/* * Copyright (c) 1981 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 5.6 (Berkeley) 6/1/90"; #endif /* not lint */ # include "curses.ext" # include # define min(a,b) (a < b ? a : b) # define max(a,b) (a > b ? a : b) /* * This routine writes win1 on win2 non-destructively. * */ overlay(win1, win2) register WINDOW *win1, *win2; { register char *sp, *end; register int x, y, endy, endx, starty, startx; register int y1,y2; # ifdef DEBUG fprintf(outf, "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 fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); # endif if (starty >= endy || startx >= endx) return; y1 = starty - win1->_begy; y2 = starty - win2->_begy; for (y = starty; y < endy; y++, y1++, y2++) { end = &win1->_y[y1][endx - win1->_begx]; x = startx - win2->_begx; for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { if (!isspace(*sp)) mvwaddch(win2, y2, x, *sp); x++; } } }