xserver/Xi/xisetclientpointer.c

/*
 * Copyright 2007-2008 Peter Hutterer
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Author: Peter Hutterer, University of South Australia, NICTA
 */

/***********************************************************************
 *
 * Request to set the client pointer for the owner of the given window.
 * All subsequent calls that are ambiguous will choose the client pointer as
 * default value.
 */

#include <dix-config.h>

#include <X11/X.h>              /* for inputstr.h    */
#include <X11/Xproto.h>         /* Request macro     */
#include <X11/extensions/XI.h>
#include <X11/extensions/XI2proto.h>

#include "dix/dix_priv.h"
#include "dix/request_priv.h"
#include "Xi/handlers.h"

#include "inputstr.h"           /* DeviceIntPtr      */
#include "windowstr.h"          /* window structure  */
#include "scrnintstr.h"         /* screen structure  */
#include "extnsionst.h"
#include "exevents.h"
#include "exglobals.h"

int
ProcXISetClientPointer(ClientPtr client)
{
    X_REQUEST_HEAD_STRUCT(xXISetClientPointerReq);
    X_REQUEST_FIELD_CARD32(win);
    X_REQUEST_FIELD_CARD16(deviceid);

    DeviceIntPtr pDev;
    ClientPtr targetClient;
    int rc;

    rc = dixLookupDevice(&pDev, stuff->deviceid, client, DixManageAccess);
    if (rc != Success) {
        client->errorValue = stuff->deviceid;
        return rc;
    }

    if (!InputDevIsMaster(pDev)) {
        client->errorValue = stuff->deviceid;
        return BadDevice;
    }

    pDev = GetMaster(pDev, MASTER_POINTER);

    if (stuff->win != None) {
        rc = dixLookupResourceOwner(&targetClient, stuff->win, client,
                             DixManageAccess);

        if (rc != Success)
            return BadWindow;

    }
    else
        targetClient = client;

    rc = SetClientPointer(targetClient, pDev);
    if (rc != Success) {
        client->errorValue = stuff->deviceid;
        return rc;
    }

    return Success;
}