xorg-server-1.4/Xi/ungrdev.c

   1 /************************************************************
   2
   3 Copyright 1989, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25 Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
  26
  27                         All Rights Reserved
  28
  29 Permission to use, copy, modify, and distribute this software and its
  30 documentation for any purpose and without fee is hereby granted,
  31 provided that the above copyright notice appear in all copies and that
  32 both that copyright notice and this permission notice appear in
  33 supporting documentation, and that the name of Hewlett-Packard not be
  34 used in advertising or publicity pertaining to distribution of the
  35 software without specific, written prior permission.
  36
  37 HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  39 HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43 SOFTWARE.
  44
  45 ********************************************************/
  46
  47 /***********************************************************************
  48  *
  49  * Request to release a grab of an extension device.
  50  *
  51  */
  52
  53 #define  NEED_EVENTS
  54 #define  NEED_REPLIES
  55 #ifdef HAVE_DIX_CONFIG_H
  56 #include <dix-config.h>
  57 #endif
  58
  59 #include <X11/X.h>      /* for inputstr.h    */
  60 #include <X11/Xproto.h> /* Request macro     */
  61 #include "inputstr.h"   /* DeviceIntPtr      */
  62 #include "windowstr.h"  /* window structure  */
  63 #include <X11/extensions/XIproto.h>
  64 #include "extnsionst.h"
  65 #include "extinit.h"    /* LookupDeviceIntRec */
  66 #include "exglobals.h"
  67
  68 #include "ungrdev.h"
  69
  70 /***********************************************************************
  71  *
  72  * Handle requests from a client with a different byte order.
  73  *
  74  */
  75
  76 int
  77 SProcXUngrabDevice(ClientPtr client)
  78 {
  79     char n;
  80
  81     REQUEST(xUngrabDeviceReq);
  82     swaps(&stuff->length, n);
  83     REQUEST_SIZE_MATCH(xUngrabDeviceReq);
  84     swapl(&stuff->time, n);
  85     return (ProcXUngrabDevice(client));
  86 }
  87
  88 /***********************************************************************
  89  *
  90  * Release a grab of an extension device.
  91  *
  92  */
  93
  94 int
  95 ProcXUngrabDevice(ClientPtr client)
  96 {
  97     DeviceIntPtr dev;
  98     GrabPtr grab;
  99     TimeStamp time;
 100
 101     REQUEST(xUngrabDeviceReq);
 102     REQUEST_SIZE_MATCH(xUngrabDeviceReq);
 103
 104     dev = LookupDeviceIntRec(stuff->deviceid);
 105     if (dev == NULL) {
 106         SendErrorToClient(client, IReqCode, X_UngrabDevice, 0, BadDevice);
 107         return Success;
 108     }
 109     grab = dev->grab;
 110
 111     time = ClientTimeToServerTime(stuff->time);
 112     if ((CompareTimeStamps(time, currentTime) != LATER) &&
 113         (CompareTimeStamps(time, dev->grabTime) != EARLIER) &&
 114         (grab) && SameClient(grab, client))
 115         (*dev->DeactivateGrab) (dev);
 116     return Success;
 117 }