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/*
* 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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <curses.h>
#include "wish.h"
#include "token.h"
#include "winp.h"
#include "fmacs.h"
#include "terror.h"
extern int *acsreadline();
extern void acswputchar();
extern void acsputstring();
extern char *fputstring();
/*
* GROWBUF will increase the scroll buffer by size
*/
void
growbuf(size)
int size;
{
unsigned oldbuffsize;
oldbuffsize = Buffsize;
if (Scrollbuf == NULL) {
if ((Scrollbuf = /* added +1 abs k15 */
(chtype *)malloc((size +1) * sizeof(*Scrollbuf))) == NULL)
fatal(NOMEM, "");
Buffoffset = 0;
Bufflast = size;
}
else if (Buffsize != size) {
if ((Scrollbuf = (chtype *) /* added +1 abs k15 */
realloc(Scrollbuf, (size +1) * sizeof(*Scrollbuf))) == NULL)
fatal(NOMEM, "");
}
if ((Buffsize = size) > oldbuffsize) /* initialize new block */
memset((char *)(Scrollbuf + oldbuffsize), 0,
(Buffsize - oldbuffsize +1) * sizeof(*Scrollbuf)); /* +1 abs k15 */
}
int
free_scroll_buf(fld)
ifield *fld;
{
if (fld->scrollbuf)
free(fld->scrollbuf);
fld->scrollbuf = NULL;
fld->buffsize = 0;
fld->buffoffset = 0;
fld->bufflast = 0;
return (0);
}
/*
* SYNCBUF will syncronize the window map with the scroll buffer
*/
void
syncbuf(offset, start, end)
unsigned offset;
int start;
int end;
{
register chtype *currptr;
register int i;
int saverow, savecol;
saverow = Cfld->currow;
savecol = Cfld->curcol;
if (Scrollbuf == NULL)
growbuf(FIELDBYTES); /* initialize scroll buffer */
currptr = Scrollbuf + offset;
if (Currtype == SINGLE) {
if ((offset + Cfld->cols) >= Bufflast)
Bufflast = offset + (unsigned)acsreadline(0, currptr, TRUE);
else
acsreadline(0, currptr, FALSE);
}
else {
for (i = start; i <= end; i++, currptr += LINEBYTES)
acsreadline(i, currptr, TRUE);
}
fgo(saverow, savecol);
}
/*
* CLEARBUF will clear the scroll buffer
*/
void
clearbuf()
{
/*
* clear scroll buffer from current cursor position to end of field
*/
syncbuf(Buffoffset, 0, Fieldrows - 1); /* added +1 on next line. abs f15 */
Bufflast = Buffoffset + (Currtype == SINGLE ? Cfld->cols : FIELDBYTES);
/* actually shrinks scroll buffer... was growbuf(Buffsize) abs k15 */
growbuf(Buffoffset + (Currtype == SINGLE ? Cfld->cols : FIELDBYTES));
setarrows();
}
/*
* SHIFTBUF will shift the scroll buffer in the specified direction
*/
void
shiftbuf(direction)
int direction;
{
register chtype *sptr;
int startcol, startrow;
int saverow, savecol;
saverow = Cfld->currow;
savecol = Cfld->curcol;
if (Scrollbuf == NULL)
growbuf(FIELDBYTES);
switch(direction) {
case UP:
if ((startrow = Buffoffset + FIELDBYTES) >= Bufflast) {
/* end of scroll buffer, see if there is more text */
if (Valptr) {
fgo(LASTROW, 0);
Valptr = (char *) fputstring(Valptr);
}
}
else {
Bufflast -= LINEBYTES;
sptr = Scrollbuf + startrow;
fgo(LASTROW, 0);
acsputstring(sptr);
memshift((char *)sptr, (char *)(sptr + LINEBYTES)
, (Bufflast - startrow) * sizeof(*sptr));
}
break;
case DOWN:
startrow = Buffoffset + FIELDBYTES;
if ((Bufflast + LINEBYTES) > Buffsize)
growbuf(Buffsize + FIELDBYTES);
sptr = Scrollbuf + startrow;
memshift((char *)(sptr + LINEBYTES), (char *)sptr,
(Bufflast - startrow) * sizeof(*sptr));
Bufflast += LINEBYTES;
acsreadline(LASTROW, sptr, TRUE);
break;
case LEFT:
/*
* If this is the last page then there is no "off-screen"
* text to shift.
*/
if ((startcol = Buffoffset + Cfld->cols) >= Bufflast)
return;
sptr = Scrollbuf + startcol;
fgo(0, LASTCOL);
acswputchar(*sptr); /* print character shifted in */
memshift((char *)sptr, (char *)(sptr + 1),
(Bufflast - startcol) * sizeof(*sptr));
Bufflast--;
break;
case RIGHT:
/*
* If this is the last page then there is no "off-screen"
* text to shift.
*/
if ((startcol = Buffoffset + Cfld->cols) > ++Bufflast)
return;
if (Bufflast >= Buffsize)
growbuf(Buffsize + Cfld->cols);
sptr = Scrollbuf + startcol;
memshift((char *)(sptr + 1), (char *)sptr,
(Bufflast - startcol) * sizeof(*sptr));
*sptr = acsreadchar(0, LASTCOL); /* character shifted out */
}
setarrows();
fgo(saverow, savecol);
}
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