lib_window.c revision 76726 
1/****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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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 1.15 2000/12/10 02:43:28 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    if (win && win->_parent)
102	for (wp = win; wp->_parent; wp = wp->_parent) {
103	    int y;
104	    WINDOW *pp = wp->_parent;
105
106	    assert((wp->_pary <= pp->_maxy) &&
107		   ((wp->_pary + wp->_maxy) <= pp->_maxy));
108
109	    for (y = 0; y <= wp->_maxy; y++) {
110		int left = wp->_line[y].firstchar;
111		if (left >= 0) {	/* line is touched */
112		    struct ldat *line = &(pp->_line[wp->_pary + y]);
113		    /* left & right character in parent window coordinates */
114		    int right = wp->_line[y].lastchar + wp->_parx;
115		    left += wp->_parx;
116
117		    CHANGED_RANGE(line, left, right);
118		}
119	    }
120	}
121}
122
123NCURSES_EXPORT(void)
124wsyncdown(WINDOW *win)
125/* mark changed every cell in win that is changed in any of its ancestors */
126/* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)           */
127{
128    if (win && win->_parent) {
129	WINDOW *pp = win->_parent;
130	int y;
131
132	/* This recursion guarantees, that the changes are propagated down-
133	   wards from the root to our direct parent. */
134	wsyncdown(pp);
135
136	/* and now we only have to propagate the changes from our direct
137	   parent, if there are any. */
138	assert((win->_pary <= pp->_maxy) &&
139	       ((win->_pary + win->_maxy) <= pp->_maxy));
140
141	for (y = 0; y <= win->_maxy; y++) {
142	    if (pp->_line[win->_pary + y].firstchar >= 0) {	/* parent changed */
143		struct ldat *line = &(win->_line[y]);
144		/* left and right character in child coordinates */
145		int left = pp->_line[win->_pary + y].firstchar - win->_parx;
146		int right = pp->_line[win->_pary + y].lastchar - win->_parx;
147		/* The change maybe outside the childs range */
148		if (left < 0)
149		    left = 0;
150		if (right > win->_maxx)
151		    right = win->_maxx;
152		CHANGED_RANGE(line, left, right);
153	    }
154	}
155    }
156}
157
158NCURSES_EXPORT(void)
159wcursyncup(WINDOW *win)
160/* sync the cursor in all derived windows to its value in the base window */
161{
162    WINDOW *wp;
163    for (wp = win; wp && wp->_parent; wp = wp->_parent) {
164	wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx);
165    }
166}
167
168NCURSES_EXPORT(WINDOW *)
169dupwin(WINDOW *win)
170/* make an exact duplicate of the given window */
171{
172    WINDOW *nwin;
173    size_t linesize;
174    int i;
175
176    T((T_CALLED("dupwin(%p)"), win));
177
178    if ((win == NULL) ||
179	((nwin = newwin(win->_maxy + 1, win->_maxx + 1, win->_begy,
180	 win->_begx)) == NULL))
181	returnWin(0);
182
183    nwin->_curx = win->_curx;
184    nwin->_cury = win->_cury;
185    nwin->_maxy = win->_maxy;
186    nwin->_maxx = win->_maxx;
187    nwin->_begy = win->_begy;
188    nwin->_begx = win->_begx;
189    nwin->_yoffset = win->_yoffset;
190
191    nwin->_flags = win->_flags & ~_SUBWIN;
192    /* Due to the use of newwin(), the clone is not a subwindow.
193     * The text is really copied into the clone.
194     */
195
196    nwin->_attrs = win->_attrs;
197    nwin->_bkgd = win->_bkgd;
198
199    nwin->_clear = win->_clear;
200    nwin->_scroll = win->_scroll;
201    nwin->_leaveok = win->_leaveok;
202    nwin->_use_keypad = win->_use_keypad;
203    nwin->_delay = win->_delay;
204    nwin->_immed = win->_immed;
205    nwin->_sync = win->_sync;
206
207    nwin->_parx = 0;
208    nwin->_pary = 0;
209    nwin->_parent = (WINDOW *) 0;
210    /* See above: the clone isn't a subwindow! */
211
212    nwin->_regtop = win->_regtop;
213    nwin->_regbottom = win->_regbottom;
214
215    linesize = (win->_maxx + 1) * sizeof(chtype);
216    for (i = 0; i <= nwin->_maxy; i++) {
217	memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
218	nwin->_line[i].firstchar = win->_line[i].firstchar;
219	nwin->_line[i].lastchar = win->_line[i].lastchar;
220    }
221
222    returnWin(nwin);
223}
224