ex_vget.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/* Copyright (c) 1981 Regents of the University of California */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#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; /* char --> int */
{
if (Peekkey != ATTN)
Peekkey = c;
}
/*
* Return a keystroke, but never a ^@.
*/
getkey()
{
register int c; /* char --> int */
do {
c = getbr();
if (c==0)
beep();
} while (c == 0);
return (c);
}
/*
* Tell whether next keystroke would be a ^@.
*/
peekbr()
{
Peekkey = getbr();
return (Peekkey == 0);
}
short precbksl;
/*
* 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()
{
unsigned char ch;
register int c, d;
register unsigned char *colp;
int cnt;
static unsigned char Peek2key;
extern short slevel, ttyindes;
getATTN:
if (Peekkey) {
c = Peekkey;
Peekkey = 0;
return (c);
}
if (Peek2key) {
c = Peek2key;
Peek2key = 0;
return (c);
}
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 mess up undo for esc esc */
vundkind = VMANY;
inopen = 1; /* restore old setting now that macro done */
vch_mac = VC_NOTINMAC;
}
flusho();
again:
if ((c=read(slevel == 0 ? 0 : ttyindes, &ch, 1)) != 1) {
if (errno == EINTR)
goto getATTN;
else if (errno == EIO)
kill(getpid(), SIGHUP);
error(gettext("Input read error"));
}
c = ch;
if (beehive_glitch && slevel==0 && c == ESCAPE) {
if (read(0, &Peek2key, 1) != 1)
goto getATTN;
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;
}
}
/*
* 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 = (unsigned char *)"({)}!|^~'~";
while (d = *colp++)
if (d == c) {
d = *colp++;
break;
} else
colp++;
}
if (precbksl == 2) {
if (!d) {
Peekkey = c;
precbksl = 0;
c = '\\';
}
} else if (d)
c = d;
else {
Peekkey = c;
precbksl = 0;
c = '\\';
}
}
if (c != '\\')
precbksl = 0;
}
#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()
{
Peekkey = getkey();
return (Peekkey);
}
/*
* 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)
unsigned char c;
{
register unsigned char *sc = cursor;
register int (*OP)();
bool waste;
register int OPeek;
if (WBOT == WECHO)
vclean();
else
vclrech(0);
splitw++;
vgoto(WECHO, 0);
putchar(c);
vclreol();
vgoto(WECHO, 1);
cursor = linebuf; linebuf[0] = 0; genbuf[0] = c;
ixlatctl(1);
if (peekbr()) {
if (!INS[0] || (unsigned char)INS[128] == 0200) {
INS[128] = 0;
goto blewit;
}
vglobp = INS;
}
OP = Pline; Pline = normline;
(void)vgetline(0, genbuf + 1, &waste, c);
doomed = 0; /* don't care about doomed characters in echo line */
ixlatctl(0);
if (Outchar == termchar)
putchar('\n');
vscrap();
Pline = OP;
if (Peekkey != ATTN && Peekkey != QUIT && Peekkey != CTRL('h')) {
cursor = sc;
vclreol();
return (0);
}
blewit:
OPeek = Peekkey==CTRL('h') ? 0 : Peekkey; Peekkey = 0;
splitw = 0;
vclean();
vshow(dot, NOLINE);
vnline(sc);
Peekkey = 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)
unsigned char *cp;
{
if (vglobp)
return;
addto(INS, cp);
if ((unsigned char)INS[128] == 0200)
lastcmd[0] = 0;
}
setDEL()
{
setBUF(DEL);
}
/*
* Put text from cursor upto wcursor in BUF.
*/
setBUF(BUF)
register unsigned char *BUF;
{
register int c;
register unsigned char *wp = wcursor;
c = *wp;
*wp = 0;
BUF[0] = 0;
BUF[128] = 0;
addto(BUF, cursor);
*wp = c;
}
addto(buf, str)
register unsigned char *buf, *str;
{
if ((unsigned char)buf[128] == 0200)
return;
if (strlen(buf) + strlen(str) + 1 >= VBSIZE) {
buf[128] = 0200;
return;
}
(void)strcat(buf, str);
buf[128] = 0;
}
/*
* Verbalize command name and embed it in message.
*/
char *
verbalize(cnt, cmdstr, sgn)
int cnt;
char *cmdstr, *sgn;
{
if (cmdstr[0] == '\0')
cmdstr = (char *)Command;
if (sgn[0] == '\0') {
switch (cmdstr[0]) {
case 'c':
if (cmdstr[1] == 'h') {
printf((cnt == 1) ? gettext("1 line changed") :
gettext("%d lines changed"), cnt);
break;
} else if (cmdstr[1] != 'o') {
goto Default;
}
case 't':
if (cmdstr[1] != '\0')
goto Default;
printf((cnt == 1) ? gettext("1 line copied") :
gettext("%d lines copied"), cnt);
break;
case 'd':
printf((cnt == 1) ? gettext("1 line deleted") :
gettext("%d lines deleted"), cnt);
break;
case 'j':
printf((cnt == 1) ? gettext("1 line joined") :
gettext("%d lines joined"), cnt);
break;
case 'm':
printf((cnt == 1) ? gettext("1 line moved") :
gettext("%d lines moved"), cnt);
break;
case 'p':
printf((cnt == 1) ? gettext("1 line put") :
gettext("%d lines put"), cnt);
break;
case 'y':
printf((cnt == 1) ? gettext("1 line yanked") :
gettext("%d lines yanked"), cnt);
break;
case '>':
printf((cnt == 1) ? gettext("1 line >>ed") :
gettext("%d lines >>ed"), cnt);
break;
case '=':
printf((cnt == 1) ? gettext("1 line =ed") :
gettext("%d lines =ed"), cnt);
break;
case '<':
printf((cnt == 1) ? gettext("1 line <<ed") :
gettext("%d lines <<ed"), cnt);
break;
default:
Default:
printf((cnt == 1) ? gettext("1 line") :
gettext("%d lines"), cnt);
break;
}
} else if (sgn[0] == 'm') {
printf((cnt == 1) ? gettext("1 more line") :
gettext("%d more lines"), cnt);
} else {
printf((cnt == 1) ? gettext("1 fewer line") :
gettext("%d fewer lines"), cnt);
}
return (NULL);
}
/*
* 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 < 1 || !must && state == VISUAL)
return (0);
splitw++;
if (WBOT == WECHO)
vmoveitup(1, 1);
vigoto(WECHO, 0);
verbalize(notecnt, notenam, notesgn);
vclreol();
notecnt = 0;
if (state != VISUAL)
vcnt = vcline = 0;
splitw = 0;
if (state == ONEOPEN || state == CRTOPEN)
vup1();
destline = sdl; destcol = sdc;
return (1);
}
/*
* Ring or beep.
* If possible, flash screen.
*/
beep()
{
if (flash_screen && value(vi_FLASH))
vputp(flash_screen, 0);
else if (bell)
vputp(bell, 0);
}
/*
* 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,commch)
register int c;
register struct maps *maps;
unsigned char commch; /* indicate if in append/insert/replace mode */
{
register int d;
register unsigned char *p, *q;
unsigned char b[10]; /* Assumption: no keypad sends string longer than 10 */
unsigned char *st;
/*
* 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; d < MAXNOMACS && 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);
/*
* For all macros performed within insert,
* append, or replacement mode, we must end
* up returning back to that mode when we
* return (except that append will become
* insert for <home> key, so cursor is not
* in second column).
*
* In order to preserve backward movement
* when leaving insert mode, an 'l' must be
* done to compensate for the left done by
* the <esc> (except when cursor is already
* in the first column: i.e., outcol = 0).
*/
if ((maps == immacs)
&& strcmp(maps[d].descr, maps[d].cap)) {
switch (commch) {
case 'R':
if (!strcmp(maps[d].descr, "home"))
st = (unsigned char *)"R";
else
if (outcol == 0)
st = (unsigned char *)"R";
else
st = (unsigned char *)"lR";
break;
case 'i':
if (!strcmp(maps[d].descr, "home"))
st = (unsigned char *)"i";
else
if (outcol == 0)
st = (unsigned char *)"i";
else
st = (unsigned char *)"li";
break;
case 'a':
if (!strcmp(maps[d].descr, "home"))
st = (unsigned char *)"i";
else
st = (unsigned char *)"a";
break;
default:
st = (unsigned char *)"i";
}
if(strlen(vmacbuf) + strlen(st) > BUFSIZE)
error(value(vi_TERSE) ?
gettext("Macro too long") : gettext("Macro too long - maybe recursive?"));
else
/*
* Macros such as function keys are
* performed by leaving the insert,
* replace, or append mode, executing
* the proper cursor movement commands
* and returning to the mode we are
* currently in (commch).
*/
strcat(vmacbuf, st);
}
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)
unsigned char *st;
int canundo;
{
unsigned char tmpbuf[BUFSIZE];
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) > BUFSIZE)
error(value(vi_TERSE) ? gettext("Macro too long") :
gettext("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 UNDOTRACE
visdump(s)
unsigned 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)
unsigned char *s;
{
register line *p;
unsigned 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()
{
void trapalarm();
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.
*/
CATCH
if (value(vi_TIMEOUT) && inopen >= 0) {
signal(SIGALRM, trapalarm);
setalarm();
}
c = peekkey();
cancelalarm();
ONERR
c = 0;
ENDCATCH
/* Should have an alternative method based on select for 4.2BSD */
return(c);
}
static int ftfd;
struct requestbuf {
short time;
short signo;
};
/*
* Arrange for SIGALRM to come in shortly, so we don't
* hang very long if the user didn't type anything. There are
* various ways to do this on different systems.
*/
setalarm()
{
unsigned char ftname[20];
struct requestbuf rb;
#ifdef FTIOCSET
/*
* Use nonstandard "fast timer" to get better than
* one second resolution. We must wait at least
* 1/15th of a second because some keypads don't
* transmit faster than this.
*/
/* Open ft psuedo-device - we need our own copy. */
if (ftfd == 0) {
strcpy(ftname, "/dev/ft0");
while (ftfd <= 0 && ftname[7] <= '~') {
ftfd = open(ftname, 0);
if (ftfd <= 0)
ftname[7] ++;
}
}
if (ftfd <= 0) { /* Couldn't open a /dev/ft? */
alarm(1);
} else {
rb.time = 6; /* 6 ticks = 100 ms > 67 ms. */
rb.signo = SIGALRM;
ioctl(ftfd, FTIOCSET, &rb);
}
#else
/*
* No special capabilities, so we use alarm, with 1 sec. resolution.
*/
alarm(1);
#endif
}
/*
* Get rid of any impending incoming SIGALRM.
*/
cancelalarm()
{
struct requestbuf rb;
#ifdef FTIOCSET
if (ftfd > 0) {
rb.time = 0;
rb.signo = SIGALRM;
ioctl(ftfd, FTIOCCANCEL, &rb);
}
#endif
alarm(0); /* Have to do this whether or not FTIOCSET */
}
void trapalarm() {
alarm(0);
longjmp(vreslab,1);
}