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 /*LINTLIBRARY*/ 16 17 #ifndef lint 18 static char 19 sccsid[] = "@(#)overlay.c 1.9 89/07/13 SMI"; /* from UCB 5.2 86/02/12 */ 20 #endif /* not lint */ 21 22 #include "curses.ext" 23 #include <ctype.h> 24 25 #define min(a, b) ((a) < (b) ? (a) : (b)) 26 #define max(a, b) ((a) > (b) ? (a) : (b)) 27 28 /* 29 * This routine writes win1 on win2 non-destructively. 30 */ 31 32 int 33 overlay(WINDOW *win1, WINDOW *win2) 34 { 35 char *sp, *end; 36 int x, y, endy, endx, starty, startx; 37 int y1, y2; 38 39 #ifdef DEBUG 40 fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); 41 #endif 42 starty = max(win1->_begy, win2->_begy); 43 startx = max(win1->_begx, win2->_begx); 44 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy); 45 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); 46 #ifdef DEBUG 47 fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", 48 starty, startx, endy, endx); 49 #endif 50 if (starty >= endy || startx >= endx) 51 return (OK); 52 y1 = starty - win1->_begy; 53 y2 = starty - win2->_begy; 54 for (y = starty; y < endy; y++, y1++, y2++) { 55 end = &win1->_y[y1][endx - win1->_begx]; 56 x = startx - win2->_begx; 57 for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { 58 if (!isspace(*sp)) 59 (void) mvwaddch(win2, y2, x, *sp); 60 x++; 61 } 62 } 63 return (OK); 64 } 65