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 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 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