1 /* 2 * Copyright 2001 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 7 /* All Rights Reserved */ 8 9 /* 10 * Copyright (c) 1980 Regents of the University of California. 11 * All rights reserved. The Berkeley software License Agreement 12 * specifies the terms and conditions for redistribution. 13 */ 14 15 #pragma ident "%Z%%M% %I% %E% SMI" 16 17 /*LINTLIBRARY*/ 18 19 #ifndef lint 20 static char 21 sccsid[] = "@(#)overlay.c 1.9 89/07/13 SMI"; /* from UCB 5.2 86/02/12 */ 22 #endif /* not lint */ 23 24 #include "curses.ext" 25 #include <ctype.h> 26 27 #define min(a, b) ((a) < (b) ? (a) : (b)) 28 #define max(a, b) ((a) > (b) ? (a) : (b)) 29 30 /* 31 * This routine writes win1 on win2 non-destructively. 32 */ 33 34 int 35 overlay(WINDOW *win1, WINDOW *win2) 36 { 37 char *sp, *end; 38 int x, y, endy, endx, starty, startx; 39 int y1, y2; 40 41 #ifdef DEBUG 42 fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); 43 #endif 44 starty = max(win1->_begy, win2->_begy); 45 startx = max(win1->_begx, win2->_begx); 46 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy); 47 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); 48 #ifdef DEBUG 49 fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", 50 starty, startx, endy, endx); 51 #endif 52 if (starty >= endy || startx >= endx) 53 return (OK); 54 y1 = starty - win1->_begy; 55 y2 = starty - win2->_begy; 56 for (y = starty; y < endy; y++, y1++, y2++) { 57 end = &win1->_y[y1][endx - win1->_begx]; 58 x = startx - win2->_begx; 59 for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { 60 if (!isspace(*sp)) 61 (void) mvwaddch(win2, y2, x, *sp); 62 x++; 63 } 64 } 65 return (OK); 66 } 67