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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved. The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
- */
-
- #ifndef lint
- static char *sccsid = "@(#)ex_vget.c 6.9 (Berkeley) 3/9/87; 1.2 (Bellcore) 87/04/24";
- #endif not lint
-
- #include "ex.h"
- #include "ex_tty.h"
- #include "ex_vis.h"
-
- /*
- * Input routines for open/visual.
- * We handle upper case only terminals in visual and reading from the
- * echo area here as well as notification on large changes
- * which appears in the echo area.
- */
-
- /*
- * Return the key.
- */
- ungetkey(c)
- int c; /* mjm: char --> int */
- {
-
- if (Peek_key != ATTN)
- Peek_key = c;
- }
-
- /*
- * Return a keystroke, but never a ^@.
- */
- getkey()
- {
- register int c; /* mjm: char --> int */
-
- do {
- c = getbr();
- if (c==0)
- beep();
- } while (c == 0);
- return (c);
- }
-
- /*
- * Tell whether next keystroke would be a ^@.
- */
- peekbr()
- {
-
- Peek_key = getbr();
- return (Peek_key == 0);
- }
-
- short precbksl;
- jmp_buf readbuf;
- int doingread = 0;
-
- /*
- * Get a keystroke, including a ^@.
- * If an key was returned with ungetkey, that
- * comes back first. Next comes unread input (e.g.
- * from repeating commands with .), and finally new
- * keystrokes.
- *
- * The hard work here is in mapping of \ escaped
- * characters on upper case only terminals.
- */
- getbr()
- {
- char ch;
- register int c, d;
- register char *colp;
- #define BEEHIVE
- #ifdef BEEHIVE
- static char Peek2key;
- #endif
- extern short slevel, ttyindes;
-
- getATTN:
- if (Peek_key) {
- c = Peek_key;
- Peek_key = 0;
- return (c);
- }
- #ifdef BEEHIVE
- if (Peek2key) {
- c = Peek2key;
- Peek2key = 0;
- return (c);
- }
- #endif
- if (vglobp) {
- if (*vglobp)
- return (lastvgk = *vglobp++);
- lastvgk = 0;
- return (ESCAPE);
- }
- if (vmacp) {
- if (*vmacp)
- return(*vmacp++);
- /* End of a macro or set of nested macros */
- vmacp = 0;
- if (inopen == -1) /* don't screw up undo for esc esc */
- vundkind = VMANY;
- inopen = 1; /* restore old setting now that macro done */
- vch_mac = VC_NOTINMAC;
- }
- flusho();
- again:
- if (setjmp(readbuf))
- goto getATTN;
- doingread = 1;
- #ifndef vms
- c = read(slevel == 0 ? 0 : ttyindes, &ch, 1);
- #else
- c = vms_read(slevel == 0 ? 0 : ttyindes, &ch, 1);
- #endif
- doingread = 0;
- if (c != 1) {
- if (errno == EINTR)
- goto getATTN;
- error("Input read error");
- }
- c = ch & TRIM;
- #ifdef BEEHIVE
- if (XB && slevel==0 && c == ESCAPE) {
- if (read(0, &Peek2key, 1) != 1)
- goto getATTN;
- Peek2key &= TRIM;
- switch (Peek2key) {
- case 'C': /* SPOW mode sometimes sends \EC for space */
- c = ' ';
- Peek2key = 0;
- break;
- case 'q': /* f2 -> ^C */
- c = CTRL(c);
- Peek2key = 0;
- break;
- case 'p': /* f1 -> esc */
- Peek2key = 0;
- break;
- }
- }
- #endif
-
- #ifdef UCVISUAL
- /*
- * The algorithm here is that of the UNIX kernel.
- * See the description in the programmers manual.
- */
- if (UPPERCASE) {
- if (isupper(c))
- c = tolower(c);
- if (c == '\\') {
- if (precbksl < 2)
- precbksl++;
- if (precbksl == 1)
- goto again;
- } else if (precbksl) {
- d = 0;
- if (islower(c))
- d = toupper(c);
- else {
- colp = "({)}!|^~'~";
- while (d = *colp++)
- if (d == c) {
- d = *colp++;
- break;
- } else
- colp++;
- }
- if (precbksl == 2) {
- if (!d) {
- Peek_key = c;
- precbksl = 0;
- c = '\\';
- }
- } else if (d)
- c = d;
- else {
- Peek_key = c;
- precbksl = 0;
- c = '\\';
- }
- }
- if (c != '\\')
- precbksl = 0;
- }
- #endif
- #ifdef TRACE
- if (trace) {
- if (!techoin) {
- tfixnl();
- techoin = 1;
- fprintf(trace, "*** Input: ");
- }
- tracec(c);
- }
- #endif
- lastvgk = 0;
- return (c);
- }
-
- /*
- * Get a key, but if a delete, quit or attention
- * is typed return 0 so we will abort a partial command.
- */
- getesc()
- {
- register int c;
-
- c = getkey();
- switch (c) {
-
- case CTRL(v):
- case CTRL(q):
- c = getkey();
- return (c);
-
- case ATTN:
- case QUIT:
- ungetkey(c);
- return (0);
-
- case ESCAPE:
- return (0);
- }
- return (c);
- }
-
- /*
- * Peek at the next keystroke.
- */
- peekkey()
- {
-
- Peek_key = getkey();
- return (Peek_key);
- }
-
- /*
- * Read a line from the echo area, with single character prompt c.
- * A return value of 1 means the user blewit or blewit away.
- */
- readecho(c)
- char c;
- {
- register char *sc = cursor;
- register int (*OP)();
- bool waste;
- register int OPeek;
-
- if (WBOT == WECHO)
- vclean();
- else
- vclrech(0);
- splitw++;
- vgoto(WECHO, 0);
- ex_putchar(c);
- vclreol();
- vgoto(WECHO, 1);
- cursor = linebuf; linebuf[0] = 0; genbuf[0] = c;
- if (peekbr()) {
- if (!INS[0] || (INS[0] & (QUOTE|TRIM)) == OVERBUF)
- goto blewit;
- vglobp = INS;
- }
- OP = Pline; Pline = normline;
- ignore(vgetline(0, genbuf + 1, &waste, c));
- if (Outchar == termchar)
- ex_putchar('\n');
- vscrap();
- Pline = OP;
- if (Peek_key != ATTN && Peek_key != QUIT && Peek_key != CTRL(h)) {
- cursor = sc;
- vclreol();
- return (0);
- }
- blewit:
- OPeek = Peek_key==CTRL(h) ? 0 : Peek_key; Peek_key = 0;
- splitw = 0;
- vclean();
- vshow(dot, NOLINE);
- vnline(sc);
- Peek_key = OPeek;
- return (1);
- }
-
- /*
- * A complete command has been defined for
- * the purposes of repeat, so copy it from
- * the working to the previous command buffer.
- */
- setLAST()
- {
-
- if (vglobp || vmacp)
- return;
- lastreg = vreg;
- lasthad = Xhadcnt;
- lastcnt = Xcnt;
- *lastcp = 0;
- CP(lastcmd, workcmd);
- }
-
- /*
- * Gather up some more text from an insert.
- * If the insertion buffer oveflows, then destroy
- * the repeatability of the insert.
- */
- addtext(cp)
- char *cp;
- {
-
- if (vglobp)
- return;
- addto(INS, cp);
- if ((INS[0] & (QUOTE|TRIM)) == OVERBUF)
- lastcmd[0] = 0;
- }
-
- setDEL()
- {
-
- ex_setBUF(DEL);
- }
-
- /*
- * Put text from cursor upto wcursor in BUF.
- */
- ex_setBUF(BUF)
- register char *BUF;
- {
- register int c;
- register char *wp = wcursor;
-
- c = *wp;
- *wp = 0;
- BUF[0] = 0;
- addto(BUF, cursor);
- *wp = c;
- }
-
- addto(buf, str)
- register char *buf, *str;
- {
-
- if ((buf[0] & (QUOTE|TRIM)) == OVERBUF)
- return;
- if (strlen(buf) + strlen(str) + 1 >= VBSIZE) {
- buf[0] = OVERBUF;
- return;
- }
- ignore(strcat(buf, str));
- }
-
- /*
- * Note a change affecting a lot of lines, or non-visible
- * lines. If the parameter must is set, then we only want
- * to do this for open modes now; return and save for later
- * notification in visual.
- */
- noteit(must)
- bool must;
- {
- register int sdl = destline, sdc = destcol;
-
- if (notecnt < 2 || !must && state == VISUAL)
- return (0);
- splitw++;
- if (WBOT == WECHO)
- vmoveitup(1, 1);
- vigoto(WECHO, 0);
- ex_printf("%d %sline", notecnt, notesgn);
- if (notecnt > 1)
- ex_putchar('s');
- if (*notenam) {
- ex_printf(" %s", notenam);
- if (*(strend(notenam) - 1) != 'e')
- ex_putchar('e');
- ex_putchar('d');
- }
- vclreol();
- notecnt = 0;
- if (state != VISUAL)
- vcnt = vcline = 0;
- splitw = 0;
- if (state == ONEOPEN || state == CRTOPEN)
- vup1();
- destline = sdl; destcol = sdc;
- return (1);
- }
-
- /*
- * Rrrrringgggggg.
- * If possible, use flash (VB).
- */
- beep()
- {
-
- if (VB)
- vputp(VB, 0);
- else
- vputc(CTRL(g));
- }
-
- /*
- * Map the command input character c,
- * for keypads and labelled keys which do cursor
- * motions. I.e. on an adm3a we might map ^K to ^P.
- * DM1520 for example has a lot of mappable characters.
- */
-
- map(c,maps)
- register int c;
- register struct maps *maps;
- {
- register int d;
- register char *p, *q;
- char b[10]; /* Assumption: no keypad sends string longer than 10 */
-
- /*
- * Mapping for special keys on the terminal only.
- * BUG: if there's a long sequence and it matches
- * some chars and then misses, we lose some chars.
- *
- * For this to work, some conditions must be met.
- * 1) Keypad sends SHORT (2 or 3 char) strings
- * 2) All strings sent are same length & similar
- * 3) The user is unlikely to type the first few chars of
- * one of these strings very fast.
- * Note: some code has been fixed up since the above was laid out,
- * so conditions 1 & 2 are probably not required anymore.
- * However, this hasn't been tested with any first char
- * that means anything else except escape.
- */
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"map(%c): ",c);
- #endif
- /*
- * If c==0, the char came from getesc typing escape. Pass it through
- * unchanged. 0 messes up the following code anyway.
- */
- if (c==0)
- return(0);
-
- b[0] = c;
- b[1] = 0;
- for (d=0; maps[d].mapto; d++) {
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"\ntry '%s', ",maps[d].cap);
- #endif
- if (p = maps[d].cap) {
- for (q=b; *p; p++, q++) {
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"q->b[%d], ",q-b);
- #endif
- if (*q==0) {
- /*
- * Is there another char waiting?
- *
- * This test is oversimplified, but
- * should work mostly. It handles the
- * case where we get an ESCAPE that
- * wasn't part of a keypad string.
- */
- if ((c=='#' ? peekkey() : fastpeekkey()) == 0) {
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"fpk=0: will return '%c'",c);
- #endif
- /*
- * Nothing waiting. Push back
- * what we peeked at & return
- * failure (c).
- *
- * We want to be able to undo
- * commands, but it's nonsense
- * to undo part of an insertion
- * so if in input mode don't.
- */
- #ifdef MDEBUG
- if (trace)
- fprintf(trace, "Call macpush, b %d %d %d\n", b[0], b[1], b[2]);
- #endif
- macpush(&b[1],maps == arrows);
- #ifdef MDEBUG
- if (trace)
- fprintf(trace, "return %d\n", c);
- #endif
- return(c);
- }
- *q = getkey();
- q[1] = 0;
- }
- if (*p != *q)
- goto contin;
- }
- macpush(maps[d].mapto,maps == arrows);
- c = getkey();
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"Success: push(%s), return %c",maps[d].mapto, c);
- #endif
- return(c); /* first char of map string */
- contin:;
- }
- }
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"Fail: push(%s), return %c", &b[1], c);
- #endif
- macpush(&b[1],0);
- return(c);
- }
-
- /*
- * Push st onto the front of vmacp. This is tricky because we have to
- * worry about where vmacp was previously pointing. We also have to
- * check for overflow (which is typically from a recursive macro)
- * Finally we have to set a flag so the whole thing can be undone.
- * canundo is 1 iff we want to be able to undo the macro. This
- * is false for, for example, pushing back lookahead from fastpeekkey(),
- * since otherwise two fast escapes can clobber our undo.
- */
- macpush(st, canundo)
- char *st;
- int canundo;
- {
- char tmpbuf[BUFSIZ];
-
- if (st==0 || *st==0)
- return;
- #ifdef MDEBUG
- if (trace)
- fprintf(trace, "macpush(%s), canundo=%d\n",st,canundo);
- #endif
- if ((vmacp ? strlen(vmacp) : 0) + strlen(st) > BUFSIZ)
- error("Macro too long@ - maybe recursive?");
- if (vmacp) {
- strcpy(tmpbuf, vmacp);
- if (!FIXUNDO)
- canundo = 0; /* can't undo inside a macro anyway */
- }
- strcpy(vmacbuf, st);
- if (vmacp)
- strcat(vmacbuf, tmpbuf);
- vmacp = vmacbuf;
- /* arrange to be able to undo the whole macro */
- if (canundo) {
- #ifdef notdef
- otchng = tchng;
- vsave();
- saveall();
- inopen = -1; /* no need to save since it had to be 1 or -1 before */
- vundkind = VMANY;
- #endif
- vch_mac = VC_NOCHANGE;
- }
- }
-
- #ifdef TRACE
- visdump(s)
- char *s;
- {
- register int i;
-
- if (!trace) return;
-
- fprintf(trace, "\n%s: basWTOP=%d, basWLINES=%d, WTOP=%d, WBOT=%d, WLINES=%d, WCOLS=%d, WECHO=%d\n",
- s, basWTOP, basWLINES, WTOP, WBOT, WLINES, WCOLS, WECHO);
- fprintf(trace, " vcnt=%d, vcline=%d, cursor=%d, wcursor=%d, wdot=%d\n",
- vcnt, vcline, cursor-linebuf, wcursor-linebuf, wdot-zero);
- for (i=0; i<TUBELINES; i++)
- if (vtube[i] && *vtube[i])
- fprintf(trace, "%d: '%s'\n", i, vtube[i]);
- tvliny();
- }
-
- vudump(s)
- char *s;
- {
- register line *p;
- char savelb[1024];
-
- if (!trace) return;
-
- fprintf(trace, "\n%s: undkind=%d, vundkind=%d, unddel=%d, undap1=%d, undap2=%d,\n",
- s, undkind, vundkind, lineno(unddel), lineno(undap1), lineno(undap2));
- fprintf(trace, " undadot=%d, dot=%d, dol=%d, unddol=%d, truedol=%d\n",
- lineno(undadot), lineno(dot), lineno(dol), lineno(unddol), lineno(truedol));
- fprintf(trace, " [\n");
- CP(savelb, linebuf);
- fprintf(trace, "linebuf = '%s'\n", linebuf);
- for (p=zero+1; p<=truedol; p++) {
- fprintf(trace, "%o ", *p);
- getline(*p);
- fprintf(trace, "'%s'\n", linebuf);
- }
- fprintf(trace, "]\n");
- CP(linebuf, savelb);
- }
- #endif
-
- /*
- * Get a count from the keyed input stream.
- * A zero count is indistinguishable from no count.
- */
- vgetcnt()
- {
- register int c, cnt;
-
- cnt = 0;
- for (;;) {
- c = getkey();
- if (!isdigit(c))
- break;
- cnt *= 10, cnt += c - '0';
- }
- ungetkey(c);
- Xhadcnt = 1;
- Xcnt = cnt;
- return(cnt);
- }
-
- /*
- * fastpeekkey is just like peekkey but insists the character come in
- * fast (within 1 second). This will succeed if it is the 2nd char of
- * a machine generated sequence (such as a function pad from an escape
- * flavor terminal) but fail for a human hitting escape then waiting.
- */
- fastpeekkey()
- {
- int trapalarm();
- int (*Oint)();
- register int c;
-
- /*
- * If the user has set notimeout, we wait forever for a key.
- * If we are in a macro we do too, but since it's already
- * buffered internally it will return immediately.
- * In other cases we force this to die in 1 second.
- * This is pretty reliable (VMUNIX rounds it to .5 - 1.5 secs,
- * but UNIX truncates it to 0 - 1 secs) but due to system delays
- * there are times when arrow keys or very fast typing get counted
- * as separate. notimeout is provided for people who dislike such
- * nondeterminism.
- */
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"\nfastpeekkey: ",c);
- #endif
- Oint = signal(SIGINT, trapalarm);
- if (value(TIMEOUT) && inopen >= 0) {
- signal(SIGALRM, trapalarm);
- #ifdef MDEBUG
- alarm(10);
- if (trace)
- fprintf(trace, "set alarm ");
- #else
- alarm(1);
- #endif
- }
- CATCH
- c = peekkey();
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"[OK]",c);
- #endif
- alarm(0);
- ONERR
- c = 0;
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"[TIMEOUT]",c);
- #endif
- ENDCATCH
- #ifdef MDEBUG
- if (trace)
- fprintf(trace,"[fpk:%o]",c);
- #endif
- signal(SIGINT,Oint);
- return(c);
- }
-
- trapalarm() {
- alarm(0);
- if (vcatch)
- longjmp(vreslab,1);
- }
-