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 2004 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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 /*
45  * This routine writes parts of Srcwin onto Dstwin,
46  * either non-destructively (over_lay = TRUE) or destructively
47  * (over_lay = FALSE).
48  */
49 
50 #include	<string.h>
51 #include	<sys/types.h>
52 #include	"curses_inc.h"
53 
54 int
copywin(WINDOW * Srcwin,WINDOW * Dstwin,int minRowSrc,int minColSrc,int minRowDst,int minColDst,int maxRowDst,int maxColDst,int over_lay)55 copywin(WINDOW *Srcwin, WINDOW *Dstwin,
56 	int minRowSrc, int minColSrc, int minRowDst,
57 	int minColDst, int maxRowDst, int maxColDst,
58 	int over_lay)
59 {
60 	int		ySrc, yDst, which_copy, t;
61 	int		height = (maxRowDst - minRowDst) + 1,
62 			width = (maxColDst - minColDst) + 1;
63 	chtype		**_yDst = Dstwin->_y, **_ySrc = Srcwin->_y,
64 			bkSrc = Srcwin->_bkgd, atDst = Dstwin->_attrs,
65 			*spSrc, *spDst, *epSrc, *epDst, *savepS,
66 			*savepD, width_bytes, numcopied;
67 
68 #ifdef	DEBUG
69 	if (outf)
70 		fprintf(outf, "copywin(%0.2o, %0.2o);\n", Srcwin, Dstwin);
71 #endif	/* DEBUG */
72 
73 	/*
74 	 * If we are going to be copying from curscr,
75 	 * first offset into curscr the offset the Dstwin knows about.
76 	 */
77 	if (Srcwin == curscr)
78 		minRowSrc += Dstwin->_yoffset;
79 
80 	/*
81 	 * There are three types of copy.
82 	 * 0 - Straight memcpy allowed
83 	 * 1 - We have to first check to see if the source character is a blank
84 	 * 2 - Dstwin has attributes or bkgd that must changed
85 	 * on a char-by-char basis.
86 	 */
87 	if ((which_copy = (over_lay) ? 1 :
88 	    (2 * ((Dstwin->_attrs != A_NORMAL) ||
89 	    (Dstwin->_bkgd != _BLNKCHAR)))) == 0)
90 		width_bytes = width * (int)sizeof (chtype);
91 
92 	/* for each Row */
93 	for (ySrc = minRowSrc, yDst = minRowDst; height-- > 0; ySrc++, yDst++) {
94 		if (which_copy) {
95 			spSrc = &_ySrc[ySrc][minColSrc];
96 			spDst = &_yDst[yDst][minColDst];
97 			numcopied = width;
98 
99 			epSrc = savepS = &_ySrc[ySrc][maxColDst];
100 			epDst = savepD = &_yDst[yDst][maxColDst];
101 		/* only copy into an area bounded by whole characters */
102 			for (; spDst <= epDst; spSrc++, spDst++)
103 				if (!ISCBIT(*spDst))
104 					break;
105 			if (spDst > epDst)
106 				continue;
107 			for (; epDst >= spDst; --epDst, --epSrc)
108 				if (!ISCBIT(*epDst))
109 					break;
110 			t = _curs_scrwidth[TYPE(RBYTE(*epDst))] - 1;
111 			if (epDst+t <= savepD)
112 				epDst += t, epSrc += t;
113 			else
114 				epDst -= 1, epSrc -= 1;
115 			if (epDst < spDst)
116 				continue;
117 			/* don't copy partial characters */
118 			for (; spSrc <= epSrc; ++spSrc, ++spDst)
119 				if (!ISCBIT(*spSrc))
120 					break;
121 			if (spSrc > epSrc)
122 				continue;
123 			for (; epSrc >= spSrc; --epSrc, --epDst)
124 				if (!ISCBIT(*epSrc))
125 					break;
126 			t = _curs_scrwidth[TYPE(RBYTE(*epSrc))] - 1;
127 			if (epSrc+t <= savepS)
128 				epSrc += t, epDst += t;
129 			else
130 				epSrc -= 1, epDst -= 1;
131 			if (epSrc < spSrc)
132 				continue;
133 		/* make sure that the copied-to place is clean */
134 			if (ISCBIT(*spDst))
135 				(void) _mbclrch(Dstwin, minRowDst,
136 				    /*LINTED*/
137 				    (intptr_t)(spDst - *_yDst[yDst]));
138 			if (ISCBIT(*epDst))
139 				(void) _mbclrch(Dstwin, minRowDst,
140 				    /*LINTED*/
141 				    (intptr_t)(epDst - *_yDst[yDst]));
142 			/*LINTED*/
143 			numcopied = (chtype) (epDst - spDst + 1);
144 
145 			if (which_copy == 1) {		/* overlay */
146 				for (; numcopied-- > 0; spSrc++, spDst++)
147 			/* Check to see if the char is a "blank/bkgd". */
148 					if (*spSrc != bkSrc)
149 						*spDst = *spSrc | atDst;
150 			} else {
151 				for (; numcopied-- > 0; spSrc++, spDst++)
152 					*spDst = *spSrc | atDst;
153 			}
154 		} else {
155 			/* ... copy all chtypes */
156 			(void) memcpy((char *)&_yDst[yDst][minColDst],
157 			    (char *)&_ySrc[ySrc][minColSrc], width_bytes);
158 		}
159 
160 		/* note that the line has changed */
161 		if (minColDst < Dstwin->_firstch[yDst])
162 			/*LINTED*/
163 			Dstwin->_firstch[yDst] = (short)minColDst;
164 		if (maxColDst > Dstwin->_lastch[yDst])
165 			/*LINTED*/
166 			Dstwin->_lastch[yDst] = (short)maxColDst;
167 	}
168 
169 #ifdef	_VR3_COMPAT_CODE
170 	if (_y16update) {
171 		(*_y16update)(Dstwin, (maxRowDst - minRowDst) + 1,
172 		    (maxColDst - minColDst) + 1, minRowDst, minColDst);
173 	}
174 #endif	/* _VR3_COMPAT_CODE */
175 
176 	/* note that something in Dstwin has changed */
177 	Dstwin->_flags |= _WINCHANGED;
178 
179 	if (Dstwin->_sync)
180 		wsyncup(Dstwin);
181 
182 	return (Dstwin->_immed ? wrefresh(Dstwin) : OK);
183 }
184