360 lines
8.3 KiB
C
360 lines
8.3 KiB
C
|
/*-
|
||
|
|
* Copyright (c) 1992, 1993, 1994
|
||
|
|
* The Regents of the University of California. All rights reserved.
|
||
|
|
* Copyright (c) 1992, 1993, 1994, 1995, 1996
|
||
|
|
* Keith Bostic. All rights reserved.
|
||
|
|
*
|
||
|
|
* See the LICENSE file for redistribution information.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#ifndef lint
|
||
|
|
static const char sccsid[] = "@(#)v_sentence.c 10.7 (Berkeley) 3/6/96";
|
||
|
|
#endif /* not lint */
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/queue.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
|
||
|
|
#include <bitstring.h>
|
||
|
|
#include <ctype.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#include "../common/common.h"
|
||
|
|
#include "vi.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* In historic vi, a sentence was delimited by a '.', '?' or '!' character
|
||
|
|
* followed by TWO spaces or a newline. One or more empty lines was also
|
||
|
|
* treated as a separate sentence. The Berkeley documentation for historical
|
||
|
|
* vi states that any number of ')', ']', '"' and '\'' characters can be
|
||
|
|
* between the delimiter character and the spaces or end of line, however,
|
||
|
|
* the historical implementation did not handle additional '"' characters.
|
||
|
|
* We follow the documentation here, not the implementation.
|
||
|
|
*
|
||
|
|
* Once again, historical vi didn't do sentence movements associated with
|
||
|
|
* counts consistently, mostly in the presence of lines containing only
|
||
|
|
* white-space characters.
|
||
|
|
*
|
||
|
|
* This implementation also permits a single tab to delimit sentences, and
|
||
|
|
* treats lines containing only white-space characters as empty lines.
|
||
|
|
* Finally, tabs are eaten (along with spaces) when skipping to the start
|
||
|
|
* of the text following a "sentence".
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* v_sentencef -- [count])
|
||
|
|
* Move forward count sentences.
|
||
|
|
*
|
||
|
|
* PUBLIC: int v_sentencef __P((SCR *, VICMD *));
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
v_sentencef(sp, vp)
|
||
|
|
SCR *sp;
|
||
|
|
VICMD *vp;
|
||
|
|
{
|
||
|
|
enum { BLANK, NONE, PERIOD } state;
|
||
|
|
VCS cs;
|
||
|
|
size_t len;
|
||
|
|
u_long cnt;
|
||
|
|
|
||
|
|
cs.cs_lno = vp->m_start.lno;
|
||
|
|
cs.cs_cno = vp->m_start.cno;
|
||
|
|
if (cs_init(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
|
||
|
|
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* If in white-space, the next start of sentence counts as one.
|
||
|
|
* This may not handle " . " correctly, but it's real unclear
|
||
|
|
* what correctly means in that case.
|
||
|
|
*/
|
||
|
|
if (cs.cs_flags == CS_EMP || cs.cs_flags == 0 && isblank(cs.cs_ch)) {
|
||
|
|
if (cs_fblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (--cnt == 0) {
|
||
|
|
if (vp->m_start.lno != cs.cs_lno ||
|
||
|
|
vp->m_start.cno != cs.cs_cno)
|
||
|
|
goto okret;
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (state = NONE;;) {
|
||
|
|
if (cs_next(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags == CS_EOF)
|
||
|
|
break;
|
||
|
|
if (cs.cs_flags == CS_EOL) {
|
||
|
|
if ((state == PERIOD || state == BLANK) && --cnt == 0) {
|
||
|
|
if (cs_next(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags == 0 &&
|
||
|
|
isblank(cs.cs_ch) && cs_fblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
goto okret;
|
||
|
|
}
|
||
|
|
state = NONE;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (cs.cs_flags == CS_EMP) { /* An EMP is two sentences. */
|
||
|
|
if (--cnt == 0)
|
||
|
|
goto okret;
|
||
|
|
if (cs_fblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (--cnt == 0)
|
||
|
|
goto okret;
|
||
|
|
state = NONE;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
switch (cs.cs_ch) {
|
||
|
|
case '.':
|
||
|
|
case '?':
|
||
|
|
case '!':
|
||
|
|
state = PERIOD;
|
||
|
|
break;
|
||
|
|
case ')':
|
||
|
|
case ']':
|
||
|
|
case '"':
|
||
|
|
case '\'':
|
||
|
|
if (state != PERIOD)
|
||
|
|
state = NONE;
|
||
|
|
break;
|
||
|
|
case '\t':
|
||
|
|
if (state == PERIOD)
|
||
|
|
state = BLANK;
|
||
|
|
/* FALLTHROUGH */
|
||
|
|
case ' ':
|
||
|
|
if (state == PERIOD) {
|
||
|
|
state = BLANK;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (state == BLANK && --cnt == 0) {
|
||
|
|
if (cs_fblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
goto okret;
|
||
|
|
}
|
||
|
|
/* FALLTHROUGH */
|
||
|
|
default:
|
||
|
|
state = NONE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* EOF is a movement sink, but it's an error not to have moved. */
|
||
|
|
if (vp->m_start.lno == cs.cs_lno && vp->m_start.cno == cs.cs_cno) {
|
||
|
|
v_eof(sp, NULL);
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
okret: vp->m_stop.lno = cs.cs_lno;
|
||
|
|
vp->m_stop.cno = cs.cs_cno;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* Historic, uh, features, yeah, that's right, call 'em features.
|
||
|
|
* If the starting and ending cursor positions are at the first
|
||
|
|
* column in their lines, i.e. the movement is cutting entire lines,
|
||
|
|
* the buffer is in line mode, and the ending position is the last
|
||
|
|
* character of the previous line. Note check to make sure that
|
||
|
|
* it's not within a single line.
|
||
|
|
*
|
||
|
|
* Non-motion commands move to the end of the range. Delete and
|
||
|
|
* yank stay at the start. Ignore others. Adjust the end of the
|
||
|
|
* range for motion commands.
|
||
|
|
*/
|
||
|
|
if (ISMOTION(vp)) {
|
||
|
|
if (vp->m_start.cno == 0 &&
|
||
|
|
(cs.cs_flags != 0 || vp->m_stop.cno == 0)) {
|
||
|
|
if (vp->m_start.lno < vp->m_stop.lno) {
|
||
|
|
if (db_get(sp,
|
||
|
|
--vp->m_stop.lno, DBG_FATAL, NULL, &len))
|
||
|
|
return (1);
|
||
|
|
vp->m_stop.cno = len ? len - 1 : 0;
|
||
|
|
}
|
||
|
|
F_SET(vp, VM_LMODE);
|
||
|
|
} else
|
||
|
|
--vp->m_stop.cno;
|
||
|
|
vp->m_final = vp->m_start;
|
||
|
|
} else
|
||
|
|
vp->m_final = vp->m_stop;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* v_sentenceb -- [count](
|
||
|
|
* Move backward count sentences.
|
||
|
|
*
|
||
|
|
* PUBLIC: int v_sentenceb __P((SCR *, VICMD *));
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
v_sentenceb(sp, vp)
|
||
|
|
SCR *sp;
|
||
|
|
VICMD *vp;
|
||
|
|
{
|
||
|
|
VCS cs;
|
||
|
|
recno_t slno;
|
||
|
|
size_t len, scno;
|
||
|
|
u_long cnt;
|
||
|
|
int last;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* Historic vi permitted the user to hit SOF repeatedly.
|
||
|
|
*/
|
||
|
|
if (vp->m_start.lno == 1 && vp->m_start.cno == 0)
|
||
|
|
return (0);
|
||
|
|
|
||
|
|
cs.cs_lno = vp->m_start.lno;
|
||
|
|
cs.cs_cno = vp->m_start.cno;
|
||
|
|
if (cs_init(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
|
||
|
|
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* In empty lines, skip to the previous non-white-space character.
|
||
|
|
* If in text, skip to the prevous white-space character. Believe
|
||
|
|
* it or not, in the paragraph:
|
||
|
|
* ab cd.
|
||
|
|
* AB CD.
|
||
|
|
* if the cursor is on the 'A' or 'B', ( moves to the 'a'. If it
|
||
|
|
* is on the ' ', 'C' or 'D', it moves to the 'A'. Yes, Virginia,
|
||
|
|
* Berkeley was once a major center of drug activity.
|
||
|
|
*/
|
||
|
|
if (cs.cs_flags == CS_EMP) {
|
||
|
|
if (cs_bblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
for (;;) {
|
||
|
|
if (cs_prev(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags != CS_EOL)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else if (cs.cs_flags == 0 && !isblank(cs.cs_ch))
|
||
|
|
for (;;) {
|
||
|
|
if (cs_prev(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags != 0 || isblank(cs.cs_ch))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (last = 0;;) {
|
||
|
|
if (cs_prev(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags == CS_SOF) /* SOF is a movement sink. */
|
||
|
|
break;
|
||
|
|
if (cs.cs_flags == CS_EOL) {
|
||
|
|
last = 1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (cs.cs_flags == CS_EMP) {
|
||
|
|
if (--cnt == 0)
|
||
|
|
goto ret;
|
||
|
|
if (cs_bblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
last = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
switch (cs.cs_ch) {
|
||
|
|
case '.':
|
||
|
|
case '?':
|
||
|
|
case '!':
|
||
|
|
if (!last || --cnt != 0) {
|
||
|
|
last = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret: slno = cs.cs_lno;
|
||
|
|
scno = cs.cs_cno;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Move to the start of the sentence, skipping blanks
|
||
|
|
* and special characters.
|
||
|
|
*/
|
||
|
|
do {
|
||
|
|
if (cs_next(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
} while (!cs.cs_flags &&
|
||
|
|
(cs.cs_ch == ')' || cs.cs_ch == ']' ||
|
||
|
|
cs.cs_ch == '"' || cs.cs_ch == '\''));
|
||
|
|
if ((cs.cs_flags || isblank(cs.cs_ch)) &&
|
||
|
|
cs_fblank(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If it was ". xyz", with the cursor on the 'x', or
|
||
|
|
* "end. ", with the cursor in the spaces, or the
|
||
|
|
* beginning of a sentence preceded by an empty line,
|
||
|
|
* we can end up where we started. Fix it.
|
||
|
|
*/
|
||
|
|
if (vp->m_start.lno != cs.cs_lno ||
|
||
|
|
vp->m_start.cno != cs.cs_cno)
|
||
|
|
goto okret;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Well, if an empty line preceded possible blanks
|
||
|
|
* and the sentence, it could be a real sentence.
|
||
|
|
*/
|
||
|
|
for (;;) {
|
||
|
|
if (cs_prev(sp, &cs))
|
||
|
|
return (1);
|
||
|
|
if (cs.cs_flags == CS_EOL)
|
||
|
|
continue;
|
||
|
|
if (cs.cs_flags == 0 && isblank(cs.cs_ch))
|
||
|
|
continue;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (cs.cs_flags == CS_EMP)
|
||
|
|
goto okret;
|
||
|
|
|
||
|
|
/* But it wasn't; try again. */
|
||
|
|
++cnt;
|
||
|
|
cs.cs_lno = slno;
|
||
|
|
cs.cs_cno = scno;
|
||
|
|
last = 0;
|
||
|
|
break;
|
||
|
|
case '\t':
|
||
|
|
last = 1;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
last =
|
||
|
|
cs.cs_flags == CS_EOL || isblank(cs.cs_ch) ||
|
||
|
|
cs.cs_ch == ')' || cs.cs_ch == ']' ||
|
||
|
|
cs.cs_ch == '"' || cs.cs_ch == '\'' ? 1 : 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
okret: vp->m_stop.lno = cs.cs_lno;
|
||
|
|
vp->m_stop.cno = cs.cs_cno;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* !!!
|
||
|
|
* If the starting and stopping cursor positions are at the first
|
||
|
|
* columns in the line, i.e. the movement is cutting an entire line,
|
||
|
|
* the buffer is in line mode, and the starting position is the last
|
||
|
|
* character of the previous line.
|
||
|
|
*
|
||
|
|
* All commands move to the end of the range. Adjust the start of
|
||
|
|
* the range for motion commands.
|
||
|
|
*/
|
||
|
|
if (ISMOTION(vp))
|
||
|
|
if (vp->m_start.cno == 0 &&
|
||
|
|
(cs.cs_flags != 0 || vp->m_stop.cno == 0)) {
|
||
|
|
if (db_get(sp,
|
||
|
|
--vp->m_start.lno, DBG_FATAL, NULL, &len))
|
||
|
|
return (1);
|
||
|
|
vp->m_start.cno = len ? len - 1 : 0;
|
||
|
|
F_SET(vp, VM_LMODE);
|
||
|
|
} else
|
||
|
|
--vp->m_start.cno;
|
||
|
|
vp->m_final = vp->m_stop;
|
||
|
|
return (0);
|
||
|
|
}
|