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      1 /*
      2  * Copyright  2009 Red Hat, Inc.
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     21  * DEALINGS IN THE SOFTWARE.
     22  *
     23  */
     24 
     25 #if HAVE_CONFIG_H
     26 #include <config.h>
     27 #endif
     28 
     29 #include <stdint.h>
     30 #include <X11/Xlibint.h>
     31 #include <X11/extensions/XI2proto.h>
     32 #include <X11/extensions/XInput2.h>
     33 #include <X11/extensions/extutil.h>
     34 #include <limits.h>
     35 #include "XIint.h"
     36 
     37 
     38 Status
     39 XIGrabDevice(Display* dpy, int deviceid, Window grab_window, Time time,
     40              Cursor cursor, int grab_mode, int paired_device_mode,
     41              Bool owner_events, XIEventMask *mask)
     42 {
     43     xXIGrabDeviceReq *req;
     44     xXIGrabDeviceReply reply;
     45     char* buff;
     46     int len;
     47 
     48     XExtDisplayInfo *extinfo = XInput_find_display(dpy);
     49 
     50     LockDisplay(dpy);
     51     if (_XiCheckExtInit(dpy, XInput_2_0, extinfo) == -1)
     52 	return (NoSuchExtension);
     53 
     54     if (mask->mask_len > INT_MAX - 3 ||
     55         (mask->mask_len + 3)/4 >= 0xffff)
     56     {
     57         reply.status = BadValue;
     58         goto out;
     59     }
     60 
     61     /* mask->mask_len is in bytes, but we need 4-byte units on the wire,
     62      * and they need to be padded with 0 */
     63     len = (mask->mask_len + 3)/4;
     64     buff = calloc(4, len);
     65     if (!buff)
     66     {
     67         reply.status =  BadAlloc;
     68         goto out;
     69     }
     70 
     71     GetReq(XIGrabDevice, req);
     72     req->reqType  = extinfo->codes->major_opcode;
     73     req->ReqType  = X_XIGrabDevice;
     74     req->deviceid = deviceid;
     75     req->grab_window = grab_window;
     76     req->time = time;
     77     req->grab_mode = grab_mode;
     78     req->paired_device_mode = paired_device_mode;
     79     req->owner_events = owner_events;
     80     req->mask_len = len;
     81     req->cursor = cursor;
     82 
     83     memcpy(buff, mask->mask, mask->mask_len);
     84 
     85     SetReqLen(req, len, len);
     86     Data(dpy, buff, len * 4);
     87     free(buff);
     88 
     89     if (_XReply(dpy, (xReply *)&reply, 0, xTrue) == 0)
     90 	reply.status = GrabSuccess;
     91 
     92 out:
     93     UnlockDisplay(dpy);
     94     SyncHandle();
     95 
     96     return reply.status;
     97 }
     98 
     99 Status
    100 XIUngrabDevice(Display* dpy, int deviceid, Time time)
    101 {
    102     xXIUngrabDeviceReq *req;
    103 
    104     XExtDisplayInfo *info = XInput_find_display(dpy);
    105 
    106     LockDisplay(dpy);
    107     if (_XiCheckExtInit(dpy, XInput_2_0, info) == -1)
    108 	return (NoSuchExtension);
    109 
    110     GetReq(XIUngrabDevice, req);
    111     req->reqType = info->codes->major_opcode;
    112     req->ReqType = X_XIUngrabDevice;
    113 
    114     req->deviceid = deviceid;
    115     req->time = time;
    116 
    117     UnlockDisplay(dpy);
    118     SyncHandle();
    119     return (Success);
    120 }
    121 
    122 
    123