int
ProcXIGrabDevice(ClientPtr client)
{
DeviceIntPtr dev;
xXIGrabDeviceReply rep;
int ret = Success;
uint8_t status;
GrabMask mask;
int mask_len;
REQUEST(xXIGrabDeviceReq);
REQUEST_AT_LEAST_SIZE(xXIGrabDeviceReq);
ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
if (ret != Success)
return ret;
if (!IsMaster(dev))
stuff->paired_device_mode = GrabModeAsync;
if (XICheckInvalidMaskBits((unsigned char*)&stuff[1],
stuff->mask_len * 4) != Success)
return BadValue;
mask_len = min(sizeof(mask.xi2mask[stuff->deviceid]), stuff->mask_len * 4);
memset(mask.xi2mask, 0, sizeof(mask.xi2mask));
memcpy(mask.xi2mask, (char*)&stuff[1], mask_len);
ret = GrabDevice(client, dev, stuff->grab_mode,
stuff->paired_device_mode,
stuff->grab_window,
stuff->owner_events,
stuff->time,
&mask,
GRABTYPE_XI2,
stuff->cursor,
None /* confineTo */,
&status);
if (ret != Success)
return ret;
rep.repType = X_Reply;
rep.RepType = X_XIGrabDevice;
rep.length = 0;
rep.sequenceNumber = client->sequence;
rep.status = status;
WriteReplyToClient(client, sizeof(rep), &rep);
return ret;
}
/*
* Active grab of keyboard. clear any client side grabs so we dont lock
*/
int XtGrabKeyboard (
Widget widget,
_XtBoolean owner_events,
int pointer_mode,
int keyboard_mode,
Time time)
{
int retval;
WIDGET_TO_APPCON(widget);
LOCK_APP(app);
retval = GrabDevice (widget, owner_events,
pointer_mode, keyboard_mode,
(Mask)0, (Window)None, (Cursor)None, time, KEYBOARD);
UNLOCK_APP(app);
return retval;
}
/*
* grab the pointer
*/
int XtGrabPointer (
Widget widget,
_XtBoolean owner_events,
unsigned int event_mask,
int pointer_mode,
int keyboard_mode,
Window confine_to,
Cursor cursor,
Time time)
{
int retval;
WIDGET_TO_APPCON(widget);
LOCK_APP(app);
retval = GrabDevice (widget, owner_events,
pointer_mode, keyboard_mode,
(Mask)event_mask, confine_to,
cursor, time, POINTER);
UNLOCK_APP(app);
return retval;
}
int
ProcXIGrabDevice(ClientPtr client)
{
DeviceIntPtr dev;
xXIGrabDeviceReply rep;
int ret = Success;
uint8_t status;
GrabMask mask = { 0 };
int mask_len;
REQUEST(xXIGrabDeviceReq);
REQUEST_AT_LEAST_SIZE(xXIGrabDeviceReq);
ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
if (ret != Success)
return ret;
if (!IsMaster(dev))
stuff->paired_device_mode = GrabModeAsync;
if (XICheckInvalidMaskBits(client, (unsigned char *) &stuff[1],
stuff->mask_len * 4) != Success)
return BadValue;
mask.xi2mask = xi2mask_new();
if (!mask.xi2mask)
return BadAlloc;
mask_len = min(xi2mask_mask_size(mask.xi2mask), stuff->mask_len * 4);
/* FIXME: I think the old code was broken here */
xi2mask_set_one_mask(mask.xi2mask, dev->id, (unsigned char *) &stuff[1],
mask_len);
ret = GrabDevice(client, dev, stuff->grab_mode,
stuff->paired_device_mode,
stuff->grab_window,
stuff->owner_events,
stuff->time,
&mask, XI2, stuff->cursor, None /* confineTo */ ,
&status);
xi2mask_free(&mask.xi2mask);
if (ret != Success)
return ret;
rep = (xXIGrabDeviceReply) {
.repType = X_Reply,
.RepType = X_XIGrabDevice,
.sequenceNumber = client->sequence,
.length = 0,
.status = status
};
WriteReplyToClient(client, sizeof(rep), &rep);
return ret;
}
int
SProcXIUngrabDevice(ClientPtr client)
{
REQUEST(xXIUngrabDeviceReq);
swaps(&stuff->length);
swaps(&stuff->deviceid);
swapl(&stuff->time);
return ProcXIUngrabDevice(client);
}
int
ProcXGrabDevice(ClientPtr client)
{
int rc;
xGrabDeviceReply rep;
DeviceIntPtr dev;
GrabMask mask;
struct tmask tmp[EMASKSIZE];
REQUEST(xGrabDeviceReq);
REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
if (stuff->length !=
bytes_to_int32(sizeof(xGrabDeviceReq)) + stuff->event_count)
return BadLength;
rep = (xGrabDeviceReply) {
.repType = X_Reply,
.RepType = X_GrabDevice,
.sequenceNumber = client->sequence,
.length = 0,
};
rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
if (rc != Success)
return rc;
if ((rc = CreateMaskFromList(client, (XEventClass *) &stuff[1],
stuff->event_count, tmp, dev,
X_GrabDevice)) != Success)
return rc;
mask.xi = tmp[stuff->deviceid].mask;
rc = GrabDevice(client, dev, stuff->other_devices_mode,
stuff->this_device_mode, stuff->grabWindow,
stuff->ownerEvents, stuff->time,
&mask, XI, None, None, &rep.status);
if (rc != Success)
return rc;
WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep);
return Success;
}
/***********************************************************************
*
* This procedure creates an event mask from a list of XEventClasses.
*
* Procedure is as follows:
* An XEventClass is (deviceid << 8 | eventtype). For each entry in the list,
* get the device. Then run through all available event indices (those are
* set when XI starts up) and binary OR's the device's mask to whatever the
* event mask for the given event type was.
* If an error occurs, it is sent to the client. Errors are generated if
* - if the device given in the event classs is invalid
* - if the device in the class list is not the device given as parameter (no
* error if parameter is NULL)
*
* mask has to be size EMASKSIZE and pre-allocated.
*
* @param client The client to send the error to (if one occurs)
* @param list List of event classes as sent from the client.
* @param count Number of elements in list.
* @param mask Preallocated mask (size EMASKSIZE).
* @param dev The device we're creating masks for.
* @param req The request we're processing. Used to fill in error fields.
*/
int
CreateMaskFromList(ClientPtr client, XEventClass * list, int count,
struct tmask *mask, DeviceIntPtr dev, int req)
{
int rc, i, j;
int device;
DeviceIntPtr tdev;
memset(mask, 0, EMASKSIZE * sizeof(struct tmask));
for (i = 0; i < count; i++, list++) {
device = *list >> 8;
if (device > 255)
return BadClass;
rc = dixLookupDevice(&tdev, device, client, DixUseAccess);
if (rc != BadDevice && rc != Success)
return rc;
if (rc == BadDevice || (dev != NULL && tdev != dev))
return BadClass;
for (j = 0; j < ExtEventIndex; j++)
if (EventInfo[j].type == (*list & 0xff)) {
mask[device].mask |= EventInfo[j].mask;
mask[device].dev = (Pointer) tdev;
break;
}
}
return Success;
}
