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/*************************************************************************** * This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne. JOVE * * is provided to you without charge, and with no warranty. You may give * * away copies of JOVE, including sources, provided that this notice is * * included in all the files. * ***************************************************************************/ #include "jove.h" #include "ctype.h" #include "termcap.h" #include "chars.h" #include "fp.h" #include "disp.h" #if defined(IPROCS) # include "iproc.h" #endif #ifdef MAC # include "mac.h" #else # ifdef STDARGS # include <stdarg.h> # else # include <varargs.h> # endif # include <sys/stat.h> #endif #include <signal.h> private void #ifdef ID_CHAR DeTab proto((int, char *, char *, size_t, int)), DelChar proto((int, int, int)), InsChar proto((int, int, int, char *)), #endif DoIDline proto((int)), do_cl_eol proto((int)), ModeLine proto((Window *)), GotoDot proto((void)), UpdLine proto((int)), UpdWindow proto((Window *, int)); #ifdef MSDOS extern void dobell proto((int x)); #else private void dobell proto((int x)); #endif private int #ifdef ID_CHAR IDchar proto ((char *, int, int)), NumSimilar proto ((char *, char *, int)), IDcomp proto ((char *, char *, int)), OkayDelete proto ((int, int, int)), OkayInsert proto ((int, int)), #endif AddLines proto((int, int)), DelLines proto((int, int)), UntilEqual proto((int)); int DisabledRedisplay = NO; /* Kludge windows gets called by the routines that delete lines from the buffer. If the w->w_line or w->w_top are deleted and this procedure is not called, the redisplay routine will barf. */ void ChkWindows(line1, line2) Line *line1; register Line *line2; { register Window *w = fwind; register Line *lp; do { for (lp = line1->l_next; lp != line2->l_next; lp = lp->l_next) { if (lp == w->w_top) w->w_flags |= W_TOPGONE; if (lp == w->w_line) w->w_flags |= W_CURGONE; } w = w->w_next; } while (w != fwind); } private int RingBell; /* So if we have a lot of errors ... ring the bell only ONCE */ void redisplay() { register Window *w = fwind; int lineno, done_ID = NO, i; register struct scrimage *des_p, *phys_p; if (DisabledRedisplay == YES) return; curwind->w_line = curwind->w_bufp->b_dot; curwind->w_char = curwind->w_bufp->b_char; #ifdef MAC InputPending = 0; #else if ((InputPending = charp()) != '\0') /* calls CheckEvent, which could */ return; /* result in a call to rediplay(). We don't want that. */ #endif #ifdef JOB_CONTROL if (UpdFreq) SigHold(SIGALRM); #endif if (RingBell) { dobell(1); RingBell = 0; } AbortCnt = BufSize; /* initialize this now */ if (UpdMesg) DrawMesg(YES); for (lineno = 0, w = fwind; lineno < ILI; w = w->w_next) { UpdWindow(w, lineno); lineno += w->w_height; } UpdModLine = 0; /* Now that we've called update window, we can assume that the modeline will be updated. But if while redrawing the modeline the user types a character, ModeLine() is free to set this on again so that the modeline will be fully drawn at the next redisplay. */ des_p = DesiredScreen; phys_p = PhysScreen; for (i = 0; i < ILI; i++, des_p++, phys_p++) { if (!done_ID && (des_p->s_id != phys_p->s_id)) { DoIDline(i); done_ID = YES; } if ((des_p->s_flags & (DIRTY | L_MOD)) || (des_p->s_id != phys_p->s_id) || (des_p->s_vln != phys_p->s_vln) || (des_p->s_offset != phys_p->s_offset)) UpdLine(i); if (InputPending) goto ret; } if (Asking) { Placur(LI - 1, min(CO - 2, calc_pos(mesgbuf, Asking))); /* Nice kludge */ flusho(); } else GotoDot(); ret: #ifdef JOB_CONTROL if (UpdFreq) SigRelse(SIGALRM); #else ; /* yuck */ #endif #ifdef MAC if(Windchange) docontrols(); #endif /* MAC */ } #ifndef IBMPC private void dobell(n) int n; { if (NoBell) return; while (--n >= 0) { #ifndef MAC if (VisBell && VB) putstr(VB); else putpad(BL, 1); #else SysBeep(5); #endif } flusho(); } #endif /* IBMPC */ /* find_pos() returns the position on the line, that C_CHAR represents in LINE */ int find_pos(line, c_char) Line *line; int c_char; { return calc_pos(lcontents(line), c_char); } int calc_pos(lp, c_char) register char *lp; register int c_char; { register int pos = 0; register int c; while ((--c_char >= 0) && ((c = *lp++) & CHARMASK) != 0) { if (c == '\t') pos += (tabstop - (pos % tabstop)); else if (isctrl(c)) pos += 2; else pos += 1; } return pos; } int UpdModLine = 0, UpdMesg = 0; private void DoIDline(start) int start; { register struct scrimage *des_p = &DesiredScreen[start]; struct scrimage *phys_p = &PhysScreen[start]; register int i, j; /* Some changes have been made. Try for insert or delete lines. If either case has happened, Addlines and/or DelLines will do necessary scrolling, also CONVERTING PhysScreen to account for the physical changes. The comparison continues from where the insertion/deletion takes place; this doesn't happen very often, usually it happens with more than one window with the same buffer. */ if (!CanScroll) return; /* We should never have been called! */ for (i = start; i < ILI; i++, des_p++, phys_p++) if (des_p->s_id != phys_p->s_id) break; for (; i < ILI; i++) { for (j = i + 1; j < ILI; j++) { des_p = &DesiredScreen[j]; phys_p = &PhysScreen[j]; if (des_p->s_id != 0 && des_p->s_id == phys_p->s_id) break; if (des_p->s_id == PhysScreen[i].s_id) { if (des_p->s_id == 0) continue; if (AddLines(i, j - i)) { DoIDline(j); return; } break; } if ((des_p = &DesiredScreen[i])->s_id == phys_p->s_id) { if (des_p->s_id == 0) continue; if (DelLines(i, j - i)) { DoIDline(i); return; } break; } } } } /* Make DesiredScreen reflect what the screen should look like when we are done with the redisplay. This deals with horizontal scrolling. Also makes sure the current line of the Window is in the window. */ int ScrollAll = NO; private void UpdWindow(w, start) register Window *w; int start; { Line *lp; int i, upper, /* top of window */ lower, /* bottom of window */ strt_col, /* starting print column of current line */ ntries = 0; /* # of tries at updating window */ register struct scrimage *des_p, *phys_p; Buffer *bp = w->w_bufp; retry: if (w->w_flags & W_CURGONE) { w->w_line = bp->b_dot; w->w_char = bp->b_char; } if (w->w_flags & W_TOPGONE) CentWind(w); /* reset topline of screen */ w->w_flags &= ~(W_CURGONE | W_TOPGONE); /* make sure that the current line is in the window */ upper = start; lower = upper + w->w_height - 1; /* don't include modeline */ for (i = upper, lp = w->w_top; i < lower && lp != 0; lp = lp->l_next, i++) if (lp == w->w_line) break; if (i == lower || lp == 0) { ntries += 1; if (ntries == 1) { CalcWind(w); goto retry; } else if (ntries == 2) { w->w_top = w->w_line = w->w_bufp->b_first; writef("\rERROR in redisplay: I got hopelessly lost!"); dobell(2); goto retry; } else if (ntries == 3) { writef("\n\rOops, still lost, quitting ...\r\n"); finish(1); } } /* first do some calculations for the current line */ { int diff = (w->w_flags & W_NUMLINES) ? 8 : 0, end_col; strt_col = (ScrollAll == YES) ? w->w_LRscroll : PhysScreen[i].s_offset; end_col = strt_col + (CO - 2) - diff; /* Right now we are displaying from strt_col to end_col of the buffer line. These are PRINT columns, not actual characters. */ w->w_dotcol = find_pos(w->w_line, w->w_char); /* if the new dotcol is out of range, reselect a horizontal window */ if ((PhysScreen[i].s_offset == -1) || (w->w_dotcol < strt_col) || (w->w_dotcol >= end_col)) { if (w->w_dotcol < ((CO - 2) - diff)) strt_col = 0; else strt_col = w->w_dotcol - (CO / 2); if (ScrollAll == YES) { if (w->w_LRscroll != strt_col) UpdModLine = YES; w->w_LRscroll = strt_col; } } w->w_dotline = i; w->w_dotcol += diff; } des_p = &DesiredScreen[upper]; phys_p = &PhysScreen[upper]; for (i = upper, lp = w->w_top; lp != 0 && i < lower; i++, des_p++, phys_p++, lp = lp->l_next) { des_p->s_window = w; des_p->s_lp = lp; des_p->s_id = lp->l_dline & ~DIRTY; des_p->s_flags = isdirty(lp) ? L_MOD : 0; if (w->w_flags & W_NUMLINES) des_p->s_vln = w->w_topnum + (i - upper); else des_p->s_vln = 0; if (lp == w->w_line) des_p->s_offset = strt_col; else des_p->s_offset = w->w_LRscroll; } /* Is structure assignment faster than copy each field separately? */ if (i < lower) { static const struct scrimage dirty_plate = { 0, DIRTY, 0, 0, 0, 0 }, clean_plate = { 0, 0, 0, 0, 0, 0 }; for (; i < lower; i++, des_p++, phys_p++) if (phys_p->s_id != 0) *des_p = dirty_plate; else *des_p = clean_plate; } des_p->s_window = w; des_p->s_flags = 0; if (((des_p->s_id = (int) w->w_bufp) != phys_p->s_id) || UpdModLine) des_p->s_flags = MODELINE | DIRTY; #ifdef MAC if (UpdModLine) Modechange = 1; if (w == curwind && w->w_control) SetScrollBar(w->w_control); #endif } /* Write whatever is in mesgbuf (maybe we are Asking, or just printed a message). Turns off the UpdateMesg line flag. */ void DrawMesg(abortable) int abortable; { #ifndef MAC /* same reason as in redisplay() */ if (charp()) return; #endif i_set(ILI, 0); if (swrite(mesgbuf, NO, abortable)) { cl_eol(); UpdMesg = 0; } flusho(); } /* Goto the current position in the current window. Presumably redisplay() has already been called, and curwind->{w_dotline,w_dotcol} have been set correctly. */ private void GotoDot() { if (InputPending) return; Placur(curwind->w_dotline, curwind->w_dotcol - PhysScreen[curwind->w_dotline].s_offset); flusho(); } private int UntilEqual(start) register int start; { register struct scrimage *des_p = &DesiredScreen[start], *phys_p = &PhysScreen[start]; while ((start < ILI) && (des_p->s_id != phys_p->s_id)) { des_p += 1; phys_p += 1; start += 1; } return start; } /* Calls the routine to do the physical changes, and changes PhysScreen to reflect those changes. */ private int AddLines(at, num) register int at, num; { register int i; int bottom = UntilEqual(at + num); if (num == 0 || num >= ((bottom - 1) - at)) return NO; /* we did nothing */ v_ins_line(num, at, bottom - 1); /* Now change PhysScreen to account for the physical change. */ for (i = bottom - 1; i - num >= at; i--) PhysScreen[i] = PhysScreen[i - num]; for (i = 0; i < num; i++) PhysScreen[at + i].s_id = 0; return YES; /* we did something */ } private int DelLines(at, num) register int at, num; { register int i; int bottom = UntilEqual(at + num); if (num == 0 || num >= ((bottom - 1) - at)) return NO; v_del_line(num, at, bottom - 1); for (i = at; num + i < bottom; i++) PhysScreen[i] = PhysScreen[num + i]; for (i = bottom - num; i < bottom; i++) PhysScreen[i].s_id = 0; return YES; } /* Update line linenum in window w. Only set PhysScreen to DesiredScreen if the swrite or cl_eol works, that is nothing is interupted by characters typed. */ private void UpdLine(linenum) register int linenum; { register struct scrimage *des_p = &DesiredScreen[linenum]; register Window *w = des_p->s_window; i_set(linenum, 0); if (des_p->s_flags & MODELINE) ModeLine(w); else if (des_p->s_id) { des_p->s_lp->l_dline &= ~DIRTY; des_p->s_flags &= ~(DIRTY | L_MOD); #ifdef ID_CHAR if (!UseIC && (w->w_flags & W_NUMLINES)) #else if (w->w_flags & W_NUMLINES) #endif (void) swrite(sprint("%6d ", des_p->s_vln), NO, YES); #ifdef ID_CHAR if (UseIC) { char outbuf[MAXCOLS], *lptr; int fromcol = (w->w_flags & W_NUMLINES) ? 8 : 0; if (w->w_flags & W_NUMLINES) swritef(outbuf, "%6d ", des_p->s_vln); lptr = lcontents(des_p->s_lp); DeTab(des_p->s_offset, lptr, outbuf + fromcol, (sizeof outbuf) - 1 - fromcol, des_p->s_window->w_flags & W_VISSPACE); if (IDchar(outbuf, linenum, 0)) PhysScreen[linenum] = *des_p; else if (i_set(linenum, 0), swrite(outbuf, NO, YES)) do_cl_eol(linenum); else PhysScreen[linenum].s_id = -1; } else #endif /* ID_CHAR */ if (BufSwrite(linenum)) do_cl_eol(linenum); else PhysScreen[linenum].s_id = -1; } else if (PhysScreen[linenum].s_id) /* not the same ... make sure */ do_cl_eol(linenum); } private void do_cl_eol(linenum) register int linenum; { cl_eol(); PhysScreen[linenum] = DesiredScreen[linenum]; } #ifdef ID_CHAR /* From here to the end of the file is code that tries to utilize the insert/delete character feature on some terminals. It is very confusing and not so well written code, AND there is a lot of it. You may want to use the space for something else. */ int IN_INSmode = 0; int UseIC; int DClen, MDClen, IClen, MIClen, IMlen, CElen; void disp_opt_init() { DClen = DC ? strlen(DC) : 0; MDClen = M_DC ? strlen(M_DC) : 9999; IClen = IC ? strlen(IC) : 0; MIClen = M_IC ? strlen(M_IC) : 9999; IMlen = IM ? strlen(IM) : 0; CElen = CE ? strlen(CE) : 0; UseIC = (IC || IM || M_IC); } void INSmode(on) int on; { if (on && !IN_INSmode) { putpad(IM, 1); IN_INSmode = YES; } else if (!on && IN_INSmode) { putpad(EI, 1); IN_INSmode = NO; } } private void DeTab(s_offset, buf, outbuf, limit, visspace) int s_offset; register char *buf; char *outbuf; size_t limit; int visspace; { register char *phys_p = outbuf, c; register int pos = 0; char *limitp = &outbuf[limit]; #define OkayOut(ch) { \ if ((pos++ >= s_offset) && (phys_p < limitp)) \ *phys_p++ = (ch); \ } while ((c = *buf++) != '\0') { if (c == '\t') { int nchars = (tabstop - (pos % tabstop)); if (visspace) { OkayOut('>'); nchars -= 1; } while (--nchars >= 0) OkayOut(' '); } else if (isctrl(c)) { OkayOut('^'); OkayOut(c == 0177 ? '?' : c + '@'); } else { if (visspace && c == ' ') c = '_'; OkayOut(c); } if (pos - s_offset >= CO) { phys_p = &outbuf[CO - 1]; *phys_p++ = '!'; break; } } *phys_p = 0; #undef OkayOut } /* ID character routines full of special cases and other fun stuff like that. It actually works though ... Returns Non-Zero if you are finished (no differences left). */ private int IDchar(new, lineno, col) register char *new; int lineno, col; { register int i; int j, oldlen, NumSaved; register struct screenline *sline = &Screen[lineno]; oldlen = sline->s_length - sline->s_line; for (i = col; i < oldlen && new[i] != 0; i++) if (sline->s_line[i] != new[i]) break; if (new[i] == 0 || i == oldlen) return (new[i] == 0 && i == oldlen); for (j = i + 1; j < oldlen && new[j]; j++) { if (new[j] == sline->s_line[i]) { NumSaved = IDcomp(new + j, sline->s_line + i, (int)strlen(new)) + NumSimilar(new + i, sline->s_line + i, j - i); if (OkayInsert(NumSaved, j - i)) { InsChar(lineno, i, j - i, new); return(IDchar(new, lineno, j)); } } } for (j = i + 1; j < oldlen && new[i]; j++) { if (new[i] == sline->s_line[j]) { NumSaved = IDcomp(new + i, sline->s_line + j, oldlen - j); if (OkayDelete(NumSaved, j - i, new[oldlen] == 0)) { DelChar(lineno, i, j - i); return(IDchar(new, lineno, j)); } } } return 0; } private int NumSimilar(s, t, n) register char *s, *t; int n; { register int num = 0; while (n--) if (*s++ == *t++) num += 1; return num; } private int IDcomp(s, t, len) register char *s, *t; int len; { register int i; int num = 0, nonspace = 0; char c; for (i = 0; i < len; i++) { if ((c = *s++) != *t++) break; if (c != ' ') nonspace++; if (nonspace) num += 1; } return num; } private int OkayDelete(Saved, num, samelength) int Saved, num, samelength; { /* If the old and the new are the same length, then we don't * have to clear to end of line. We take that into consideration. */ return ((Saved + (!samelength ? CElen : 0)) > min(MDClen, DClen * num)); } private int OkayInsert(Saved, num) int Saved, num; { register int n = 0; if (IC) /* Per character prefixes */ n = min(num * IClen, MIClen); if (IM && !IN_INSmode) { /* Good terminal. Fewer characters in this case */ n += IMlen; } n += num; /* The characters themselves */ return Saved > n; } private void DelChar(lineno, col, num) int lineno, col, num; { register char *from, *to; register int i; struct screenline *sp = (&Screen[lineno]); Placur(lineno, col); if (M_DC && num > 1) { putargpad(M_DC, num, num); } else { for (i = num; --i >= 0; ) putpad(DC, 1); } to = sp->s_line + col; from = to + num; byte_copy(from, to, (size_t) (sp->s_length - from + 1)); clrline(sp->s_length - num, sp->s_length); sp->s_length -= num; } private void InsChar(lineno, col, num, new) int lineno, col, num; char *new; { register char *sp1, *sp2, /* To push over the array. */ *sp3; /* Last character to push over. */ int i; i_set(lineno, 0); sp2 = Curline->s_length + num; if (sp2 >= cursend) { i_set(lineno, CO - num - 1); cl_eol(); sp2 = cursend - 1; } Curline->s_length = sp2; sp1 = sp2 - num; sp3 = Curline->s_line + col; while (sp1 >= sp3) *sp2-- = *sp1--; new += col; byte_copy(new, sp3, (size_t) num); /* The internal screen is correct, and now we have to do the physical stuff. */ Placur(lineno, col); if (IM) { if (!IN_INSmode) INSmode(1); } else if (M_IC && num > 1) { putargpad(M_IC, num, num); } else if (IC) { for (i = 0; i < num; i++) putpad(IC, 1); } for (i = 0; i < num; i++) { jputchar(new[i]); if (IN_INSmode) putpad(IP, 1); } CapCol += num; } #endif /* ID_CHAR */ #ifdef UNIX /* obviously ... no mail today if not Unix*/ /* chkmail() returns nonzero if there is new mail since the last time we checked. */ char Mailbox[FILESIZE]; /* initialized in main */ int MailInt = 60; /* check no more often than 60 seconds */ #ifdef BIFF int BiffChk = NO; /* whether to turn off biff while in JOVE */ #endif int chkmail(force) int force; { time_t now; static int state = NO; /* assume unknown */ static time_t last_chk = 0, mbox_time = 0; struct stat stbuf; if (MailInt == 0) return NO; time(&now); if ((force == NO) && (now < last_chk + MailInt)) return state; last_chk = now; if (stat(Mailbox, &stbuf) < 0) { state = NO; /* no mail */ return NO; } if (((stbuf.st_atime > stbuf.st_mtime) && (stbuf.st_atime > mbox_time)) || (stbuf.st_size == 0)) { mbox_time = stbuf.st_atime; state = NO; } else if (stbuf.st_mtime > mbox_time) { if (mbox_time > 0) dobell(2); /* announce the change */ mbox_time = stbuf.st_mtime; state = YES; } return state; } #endif /* UNIX */ /* Print the mode line. */ private char *mode_p, *mend_p; int BriteMode = 1; /* modeline should standout */ private void mode_app(str) register const char *str; { while ((mode_p < mend_p) && (*mode_p++ = *str++)!='\0') ; mode_p -= 1; /* back over the null */ } char ModeFmt[120] = "%3c %w %[%sJOVE (%M) Buffer: %b \"%f\" %]%s%m*- %((%t)%s%)%e"; private void ModeLine(w) register Window *w; { int n, ign_some = NO, glue = 0; char line[MAXCOLS], *fmt = ModeFmt, fillc, c; register Buffer *thisbuf = w->w_bufp; register Buffer *bp; mode_p = line; mend_p = &line[(sizeof line) - 1]; #ifdef IBMPC /* very subtle - don't mess up attributes too much */ fillc = '-'; #else /* !IBMPC */ # ifdef MAC fillc = '_'; /* looks better on a Mac */ # else /* !MAC */ if (SO == 0) BriteMode = 0; fillc = BriteMode ? ' ' : '-'; # endif /* !MAC */ #endif /* !IBMPC */ while ((c = *fmt++)!='\0' && mode_p<mend_p) { if (c != '%') { if (c == '\\') if ((c = *fmt++) == '\0') break; if (!ign_some) *mode_p++ = c; continue; } if ((c = *fmt++) == '\0') /* char after the '%' */ break; if (ign_some && c != ')') continue; n = 1; if (c >= '0' && c <= '9') { n = 0; while (c >= '0' && c <= '9') { n = n * 10 + (c - '0'); c = *fmt++; } if (c == '\0') break; } switch (c) { case '(': if (w->w_next != fwind) /* Not bottom window. */ ign_some = YES; break; case ')': ign_some = NO; break; case '[': case ']': for (n=RecDepth; n>0 && mode_p<mend_p; n--) *mode_p++ = c; break; #ifdef UNIX case 'C': /* check mail here */ if (chkmail(NO) == YES) mode_app("[New mail]"); break; #endif /* UNIX */ case 'M': { static const char *const mmodes[] = { "Fundamental ", "Text ", "C ", #ifdef LISP "Lisp ", #endif 0 }; mode_app(mmodes[thisbuf->b_major]); if (BufMinorMode(thisbuf, Fill)) mode_app("Fill "); if (BufMinorMode(thisbuf, Abbrev)) mode_app("Abbrev "); if (BufMinorMode(thisbuf, OverWrite)) mode_app("OvrWt "); if (BufMinorMode(thisbuf, Indent)) mode_app("AI "); if (BufMinorMode(thisbuf, ReadOnly)) mode_app("RO "); if (InMacDefine) mode_app("Def "); mode_p -= 1; /* Back over the extra space. */ break; } case 'c': while (--n>=0 && mode_p<mend_p) *mode_p++ = fillc; break; case 'd': /* print working directory */ mode_app(pr_name(pwd(), YES)); break; case 'e': /* stretchable glue */ *mode_p++ = '\0'; /* glue marker */ glue++; break; case 'b': mode_app(thisbuf->b_name); break; case 'f': case 'F': if (thisbuf->b_fname == 0) mode_app("[No file]"); else { if (c == 'f') mode_app(pr_name(thisbuf->b_fname, YES)); else mode_app(basename(thisbuf->b_fname)); } break; #ifdef LOAD_AV case 'l': { double theavg; char minibuf[10]; get_la(&theavg); theavg += .005; /* round to nearest .01 */ swritef(minibuf, "%d.%02d", (int) theavg, (int)((theavg - (int) theavg) * 100)); mode_app(minibuf); break; } #endif case 'm': { char yea = (*fmt == '\0') ? '*' : *fmt++; char nay = (*fmt == '\0') ? ' ' : *fmt++; *mode_p++ = IsModified(w->w_bufp) ? yea : nay; break; } case 'n': { char tmp[16]; for (bp = world, n = 1; bp != 0; bp = bp->b_next, n++) if (bp == thisbuf) break; swritef(tmp, "%d", n); mode_app(tmp); break; } #ifdef IPROCS case 'p': if (thisbuf->b_type == B_PROCESS) { char tmp[40]; Process *p = thisbuf->b_process; swritef(tmp, "(%s%s)", ((p == 0 || p->p_dbx_mode == NO) ? "" : "DBX "), ((p == 0) ? "No process" : pstate(p))); mode_app(tmp); } break; #endif case 's': if (mode_p[-1] != ' ') *mode_p++ = ' '; break; case 't': { char timestr[12]; mode_app(get_time((time_t *) 0, timestr, 11, 16)); break; } case 'w': if (w->w_LRscroll > 0) mode_app(">"); break; } } /* Glue (Knuth's term) is a field that expands to fill * any leftover space. Multiple glue fields compete * on an equal basis. This is a generalization of a * mechanism to allow centring and right-justification. * The original meaning of %e (fill the rest of the * line) has also been generalized. %e can now * meaningfully be used 0 or more times. */ if (glue) { /* 2 space pad plus padding for magic cookies */ register char *to = &line[CO - 2 - (2 * SG)], *from = mode_p; if (to < from) to = from; mode_p = to; while (from != line) { if ((*--to = *--from) == '\0') { register int portion = (to-from) / glue; glue--; *to = fillc; while (--portion >= 0) *--to = fillc; } } } *mode_p = 0; /* Highlight mode line. */ if (BriteMode) { #ifdef ID_CHAR if (IN_INSmode) INSmode(0); #endif SO_on(); } if (swrite(line, BriteMode, YES)) do_cl_eol(i_line); else UpdModLine = 1; if (BriteMode) SO_off(); } private void v_clear(line1, line2) register int line1; int line2; { register struct scrimage *phys_p, *des_p; phys_p = &PhysScreen[line1]; des_p = &DesiredScreen[line1]; while (line1 <= line2) { i_set(line1, 0); cl_eol(); phys_p->s_id = des_p->s_id = 0; phys_p += 1; des_p += 1; line1 += 1; } } /* This tries to place the current line of the current window in the center of the window, OR to place it at the arg'th line of the window. This also causes the horizontal position of the line to be centered, if the line needs scrolling, or moved all the way back to the left, if that's possible. */ void RedrawDisplay() { int line; Line *newtop = prev_line((curwind->w_line = curline), is_an_arg() ? arg_value() : HALF(curwind)); if ((line = in_window(curwind, curwind->w_line)) != -1) PhysScreen[line].s_offset = -1; if (newtop == curwind->w_top) v_clear(FLine(curwind), FLine(curwind) + SIZE(curwind)); else SetTop(curwind, newtop); } void ClAndRedraw() { cl_scr(YES); } void NextPage() { Line *newline; if (Asking) return; if (arg_value() < 0) { negate_arg_value(); PrevPage(); return; } if (arg_type() == YES) UpScroll(); else { if (in_window(curwind, curwind->w_bufp->b_last) != -1) { rbell(); return; } newline = next_line(curwind->w_top, max(1, SIZE(curwind) - 1)); SetTop(curwind, curwind->w_line = newline); if (curwind->w_bufp == curbuf) SetLine(newline); } } #ifdef MSDOS /* kg */ void PageScrollUp() { int i, n; n = max(1, SIZE(curwind) - 1); for (i=0; i<n; i++) { UpScroll(); redisplay(); } } void PageScrollDown() { int i, n; n = max(1, SIZE(curwind) - 1); for (i=0; i<n; i++) { DownScroll(); redisplay(); } } #endif /* MSDOS */ void PrevPage() { Line *newline; if (Asking) return; if (arg_value() < 0) { negate_arg_value(); NextPage(); return; } if (arg_type() == YES) DownScroll(); else { newline = prev_line(curwind->w_top, max(1, SIZE(curwind) - 1)); SetTop(curwind, curwind->w_line = newline); if (curwind->w_bufp == curbuf) SetLine(newline); } } void UpScroll() { SetTop(curwind, next_line(curwind->w_top, arg_value())); if ((curwind->w_bufp == curbuf) && (in_window(curwind, curline) == -1)) SetLine(curwind->w_top); } void DownScroll() { SetTop(curwind, prev_line(curwind->w_top, arg_value())); if ((curwind->w_bufp == curbuf) && (in_window(curwind, curline) == -1)) SetLine(curwind->w_top); } int VisBell = NO; int NoBell = NO; void rbell() { RingBell = YES; } /* Message prints the null terminated string onto the bottom line of the terminal. */ void message(str) char *str; { if (InJoverc) return; UpdMesg = YES; errormsg = NO; if (str != mesgbuf) null_ncpy(mesgbuf, str, (sizeof mesgbuf) - 1); } /* End of Window */ void Eow() { if (Asking) return; SetLine(next_line(curwind->w_top, SIZE(curwind) - 1 - min(SIZE(curwind) - 1, arg_value() - 1))); if (!is_an_arg()) Eol(); } /* Beginning of Window */ void Bow() { if (Asking) return; SetLine(next_line(curwind->w_top, min(SIZE(curwind) - 1, arg_value() - 1))); } private int LineNo, last_col, DoAutoNL; private Window *old_wind; /* save the window we were in BEFORE before we were called, if UseBuffers is nonzero */ int UseBuffers = FALSE; int TOabort = 0; /* This initializes the typeout. If send-typeout-to-buffers is set the buffer NAME is created (emptied if it already exists) and output goes to the buffer. Otherwise output is drawn on the screen and erased by TOstop() */ void TOstart(name, auto_newline) char *name; int auto_newline; { if (UseBuffers) { old_wind = curwind; pop_wind(name, YES, B_SCRATCH); } else DisabledRedisplay = YES; TOabort = LineNo = last_col = 0; DoAutoNL = auto_newline; } #ifdef STDARGS void Typeout(char *fmt, ...) #else /*VARARGS1*/ void Typeout(fmt, va_alist) char *fmt; va_dcl #endif { if (TOabort) return; if (!UseBuffers && (LineNo == ILI - 1)) { register int c; LineNo = 0; last_col = 0; f_mess("--more--"); if ((c = jgetchar()) != ' ') { TOabort = YES; if (c != AbortChar && c != RUBOUT) Ungetc(c); f_mess(NullStr); return; } f_mess(NullStr); } if (fmt) { char string[132]; va_list ap; va_init(ap, fmt); format(string, sizeof string, fmt, ap); va_end(ap); if (UseBuffers) ins_str(string, NO, -1); else { i_set(LineNo, last_col); (void) swrite(string, NO, YES); last_col = i_col; } } if (!UseBuffers) { PhysScreen[LineNo].s_id = -1; if (fmt == 0 || DoAutoNL == YES) { cl_eol(); flusho(); LineNo += 1; last_col = 0; } } else if (fmt == 0 || DoAutoNL != 0) ins_str("\n", NO, -1); } void TOstop() { int c; if (UseBuffers) { ToFirst(); SetWind(old_wind); } else { if (TOabort) { DisabledRedisplay = NO; return; } if (last_col != 0) Typeout((char *) 0); Typeout("----------"); cl_eol(); flusho(); c = jgetchar(); if (c != ' ') Ungetc(c); DisabledRedisplay = NO; } }
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.