50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
|
|
/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
|
|
* details. If they are missing then this copy is in violation of *
|
|
* the copyright conditions. */
|
|
|
|
/*
|
|
** lib_insdel.c
|
|
**
|
|
** The routine winsdel(win, n).
|
|
** positive n insert n lines above current line
|
|
** negative n delete n lines starting from current line
|
|
**
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "curses.priv.h"
|
|
#include "terminfo.h"
|
|
|
|
int
|
|
winsdelln(WINDOW *win, int n)
|
|
{
|
|
int ret, sscroll, stop, sbot;
|
|
|
|
T(("winsdel(%x,%d) called", win, n));
|
|
|
|
if (n == 0)
|
|
return OK;
|
|
if (n < 0 && win->_cury - n >= win->_maxy)
|
|
/* request to delete too many lines */
|
|
/* should we truncate to an appropriate number? */
|
|
return ERR;
|
|
|
|
sscroll = win->_scroll;
|
|
stop = win->_regtop;
|
|
sbot = win->_regbottom;
|
|
|
|
win->_scroll = TRUE;
|
|
win->_regtop = win->_cury;
|
|
if (win->_regtop > win->_regbottom)
|
|
win->_regbottom = win->_maxy;
|
|
|
|
ret = wscrl(win, -n);
|
|
|
|
win->_scroll = sscroll;
|
|
win->_regtop = stop;
|
|
win->_regbottom = sbot;
|
|
|
|
return ret;
|
|
}
|