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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 #include	<sys/types.h>
45 #include	<string.h>
46 #include	"curses_inc.h"
47 
48 /*
49  * Insert/delete lines
50  * id < 0 : number of lines to delete
51  * id > 0 : number of lines to insert
52  */
53 
54 int
winsdelln(WINDOW * win,int id)55 winsdelln(WINDOW *win, int id)
56 {
57 	int	endy, endx, to, fr, num_lines, dir;
58 	chtype	*sw;
59 	char	*mk;
60 	bool	savimmed, savesync;
61 	short	x, y, quick, *begch, *endch;
62 #ifdef	_VR3_COMPAT_CODE
63 	/* LINTED */
64 	void		(*update_ptr)();
65 
66 	/*
67 	 * Null out the update pointer so that in wclrtoeol we do not
68 	 * update the _y16 area but we wait till the bottom of this
69 	 * function to do it in one fell swoop.
70 	 */
71 
72 	if (_y16update) {
73 		update_ptr = _y16update;
74 		_y16update = NULL;
75 	} else
76 		update_ptr = NULL;
77 #endif	/* _VR3_COMPAT_CODE */
78 
79 	if ((win->_cury >= win->_tmarg) && (win->_cury <= win->_bmarg))
80 		endy = win->_bmarg + 1;
81 	else
82 		endy = win->_maxy;
83 
84 	if (id < 0) {
85 		/*
86 		 * Check that the amount of lines to delete aren't larger
87 		 * than the window.  We save num_lines only so that we
88 		 * don't have to re-compute if the if comes out true.
89 		 */
90 
91 		if ((num_lines = win->_cury - endy) > id)
92 			id = num_lines;
93 
94 		/*
95 		 * "fr" is the line that we are coming "fr"om and
96 		 * moving "to" the new place.  This is the offset which
97 		 * we have to re-align our pointers by.
98 		 * We want to start setting the current line's pointer
99 		 * to point to the offset's line.  We want to move line "fr"
100 		 * to line "to".
101 		 */
102 
103 		to = win->_cury;
104 		fr = to - id;
105 		num_lines = endy - fr;
106 		dir = 1;
107 	} else {
108 		/* can't insert more lines than are in the region */
109 		if ((num_lines = endy - win->_cury) < id)
110 			id = num_lines;
111 
112 		to = endy - 1;
113 		fr = to - id;
114 		num_lines = fr - (win->_cury - 1);
115 		dir = -1;
116 	}
117 
118 	/*
119 	 * If this window has no parents or children, then we can manipulate
120 	 * pointers to simulate insert/delete line.  Otherwise,
121 	 * to propogate the changes to parents and siblings
122 	 * we have to memcpy the text around.
123 	 *
124 	 * Set quick to tell us which we have to do.
125 	 */
126 	quick = ((win->_ndescs <= 0) && (win->_parent == NULL));
127 
128 	begch = win->_firstch;
129 	endch = win->_lastch;
130 	endx = win->_maxx;
131 
132 	for (; num_lines > 0; num_lines--, to += dir, fr += dir) {
133 		/* can be done quickly */
134 		if (quick) {
135 			sw = win->_y[to];
136 			win->_y[to] = win->_y[fr];
137 			win->_y[fr] = sw;
138 			if ((win == curscr) && _MARKS != NULL) {
139 				mk = _MARKS[to];
140 				_MARKS[to] = _MARKS[fr];
141 				_MARKS[fr] = mk;
142 
143 				/* for color terminal do the same for */
144 				/* color marks */
145 
146 				if (_COLOR_MARKS != NULL) {
147 					mk = _COLOR_MARKS[to];
148 					_COLOR_MARKS[to] = _COLOR_MARKS[fr];
149 					_COLOR_MARKS[fr] = mk;
150 				}
151 			}
152 		} else
153 			/* slow update */
154 			(void) memcpy((char *) win->_y[to], (char *)
155 			    win->_y[fr], (endx * sizeof (chtype)));
156 
157 
158 		/*
159 		 * If this is curscr, the firstch[] and lastch[]
160 		 * arrays contain blank information.
161 		 */
162 
163 		if (win == curscr) {
164 			begch[to] = begch[fr];
165 			endch[to] = endch[fr];
166 			_CURHASH[to] = _CURHASH[fr];
167 		} else {
168 			/* regular window, update the change structure */
169 			begch[to] = 0;
170 			endch[to] = endx - 1;
171 		}
172 	}
173 
174 	/* clear the insert/delete lines */
175 	if (id < 0)
176 		num_lines = endy - to;
177 	else
178 		num_lines = to - (win->_cury - 1);
179 
180 	if (num_lines > 0) {		/* Is this if needed ? */
181 		savimmed = win->_immed;
182 		savesync = win->_sync;
183 		win->_immed = win->_sync = FALSE;
184 		x = win->_curx;
185 		y = win->_cury;
186 
187 		win->_curx = 0;
188 		for (; num_lines > 0; --num_lines, to += dir) {
189 			/* LINTED */
190 			win->_cury = (short) to;
191 			(void) wclrtoeol(win);
192 		}
193 
194 		win->_curx = x;
195 		win->_cury = y;
196 		win->_immed = savimmed;
197 		win->_sync = savesync;
198 	}
199 	win->_flags |= (_WINCHANGED|_WINSDEL);
200 
201 #ifdef	_VR3_COMPAT_CODE
202 	if (update_ptr) {
203 		_y16update = update_ptr;
204 		(*_y16update)(win, endy - y, endx, y, 0);
205 	}
206 #endif	/* _VR3_COMPAT_CODE */
207 
208 	if (win->_sync)
209 		wsyncup(win);
210 
211 	return ((win != curscr && savimmed) ? wrefresh(win) : OK);
212 }
213