1 /****************************************************************************
2 * Copyright 2020 Thomas E. Dickey *
3 * Copyright 1998-2010,2016 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 ****************************************************************************/
34
35 /*
36 ** lib_window.c
37 **
38 **
39 */
40
41 #include <curses.priv.h>
42
43 MODULE_ID("$Id: lib_window.c,v 1.31 2020/02/02 23:34:34 tom Exp $")
44
NCURSES_EXPORT(void)45 NCURSES_EXPORT(void)
46 _nc_synchook(WINDOW *win)
47 /* hook to be called after each window change */
48 {
49 if (win->_immed)
50 wrefresh(win);
51 if (win->_sync)
52 wsyncup(win);
53 }
54
55 NCURSES_EXPORT(int)
mvderwin(WINDOW * win,int y,int x)56 mvderwin(WINDOW *win, int y, int x)
57 /* move a derived window */
58 {
59 WINDOW *orig;
60 int rc = ERR;
61
62 T((T_CALLED("mvderwin(%p,%d,%d)"), (void *) win, y, x));
63
64 if (win != 0
65 && (orig = win->_parent) != 0
66 && (x >= 0 && y >= 0)
67 && (x + getmaxx(win) <= getmaxx(orig))
68 && (y + getmaxy(win) <= getmaxy(orig))) {
69 int i;
70
71 wsyncup(win);
72 win->_parx = x;
73 win->_pary = y;
74 for (i = 0; i < getmaxy(win); i++)
75 win->_line[i].text = &(orig->_line[y++].text[x]);
76 rc = OK;
77 }
78 returnCode(rc);
79 }
80
81 NCURSES_EXPORT(int)
syncok(WINDOW * win,bool bf)82 syncok(WINDOW *win, bool bf)
83 /* enable/disable automatic wsyncup() on each change to window */
84 {
85 T((T_CALLED("syncok(%p,%d)"), (void *) win, bf));
86
87 if (win) {
88 win->_sync = bf;
89 returnCode(OK);
90 } else
91 returnCode(ERR);
92 }
93
94 NCURSES_EXPORT(void)
wsyncup(WINDOW * win)95 wsyncup(WINDOW *win)
96 /* mark changed every cell in win's ancestors that is changed in win */
97 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */
98 {
99 WINDOW *wp;
100
101 T((T_CALLED("wsyncup(%p)"), (void *) win));
102 if (win && win->_parent) {
103 for (wp = win; wp->_parent; wp = wp->_parent) {
104 int y;
105 WINDOW *pp = wp->_parent;
106
107 assert((wp->_pary <= pp->_maxy) &&
108 ((wp->_pary + wp->_maxy) <= pp->_maxy));
109
110 for (y = 0; y <= wp->_maxy; y++) {
111 int left = wp->_line[y].firstchar;
112 if (left >= 0) { /* line is touched */
113 struct ldat *line = &(pp->_line[wp->_pary + y]);
114 /* left & right character in parent window coordinates */
115 int right = wp->_line[y].lastchar + wp->_parx;
116 left += wp->_parx;
117
118 CHANGED_RANGE(line, left, right);
119 }
120 }
121 }
122 }
123 returnVoid;
124 }
125
126 NCURSES_EXPORT(void)
wsyncdown(WINDOW * win)127 wsyncdown(WINDOW *win)
128 /* mark changed every cell in win that is changed in any of its ancestors */
129 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */
130 {
131 T((T_CALLED("wsyncdown(%p)"), (void *) win));
132
133 if (win && win->_parent) {
134 WINDOW *pp = win->_parent;
135 int y;
136
137 /* This recursion guarantees, that the changes are propagated down-
138 wards from the root to our direct parent. */
139 wsyncdown(pp);
140
141 /* and now we only have to propagate the changes from our direct
142 parent, if there are any. */
143 assert((win->_pary <= pp->_maxy) &&
144 ((win->_pary + win->_maxy) <= pp->_maxy));
145
146 for (y = 0; y <= win->_maxy; y++) {
147 if (pp->_line[win->_pary + y].firstchar >= 0) { /* parent changed */
148 struct ldat *line = &(win->_line[y]);
149 /* left and right character in child coordinates */
150 int left = pp->_line[win->_pary + y].firstchar - win->_parx;
151 int right = pp->_line[win->_pary + y].lastchar - win->_parx;
152 /* The change may be outside the child's range */
153 if (left < 0)
154 left = 0;
155 if (right > win->_maxx)
156 right = win->_maxx;
157 CHANGED_RANGE(line, left, right);
158 }
159 }
160 }
161 returnVoid;
162 }
163
164 NCURSES_EXPORT(void)
wcursyncup(WINDOW * win)165 wcursyncup(WINDOW *win)
166 /* sync the cursor in all derived windows to its value in the base window */
167 {
168 WINDOW *wp;
169
170 T((T_CALLED("wcursyncup(%p)"), (void *) win));
171 for (wp = win; wp && wp->_parent; wp = wp->_parent) {
172 wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx);
173 }
174 returnVoid;
175 }
176
177 NCURSES_EXPORT(WINDOW *)
dupwin(WINDOW * win)178 dupwin(WINDOW *win)
179 /* make an exact duplicate of the given window */
180 {
181 WINDOW *nwin = 0;
182
183 T((T_CALLED("dupwin(%p)"), (void *) win));
184
185 if (win != 0) {
186 #if NCURSES_SP_FUNCS
187 SCREEN *sp = _nc_screen_of(win);
188 #endif
189 _nc_lock_global(curses);
190 if (win->_flags & _ISPAD) {
191 nwin = NCURSES_SP_NAME(newpad) (NCURSES_SP_ARGx
192 win->_maxy + 1,
193 win->_maxx + 1);
194 } else {
195 nwin = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx
196 win->_maxy + 1,
197 win->_maxx + 1,
198 win->_begy,
199 win->_begx);
200 }
201
202 if (nwin != 0) {
203 int i;
204 size_t linesize;
205
206 nwin->_curx = win->_curx;
207 nwin->_cury = win->_cury;
208 nwin->_maxy = win->_maxy;
209 nwin->_maxx = win->_maxx;
210 nwin->_begy = win->_begy;
211 nwin->_begx = win->_begx;
212 nwin->_yoffset = win->_yoffset;
213
214 nwin->_flags = win->_flags & ~_SUBWIN;
215 /* Due to the use of newwin(), the clone is not a subwindow.
216 * The text is really copied into the clone.
217 */
218
219 WINDOW_ATTRS(nwin) = WINDOW_ATTRS(win);
220 nwin->_nc_bkgd = win->_nc_bkgd;
221
222 nwin->_notimeout = win->_notimeout;
223 nwin->_clear = win->_clear;
224 nwin->_leaveok = win->_leaveok;
225 nwin->_scroll = win->_scroll;
226 nwin->_idlok = win->_idlok;
227 nwin->_idcok = win->_idcok;
228 nwin->_immed = win->_immed;
229 nwin->_sync = win->_sync;
230 nwin->_use_keypad = win->_use_keypad;
231 nwin->_delay = win->_delay;
232
233 nwin->_parx = 0;
234 nwin->_pary = 0;
235 nwin->_parent = (WINDOW *) 0;
236 /* See above: the clone isn't a subwindow! */
237
238 nwin->_regtop = win->_regtop;
239 nwin->_regbottom = win->_regbottom;
240
241 if (win->_flags & _ISPAD)
242 nwin->_pad = win->_pad;
243
244 linesize = (unsigned) (win->_maxx + 1) * sizeof(NCURSES_CH_T);
245 for (i = 0; i <= nwin->_maxy; i++) {
246 memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
247 nwin->_line[i].firstchar = win->_line[i].firstchar;
248 nwin->_line[i].lastchar = win->_line[i].lastchar;
249 }
250 }
251 _nc_unlock_global(curses);
252 }
253 returnWin(nwin);
254 }
255