1 /* $OpenBSD: lib_window.c,v 1.4 2023/10/17 09:52:09 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2020,2021 Thomas E. Dickey *
5 * Copyright 1998-2010,2016 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
34 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
35 ****************************************************************************/
36
37 /*
38 ** lib_window.c
39 **
40 **
41 */
42
43 #include <curses.priv.h>
44
45 MODULE_ID("$Id: lib_window.c,v 1.4 2023/10/17 09:52:09 nicm Exp $")
46
NCURSES_EXPORT(void)47 NCURSES_EXPORT(void)
48 _nc_synchook(WINDOW *win)
49 /* hook to be called after each window change */
50 {
51 if (win->_immed)
52 wrefresh(win);
53 if (win->_sync)
54 wsyncup(win);
55 }
56
57 NCURSES_EXPORT(int)
mvderwin(WINDOW * win,int y,int x)58 mvderwin(WINDOW *win, int y, int x)
59 /* move a derived window */
60 {
61 WINDOW *orig;
62 int rc = ERR;
63
64 T((T_CALLED("mvderwin(%p,%d,%d)"), (void *) win, y, x));
65
66 if (win != 0
67 && (orig = win->_parent) != 0
68 && (x >= 0 && y >= 0)
69 && (x + getmaxx(win) <= getmaxx(orig))
70 && (y + getmaxy(win) <= getmaxy(orig))) {
71 int i;
72
73 wsyncup(win);
74 win->_parx = x;
75 win->_pary = y;
76 for (i = 0; i < getmaxy(win); i++)
77 win->_line[i].text = &(orig->_line[y++].text[x]);
78 rc = OK;
79 }
80 returnCode(rc);
81 }
82
83 NCURSES_EXPORT(int)
syncok(WINDOW * win,bool bf)84 syncok(WINDOW *win, bool bf)
85 /* enable/disable automatic wsyncup() on each change to window */
86 {
87 T((T_CALLED("syncok(%p,%d)"), (void *) win, bf));
88
89 if (win) {
90 win->_sync = bf;
91 returnCode(OK);
92 } else
93 returnCode(ERR);
94 }
95
96 NCURSES_EXPORT(void)
wsyncup(WINDOW * win)97 wsyncup(WINDOW *win)
98 /* mark changed every cell in win's ancestors that is changed in win */
99 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */
100 {
101 WINDOW *wp;
102
103 T((T_CALLED("wsyncup(%p)"), (void *) win));
104 if (win && win->_parent) {
105 for (wp = win; wp->_parent; wp = wp->_parent) {
106 int y;
107 WINDOW *pp = wp->_parent;
108
109 assert((wp->_pary <= pp->_maxy) &&
110 ((wp->_pary + wp->_maxy) <= pp->_maxy));
111
112 for (y = 0; y <= wp->_maxy; y++) {
113 int left = wp->_line[y].firstchar;
114 if (left >= 0) { /* line is touched */
115 struct ldat *line = &(pp->_line[wp->_pary + y]);
116 /* left & right character in parent window coordinates */
117 int right = wp->_line[y].lastchar + wp->_parx;
118 left += wp->_parx;
119
120 CHANGED_RANGE(line, left, right);
121 }
122 }
123 }
124 }
125 returnVoid;
126 }
127
128 NCURSES_EXPORT(void)
wsyncdown(WINDOW * win)129 wsyncdown(WINDOW *win)
130 /* mark changed every cell in win that is changed in any of its ancestors */
131 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */
132 {
133 T((T_CALLED("wsyncdown(%p)"), (void *) win));
134
135 if (win != NULL && win->_parent != NULL) {
136 WINDOW *pp = win->_parent;
137 int y;
138
139 /* This recursion guarantees, that the changes are propagated down-
140 wards from the root to our direct parent. */
141 wsyncdown(pp);
142
143 /* and now we only have to propagate the changes from our direct
144 parent, if there are any. */
145 assert((win->_pary <= pp->_maxy) &&
146 ((win->_pary + win->_maxy) <= pp->_maxy));
147
148 for (y = 0; y <= win->_maxy; y++) {
149 if (pp->_line[win->_pary + y].firstchar >= 0) { /* parent changed */
150 struct ldat *line = &(win->_line[y]);
151 /* left and right character in child coordinates */
152 int left = pp->_line[win->_pary + y].firstchar - win->_parx;
153 int right = pp->_line[win->_pary + y].lastchar - win->_parx;
154 /* The change may be outside the child's range */
155 if (left < 0)
156 left = 0;
157 if (right > win->_maxx)
158 right = win->_maxx;
159 CHANGED_RANGE(line, left, right);
160 }
161 }
162 }
163 returnVoid;
164 }
165
166 NCURSES_EXPORT(void)
wcursyncup(WINDOW * win)167 wcursyncup(WINDOW *win)
168 /* sync the cursor in all derived windows to its value in the base window */
169 {
170 WINDOW *wp;
171
172 T((T_CALLED("wcursyncup(%p)"), (void *) win));
173 for (wp = win; wp && wp->_parent; wp = wp->_parent) {
174 wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx);
175 }
176 returnVoid;
177 }
178
179 NCURSES_EXPORT(WINDOW *)
dupwin(WINDOW * win)180 dupwin(WINDOW *win)
181 /* make an exact duplicate of the given window */
182 {
183 WINDOW *nwin = 0;
184
185 T((T_CALLED("dupwin(%p)"), (void *) win));
186
187 if (win != 0) {
188 #if NCURSES_SP_FUNCS
189 SCREEN *sp = _nc_screen_of(win);
190 #endif
191 _nc_lock_global(curses);
192 if (IS_PAD(win)) {
193 nwin = NCURSES_SP_NAME(newpad) (NCURSES_SP_ARGx
194 win->_maxy + 1,
195 win->_maxx + 1);
196 } else {
197 nwin = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx
198 win->_maxy + 1,
199 win->_maxx + 1,
200 win->_begy,
201 win->_begx);
202 }
203
204 if (nwin != 0) {
205 int i;
206 size_t linesize;
207
208 nwin->_curx = win->_curx;
209 nwin->_cury = win->_cury;
210 nwin->_maxy = win->_maxy;
211 nwin->_maxx = win->_maxx;
212 nwin->_begy = win->_begy;
213 nwin->_begx = win->_begx;
214 nwin->_yoffset = win->_yoffset;
215
216 nwin->_flags = win->_flags & ~_SUBWIN;
217 /* Due to the use of newwin(), the clone is not a subwindow.
218 * The text is really copied into the clone.
219 */
220
221 WINDOW_ATTRS(nwin) = WINDOW_ATTRS(win);
222 nwin->_nc_bkgd = win->_nc_bkgd;
223
224 nwin->_notimeout = win->_notimeout;
225 nwin->_clear = win->_clear;
226 nwin->_leaveok = win->_leaveok;
227 nwin->_scroll = win->_scroll;
228 nwin->_idlok = win->_idlok;
229 nwin->_idcok = win->_idcok;
230 nwin->_immed = win->_immed;
231 nwin->_sync = win->_sync;
232 nwin->_use_keypad = win->_use_keypad;
233 nwin->_delay = win->_delay;
234
235 nwin->_parx = 0;
236 nwin->_pary = 0;
237 nwin->_parent = (WINDOW *) 0;
238 /* See above: the clone isn't a subwindow! */
239
240 nwin->_regtop = win->_regtop;
241 nwin->_regbottom = win->_regbottom;
242
243 if (IS_PAD(win))
244 nwin->_pad = win->_pad;
245
246 linesize = (unsigned) (win->_maxx + 1) * sizeof(NCURSES_CH_T);
247 for (i = 0; i <= nwin->_maxy; i++) {
248 memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
249 nwin->_line[i].firstchar = win->_line[i].firstchar;
250 nwin->_line[i].lastchar = win->_line[i].lastchar;
251 }
252 }
253 _nc_unlock_global(curses);
254 }
255 returnWin(nwin);
256 }
257