/* $XConsortium: xgrabdev.c,v 1.11 92/11/14 10:47:26 rws Exp $ */

/************************************************************
Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, California, and the 
Massachusetts Institute of Technology, Cambridge, Massachusetts.

			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 names of Hewlett-Packard or MIT 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
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

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

/***********************************************************************
 *
 * Extension function to grab an extension device.
 *
 */


#define	 NEED_EVENTS
#define	 NEED_REPLIES
#include "X.h"				/* for inputstr.h    */
#include "Xproto.h"			/* Request macro     */
#include "inputstr.h"			/* DeviceIntPtr	     */
#include "windowstr.h"			/* window structure  */
#include "XI.h"
#include "XIproto.h"

extern	int 		IReqCode;
extern	int		BadDevice;
extern	int		BadClass;
extern	XExtEventInfo	EventInfo[];
extern	void		(* ReplySwapVector[256]) ();
DeviceIntPtr		LookupDeviceIntRec();

/***********************************************************************
 *
 * Swap the request if the requestor has a different byte order than us.
 *
 */

int
SProcXGrabDevice(client)
    register ClientPtr client;
    {
    register char n;
    register long *p;
    register int i;

    REQUEST(xGrabDeviceReq);
    swaps(&stuff->length, n);
    REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
    swapl(&stuff->grabWindow, n);
    swapl(&stuff->time, n);
    swaps(&stuff->event_count, n);
    p = (long *) &stuff[1];
    for (i=0; i<stuff->event_count; i++)
        {
        swapl(p, n);
	p++;
        }

    return(ProcXGrabDevice(client));
    }

/***********************************************************************
 *
 * Grab an extension device.
 *
 */

int
ProcXGrabDevice(client)
    ClientPtr client;
    {
    int			error;
    xGrabDeviceReply 	rep;
    DeviceIntPtr 	dev;
    struct tmask	tmp[EMASKSIZE];

    REQUEST(xGrabDeviceReq);
    REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);

    if (stuff->length !=(sizeof(xGrabDeviceReq)>>2) + stuff->event_count)
	{
	SendErrorToClient (client, IReqCode, X_GrabDevice, 0, BadLength);
	return Success;
	}

    rep.repType = X_Reply;
    rep.RepType = X_GrabDevice;
    rep.sequenceNumber = client->sequence;
    rep.length = 0;

    dev = LookupDeviceIntRec (stuff->deviceid);
    if (dev == NULL)
	{
	SendErrorToClient(client, IReqCode, X_GrabDevice, 0, BadDevice);
	return Success;
	}

    if (CreateMaskFromList (client, (XEventClass *)&stuff[1], 
	stuff->event_count, tmp, dev, X_GrabDevice) != Success)
	return Success;

    error = GrabDevice (client, dev, stuff->this_device_mode, 
	stuff->other_devices_mode, stuff->grabWindow, stuff->ownerEvents, 
	stuff->time, tmp[stuff->deviceid].mask, &rep.status);

    if (error != Success)
	{
	SendErrorToClient(client, IReqCode, X_GrabDevice, 0, error);
	return Success;
	}
    WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep);
    return Success;
    }


/***********************************************************************
 *
 * This procedure creates an event mask from a list of XEventClasses.
 *
 */

int
CreateMaskFromList (client, list, count, mask, dev, req)
    ClientPtr		client;
    XEventClass		*list;
    int			count;
    struct tmask	mask[];
    DeviceIntPtr	dev;
    int			req;
    {
    int			i,j;
    int			device;
    DeviceIntPtr	tdev;
    extern int		ExtEventIndex;

    for (i=0; i<EMASKSIZE; i++)
	{
	mask[i].mask = 0;
	mask[i].dev = NULL;
	}

    for (i=0; i<count; i++, list++)
	{
	device = *list >> 8;
	tdev = LookupDeviceIntRec (device);
	if (tdev==NULL || (dev != NULL && tdev != dev))
	    {
	    SendErrorToClient(client, IReqCode, req, 0, BadClass);
	    return BadClass;
	    }

	for (j=0; j<ExtEventIndex; j++)
	    if (EventInfo[j].type == (*list & 0xff))
		{
		mask[device].mask |= EventInfo[j].mask;
		mask[device].dev = (Pointer) tdev;
		break;
		}
	}
    return Success;
    }

/***********************************************************************
 *
 * This procedure writes the reply for the XGrabDevice function,
 * if the client and server have a different byte ordering.
 *
 */

SRepXGrabDevice (client, size, rep)
    ClientPtr	client;
    int		size;
    xGrabDeviceReply	*rep;
    {
    register char n;

    swaps(&rep->sequenceNumber, n);
    swapl(&rep->length, n);
    WriteToClient(client, size, rep);
    }