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 (c) 1995-1998 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* LINTLIBRARY */ 30 31 /* 32 * winsdel.c 33 * 34 * XCurses Library 35 * 36 * Copyright 1990, 1995 by Mortice Kern Systems. All rights reserved. 37 * 38 */ 39 40 #ifdef M_RCSID 41 #ifndef lint 42 static char rcsID[] = 43 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/" 44 "libxcurses/src/libc/xcurses/rcs/winsdel.c 1.3 1998/05/27 18:31:31 " 45 "cbates Exp $"; 46 #endif 47 #endif 48 49 #include <private.h> 50 #include <stdlib.h> 51 52 /* 53 * Insert/delete rows from a window. 54 * 55 * Positive N inserts rows and negative N deletes. The size of the 56 * window remains fixed so that rows insert/deleted will cause rows to 57 * disappear/appear at the end of the window. 58 * 59 * NOTE: This routine called in doupdate.c with curscr as window. 60 */ 61 int 62 winsdelln(WINDOW *w, int n) 63 { 64 int row; 65 66 /* Check bounds and limit if necessary. */ 67 if (w->_maxy < w->_cury + abs(n)) 68 n = (w->_maxy - w->_cury + 1) * (n < 0 ? -1 : 1); 69 70 /* Insert/delete accomplished by pointer shuffling. */ 71 if (n < 0) { 72 /* Delete n lines from current cursor line. */ 73 (void) __m_ptr_move((void **) w->_line, w->_maxy, 74 w->_cury, w->_cury - (n + 1), w->_maxy); 75 76 /* Blank lines come in at the bottom of the screen. */ 77 row = w->_maxy + n; 78 } else { 79 /* Insert n lines before current cursor line. */ 80 (void) __m_ptr_move((void **) w->_line, w->_maxy, 81 w->_maxy - n, w->_maxy - 1, w->_cury); 82 83 /* Blank lines inserted at the cursor line. */ 84 row = w->_cury; 85 } 86 87 /* Clear inserted/deleted lines. */ 88 (void) __m_cc_erase(w, row, 0, row + abs(n) - 1, w->_maxx - 1); 89 90 /* Mark from the cursor line to the end of window as dirty. */ 91 (void) wtouchln(w, w->_cury, w->_maxy - w->_cury, 1); 92 93 /* 94 * If we insert/delete lines at the top of the screen and we're, 95 * permitted to scroll, then treat the action as a scroll. 96 */ 97 if (w->_scroll && w->_cury == 0 && n != 0 && 98 (w->_flags & W_FULL_WINDOW) && w->_top == 0 && 99 w->_bottom == w->_maxy) 100 w->_scroll += (short) n; 101 else 102 w->_scroll = 0; 103 104 WSYNC(w); 105 106 return (WFLUSH(w)); 107 } 108