xref: /xsrc/external/mit/libXi/dist/src/XSndExEv.c

/************************************************************

Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
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Except as contained in this notice, the name of The Open Group shall not be
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in this Software without prior written authorization from The Open Group.

Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.

			All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Hewlett-Packard not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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********************************************************/

/***********************************************************************
 *
 * XSendExtensionEvent - send an extension event to a client.
 *
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <X11/extensions/XI.h>
#include <X11/extensions/XIproto.h>
#include <X11/Xlibint.h>
#include <X11/extensions/XInput.h>
#include <X11/extensions/extutil.h>
#include "XIint.h"

/* Xlib's wire_vec is defined for a single event only, libXi may return
 * multiple events.
 */
typedef Status (*ext_event_to_wire)(Display*, XEvent*, xEvent**, int*);

Status
XSendExtensionEvent(
    register Display	*dpy,
    XDevice		*dev,
    Window		 dest,
    Bool		 prop,
    int			 count,
    XEventClass		*list,
    XEvent		*event)
{
    int num_events;
    int ev_size;
    xSendExtensionEventReq *req;
    xEvent *ev;
    ext_event_to_wire *fp;
    Status status;
    XExtDisplayInfo *info = XInput_find_display(dpy);

    LockDisplay(dpy);
    if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1)
	return (NoSuchExtension);

    /* call through display to find proper conversion routine */

    fp = (ext_event_to_wire*)&dpy->wire_vec[event->type & 0177];
    if (*fp == NULL)
	*fp = _XiEventToWire;
    status = (*fp) (dpy, event, &ev, &num_events);

    if (status) {
	GetReq(SendExtensionEvent, req);
	req->reqType = info->codes->major_opcode;
	req->ReqType = X_SendExtensionEvent;
	req->deviceid = dev->device_id;
	req->destination = dest;
	req->propagate = prop;
	req->count = count;
	req->num_events = num_events;
	ev_size = num_events * sizeof(xEvent);
	req->length += (count + (ev_size >> 2));

	/* note: Data is a macro that uses its arguments multiple
	 * times, so "count" is changed in a separate assignment
	 * statement.  Any extra events must be sent before the event
	 * list, in order to ensure quad alignment. */

	Data(dpy, (char *)ev, ev_size);

	count <<= 2;
	Data32(dpy, (long *)list, count);
	XFree((char *)ev);
    }

    UnlockDisplay(dpy);
    SyncHandle();
    return (status);
}