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insch.c revision 1.19 
      1 /*	$NetBSD: insch.c,v 1.19 2006/01/26 07:26:37 jdc 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)insch.c	8.2 (Berkeley) 5/4/94";
     36 #else
     37 __RCSID("$NetBSD: insch.c,v 1.19 2006/01/26 07:26:37 jdc Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include <string.h>
     42 
     43 #include "curses.h"
     44 #include "curses_private.h"
     45 
     46 #ifndef _CURSES_USE_MACROS
     47 
     48 /*
     49  * insch --
     50  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     51  */
     52 int
     53 insch(chtype ch)
     54 {
     55 	return winsch(stdscr, ch);
     56 }
     57 
     58 /*
     59  * mvinsch --
     60  *      Do an insert-char on the line at (y, x).
     61  */
     62 int
     63 mvinsch(int y, int x, chtype ch)
     64 {
     65 	return mvwinsch(stdscr, y, x, ch);
     66 }
     67 
     68 /*
     69  * mvwinsch --
     70  *      Do an insert-char on the line at (y, x) in the given window.
     71  */
     72 int
     73 mvwinsch(WINDOW *win, int y, int x, chtype ch)
     74 {
     75 	if (wmove(win, y, x) == ERR)
     76 		return ERR;
     77 
     78 	return winsch(stdscr, ch);
     79 }
     80 
     81 #endif
     82 
     83 /*
     84  * winsch --
     85  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     86  */
     87 int
     88 winsch(WINDOW *win, chtype ch)
     89 {
     90 
     91 	__LDATA	*end, *temp1, *temp2;
     92 	attr_t attr;
     93 
     94 	if (__using_color)
     95 		attr = win->battr & __COLOR;
     96 	else
     97 		attr = 0;
     98 	end = &win->lines[win->cury]->line[win->curx];
     99 	temp1 = &win->lines[win->cury]->line[win->maxx - 1];
    100 	temp2 = temp1 - 1;
    101 	while (temp1 > end) {
    102 		(void) memcpy(temp1, temp2, sizeof(__LDATA));
    103 		temp1--, temp2--;
    104 	}
    105 	temp1->ch = (wchar_t) ch & __CHARTEXT;
    106 	if (temp1->ch == ' ')
    107 		temp1->ch = win->bch;
    108 	temp1->attr = (attr_t) ch & __ATTRIBUTES;
    109 	if (temp1->attr & __COLOR)
    110 		temp1->attr |= (win->bch & ~__COLOR);
    111 	else
    112 		temp1->attr |= win->bch;
    113 	__touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1);
    114 	if (win->cury == LINES - 1 &&
    115 	    (win->lines[LINES - 1]->line[COLS - 1].ch != ' ' ||
    116 		win->lines[LINES - 1]->line[COLS - 1].attr != attr)) {
    117 		if (win->flags & __SCROLLOK) {
    118 			wrefresh(win);
    119 			scroll(win);
    120 			win->cury--;
    121 		} else
    122 			return (ERR);
    123 	}
    124 	return (OK);
    125 }
    126