1 /* 2 * Copyright (c) 1981, 1993, 1994 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 static char sccsid[] = "@(#)toucholap.c 8.2 (Berkeley) 5/4/94"; 36 #endif /* not lint */ 37 38 #include "curses.h" 39 40 /* 41 * touchoverlap -- 42 * Touch, on win2, the part that overlaps with win1. 43 */ 44 int 45 touchoverlap(win1, win2) 46 register WINDOW *win1, *win2; 47 { 48 register int y, endy, endx, starty, startx; 49 50 #ifdef DEBUG 51 __CTRACE("touchoverlap: (%0.2o, %0.2o);\n", win1, win2); 52 #endif 53 starty = max(win1->begy, win2->begy); 54 startx = max(win1->begx, win2->begx); 55 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx); 56 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); 57 #ifdef DEBUG 58 __CTRACE("touchoverlap: from (%d,%d) to (%d,%d)\n", 59 starty, startx, endy, endx); 60 __CTRACE("touchoverlap: win1 (%d,%d) to (%d,%d)\n", 61 win1->begy, win1->begx, win1->begy + win1->maxy, 62 win1->begx + win1->maxx); 63 __CTRACE("touchoverlap: win2 (%d,%d) to (%d,%d)\n", 64 win2->begy, win2->begx, win2->begy + win2->maxy, 65 win2->begx + win2->maxx); 66 #endif 67 if (starty >= endy || startx >= endx) 68 return (OK); 69 starty -= win2->begy; 70 startx -= win2->begx; 71 endy -= win2->begy; 72 endx -= win2->begx; 73 for (--endx, y = starty; y < endy; y++) 74 __touchline(win2, y, startx, endx, 0); 75 return (OK); 76 } 77 78