1 /* $NetBSD: copywin.c,v 1.11 2004/08/02 18:47:52 dsl 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 1.11 2004/08/02 18:47:52 dsl 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 58 /* overwrite() and overlay() can come here with -ve srcwin coords */ 59 if (sminrow < 0) { 60 dminrow -= sminrow; 61 sminrow = 0; 62 } 63 if (smincol < 0) { 64 dmincol -= smincol; 65 smincol = 0; 66 } 67 68 /* for symmetry allow dstwin coords to be -ve as well */ 69 if (dminrow < 0) { 70 sminrow -= dminrow; 71 dminrow = 0; 72 } 73 if (dmincol < 0) { 74 smincol -= dmincol; 75 dmincol = 0; 76 } 77 78 /* Bound dmaxcol for both windows (should be ok for dstwin) */ 79 if (dmaxcol >= dstwin->maxx) 80 dmaxcol = dstwin->maxx - 1; 81 if (smincol + (dmaxcol - dmincol) >= srcwin->maxx) 82 dmaxcol = srcwin->maxx + dmincol - smincol - 1; 83 if (dmaxcol < dmincol) 84 /* nothing in the intersection */ 85 return OK; 86 87 /* Bound dmaxrow for both windows (should be ok for dstwin) */ 88 if (dmaxrow >= dstwin->maxy) 89 dmaxrow = dstwin->maxy - 1; 90 if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy) 91 dmaxrow = srcwin->maxy + dminrow - sminrow - 1; 92 93 #ifdef DEBUG 94 __CTRACE("copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n", 95 dooverlay ? "overlay" : "overwrite", 96 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol); 97 #endif 98 99 for (; dminrow <= dmaxrow; sminrow++, dminrow++) { 100 sp = &srcwin->lines[sminrow]->line[smincol]; 101 end = sp + dmaxcol - dmincol; 102 if (dooverlay) { 103 for (dcol = dmincol; sp <= end; dcol++, sp++) { 104 /* XXX: Perhaps this should check for the 105 * background character 106 */ 107 if (!isspace(sp->ch)) { 108 wmove(dstwin, dminrow, dcol); 109 __waddch(dstwin, sp); 110 } 111 } 112 } else { 113 wmove(dstwin, dminrow, dmincol); 114 for (; sp <= end; sp++) { 115 __waddch(dstwin, sp); 116 } 117 } 118 } 119 return OK; 120 } 121 122