */ -static int -ClrBottom(int total) -{ - int row; - int col; - int top = total; - int last = min(screen_columns, newscr->_maxx + 1); - chtype blank = ClrBlank(stdscr); - bool ok; - - if (clr_eos && can_clear_with(blank)) { - - for (row = total - 1; row >= 0; row--) { - for (col = 0, ok = TRUE; ok && col < last; col++) { - ok = (newscr->_line[row].text[col] == blank); - } - if (!ok) - break; - - for (col = 0; ok && col < last; col++) { - ok = (curscr->_line[row].text[col] == blank); - } - if (!ok) - top = row; - } - - /* don't use clr_eos for just one line if clr_eol available */ - if (top < total - 1 || (top < total && !clr_eol && !clr_bol)) { - GoTo(top, 0); - ClrToEOS(blank); - total = top; - if (SP->oldhash && SP->newhash) { - for (row = top; row < screen_lines; row++) - SP->oldhash[row] = SP->newhash[row]; - } - } - } - return total; -} - -/* -** TransformLine(lineno) -** -** Transform the given line in curscr to the one in newscr, using -** Insert/Delete Character if _nc_idcok && has_ic(). -** -** firstChar = position of first different character in line -** oLastChar = position of last different character in old line -** nLastChar = position of last different character in new line -** -** move to firstChar -** overwrite chars up to min(oLastChar, nLastChar) -** if oLastChar < nLastChar -** insert newLine[oLastChar+1..nLastChar] -** else -** delete oLastChar - nLastChar spaces -*/ - -static void -TransformLine(int const lineno) -{ - int firstChar, oLastChar, nLastChar; - chtype *newLine = newscr->_line[lineno].text; - chtype *oldLine = curscr->_line[lineno].text; - int n; - bool attrchanged = FALSE; - - TR(TRACE_UPDATE, ("TransformLine(%d) called", lineno)); - - /* copy new hash value to old one */ - if (SP->oldhash && SP->newhash) - SP->oldhash[lineno] = SP->newhash[lineno]; - -#define ColorOf(n) ((n) & A_COLOR) -#define unColor(n) ((n) & ALL_BUT_COLOR) - /* - * If we have colors, there is the possibility of having two color pairs - * that display as the same colors. For instance, Lynx does this. Check - * for this case, and update the old line with the new line's colors when - * they are equivalent. - */ - if (SP->_coloron) { - chtype oldColor; - chtype newColor; - int oldPair; - int newPair; - - for (n = 0; n < screen_columns; n++) { - if (newLine[n] != oldLine[n]) { - oldColor = ColorOf(oldLine[n]); - newColor = ColorOf(newLine[n]); - if (oldColor != newColor - && unColor(oldLine[n]) == unColor(newLine[n])) { - oldPair = PAIR_NUMBER(oldColor); - newPair = PAIR_NUMBER(newColor); - if (oldPair < COLOR_PAIRS - && newPair < COLOR_PAIRS - && SP->_color_pairs[oldPair] == SP->_color_pairs[newPair]) { - oldLine[n] &= ~A_COLOR; - oldLine[n] |= ColorOf(newLine[n]); - } - } - } - } - } - - if (ceol_standout_glitch && clr_eol) { - firstChar = 0; - while (firstChar < screen_columns) { - if (AttrOf(newLine[firstChar]) != AttrOf(oldLine[firstChar])) - attrchanged = TRUE; - firstChar++; - } - } - - firstChar = 0; - - if (attrchanged) { /* we may have to disregard the whole line */ - GoTo(lineno, firstChar); - ClrToEOL(ClrBlank(curscr), FALSE); - PutRange(oldLine, newLine, lineno, 0, (screen_columns - 1)); -#if USE_XMC_SUPPORT - -#define NEW(r,c) newscr->_line[r].text[c] -#define xmc_turn_on(a,b) ((((a)^(b)) & ~(a) & SP->_xmc_triggers) != 0) -#define xmc_turn_off(a,b) xmc_turn_on(b,a) - - /* - * This is a very simple loop to paint characters which may have the - * magic cookie glitch embedded. It doesn't know much about video - * attributes which are continued from one line to the next. It - * assumes that we have filtered out requests for attribute changes - * that do not get mapped to blank positions. - * - * FIXME: we are not keeping track of where we put the cookies, so this - * will work properly only once, since we may overwrite a cookie in a - * following operation. - */ - } else if (magic_cookie_glitch > 0) { - GoTo(lineno, firstChar); - for (n = 0; n < screen_columns; n++) { - int m = n + magic_cookie_glitch; - - /* check for turn-on: - * If we are writing an attributed blank, where the - * previous cell is not attributed. - */ - if (TextOf(newLine[n]) == ' ' - && ((n > 0 - && xmc_turn_on(newLine[n - 1], newLine[n])) - || (n == 0 - && lineno > 0 - && xmc_turn_on(NEW(lineno - 1, screen_columns - 1), - newLine[n])))) { - n = m; - } - - PutChar(newLine[n]); - - /* check for turn-off: - * If we are writing an attributed non-blank, where the - * next cell is blank, and not attributed. - */ - if (TextOf(newLine[n]) != ' ' - && ((n + 1 < screen_columns - && xmc_turn_off(newLine[n], newLine[n + 1])) - || (n + 1 >= screen_columns - && lineno + 1 < screen_lines - && xmc_turn_off(newLine[n], NEW(lineno + 1, 0))))) { - n = m; - } - - } -#undef NEW -#endif - } else { - chtype blank; - - /* find the first differing character */ - while (firstChar < screen_columns && - newLine[firstChar] == oldLine[firstChar]) - firstChar++; - - /* if there wasn't one, we're done */ - if (firstChar >= screen_columns) - return; - - /* it may be cheap to clear leading whitespace with clr_bol */ - if (clr_bol && can_clear_with(blank = newLine[0])) { - int oFirstChar, nFirstChar; - - for (oFirstChar = 0; oFirstChar < screen_columns; oFirstChar++) - if (oldLine[oFirstChar] != blank) - break; - for (nFirstChar = 0; nFirstChar < screen_columns; nFirstChar++) - if (newLine[nFirstChar] != blank) - break; - - if (nFirstChar > oFirstChar + SP->_el1_cost) { - if (nFirstChar >= screen_columns && SP->_el_cost <= SP->_el1_cost) { - GoTo(lineno, 0); - UpdateAttrs(blank); - TPUTS_TRACE("clr_eol"); - putp(clr_eol); - } else { - GoTo(lineno, nFirstChar - 1); - UpdateAttrs(blank); - TPUTS_TRACE("clr_bol"); - putp(clr_bol); - } - - while (firstChar < nFirstChar) - oldLine[firstChar++] = blank; - - if (firstChar >= screen_columns) - return; - } - } - - blank = newLine[screen_columns - 1]; - - if (!can_clear_with(blank)) { - /* find the last differing character */ - nLastChar = screen_columns - 1; - - while (nLastChar > firstChar - && newLine[nLastChar] == oldLine[nLastChar]) - nLastChar--; - - if (nLastChar >= firstChar) { - GoTo(lineno, firstChar); - PutRange(oldLine, newLine, lineno, firstChar, nLastChar); - memcpy(oldLine + firstChar, - newLine + firstChar, - (nLastChar - firstChar + 1) * sizeof(chtype)); - } - return; - } - - /* find last non-blank character on old line */ - oLastChar = screen_columns - 1; - while (oLastChar > firstChar && oldLine[oLastChar] == blank) - oLastChar--; - - /* find last non-blank character on new line */ - nLastChar = screen_columns - 1; - while (nLastChar > firstChar && newLine[nLastChar] == blank) - nLastChar--; - - if ((nLastChar == firstChar) - && (SP->_el_cost < (oLastChar - nLastChar))) { - GoTo(lineno, firstChar); - if (newLine[firstChar] != blank) - PutChar(newLine[firstChar]); - ClrToEOL(blank, FALSE); - } else if ((nLastChar != oLastChar) - && (newLine[nLastChar] != oldLine[oLastChar] - || !(_nc_idcok && has_ic()))) { - GoTo(lineno, firstChar); - if ((oLastChar - nLastChar) > SP->_el_cost) { - if (PutRange(oldLine, newLine, lineno, firstChar, nLastChar)) - GoTo(lineno, nLastChar + 1); - ClrToEOL(blank, FALSE); - } else { - n = max(nLastChar, oLastChar); - PutRange(oldLine, newLine, lineno, firstChar, n); - } - } else { - int nLastNonblank = nLastChar; - int oLastNonblank = oLastChar; - - /* find the last characters that really differ */ - while (newLine[nLastChar] == oldLine[oLastChar]) { - if (nLastChar != 0 - && oLastChar != 0) { - nLastChar--; - oLastChar--; - } else { - break; - } - } - - n = min(oLastChar, nLastChar); - if (n >= firstChar) { - GoTo(lineno, firstChar); - PutRange(oldLine, newLine, lineno, firstChar, n); - } - - if (oLastChar < nLastChar) { - int m = max(nLastNonblank, oLastNonblank); - GoTo(lineno, n + 1); - if (InsCharCost(nLastChar - oLastChar) - > (m - n)) { - PutRange(oldLine, newLine, lineno, n + 1, m); - } else { - InsStr(&newLine[n + 1], nLastChar - oLastChar); - } - } else if (oLastChar > nLastChar) { - GoTo(lineno, n + 1); - if (DelCharCost(oLastChar - nLastChar) - > SP->_el_cost + nLastNonblank - (n + 1)) { - if (PutRange(oldLine, newLine, lineno, - n + 1, nLastNonblank)) - GoTo(lineno, nLastNonblank + 1); - ClrToEOL(blank, FALSE); - } else { - /* - * The delete-char sequence will - * effectively shift in blanks from the - * right margin of the screen. Ensure - * that they are the right color by - * setting the video attributes from - * the last character on the row. - */ - UpdateAttrs(blank); - DelChar(oLastChar - nLastChar); - } - } - } - } - - /* update the code's internal representation */ - if (screen_columns > firstChar) - memcpy(oldLine + firstChar, - newLine + firstChar, - (screen_columns - firstChar) * sizeof(chtype)); -} - -/* -** ClearScreen(blank) -** -** Clear the physical screen and put cursor at home -** -*/ - -static void -ClearScreen(chtype blank) -{ - int i, j; - bool fast_clear = (clear_screen || clr_eos || clr_eol); - - TR(TRACE_UPDATE, ("ClearScreen() called")); - -#if NCURSES_EXT_FUNCS - if (SP->_coloron - && !SP->_default_color) { - _nc_do_color(COLOR_PAIR(SP->_current_attr), 0, FALSE, _nc_outch); - if (!back_color_erase) { - fast_clear = FALSE; - } - } -#endif - - if (fast_clear) { - if (clear_screen) { - UpdateAttrs(blank); - TPUTS_TRACE("clear_screen"); - putp(clear_screen); - SP->_cursrow = SP->_curscol = 0; - position_check(SP->_cursrow, SP->_curscol, "ClearScreen"); - } else if (clr_eos) { - SP->_cursrow = SP->_curscol = -1; - GoTo(0, 0); - - UpdateAttrs(blank); - TPUTS_TRACE("clr_eos"); - putp(clr_eos); - } else if (clr_eol) { - SP->_cursrow = SP->_curscol = -1; - - UpdateAttrs(blank); - for (i = 0; i < screen_lines; i++) { - GoTo(i, 0); - TPUTS_TRACE("clr_eol"); - putp(clr_eol); - } - GoTo(0, 0); - } - } else { - UpdateAttrs(blank); - for (i = 0; i < screen_lines; i++) { - GoTo(i, 0); - for (j = 0; j < screen_columns; j++) - PutChar(blank); - } - GoTo(0, 0); - } - - for (i = 0; i < screen_lines; i++) { - for (j = 0; j < screen_columns; j++) - curscr->_line[i].text[j] = blank; - } - - TR(TRACE_UPDATE, ("screen cleared")); -} - -/* -** InsStr(line, count) -** -** Insert the count characters pointed to by line. -** -*/ - -static void -InsStr(chtype * line, int count) -{ - TR(TRACE_UPDATE, ("InsStr(%p,%d) called", line, count)); - - /* Prefer parm_ich as it has the smallest cost - no need to shift - * the whole line on each character. */ - /* The order must match that of InsCharCost. */ - if (parm_ich) { - TPUTS_TRACE("parm_ich"); - tputs(tparm(parm_ich, count), count, _nc_outch); - while (count) { - PutAttrChar(*line); - line++; - count--; - } - } else if (enter_insert_mode && exit_insert_mode) { - TPUTS_TRACE("enter_insert_mode"); - putp(enter_insert_mode); - while (count) { - PutAttrChar(*line); - if (insert_padding) { - TPUTS_TRACE("insert_padding"); - putp(insert_padding); - } - line++; - count--; - } - TPUTS_TRACE("exit_insert_mode"); - putp(exit_insert_mode); - } else { - while (count) { - TPUTS_TRACE("insert_character"); - putp(insert_character); - PutAttrChar(*line); - if (insert_padding) { - TPUTS_TRACE("insert_padding"); - putp(insert_padding); - } - line++; - count--; - } - } - position_check(SP->_cursrow, SP->_curscol, "InsStr"); -} - -/* -** DelChar(count) -** -** Delete count characters at current position -** -*/ - -static void -DelChar(int count) -{ - int n; - - TR(TRACE_UPDATE, ("DelChar(%d) called, position = (%d,%d)", count, - newscr->_cury, newscr->_curx)); - - if (parm_dch) { - TPUTS_TRACE("parm_dch"); - tputs(tparm(parm_dch, count), count, _nc_outch); - } else { - for (n = 0; n < count; n++) { - TPUTS_TRACE("delete_character"); - putp(delete_character); - } - } -} - -/* -** _nc_outstr(char *str) -** -** Emit a string without waiting for update. -*/ - -void -_nc_outstr(const char *str) -{ - (void) putp(str); - _nc_flush(); -} - -/* - * Physical-scrolling support - * - * This code was adapted from Keith Bostic's hardware scrolling - * support for 4.4BSD curses. I (esr) translated it to use terminfo - * capabilities, narrowed the call interface slightly, and cleaned - * up some convoluted tests. I also added support for the memory_above - * memory_below, and non_dest_scroll_region capabilities. - * - * For this code to work, we must have either - * change_scroll_region and scroll forward/reverse commands, or - * insert and delete line capabilities. - * When the scrolling region has been set, the cursor has to - * be at the last line of the region to make the scroll up - * happen, or on the first line of region to scroll down. - * - * This code makes one aesthetic decision in the opposite way from - * BSD curses. BSD curses preferred pairs of il/dl operations - * over scrolls, allegedly because il/dl looked faster. We, on - * the other hand, prefer scrolls because (a) they're just as fast - * on many terminals and (b) using them avoids bouncing an - * unchanged bottom section of the screen up and down, which is - * visually nasty. - * - * (lav): added more cases, used dl/il when bot==maxy and in csr case. - * - * I used assumption that capabilities il/il1/dl/dl1 work inside - * changed scroll region not shifting screen contents outside of it. - * If there are any terminals behaving different way, it would be - * necessary to add some conditions to scroll_csr_forward/backward. - */ - -/* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */ -static int -scroll_csr_forward(int n, int top, int bot, int miny, int maxy, chtype blank) -{ - int i, j; - - if (n == 1 && scroll_forward && top == miny && bot == maxy) { - GoTo(bot, 0); - UpdateAttrs(blank); - TPUTS_TRACE("scroll_forward"); - tputs(scroll_forward, 0, _nc_outch); - } else if (n == 1 && delete_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("delete_line"); - tputs(delete_line, 0, _nc_outch); - } else if (parm_index && top == miny && bot == maxy) { - GoTo(bot, 0); - UpdateAttrs(blank); - TPUTS_TRACE("parm_index"); - tputs(tparm(parm_index, n, 0), n, _nc_outch); - } else if (parm_delete_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("parm_delete_line"); - tputs(tparm(parm_delete_line, n, 0), n, _nc_outch); - } else if (scroll_forward && top == miny && bot == maxy) { - GoTo(bot, 0); - UpdateAttrs(blank); - for (i = 0; i < n; i++) { - TPUTS_TRACE("scroll_forward"); - tputs(scroll_forward, 0, _nc_outch); - } - } else if (delete_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - for (i = 0; i < n; i++) { - TPUTS_TRACE("delete_line"); - tputs(delete_line, 0, _nc_outch); - } - } else - return ERR; - -#if NCURSES_EXT_FUNCS - if (FILL_BCE()) { - for (i = 0; i < n; i++) { - GoTo(bot - i, 0); - for (j = 0; j < screen_columns; j++) - PutChar(blank); - } - } -#endif - return OK; -} - -/* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */ -/* n > 0 */ -static int -scroll_csr_backward(int n, int top, int bot, int miny, int maxy, chtype blank) -{ - int i, j; - - if (n == 1 && scroll_reverse && top == miny && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("scroll_reverse"); - tputs(scroll_reverse, 0, _nc_outch); - } else if (n == 1 && insert_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("insert_line"); - tputs(insert_line, 0, _nc_outch); - } else if (parm_rindex && top == miny && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("parm_rindex"); - tputs(tparm(parm_rindex, n, 0), n, _nc_outch); - } else if (parm_insert_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - TPUTS_TRACE("parm_insert_line"); - tputs(tparm(parm_insert_line, n, 0), n, _nc_outch); - } else if (scroll_reverse && top == miny && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - for (i = 0; i < n; i++) { - TPUTS_TRACE("scroll_reverse"); - tputs(scroll_reverse, 0, _nc_outch); - } - } else if (insert_line && bot == maxy) { - GoTo(top, 0); - UpdateAttrs(blank); - for (i = 0; i < n; i++) { - TPUTS_TRACE("insert_line"); - tputs(insert_line, 0, _nc_outch); - } - } else - return ERR; - -#if NCURSES_EXT_FUNCS - if (FILL_BCE()) { - for (i = 0; i < n; i++) { - GoTo(top + i, 0); - for (j = 0; j < screen_columns; j++) - PutChar(blank); - } - } -#endif - return OK; -} - -/* scroll by using delete_line at del and insert_line at ins */ -/* n > 0 */ -static int -scroll_idl(int n, int del, int ins, chtype blank) -{ - int i; - - if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line))) - return ERR; - - GoTo(del, 0); - UpdateAttrs(blank); - if (n == 1 && delete_line) { - TPUTS_TRACE("delete_line"); - tputs(delete_line, 0, _nc_outch); - } else if (parm_delete_line) { - TPUTS_TRACE("parm_delete_line"); - tputs(tparm(parm_delete_line, n, 0), n, _nc_outch); - } else { /* if (delete_line) */ - for (i = 0; i < n; i++) { - TPUTS_TRACE("delete_line"); - tputs(delete_line, 0, _nc_outch); - } - } - - GoTo(ins, 0); - UpdateAttrs(blank); - if (n == 1 && insert_line) { - TPUTS_TRACE("insert_line"); - tputs(insert_line, 0, _nc_outch); - } else if (parm_insert_line) { - TPUTS_TRACE("parm_insert_line"); - tputs(tparm(parm_insert_line, n, 0), n, _nc_outch); - } else { /* if (insert_line) */ - for (i = 0; i < n; i++) { - TPUTS_TRACE("insert_line"); - tputs(insert_line, 0, _nc_outch); - } - } - - return OK; -} - -int -_nc_scrolln(int n, int top, int bot, int maxy) -/* scroll region from top to bot by n lines */ -{ - chtype blank = ClrBlank(stdscr); - int i; - bool cursor_saved = FALSE; - int res; - - TR(TRACE_MOVE, ("mvcur_scrolln(%d, %d, %d, %d)", n, top, bot, maxy)); - -#if USE_XMC_SUPPORT - /* - * If we scroll, we might remove a cookie. - */ - if (magic_cookie_glitch > 0) { - return (ERR); - } -#endif - - if (n > 0) { /* scroll up (forward) */ - /* - * Explicitly clear if stuff pushed off top of region might - * be saved by the terminal. - */ - res = scroll_csr_forward(n, top, bot, 0, maxy, blank); - - if (res == ERR && change_scroll_region) { - if ((((n == 1 && scroll_forward) || parm_index) - && (SP->_cursrow == bot || SP->_cursrow == bot - 1)) - && save_cursor && restore_cursor) { - cursor_saved = TRUE; - TPUTS_TRACE("save_cursor"); - tputs(save_cursor, 0, _nc_outch); - } - TPUTS_TRACE("change_scroll_region"); - tputs(tparm(change_scroll_region, top, bot), 0, _nc_outch); - if (cursor_saved) { - TPUTS_TRACE("restore_cursor"); - tputs(restore_cursor, 0, _nc_outch); - } else { - SP->_cursrow = SP->_curscol = -1; - } - - res = scroll_csr_forward(n, top, bot, top, bot, blank); - - TPUTS_TRACE("change_scroll_region"); - tputs(tparm(change_scroll_region, 0, maxy), 0, _nc_outch); - SP->_cursrow = SP->_curscol = -1; - } - - if (res == ERR && _nc_idlok) - res = scroll_idl(n, top, bot - n + 1, blank); - - /* - * Clear the newly shifted-in text. - */ - if (res != ERR - && (non_dest_scroll_region || (memory_below && bot == maxy))) { - if (bot == maxy && clr_eos) { - GoTo(bot - n, 0); - ClrToEOS(BLANK); - } else { - for (i = 0; i < n; i++) { - GoTo(bot - i, 0); - ClrToEOL(BLANK, FALSE); - } - } - } - - } else { /* (n < 0) - scroll down (backward) */ - res = scroll_csr_backward(-n, top, bot, 0, maxy, blank); - - if (res == ERR && change_scroll_region) { - if (top != 0 && (SP->_cursrow == top || SP->_cursrow == top - 1) - && save_cursor && restore_cursor) { - cursor_saved = TRUE; - TPUTS_TRACE("save_cursor"); - tputs(save_cursor, 0, _nc_outch); - } - TPUTS_TRACE("change_scroll_region"); - tputs(tparm(change_scroll_region, top, bot), 0, _nc_outch); - if (cursor_saved) { - TPUTS_TRACE("restore_cursor"); - tputs(restore_cursor, 0, _nc_outch); - } else { - SP->_cursrow = SP->_curscol = -1; - } - - res = scroll_csr_backward(-n, top, bot, top, bot, blank); - - TPUTS_TRACE("change_scroll_region"); - tputs(tparm(change_scroll_region, 0, maxy), 0, _nc_outch); - SP->_cursrow = SP->_curscol = -1; - } - - if (res == ERR && _nc_idlok) - res = scroll_idl(-n, bot + n + 1, top, blank); - - /* - * Clear the newly shifted-in text. - */ - if (res != ERR - && (non_dest_scroll_region || (memory_above && top == 0))) { - for (i = 0; i < -n; i++) { - GoTo(i + top, 0); - ClrToEOL(BLANK, FALSE); - } - } - } - - if (res == ERR) - return (ERR); - - _nc_scroll_window(curscr, n, top, bot, blank); - - /* shift hash values too - they can be reused */ - _nc_scroll_oldhash(n, top, bot); - - return (OK); -} - -void -_nc_screen_resume(void) -{ - /* make sure terminal is in a sane known state */ - SP->_current_attr = A_NORMAL; - newscr->_clear = TRUE; - - if (SP->_coloron == TRUE && orig_pair) - putp(orig_pair); - if (exit_attribute_mode) - putp(exit_attribute_mode); - else { - /* turn off attributes */ - if (exit_alt_charset_mode) - putp(exit_alt_charset_mode); - if (exit_standout_mode) - putp(exit_standout_mode); - if (exit_underline_mode) - putp(exit_underline_mode); - } - if (exit_insert_mode) - putp(exit_insert_mode); - if (enter_am_mode && exit_am_mode) - putp(auto_right_margin ? enter_am_mode : exit_am_mode); -} - -void -_nc_screen_init(void) -{ - _nc_screen_resume(); -} - -/* wrap up screen handling */ -void -_nc_screen_wrap(void) -{ - UpdateAttrs(A_NORMAL); -#if NCURSES_EXT_FUNCS - if (SP->_coloron - && !SP->_default_color) { - SP->_default_color = TRUE; - _nc_do_color(-1, 0, FALSE, _nc_outch); - SP->_default_color = FALSE; - - mvcur(SP->_cursrow, SP->_curscol, screen_lines - 1, 0); - SP->_cursrow = screen_lines - 1; - SP->_curscol = 0; - - ClrToEOL(BLANK, TRUE); - } -#endif -} - -#if USE_XMC_SUPPORT -void -_nc_do_xmc_glitch(attr_t previous) -{ - attr_t chg = XMC_CHANGES(previous ^ SP->_current_attr); - - while (chg != 0) { - if (chg & 1) { - SP->_curscol += magic_cookie_glitch; - if (SP->_curscol >= SP->_columns) - wrap_cursor(); - TR(TRACE_UPDATE, ("bumped to %d,%d after cookie", SP->_cursrow, SP->_curscol)); - } - chg >>= 1; - } -} -#endif /* USE_XMC_SUPPORT */ |