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/* 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 <nterm.h>
int
winsdel(WINDOW *win, int n)
{
int line, i;
int touched = 0;
chtype *ptr, *temp;
chtype **saved;
chtype blank = ' ';
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;
saved = (chtype **)malloc(sizeof(chtype *) * abs(n));
if (n < 0) {
/* save overwritten lines */
for (i = 0; i < -n; i++)
saved[i] = win->_line[win->_regbottom-i];
/* delete n lines */
for (line = win->_regbottom; line >= win->_cury; line--)
win->_line[line] = win->_line[line+n];
/* restore saved lines and blank them */
for (i = 0, line = win->_regtop; line < win->_regtop-n; line++, i++) {
win->_line[line] = saved[i];
temp = win->_line[line];
for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
*ptr = blank;
}
}
if (n > 0) {
/* save overwritten lines */
for (i = 0; i < n; i++)
saved[i] = win->_line[win->_regtop+i];
/* insert n lines */
for (line = win->_regtop; line < win->_regtop + n; line++)
win->_line[line] = win->_line[line+n];
/* restore saved lines and blank them */
for (i = 0, line = win->_regtop + n; i < n; line--, i++) {
temp = win->_line[line] = saved[i];
for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
*ptr = blank;
}
}
free(saved);
/* as an optimization, if the window is COLS wide we can try
using idl assuming _idlok is true */
if (win->_maxx == columns && win->_idlok == TRUE) {
if (n > 0) {
mvcur(-1, -1, win->_cury, 0);
if (parm_insert_line) {
putp(tparm(parm_insert_line, n));
touched = 1;
} else if (insert_line) {
while (n--)
putp(insert_line);
touched = 1;
}
}
if (n < 0) {
mvcur(-1, -1, win->_cury, 0);
n = abs(n);
if (parm_delete_line) {
putp(tparm(parm_delete_line, n));
touched = 1;
} else if (delete_line) {
while (n--)
putp(delete_line);
touched = 1;
}
}
mvcur(-1, -1, win->_cury, win->_curx);
}
if (touched == 0)
touchline(win, win->_regtop, win->_regbottom - win->_regtop + 1);
touched = 0;
return OK;
}
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