[PATCH] Don't release passive grabs unless all buttons are up

[Thomas Jaeger]

I've been looking at the other places where buttonsDown is used.  In
CheckDeviceGrabs, I think we also want logical state, not physical
state.  I'm not sure what's up with motionMask, but since it's related
to event handling and events should also see logical state, I think it
would make more sense for buttonsDown to count the number of buttons
that are down and aren't mapped to 0.  I hope I'm not way off.

Thanks,
Tom

Thomas Jaeger wrote:
> This turned out to be a little bit trickier than I initially thought,
> since buttonsDown counts the number of physical buttons that are down,
> before they are mapped to logical buttons.
> 
> The thing I'm unsure about (as should be evident from the patch), is
> where to stick the declaration for the new function AllButtonsAreUp.
> 
> Thanks,
> Tom
> 
> Thomas Jaeger wrote:
>> I can't see any reason why we would treat buttons > 5 differently.  This
>> patch simplifies client code by eliminating the need to call XGrabDevice
>> after a button has been pressed and prevents race conditions that could
>> result from that.
>>
>> Tom
> 
>