1
2 /*
3  * Copyright 1990, 1991 by OMRON Corporation
4  *
5  * Permission to use, copy, modify, distribute, and sell this software and its
6  * documentation for any purpose is hereby granted without fee, provided that
7  * the above copyright notice appear in all copies and that both that
8  * copyright notice and this permission notice appear in supporting
9  * documentation, and that the name OMRON not be used in
10  * advertising or publicity pertaining to distribution of the software without
11  * specific, written prior permission.  OMRON makes no representations
12  * about the suitability of this software for any purpose.  It is provided
13  * "as is" without express or implied warranty.
14  *
15  * OMRON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17  * EVENT SHALL OMRON BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20  * TORTUOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21  * PERFORMANCE OF THIS SOFTWARE.
22  *
23  *	Author:	Seiji Kuwari	OMRON Corporation
24  *				kuwa@omron.co.jp
25  *				kuwa%omron.co.jp@uunet.uu.net
26  */
27
28/*
29
30Copyright 1991, 1998  The Open Group
31
32Permission to use, copy, modify, distribute, and sell this software and its
33documentation for any purpose is hereby granted without fee, provided that
34the above copyright notice appear in all copies and that both that
35copyright notice and this permission notice appear in supporting
36documentation.
37
38The above copyright notice and this permission notice shall be included
39in all copies or substantial portions of the Software.
40
41THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
42OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
43MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
44IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
45OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
46ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
47OTHER DEALINGS IN THE SOFTWARE.
48
49Except as contained in this notice, the name of The Open Group shall
50not be used in advertising or otherwise to promote the sale, use or
51other dealings in this Software without prior written authorization
52from The Open Group.
53
54*/
55
56#ifdef HAVE_CONFIG_H
57#include <config.h>
58#else
59#define XLOCALE 1
60#endif
61#include "Xlibint.h"
62#if XLOCALE
63#include "Xlcint.h"
64#endif
65
66extern long const _Xevent_to_mask[];
67
68/*
69 * Look up if there is a specified filter for the event.
70 */
71Bool
72XFilterEvent(
73    XEvent *ev,
74    Window window)
75{
76#if XLOCALE
77    XFilterEventList	p;
78    Window		win;
79    long		mask;
80    Bool		ret;
81
82    if (window)
83	win = window;
84    else
85	win = ev->xany.window;
86    if (ev->type >= LASTEvent)
87	mask = 0;
88    else
89	mask = _Xevent_to_mask[ev->type];
90
91    LockDisplay(ev->xany.display);
92    for (p = ev->xany.display->im_filters; p != NULL; p = p->next) {
93	if (win == p->window) {
94	    if ((mask & p->event_mask) ||
95		(ev->type >= p->start_type && ev->type <= p->end_type)) {
96		UnlockDisplay(ev->xany.display);
97		ret = (*(p->filter))(ev->xany.display, p->window, ev,
98				      p->client_data);
99		return(ret);
100	    }
101	}
102    }
103    for (p = ev->xany.display->im_filters; p != NULL; p = p->next) {
104	/* Java sometimes calls XFilterEvent() with window=0 and ev come from
105	 * XNextEvent() when users type some keys quickly and switch multiple
106	 * input focuses in a Java window with the keys.
107	 * But XKeyEvent filters need to receive the event with window=0 for
108	 * _XimPendingFilter() and _XimUnfabricateSerial() to clear the
109	 * fowarded XKeyEvent with XIM_FORWARD_EVENT.
110	 *
111	 * The case of p->window == 0 is checkekd after all cases of p->window
112	 * != 0 are checked because all input contexts share
113	 * Display->im_filters but each input context has
114	 * Xic->private.proto.registed_filter_event for the filters
115	 * and same p->filter could be registerd to Display->im_filters twice
116	 * with different p->window.
117	 */
118	if (p->window == 0 && window == 0) {
119	    if ((mask & p->event_mask) ||
120		(ev->type >= p->start_type && ev->type <= p->end_type)) {
121		UnlockDisplay(ev->xany.display);
122		ret = (*(p->filter))(ev->xany.display, p->window, ev,
123				      p->client_data);
124		return(ret);
125	    }
126	}
127    }
128    UnlockDisplay(ev->xany.display);
129#endif
130    return(False);
131}
132