1 /* $NetBSD: mvwin.c,v 1.17 2012/09/28 06:03:45 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 1.17 2012/09/28 06:03:45 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, y, i; 56 __LINE *lp, *olp; 57 #ifdef HAVE_WCHAR 58 __LDATA *cp; 59 int j; 60 nschar_t *np; 61 #endif /* HAVE_WCHAR */ 62 63 if (win == NULL) 64 return ERR; 65 66 parent = win->orig; 67 68 if (parent == NULL) 69 return ERR; 70 71 if (((win->maxx + dx) > parent->maxx) || 72 ((win->maxy + dy) > parent->maxy)) 73 return ERR; 74 75 x = parent->begx + dx; 76 y = parent->begy + dy; 77 78 win->ch_off = x; 79 /* Point the line pointers to line space */ 80 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 81 lp->flags = __ISDIRTY; 82 win->alines[i] = lp; 83 olp = parent->alines[i + dy]; 84 #ifdef DEBUG 85 lp->sentinel = SENTINEL_VALUE; 86 #endif 87 lp->line = &olp->line[win->ch_off]; 88 lp->firstchp = &olp->firstch; 89 lp->lastchp = &olp->lastch; 90 #ifndef HAVE_WCHAR 91 lp->hash = __hash((char *)(void *)lp->line, 92 (size_t) (win->maxx * __LDATASIZE)); 93 #else 94 for (cp = lp->line, j = 0; j < win->maxx; j++, cp++) { 95 lp->hash = __hash_more(&cp->ch, sizeof(wchar_t), 96 lp->hash); 97 lp->hash = __hash_more(&cp->attr, sizeof(wchar_t), 98 lp->hash); 99 if (cp->nsp) { 100 np = cp->nsp; 101 while (np) { 102 lp->hash = __hash_more(&np->ch, 103 sizeof(wchar_t), lp->hash); 104 np = np->next; 105 } 106 } 107 } 108 #endif /* HAVE_WCHAR */ 109 } 110 111 return OK; 112 } 113 114 /* 115 * mvwin -- 116 * Relocate the starting position of a window. 117 */ 118 int 119 mvwin(WINDOW *win, int by, int bx) 120 { 121 WINDOW *orig; 122 int dy, dx; 123 124 if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS) 125 return (ERR); 126 dy = by - win->begy; 127 dx = bx - win->begx; 128 orig = win->orig; 129 if (orig == NULL) { 130 orig = win; 131 do { 132 win->begy += dy; 133 win->begx += dx; 134 __swflags(win); 135 win = win->nextp; 136 } while (win != orig); 137 } else { 138 if (by < orig->begy || win->maxy + dy > orig->maxy) 139 return (ERR); 140 if (bx < orig->begx || win->maxx + dx > orig->maxx) 141 return (ERR); 142 win->begy = by; 143 win->begx = bx; 144 __swflags(win); 145 __set_subwin(orig, win); 146 } 147 __touchwin(win); 148 return (OK); 149 } 150