lib/libcurses/mvwin.c

   1 /*      $NetBSD: mvwin.c,v 1.19 2014/02/20 09:42:42 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[] = "@(#)mvwin.c     8.2 (Berkeley) 5/4/94";
  36 #else
  37 __RCSID("$NetBSD: mvwin.c,v 1.19 2014/02/20 09:42:42 blymn 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.  This does not change the physical screen
  47  * coordinates of the subwin, rather maps the characters in the subwin
  48  * sized part of the parent window starting at dy, dx into the subwin.
  49  *
  50  */
  51 int
  52 mvderwin(WINDOW *win, int dy, int dx)
  53 {
  54         WINDOW *parent;
  55         int x, i;
  56         __LINE *plp;
  57
  58         if (win == NULL)
  59                 return ERR;
  60
  61         parent = win->orig;
  62
  63         if (parent == NULL)
  64                 return ERR;
  65
  66         if (((win->maxx + dx) > parent->maxx) ||
  67             ((win->maxy + dy) > parent->maxy))
  68                 return ERR;
  69
  70         win->flags |= __ISDERWIN;
  71         win->derx = dx;
  72         win->dery = dy;
  73
  74         x = parent->begx + dx;
  75
  76         /*
  77          * Mark the source area for the derwin as changed so it will be
  78          * copied to the destination window on refresh.
  79          */
  80         for (i = 0; i < win->maxy; i++) {
  81                 plp = parent->alines[i + dy];
  82                 plp->flags = __ISDIRTY;
  83                 if (*plp->firstchp > x)
  84                         *plp->firstchp = x;
  85                 if (*plp->lastchp < x + win->maxx)
  86                         *plp->lastchp = x + win->maxx;
  87 #ifdef DEBUG
  88                 __CTRACE(__CTRACE_REFRESH, "mvderwin: firstchp = %d, lastchp = %d\n", *plp->firstchp, *plp->lastchp);
  89 #endif
  90         }
  91
  92         return OK;
  93 }
  94
  95 /*
  96  * mvwin --
  97  *      Relocate the starting position of a window.
  98  */
  99 int
 100 mvwin(WINDOW *win, int by, int bx)
 101 {
 102         WINDOW *orig;
 103         int     dy, dx;
 104
 105         if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
 106                 return (ERR);
 107         dy = by - win->begy;
 108         dx = bx - win->begx;
 109         orig = win->orig;
 110         if (orig == NULL) {
 111                 orig = win;
 112                 do {
 113                         win->begy += dy;
 114                         win->begx += dx;
 115                         __swflags(win);
 116                         win = win->nextp;
 117                 } while (win != orig);
 118         } else {
 119                 if (by < orig->begy || win->maxy + dy > orig->maxy)
 120                         return (ERR);
 121                 if (bx < orig->begx || win->maxx + dx > orig->maxx)
 122                         return (ERR);
 123                 win->begy = by;
 124                 win->begx = bx;
 125                 __swflags(win);
 126                 __set_subwin(orig, win);
 127         }
 128         __touchwin(win);
 129         return (OK);
 130 }