17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate * Copyright (c) 1995, by Sun Microsystems, Inc.
247c478bd9Sstevel@tonic-gate * All rights reserved.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate /*
287c478bd9Sstevel@tonic-gate * wscrl.c
297c478bd9Sstevel@tonic-gate *
307c478bd9Sstevel@tonic-gate * XCurses Library
317c478bd9Sstevel@tonic-gate *
327c478bd9Sstevel@tonic-gate * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
337c478bd9Sstevel@tonic-gate *
347c478bd9Sstevel@tonic-gate */
357c478bd9Sstevel@tonic-gate
367c478bd9Sstevel@tonic-gate #ifdef M_RCSID
377c478bd9Sstevel@tonic-gate #ifndef lint
387c478bd9Sstevel@tonic-gate static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wscrl.c 1.4 1995/07/26 17:43:20 ant Exp $";
397c478bd9Sstevel@tonic-gate #endif
407c478bd9Sstevel@tonic-gate #endif
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate #include <private.h>
437c478bd9Sstevel@tonic-gate #include <string.h>
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate /*f
467c478bd9Sstevel@tonic-gate * For positive n scroll the window up n lines (line i+n becomes i);
477c478bd9Sstevel@tonic-gate * otherwise scroll the window down n lines.
487c478bd9Sstevel@tonic-gate */
497c478bd9Sstevel@tonic-gate int
wscrl(w,n)507c478bd9Sstevel@tonic-gate wscrl(w, n)
517c478bd9Sstevel@tonic-gate WINDOW *w;
527c478bd9Sstevel@tonic-gate int n;
537c478bd9Sstevel@tonic-gate {
54*1da57d55SToomas Soome int y, x, width, start, finish, to;
557c478bd9Sstevel@tonic-gate
567c478bd9Sstevel@tonic-gate #ifdef M_CURSES_TRACE
577c478bd9Sstevel@tonic-gate __m_trace("wscrl(%p, %d)", w, n);
587c478bd9Sstevel@tonic-gate #endif
597c478bd9Sstevel@tonic-gate
607c478bd9Sstevel@tonic-gate if (n == 0)
617c478bd9Sstevel@tonic-gate return __m_return_code("wscrl", OK);
627c478bd9Sstevel@tonic-gate
63*1da57d55SToomas Soome /* Shuffle pointers in order to scroll. The region
647c478bd9Sstevel@tonic-gate * from start to finish inclusive will be moved to
657c478bd9Sstevel@tonic-gate * either the top or bottom of _line[].
667c478bd9Sstevel@tonic-gate */
677c478bd9Sstevel@tonic-gate if (0 < n) {
687c478bd9Sstevel@tonic-gate start = w->_top;
697c478bd9Sstevel@tonic-gate finish = w->_top + n - 1;
707c478bd9Sstevel@tonic-gate to = w->_bottom;
717c478bd9Sstevel@tonic-gate } else {
727c478bd9Sstevel@tonic-gate start = w->_bottom + n;
737c478bd9Sstevel@tonic-gate finish = w->_bottom - 1;
747c478bd9Sstevel@tonic-gate to = w->_top;
757c478bd9Sstevel@tonic-gate }
767c478bd9Sstevel@tonic-gate
777c478bd9Sstevel@tonic-gate /* Blank out new lines. */
787c478bd9Sstevel@tonic-gate if (__m_cc_erase(w, start, 0, finish, w->_maxx-1) == -1)
797c478bd9Sstevel@tonic-gate return __m_return_code("wscrl", ERR);
807c478bd9Sstevel@tonic-gate
817c478bd9Sstevel@tonic-gate /* Scroll lines by shuffling pointers. */
827c478bd9Sstevel@tonic-gate (void) __m_ptr_move((void **) w->_line, w->_maxy, start, finish, to);
837c478bd9Sstevel@tonic-gate
847c478bd9Sstevel@tonic-gate if ((w->_flags & W_FULL_WINDOW)
857c478bd9Sstevel@tonic-gate && w->_top == 0 && w->_bottom == w->_maxy)
867c478bd9Sstevel@tonic-gate w->_scroll += n;
877c478bd9Sstevel@tonic-gate else
887c478bd9Sstevel@tonic-gate w->_scroll = 0;
897c478bd9Sstevel@tonic-gate
907c478bd9Sstevel@tonic-gate (void) wtouchln(w, 0, w->_maxy, 1);
917c478bd9Sstevel@tonic-gate
927c478bd9Sstevel@tonic-gate WSYNC(w);
937c478bd9Sstevel@tonic-gate
947c478bd9Sstevel@tonic-gate return __m_return_code("wscrl", WFLUSH(w));
957c478bd9Sstevel@tonic-gate }
96