/* * Copyright (c) 1981, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)overlay.c 8.2 (Berkeley) 5/4/94"; #endif /* not lint */ #include <ctype.h> #include "curses.h" /* * overlay -- * Writes win1 on win2 non-destructively. */ int overlay(win1, win2) register WINDOW *win1, *win2; { register int x, y, y1, y2, endy, endx, starty, startx; register __LDATA *sp, *end; #ifdef DEBUG __CTRACE("overlay: (%0.2o, %0.2o);\n", win1, win2); #endif starty = max(win1->begy, win2->begy); startx = max(win1->begx, win2->begx); endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx); endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); #ifdef DEBUG __CTRACE("overlay: from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); #endif if (starty >= endy || startx >= endx) return (OK); y1 = starty - win1->begy; y2 = starty - win2->begy; for (y = starty; y < endy; y++, y1++, y2++) { end = &win1->lines[y1]->line[endx - win1->begx]; x = startx - win2->begx; for (sp = &win1->lines[y1]->line[startx - win1->begx]; sp < end; sp++) { if (!isspace(sp->ch)) { wmove(win2, y2, x); __waddch(win2, sp); } x++; } } return (OK); }