wins_wch.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
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#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/* LINTLIBRARY */
30
31/*
32 * wins_wch.c
33 *
34 * XCurses Library
35 *
36 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
37 *
38 */
39
40#ifdef M_RCSID
41#ifndef lint
42static char rcsID[] =
43"$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
44"libxcurses/src/libc/xcurses/rcs/wins_wch.c 1.3 1998/06/04 17:54:38 "
45"cbates Exp $";
46#endif
47#endif
48
49#include <private.h>
50#include <string.h>
51
52/*
53 * Insert a character into a window line, shifting the line right
54 * the column width of the inserted character.  The right most columns
55 * will be truncated according to the width of the character inserted.
56 */
57int
58__m_cc_ins(WINDOW *w, int y, int x, const cchar_t *cc)
59{
60	int	width;
61
62	/* Determine the character width to insert. */
63	if ((width = __m_cc_width(cc)) <= 0 || w->_maxx < x + width)
64		return (-1);
65
66	x = __m_cc_first(w, y, x);
67
68	/*
69	 * Use erase to remove possible multi-column chars
70	 * before memmove clobbers them
71	 */
72	(void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1);
73
74	/* Insert a "hole" into the line. */
75	(void) memmove(&w->_line[y][x + width], &w->_line[y][x],
76		(w->_maxx - x - width) * sizeof (**w->_line));
77
78	/* Write the character into the hole. */
79	if (__m_cc_replace(w, y, x, cc, 0) != width)
80		return (-1);
81
82	/* Update dirty region markers. */
83	if (x < w->_first[y])
84		w->_first[y] = (short) x;
85	w->_last[y] = w->_maxx;
86
87	/*
88	 * If the last character on the line is incomplete,
89	 * blank it out.
90	 */
91	x = __m_cc_first(w, y, w->_maxx-1);
92	if (w->_maxx < x + __m_cc_width(&w->_line[y][x]))
93		(void) __m_cc_erase(w, y, x, y, w->_maxx-1);
94
95	return (width);
96}
97
98/*
99 * Special internal version of wins_wch() that can track the cursor
100 * position to facilitate inserting strings containing special characters
101 * like \b, \n, \r, and \t.
102 */
103int
104__m_wins_wch(WINDOW *w, int y, int x, const cchar_t *cc,
105	int *yp, int *xp)
106{
107	cchar_t	uc;
108	const wchar_t	*p;
109	int	code, nx, width;
110
111	code = ERR;
112
113	switch (cc->_wc[0]) {
114	case L'\r':
115		x = 0;
116		break;
117	case L'\b':
118		if (0 < x)
119			--x;
120		break;
121	case L'\t':
122		for (nx = x + (8 - (x & 07)); x < nx; x += width)
123			if ((width = __m_cc_ins(w, y, x, &w->_bg)) <= 0)
124				goto error;
125		break;
126	case L'\n':
127		/* Truncate the tail of the current line. */
128		if (__m_cc_erase(w, y, x, y, w->_maxx - 1) == -1)
129			goto error;
130
131		if (__m_do_scroll(w, y, x, &y, &x) == ERR)
132			goto error;
133		break;
134	default:
135		if (iswprint(cc->_wc[0])) {
136			if ((width = __m_cc_ins(w, y, x, cc)) <= 0)
137				goto error;
138			x += width;
139			break;
140		}
141
142		/* Convert non-printables into printable representation. */
143		uc._n = 1;
144		uc._at = cc->_at;
145		uc._co = cc->_co;
146
147		if ((p = wunctrl((cchar_t *)cc)) == NULL)
148			goto error;
149
150		for (; *p != '\0'; ++p, x += width) {
151			uc._wc[0] = *p;
152			if ((width = __m_cc_ins(w, y, x, &uc)) < 0)
153				goto error;
154		}
155	}
156
157	if (yp != NULL)
158		*yp = y;
159	if (xp != NULL)
160		*xp = x;
161
162	WSYNC(w);
163
164	code = WFLUSH(w);
165error:
166	return (code);
167}
168
169/*
170 * Insert a character (with attributes) before the cursor. All
171 * characters to the right of the cursor are moved one space to
172 * the right, with a possibility of the rightmost character on
173 * the line being lost.  The cursor position does not change.
174 */
175int
176wins_wch(WINDOW *w, const cchar_t *cc)
177{
178	int	code;
179
180	code = __m_wins_wch(w, w->_cury, w->_curx, cc, NULL, NULL);
181
182	return (code);
183}
184