/*
* Column returns the number of
* columns occupied by printing the
* characters through position cp of the
* current line.
*/
int
column(unsigned char *cp)
{
if (cp == 0)
cp = &linebuf[LBSIZE - 2];
return (qcolumn(cp, (unsigned char *)0));
}
/*
* Get a line into genbuf after gcursor.
* Cnt limits the number of input characters
* accepted and is used for handling the replace
* single character command. Aescaped is the location
* where we stick a termination indicator (whether we
* ended with an ESCAPE or a newline/return.
*
* We do erase-kill type processing here and also
* are careful about the way we do this so that it is
* repeatable. (I.e. so that your kill doesn't happen,
* when you repeat an insert if it was escaped with \ the
* first time you did it.
*/
char *
vgetline(int cnt, char *gcursor, bool *aescaped)
{
register int c, ch;
register char *cp;
int x, y, iwhite;
char *iglobp;
void (*OO)() = Outchar;
/*
* Clear the output state and counters
* for autoindent backwards motion (counts of ^D, etc.)
* Remember how much white space at beginning of line so
* as not to allow backspace over autoindent.
*/
*aescaped = 0;
ogcursor = gcursor;
flusho();
CDCNT = 0;
HADUP = 0;
HADZERO = 0;
gobbled = 0;
iwhite = whitecnt(genbuf);
iglobp = vglobp;
/*
* Carefully avoid using vinschar in the echo area.
*/
if (splitw)
Outchar = vputchar;
else {
Outchar = vinschar;
vprepins();
}
for (;;) {
if (gobblebl)
gobblebl--;
if (cnt != 0) {
cnt--;
if (cnt == 0)
goto vadone;
}
ch = c = getkey() & (QUOTE|TRIM);
if (!iglobp) {
/*
* Erase-kill type processing.
* Only happens if we were not reading
* from untyped input when we started.
* Map users erase to ^H, kill to -1 for switch.
*/
if (c == tty.c_cc[VERASE])
c = CTRL('h');
else if (c == tty.c_cc[VKILL])
c = -1;
switch (c) {
/*
* ^? Interrupt drops you back to visual
* command mode with an unread interrupt
* still in the input buffer.
*
* ^\ Quit does the same as interrupt.
* If you are a ex command rather than
* a vi command this will drop you
* back to command mode for sure.
*/
case ATTN:
case QUIT:
ungetkey(c);
goto vadone;
/*
* ^H Backs up a character in the input.
*
* BUG: Can't back around line boundaries.
* This is hard because stuff has
* already been saved for repeat.
*/
case CTRL('h'):
bakchar:
cp = gcursor - 1;
if (cp < ogcursor) {
beep();
continue;
}
goto vbackup;
/*
* ^W Back up a white/non-white word.
*/
case CTRL('w'):
wdkind = 1;
for (cp = gcursor; cp > ogcursor && isspace((int)cp[-1]); cp--)
continue;
for (c = wordch(cp - 1); cp > ogcursor && wordof(c, cp - 1); cp--)
continue;
goto vbackup;
/*
* users kill Kill input on this line, back to
* the autoindent.
*/
case -1:
cp = ogcursor;
vbackup:
if (cp == gcursor) {
beep();
continue;
}
endim();
*cp = 0;
c = cindent();
vgotoCL(qcolumn(cursor - 1, genbuf));
if (doomed >= 0)
doomed += c - cindent();
gcursor = cp;
continue;
/*
* \ Followed by erase or kill
* maps to just the erase or kill.
*/
case '\\':
x = destcol, y = destline;
ex_putchar('\\');
vcsync();
c = getkey();
if (c == tty.c_cc[VERASE]
|| c == tty.c_cc[VKILL]) {
vgoto(y, x);
if (doomed >= 0)
doomed++;
goto def;
}
ungetkey(c), c = '\\';
goto noput;
/*
* ^Q Super quote following character
* Only ^@ is verboten (trapped at
* a lower level) and \n forces a line
* split so doesn't really go in.
*
* ^V Synonym for ^Q
*/
case CTRL('q'):
case CTRL('v'):
x = destcol, y = destline;
ex_putchar('^');
vgoto(y, x);
c = getkey();
if (c != NL) {
if (doomed >= 0)
doomed++;
goto def;
}
break;
}
}
/*
* If we get a blank not in the echo area
* consider splitting the window in the wrapmargin.
*/
if (c == ' ' && !splitw) {
if (gobblebl) {
gobbled = 1;
continue;
}
if (value(WRAPMARGIN) && outcol >= WCOLS - value(WRAPMARGIN)) {
c = NL;
gobblebl = 2;
}
}
switch (c) {
/*
* ^M Except in repeat maps to \n.
*/
case CR:
if (vglobp)
goto def;
c = '\n';
/* presto chango ... */
/*
* \n Start new line.
*/
case NL:
*aescaped = c;
goto vadone;
/*
* escape End insert unless repeat and more to repeat.
*/
case ESCAPE:
if (vglobp && *vglobp)
goto def;
goto vadone;
/*
* ^D Backtab.
* ^T Software forward tab.
*
* Unless in repeat where this means these
* were superquoted in.
*/
case CTRL('d'):
case CTRL('t'):
if (vglobp)
goto def;
/* fall into ... */
/*
* ^D|QUOTE Is a backtab (in a repeated command).
*/
case CTRL('d') | QUOTE:
*gcursor = 0;
cp = vpastwh(genbuf);
c = whitecnt(genbuf);
if (ch == CTRL('t')) {
/*
* ^t just generates new indent replacing
* current white space rounded up to soft
* tab stop increment.
*/
if (cp != gcursor)
/*
* BUG: Don't hack ^T except
* right after initial
* white space.
*/
continue;
cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1));
ogcursor = cp;
goto vbackup;
}
/*
* ^D works only if we are at the (end of) the
* generated autoindent. We count the ^D for repeat
* purposes.
*/
if (c == iwhite && c != 0) {
if (cp == gcursor) {
iwhite = backtab(c);
CDCNT++;
ogcursor = cp = genindent(iwhite);
goto vbackup;
} else if (&cp[1] == gcursor &&
(*cp == '^' || *cp == '0')) {
/*
* ^^D moves to margin, then back
* to current indent on next line.
*
* 0^D moves to margin and then
* stays there.
*/
HADZERO = *cp == '0';
ogcursor = cp = genbuf;
HADUP = 1 - HADZERO;
CDCNT = 1;
endim();
back1();
vputc(' ');
goto vbackup;
}
}
if (vglobp && vglobp - iglobp >= 2 &&
(vglobp[-2] == '^' || vglobp[-2] == '0')
&& gcursor == ogcursor + 1)
goto bakchar;
continue;
default:
/*
* Possibly discard control inputs.
*/
if (!vglobp && junk(c)) {
beep();
continue;
}
def:
ex_putchar(c);
noput:
if (gcursor > &genbuf[LBSIZE - 2])
error("Line too long");
*gcursor++ = c & TRIM;
vcsync();
#ifdef LISP
if (value(SHOWMATCH) && !iglobp)
if (c == ')' || c == '}')
lsmatch(gcursor);
#endif
continue;
}
}
vadone:
*gcursor = 0;
Outchar = OO;
endim();
return (gcursor);
}
void
vappend(int ch, int cnt, int indent)
{
register int i;
register char *gcursor;
bool escape;
int repcnt;
short oldhold = hold;
/*
* Before a move in hardopen when the line is dirty
* or we are in the middle of the printed representation,
* we retype the line to the left of the cursor so the
* insert looks clean.
*/
if (ch != 'o' && state == HARDOPEN && (rubble || !ateopr())) {
rubble = 1;
wcursor = cursor;
vmove();
}
vaifirst = indent == 0;
/*
* Handle replace character by (eventually)
* limiting the number of input characters allowed
* in the vgetline routine.
*/
if (ch == 'r')
repcnt = 2;
else
repcnt = 0;
/*
* If an autoindent is specified, then
* generate a mixture of blanks to tabs to implement
* it and place the cursor after the indent.
* Text read by the vgetline routine will be placed in genbuf,
* so the indent is generated there.
*/
if (value(AUTOINDENT) && indent != 0) {
gcursor = genindent(indent);
*gcursor = 0;
vgotoCL(qcolumn(cursor - 1, genbuf));
} else {
gcursor = genbuf;
*gcursor = 0;
if (ch == 'o')
vfixcurs();
}
/*
* Prepare for undo. Pointers delimit inserted portion of line.
*/
vUA1 = vUA2 = cursor;
/*
* If we are not in a repeated command and a ^@ comes in
* then this means the previous inserted text.
* If there is none or it was too long to be saved,
* then beep() and also arrange to undo any damage done
* so far (e.g. if we are a change.)
*/
if ((vglobp && *vglobp == 0) || peekbr()) {
if ((INS[0] & (OVERBUF|TRIM)) == OVERBUF) {
beep();
if (!splitw)
ungetkey('u');
doomed = 0;
hold = oldhold;
return;
}
/*
* Unread input from INS.
* An escape will be generated at end of string.
* Hold off n^^2 type update on dumb terminals.
*/
vglobp = INS;
hold |= HOLDQIK;
} else if (vglobp == 0)
/*
* Not a repeated command, get
* a new inserted text for repeat.
*/
INS[0] = 0;
/*
* For wrapmargin to hack away second space after a '.'
* when the first space caused a line break we keep
* track that this happened in gobblebl, which says
* to gobble up a blank silently.
*/
gobblebl = 0;
/*
* Text gathering loop.
* New text goes into genbuf starting at gcursor.
* cursor preserves place in linebuf where text will eventually go.
*/
if (*cursor == 0 || state == CRTOPEN)
hold |= HOLDROL;
for (;;) {
if (ch == 'r' && repcnt == 0)
escape = 0;
else {
gcursor = vgetline(repcnt, gcursor, &escape);
/*
* After an append, stick information
* about the ^D's and ^^D's and 0^D's in
* the repeated text buffer so repeated
* inserts of stuff indented with ^D as backtab's
* can work.
*/
if (HADUP)
addtext("^");
else if (HADZERO)
addtext("0");
while (CDCNT > 0)
addtext("\204"), CDCNT--;
if (gobbled)
addtext(" ");
addtext(ogcursor);
}
repcnt = 0;
/*
* Smash the generated and preexisting indents together
* and generate one cleanly made out of tabs and spaces
* if we are using autoindent.
*/
if (!vaifirst && value(AUTOINDENT)) {
i = fixindent(indent);
if (!HADUP)
indent = i;
gcursor = strend(genbuf);
}
/*
* Limit the repetition count based on maximum
* possible line length; do output implied
* by further count (> 1) and cons up the new line
* in linebuf.
*/
cnt = vmaxrep(ch, cnt);
CP(gcursor + 1, cursor);
do {
CP(cursor, genbuf);
if (cnt > 1) {
int oldhold = hold;
Outchar = vinschar;
hold |= HOLDQIK;
ex_printf("%s", genbuf);
hold = oldhold;
Outchar = vputchar;
}
cursor += gcursor - genbuf;
} while (--cnt > 0);
endim();
vUA2 = cursor;
if (escape != '\n')
CP(cursor, gcursor + 1);
/*
* If doomed characters remain, clobber them,
* and reopen the line to get the display exact.
*/
if (state != HARDOPEN) {
DEPTH(vcline) = 0;
if (doomed > 0) {
register int cind = cindent();
physdc(cind, cind + doomed);
doomed = 0;
}
i = vreopen(LINE(vcline), lineDOT(), vcline);
}
/*
* All done unless we are continuing on to another line.
*/
if (escape != '\n')
break;
/*
* Set up for the new line.
* First save the current line, then construct a new
* first image for the continuation line consisting
* of any new autoindent plus the pushed ahead text.
*/
killU();
addtext(gobblebl ? " " : "\n");
vsave();
cnt = 1;
if (value(AUTOINDENT)) {
#ifdef LISP
if (value(LISP))
indent = lindent(dot + 1);
else
#endif
if (!HADUP && vaifirst)
indent = whitecnt(linebuf);
vaifirst = 0;
strcLIN(vpastwh(gcursor + 1));
gcursor = genindent(indent);
*gcursor = 0;
if (gcursor + strlen(linebuf) > &genbuf[LBSIZE - 2])
gcursor = genbuf;
CP(gcursor, linebuf);
} else {
CP(genbuf, gcursor + 1);
gcursor = genbuf;
}
/*
* If we started out as a single line operation and are now
* turning into a multi-line change, then we had better yank
* out dot before it changes so that undo will work
* correctly later.
*/
if (vundkind == VCHNG) {
vremote(1, (void (*)(int))yank, 0);
undap1--;
}
/*
* Now do the append of the new line in the buffer,
* and update the display. If slowopen
* we don't do very much.
*/
vdoappend(genbuf);
vundkind = VMANYINS;
vcline++;
if (state != VISUAL)
vshow(dot, NOLINE);
else {
i += LINE(vcline - 1);
vopen(dot, i);
if (value(SLOWOPEN))
vscrap();
else
vsync1(LINE(vcline));
}
strcLIN(gcursor);
*gcursor = 0;
cursor = linebuf;
vgotoCL(qcolumn(cursor - 1, genbuf));
}
/*
* All done with insertion, position the cursor
* and sync the screen.
*/
hold = oldhold;
if (cursor > linebuf)
cursor--;
if (state != HARDOPEN)
vsyncCL();
else if (cursor > linebuf)
back1();
doomed = 0;
wcursor = cursor;
vmove();
}
/*
* Get a line into genbuf after gcursor.
* Cnt limits the number of input characters
* accepted and is used for handling the replace
* single character command. Aescaped is the location
* where we stick a termination indicator (whether we
* ended with an ESCAPE or a newline/return.
*
* We do erase-kill type processing here and also
* are careful about the way we do this so that it is
* repeatable. (I.e. so that your kill doesn't happen,
* when you repeat an insert if it was escaped with \ the
* first time you did it. commch is the command character
* involved, including the prompt for readline.
*/
char *
vgetline(int cnt, char *gcursor, bool *aescaped, int commch)
{
register int c, ch;
register char *cp;
int x, y, iwhite, backsl=0;
cell *iglobp;
char cstr[2];
int (*OO)(int) = Outchar;
/*
* Clear the output state and counters
* for autoindent backwards motion (counts of ^D, etc.)
* Remember how much white space at beginning of line so
* as not to allow backspace over autoindent.
*/
*aescaped = 0;
ogcursor = gcursor;
flusho();
CDCNT = 0;
HADUP = 0;
HADZERO = 0;
gobbled = 0;
iwhite = whitecnt(genbuf);
iglobp = vglobp;
/*
* Carefully avoid using vinschar in the echo area.
*/
if (splitw)
Outchar = vputchar;
else {
Outchar = vinschar;
vprepins();
}
for (;;) {
backsl = 0;
if (gobblebl)
gobblebl--;
if (cnt != 0) {
cnt--;
if (cnt == 0)
goto vadone;
}
c = getkey();
if (c != ATTN)
c &= (QUOTE|TRIM);
ch = c;
maphopcnt = 0;
if (vglobp == 0 && Peekkey == 0 && commch != 'r')
while ((ch = map(c, immacs)) != c) {
c = ch;
if (!value(REMAP))
break;
if (++maphopcnt > 256)
error(catgets(catd, 1, 234,
"Infinite macro loop"));
}
if (!iglobp) {
/*
* Erase-kill type processing.
* Only happens if we were not reading
* from untyped input when we started.
* Map users erase to ^H, kill to -1 for switch.
*/
if (c == tty.c_cc[VERASE])
c = CTRL('h');
else if (c == tty.c_cc[VKILL])
c = -1;
if (c == ATTN)
goto case_ATTN;
switch (c) {
/*
* ^? Interrupt drops you back to visual
* command mode with an unread interrupt
* still in the input buffer.
*
* ^\ Quit does the same as interrupt.
* If you are a ex command rather than
* a vi command this will drop you
* back to command mode for sure.
*/
case QUIT:
case_ATTN:
ungetkey(c);
goto vadone;
/*
* ^H Backs up a character in the input.
*
* BUG: Can't back around line boundaries.
* This is hard because stuff has
* already been saved for repeat.
*/
case CTRL('h'):
bakchar:
cp = gcursor + skipleft(ogcursor, gcursor);
if (cp < ogcursor) {
if (splitw) {
/*
* Backspacing over readecho
* prompt. Pretend delete but
* don't beep.
*/
ungetkey(c);
goto vadone;
}
beep();
continue;
}
goto vbackup;
/*
* ^W Back up a white/non-white word.
*/
case CTRL('w'):
wdkind = 1;
for (cp = gcursor; cp > ogcursor
&& isspace(cp[-1]&0377); cp--)
continue;
for (c = wordch(cp - 1);
cp > ogcursor && wordof(c, cp - 1); cp--)
continue;
goto vbackup;
/*
* users kill Kill input on this line, back to
* the autoindent.
*/
case -1:
cp = ogcursor;
vbackup:
if (cp == gcursor) {
beep();
continue;
}
endim();
*cp = 0;
c = cindent();
vgotoCL(qcolumn(cursor +
skipleft(linebuf, cursor), genbuf));
if (doomed >= 0)
doomed += c - cindent();
gcursor = cp;
continue;
/*
* \ Followed by erase or kill
* maps to just the erase or kill.
*/
case '\\':
x = destcol, y = destline;
putchar('\\');
vcsync();
c = getkey();
if (c == tty.c_cc[VERASE]
|| c == tty.c_cc[VKILL])
{
vgoto(y, x);
if (doomed >= 0)
doomed++;
goto def;
}
ungetkey(c), c = '\\';
backsl = 1;
break;
/*
* ^Q Super quote following character
* Only ^@ is verboten (trapped at
* a lower level) and \n forces a line
* split so doesn't really go in.
*
* ^V Synonym for ^Q
*/
case CTRL('q'):
case CTRL('v'):
x = destcol, y = destline;
putchar('^');
vgoto(y, x);
c = getkey();
if (c != NL) {
if (doomed >= 0)
doomed++;
goto def;
}
break;
}
}
/*
* If we get a blank not in the echo area
* consider splitting the window in the wrapmargin.
*/
if (c != NL && !splitw) {
if (c == ' ' && gobblebl) {
gobbled = 1;
continue;
}
if (value(WRAPMARGIN) &&
(outcol >= OCOLUMNS - value(WRAPMARGIN) ||
(backsl && outcol == 0)) &&
commch != 'r') {
/*
* At end of word and hit wrapmargin.
* Move the word to next line and keep going.
*/
wdkind = 1;
gappend(c);
if (backsl)
gappend(getkey());
*gcursor = 0;
/*
* Find end of previous word if we are past it.
*/
for (cp=gcursor; cp>ogcursor
&& isspace(cp[-1]&0377); cp--)
;
if (outcol+(backsl?OCOLUMNS:0) - (gcursor-cp) >= OCOLUMNS - value(WRAPMARGIN)) {
/*
* Find beginning of previous word.
*/
for (; cp>ogcursor && !isspace(cp[-1]&0377); cp--)
;
if (cp <= ogcursor) {
/*
* There is a single word that
* is too long to fit. Just
* let it pass, but beep for
* each new letter to warn
* the luser.
*/
c = *--gcursor;
*gcursor = 0;
beep();
goto dontbreak;
}
/*
* Save it for next line.
*/
macpush(cp, 0);
cp--;
}
macpush("\n", 0);
/*
* Erase white space before the word.
*/
while (cp > ogcursor && isspace(cp[-1]&0377))
cp--; /* skip blank */
gobblebl = 3;
goto vbackup;
}
dontbreak:;
}
/*
* Word abbreviation mode.
*/
cstr[0] = c;
if (anyabbrs && gcursor > ogcursor && !wordch(cstr) && wordch(gcursor-1)) {
int wdtype, abno;
cstr[1] = 0;
wdkind = 1;
cp = gcursor + skipleft(ogcursor, gcursor);
for (wdtype = wordch(cp - 1);
cp > ogcursor && wordof(wdtype, cp - 1); cp--)
;
*gcursor = 0;
for (abno=0; abbrevs[abno].mapto; abno++) {
if (!abbrevs[abno].hadthis &&
eq(cp, abbrevs[abno].cap)) {
abbrevs[abno].hadthis++;
macpush(cstr, 0);
macpush(abbrevs[abno].mapto, 0);
goto vbackup;
}
}
}
#ifdef BIT8
if (c == OVERBUF)
goto btrp;
#endif
switch (c) {
/*
* ^M Except in repeat maps to \n.
*/
case CR:
if (vglobp)
goto def;
c = '\n';
/* presto chango ... */
/*
* \n Start new line.
*/
case NL:
*aescaped = c;
goto vadone;
/*
* escape End insert unless repeat and more to repeat.
*/
case ESCAPE:
if (lastvgk)
goto def;
goto vadone;
/*
* ^D Backtab.
* ^T Software forward tab.
*
* Unless in repeat where this means these
* were superquoted in.
*/
case CTRL('d'):
case CTRL('t'):
if (vglobp)
goto def;
/* fall into ... */
/*
* ^D|QUOTE Is a backtab (in a repeated command).
*/
#ifndef BIT8
case CTRL('d') | QUOTE:
#else
btrp:
#endif
*gcursor = 0;
cp = vpastwh(genbuf);
c = whitecnt(genbuf);
if (ch == CTRL('t')) {
/*
* ^t just generates new indent replacing
* current white space rounded up to soft
* tab stop increment.
*/
if (cp != gcursor)
/*
* BUG: Don't hack ^T except
* right after initial
* white space.
*/
continue;
cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1));
ogcursor = cp;
goto vbackup;
}
/*
* ^D works only if we are at the (end of) the
* generated autoindent. We count the ^D for repeat
* purposes.
*/
if (c == iwhite && c != 0) {
if (cp == gcursor) {
iwhite = backtab(c);
CDCNT++;
ogcursor = cp = genindent(iwhite);
goto vbackup;
} else if (&cp[1] == gcursor &&
(*cp == '^' || *cp == '0')) {
/*
* ^^D moves to margin, then back
* to current indent on next line.
*
* 0^D moves to margin and then
* stays there.
*/
HADZERO = *cp == '0';
ogcursor = cp = genbuf;
HADUP = 1 - HADZERO;
CDCNT = 1;
endim();
back1();
vputchar(' ');
goto vbackup;
}
}
if (vglobp && vglobp - iglobp >= 2 &&
(vglobp[-2] == '^' || vglobp[-2] == '0')
&& gcursor == ogcursor + 1)
goto bakchar;
continue;
default:
/*
* Possibly discard control inputs.
*/
if (!vglobp && junk(c)) {
beep();
continue;
}
def:
if (!backsl) {
/* int cnt; */
putchar(c);
flush();
}
if (gcursor > &genbuf[LBSIZE - 2])
error(catgets(catd, 1, 235, "Line too long"));
gappend(c & TRIM);
vcsync();
if (value(SHOWMATCH) && !iglobp)
if (c == ')' || c == '}')
lsmatch(gcursor);
continue;
}
}
vadone:
*gcursor = 0;
if (Outchar != termchar)
Outchar = OO;
endim();
return (gcursor);
}
