/* $OpenBSD: tty_update.c,v 1.18 2023/10/17 09:52:09 nicm Exp $ */ /**************************************************************************** * Copyright 2018-2021,2022 Thomas E. Dickey * * Copyright 1998-2016,2017 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 1992,1995 * * and: Eric S. Raymond * * and: Thomas E. Dickey 1996-on * * and: Juergen Pfeifer 2009 * ****************************************************************************/ /*----------------------------------------------------------------- * * lib_doupdate.c * * The routine doupdate() and its dependents. * All physical output is concentrated here (except _nc_outch() * in lib_tputs.c). * *-----------------------------------------------------------------*/ #define NEW_PAIR_INTERNAL 1 #include #ifndef CUR #define CUR SP_TERMTYPE #endif #if defined __HAIKU__ && defined __BEOS__ #undef __BEOS__ #endif #ifdef __BEOS__ #undef false #undef true #include #endif #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 #endif #if USE_TRACE_TIMES #include #endif #if USE_FUNC_POLL #elif HAVE_SELECT #if HAVE_SYS_SELECT_H #include #endif #endif #include MODULE_ID("$Id: tty_update.c,v 1.18 2023/10/17 09:52:09 nicm Exp $") /* * 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) (sp->_coloron && !sp->_default_color && !back_color_erase) static const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT); static NCURSES_CH_T normal = NewChar(BLANK_TEXT); /* * 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 NCURSES_INLINE NCURSES_CH_T ClrBlank(NCURSES_SP_DCLx WINDOW *win); #if NCURSES_SP_FUNCS static int ClrBottom(SCREEN *, int total); static void ClearScreen(SCREEN *, NCURSES_CH_T blank); static void ClrUpdate(SCREEN *); static void DelChar(SCREEN *, int count); static void InsStr(SCREEN *, NCURSES_CH_T *line, int count); static void TransformLine(SCREEN *, int const lineno); #else static int ClrBottom(int total); static void ClearScreen(NCURSES_CH_T blank); static void ClrUpdate(void); static void DelChar(int count); static void InsStr(NCURSES_CH_T *line, int count); static void TransformLine(int const lineno); #endif #ifdef POSITION_DEBUG /**************************************************************************** * * Debugging code. Only works on ANSI-standard terminals. * ****************************************************************************/ static void position_check(NCURSES_SP_DCLx int expected_y, int expected_x, const 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; NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG); memset(buf, '\0', sizeof(buf)); NCURSES_PUTP2_FLUSH("cpr", "\033[6n"); /* only works on ANSI-compatibles */ *(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) { NCURSES_SP_NAME(beep) (NCURSES_SP_ARG); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_2("\033[%d;%dH", expected_y + 1, expected_x + 1), 1, NCURSES_SP_NAME(_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 NCURSES_INLINE void GoTo(NCURSES_SP_DCLx int const row, int const col) { TR(TRACE_MOVE, ("GoTo(%p, %d, %d) from (%d, %d)", (void *) SP_PARM, row, col, SP_PARM->_cursrow, SP_PARM->_curscol)); position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "GoTo"); TINFO_MVCUR(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, row, col); position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "GoTo2"); } #if !NCURSES_WCWIDTH_GRAPHICS #define is_wacs_value(ch) (_nc_wacs_width(ch) == 1 && wcwidth(ch) > 1) #endif /* !NCURSES_WCWIDTH_GRAPHICS */ static NCURSES_INLINE void PutAttrChar(NCURSES_SP_DCLx CARG_CH_T ch) { int chlen = 1; NCURSES_CH_T my_ch; #if USE_WIDEC_SUPPORT PUTC_DATA; #endif NCURSES_CH_T tilde; NCURSES_CH_T attr = CHDEREF(ch); TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)", _tracech_t(ch), SP_PARM->_cursrow, SP_PARM->_curscol)); #if USE_WIDEC_SUPPORT /* * If this is not a valid character, there is nothing more to do. */ if (isWidecExt(CHDEREF(ch))) { TR(TRACE_CHARPUT, ("...skip")); return; } /* * Determine the number of character cells which the 'ch' value will use * on the screen. It should be at least one. */ if ((chlen = _nc_wacs_width(CharOf(CHDEREF(ch)))) <= 0) { static const NCURSES_CH_T blank = NewChar(BLANK_TEXT); /* * If the character falls into any of these special cases, do * not force the result to a blank: * * a) it is printable (this works around a bug in wcwidth()). * b) use_legacy_coding() has been called to modify the treatment * of codes 128-255. * c) the acs_map[] has been initialized to allow codes 0-31 * to be rendered. This supports Linux console's "PC" * characters. Codes 128-255 are allowed though this is * not checked. */ if (is8bits(CharOf(CHDEREF(ch))) && (isprint(CharOf(CHDEREF(ch))) || (SP_PARM->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160) || (SP_PARM->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128) || (AttrOf(attr) & A_ALTCHARSET && ((CharOfD(ch) < ACS_LEN && SP_PARM->_acs_map != 0 && SP_PARM->_acs_map[CharOfD(ch)] != 0) || (CharOfD(ch) >= 128))))) { ; } else { ch = CHREF(blank); TR(TRACE_CHARPUT, ("forced to blank")); } chlen = 1; } #endif if ((AttrOf(attr) & A_ALTCHARSET) && SP_PARM->_acs_map != 0 && ((CharOfD(ch) < ACS_LEN) #if !NCURSES_WCWIDTH_GRAPHICS || is_wacs_value(CharOfD(ch)) #endif )) { int c8; my_ch = CHDEREF(ch); /* work around const param */ c8 = CharOf(my_ch); #if USE_WIDEC_SUPPORT /* * This is crude & ugly, but works most of the time. It checks if the * acs_chars string specified that we have a mapping for this * character, and uses the wide-character mapping when we expect the * normal one to be broken (by mis-design ;-). */ if (SP_PARM->_screen_unicode && _nc_wacs[CharOf(my_ch)].chars[0]) { if (SP_PARM->_screen_acs_map[CharOf(my_ch)]) { if (SP_PARM->_screen_acs_fix) { RemAttr(attr, A_ALTCHARSET); my_ch = _nc_wacs[CharOf(my_ch)]; } } else { RemAttr(attr, A_ALTCHARSET); my_ch = _nc_wacs[CharOf(my_ch)]; } #if !NCURSES_WCWIDTH_GRAPHICS if (!(AttrOf(attr) & A_ALTCHARSET)) { chlen = 1; } #endif /* !NCURSES_WCWIDTH_GRAPHICS */ } else #endif if (!SP_PARM->_screen_acs_map[c8]) { /* * If we found no mapping for a given alternate-character set item * in the terminal description, attempt to use the ASCII fallback * code which is populated in the _acs_map[] array. If that did * not correspond to a line-drawing, etc., graphics character, the * array entry would be empty. */ chtype temp = UChar(SP_PARM->_acs_map[c8]); if (temp) { RemAttr(attr, A_ALTCHARSET); SetChar(my_ch, temp, AttrOf(attr)); } } /* * If we (still) have alternate character set, it is the normal 8bit * flavor. The _screen_acs_map[] array tells if the character was * really in acs_chars, needed because of the way wide/normal line * drawing flavors are integrated. */ if (AttrOf(attr) & A_ALTCHARSET) { int j = CharOfD(ch); chtype temp = UChar(SP_PARM->_acs_map[j]); if (temp != 0) { SetChar(my_ch, temp, AttrOf(attr)); } else { my_ch = CHDEREF(ch); RemAttr(attr, A_ALTCHARSET); } } ch = CHREF(my_ch); } #if USE_WIDEC_SUPPORT && !NCURSES_WCWIDTH_GRAPHICS else if (chlen > 1 && is_wacs_value(CharOfD(ch))) { chlen = 1; } #endif if (tilde_glitch && (CharOfD(ch) == L('~'))) { SetChar(tilde, L('`'), AttrOf(attr)); ch = CHREF(tilde); } UpdateAttrs(SP_PARM, attr); PUTC(CHDEREF(ch)); #if !USE_WIDEC_SUPPORT COUNT_OUTCHARS(1); #endif SP_PARM->_curscol += chlen; if (char_padding) { NCURSES_PUTP2("char_padding", char_padding); } } static bool check_pending(NCURSES_SP_DCL0) /* 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_PARM->_fifohold != 0) return FALSE; if (SP_PARM->_checkfd >= 0) { #if USE_FUNC_POLL struct pollfd fds[1]; fds[0].fd = SP_PARM->_checkfd; fds[0].events = POLLIN; if (poll(fds, (size_t) 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_PARM->_checkfd, &fdset); if (select(SP_PARM->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) { have_pending = TRUE; } #endif } if (have_pending) { SP_PARM->_fifohold = 5; NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG); } return FALSE; } /* put char at lower right corner */ static void PutCharLR(NCURSES_SP_DCLx const ARG_CH_T ch) { if (!auto_right_margin) { /* we can put the char directly */ PutAttrChar(NCURSES_SP_ARGx ch); } else if (enter_am_mode && exit_am_mode) { int oldcol = SP_PARM->_curscol; /* we can suppress automargin */ NCURSES_PUTP2("exit_am_mode", exit_am_mode); PutAttrChar(NCURSES_SP_ARGx ch); SP_PARM->_curscol = oldcol; position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "exit_am_mode"); NCURSES_PUTP2("enter_am_mode", enter_am_mode); } else if ((enter_insert_mode && exit_insert_mode) || insert_character || parm_ich) { GoTo(NCURSES_SP_ARGx screen_lines(SP_PARM) - 1, screen_columns(SP_PARM) - 2); PutAttrChar(NCURSES_SP_ARGx ch); GoTo(NCURSES_SP_ARGx screen_lines(SP_PARM) - 1, screen_columns(SP_PARM) - 2); InsStr(NCURSES_SP_ARGx NewScreen(SP_PARM)->_line[screen_lines(SP_PARM) - 1].text + screen_columns(SP_PARM) - 2, 1); } } /* * Wrap the cursor position, i.e., advance to the beginning of the next line. */ static void wrap_cursor(NCURSES_SP_DCL0) { 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 is safe to just tell the code that the cursor is in hyperspace and * let the next mvcur() call straighten things out. */ SP_PARM->_curscol = -1; SP_PARM->_cursrow = -1; } else if (auto_right_margin) { SP_PARM->_curscol = 0; SP_PARM->_cursrow++; /* * We've actually moved - but may have to work around problems with * video attributes not working. */ if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP_PARM))) { TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping", (unsigned long) AttrOf(SCREEN_ATTRS(SP_PARM)), _traceattr(AttrOf(SCREEN_ATTRS(SP_PARM))))); VIDPUTS(SP_PARM, A_NORMAL, 0); } } else { SP_PARM->_curscol--; } position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "wrap_cursor"); } static NCURSES_INLINE void PutChar(NCURSES_SP_DCLx const ARG_CH_T ch) /* insert character, handling automargin stuff */ { if (SP_PARM->_cursrow == screen_lines(SP_PARM) - 1 && SP_PARM->_curscol == screen_columns(SP_PARM) - 1) { PutCharLR(NCURSES_SP_ARGx ch); } else { PutAttrChar(NCURSES_SP_ARGx ch); } if (SP_PARM->_curscol >= screen_columns(SP_PARM)) wrap_cursor(NCURSES_SP_ARG); position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_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 NCURSES_INLINE bool can_clear_with(NCURSES_SP_DCLx ARG_CH_T ch) { if (!back_color_erase && SP_PARM->_coloron) { #if NCURSES_EXT_FUNCS int pair; if (!SP_PARM->_default_color) return FALSE; if (!(isDefaultColor(SP_PARM->_default_fg) && isDefaultColor(SP_PARM->_default_bg))) return FALSE; if ((pair = GetPair(CHDEREF(ch))) != 0) { NCURSES_COLOR_T fg, bg; if (NCURSES_SP_NAME(pair_content) (NCURSES_SP_ARGx (short) pair, &fg, &bg) == ERR || !(isDefaultColor(fg) && isDefaultColor(bg))) { return FALSE; } } #else if (AttrOfD(ch) & A_COLOR) return FALSE; #endif } return (ISBLANK(CHDEREF(ch)) && (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR); } /* * 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(NCURSES_SP_DCLx const NCURSES_CH_T *ntext, int num) { int i; TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num))); if (erase_chars || repeat_char) { while (num > 0) { int runcount; NCURSES_CH_T ntext0; while (num > 1 && !CharEq(ntext[0], ntext[1])) { PutChar(NCURSES_SP_ARGx CHREF(ntext[0])); ntext++; num--; } ntext0 = ntext[0]; if (num == 1) { PutChar(NCURSES_SP_ARGx CHREF(ntext0)); return 0; } runcount = 2; while (runcount < num && CharEq(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_PARM->_ech_cost + SP_PARM->_cup_ch_cost && can_clear_with(NCURSES_SP_ARGx CHREF(ntext0))) { UpdateAttrs(SP_PARM, ntext0); NCURSES_PUTP2("erase_chars", TIPARM_1(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(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol + runcount); } else { return 1; /* cursor stays in the middle */ } } else if (repeat_char != 0 && #if BSD_TPUTS !isdigit(UChar(CharOf(ntext0))) && #endif #if USE_WIDEC_SUPPORT (!SP_PARM->_screen_unicode && (CharOf(ntext0) < ((AttrOf(ntext0) & A_ALTCHARSET) ? ACS_LEN : 256))) && #endif runcount > SP_PARM->_rep_cost) { NCURSES_CH_T temp; bool wrap_possible = (SP_PARM->_curscol + runcount >= screen_columns(SP_PARM)); int rep_count = runcount; if (wrap_possible) rep_count--; UpdateAttrs(SP_PARM, ntext0); temp = ntext0; if ((AttrOf(temp) & A_ALTCHARSET) && SP_PARM->_acs_map != 0 && (SP_PARM->_acs_map[CharOf(temp)] & A_CHARTEXT) != 0) { SetChar(temp, (SP_PARM->_acs_map[CharOf(ntext0)] & A_CHARTEXT), AttrOf(ntext0) | A_ALTCHARSET); } NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_2(repeat_char, CharOf(temp), rep_count), 1, NCURSES_SP_NAME(_nc_outch)); SP_PARM->_curscol += rep_count; if (wrap_possible) PutChar(NCURSES_SP_ARGx CHREF(ntext0)); } else { for (i = 0; i < runcount; i++) PutChar(NCURSES_SP_ARGx CHREF(ntext[i])); } ntext += runcount; num -= runcount; } return 0; } for (i = 0; i < num; i++) PutChar(NCURSES_SP_ARGx CHREF(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(NCURSES_SP_DCLx const NCURSES_CH_T *otext, const NCURSES_CH_T *ntext, int row, int first, int last) { int rc; TR(TRACE_CHARPUT, ("PutRange(%p, %p, %p, %d, %d, %d)", (void *) SP_PARM, (const void *) otext, (const void *) ntext, row, first, last)); if (otext != ntext && (last - first + 1) > SP_PARM->_inline_cost) { int i, j, same; for (j = first, same = 0; j <= last; j++) { if (!same && isWidecExt(otext[j])) continue; if (CharEq(otext[j], ntext[j])) { same++; } else { if (same > SP_PARM->_inline_cost) { EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first); GoTo(NCURSES_SP_ARGx row, first = j); } same = 0; } } i = EmitRange(NCURSES_SP_ARGx ntext + first, j - same - first); /* * Always return 1 for the next GoTo() after a PutRange() if we found * identical characters at end of interval */ rc = (same == 0 ? i : 1); } else { rc = EmitRange(NCURSES_SP_ARGx ntext + first, last - first + 1); } return rc; } /* 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) NCURSES_EXPORT(int) TINFO_DOUPDATE(NCURSES_SP_DCL0) { int i; int nonempty; #if USE_TRACE_TIMES struct tms before, after; #endif /* USE_TRACE_TIMES */ T((T_CALLED("_nc_tinfo:doupdate(%p)"), (void *) SP_PARM)); _nc_lock_global(update); if (SP_PARM == 0) { _nc_unlock_global(update); returnCode(ERR); } #if !USE_REENTRANT /* * It is "legal" but unlikely that an application could assign a new * value to one of the standard windows. Check for that possibility * and try to recover. * * We do not allow applications to assign new values in the reentrant * model. */ #if NCURSES_SP_FUNCS if (SP_PARM == CURRENT_SCREEN) { #endif #define SyncScreens(internal,exported) \ if (internal == 0) internal = exported; \ if (internal != exported) exported = internal SyncScreens(CurScreen(SP_PARM), curscr); SyncScreens(NewScreen(SP_PARM), newscr); SyncScreens(StdScreen(SP_PARM), stdscr); #if NCURSES_SP_FUNCS } #endif #endif /* !USE_REENTRANT */ if (CurScreen(SP_PARM) == 0 || NewScreen(SP_PARM) == 0 || StdScreen(SP_PARM) == 0) { _nc_unlock_global(update); returnCode(ERR); } #ifdef TRACE if (USE_TRACEF(TRACE_UPDATE)) { if (CurScreen(SP_PARM)->_clear) _tracef("curscr is clear"); else _tracedump("curscr", CurScreen(SP_PARM)); _tracedump("newscr", NewScreen(SP_PARM)); _nc_unlock_global(tracef); } #endif /* TRACE */ _nc_signal_handler(FALSE); if (SP_PARM->_fifohold) SP_PARM->_fifohold--; #if USE_SIZECHANGE if ((SP_PARM->_endwin == ewSuspend) || _nc_handle_sigwinch(SP_PARM)) { /* * 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(SP_PARM); } #endif if (SP_PARM->_endwin == ewSuspend) { T(("coming back from shell mode")); NCURSES_SP_NAME(reset_prog_mode) (NCURSES_SP_ARG); NCURSES_SP_NAME(_nc_mvcur_resume) (NCURSES_SP_ARG); NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG); SP_PARM->_mouse_resume(SP_PARM); SP_PARM->_endwin = ewRunning; } #if USE_TRACE_TIMES /* zero the metering machinery */ RESET_OUTCHARS(); (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 is 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(SP_PARM); i++) { for (j = 0; j < screen_columns(SP_PARM); j++) { bool failed = FALSE; NCURSES_CH_T *thisline = NewScreen(SP_PARM)->_line[i].text; attr_t thisattr = AttrOf(thisline[j]) & SP_PARM->_xmc_triggers; attr_t turnon = thisattr & ~rattr; /* is an attribute turned on here? */ if (turnon == 0) { rattr = thisattr; 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(scr,a) (!((a) & (scr)->_xmc_triggers)) if (ISBLANK(thisline[j]) && SAFE(SP_PARM, turnon)) { RemAttr(thisline[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 || !ISBLANK(thisline[j - k]) || !SAFE(SP_PARM, AttrOf(thisline[j - k]))) { failed = TRUE; TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s", i, j - k, (ISBLANK(thisline[j - k]) ? "" : ":nonblank"), (SAFE(SP_PARM, AttrOf(thisline[j - k])) ? "" : ":unsafe"))); break; } } if (!failed) { bool end_onscreen = FALSE; int m, n = j; /* find end of span, if it is onscreen */ for (m = i; m < screen_lines(SP_PARM); m++) { for (; n < screen_columns(SP_PARM); n++) { attr_t testattr = AttrOf(NewScreen(SP_PARM)->_line[m].text[n]); if ((testattr & SP_PARM->_xmc_triggers) == 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) { NCURSES_CH_T *lastline = NewScreen(SP_PARM)->_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 && ISBLANK(lastline[n]) && SAFE(SP_PARM, AttrOf(lastline[n]))) { RemAttr(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(SP_PARM) || !ISBLANK(lastline[n + k]) || !SAFE(SP_PARM, AttrOf(lastline[n + k]))) { failed = TRUE; TR(TRACE_ATTRS, ("No room at end in %d,%d%s%s", i, j - k, (ISBLANK(lastline[n + k]) ? "" : ":nonblank"), (SAFE(SP_PARM, AttrOf(lastline[n + k])) ? "" : ":unsafe"))); break; } } } } 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(SP_PARM); p++) { for (; q < screen_columns(SP_PARM); q++) { attr_t testattr = AttrOf(newscr->_line[p].text[q]); if ((testattr & SP_PARM->_xmc_triggers) == rattr) goto foundend; RemAttr(NewScreen(SP_PARM)->_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++) AddAttr(thisline[j - k], turnon); } rattr = thisattr; } } #ifdef TRACE /* show altered highlights after magic-cookie check */ if (USE_TRACEF(TRACE_UPDATE)) { _tracef("After magic-cookie check..."); _tracedump("newscr", NewScreen(SP_PARM)); _nc_unlock_global(tracef); } #endif /* TRACE */ } #endif /* USE_XMC_SUPPORT */ nonempty = 0; if (CurScreen(SP_PARM)->_clear || NewScreen(SP_PARM)->_clear) { /* force refresh ? */ ClrUpdate(NCURSES_SP_ARG); CurScreen(SP_PARM)->_clear = FALSE; /* reset flag */ NewScreen(SP_PARM)->_clear = FALSE; /* reset flag */ } else { int changedlines = CHECK_INTERVAL; if (check_pending(NCURSES_SP_ARG)) goto cleanup; nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1); if (SP_PARM->_scrolling) { NCURSES_SP_NAME(_nc_scroll_optimize) (NCURSES_SP_ARG); } nonempty = ClrBottom(NCURSES_SP_ARGx 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(NCURSES_SP_ARG)) 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 (NewScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE || CurScreen(SP_PARM)->_line[i].firstchar != _NOCHANGE) { TransformLine(NCURSES_SP_ARGx i); changedlines++; } /* mark line changed successfully */ if (i <= NewScreen(SP_PARM)->_maxy) { MARK_NOCHANGE(NewScreen(SP_PARM), i); } if (i <= CurScreen(SP_PARM)->_maxy) { MARK_NOCHANGE(CurScreen(SP_PARM), i); } } } /* put everything back in sync */ for (i = nonempty; i <= NewScreen(SP_PARM)->_maxy; i++) { MARK_NOCHANGE(NewScreen(SP_PARM), i); } for (i = nonempty; i <= CurScreen(SP_PARM)->_maxy; i++) { MARK_NOCHANGE(CurScreen(SP_PARM), i); } if (!NewScreen(SP_PARM)->_leaveok) { CurScreen(SP_PARM)->_curx = NewScreen(SP_PARM)->_curx; CurScreen(SP_PARM)->_cury = NewScreen(SP_PARM)->_cury; GoTo(NCURSES_SP_ARGx CurScreen(SP_PARM)->_cury, CurScreen(SP_PARM)->_curx); } cleanup: /* * We would like to keep the physical screen in normal mode in case we get * other processes writing to the screen. This goal cannot be met for * magic cookies since it interferes with attributes that may propagate * past the current position. */ #if USE_XMC_SUPPORT if (magic_cookie_glitch != 0) #endif UpdateAttrs(SP_PARM, normal); NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG); WINDOW_ATTRS(CurScreen(SP_PARM)) = WINDOW_ATTRS(NewScreen(SP_PARM)); #if USE_TRACE_TIMES (void) times(&after); TR(TRACE_TIMES, ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time", _nc_outchars, (long) (after.tms_stime - before.tms_stime), (long) (after.tms_utime - before.tms_utime))); #endif /* USE_TRACE_TIMES */ _nc_signal_handler(TRUE); _nc_unlock_global(update); returnCode(OK); } #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER) NCURSES_EXPORT(int) doupdate(void) { return TINFO_DOUPDATE(CURRENT_SCREEN); } #endif /* * 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(sp,win) (((win) == CurScreen(sp) ? StdScreen(sp) : (win))->_nc_bkgd) static NCURSES_INLINE NCURSES_CH_T ClrBlank(NCURSES_SP_DCLx WINDOW *win) { NCURSES_CH_T blank = blankchar; if (back_color_erase) AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS)); return blank; } /* ** ClrUpdate() ** ** Update by clearing and redrawing the entire screen. ** */ static void ClrUpdate(NCURSES_SP_DCL0) { TR(TRACE_UPDATE, (T_CALLED("ClrUpdate"))); if (0 != SP_PARM) { int i; NCURSES_CH_T blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM)); int nonempty = min(screen_lines(SP_PARM), NewScreen(SP_PARM)->_maxy + 1); ClearScreen(NCURSES_SP_ARGx blank); TR(TRACE_UPDATE, ("updating screen from scratch")); nonempty = ClrBottom(NCURSES_SP_ARGx nonempty); for (i = 0; i < nonempty; i++) TransformLine(NCURSES_SP_ARGx i); } TR(TRACE_UPDATE, (T_RETURN(""))); } /* ** ClrToEOL(blank) ** ** Clear to end of current line, starting at the cursor position */ static void ClrToEOL(NCURSES_SP_DCLx NCURSES_CH_T blank, int needclear) { if (CurScreen(SP_PARM) != 0 && SP_PARM->_cursrow >= 0) { int j; for (j = SP_PARM->_curscol; j < screen_columns(SP_PARM); j++) { if (j >= 0) { NCURSES_CH_T *cp = &(CurScreen(SP_PARM)->_line[SP_PARM->_cursrow].text[j]); if (!CharEq(*cp, blank)) { *cp = blank; needclear = TRUE; } } } } if (needclear) { UpdateAttrs(SP_PARM, blank); if (clr_eol && SP_PARM->_el_cost <= (screen_columns(SP_PARM) - SP_PARM->_curscol)) { NCURSES_PUTP2("clr_eol", clr_eol); } else { int count = (screen_columns(SP_PARM) - SP_PARM->_curscol); while (count-- > 0) PutChar(NCURSES_SP_ARGx CHREF(blank)); } } } /* ** ClrToEOS(blank) ** ** Clear to end of screen, starting at the cursor position */ static void ClrToEOS(NCURSES_SP_DCLx NCURSES_CH_T blank) { int row, col; row = SP_PARM->_cursrow; col = SP_PARM->_curscol; if (row < 0) row = 0; if (col < 0) col = 0; UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("clr_eos"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx clr_eos, screen_lines(SP_PARM) - row, NCURSES_SP_NAME(_nc_outch)); while (col < screen_columns(SP_PARM)) CurScreen(SP_PARM)->_line[row].text[col++] = blank; for (row++; row < screen_lines(SP_PARM); row++) { for (col = 0; col < screen_columns(SP_PARM); col++) CurScreen(SP_PARM)->_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(NCURSES_SP_DCLx int total) { int top = total; int last = min(screen_columns(SP_PARM), NewScreen(SP_PARM)->_maxx + 1); NCURSES_CH_T blank = NewScreen(SP_PARM)->_line[total - 1].text[last - 1]; if (clr_eos && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) { int row; for (row = total - 1; row >= 0; row--) { int col; bool ok; for (col = 0, ok = TRUE; ok && col < last; col++) { ok = (CharEq(NewScreen(SP_PARM)->_line[row].text[col], blank)); } if (!ok) break; for (col = 0; ok && col < last; col++) { ok = (CharEq(CurScreen(SP_PARM)->_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) { GoTo(NCURSES_SP_ARGx top, 0); ClrToEOS(NCURSES_SP_ARGx blank); if (SP_PARM->oldhash && SP_PARM->newhash) { for (row = top; row < screen_lines(SP_PARM); row++) SP_PARM->oldhash[row] = SP_PARM->newhash[row]; } } } return top; } #if USE_XMC_SUPPORT #if USE_WIDEC_SUPPORT #define check_xmc_transition(sp, a, b) \ ((((a)->attr ^ (b)->attr) & ~((a)->attr) & (sp)->_xmc_triggers) != 0) #define xmc_turn_on(sp,a,b) check_xmc_transition(sp,&(a), &(b)) #else #define xmc_turn_on(sp,a,b) ((((a)^(b)) & ~(a) & (sp)->_xmc_triggers) != 0) #endif #define xmc_new(sp,r,c) NewScreen(sp)->_line[r].text[c] #define xmc_turn_off(sp,a,b) xmc_turn_on(sp,b,a) #endif /* USE_XMC_SUPPORT */ /* ** TransformLine(lineno) ** ** Transform the given line in curscr to the one in newscr, using ** Insert/Delete Character if 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(NCURSES_SP_DCLx int const lineno) { int firstChar, oLastChar, nLastChar; NCURSES_CH_T *newLine = NewScreen(SP_PARM)->_line[lineno].text; NCURSES_CH_T *oldLine = CurScreen(SP_PARM)->_line[lineno].text; int n; bool attrchanged = FALSE; TR(TRACE_UPDATE, (T_CALLED("TransformLine(%p, %d)"), (void *) SP_PARM, lineno)); /* copy new hash value to old one */ if (SP_PARM->oldhash && SP_PARM->newhash) SP_PARM->oldhash[lineno] = SP_PARM->newhash[lineno]; /* * 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_PARM->_coloron) { int oldPair; int newPair; for (n = 0; n < screen_columns(SP_PARM); n++) { if (!CharEq(newLine[n], oldLine[n])) { oldPair = GetPair(oldLine[n]); newPair = GetPair(newLine[n]); if (oldPair != newPair && unColor(oldLine[n]) == unColor(newLine[n])) { if (oldPair < SP_PARM->_pair_alloc && newPair < SP_PARM->_pair_alloc && (isSamePair(SP_PARM->_color_pairs[oldPair], SP_PARM->_color_pairs[newPair]))) { SetPair(oldLine[n], GetPair(newLine[n])); } } } } } if (ceol_standout_glitch && clr_eol) { firstChar = 0; while (firstChar < screen_columns(SP_PARM)) { if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) { attrchanged = TRUE; break; } firstChar++; } } firstChar = 0; if (attrchanged) { /* we may have to disregard the whole line */ GoTo(NCURSES_SP_ARGx lineno, firstChar); ClrToEOL(NCURSES_SP_ARGx ClrBlank(NCURSES_SP_ARGx CurScreen(SP_PARM)), FALSE); PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, 0, screen_columns(SP_PARM) - 1); #if USE_XMC_SUPPORT /* * 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(NCURSES_SP_ARGx lineno, firstChar); for (n = 0; n < screen_columns(SP_PARM); 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 (ISBLANK(newLine[n]) && ((n > 0 && xmc_turn_on(SP_PARM, newLine[n - 1], newLine[n])) || (n == 0 && lineno > 0 && xmc_turn_on(SP_PARM, xmc_new(SP_PARM, lineno - 1, screen_columns(SP_PARM) - 1), newLine[n])))) { n = m; } PutChar(NCURSES_SP_ARGx CHREF(newLine[n])); /* check for turn-off: * If we are writing an attributed non-blank, where the * next cell is blank, and not attributed. */ if (!ISBLANK(newLine[n]) && ((n + 1 < screen_columns(SP_PARM) && xmc_turn_off(SP_PARM, newLine[n], newLine[n + 1])) || (n + 1 >= screen_columns(SP_PARM) && lineno + 1 < screen_lines(SP_PARM) && xmc_turn_off(SP_PARM, newLine[n], xmc_new(SP_PARM, lineno + 1, 0))))) { n = m; } } #endif } else { NCURSES_CH_T blank; /* it may be cheap to clear leading whitespace with clr_bol */ blank = newLine[0]; if (clr_bol && can_clear_with(NCURSES_SP_ARGx CHREF(blank))) { int oFirstChar, nFirstChar; for (oFirstChar = 0; oFirstChar < screen_columns(SP_PARM); oFirstChar++) if (!CharEq(oldLine[oFirstChar], blank)) break; for (nFirstChar = 0; nFirstChar < screen_columns(SP_PARM); nFirstChar++) if (!CharEq(newLine[nFirstChar], blank)) break; if (nFirstChar == oFirstChar) { firstChar = nFirstChar; /* find the first differing character */ while (firstChar < screen_columns(SP_PARM) && CharEq(newLine[firstChar], oldLine[firstChar])) firstChar++; } else if (oFirstChar > nFirstChar) { firstChar = nFirstChar; } else { /* oFirstChar < nFirstChar */ firstChar = oFirstChar; if (SP_PARM->_el1_cost < nFirstChar - oFirstChar) { if (nFirstChar >= screen_columns(SP_PARM) && SP_PARM->_el_cost <= SP_PARM->_el1_cost) { GoTo(NCURSES_SP_ARGx lineno, 0); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("clr_eol", clr_eol); } else { GoTo(NCURSES_SP_ARGx lineno, nFirstChar - 1); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("clr_bol", clr_bol); } while (firstChar < nFirstChar) oldLine[firstChar++] = blank; } } } else { /* find the first differing character */ while (firstChar < screen_columns(SP_PARM) && CharEq(newLine[firstChar], oldLine[firstChar])) firstChar++; } /* if there wasn't one, we're done */ if (firstChar >= screen_columns(SP_PARM)) { TR(TRACE_UPDATE, (T_RETURN(""))); return; } blank = newLine[screen_columns(SP_PARM) - 1]; if (!can_clear_with(NCURSES_SP_ARGx CHREF(blank))) { /* find the last differing character */ nLastChar = screen_columns(SP_PARM) - 1; while (nLastChar > firstChar && CharEq(newLine[nLastChar], oldLine[nLastChar])) nLastChar--; if (nLastChar >= firstChar) { GoTo(NCURSES_SP_ARGx lineno, firstChar); PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, firstChar, nLastChar); memcpy(oldLine + firstChar, newLine + firstChar, (unsigned) (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T)); } TR(TRACE_UPDATE, (T_RETURN(""))); return; } /* find last non-blank character on old line */ oLastChar = screen_columns(SP_PARM) - 1; while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank)) oLastChar--; /* find last non-blank character on new line */ nLastChar = screen_columns(SP_PARM) - 1; while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank)) nLastChar--; if ((nLastChar == firstChar) && (SP_PARM->_el_cost < (oLastChar - nLastChar))) { GoTo(NCURSES_SP_ARGx lineno, firstChar); if (!CharEq(newLine[firstChar], blank)) PutChar(NCURSES_SP_ARGx CHREF(newLine[firstChar])); ClrToEOL(NCURSES_SP_ARGx blank, FALSE); } else if ((nLastChar != oLastChar) && (!CharEq(newLine[nLastChar], oldLine[oLastChar]) || !(SP_PARM->_nc_sp_idcok && NCURSES_SP_NAME(has_ic) (NCURSES_SP_ARG)))) { GoTo(NCURSES_SP_ARGx lineno, firstChar); if ((oLastChar - nLastChar) > SP_PARM->_el_cost) { if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, firstChar, nLastChar)) { GoTo(NCURSES_SP_ARGx lineno, nLastChar + 1); } ClrToEOL(NCURSES_SP_ARGx blank, FALSE); } else { n = max(nLastChar, oLastChar); PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, firstChar, n); } } else { int nLastNonblank = nLastChar; int oLastNonblank = oLastChar; /* find the last characters that really differ */ /* can be -1 if no characters differ */ while (CharEq(newLine[nLastChar], oldLine[oLastChar])) { /* don't split a wide char */ if (isWidecExt(newLine[nLastChar]) && !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1])) break; nLastChar--; oLastChar--; if (nLastChar == -1 || oLastChar == -1) break; } n = min(oLastChar, nLastChar); if (n >= firstChar) { GoTo(NCURSES_SP_ARGx lineno, firstChar); PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, firstChar, n); } if (oLastChar < nLastChar) { int m = max(nLastNonblank, oLastNonblank); #if USE_WIDEC_SUPPORT if (n) { while (isWidecExt(newLine[n + 1]) && n) { --n; --oLastChar; /* increase cost */ } } else if (n >= firstChar && isWidecBase(newLine[n])) { while (isWidecExt(newLine[n + 1])) { ++n; ++oLastChar; /* decrease cost */ } } #endif GoTo(NCURSES_SP_ARGx lineno, n + 1); if ((nLastChar < nLastNonblank) || InsCharCost(SP_PARM, nLastChar - oLastChar) > (m - n)) { PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, n + 1, m); } else { InsStr(NCURSES_SP_ARGx &newLine[n + 1], nLastChar - oLastChar); } } else if (oLastChar > nLastChar) { GoTo(NCURSES_SP_ARGx lineno, n + 1); if (DelCharCost(SP_PARM, oLastChar - nLastChar) > SP_PARM->_el_cost + nLastNonblank - (n + 1)) { if (PutRange(NCURSES_SP_ARGx oldLine, newLine, lineno, n + 1, nLastNonblank)) { GoTo(NCURSES_SP_ARGx lineno, nLastNonblank + 1); } ClrToEOL(NCURSES_SP_ARGx 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(SP_PARM, blank); DelChar(NCURSES_SP_ARGx oLastChar - nLastChar); } } } } /* update the code's internal representation */ if (screen_columns(SP_PARM) > firstChar) memcpy(oldLine + firstChar, newLine + firstChar, (unsigned) (screen_columns(SP_PARM) - firstChar) * sizeof(NCURSES_CH_T)); TR(TRACE_UPDATE, (T_RETURN(""))); return; } /* ** ClearScreen(blank) ** ** Clear the physical screen and put cursor at home ** */ static void ClearScreen(NCURSES_SP_DCLx NCURSES_CH_T blank) { int i, j; bool fast_clear = (clear_screen || clr_eos || clr_eol); TR(TRACE_UPDATE, ("ClearScreen() called")); #if NCURSES_EXT_FUNCS if (SP_PARM->_coloron && !SP_PARM->_default_color) { NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx (short) GET_SCREEN_PAIR(SP_PARM), 0, FALSE, NCURSES_SP_NAME(_nc_outch)); if (!back_color_erase) { fast_clear = FALSE; } } #endif if (fast_clear) { if (clear_screen) { UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("clear_screen", clear_screen); SP_PARM->_cursrow = SP_PARM->_curscol = 0; position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "ClearScreen"); } else if (clr_eos) { SP_PARM->_cursrow = SP_PARM->_curscol = -1; GoTo(NCURSES_SP_ARGx 0, 0); UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("clr_eos"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx clr_eos, screen_lines(SP_PARM), NCURSES_SP_NAME(_nc_outch)); } else if (clr_eol) { SP_PARM->_cursrow = SP_PARM->_curscol = -1; UpdateAttrs(SP_PARM, blank); for (i = 0; i < screen_lines(SP_PARM); i++) { GoTo(NCURSES_SP_ARGx i, 0); NCURSES_PUTP2("clr_eol", clr_eol); } GoTo(NCURSES_SP_ARGx 0, 0); } } else { UpdateAttrs(SP_PARM, blank); for (i = 0; i < screen_lines(SP_PARM); i++) { GoTo(NCURSES_SP_ARGx i, 0); for (j = 0; j < screen_columns(SP_PARM); j++) PutChar(NCURSES_SP_ARGx CHREF(blank)); } GoTo(NCURSES_SP_ARGx 0, 0); } for (i = 0; i < screen_lines(SP_PARM); i++) { for (j = 0; j < screen_columns(SP_PARM); j++) CurScreen(SP_PARM)->_line[i].text[j] = blank; } TR(TRACE_UPDATE, ("screen cleared")); } /* ** InsStr(line, count) ** ** Insert the count characters pointed to by line. ** */ static void InsStr(NCURSES_SP_DCLx NCURSES_CH_T *line, int count) { TR(TRACE_UPDATE, ("InsStr(%p, %p,%d) called", (void *) SP_PARM, (void *) 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"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_ich, count), 1, NCURSES_SP_NAME(_nc_outch)); while (count > 0) { PutAttrChar(NCURSES_SP_ARGx CHREF(*line)); line++; count--; } } else if (enter_insert_mode && exit_insert_mode) { NCURSES_PUTP2("enter_insert_mode", enter_insert_mode); while (count > 0) { PutAttrChar(NCURSES_SP_ARGx CHREF(*line)); if (insert_padding) { NCURSES_PUTP2("insert_padding", insert_padding); } line++; count--; } NCURSES_PUTP2("exit_insert_mode", exit_insert_mode); } else { while (count > 0) { NCURSES_PUTP2("insert_character", insert_character); PutAttrChar(NCURSES_SP_ARGx CHREF(*line)); if (insert_padding) { NCURSES_PUTP2("insert_padding", insert_padding); } line++; count--; } } position_check(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, "InsStr"); } /* ** DelChar(count) ** ** Delete count characters at current position ** */ static void DelChar(NCURSES_SP_DCLx int count) { TR(TRACE_UPDATE, ("DelChar(%p, %d) called, position = (%ld,%ld)", (void *) SP_PARM, count, (long) NewScreen(SP_PARM)->_cury, (long) NewScreen(SP_PARM)->_curx)); if (parm_dch) { TPUTS_TRACE("parm_dch"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_dch, count), 1, NCURSES_SP_NAME(_nc_outch)); } else { int n; for (n = 0; n < count; n++) { NCURSES_PUTP2("delete_character", delete_character); } } } /* * 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(NCURSES_SP_DCLx int n, int top, int bot, int miny, int maxy, NCURSES_CH_T blank) { int i; if (n == 1 && scroll_forward && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx bot, 0); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("scroll_forward", scroll_forward); } else if (n == 1 && delete_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("delete_line", delete_line); } else if (parm_index && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx bot, 0); UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("parm_index"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_index, n), n, NCURSES_SP_NAME(_nc_outch)); } else if (parm_delete_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("parm_delete_line"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_delete_line, n), n, NCURSES_SP_NAME(_nc_outch)); } else if (scroll_forward && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx bot, 0); UpdateAttrs(SP_PARM, blank); for (i = 0; i < n; i++) { NCURSES_PUTP2("scroll_forward", scroll_forward); } } else if (delete_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); for (i = 0; i < n; i++) { NCURSES_PUTP2("delete_line", delete_line); } } else return ERR; #if NCURSES_EXT_FUNCS if (FILL_BCE(SP_PARM)) { int j; for (i = 0; i < n; i++) { GoTo(NCURSES_SP_ARGx bot - i, 0); for (j = 0; j < screen_columns(SP_PARM); j++) PutChar(NCURSES_SP_ARGx CHREF(blank)); } } #endif return OK; } /* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */ /* n > 0 */ static int scroll_csr_backward(NCURSES_SP_DCLx int n, int top, int bot, int miny, int maxy, NCURSES_CH_T blank) { int i; if (n == 1 && scroll_reverse && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("scroll_reverse", scroll_reverse); } else if (n == 1 && insert_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); NCURSES_PUTP2("insert_line", insert_line); } else if (parm_rindex && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("parm_rindex"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_rindex, n), n, NCURSES_SP_NAME(_nc_outch)); } else if (parm_insert_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); TPUTS_TRACE("parm_insert_line"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_insert_line, n), n, NCURSES_SP_NAME(_nc_outch)); } else if (scroll_reverse && top == miny && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); for (i = 0; i < n; i++) { NCURSES_PUTP2("scroll_reverse", scroll_reverse); } } else if (insert_line && bot == maxy) { GoTo(NCURSES_SP_ARGx top, 0); UpdateAttrs(SP_PARM, blank); for (i = 0; i < n; i++) { NCURSES_PUTP2("insert_line", insert_line); } } else return ERR; #if NCURSES_EXT_FUNCS if (FILL_BCE(SP_PARM)) { int j; for (i = 0; i < n; i++) { GoTo(NCURSES_SP_ARGx top + i, 0); for (j = 0; j < screen_columns(SP_PARM); j++) PutChar(NCURSES_SP_ARGx CHREF(blank)); } } #endif return OK; } /* scroll by using delete_line at del and insert_line at ins */ /* n > 0 */ static int scroll_idl(NCURSES_SP_DCLx int n, int del, int ins, NCURSES_CH_T blank) { int i; if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line))) return ERR; GoTo(NCURSES_SP_ARGx del, 0); UpdateAttrs(SP_PARM, blank); if (n == 1 && delete_line) { NCURSES_PUTP2("delete_line", delete_line); } else if (parm_delete_line) { TPUTS_TRACE("parm_delete_line"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_delete_line, n), n, NCURSES_SP_NAME(_nc_outch)); } else { /* if (delete_line) */ for (i = 0; i < n; i++) { NCURSES_PUTP2("delete_line", delete_line); } } GoTo(NCURSES_SP_ARGx ins, 0); UpdateAttrs(SP_PARM, blank); if (n == 1 && insert_line) { NCURSES_PUTP2("insert_line", insert_line); } else if (parm_insert_line) { TPUTS_TRACE("parm_insert_line"); NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx TIPARM_1(parm_insert_line, n), n, NCURSES_SP_NAME(_nc_outch)); } else { /* if (insert_line) */ for (i = 0; i < n; i++) { NCURSES_PUTP2("insert_line", insert_line); } } return OK; } /* * Note: some terminals require the cursor to be within the scrolling margins * before setting them. Generally, the cursor must be at the appropriate end * of the scrolling margins when issuing an indexing operation (it is not * apparent whether it must also be at the left margin; we do this just to be * safe). To make the related cursor movement a little faster, we use the * save/restore cursor capabilities if the terminal has them. */ NCURSES_EXPORT(int) NCURSES_SP_NAME(_nc_scrolln) (NCURSES_SP_DCLx int n, int top, int bot, int maxy) /* scroll region from top to bot by n lines */ { NCURSES_CH_T blank; int i; bool cursor_saved = FALSE; int res; TR(TRACE_MOVE, ("_nc_scrolln(%p, %d, %d, %d, %d)", (void *) SP_PARM, n, top, bot, maxy)); if (!IsValidScreen(SP_PARM)) return (ERR); blank = ClrBlank(NCURSES_SP_ARGx StdScreen(SP_PARM)); #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(NCURSES_SP_ARGx n, top, bot, 0, maxy, blank); if (res == ERR && change_scroll_region) { if ((((n == 1 && scroll_forward) || parm_index) && (SP_PARM->_cursrow == bot || SP_PARM->_cursrow == bot - 1)) && save_cursor && restore_cursor) { cursor_saved = TRUE; NCURSES_PUTP2("save_cursor", save_cursor); } NCURSES_PUTP2("change_scroll_region", TIPARM_2(change_scroll_region, top, bot)); if (cursor_saved) { NCURSES_PUTP2("restore_cursor", restore_cursor); } else { SP_PARM->_cursrow = SP_PARM->_curscol = -1; } res = scroll_csr_forward(NCURSES_SP_ARGx n, top, bot, top, bot, blank); NCURSES_PUTP2("change_scroll_region", TIPARM_2(change_scroll_region, 0, maxy)); SP_PARM->_cursrow = SP_PARM->_curscol = -1; } if (res == ERR && SP_PARM->_nc_sp_idlok) res = scroll_idl(NCURSES_SP_ARGx n, top, bot - n + 1, blank); /* * Clear the newly shifted-in text. */ if (res != ERR && (non_dest_scroll_region || (memory_below && bot == maxy))) { static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT); if (bot == maxy && clr_eos) { GoTo(NCURSES_SP_ARGx bot - n + 1, 0); ClrToEOS(NCURSES_SP_ARGx blank2); } else { for (i = 0; i < n; i++) { GoTo(NCURSES_SP_ARGx bot - i, 0); ClrToEOL(NCURSES_SP_ARGx blank2, FALSE); } } } } else { /* (n < 0) - scroll down (backward) */ res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, 0, maxy, blank); if (res == ERR && change_scroll_region) { if (top != 0 && (SP_PARM->_cursrow == top || SP_PARM->_cursrow == top - 1) && save_cursor && restore_cursor) { cursor_saved = TRUE; NCURSES_PUTP2("save_cursor", save_cursor); } NCURSES_PUTP2("change_scroll_region", TIPARM_2(change_scroll_region, top, bot)); if (cursor_saved) { NCURSES_PUTP2("restore_cursor", restore_cursor); } else { SP_PARM->_cursrow = SP_PARM->_curscol = -1; } res = scroll_csr_backward(NCURSES_SP_ARGx -n, top, bot, top, bot, blank); NCURSES_PUTP2("change_scroll_region", TIPARM_2(change_scroll_region, 0, maxy)); SP_PARM->_cursrow = SP_PARM->_curscol = -1; } if (res == ERR && SP_PARM->_nc_sp_idlok) res = scroll_idl(NCURSES_SP_ARGx -n, bot + n + 1, top, blank); /* * Clear the newly shifted-in text. */ if (res != ERR && (non_dest_scroll_region || (memory_above && top == 0))) { static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT); for (i = 0; i < -n; i++) { GoTo(NCURSES_SP_ARGx i + top, 0); ClrToEOL(NCURSES_SP_ARGx blank2, FALSE); } } } if (res == ERR) return (ERR); _nc_scroll_window(CurScreen(SP_PARM), n, (NCURSES_SIZE_T) top, (NCURSES_SIZE_T) bot, blank); /* shift hash values too - they can be reused */ NCURSES_SP_NAME(_nc_scroll_oldhash) (NCURSES_SP_ARGx n, top, bot); return (OK); } #if NCURSES_SP_FUNCS NCURSES_EXPORT(int) _nc_scrolln(int n, int top, int bot, int maxy) { return NCURSES_SP_NAME(_nc_scrolln) (CURRENT_SCREEN, n, top, bot, maxy); } #endif NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_DCL0) { assert(SP_PARM); /* make sure terminal is in a sane known state */ SetAttr(SCREEN_ATTRS(SP_PARM), A_NORMAL); NewScreen(SP_PARM)->_clear = TRUE; /* reset color pairs and definitions */ if (SP_PARM->_coloron || SP_PARM->_color_defs) NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG); /* restore user-defined colors, if any */ if (SP_PARM->_color_defs < 0 && !SP_PARM->_direct_color.value) { int n; SP_PARM->_color_defs = -(SP_PARM->_color_defs); for (n = 0; n < SP_PARM->_color_defs; ++n) { if (SP_PARM->_color_table[n].init) { _nc_init_color(SP_PARM, n, SP_PARM->_color_table[n].r, SP_PARM->_color_table[n].g, SP_PARM->_color_table[n].b); } } } if (exit_attribute_mode) NCURSES_PUTP2("exit_attribute_mode", exit_attribute_mode); else { /* turn off attributes */ if (exit_alt_charset_mode) NCURSES_PUTP2("exit_alt_charset_mode", exit_alt_charset_mode); if (exit_standout_mode) NCURSES_PUTP2("exit_standout_mode", exit_standout_mode); if (exit_underline_mode) NCURSES_PUTP2("exit_underline_mode", exit_underline_mode); } if (exit_insert_mode) NCURSES_PUTP2("exit_insert_mode", exit_insert_mode); if (enter_am_mode && exit_am_mode) { if (auto_right_margin) { NCURSES_PUTP2("enter_am_mode", enter_am_mode); } else { NCURSES_PUTP2("exit_am_mode", exit_am_mode); } } } #if NCURSES_SP_FUNCS NCURSES_EXPORT(void) _nc_screen_resume(void) { NCURSES_SP_NAME(_nc_screen_resume) (CURRENT_SCREEN); } #endif NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_screen_init) (NCURSES_SP_DCL0) { NCURSES_SP_NAME(_nc_screen_resume) (NCURSES_SP_ARG); } #if NCURSES_SP_FUNCS NCURSES_EXPORT(void) _nc_screen_init(void) { NCURSES_SP_NAME(_nc_screen_init) (CURRENT_SCREEN); } #endif /* wrap up screen handling */ NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_screen_wrap) (NCURSES_SP_DCL0) { if (SP_PARM != 0) { UpdateAttrs(SP_PARM, normal); #if NCURSES_EXT_FUNCS if (SP_PARM->_coloron && !SP_PARM->_default_color) { static const NCURSES_CH_T blank = NewChar(BLANK_TEXT); SP_PARM->_default_color = TRUE; NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx -1, 0, FALSE, NCURSES_SP_NAME(_nc_outch)); SP_PARM->_default_color = FALSE; TINFO_MVCUR(NCURSES_SP_ARGx SP_PARM->_cursrow, SP_PARM->_curscol, screen_lines(SP_PARM) - 1, 0); ClrToEOL(NCURSES_SP_ARGx blank, TRUE); } #endif if (SP_PARM->_color_defs) { NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_ARG); } } } #if NCURSES_SP_FUNCS NCURSES_EXPORT(void) _nc_screen_wrap(void) { NCURSES_SP_NAME(_nc_screen_wrap) (CURRENT_SCREEN); } #endif #if USE_XMC_SUPPORT NCURSES_EXPORT(void) NCURSES_SP_NAME(_nc_do_xmc_glitch) (NCURSES_SP_DCLx attr_t previous) { if (SP_PARM != 0) { attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP_PARM))); while (chg != 0) { if (chg & 1) { SP_PARM->_curscol += magic_cookie_glitch; if (SP_PARM->_curscol >= SP_PARM->_columns) wrap_cursor(NCURSES_SP_ARG); TR(TRACE_UPDATE, ("bumped to %d,%d after cookie", SP_PARM->_cursrow, SP_PARM->_curscol)); } chg >>= 1; } } } #if NCURSES_SP_FUNCS NCURSES_EXPORT(void) _nc_do_xmc_glitch(attr_t previous) { NCURSES_SP_NAME(_nc_do_xmc_glitch) (CURRENT_SCREEN, previous); } #endif #endif /* USE_XMC_SUPPORT */