/* input.c */
/* Author:
* Steve Kirkendall
* 14407 SW Teal Blvd. #C
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
/* This file contains the input() function, which implements vi's INPUT mode.
* It also contains the code that supports digraphs.
*/
#include "config.h"
#include "ctype.h"
#include "vi.h"
#ifndef NO_DIGRAPH
static struct _DIG
{
struct _DIG *next;
char key1;
char key2;
char dig;
char save;
} *digs;
char digraph(key1, key2)
int key1; /* the underlying character */
int key2; /* the second character */
{
int newkey;
REG struct _DIG *dp;
/* if digraphs are disabled, then just return the new char */
if (!*o_digraph)
{
return key2;
}
/* remember the new key, so we can return it if this isn't a digraph */
newkey = key2;
/* sort key1 and key2, so that their original order won't matter */
if (key1 > key2)
{
key2 = key1;
key1 = newkey;
}
/* scan through the digraph chart */
for (dp = digs;
dp && (dp->key1 != key1 || dp->key2 != key2);
dp = dp->next)
{
}
/* if this combination isn't in there, just use the new key */
if (!dp)
{
return newkey;
}
/* else use the digraph key */
return dp->dig;
}
/* this function lists or defines digraphs */
void do_digraph(bang, extra)
int bang;
char extra[];
{
int dig;
REG struct _DIG *dp;
struct _DIG *prev;
static int user_defined = FALSE; /* boolean: are all later digraphs user-defined? */
char listbuf[8];
/* if "extra" is NULL, then we've reached the end of the built-ins */
if (!extra)
{
user_defined = TRUE;
return;
}
/* if no args, then display the existing digraphs */
if (*extra < ' ')
{
listbuf[0] = listbuf[1] = listbuf[2] = listbuf[5] = ' ';
listbuf[7] = '\0';
for (dig = 0, dp = digs; dp; dp = dp->next)
{
if (dp->save || bang)
{
dig += 7;
if (dig >= COLS)
{
addch('\n');
exrefresh();
dig = 7;
}
listbuf[3] = dp->key1;
listbuf[4] = dp->key2;
listbuf[6] = dp->dig;
qaddstr(listbuf);
}
}
addch('\n');
exrefresh();
return;
}
/* make sure we have at least two characters */
if (!extra[1])
{
msg("Digraphs must be composed of two characters");
return;
}
/* sort key1 and key2, so that their original order won't matter */
if (extra[0] > extra[1])
{
dig = extra[0];
extra[0] = extra[1];
extra[1] = dig;
}
/* locate the new digraph character */
for (dig = 2; extra[dig] == ' ' || extra[dig] == '\t'; dig++)
{
}
dig = extra[dig];
if (!bang && dig)
{
dig |= 0x80;
}
/* search for the digraph */
for (prev = (struct _DIG *)0, dp = digs;
dp && (dp->key1 != extra[0] || dp->key2 != extra[1]);
prev = dp, dp = dp->next)
{
}
/* deleting the digraph? */
if (!dig)
{
if (!dp)
{
#ifndef CRUNCH
msg("%c%c not a digraph", extra[0], extra[1]);
#endif
return;
}
if (prev)
prev->next = dp->next;
else
digs = dp->next;
_free_(dp);
return;
}
/* if necessary, create a new digraph struct for the new digraph */
if (dig && !dp)
{
dp = (struct _DIG *)malloc(sizeof *dp);
if (!dp)
{
msg("Out of space in the digraph table");
return;
}
if (prev)
prev->next = dp;
else
digs = dp;
dp->next = (struct _DIG *)0;
}
/* assign it the new digraph value */
dp->key1 = extra[0];
dp->key2 = extra[1];
dp->dig = dig;
dp->save = user_defined;
}
# ifndef NO_MKEXRC
void savedigs(fd)
int fd;
{
static char buf[] = "digraph! XX Y\n";
REG struct _DIG *dp;
for (dp = digs; dp; dp = dp->next)
{
if (dp->save)
{
buf[9] = dp->key1;
buf[10] = dp->key2;
buf[12] = dp->dig;
write(fd, buf, (unsigned)14);
}
}
}
# endif
#endif
/* This function allows the user to replace an existing (possibly zero-length)
* chunk of text with typed-in text. It returns the MARK of the last character
* that the user typed in.
*/
MARK input(from, to, when, delta)
MARK from; /* where to start inserting text */
MARK to; /* extent of text to delete */
int when; /* either WHEN_VIINP or WHEN_VIREP */
int delta; /* 1 to take indent from lower line, -1 for upper, 0 for none */
{
char key[2]; /* key char followed by '\0' char */
char *build; /* used in building a newline+indent string */
char *scan; /* used while looking at the indent chars of a line */
MARK m; /* some place in the text */
#ifndef NO_EXTENSIONS
int quit = FALSE; /* boolean: are we exiting after this? */
int inchg; /* boolean: have we done a "beforedo()" yet? */
#endif
#ifdef DEBUG
/* if "from" and "to" are reversed, complain */
if (from > to)
{
msg("ERROR: input(%ld:%d, %ld:%d)",
markline(from), markidx(from),
markline(to), markidx(to));
return MARK_UNSET;
}
#endif
key[1] = 0;
/* if we're replacing text with new text, save the old stuff */
/* (Alas, there is no easy way to save text for replace mode) */
if (from != to)
{
cut(from, to);
}
/* if doing a dot command, then reuse the previous text */
if (doingdot)
{
ChangeText
{
/* delete the text that's there now */
if (from != to)
{
delete(from, to);
}
/* insert the previous text */
cutname('.');
cursor = paste(from, FALSE, TRUE) + 1L;
}
}
else /* interactive version */
{
/* assume that whoever called this already did a beforedo() */
#ifndef NO_EXTENSIONS
inchg = TRUE;
#endif
/* if doing a change within the line... */
if (from != to && markline(from) == markline(to))
{
/* mark the end of the text with a "$" */
change(to - 1, to, "$");
}
else
{
/* delete the old text right off */
if (from != to)
{
delete(from, to);
}
to = from;
}
/* handle autoindent of the first line, maybe */
cursor = from;
m = cursor + MARK_AT_LINE(delta);
if (delta != 0 && *o_autoindent && markidx(m) == 0
&& markline(m) >= 1L && markline(m) <= nlines)
{
/* Only autoindent blank lines. */
pfetch(markline(cursor));
if (plen == 0)
{
/* Okay, we really want to autoindent */
pfetch(markline(m));
for (scan = ptext, build = tmpblk.c;
*scan == ' ' || *scan == '\t';
)
{
*build++ = *scan++;
}
if (build > tmpblk.c)
{
*build = '\0';
add(cursor, tmpblk.c);
cursor += (int)(build - tmpblk.c);
if (cursor > to)
to = cursor;
}
}
}
/* repeatedly add characters from the user */
for (;;)
{
/* Get a character */
redraw(cursor, TRUE);
#ifdef DEBUG2
msg("cursor=%ld.%d, to=%ld.%d",
markline(cursor), markidx(cursor),
markline(to), markidx(to));
#endif
#ifndef NO_ABBR
pfetch(markline(cursor));
build = ptext;
if (pline == markline(from))
build += markidx(from);
for (scan = ptext + markidx(cursor); --scan >= build && !isspace(*scan); )
{
}
scan++;
key[0] = getabkey(when, scan, (int)(ptext + markidx(cursor) - scan));
#else
key[0] = getkey(when);
#endif
#ifndef NO_VISIBLE
if (key[0] != ctrl('O') && V_from != MARK_UNSET)
{
msg("Can't modify text during a selection");
beep();
continue;
}
#endif
#ifndef NO_EXTENSIONS
if (key[0] == ctrl('O'))
{
if (inchg)
{
if (cursor < to)
{
delete(cursor, to);
redraw(cursor, TRUE);
}
afterdo();
inchg = FALSE;
}
}
else if (key[0] != ctrl('['))
{
if (!inchg)
{
beforedo(FALSE);
inchg = TRUE;
}
}
#endif
#ifndef CRUNCH
/* if wrapmargin is set & we're past the
* warpmargin, then change the last whitespace
* characters on line into a newline
*/
if (*o_wrapmargin)
{
pfetch(markline(cursor));
if (plen == idx2col(cursor, ptext, TRUE)
&& plen > COLS - (*o_wrapmargin & 0xff))
{
build = tmpblk.c;
*build++ = '\n';
if (*o_autoindent)
{
/* figure out indent for next line */
for (scan = ptext; *scan == ' ' || *scan == '\t'; )
{
*build++ = *scan++;
}
}
*build = '\0';
scan = ptext + plen;
m = cursor & ~(BLKSIZE - 1);
while (ptext < scan)
{
scan--;
if (*scan != ' ' && *scan != '\t')
continue;
/*break up line, and we do autoindent if needed*/
change(m + (int)(scan - ptext), m + (int)(scan - ptext) + 1, tmpblk.c);
/* NOTE: for some reason, MSC 5.10 doesn't
* like for these lines to be combined!!!
*/
cursor = (cursor & ~(BLKSIZE - 1));
cursor += BLKSIZE;
cursor += strlen(tmpblk.c) - 1;
cursor += plen - (int)(scan - ptext) - 1;
/*remove trailing spaces on previous line*/
pfetch(markline(m));
scan = ptext + plen;
while (ptext < scan)
{
scan--;
if (*scan != ' ' && *scan != '\t')
break;
}
delete(m + (int)(scan - ptext) + 1, m + plen);
break;
}
}
}
#endif /* !CRUNCH */
/* process it */
switch (*key)
{
#ifndef NO_EXTENSIONS
case ctrl('O'): /* special movement mapped keys */
*key = getkey(0);
switch (*key)
{
case 'h': m = m_left(cursor, 0L); break;
case 'j':
case 'k': m = m_updnto(cursor, 0L, *key); break;
case 'l': m = cursor + 1; break;
case 'B':
case 'b': m = m_bword(cursor, 0L, *key); break;
case 'W':
case 'w': m = m_fword(cursor, 0L, *key, '\0'); break;
case '^': m = m_front(cursor, 0L); break;
case '$': m = m_rear(cursor, 0L); break;
case ctrl('B'):
case ctrl('F'):
m = m_scroll(cursor, 0L, *key); break;
case 'x':
#ifndef NO_VISIBLE
if (V_from)
beep();
else
#endif
ChangeText
{
m = v_xchar(cursor, 0L, 'x');
}
break;
case 'i': m = to = from = cursor;
when = WHEN_VIINP + WHEN_VIREP - when;
break;
case 'K':
pfetch(markline(cursor));
changes++; /* <- after this, we can alter ptext */
ptext[markidx(cursor)] = 0;
for (scan = ptext + markidx(cursor) - 1;
scan >= ptext && isalnum(*scan);
scan--)
{
}
scan++;
m = (*scan ? v_keyword(scan, cursor, 0L) : cursor);
break;
# ifndef NO_VISIBLE
case 'v':
case 'V':
if (V_from)
V_from = MARK_UNSET;
else
V_from = cursor;
m = from = to = cursor;
V_linemd = (*key == 'V');
break;
case 'd':
case 'y':
case '\\':
/* do nothing if unmarked */
if (!V_from)
{
msg("You must mark the text first");
beep();
break;
}
/* "from" must come before "to" */
if (V_from < cursor)
{
from = V_from;
to = cursor;
}
else
{
from = cursor;
to = V_from;
}
/* we don't need V_from anymore */
V_from = MARK_UNSET;
if (V_linemd)
{
/* adjust for line mode */
from &= ~(BLKSIZE - 1);
to |= (BLKSIZE - 1);
}
else
{
/* in character mode, we must
* worry about deleting the newline
* at the end of the last line
*/
pfetch(markline(to));
if (markidx(to) == plen)
to |= (BLKSIZE - 1);
}
to++;
switch (*key)
{
case 'y':
cut(from, to);
break;
case 'd':
ChangeText
{
cut(from, to);
delete(from, to);
}
cursor = from;
break;
#ifndef NO_POPUP
case '\\':
ChangeText
{
cursor = v_popup(from, to);
}
break;
#endif
}
m = from = to = cursor;
break;
case 'p':
case 'P':
V_from = MARK_UNSET;
ChangeText
{
m = paste(cursor, (*key == 'p'), FALSE);
}
break;
# endif /* !NO_VISIBLE */
default: m = MARK_UNSET;
}
/* adjust the moved cursor */
if (m != cursor)
{
m = adjmove(cursor, m, (*key == 'j' || *key == 'k' ? NCOL|FINL : FINL));
if (plen && (*key == '$' || (*key == 'l' && m <= cursor)))
{
m++;
}
}
/* if the cursor is reasonable, use it */
if (m == MARK_UNSET)
{
beep();
}
else
{
from = to = cursor = m;
}
break;
case ctrl('Z'):
if (getkey(0) == ctrl('Z'))
{
quit = TRUE;
goto BreakBreak;
}
break;
#endif
case ctrl('['):
/* if last line contains only whitespace, then remove whitespace */
if (*o_autoindent)
{
pfetch(markline(cursor));
for (scan = ptext; isspace(*scan); scan++)
{
}
if (scan > ptext && !*scan)
{
cursor &= ~(BLKSIZE - 1L);
if (to < cursor + plen)
{
to = cursor + plen;
}
}
}
goto BreakBreak;
case ctrl('U'):
if (markline(cursor) == markline(from))
{
cursor = from;
}
else
{
cursor &= ~(BLKSIZE - 1);
}
break;
case ctrl('D'):
case ctrl('T'):
if (to > cursor)
{
delete(cursor, to);
}
mark[27] = cursor;
cmd_shift(cursor, cursor, *key == ctrl('D') ? CMD_SHIFTL : CMD_SHIFTR, TRUE, "");
if (mark[27])
{
cursor = mark[27];
}
else
{
cursor = m_front(cursor, 0L);
}
to = cursor;
break;
case '\b':
if (cursor <= from)
{
beep();
}
else if (markidx(cursor) == 0)
{
cursor -= BLKSIZE;
pfetch(markline(cursor));
cursor += plen;
}
else
{
cursor--;
}
break;
case ctrl('W'):
m = m_bword(cursor, 1L, 'b');
if (markline(m) == markline(cursor) && m >= from)
{
cursor = m;
if (from > cursor)
{
from = cursor;
}
}
else
{
beep();
}
break;
case '\n':
#if OSK
case '\l':
#else
case '\r':
#endif
build = tmpblk.c;
*build++ = '\n';
if (*o_autoindent)
{
/* figure out indent for next line */
pfetch(markline(cursor));
for (scan = ptext; *scan == ' ' || *scan == '\t'; )
{
*build++ = *scan++;
}
/* remove indent from this line, if blank */
if ((int)(scan - ptext) >= markidx(cursor) && plen > 0)
{
to = cursor &= ~(BLKSIZE - 1);
delete(cursor, cursor + (int)(scan - ptext));
}
#if 0
/* advance "to" past whitespace at the cursor */
if (to >= cursor)
{
for (scan = ptext + markidx(cursor), to = cursor; *scan == ' ' || *scan == '\t'; scan++, to++)
{
}
}
#endif
}
*build = 0;
if (cursor >= to && when != WHEN_VIREP)
{
add(cursor, tmpblk.c);
}
else
{
change(cursor, to, tmpblk.c);
}
redraw(cursor, TRUE);
to = cursor = (cursor & ~(BLKSIZE - 1))
+ BLKSIZE
+ (int)(build - tmpblk.c) - 1;
break;
case ctrl('A'):
case ctrl('P'):
if (cursor < to)
{
delete(cursor, to);
}
if (*key == ctrl('A'))
{
cutname('.');
}
m = paste(cursor, FALSE, TRUE);
if (m != MARK_UNSET)
{
to = cursor = m + 1L;
}
break;
case ctrl('V'):
if (cursor >= to && when != WHEN_VIREP)
{
add(cursor, "^");
}
else
{
change(cursor, to, "^");
to = cursor + 1;
}
redraw(cursor, TRUE);
*key = getkey(0);
if (*key == '\n')
{
/* '\n' too hard to handle */
#if OSK
*key = '\l';
#else
*key = '\r';
#endif
}
change(cursor, cursor + 1, key);
cursor++;
if (cursor > to)
{
to = cursor;
}
break;
case ctrl('L'):
case ctrl('R'):
redraw(MARK_UNSET, FALSE);
break;
default:
if (cursor >= to && when != WHEN_VIREP)
{
add(cursor, key);
cursor++;
to = cursor;
}
else
{
pfetch(markline(cursor));
if (markidx(cursor) == plen)
{
add(cursor, key);
}
else
{
#ifndef NO_DIGRAPH
*key = digraph(ptext[markidx(cursor)], *key);
#endif
change(cursor, cursor + 1, key);
}
cursor++;
}
#ifndef NO_SHOWMATCH
/* show matching "({[" if necessary */
if (*o_showmatch && strchr(")}]", *key))
{
redraw(cursor, TRUE);
m = m_match(cursor - 1, 0L);
if (markline(m) >= topline
&& markline(m) <= botline)
{
redraw(m, TRUE);
refresh();
sleep(1);
}
}
#endif
} /* end switch(*key) */
} /* end for(;;) */
BreakBreak:;
/* delete any excess characters */
if (cursor < to)
{
#ifndef NO_EXTENSIONS
/* if we aren't in the middle of a change, start one! */
if (!inchg)
{
beforedo(FALSE);
inchg = TRUE;
}
#endif
delete(cursor, to);
}
} /* end if doingdot else */
/* put the new text into a cut buffer for possible reuse */
if (!doingdot)
{
blksync();
cutname('.');
cut(from, cursor);
}
/* move to last char that we inputted, unless it was newline */
if (markidx(cursor) != 0)
{
cursor--;
}
redraw(cursor, FALSE);
#ifndef NO_EXTENSIONS
if (quit)
{
/* if this is a nested "do", then cut it short */
abortdo();
/* exit, unless we can't write out the file */
cursor = v_xit(cursor, 0L, 'Z');
}
#endif
rptlines = 0L;
return cursor;
}