/*
* make sure curwin->w_cursor in on a valid character
*/
void check_cursor(void)
{
check_cursor_lnum();
check_cursor_col();
}
static int
luaV_buffer_newindex(lua_State *L)
{
buf_T *b = (buf_T *) luaV_checkvalid(L, luaV_Buffer, 1);
linenr_T n = (linenr_T) luaL_checkinteger(L, 2);
#ifdef HAVE_SANDBOX
luaV_checksandbox(L);
#endif
if (n < 1 || n > b->b_ml.ml_line_count)
luaL_error(L, "invalid line number");
if (lua_isnil(L, 3)) /* delete line */
{
buf_T *buf = curbuf;
curbuf = b;
if (u_savedel(n, 1L) == FAIL)
{
curbuf = buf;
luaL_error(L, "cannot save undo information");
}
else if (ml_delete(n, FALSE) == FAIL)
{
curbuf = buf;
luaL_error(L, "cannot delete line");
}
else {
deleted_lines_mark(n, 1L);
if (b == curwin->w_buffer) /* fix cursor in current window? */
{
if (curwin->w_cursor.lnum >= n)
{
if (curwin->w_cursor.lnum > n)
{
curwin->w_cursor.lnum -= 1;
check_cursor_col();
}
else check_cursor();
changed_cline_bef_curs();
}
invalidate_botline();
}
}
curbuf = buf;
}
else if (lua_isstring(L, 3)) /* update line */
{
buf_T *buf = curbuf;
curbuf = b;
if (u_savesub(n) == FAIL)
{
curbuf = buf;
luaL_error(L, "cannot save undo information");
}
else if (ml_replace(n, luaV_toline(L, 3), TRUE) == FAIL)
{
curbuf = buf;
luaL_error(L, "cannot replace line");
}
else changed_bytes(n, 0);
curbuf = buf;
if (b == curwin->w_buffer)
check_cursor_col();
}
else
luaL_error(L, "wrong argument to change line");
return 0;
}