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