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