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 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include "curses_inc.h"
44
45 /*
46 * Insert to 'win' at most n chars of a string
47 * starting at (cury, curx). However, if n <= 0,
48 * insert the entire string.
49 * \n, \t, \r, \b are treated in the same way
50 * as other control chars.
51 */
52
53 int
winsnstr(WINDOW * win,char * tsp,int n)54 winsnstr(WINDOW *win, char *tsp, int n)
55 {
56 chtype *wcp;
57 int x, cury, endx, maxx, len;
58 bool savscrl, savsync, savimmed;
59 short savx, savy;
60 unsigned char *sp = (unsigned char *)tsp;
61
62 /* only insert at the start of a character */
63 win->_nbyte = -1;
64 win->_insmode = TRUE;
65 if (_scrmax > 1 && _mbvalid(win) == ERR)
66 return (ERR);
67
68 if (n < 0)
69 n = MAXINT;
70
71 /* compute total length of the insertion */
72 endx = win->_curx;
73 maxx = win->_maxx;
74 for (x = 0; sp[x] != '\0' && x < n && endx < maxx; ++x) {
75 len = (sp[x] < ' '|| sp[x] == _CTRL('?')) ? 2 : 1;
76
77 if (ISMBIT(sp[x])) {
78 int m, k, ty;
79 chtype c;
80
81 /* see if the entire character is defined */
82 c = RBYTE(sp[x]);
83 ty = TYPE(c);
84 m = x + cswidth[ty] - (ty == 0 ? 1 : 0);
85 for (k = x + 1; sp[k] != '\0' && k <= m; ++k) {
86 c = RBYTE(sp[k]);
87 if (TYPE(c) != 0)
88 break;
89 }
90 if (k <= m)
91 break;
92 /* recompute # of columns used */
93 len = _curs_scrwidth[ty];
94 /* skip an appropriate number of bytes */
95 x = m;
96 }
97
98 if ((endx += len) > maxx) {
99 endx -= len;
100 break;
101 }
102 }
103
104 /* length of chars to be shifted */
105 if ((len = endx - win->_curx) <= 0)
106 return (ERR);
107
108 /* number of chars insertible */
109 n = x;
110
111 /* shift data */
112 cury = win->_cury;
113
114 if (_mbinsshift(win, len) == ERR)
115 return (ERR);
116
117 /* insert new data */
118 wcp = win->_y[cury] + win->_curx;
119
120 /* act as if we are adding characters */
121 savx = win->_curx;
122 savy = win->_cury;
123 win->_insmode = FALSE;
124 savscrl = win->_scroll;
125 savimmed = win->_immed;
126 savsync = win->_sync;
127 win->_scroll = win->_sync;
128
129 for (; n > 0; --n, ++sp) {
130 /* multi-byte characters */
131 if (_mbtrue && ISMBIT(*sp)) {
132 (void) _mbaddch(win, A_NORMAL, RBYTE(*sp));
133 wcp = win->_y[cury] + win->_curx;
134 continue;
135 }
136 if (_scrmax > 1 && ISMBIT(*wcp))
137 (void) _mbclrch(win, cury, win->_curx);
138 /* single byte character */
139 win->_nbyte = -1;
140
141 if (*sp < ' ' || *sp == _CTRL('?')) {
142 *wcp++ = _CHAR('^') | win->_attrs;
143 *wcp = _CHAR(_UNCTRL(*sp)) | win->_attrs;
144 } else
145 *wcp = _CHAR(*sp) | win->_attrs;
146 win->_curx += (*sp < ' ' || *sp == _CTRL('?')) ? 2 : 1;
147 ++wcp;
148 }
149 win->_curx = savx;
150 win->_cury = savy;
151
152 /* update the change structure */
153 if (win->_firstch[cury] > win->_curx)
154 win->_firstch[cury] = win->_curx;
155 win->_lastch[cury] = maxx - 1;
156
157 win->_flags |= _WINCHANGED;
158
159 win->_scroll = savscrl;
160 win->_sync = savsync;
161 win->_immed = savimmed;
162
163 if (win->_sync)
164 wsyncup(win);
165 return (win->_immed ? wrefresh(win) : OK);
166 }
167