1 /* $NetBSD: copywin.c,v 1.22 2024/12/23 02:58:03 blymn Exp $ */ 2 3 /*- 4 * Copyright (c) 1998-1999 Brett Lymn 5 * (blymn@baea.com.au, brett_lymn@yahoo.com.au) 6 * All rights reserved. 7 * 8 * This code has been donated to The NetBSD Foundation by the Author. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: copywin.c,v 1.22 2024/12/23 02:58:03 blymn Exp $"); 35 #endif /* not lint */ 36 37 #include <ctype.h> 38 #include <string.h> 39 #include "curses.h" 40 #include "curses_private.h" 41 42 /* 43 * copywin -- 44 * Copy the box starting at (sminrow, smincol) with a size that 45 * matches the destination box (dminrow, dmincol) by (dmaxrow, dmaxcol) 46 * from the source window srcwin to the destination window dstwin. 47 * All these coordindinates are relative to the relevant window. 48 * If dooverlay is true then the copy is nondestructive otherwise the 49 * copy is destructive. 50 */ 51 int copywin(const WINDOW *srcwin, WINDOW *dstwin, 52 int sminrow, int smincol, 53 int dminrow, int dmincol, int dmaxrow, int dmaxcol, int dooverlay) 54 { 55 int dcol; 56 __LDATA *sp, *end; 57 #ifdef HAVE_WCHAR 58 cchar_t cc; 59 nschar_t *np; 60 #endif /* HAVE_WCHAR */ 61 62 __CTRACE(__CTRACE_WINDOW, 63 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n", 64 dooverlay ? "overlay" : "overwrite", 65 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol); 66 67 if ((srcwin == NULL) || (dstwin == NULL)) 68 return ERR; 69 70 /* overwrite() and overlay() can come here with -ve srcwin coords */ 71 if (sminrow < 0) { 72 dminrow -= sminrow; 73 sminrow = 0; 74 } 75 if (smincol < 0) { 76 dmincol -= smincol; 77 smincol = 0; 78 } 79 80 /* for symmetry allow dstwin coords to be -ve as well */ 81 if (dminrow < 0) { 82 sminrow -= dminrow; 83 dminrow = 0; 84 } 85 if (dmincol < 0) { 86 smincol -= dmincol; 87 dmincol = 0; 88 } 89 90 /* Bound dmaxcol for both windows (should be ok for dstwin) */ 91 if (dmaxcol >= dstwin->maxx) 92 dmaxcol = dstwin->maxx - 1; 93 if (smincol + (dmaxcol - dmincol) >= srcwin->maxx) 94 dmaxcol = srcwin->maxx + dmincol - smincol - 1; 95 if (dmaxcol < dmincol) 96 /* nothing in the intersection */ 97 return OK; 98 99 /* Bound dmaxrow for both windows (should be ok for dstwin) */ 100 if (dmaxrow >= dstwin->maxy) 101 dmaxrow = dstwin->maxy - 1; 102 if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy) 103 dmaxrow = srcwin->maxy + dminrow - sminrow - 1; 104 105 __CTRACE(__CTRACE_WINDOW, 106 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n", 107 dooverlay ? "overlay" : "overwrite", 108 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol); 109 110 for (; dminrow <= dmaxrow; sminrow++, dminrow++) { 111 sp = &srcwin->alines[sminrow]->line[smincol]; 112 end = sp + dmaxcol - dmincol; 113 __CTRACE(__CTRACE_WINDOW, "copywin: row %d\n", sminrow); 114 for (dcol = dmincol; sp <= end; dcol++, sp++) { 115 /* XXX: Perhaps this should check for the 116 * background character 117 */ 118 if ((dooverlay && !isspace(sp->ch)) || !dooverlay) { 119 wmove(dstwin, dminrow, dcol); 120 __CTRACE(__CTRACE_WINDOW, "copywin: dcol = %d\n", dcol); 121 #ifndef HAVE_WCHAR 122 __waddch(dstwin, sp); 123 #else 124 cc.vals[0] = sp->ch; 125 cc.attributes = sp->attr; 126 cc.elements = 1; 127 np = sp->nsp; 128 if (np) { 129 while (np && cc.elements <= 130 CURSES_CCHAR_MAX) { 131 cc.vals[cc.elements++] = np->ch; 132 np = np->next; 133 } 134 } 135 wadd_wch(dstwin, &cc); 136 #endif /* HAVE_WCHAR */ 137 } 138 } 139 } 140 __touchwin(dstwin, 0); 141 return OK; 142 } 143