xorg-server-1.4/Xi/grabdev.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  * Extension function to grab 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/XI.h>
  64 #include <X11/extensions/XIproto.h>
  65 #include "extnsionst.h"
  66 #include "extinit.h"    /* LookupDeviceIntRec */
  67 #include "exglobals.h"
  68 #include "dixevents.h"  /* GrabDevice */
  69
  70 #include "grabdev.h"
  71
  72 extern XExtEventInfo EventInfo[];
  73 extern int ExtEventIndex;
  74
  75 /***********************************************************************
  76  *
  77  * Swap the request if the requestor has a different byte order than us.
  78  *
  79  */
  80
  81 int
  82 SProcXGrabDevice(ClientPtr client)
  83 {
  84     char n;
  85     long *p;
  86     int i;
  87
  88     REQUEST(xGrabDeviceReq);
  89     swaps(&stuff->length, n);
  90     REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
  91     swapl(&stuff->grabWindow, n);
  92     swapl(&stuff->time, n);
  93     swaps(&stuff->event_count, n);
  94     p = (long *)&stuff[1];
  95     for (i = 0; i < stuff->event_count; i++) {
  96         swapl(p, n);
  97         p++;
  98     }
  99
 100     return (ProcXGrabDevice(client));
 101 }
 102
 103 /***********************************************************************
 104  *
 105  * Grab an extension device.
 106  *
 107  */
 108
 109 int
 110 ProcXGrabDevice(ClientPtr client)
 111 {
 112     int error;
 113     xGrabDeviceReply rep;
 114     DeviceIntPtr dev;
 115     struct tmask tmp[EMASKSIZE];
 116
 117     REQUEST(xGrabDeviceReq);
 118     REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
 119
 120     if (stuff->length != (sizeof(xGrabDeviceReq) >> 2) + stuff->event_count) {
 121         SendErrorToClient(client, IReqCode, X_GrabDevice, 0, BadLength);
 122         return Success;
 123     }
 124
 125     rep.repType = X_Reply;
 126     rep.RepType = X_GrabDevice;
 127     rep.sequenceNumber = client->sequence;
 128     rep.length = 0;
 129
 130     dev = LookupDeviceIntRec(stuff->deviceid);
 131     if (dev == NULL) {
 132         SendErrorToClient(client, IReqCode, X_GrabDevice, 0, BadDevice);
 133         return Success;
 134     }
 135
 136     if (CreateMaskFromList(client, (XEventClass *) & stuff[1],
 137                            stuff->event_count, tmp, dev,
 138                            X_GrabDevice) != Success)
 139         return Success;
 140
 141     error = GrabDevice(client, dev, stuff->this_device_mode,
 142                        stuff->other_devices_mode, stuff->grabWindow,
 143                        stuff->ownerEvents, stuff->time,
 144                        tmp[stuff->deviceid].mask, &rep.status);
 145
 146     if (error != Success) {
 147         SendErrorToClient(client, IReqCode, X_GrabDevice, 0, error);
 148         return Success;
 149     }
 150     WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep);
 151     return Success;
 152 }
 153
 154 /***********************************************************************
 155  *
 156  * This procedure creates an event mask from a list of XEventClasses.
 157  *
 158  */
 159
 160 int
 161 CreateMaskFromList(ClientPtr client, XEventClass * list, int count,
 162                    struct tmask *mask, DeviceIntPtr dev, int req)
 163 {
 164     int i, j;
 165     int device;
 166     DeviceIntPtr tdev;
 167
 168     for (i = 0; i < EMASKSIZE; i++) {
 169         mask[i].mask = 0;
 170         mask[i].dev = NULL;
 171     }
 172
 173     for (i = 0; i < count; i++, list++) {
 174         device = *list >> 8;
 175         if (device > 255) {
 176             SendErrorToClient(client, IReqCode, req, 0, BadClass);
 177             return BadClass;
 178         }
 179         tdev = LookupDeviceIntRec(device);
 180         if (tdev == NULL || (dev != NULL && tdev != dev)) {
 181             SendErrorToClient(client, IReqCode, req, 0, BadClass);
 182             return BadClass;
 183         }
 184
 185         for (j = 0; j < ExtEventIndex; j++)
 186             if (EventInfo[j].type == (*list & 0xff)) {
 187                 mask[device].mask |= EventInfo[j].mask;
 188                 mask[device].dev = (Pointer) tdev;
 189                 break;
 190             }
 191     }
 192     return Success;
 193 }
 194
 195 /***********************************************************************
 196  *
 197  * This procedure writes the reply for the XGrabDevice function,
 198  * if the client and server have a different byte ordering.
 199  *
 200  */
 201
 202 void
 203 SRepXGrabDevice(ClientPtr client, int size, xGrabDeviceReply * rep)
 204 {
 205     char n;
 206
 207     swaps(&rep->sequenceNumber, n);
 208     swapl(&rep->length, n);
 209     WriteToClient(client, size, (char *)rep);
 210 }