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