Blame src/RegstFlt.c

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 /*
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  * Copyright 1990, 1991 by OMRON Corporation
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  *
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  * Permission to use, copy, modify, distribute, and sell this software and its
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  * documentation for any purpose is hereby granted without fee, provided that
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  * the above copyright notice appear in all copies and that both that
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  * copyright notice and this permission notice appear in supporting
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  * documentation, and that the name OMRON not be used in
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  * advertising or publicity pertaining to distribution of the software without
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  * specific, written prior permission.  OMRON makes no representations
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  * about the suitability of this software for any purpose.  It is provided
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  * "as is" without express or implied warranty.
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  *
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  * OMRON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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  * EVENT SHALL OMRON BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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  * TORTUOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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  * PERFORMANCE OF THIS SOFTWARE.
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  *
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  *	Author:	Seiji Kuwari	OMRON Corporation
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  *				kuwa@omron.co.jp
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  *				kuwa%omron.co.jp@uunet.uu.net
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  */
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/*
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Copyright 1990, 1991, 1998  The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from The Open Group.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "Xlibint.h"
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#include "Xlcint.h"
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static void
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_XFreeIMFilters(
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    Display *display)
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{
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    register XFilterEventList fl;
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    while ((fl = display->im_filters)) {
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        display->im_filters = fl->next;
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        Xfree(fl);
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    }
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}
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/*
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 * Register a filter with the filter machinery by event mask.
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 */
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void
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_XRegisterFilterByMask(
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    Display *display,
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    Window window,
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    unsigned long event_mask,
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    Bool (*filter)(
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		   Display*, Window, XEvent*, XPointer
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		   ),
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    XPointer client_data)
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{
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    XFilterEventRec		*rec;
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    rec = Xmalloc(sizeof(XFilterEventRec));
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    if (!rec)
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	return;
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    rec->window = window;
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    rec->event_mask = event_mask;
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    rec->start_type = 0;
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    rec->end_type = 0;
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    rec->filter = filter;
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    rec->client_data = client_data;
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    LockDisplay(display);
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    rec->next = display->im_filters;
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    display->im_filters = rec;
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    display->free_funcs->im_filters = _XFreeIMFilters;
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    UnlockDisplay(display);
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}
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/*
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 * Register a filter with the filter machinery by type code.
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 */
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void
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_XRegisterFilterByType(
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    Display *display,
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    Window window,
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    int start_type,
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    int end_type,
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    Bool (*filter)(
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		   Display*, Window, XEvent*, XPointer
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		   ),
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    XPointer client_data)
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{
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    XFilterEventRec		*rec;
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    rec = Xmalloc(sizeof(XFilterEventRec));
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    if (!rec)
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	return;
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    rec->window = window;
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    rec->event_mask = 0;
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    rec->start_type = start_type;
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    rec->end_type = end_type;
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    rec->filter = filter;
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    rec->client_data = client_data;
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    LockDisplay(display);
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    rec->next = display->im_filters;
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    display->im_filters = rec;
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    display->free_funcs->im_filters = _XFreeIMFilters;
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    UnlockDisplay(display);
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}
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void
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_XUnregisterFilter(
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    Display *display,
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    Window window,
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    Bool (*filter)(
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		   Display*, Window, XEvent*, XPointer
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		   ),
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    XPointer client_data)
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{
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    register XFilterEventList	*prev, fl;
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    for (prev = &display->im_filters; (fl = *prev); ) {
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	if (fl->window == window &&
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	    fl->filter == filter && fl->client_data == client_data) {
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	    *prev = fl->next;
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	    Xfree(fl);
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	} else
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	    prev = &fl->next;
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    }
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}