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mvwin.c revision 1.16.2.1 
      1 /*	$NetBSD: mvwin.c,v 1.16.2.1 2012/10/30 18:59:08 yamt 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 1.16.2.1 2012/10/30 18:59:08 yamt 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, y, i;
     56 	__LINE *lp, *olp;
     57 #ifdef HAVE_WCHAR
     58 	__LDATA *cp;
     59 	int j;
     60 	nschar_t *np;
     61 #endif /* HAVE_WCHAR */
     62 
     63 	if (win == NULL)
     64 		return ERR;
     65 
     66 	parent = win->orig;
     67 
     68 	if (parent == NULL)
     69 		return ERR;
     70 
     71 	if (((win->maxx + dx) > parent->maxx) ||
     72 	    ((win->maxy + dy) > parent->maxy))
     73 		return ERR;
     74 
     75 	x = parent->begx + dx;
     76 	y = parent->begy + dy;
     77 
     78 	win->ch_off = x;
     79 	/* Point the line pointers to line space */
     80 	for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
     81 		lp->flags = __ISDIRTY;
     82 		win->alines[i] = lp;
     83 		olp = parent->alines[i + dy];
     84 #ifdef DEBUG
     85 		lp->sentinel = SENTINEL_VALUE;
     86 #endif
     87 		lp->line = &olp->line[win->ch_off];
     88 		lp->firstchp = &olp->firstch;
     89 		lp->lastchp = &olp->lastch;
     90 #ifndef HAVE_WCHAR
     91 		lp->hash = __hash((char *)(void *)lp->line,
     92 		    (size_t) (win->maxx * __LDATASIZE));
     93 #else
     94 		for (cp = lp->line, j = 0; j < win->maxx; j++, cp++) {
     95 			lp->hash = __hash_more(&cp->ch, sizeof(wchar_t),
     96 			    lp->hash);
     97 			lp->hash = __hash_more(&cp->attr, sizeof(wchar_t),
     98 			    lp->hash);
     99 			if (cp->nsp) {
    100 				np = cp->nsp;
    101 				while (np) {
    102 					lp->hash = __hash_more(&np->ch,
    103 					    sizeof(wchar_t), lp->hash);
    104 					np = np->next;
    105 				}
    106 			}
    107 		}
    108 #endif /* HAVE_WCHAR */
    109 	}
    110 
    111 	return OK;
    112 }
    113 
    114 /*
    115  * mvwin --
    116  *	Relocate the starting position of a window.
    117  */
    118 int
    119 mvwin(WINDOW *win, int by, int bx)
    120 {
    121 	WINDOW *orig;
    122 	int     dy, dx;
    123 
    124 	if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
    125 		return (ERR);
    126 	dy = by - win->begy;
    127 	dx = bx - win->begx;
    128 	orig = win->orig;
    129 	if (orig == NULL) {
    130 		orig = win;
    131 		do {
    132 			win->begy += dy;
    133 			win->begx += dx;
    134 			__swflags(win);
    135 			win = win->nextp;
    136 		} while (win != orig);
    137 	} else {
    138 		if (by < orig->begy || win->maxy + dy > orig->maxy)
    139 			return (ERR);
    140 		if (bx < orig->begx || win->maxx + dx > orig->maxx)
    141 			return (ERR);
    142 		win->begy = by;
    143 		win->begx = bx;
    144 		__swflags(win);
    145 		__set_subwin(orig, win);
    146 	}
    147 	__touchwin(win);
    148 	return (OK);
    149 }
    150