1 /* $NetBSD: toucholap.c,v 1.19 2024/12/23 02:58:04 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)toucholap.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: toucholap.c,v 1.19 2024/12/23 02:58:04 blymn Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "curses.h" 42 #include "curses_private.h" 43 44 /* 45 * touchoverlap -- 46 * Touch, on win2, the part that overlaps with win1. 47 */ 48 int 49 touchoverlap(WINDOW *win1, WINDOW *win2) 50 { 51 int y, endy, endx, starty, startx; 52 53 __CTRACE(__CTRACE_WINDOW, "touchoverlap: (%p, %p);\n", win1, win2); 54 55 if (__predict_false(win1 == NULL) || __predict_false(win2 == NULL)) 56 return ERR; 57 58 starty = max(win1->begy, win2->begy); 59 startx = max(win1->begx, win2->begx); 60 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begy); 61 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); 62 __CTRACE(__CTRACE_WINDOW, "touchoverlap: from (%d,%d) to (%d,%d)\n", 63 starty, startx, endy, endx); 64 __CTRACE(__CTRACE_WINDOW, "touchoverlap: win1 (%d,%d) to (%d,%d)\n", 65 win1->begy, win1->begx, win1->begy + win1->maxy, 66 win1->begx + win1->maxx); 67 __CTRACE(__CTRACE_WINDOW, "touchoverlap: win2 (%d,%d) to (%d,%d)\n", 68 win2->begy, win2->begx, win2->begy + win2->maxy, 69 win2->begx + win2->maxx); 70 if (starty >= endy || startx >= endx) 71 return OK; 72 starty -= win2->begy; 73 startx -= win2->begx; 74 endy -= win2->begy; 75 endx -= win2->begx; 76 for (--endx, y = starty; y < endy; y++) 77 __touchline(win2, y, startx, endx); 78 return OK; 79 } 80