1 /* $NetBSD: copywin.c,v 1.20 2021/09/06 07:03:49 rin 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 1.20 2021/09/06 07:03:49 rin 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 /* overwrite() and overlay() can come here with -ve srcwin coords */ 68 if (sminrow < 0) { 69 dminrow -= sminrow; 70 sminrow = 0; 71 } 72 if (smincol < 0) { 73 dmincol -= smincol; 74 smincol = 0; 75 } 76 77 /* for symmetry allow dstwin coords to be -ve as well */ 78 if (dminrow < 0) { 79 sminrow -= dminrow; 80 dminrow = 0; 81 } 82 if (dmincol < 0) { 83 smincol -= dmincol; 84 dmincol = 0; 85 } 86 87 /* Bound dmaxcol for both windows (should be ok for dstwin) */ 88 if (dmaxcol >= dstwin->maxx) 89 dmaxcol = dstwin->maxx - 1; 90 if (smincol + (dmaxcol - dmincol) >= srcwin->maxx) 91 dmaxcol = srcwin->maxx + dmincol - smincol - 1; 92 if (dmaxcol < dmincol) 93 /* nothing in the intersection */ 94 return OK; 95 96 /* Bound dmaxrow for both windows (should be ok for dstwin) */ 97 if (dmaxrow >= dstwin->maxy) 98 dmaxrow = dstwin->maxy - 1; 99 if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy) 100 dmaxrow = srcwin->maxy + dminrow - sminrow - 1; 101 102 __CTRACE(__CTRACE_WINDOW, 103 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n", 104 dooverlay ? "overlay" : "overwrite", 105 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol); 106 107 for (; dminrow <= dmaxrow; sminrow++, dminrow++) { 108 sp = &srcwin->alines[sminrow]->line[smincol]; 109 end = sp + dmaxcol - dmincol; 110 __CTRACE(__CTRACE_WINDOW, "copywin: row %d\n", sminrow); 111 for (dcol = dmincol; sp <= end; dcol++, sp++) { 112 /* XXX: Perhaps this should check for the 113 * background character 114 */ 115 if ((dooverlay && !isspace(sp->ch)) || !dooverlay) { 116 wmove(dstwin, dminrow, dcol); 117 __CTRACE(__CTRACE_WINDOW, "copywin: dcol = %d\n", dcol); 118 #ifndef HAVE_WCHAR 119 __waddch(dstwin, sp); 120 #else 121 cc.vals[0] = sp->ch; 122 cc.attributes = sp->attr; 123 cc.elements = 1; 124 np = sp->nsp; 125 if (np) { 126 while (np && cc.elements <= 127 CURSES_CCHAR_MAX) { 128 cc.vals[cc.elements++] = np->ch; 129 np = np->next; 130 } 131 } 132 wadd_wch(dstwin, &cc); 133 #endif /* HAVE_WCHAR */ 134 } 135 } 136 } 137 __touchwin(dstwin); 138 return OK; 139 } 140