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insch.c revision 1.16 
      1 /*	$NetBSD: insch.c,v 1.16 2002/01/02 10:38:28 blymn Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)insch.c	8.2 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: insch.c,v 1.16 2002/01/02 10:38:28 blymn Exp $");
     42 #endif
     43 #endif				/* not lint */
     44 
     45 #include <string.h>
     46 
     47 #include "curses.h"
     48 #include "curses_private.h"
     49 
     50 #ifndef _CURSES_USE_MACROS
     51 
     52 /*
     53  * insch --
     54  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     55  */
     56 int
     57 insch(chtype ch)
     58 {
     59 	return winsch(stdscr, ch);
     60 }
     61 
     62 /*
     63  * mvinsch --
     64  *      Do an insert-char on the line at (y, x).
     65  */
     66 int
     67 mvinsch(int y, int x, chtype ch)
     68 {
     69 	return mvwinsch(stdscr, y, x, ch);
     70 }
     71 
     72 /*
     73  * mvwinsch --
     74  *      Do an insert-char on the line at (y, x) in the given window.
     75  */
     76 int
     77 mvwinsch(WINDOW *win, int y, int x, chtype ch)
     78 {
     79 	if (wmove(win, y, x) == ERR)
     80 		return ERR;
     81 
     82 	return winsch(stdscr, ch);
     83 }
     84 
     85 #endif
     86 
     87 /*
     88  * winsch --
     89  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     90  */
     91 int
     92 winsch(WINDOW *win, chtype ch)
     93 {
     94 
     95 	__LDATA	*end, *temp1, *temp2;
     96 
     97 	end = &win->lines[win->cury]->line[win->curx];
     98 	temp1 = &win->lines[win->cury]->line[win->maxx - 1];
     99 	temp2 = temp1 - 1;
    100 	while (temp1 > end) {
    101 		(void) memcpy(temp1, temp2, sizeof(__LDATA));
    102 		temp1--, temp2--;
    103 	}
    104 	temp1->ch = (wchar_t) ch & __CHARTEXT;
    105 	temp1->bch = win->bch;
    106 	temp1->attr = (attr_t) ch & __ATTRIBUTES;
    107 	temp1->battr = win->battr;
    108 	__touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1);
    109 	if (win->cury == LINES - 1 &&
    110 	    (win->lines[LINES - 1]->line[COLS - 1].ch != ' ' ||
    111 	        win->lines[LINES - 1]->line[COLS - 1].bch != ' ' ||
    112 		win->lines[LINES - 1]->line[COLS - 1].attr != 0 ||
    113 		win->lines[LINES - 1]->line[COLS - 1].battr != 0)) {
    114 		if (win->flags & __SCROLLOK) {
    115 			wrefresh(win);
    116 			scroll(win);
    117 			win->cury--;
    118 		} else
    119 			return (ERR);
    120 	}
    121 	return (OK);
    122 }
    123