1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 1985, 1987, 1998 The Open Group
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission to use, copy, modify, distribute, and sell this software and its
5*4882a593Smuzhiyun * documentation for any purpose is hereby granted without fee, provided that
6*4882a593Smuzhiyun * the above copyright notice appear in all copies and that both that
7*4882a593Smuzhiyun * copyright notice and this permission notice appear in supporting
8*4882a593Smuzhiyun * documentation.
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in
11*4882a593Smuzhiyun * all copies or substantial portions of the Software.
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16*4882a593Smuzhiyun * OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
17*4882a593Smuzhiyun * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
18*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * Except as contained in this notice, the name of The Open Group shall not be
21*4882a593Smuzhiyun * used in advertising or otherwise to promote the sale, use or other dealings
22*4882a593Smuzhiyun * in this Software without prior written authorization from The Open Group.
23*4882a593Smuzhiyun */
24*4882a593Smuzhiyun /* $XFree86 */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /*
27*4882a593Smuzhiyun * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
28*4882a593Smuzhiyun *
29*4882a593Smuzhiyun * All Rights Reserved.
30*4882a593Smuzhiyun *
31*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining
32*4882a593Smuzhiyun * a copy of this software and associated documentation files (the
33*4882a593Smuzhiyun * "Software"), to deal in the Software without restriction, including
34*4882a593Smuzhiyun * without limitation on the rights to use, copy, modify, merge,
35*4882a593Smuzhiyun * publish, distribute, sublicense, and/or sell copies of the Software,
36*4882a593Smuzhiyun * and to permit persons to whom the Software is furnished to do so,
37*4882a593Smuzhiyun * subject to the following conditions:
38*4882a593Smuzhiyun *
39*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the
40*4882a593Smuzhiyun * next paragraph) shall be included in all copies or substantial
41*4882a593Smuzhiyun * portions of the Software.
42*4882a593Smuzhiyun *
43*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
44*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
45*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
46*4882a593Smuzhiyun * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
47*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
48*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
49*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
50*4882a593Smuzhiyun * SOFTWARE.
51*4882a593Smuzhiyun */
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun /** \file
54*4882a593Smuzhiyun * This file provides a #XCheckNotMaskEvent function that is derived
55*4882a593Smuzhiyun * from the standard Xlib XCheckMaskEvent function. */
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #ifdef HAVE_DMX_CONFIG_H
58*4882a593Smuzhiyun #include <dmx-config.h>
59*4882a593Smuzhiyun #endif
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun #include "dmx.h"
62*4882a593Smuzhiyun #include "ChkNotMaskEv.h"
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun extern long const _Xevent_to_mask[];
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun /** Check existing events in queue to find if any match. If so, return.
67*4882a593Smuzhiyun * If not, flush buffer and see if any more events are readable. If one
68*4882a593Smuzhiyun * matches, return. If all else fails, tell the user no events found.
69*4882a593Smuzhiyun */
70*4882a593Smuzhiyun Bool
XCheckNotMaskEvent(Display * dpy,long mask,XEvent * event)71*4882a593Smuzhiyun XCheckNotMaskEvent(Display * dpy, long mask, XEvent * event)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun register _XQEvent *prev, *qelt;
74*4882a593Smuzhiyun unsigned long qe_serial = 0;
75*4882a593Smuzhiyun int n; /* time through count */
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun LockDisplay(dpy);
78*4882a593Smuzhiyun prev = NULL;
79*4882a593Smuzhiyun for (n = 3; --n >= 0;) {
80*4882a593Smuzhiyun for (qelt = prev ? prev->next : dpy->head;
81*4882a593Smuzhiyun qelt; prev = qelt, qelt = qelt->next) {
82*4882a593Smuzhiyun if (qelt->event.type >= LASTEvent
83*4882a593Smuzhiyun || !(_Xevent_to_mask[qelt->event.type] & mask)) {
84*4882a593Smuzhiyun *event = qelt->event;
85*4882a593Smuzhiyun _XDeq(dpy, prev, qelt);
86*4882a593Smuzhiyun UnlockDisplay(dpy);
87*4882a593Smuzhiyun return True;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun if (prev)
91*4882a593Smuzhiyun qe_serial = prev->qserial_num;
92*4882a593Smuzhiyun switch (n) {
93*4882a593Smuzhiyun case 2:
94*4882a593Smuzhiyun _XEventsQueued(dpy, QueuedAfterReading);
95*4882a593Smuzhiyun break;
96*4882a593Smuzhiyun case 1:
97*4882a593Smuzhiyun _XFlush(dpy);
98*4882a593Smuzhiyun break;
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun if (prev && prev->qserial_num != qe_serial)
101*4882a593Smuzhiyun /* another thread has snatched this event */
102*4882a593Smuzhiyun prev = NULL;
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun UnlockDisplay(dpy);
105*4882a593Smuzhiyun return False;
106*4882a593Smuzhiyun }
107