1fdd4e1e0SJan Lentfer /****************************************************************************
2*32bb5217SDaniel Fojt * Copyright 2020 Thomas E. Dickey *
3*32bb5217SDaniel Fojt * Copyright 1998-2013,2016 Free Software Foundation, Inc. *
4fdd4e1e0SJan Lentfer * *
5fdd4e1e0SJan Lentfer * Permission is hereby granted, free of charge, to any person obtaining a *
6fdd4e1e0SJan Lentfer * copy of this software and associated documentation files (the *
7fdd4e1e0SJan Lentfer * "Software"), to deal in the Software without restriction, including *
8fdd4e1e0SJan Lentfer * without limitation the rights to use, copy, modify, merge, publish, *
9fdd4e1e0SJan Lentfer * distribute, distribute with modifications, sublicense, and/or sell *
10fdd4e1e0SJan Lentfer * copies of the Software, and to permit persons to whom the Software is *
11fdd4e1e0SJan Lentfer * furnished to do so, subject to the following conditions: *
12fdd4e1e0SJan Lentfer * *
13fdd4e1e0SJan Lentfer * The above copyright notice and this permission notice shall be included *
14fdd4e1e0SJan Lentfer * in all copies or substantial portions of the Software. *
15fdd4e1e0SJan Lentfer * *
16fdd4e1e0SJan Lentfer * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17fdd4e1e0SJan Lentfer * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18fdd4e1e0SJan Lentfer * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19fdd4e1e0SJan Lentfer * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20fdd4e1e0SJan Lentfer * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21fdd4e1e0SJan Lentfer * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22fdd4e1e0SJan Lentfer * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23fdd4e1e0SJan Lentfer * *
24fdd4e1e0SJan Lentfer * Except as contained in this notice, the name(s) of the above copyright *
25fdd4e1e0SJan Lentfer * holders shall not be used in advertising or otherwise to promote the *
26fdd4e1e0SJan Lentfer * sale, use or other dealings in this Software without prior written *
27fdd4e1e0SJan Lentfer * authorization. *
28fdd4e1e0SJan Lentfer ****************************************************************************/
29fdd4e1e0SJan Lentfer
30fdd4e1e0SJan Lentfer /****************************************************************************
31fdd4e1e0SJan Lentfer * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32fdd4e1e0SJan Lentfer * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33fdd4e1e0SJan Lentfer ****************************************************************************/
34fdd4e1e0SJan Lentfer
35fdd4e1e0SJan Lentfer /*
36fdd4e1e0SJan Lentfer ** lib_overlay.c
37fdd4e1e0SJan Lentfer **
38fdd4e1e0SJan Lentfer ** The routines overlay(), copywin(), and overwrite().
39fdd4e1e0SJan Lentfer **
40fdd4e1e0SJan Lentfer */
41fdd4e1e0SJan Lentfer
42fdd4e1e0SJan Lentfer #include <curses.priv.h>
43fdd4e1e0SJan Lentfer
44*32bb5217SDaniel Fojt MODULE_ID("$Id: lib_overlay.c,v 1.33 2020/02/02 23:34:34 tom Exp $")
45fdd4e1e0SJan Lentfer
46fdd4e1e0SJan Lentfer static int
overlap(const WINDOW * const src,WINDOW * const dst,int const flag)471d102085SJan Lentfer overlap(const WINDOW *const src, WINDOW *const dst, int const flag)
48fdd4e1e0SJan Lentfer {
491d102085SJan Lentfer int rc = ERR;
50fdd4e1e0SJan Lentfer
5100d8f3c4SJohn Marino T((T_CALLED("overlap(%p,%p,%d)"), (const void *) src, (void *) dst, flag));
52fdd4e1e0SJan Lentfer
531d102085SJan Lentfer if (src != 0 && dst != 0) {
54*32bb5217SDaniel Fojt int sx1, sy1, sx2, sy2;
55*32bb5217SDaniel Fojt int dx1, dy1, dx2, dy2;
56*32bb5217SDaniel Fojt
571d102085SJan Lentfer _nc_lock_global(curses);
58fdd4e1e0SJan Lentfer
591d102085SJan Lentfer T(("src : begy %ld, begx %ld, maxy %ld, maxx %ld",
601d102085SJan Lentfer (long) src->_begy,
611d102085SJan Lentfer (long) src->_begx,
621d102085SJan Lentfer (long) src->_maxy,
631d102085SJan Lentfer (long) src->_maxx));
641d102085SJan Lentfer T(("dst : begy %ld, begx %ld, maxy %ld, maxx %ld",
651d102085SJan Lentfer (long) dst->_begy,
661d102085SJan Lentfer (long) dst->_begx,
671d102085SJan Lentfer (long) dst->_maxy,
681d102085SJan Lentfer (long) dst->_maxx));
69fdd4e1e0SJan Lentfer
701d102085SJan Lentfer sx1 = src->_begx;
711d102085SJan Lentfer sy1 = src->_begy;
721d102085SJan Lentfer sx2 = sx1 + src->_maxx;
731d102085SJan Lentfer sy2 = sy1 + src->_maxy;
74fdd4e1e0SJan Lentfer
751d102085SJan Lentfer dx1 = dst->_begx;
761d102085SJan Lentfer dy1 = dst->_begy;
771d102085SJan Lentfer dx2 = dx1 + dst->_maxx;
781d102085SJan Lentfer dy2 = dy1 + dst->_maxy;
791d102085SJan Lentfer
801d102085SJan Lentfer if (dx2 >= sx1 && dx1 <= sx2 && dy2 >= sy1 && dy1 <= sy2) {
81*32bb5217SDaniel Fojt int sminrow = max(sy1, dy1) - sy1;
82*32bb5217SDaniel Fojt int smincol = max(sx1, dx1) - sx1;
83*32bb5217SDaniel Fojt int dminrow = max(sy1, dy1) - dy1;
84*32bb5217SDaniel Fojt int dmincol = max(sx1, dx1) - dx1;
85*32bb5217SDaniel Fojt int dmaxrow = min(sy2, dy2) - dy1;
86*32bb5217SDaniel Fojt int dmaxcol = min(sx2, dx2) - dx1;
87fdd4e1e0SJan Lentfer
881d102085SJan Lentfer rc = copywin(src, dst,
89fdd4e1e0SJan Lentfer sminrow, smincol,
90fdd4e1e0SJan Lentfer dminrow, dmincol,
91fdd4e1e0SJan Lentfer dmaxrow, dmaxcol,
921d102085SJan Lentfer flag);
93fdd4e1e0SJan Lentfer }
941d102085SJan Lentfer _nc_unlock_global(curses);
95fdd4e1e0SJan Lentfer }
961d102085SJan Lentfer returnCode(rc);
97fdd4e1e0SJan Lentfer }
98fdd4e1e0SJan Lentfer
99fdd4e1e0SJan Lentfer /*
100fdd4e1e0SJan Lentfer **
101fdd4e1e0SJan Lentfer ** overlay(win1, win2)
102fdd4e1e0SJan Lentfer **
103fdd4e1e0SJan Lentfer **
104fdd4e1e0SJan Lentfer ** overlay() writes the overlapping area of win1 behind win2
105fdd4e1e0SJan Lentfer ** on win2 non-destructively.
106fdd4e1e0SJan Lentfer **
107fdd4e1e0SJan Lentfer **/
108fdd4e1e0SJan Lentfer
109fdd4e1e0SJan Lentfer NCURSES_EXPORT(int)
overlay(const WINDOW * win1,WINDOW * win2)110fdd4e1e0SJan Lentfer overlay(const WINDOW *win1, WINDOW *win2)
111fdd4e1e0SJan Lentfer {
11200d8f3c4SJohn Marino T((T_CALLED("overlay(%p,%p)"), (const void *) win1, (void *) win2));
113fdd4e1e0SJan Lentfer returnCode(overlap(win1, win2, TRUE));
114fdd4e1e0SJan Lentfer }
115fdd4e1e0SJan Lentfer
116fdd4e1e0SJan Lentfer /*
117fdd4e1e0SJan Lentfer **
118fdd4e1e0SJan Lentfer ** overwrite(win1, win2)
119fdd4e1e0SJan Lentfer **
120fdd4e1e0SJan Lentfer **
121fdd4e1e0SJan Lentfer ** overwrite() writes the overlapping area of win1 behind win2
122fdd4e1e0SJan Lentfer ** on win2 destructively.
123fdd4e1e0SJan Lentfer **
124fdd4e1e0SJan Lentfer **/
125fdd4e1e0SJan Lentfer
126fdd4e1e0SJan Lentfer NCURSES_EXPORT(int)
overwrite(const WINDOW * win1,WINDOW * win2)127fdd4e1e0SJan Lentfer overwrite(const WINDOW *win1, WINDOW *win2)
128fdd4e1e0SJan Lentfer {
12900d8f3c4SJohn Marino T((T_CALLED("overwrite(%p,%p)"), (const void *) win1, (void *) win2));
130fdd4e1e0SJan Lentfer returnCode(overlap(win1, win2, FALSE));
131fdd4e1e0SJan Lentfer }
132fdd4e1e0SJan Lentfer
133fdd4e1e0SJan Lentfer NCURSES_EXPORT(int)
copywin(const WINDOW * src,WINDOW * dst,int sminrow,int smincol,int dminrow,int dmincol,int dmaxrow,int dmaxcol,int over)134fdd4e1e0SJan Lentfer copywin(const WINDOW *src, WINDOW *dst,
135fdd4e1e0SJan Lentfer int sminrow, int smincol,
136fdd4e1e0SJan Lentfer int dminrow, int dmincol,
137fdd4e1e0SJan Lentfer int dmaxrow, int dmaxcol,
138fdd4e1e0SJan Lentfer int over)
139fdd4e1e0SJan Lentfer {
1401d102085SJan Lentfer int rc = ERR;
141fdd4e1e0SJan Lentfer
142fdd4e1e0SJan Lentfer T((T_CALLED("copywin(%p, %p, %d, %d, %d, %d, %d, %d, %d)"),
14300d8f3c4SJohn Marino (const void *) src,
14400d8f3c4SJohn Marino (void *) dst,
14500d8f3c4SJohn Marino sminrow, smincol,
14600d8f3c4SJohn Marino dminrow, dmincol,
14700d8f3c4SJohn Marino dmaxrow, dmaxcol, over));
148fdd4e1e0SJan Lentfer
1493468e90cSJohn Marino if (src != 0
1503468e90cSJohn Marino && dst != 0
1513468e90cSJohn Marino && dmaxrow >= dminrow
1523468e90cSJohn Marino && dmaxcol >= dmincol) {
153*32bb5217SDaniel Fojt attr_t bk;
154*32bb5217SDaniel Fojt attr_t mask;
155*32bb5217SDaniel Fojt
1561d102085SJan Lentfer _nc_lock_global(curses);
1571d102085SJan Lentfer
1581d102085SJan Lentfer bk = AttrOf(dst->_nc_bkgd);
1591d102085SJan Lentfer mask = ~(attr_t) ((bk & A_COLOR) ? A_COLOR : 0);
160fdd4e1e0SJan Lentfer
161fdd4e1e0SJan Lentfer /* make sure rectangle exists in source */
1621d102085SJan Lentfer if ((sminrow + dmaxrow - dminrow) <= (src->_maxy + 1) &&
1631d102085SJan Lentfer (smincol + dmaxcol - dmincol) <= (src->_maxx + 1)) {
164fdd4e1e0SJan Lentfer
165fdd4e1e0SJan Lentfer T(("rectangle exists in source"));
166fdd4e1e0SJan Lentfer
167fdd4e1e0SJan Lentfer /* make sure rectangle fits in destination */
1681d102085SJan Lentfer if (dmaxrow <= dst->_maxy && dmaxcol <= dst->_maxx) {
169*32bb5217SDaniel Fojt int sx, sy, dx, dy;
170*32bb5217SDaniel Fojt bool copied = FALSE;
171fdd4e1e0SJan Lentfer
172fdd4e1e0SJan Lentfer T(("rectangle fits in destination"));
173fdd4e1e0SJan Lentfer
1741d102085SJan Lentfer for (dy = dminrow, sy = sminrow;
1751d102085SJan Lentfer dy <= dmaxrow;
1761d102085SJan Lentfer sy++, dy++) {
177*32bb5217SDaniel Fojt bool touched;
1781d102085SJan Lentfer
1793468e90cSJohn Marino if (dy < 0 || sy < 0)
1803468e90cSJohn Marino continue;
1813468e90cSJohn Marino
182fdd4e1e0SJan Lentfer touched = FALSE;
1831d102085SJan Lentfer for (dx = dmincol, sx = smincol;
1841d102085SJan Lentfer dx <= dmaxcol;
1851d102085SJan Lentfer sx++, dx++) {
1863468e90cSJohn Marino
1873468e90cSJohn Marino if (dx < 0 || sx < 0)
1883468e90cSJohn Marino continue;
1893468e90cSJohn Marino copied = TRUE;
1903468e90cSJohn Marino
191fdd4e1e0SJan Lentfer if (over) {
192fdd4e1e0SJan Lentfer if ((CharOf(src->_line[sy].text[sx]) != L(' ')) &&
1931d102085SJan Lentfer (!CharEq(dst->_line[dy].text[dx],
1941d102085SJan Lentfer src->_line[sy].text[sx]))) {
1951d102085SJan Lentfer dst->_line[dy].text[dx] =
1961d102085SJan Lentfer src->_line[sy].text[sx];
197fdd4e1e0SJan Lentfer SetAttr(dst->_line[dy].text[dx],
1981d102085SJan Lentfer ((AttrOf(src->_line[sy].text[sx]) &
1991d102085SJan Lentfer mask) | bk));
200fdd4e1e0SJan Lentfer touched = TRUE;
201fdd4e1e0SJan Lentfer }
202fdd4e1e0SJan Lentfer } else {
2031d102085SJan Lentfer if (!CharEq(dst->_line[dy].text[dx],
2041d102085SJan Lentfer src->_line[sy].text[sx])) {
2051d102085SJan Lentfer dst->_line[dy].text[dx] =
2061d102085SJan Lentfer src->_line[sy].text[sx];
207fdd4e1e0SJan Lentfer touched = TRUE;
208fdd4e1e0SJan Lentfer }
209fdd4e1e0SJan Lentfer }
210fdd4e1e0SJan Lentfer }
211fdd4e1e0SJan Lentfer if (touched) {
212fdd4e1e0SJan Lentfer touchline(dst, dminrow, (dmaxrow - dminrow + 1));
213fdd4e1e0SJan Lentfer }
214fdd4e1e0SJan Lentfer }
215fdd4e1e0SJan Lentfer T(("finished copywin"));
2163468e90cSJohn Marino if (copied)
2171d102085SJan Lentfer rc = OK;
2181d102085SJan Lentfer }
2191d102085SJan Lentfer }
2201d102085SJan Lentfer _nc_unlock_global(curses);
2211d102085SJan Lentfer }
2221d102085SJan Lentfer returnCode(rc);
223fdd4e1e0SJan Lentfer }
224