1/****************************************************************************
2 * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34/*
35**	lib_window.c
36**
37**
38*/
39
40#include <curses.priv.h>
41
42MODULE_ID("$Id: lib_window.c,v 1.29 2010/12/19 01:47:22 tom Exp $")
43
44NCURSES_EXPORT(void)
45_nc_synchook(WINDOW *win)
46/* hook to be called after each window change */
47{
48    if (win->_immed)
49	wrefresh(win);
50    if (win->_sync)
51	wsyncup(win);
52}
53
54NCURSES_EXPORT(int)
55mvderwin(WINDOW *win, int y, int x)
56/* move a derived window */
57{
58    WINDOW *orig;
59    int i;
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	wsyncup(win);
70	win->_parx = x;
71	win->_pary = y;
72	for (i = 0; i < getmaxy(win); i++)
73	    win->_line[i].text = &(orig->_line[y++].text[x]);
74	rc = OK;
75    }
76    returnCode(rc);
77}
78
79NCURSES_EXPORT(int)
80syncok(WINDOW *win, bool bf)
81/* enable/disable automatic wsyncup() on each change to window */
82{
83    T((T_CALLED("syncok(%p,%d)"), (void *) win, bf));
84
85    if (win) {
86	win->_sync = bf;
87	returnCode(OK);
88    } else
89	returnCode(ERR);
90}
91
92NCURSES_EXPORT(void)
93wsyncup(WINDOW *win)
94/* mark changed every cell in win's ancestors that is changed in win */
95/* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)      */
96{
97    WINDOW *wp;
98
99    T((T_CALLED("wsyncup(%p)"), (void *) win));
100    if (win && win->_parent) {
101	for (wp = win; wp->_parent; wp = wp->_parent) {
102	    int y;
103	    WINDOW *pp = wp->_parent;
104
105	    assert((wp->_pary <= pp->_maxy) &&
106		   ((wp->_pary + wp->_maxy) <= pp->_maxy));
107
108	    for (y = 0; y <= wp->_maxy; y++) {
109		int left = wp->_line[y].firstchar;
110		if (left >= 0) {	/* line is touched */
111		    struct ldat *line = &(pp->_line[wp->_pary + y]);
112		    /* left & right character in parent window coordinates */
113		    int right = wp->_line[y].lastchar + wp->_parx;
114		    left += wp->_parx;
115
116		    CHANGED_RANGE(line, left, right);
117		}
118	    }
119	}
120    }
121    returnVoid;
122}
123
124NCURSES_EXPORT(void)
125wsyncdown(WINDOW *win)
126/* mark changed every cell in win that is changed in any of its ancestors */
127/* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)           */
128{
129    T((T_CALLED("wsyncdown(%p)"), (void *) win));
130
131    if (win && win->_parent) {
132	WINDOW *pp = win->_parent;
133	int y;
134
135	/* This recursion guarantees, that the changes are propagated down-
136	   wards from the root to our direct parent. */
137	wsyncdown(pp);
138
139	/* and now we only have to propagate the changes from our direct
140	   parent, if there are any. */
141	assert((win->_pary <= pp->_maxy) &&
142	       ((win->_pary + win->_maxy) <= pp->_maxy));
143
144	for (y = 0; y <= win->_maxy; y++) {
145	    if (pp->_line[win->_pary + y].firstchar >= 0) {	/* parent changed */
146		struct ldat *line = &(win->_line[y]);
147		/* left and right character in child coordinates */
148		int left = pp->_line[win->_pary + y].firstchar - win->_parx;
149		int right = pp->_line[win->_pary + y].lastchar - win->_parx;
150		/* The change may be outside the child's range */
151		if (left < 0)
152		    left = 0;
153		if (right > win->_maxx)
154		    right = win->_maxx;
155		CHANGED_RANGE(line, left, right);
156	    }
157	}
158    }
159    returnVoid;
160}
161
162NCURSES_EXPORT(void)
163wcursyncup(WINDOW *win)
164/* sync the cursor in all derived windows to its value in the base window */
165{
166    WINDOW *wp;
167
168    T((T_CALLED("wcursyncup(%p)"), (void *) win));
169    for (wp = win; wp && wp->_parent; wp = wp->_parent) {
170	wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx);
171    }
172    returnVoid;
173}
174
175NCURSES_EXPORT(WINDOW *)
176dupwin(WINDOW *win)
177/* make an exact duplicate of the given window */
178{
179    WINDOW *nwin = 0;
180    size_t linesize;
181    int i;
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
204	    nwin->_curx = win->_curx;
205	    nwin->_cury = win->_cury;
206	    nwin->_maxy = win->_maxy;
207	    nwin->_maxx = win->_maxx;
208	    nwin->_begy = win->_begy;
209	    nwin->_begx = win->_begx;
210	    nwin->_yoffset = win->_yoffset;
211
212	    nwin->_flags = win->_flags & ~_SUBWIN;
213	    /* Due to the use of newwin(), the clone is not a subwindow.
214	     * The text is really copied into the clone.
215	     */
216
217	    WINDOW_ATTRS(nwin) = WINDOW_ATTRS(win);
218	    nwin->_nc_bkgd = win->_nc_bkgd;
219
220	    nwin->_notimeout = win->_notimeout;
221	    nwin->_clear = win->_clear;
222	    nwin->_leaveok = win->_leaveok;
223	    nwin->_scroll = win->_scroll;
224	    nwin->_idlok = win->_idlok;
225	    nwin->_idcok = win->_idcok;
226	    nwin->_immed = win->_immed;
227	    nwin->_sync = win->_sync;
228	    nwin->_use_keypad = win->_use_keypad;
229	    nwin->_delay = win->_delay;
230
231	    nwin->_parx = 0;
232	    nwin->_pary = 0;
233	    nwin->_parent = (WINDOW *) 0;
234	    /* See above: the clone isn't a subwindow! */
235
236	    nwin->_regtop = win->_regtop;
237	    nwin->_regbottom = win->_regbottom;
238
239	    if (win->_flags & _ISPAD)
240		nwin->_pad = win->_pad;
241
242	    linesize = (unsigned) (win->_maxx + 1) * sizeof(NCURSES_CH_T);
243	    for (i = 0; i <= nwin->_maxy; i++) {
244		memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
245		nwin->_line[i].firstchar = win->_line[i].firstchar;
246		nwin->_line[i].lastchar = win->_line[i].lastchar;
247	    }
248	}
249	_nc_unlock_global(curses);
250    }
251    returnWin(nwin);
252}
253