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, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 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[] = "$Header: /rd/src/libc/xcurses/rcs/winsdel.c 1.4 1995/06/21 20:31:02 ant Exp $"; 41 #endif 42 #endif 43 44 #include <private.h> 45 #include <stdlib.h> 46 47 /*f 48 * Insert/delete rows from a window. 49 * 50 * Positive N inserts rows and negative N deletes. The size of the 51 * window remains fixed so that rows insert/deleted will cause rows to 52 * disappear/appear at the end of the window. 53 * 54 * NOTE: This routine called in doupdate.c with curscr as window. 55 */ 56 int 57 winsdelln(w, n) 58 WINDOW *w; 59 int n; 60 { 61 int row; 62 63 #ifdef M_CURSES_TRACE 64 __m_trace("winsdelln(%p, %d)", w, n); 65 #endif 66 67 /* Check bounds and limit if necessary. */ 68 if (w->_maxy < w->_cury + abs(n)) 69 n = (w->_maxy - w->_cury + 1) * (n < 0 ? -1 : 1); 70 71 /* Insert/delete accomplished by pointer shuffling. */ 72 if (n < 0) { 73 /* Delete n lines from current cursor line. */ 74 (void) __m_ptr_move( 75 (void **) w->_line, w->_maxy, 76 w->_cury, w->_cury - (n+1), w->_maxy 77 ); 78 79 /* Blank lines come in at the bottom of the screen. */ 80 row = w->_maxy + n; 81 } else { 82 /* Insert n lines before current cursor line. */ 83 (void) __m_ptr_move( 84 (void **) w->_line, w->_maxy, 85 w->_maxy - n, w->_maxy-1, w->_cury 86 ); 87 88 /* Blank lines inserted at the cursor line. */ 89 row = w->_cury; 90 } 91 92 /* Clear inserted/deleted lines. */ 93 (void) __m_cc_erase(w, row, 0, row + abs(n), w->_maxx-1); 94 95 /* Mark from the cursor line to the end of window as dirty. */ 96 (void) wtouchln(w, w->_cury, w->_maxy - w->_cury, 1); 97 98 /* If we insert/delete lines at the top of the screen and we're, 99 * permitted to scroll, then treat the action as a scroll. 100 */ 101 if (w->_scroll && w->_cury == 0 && n != 0 && (w->_flags & W_FULL_WINDOW) 102 && w->_top == 0 && w->_bottom == w->_maxy) 103 w->_scroll += n; 104 else 105 w->_scroll = 0; 106 107 WSYNC(w); 108 109 return __m_return_code("winsdelln", WFLUSH(w)); 110 } 111 112