1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 /*LINTLIBRARY*/ 41 42 #include <sys/types.h> 43 #include "curses_inc.h" 44 45 /* Scroll the given window up/down n lines. */ 46 int 47 wscrl(WINDOW *win, int n) 48 { 49 short curx, cury; 50 bool savimmed, savsync; 51 52 #ifdef DEBUG 53 if (outf) 54 if (win == stdscr) 55 fprintf(outf, "scroll(stdscr, %d)\n", n); 56 else 57 if (win == curscr) 58 fprintf(outf, "scroll(curscr, %d)\n", n); 59 else 60 fprintf(outf, "scroll(%x, %d)\n", win, n); 61 #endif /* DEBUG */ 62 if (!win->_scroll || (win->_flags & _ISPAD)) 63 return (ERR); 64 65 savimmed = win->_immed; 66 savsync = win->_sync; 67 win->_immed = win->_sync = FALSE; 68 69 curx = win->_curx; cury = win->_cury; 70 71 if (cury >= win->_tmarg && cury <= win->_bmarg) 72 win->_cury = win->_tmarg; 73 else 74 win->_cury = 0; 75 76 (void) winsdelln(win, -n); 77 win->_curx = curx; 78 win->_cury = cury; 79 80 win->_sync = savsync; 81 82 if (win->_sync) 83 wsyncup(win); 84 85 return ((win->_immed = savimmed) ? wrefresh(win) : OK); 86 } 87