lib/libcurses/mvwin.c

   1 /*      $NetBSD: mvwin.c,v 1.14 2003/04/08 05:56:01 jdc 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[] = "@(#)mvwin.c     8.2 (Berkeley) 5/4/94";
  36 #else
  37 __RCSID("$NetBSD: mvwin.c,v 1.14 2003/04/08 05:56:01 jdc Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #include "curses.h"
  42 #include "curses_private.h"
  43
  44 /*
  45  * mvderwin --
  46  *      Move a derived window.
  47  *
  48  */
  49 int
  50 mvderwin(WINDOW *win, int dy, int dx)
  51 {
  52         WINDOW *parent;
  53         int x, y;
  54
  55         if (win == NULL)
  56                 return ERR;
  57
  58         parent = win->orig;
  59
  60         if (parent == NULL)
  61                 return ERR;
  62
  63         x = parent->begx + dx;
  64         y = parent->begy + dy;
  65         return mvwin(win, y, x);
  66 }
  67
  68 /*
  69  * mvwin --
  70  *      Relocate the starting position of a window.
  71  */
  72 int
  73 mvwin(WINDOW *win, int by, int bx)
  74 {
  75         WINDOW *orig;
  76         int     dy, dx;
  77
  78         if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
  79                 return (ERR);
  80         dy = by - win->begy;
  81         dx = bx - win->begx;
  82         orig = win->orig;
  83         if (orig == NULL) {
  84                 orig = win;
  85                 do {
  86                         win->begy += dy;
  87                         win->begx += dx;
  88                         __swflags(win);
  89                         win = win->nextp;
  90                 } while (win != orig);
  91         } else {
  92                 if (by < orig->begy || win->maxy + dy > orig->maxy)
  93                         return (ERR);
  94                 if (bx < orig->begx || win->maxx + dx > orig->maxx)
  95                         return (ERR);
  96                 win->begy = by;
  97                 win->begx = bx;
  98                 __swflags(win);
  99                 __set_subwin(orig, win);
 100         }
 101         __touchwin(win);
 102         return (OK);
 103 }