1 /* 2 * Copyright (c) 1981, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /* from: static char sccsid[] = "@(#)overlay.c 8.1 (Berkeley) 6/4/93"; */ 36 static char *rcsid = "$Id: overlay.c,v 1.6 1993/11/09 04:08:25 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <ctype.h> 40 #include <curses.h> 41 42 /* 43 * overlay -- 44 * Writes win1 on win2 non-destructively. 45 */ 46 int 47 overlay(win1, win2) 48 register WINDOW *win1, *win2; 49 { 50 51 register int x, y, y1, y2, endy, endx, starty, startx; 52 register __LDATA *sp, *end; 53 54 #ifdef DEBUG 55 __CTRACE("overlay: (%0.2o, %0.2o);\n", win1, win2); 56 #endif 57 starty = max(win1->begy, win2->begy); 58 startx = max(win1->begx, win2->begx); 59 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx); 60 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); 61 #ifdef DEBUG 62 __CTRACE("overlay: from (%d,%d) to (%d,%d)\n", 63 starty, startx, endy, endx); 64 #endif 65 if (starty >= endy || startx >= endx) 66 return (OK); 67 y1 = starty - win1->begy; 68 y2 = starty - win2->begy; 69 for (y = starty; y < endy; y++, y1++, y2++) { 70 end = &win1->lines[y1]->line[endx - win1->begx]; 71 x = startx - win2->begx; 72 for (sp = &win1->lines[y1]->line[startx - win1->begx]; 73 sp < end; sp++) { 74 if (!isspace(sp->ch)) { 75 wmove(win2, y2, x); 76 __waddch(win2, sp); 77 } 78 x++; 79 } 80 } 81 return (OK); 82 } 83