IABSD.fr/xenocara/lib/libXi/src/XIGrabDevice.c

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• Author : matthieu
  Date : 2011-07-02 21:14:36
  Hash : d9324170
  Message : Update to libXi 1.4.2. Tested by ajacoutot@, jasper@, krw@, shadchin@. I believe that the bugs spotted by krw@ are fixed in an upcoming inputproto update.

• lib/libXi/src/XIGrabDevice.c

• /*
   * Copyright © 2009 Red Hat, Inc.
   *
   * 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.
   *
   */
  
  #include <stdint.h>
  #include <X11/Xlibint.h>
  #include <X11/extensions/XI2proto.h>
  #include <X11/extensions/XInput2.h>
  #include <X11/extensions/extutil.h>
  #include "XIint.h"
  
  
  Status
  XIGrabDevice(Display* dpy, int deviceid, Window grab_window, Time time,
               Cursor cursor, int grab_mode, int paired_device_mode,
               Bool owner_events, XIEventMask *mask)
  {
      xXIGrabDeviceReq *req;
      xXIGrabDeviceReply reply;
      char* buff;
      int len;
  
      XExtDisplayInfo *extinfo = XInput_find_display(dpy);
  
      LockDisplay(dpy);
      if (_XiCheckExtInit(dpy, XInput_2_0, extinfo) == -1)
  	return (NoSuchExtension);
  
      GetReq(XIGrabDevice, req);
      req->reqType  = extinfo->codes->major_opcode;
      req->ReqType  = X_XIGrabDevice;
      req->deviceid = deviceid;
      req->grab_window = grab_window;
      req->time = time;
      req->grab_mode = grab_mode;
      req->paired_device_mode = paired_device_mode;
      req->owner_events = owner_events;
      req->mask_len = (mask->mask_len + 3)/4;
      req->cursor = cursor;
  
  
      /* mask->mask_len is in bytes, but we need 4-byte units on the wire,
       * and they need to be padded with 0 */
      len = req->mask_len;
      buff = calloc(1, len * 4);
      memcpy(buff, mask->mask, mask->mask_len);
  
      SetReqLen(req, len, len);
      Data(dpy, buff, len * 4);
      free(buff);
  
      if (_XReply(dpy, (xReply *)&reply, 0, xTrue) == 0)
  	reply.status = GrabSuccess;
  
      UnlockDisplay(dpy);
      SyncHandle();
  
      return reply.status;
  }
  
  Status
  XIUngrabDevice(Display* dpy, int deviceid, Time time)
  {
      xXIUngrabDeviceReq *req;
  
      XExtDisplayInfo *info = XInput_find_display(dpy);
  
      LockDisplay(dpy);
      if (_XiCheckExtInit(dpy, XInput_2_0, info) == -1)
  	return (NoSuchExtension);
  
      GetReq(XIUngrabDevice, req);
      req->reqType = info->codes->major_opcode;
      req->ReqType = X_XIUngrabDevice;
  
      req->deviceid = deviceid;
      req->time = time;
  
      UnlockDisplay(dpy);
      SyncHandle();
      return (Success);
  }