From 0e3d540892016a47f6a68ec9ba2879d35ce5f7c2 Mon Sep 17 00:00:00 2001 From: Peter Wemm Date: Tue, 24 Aug 1999 01:06:48 +0000 Subject: Import unmodified (but trimmed) ncurses 5.0 prerelease 990821. This contains the full eti (panel, form, menu) extensions. bmake glue to follow. Obtained from: ftp://ftp.clark.net/pub/dickey/ncurses --- contrib/ncurses/ncurses/tty/tty_update.c | 1738 ++++++++++++++++++++++++++++++ 1 file changed, 1738 insertions(+) create mode 100644 contrib/ncurses/ncurses/tty/tty_update.c (limited to 'contrib/ncurses/ncurses/tty/tty_update.c') diff --git a/contrib/ncurses/ncurses/tty/tty_update.c b/contrib/ncurses/ncurses/tty/tty_update.c new file mode 100644 index 000000000000..4118d357f561 --- /dev/null +++ b/contrib/ncurses/ncurses/tty/tty_update.c @@ -0,0 +1,1738 @@ +/**************************************************************************** + * Copyright (c) 1998 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 * + ****************************************************************************/ + + +/*----------------------------------------------------------------- + * + * 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). + * + *-----------------------------------------------------------------*/ + +#include + +#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 +#include +#include +#elif HAVE_SELECT +#if HAVE_SYS_SELECT_H +#include +#endif +#endif + +#ifdef __BEOS__ +/* BeOS select() only works on sockets. Use the tty hack instead */ +#include +#define select check_select +#endif + +#include + +MODULE_ID("$Id: tty_update.c,v 1.111 1999/02/27 20:07:56 tom 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 + +/* + * 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 int InsStr( chtype *line, int count ); +static void ClearScreen( chtype blank ); +static void ClrUpdate( void ); +static void DelChar( int count ); +static void TransformLine( int const lineno ); + +#ifdef POSITION_DEBUG +/**************************************************************************** + * + * Debugging code. Only works on ANSI-standard terminals. + * + ****************************************************************************/ + +void position_check(int expected_y, int expected_x, char *legend) +/* check to see if the real cursor position matches the virtual */ +{ + static char buf[9]; + int y, x; + + if (_nc_tracing) + return; + + memset(buf, '\0', sizeof(buf)); + (void) write(1, "\033[6n", 4); /* only works on ANSI-compatibles */ + (void) read(0, (void *)buf, 8); + _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 (y - 1 != expected_y || x - 1 != expected_x) + _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); +} +#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)); + +#ifdef POSITION_DEBUG + position_check(SP->_cursrow, SP->_curscol, "GoTo"); +#endif /* POSITION_DEBUG */ + + /* + * 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; +} + +static inline void PutAttrChar(chtype ch) +{ + if (tilde_glitch && (TextOf(ch) == '~')) + ch = ('`' | AttrOf(ch)); + + TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)", + _tracechtype(ch), + SP->_cursrow, SP->_curscol)); + UpdateAttrs(ch); + putc((int)TextOf(ch), SP->_ofp); +#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 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; + fflush(SP->_ofp); + } + 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); + + 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--; + } +} + +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(); + +#ifdef POSITION_DEBUG + position_check(SP->_cursrow, SP->_curscol, "PutChar"); +#endif /* POSITION_DEBUG */ +} + +/* + * 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_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_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; + int cost = min(SP->_cup_ch_cost, SP->_hpa_ch_cost); + + TR(TRACE_CHARPUT, ("PutRange(%p, %p, %d, %d, %d)", + otext, ntext, row, first, last)); + + if (otext != ntext + && (last-first+1) > cost) { + for (j = first, run = 0; j <= last; j++) { + if (otext[j] == ntext[j]) { + run++; + } else { + if (run > 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 + +#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; + } + + T(("At (%d, %d): from %s...", i, j, _traceattr(rattr))); + T(("...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; + T(("Range attributed with %s ends at (%d, %d)", + _traceattr(turnon),m,n)); + goto foundit; + } + } + n = 0; + } + T(("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; + + T(("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 + { + T(("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 ? */ + T(("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); + + T(("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); + + fflush(SP->_ofp); + curscr->_attrs = newscr->_attrs; +/* curscr->_bkgd = newscr->_bkgd; */ + +#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); + + T(("ClrUpdate() called")); + + ClearScreen(blank); + + T(("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) +{ +int j; +bool needclear = FALSE; + + for (j = SP->_curscol; j < screen_columns; j++) + { + chtype *cp = &(curscr->_line[SP->_cursrow].text[j]); + + if (*cp != blank) + { + *cp = blank; + 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; + + UpdateAttrs(blank); + TPUTS_TRACE("clr_eos"); + row = SP->_cursrow; + tputs(clr_eos, screen_lines-row, _nc_outch); + + for (col = SP->_curscol; col < screen_columns; col++) + 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) +{ +static chtype *tstLine; +static size_t lenLine; + +int row, col; +int top = total; +int last = min(screen_columns, newscr->_maxx+1); +size_t length = sizeof(chtype) * last; +chtype blank = newscr->_line[total-1].text[last-1]; /* lower right char */ + + if(!clr_eos || !can_clear_with(blank)) + return total; + + if ((tstLine == 0) || (last > (int)lenLine)) { + tstLine = typeRealloc(chtype, last, tstLine); + } + + if (tstLine != 0) { + lenLine = last; + for (col = 0; col < last; col++) + tstLine[col] = blank; + + for (row = total-1; row >= 0; row--) { + if (memcmp(tstLine, newscr->_line[row].text, length)) + break; + if (memcmp(tstLine, curscr->_line[row].text, length)) + 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]; + } + } + } +#if NO_LEAKS + if (tstLine != 0) + FreeAndNull(tstLine); +#endif + 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; + + T(("TransformLine(%d) called", lineno)); + + /* copy new hash value to old one */ + if (SP->oldhash && SP->newhash) + SP->oldhash[lineno] = SP->newhash[lineno]; + + 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)); + 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); + } 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); + } 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); + } 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; + + T(("ClearScreen() called")); + + if (clear_screen) { + UpdateAttrs(blank); + TPUTS_TRACE("clear_screen"); + putp(clear_screen); + SP->_cursrow = SP->_curscol = 0; +#ifdef POSITION_DEBUG + position_check(SP->_cursrow, SP->_curscol, "ClearScreen"); +#endif /* POSITION_DEBUG */ + } 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; + + for (i = 0; i < screen_lines; i++) { + GoTo(i, 0); + UpdateAttrs(blank); + TPUTS_TRACE("clr_eol"); + putp(clr_eol); + } + GoTo(0,0); + } else { + T(("cannot clear screen")); + return; + } + + for (i = 0; i < screen_lines; i++) { + for (j = 0; j < screen_columns; j++) + curscr->_line[i].text[j] = blank; + } + + T(("screen cleared")); +} + +/* +** InsStr(line, count) +** +** Insert the count characters pointed to by line. +** +*/ + +static int InsStr(chtype *line, int count) +{ + T(("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--; + } + return(OK); + } 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); + return(OK); + } else { + while (count) { + TPUTS_TRACE("insert_character"); + putp(insert_character); + PutAttrChar(*line); + if (insert_padding) + { + TPUTS_TRACE("insert_padding"); + putp(insert_padding); + } + line++; + count--; + } + return(OK); + } +} + +/* +** DelChar(count) +** +** Delete count characters at current position +** +*/ + +static void DelChar(int count) +{ + T(("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 { + while (count--) + { + TPUTS_TRACE("delete_character"); + putp(delete_character); + } + } +} + +/* +** _nc_outstr(char *str) +** +** Emit a string without waiting for update. +*/ + +void _nc_outstr(const char *str) +{ + FILE *ofp = SP ? SP->_ofp : stdout; + + (void) fputs(str, ofp); + (void) fflush(ofp); + +#ifdef TRACE + _nc_outchars += strlen(str); +#endif /* TRACE */ +} + +/* + * 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; + + 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; + + 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; + + 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; + + 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. + */ + if (non_dest_scroll_region || (memory_above && top == 0)) { + for (i = 0; i < n; i++) + { + GoTo(i, 0); + ClrToEOL(BLANK); + } + } + + 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); + } + else /* (n < 0) - scroll down (backward) */ + { + /* + * Do explicit clear to end of region if it's possible that the + * terminal might hold on to stuff we push off the end. + */ + if (non_dest_scroll_region || (memory_below && bot == maxy)) + { + if (bot == maxy && clr_eos) + { + GoTo(maxy + n, 0); + ClrToEOS(BLANK); + } + else if (clr_eol) + { + for (i = 0; i < -n; i++) + { + GoTo(maxy + n + i, 0); + ClrToEOL(BLANK); + } + } + } + + 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); + } + + 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() +{ + /* 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() +{ + _nc_screen_resume(); +} + +/* wrap up screen handling */ +void _nc_screen_wrap() +{ + UpdateAttrs(A_NORMAL); +} + +#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(); + T(("bumped to %d,%d after cookie", SP->_cursrow, SP->_curscol)); + } + chg >>= 1; + } +} +#endif /* USE_XMC_SUPPORT */ -- cgit v1.2.3