1 /* $NetBSD: copywin.c,v 1.17 2017/01/06 13:53:18 roy 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 1.17 2017/01/06 13:53:18 roy 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 #ifdef DEBUG 63 __CTRACE(__CTRACE_WINDOW, 64 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n", 65 dooverlay ? "overlay" : "overwrite", 66 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol); 67 #endif 68 69 /* overwrite() and overlay() can come here with -ve srcwin coords */ 70 if (sminrow < 0) { 71 dminrow -= sminrow; 72 sminrow = 0; 73 } 74 if (smincol < 0) { 75 dmincol -= smincol; 76 smincol = 0; 77 } 78 79 /* for symmetry allow dstwin coords to be -ve as well */ 80 if (dminrow < 0) { 81 sminrow -= dminrow; 82 dminrow = 0; 83 } 84 if (dmincol < 0) { 85 smincol -= dmincol; 86 dmincol = 0; 87 } 88 89 /* Bound dmaxcol for both windows (should be ok for dstwin) */ 90 if (dmaxcol >= dstwin->maxx) 91 dmaxcol = dstwin->maxx - 1; 92 if (smincol + (dmaxcol - dmincol) >= srcwin->maxx) 93 dmaxcol = srcwin->maxx + dmincol - smincol - 1; 94 if (dmaxcol < dmincol) 95 /* nothing in the intersection */ 96 return OK; 97 98 /* Bound dmaxrow for both windows (should be ok for dstwin) */ 99 if (dmaxrow >= dstwin->maxy) 100 dmaxrow = dstwin->maxy - 1; 101 if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy) 102 dmaxrow = srcwin->maxy + dminrow - sminrow - 1; 103 104 #ifdef DEBUG 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 #endif 110 111 for (; dminrow <= dmaxrow; sminrow++, dminrow++) { 112 sp = &srcwin->alines[sminrow]->line[smincol]; 113 end = sp + dmaxcol - dmincol; 114 #ifdef DEBUG 115 __CTRACE(__CTRACE_WINDOW, "copywin: row %d\n", sminrow); 116 #endif 117 for (dcol = dmincol; sp <= end; dcol++, sp++) { 118 /* XXX: Perhaps this should check for the 119 * background character 120 */ 121 if ((dooverlay && !isspace(sp->ch)) || !dooverlay) { 122 wmove(dstwin, dminrow, dcol); 123 #ifdef DEBUG 124 __CTRACE(__CTRACE_WINDOW, "copywin: dcol = %d\n", dcol); 125 #endif 126 #ifndef HAVE_WCHAR 127 __waddch(dstwin, sp); 128 #else 129 cc.vals[0] = sp->ch; 130 cc.attributes = sp->attr; 131 cc.elements = 1; 132 np = sp->nsp; 133 if (np) { 134 while (np && cc.elements <= 135 CURSES_CCHAR_MAX) { 136 cc.vals[cc.elements++] = np->ch; 137 np = np->next; 138 } 139 } 140 wadd_wch(dstwin, &cc); 141 #endif /* HAVE_WCHAR */ 142 } 143 } 144 } 145 __touchwin(dstwin); 146 return OK; 147 } 148