1 /* $NetBSD: mvwin.c,v 1.25 2024/12/23 02:58:04 blymn 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[] = "@(#)mvwin.c 8.2 (Berkeley) 5/4/94";
36 #else
37 __RCSID("$NetBSD: mvwin.c,v 1.25 2024/12/23 02:58:04 blymn Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include "curses.h"
42 #include "curses_private.h"
43
44 /*
45 * mvderwin --
46 * Move a derived window. This does not change the physical screen
47 * coordinates of the subwin, rather maps the characters in the subwin
48 * sized part of the parent window starting at dy, dx into the subwin.
49 *
50 */
51 int
mvderwin(WINDOW * win,int dy,int dx)52 mvderwin(WINDOW *win, int dy, int dx)
53 {
54 WINDOW *parent;
55 int x, i;
56 __LINE *plp;
57
58 if (__predict_false(win == NULL))
59 return ERR;
60
61 parent = win->orig;
62
63 if (parent == NULL)
64 return ERR;
65
66 if (((win->maxx + dx) > parent->maxx) ||
67 ((win->maxy + dy) > parent->maxy))
68 return ERR;
69
70 win->flags |= __ISDERWIN;
71 win->derx = dx;
72 win->dery = dy;
73
74 x = parent->begx + dx;
75
76 /*
77 * Mark the source area for the derwin as changed so it will be
78 * copied to the destination window on refresh.
79 */
80 for (i = 0; i < win->maxy; i++) {
81 plp = parent->alines[i + dy];
82 plp->flags = __ISDIRTY;
83 if (*plp->firstchp > x)
84 *plp->firstchp = x;
85 if (*plp->lastchp < x + win->maxx)
86 *plp->lastchp = x + win->maxx;
87 __CTRACE(__CTRACE_REFRESH,
88 "mvderwin: firstchp = %d, lastchp = %d\n",
89 *plp->firstchp, *plp->lastchp);
90 }
91
92 return OK;
93 }
94
95 /*
96 * mvwin --
97 * Relocate the starting position of a window.
98 */
99 int
mvwin(WINDOW * win,int by,int bx)100 mvwin(WINDOW *win, int by, int bx)
101 {
102 WINDOW *orig;
103 int dy, dx;
104
105 if (__predict_false(win == NULL))
106 return ERR;
107
108 if (by < 0 || by + win->maxy > win->screen->LINES ||
109 bx < 0 || bx + win->maxx > win->screen->COLS)
110 return ERR;
111 dy = by - win->begy;
112 dx = bx - win->begx;
113 orig = win->orig;
114 if (orig == NULL) {
115 orig = win;
116 do {
117 win->begy += dy;
118 win->begx += dx;
119 __swflags(win);
120 win = win->nextp;
121 } while (win != orig);
122 } else {
123 if (by < orig->begy || win->maxy + dy > orig->maxy)
124 return ERR;
125 if (bx < orig->begx || win->maxx + dx > orig->maxx)
126 return ERR;
127 win->begy = by;
128 win->begx = bx;
129 __swflags(win);
130 __set_subwin(orig, win);
131 }
132 __touchwin(win, 0);
133 return OK;
134 }
135