1/****************************************************************************
2 * Copyright (c) 1998-2007,2008 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 1.25 2008/06/07 14:12:56 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
61    T((T_CALLED("mvderwin(%p,%d,%d)"), win, y, x));
62
63    if (win && (orig = win->_parent)) {
64	if (win->_parx == x && win->_pary == y)
65	    returnCode(OK);
66	if (x < 0 || y < 0)
67	    returnCode(ERR);
68	if ((x + getmaxx(win) > getmaxx(orig)) ||
69	    (y + getmaxy(win) > getmaxy(orig)))
70	    returnCode(ERR);
71    } else
72	returnCode(ERR);
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    returnCode(OK);
79}
80
81NCURSES_EXPORT(int)
82syncok(WINDOW *win, bool bf)
83/* enable/disable automatic wsyncup() on each change to window */
84{
85    T((T_CALLED("syncok(%p,%d)"), win, bf));
86
87    if (win) {
88	win->_sync = bf;
89	returnCode(OK);
90    } else
91	returnCode(ERR);
92}
93
94NCURSES_EXPORT(void)
95wsyncup(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)"), 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
126NCURSES_EXPORT(void)
127wsyncdown(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)"), 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
164NCURSES_EXPORT(void)
165wcursyncup(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)"), 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
177NCURSES_EXPORT(WINDOW *)
178dupwin(WINDOW *win)
179/* make an exact duplicate of the given window */
180{
181    WINDOW *nwin = 0;
182    size_t linesize;
183    int i;
184
185    T((T_CALLED("dupwin(%p)"), win));
186
187    if (win != 0) {
188
189	_nc_lock_global(curses);
190	if (win->_flags & _ISPAD) {
191	    nwin = newpad(win->_maxy + 1,
192			  win->_maxx + 1);
193	} else {
194	    nwin = newwin(win->_maxy + 1,
195			  win->_maxx + 1,
196			  win->_begy,
197			  win->_begx);
198	}
199
200	if (nwin != 0) {
201
202	    nwin->_curx = win->_curx;
203	    nwin->_cury = win->_cury;
204	    nwin->_maxy = win->_maxy;
205	    nwin->_maxx = win->_maxx;
206	    nwin->_begy = win->_begy;
207	    nwin->_begx = win->_begx;
208	    nwin->_yoffset = win->_yoffset;
209
210	    nwin->_flags = win->_flags & ~_SUBWIN;
211	    /* Due to the use of newwin(), the clone is not a subwindow.
212	     * The text is really copied into the clone.
213	     */
214
215	    WINDOW_ATTRS(nwin) = WINDOW_ATTRS(win);
216	    nwin->_nc_bkgd = win->_nc_bkgd;
217
218	    nwin->_notimeout = win->_notimeout;
219	    nwin->_clear = win->_clear;
220	    nwin->_leaveok = win->_leaveok;
221	    nwin->_scroll = win->_scroll;
222	    nwin->_idlok = win->_idlok;
223	    nwin->_idcok = win->_idcok;
224	    nwin->_immed = win->_immed;
225	    nwin->_sync = win->_sync;
226	    nwin->_use_keypad = win->_use_keypad;
227	    nwin->_delay = win->_delay;
228
229	    nwin->_parx = 0;
230	    nwin->_pary = 0;
231	    nwin->_parent = (WINDOW *) 0;
232	    /* See above: the clone isn't a subwindow! */
233
234	    nwin->_regtop = win->_regtop;
235	    nwin->_regbottom = win->_regbottom;
236
237	    if (win->_flags & _ISPAD)
238		nwin->_pad = win->_pad;
239
240	    linesize = (win->_maxx + 1) * sizeof(NCURSES_CH_T);
241	    for (i = 0; i <= nwin->_maxy; i++) {
242		memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
243		nwin->_line[i].firstchar = win->_line[i].firstchar;
244		nwin->_line[i].lastchar = win->_line[i].lastchar;
245	    }
246	}
247	_nc_unlock_global(curses);
248    }
249    returnWin(nwin);
250}
251