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minix/commands/elvis/vi.c

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Initial revision
2005-04-21 16:53:53 +02:00
/* vi.c */
/* Author:
* Steve Kirkendall
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
#include "config.h"
#include "ctype.h"
#include "vi.h"
/* This array describes what each key does */
#define NO_FUNC (MARK (*)())0
#define NO_ARGS 0
#define CURSOR 1
#define CURSOR_CNT_KEY 2
#define CURSOR_MOVED 3
#define CURSOR_EOL 4
#define ZERO 5
#define DIGIT 6
#define CURSOR_TEXT 7
#define KEYWORD 8
#define ARGSMASK 0x0f
#define C_C_K_REP1 (CURSOR_CNT_KEY | 0x10)
#define C_C_K_CUT (CURSOR_CNT_KEY | 0x20)
#define C_C_K_MARK (CURSOR_CNT_KEY | 0x30)
#define C_C_K_CHAR (CURSOR_CNT_KEY | 0x40)
#ifndef NO_SHOWMODE
static int keymodes[] = {0, WHEN_REP1, WHEN_CUT, WHEN_MARK, WHEN_CHAR};
# define KEYMODE(args) (keymodes[(args) >> 4])
#else
# define KEYMODE(args) 0
#endif
static struct keystru
{
MARK (*func)(); /* the function to run */
uchar args; /* description of the args needed */
#ifndef NO_VISIBLE
short flags;
#else
uchar flags; /* other stuff */
#endif
}
vikeys[] =
{
/* NUL not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#ifndef NO_EXTENSIONS
/* ^A find cursor word */ {m_wsrch, KEYWORD, MVMT|NREL|VIZ},
#else
/* ^A not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* ^B page backward */ {m_scroll, CURSOR, FRNT|VIZ},
/* ^C not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^D scroll dn 1/2page*/ {m_scroll, CURSOR, NCOL|VIZ},
/* ^E scroll up */ {m_scroll, CURSOR, NCOL|VIZ},
/* ^F page forward */ {m_scroll, CURSOR, FRNT|VIZ},
/* ^G show file status */ {v_status, NO_ARGS, NO_FLAGS},
/* ^H move left, like h*/ {m_left, CURSOR, MVMT|VIZ},
/* ^I not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^J move down */ {m_updnto, CURSOR, MVMT|LNMD|VIZ|INCL},
/* ^K not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^L redraw screen */ {v_redraw, NO_ARGS, NO_FLAGS|VIZ},
/* ^M mv front next ln */ {m_updnto, CURSOR, MVMT|FRNT|LNMD|VIZ|INCL},
/* ^N move down */ {m_updnto, CURSOR, MVMT|LNMD|VIZ|INCL|NCOL},
/* ^O not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^P move up */ {m_updnto, CURSOR, MVMT|LNMD|VIZ|INCL|NCOL},
/* ^Q not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^R redraw screen */ {v_redraw, NO_ARGS, NO_FLAGS|VIZ},
/* ^S not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^T not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^U scroll up 1/2page*/ {m_scroll, CURSOR, NCOL|VIZ},
/* ^V not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^W not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^X move to phys col */ {m_tocol, CURSOR, MVMT|NREL|VIZ},
/* ^Y scroll down */ {m_scroll, CURSOR, NCOL|VIZ},
#ifdef SIGTSTP
/* ^Z suspend elvis */ {v_suspend, NO_ARGS, NO_FLAGS},
#else
/* ^Z not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* ESC not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^\ not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ^] keyword is tag */ {v_tag, KEYWORD, NO_FLAGS},
/* ^^ previous file */ {v_switch, CURSOR, NO_FLAGS},
/* ^_ not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* SPC move right,like l*/ {m_right, CURSOR, MVMT|INCL|VIZ},
/* ! run thru filter */ {v_filter, CURSOR_MOVED, FRNT|LNMD|INCL|VIZ},
/* " select cut buffer*/ {v_selcut, C_C_K_CUT, PTMV|VIZ},
#ifndef NO_EXTENSIONS
/* # increment number */ {v_increment, KEYWORD, SDOT},
#else
/* # not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* $ move to rear */ {m_rear, CURSOR, MVMT|INCL|VIZ},
/* % move to match */ {m_match, CURSOR, MVMT|INCL|VIZ},
/* & repeat subst */ {v_again, CURSOR_MOVED, SDOT|NCOL|LNMD|INCL},
/* ' move to a mark */ {m_tomark, C_C_K_MARK, MVMT|FRNT|NREL|LNMD|INCL|VIZ},
#ifndef NO_SENTENCE
/* ( mv back sentence */ {m_sentence, CURSOR, MVMT|VIZ},
/* ) mv fwd sentence */ {m_sentence, CURSOR, MVMT|VIZ},
#else
/* ( not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* ) not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
#ifndef NO_ERRLIST
/* * errlist */ {v_errlist, CURSOR, FRNT|NREL},
#else
/* * not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* + mv front next ln */ {m_updnto, CURSOR, MVMT|FRNT|LNMD|VIZ|INCL},
#ifndef NO_CHARSEARCH
/* , reverse [fFtT] cmd*/ {m__ch, CURSOR, MVMT|INCL|VIZ},
#else
/* , not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* - mv front prev ln */ {m_updnto, CURSOR, MVMT|FRNT|LNMD|VIZ|INCL},
/* . special... */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* / forward search */ {m_fsrch, CURSOR_TEXT, MVMT|NREL|VIZ},
/* 0 part of count? */ {NO_FUNC, ZERO, MVMT|PTMV|VIZ},
/* 1 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 2 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 3 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 4 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 5 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 6 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 7 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 8 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* 9 part of count */ {NO_FUNC, DIGIT, PTMV|VIZ},
/* : run single EX cmd*/ {v_1ex, CURSOR_TEXT, NO_FLAGS},
#ifndef NO_CHARSEARCH
/* ; repeat [fFtT] cmd*/ {m__ch, CURSOR, MVMT|INCL|VIZ},
#else
/* ; not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS|VIZ},
#endif
/* < shift text left */ {v_lshift, CURSOR_MOVED, SDOT|FRNT|LNMD|INCL|VIZ},
/* = preset filter */ {v_reformat, CURSOR_MOVED, SDOT|FRNT|LNMD|INCL|VIZ},
/* > shift text right */ {v_rshift, CURSOR_MOVED, SDOT|FRNT|LNMD|INCL|VIZ},
/* ? backward search */ {m_bsrch, CURSOR_TEXT, MVMT|NREL|VIZ},
#ifndef NO_AT
/* @ execute a cutbuf */ {v_at, C_C_K_CUT, NO_FLAGS},
#else
/* @ not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* A append at EOL */ {v_insert, CURSOR, SDOT},
/* B move back Word */ {m_bword, CURSOR, MVMT|VIZ},
/* C change to EOL */ {v_change, CURSOR_EOL, SDOT},
/* D delete to EOL */ {v_delete, CURSOR_EOL, SDOT},
/* E move end of Word */ {m_eword, CURSOR, MVMT|INCL|VIZ},
#ifndef NO_CHARSEARCH
/* F move bk to char */ {m_Fch, C_C_K_CHAR, MVMT|INCL|VIZ},
#else
/* F not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* G move to line # */ {m_updnto, CURSOR, MVMT|NREL|LNMD|FRNT|INCL|VIZ},
/* H move to row */ {m_row, CURSOR, MVMT|LNMD|FRNT|VIZ|INCL},
/* I insert at front */ {v_insert, CURSOR, SDOT},
/* J join lines */ {v_join, CURSOR, SDOT},
#ifndef NO_EXTENSIONS
/* K look up keyword */ {v_keyword, KEYWORD, NO_FLAGS},
#else
/* K not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* L move to last row */ {m_row, CURSOR, MVMT|LNMD|FRNT|VIZ|INCL},
/* M move to mid row */ {m_row, CURSOR, MVMT|LNMD|FRNT|VIZ|INCL},
/* N reverse prev srch*/ {m_Nsrch, CURSOR, MVMT|NREL|VIZ},
/* O insert above line*/ {v_insert, CURSOR, SDOT},
/* P paste before */ {v_paste, CURSOR, SDOT},
/* Q quit to EX mode */ {v_quit, NO_ARGS, NO_FLAGS},
/* R overtype */ {v_overtype, CURSOR, SDOT},
/* S change line */ {v_change, CURSOR_MOVED, SDOT},
#ifndef NO_CHARSEARCH
/* T move bk to char */ {m_Tch, C_C_K_CHAR, MVMT|INCL|VIZ},
#else
/* T not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* U undo whole line */ {v_undoline, CURSOR, FRNT},
#ifndef NO_VISIBLE
/* V start visible */ {v_start, CURSOR, INCL|LNMD|VIZ},
#else
/* V not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* W move forward Word*/ {m_fword, CURSOR, MVMT|INCL|VIZ},
/* X delete to left */ {v_xchar, CURSOR, SDOT},
/* Y yank text */ {v_yank, CURSOR_MOVED, NCOL},
/* Z save file & exit */ {v_xit, CURSOR_CNT_KEY, NO_FLAGS},
/* [ move back section*/ {m_paragraph, CURSOR, MVMT|LNMD|NREL|VIZ},
#ifndef NO_POPUP
/* \ pop-up menu */ {v_popup, CURSOR_MOVED, VIZ},
#else
/* \ not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* ] move fwd section */ {m_paragraph, CURSOR, MVMT|LNMD|NREL|VIZ},
/* ^ move to front */ {m_front, CURSOR, MVMT|VIZ},
/* _ current line */ {m_updnto, CURSOR, MVMT|LNMD|FRNT|INCL},
/* ` move to mark */ {m_tomark, C_C_K_MARK, MVMT|NREL|VIZ},
/* a append at cursor */ {v_insert, CURSOR, SDOT},
/* b move back word */ {m_bword, CURSOR, MVMT|VIZ},
/* c change text */ {v_change, CURSOR_MOVED, SDOT|VIZ},
/* d delete op */ {v_delete, CURSOR_MOVED, SDOT|VIZ},
/* e move end word */ {m_eword, CURSOR, MVMT|INCL|VIZ},
#ifndef NO_CHARSEARCH
/* f move fwd for char*/ {m_fch, C_C_K_CHAR, MVMT|INCL|VIZ},
#else
/* f not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* g not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* h move left */ {m_left, CURSOR, MVMT|VIZ},
/* i insert at cursor */ {v_insert, CURSOR, SDOT},
/* j move down */ {m_updnto, CURSOR, MVMT|NCOL|LNMD|VIZ|INCL},
/* k move up */ {m_updnto, CURSOR, MVMT|NCOL|LNMD|VIZ|INCL},
/* l move right */ {m_right, CURSOR, MVMT|INCL|VIZ},
/* m define a mark */ {v_mark, C_C_K_MARK, NO_FLAGS},
/* n repeat prev srch */ {m_nsrch, CURSOR, MVMT|NREL|VIZ},
/* o insert below line*/ {v_insert, CURSOR, SDOT},
/* p paste after */ {v_paste, CURSOR, SDOT},
/* q not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
/* r replace chars */ {v_replace, C_C_K_REP1, SDOT},
/* s subst N chars */ {v_subst, CURSOR, SDOT},
#ifndef NO_CHARSEARCH
/* t move fwd to char */ {m_tch, C_C_K_CHAR, MVMT|INCL|VIZ},
#else
/* t not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* u undo */ {v_undo, CURSOR, NO_FLAGS},
#ifndef NO_VISIBLE
/* v start visible */ {v_start, CURSOR, INCL|VIZ},
#else
/* v not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS},
#endif
/* w move fwd word */ {m_fword, CURSOR, MVMT|INCL|VIZ},
/* x delete character */ {v_xchar, CURSOR, SDOT},
/* y yank text */ {v_yank, CURSOR_MOVED, NCOL|VIZ},
/* z adjust scrn row */ {m_z, CURSOR_CNT_KEY, NCOL|VIZ},
/* { back paragraph */ {m_paragraph, CURSOR, MVMT|LNMD|VIZ},
/* | move to column */ {m_tocol, CURSOR, MVMT|NREL|VIZ},
/* } fwd paragraph */ {m_paragraph, CURSOR, MVMT|LNMD|VIZ},
/* ~ upper/lowercase */ {v_ulcase, CURSOR, SDOT},
/* DEL not defined */ {NO_FUNC, NO_ARGS, NO_FLAGS}
};
void vi()
{
REG int key; /* keystroke from user */
long count; /* numeric argument to some functions */
REG struct keystru *keyptr;/* pointer to vikeys[] element */
MARK tcurs; /* temporary cursor */
int prevkey;/* previous key, if d/c/y/</>/! */
MARK range; /* start of range for d/c/y/</>/! */
char text[132];
int dotkey; /* last "key" of a change */
int dotpkey;/* last "prevkey" of a change */
int dotkey2;/* last extra "getkey()" of a change */
int dotcnt; /* last "count" of a change */
int firstkey;
REG int i;
/* tell the redraw() function to start from scratch */
redraw(MARK_UNSET, FALSE);
#ifdef lint
/* lint says that "range" might be used before it is set. This
* can't really happen due to the way "range" and "prevkey" are used,
* but lint doesn't know that. This line is here ONLY to keep lint
* happy.
*/
range = 0L;
#endif
/* safeguard against '.' with no previous command */
dotkey = dotpkey = dotkey2 = dotcnt = 0;
/* go immediately into insert mode, if ":set inputmode" */
firstkey = 0;
#ifndef NO_EXTENSIONS
if (*o_inputmode)
{
firstkey = 'i';
}
#endif
/* Repeatedly handle VI commands */
for (count = 0, prevkey = '\0'; mode == MODE_VI; )
{
/* if we've moved off the undoable line, then we can't undo it at all */
if (markline(cursor) != U_line)
{
U_line = 0L;
}
/* report any changes from the previous command */
if (rptlines >= *o_report)
{
redraw(cursor, FALSE);
msg("%ld line%s %s", rptlines, (rptlines==1?"":"s"), rptlabel);
}
rptlines = 0L;
/* get the next command key. It must be ASCII */
if (firstkey)
{
key = firstkey;
firstkey = 0;
}
else
{
do
{
key = getkey(WHEN_VICMD);
} while (key < 0 || key > 127);
}
/* Convert a doubled-up operator such as "dd" into "d_" */
if (prevkey && key == prevkey)
{
key = '_';
}
/* look up the structure describing this command */
keyptr = &vikeys[key];
/* '&' and uppercase operators always act like doubled */
if (!prevkey && keyptr->args == CURSOR_MOVED
&& (key == '&' || isupper(key)))
{
range = cursor;
prevkey = key;
key = '_';
keyptr = &vikeys[key];
}
#ifndef NO_VISIBLE
/* if we're in the middle of a v/V command, reject commands
* that aren't operators or movement commands
*/
if (V_from && !(keyptr->flags & VIZ))
{
beep();
prevkey = 0;
count = 0;
continue;
}
#endif
/* if we're in the middle of a d/c/y/</>/! command, reject
* anything but movement.
*/
if (prevkey && !(keyptr->flags & (MVMT|PTMV)))
{
beep();
prevkey = 0;
count = 0;
continue;
}
/* set the "dot" variables, if we're supposed to */
if (((keyptr->flags & SDOT)
|| (prevkey && vikeys[prevkey].flags & SDOT))
#ifndef NO_VISIBLE
&& !V_from
#endif
)
{
dotkey = key;
dotpkey = prevkey;
dotkey2 = '\0';
dotcnt = count;
/* remember the line before any changes are made */
if (U_line != markline(cursor))
{
U_line = markline(cursor);
strcpy(U_text, fetchline(U_line));
}
}
/* if this is "." then set other vars from the "dot" vars */
if (key == '.')
{
key = dotkey;
keyptr = &vikeys[key];
prevkey = dotpkey;
if (prevkey)
{
range = cursor;
}
if (count == 0)
{
count = dotcnt;
}
doingdot = TRUE;
/* remember the line before any changes are made */
if (U_line != markline(cursor))
{
U_line = markline(cursor);
strcpy(U_text, fetchline(U_line));
}
}
else
{
doingdot = FALSE;
}
/* process the key as a command */
tcurs = cursor;
force_flags = NO_FLAGS;
switch (keyptr->args & ARGSMASK)
{
case ZERO:
if (count == 0)
{
tcurs = cursor & ~(BLKSIZE - 1);
break;
}
/* else fall through & treat like other digits... */
case DIGIT:
count = count * 10 + key - '0';
break;
case KEYWORD:
/* if not on a keyword, fail */
pfetch(markline(cursor));
key = markidx(cursor);
if (!isalnum(ptext[key]))
{
tcurs = MARK_UNSET;
break;
}
/* find the start of the keyword */
while (key > 0 && isalnum(ptext[key - 1]))
{
key--;
}
tcurs = (cursor & ~(BLKSIZE - 1)) + key;
/* copy it into a buffer, and NUL-terminate it */
i = 0;
do
{
text[i++] = ptext[key++];
} while (isalnum(ptext[key]));
text[i] = '\0';
/* call the function */
tcurs = (*keyptr->func)(text, tcurs, count);
count = 0L;
break;
case NO_ARGS:
if (keyptr->func)
{
(*keyptr->func)();
}
else
{
beep();
}
count = 0L;
break;
case CURSOR:
tcurs = (*keyptr->func)(cursor, count, key, prevkey);
count = 0L;
break;
case CURSOR_CNT_KEY:
if (doingdot)
{
tcurs = (*keyptr->func)(cursor, count, dotkey2);
}
else
{
/* get a key */
i = getkey(KEYMODE(keyptr->args));
if (i == '\033') /* ESC */
{
count = 0;
tcurs = MARK_UNSET;
break; /* exit from "case CURSOR_CNT_KEY" */
}
else if (i == ctrl('V'))
{
i = getkey(0);
}
/* if part of an SDOT command, remember it */
if (keyptr->flags & SDOT
|| (prevkey && vikeys[prevkey].flags & SDOT))
{
dotkey2 = i;
}
/* do it */
tcurs = (*keyptr->func)(cursor, count, i);
}
count = 0L;
break;
case CURSOR_MOVED:
#ifndef NO_VISIBLE
if (V_from)
{
range = cursor;
tcurs = V_from;
count = 0L;
prevkey = key;
key = (V_linemd ? 'V' : 'v');
keyptr = &vikeys[key];
}
else
#endif
{
prevkey = key;
range = cursor;
force_flags = LNMD|INCL;
}
break;
case CURSOR_EOL:
prevkey = key;
/* a zero-length line needs special treatment */
pfetch(markline(cursor));
if (plen == 0)
{
/* act on a zero-length section of text */
range = tcurs = cursor;
key = '0';
}
else
{
/* act like CURSOR_MOVED with '$' movement */
range = cursor;
tcurs = m_rear(cursor, 1L);
key = '$';
}
count = 0L;
keyptr = &vikeys[key];
break;
case CURSOR_TEXT:
do
{
text[0] = key;
if (vgets(key, text + 1, sizeof text - 1) >= 0)
{
/* reassure user that <CR> was hit */
qaddch('\r');
refresh();
/* call the function with the text */
tcurs = (*keyptr->func)(cursor, text);
}
else
{
if (exwrote || mode == MODE_COLON)
{
redraw(MARK_UNSET, FALSE);
}
mode = MODE_VI;
}
} while (mode == MODE_COLON);
count = 0L;
break;
}
/* if that command took us out of vi mode, then exit the loop
* NOW, without tweaking the cursor or anything. This is very
* important when mode == MODE_QUIT.
*/
if (mode != MODE_VI)
{
break;
}
/* now move the cursor, as appropriate */
if (keyptr->args == CURSOR_MOVED)
{
/* the < and > keys have FRNT,
* but it shouldn't be applied yet
*/
tcurs = adjmove(cursor, tcurs, 0);
}
else
{
tcurs = adjmove(cursor, tcurs, (int)keyptr->flags | force_flags);
}
/* was that the end of a d/c/y/</>/! command? */
if (prevkey && ((keyptr->flags & MVMT)
#ifndef NO_VISIBLE
|| V_from
#endif
) && count == 0L)
{
#ifndef NO_VISIBLE
/* turn off the hilight */
V_from = 0L;
#endif
/* if the movement command failed, cancel operation */
if (tcurs == MARK_UNSET)
{
prevkey = 0;
count = 0;
continue;
}
/* make sure range=front and tcurs=rear. Either way,
* leave cursor=range since that's where we started.
*/
cursor = range;
if (tcurs < range)
{
range = tcurs;
tcurs = cursor;
}
/* The 'w' and 'W' destinations should never take us
* to the front of a line. Instead, they should take
* us only to the end of the preceding line.
*/
if ((keyptr->flags & (MVMT|NREL|LNMD|FRNT|INCL)) == MVMT
&& markline(range) < markline(tcurs)
&& (markline(tcurs) > nlines || tcurs == m_front(tcurs, 0L)))
{
tcurs = (tcurs & ~(BLKSIZE - 1)) - BLKSIZE;
pfetch(markline(tcurs));
tcurs += plen;
}
/* adjust for line mode & inclusion of last char/line */
i = (keyptr->flags | vikeys[prevkey].flags);
switch ((i | force_flags) & (INCL|LNMD))
{
case INCL:
tcurs++;
break;
case INCL|LNMD:
tcurs += BLKSIZE;
/* fall through... */
case LNMD:
range &= ~(BLKSIZE - 1);
tcurs &= ~(BLKSIZE - 1);
break;
}
/* run the function */
tcurs = (*vikeys[prevkey].func)(range, tcurs);
if (mode == MODE_VI)
{
(void)adjmove(cursor, cursor, 0);
cursor = adjmove(cursor, tcurs, (int)vikeys[prevkey].flags);
}
/* cleanup */
prevkey = 0;
}
else if (!prevkey)
{
if (tcurs != MARK_UNSET)
cursor = tcurs;
}
}
}
/* This function adjusts the MARK value that they return; here we make sure
* it isn't past the end of the line, and that the column hasn't been
* *accidentally* changed.
*/
MARK adjmove(old, new, flags)
MARK old; /* the cursor position before the command */
REG MARK new; /* the cursor position after the command */
int flags; /* various flags regarding cursor mvmt */
{
static int colno; /* the column number that we want */
REG char *text; /* used to scan through the line's text */
REG int i;
#ifdef DEBUG
watch();
#endif
/* if the command failed, bag it! */
if (new == MARK_UNSET)
{
beep();
return old;
}
/* if this is a non-relative movement, set the '' mark */
if (flags & NREL)
{
mark[26] = old;
}
/* make sure it isn't past the end of the file */
if (markline(new) < 1)
{
new = MARK_FIRST;
}
else if (markline(new) > nlines)
{
new = MARK_LAST;
}
/* fetch the new line */
pfetch(markline(new));
/* move to the front, if we're supposed to */
if (flags & FRNT)
{
new = m_front(new, 1L);
}
/* change the column#, or change the mark to suit the column# */
if (!(flags & NCOL))
{
/* change the column# */
i = markidx(new);
if (i == BLKSIZE - 1)
{
new &= ~(BLKSIZE - 1);
if (plen > 0)
{
new += plen - 1;
}
colno = BLKSIZE * 8; /* one heck of a big colno */
}
else if (plen > 0)
{
if (i >= plen)
{
new = (new & ~(BLKSIZE - 1)) + plen - 1;
}
colno = idx2col(new, ptext, FALSE);
}
else
{
new &= ~(BLKSIZE - 1);
colno = 0;
}
}
else
{
/* adjust the mark to get as close as possible to column# */
for (i = 0, text = ptext; i <= colno && *text; text++)
{
if (*text == '\t' && !*o_list)
{
i += *o_tabstop - (i % *o_tabstop);
}
else if (UCHAR(*text) < ' ' || *text == 127)
{
i += 2;
}
#ifndef NO_CHARATTR
else if (*o_charattr && text[0] == '\\' && text[1] == 'f' && text[2])
{
text += 2; /* plus one more in "for()" stmt */
}
#endif
else
{
i++;
}
}
if (text > ptext)
{
text--;
}
new = (new & ~(BLKSIZE - 1)) + (int)(text - ptext);
}
return new;
}
#ifdef DEBUG
watch()
{
static wasset;
if (*origname)
{
wasset = TRUE;
}
else if (wasset)
{
mode = MODE_EX;
msg("origname was clobbered");
endwin();
abort();
}
if (wasset && nlines == 0)
{
mode = MODE_EX;
msg("nlines=0");
endwin();
abort();
}
}
#endif
Reference in a new issue Copy permalink