1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1995-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 /* LINTLIBRARY */
28
29 /*
30 * wdelch.c
31 *
32 * XCurses Library
33 *
34 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
35 *
36 */
37
38 #ifdef M_RCSID
39 #ifndef lint
40 static char rcsID[] =
41 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
42 "libxcurses/src/libc/xcurses/rcs/wdelch.c 1.3 1998/05/26 14:22:13 "
43 "cbates Exp $";
44 #endif
45 #endif
46
47 #include <private.h>
48 #include <string.h>
49
50 /*
51 * Delete the character under the cursor; all characters to the right of
52 * the cursor on the same line are moved to the left by one position and
53 * the last character on the line is filled with a blank. The cursor
54 * position does not change.
55 */
56 int
wdelch(WINDOW * w)57 wdelch(WINDOW *w)
58 {
59 int next, width, y, x;
60
61 y = w->_cury;
62 x = w->_curx;
63
64 next = __m_cc_next(w, y, x);
65 x = __m_cc_first(w, y, x);
66
67 /* Determine the character width to delete. */
68 width = __m_cc_width(&w->_line[y][x]);
69
70 /* Shift line left to erase the character under the cursor. */
71 (void) memcpy(&w->_line[y][x], &w->_line[y][next],
72 (w->_maxx - next) * sizeof (**w->_line));
73
74 /*
75 * Add blank(s) to the end of line based on the width
76 * of the character that was deleted.
77 */
78 (void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1);
79
80 /* Set dity region markers. */
81 if (x < w->_first[y])
82 w->_first[y] = (short) x;
83 w->_last[y] = w->_maxx;
84
85 WSYNC(w);
86
87 return (WFLUSH(w));
88 }
89