[Xcb] [RFC v0 proto] Add XInput2 protocol description

[Daniel Martin]

On Tue, Dec 04, 2012 at 08:08:10AM +1000, Peter Hutterer wrote:
> On Mon, Dec 03, 2012 at 10:05:37PM +0100, Daniel Martin wrote:
> > (In the following I'll write "XI2" when I mean the XInput extension
> > starting with version 2.0 and "XI" for the version up to 1.5.)
> > 
> > On Mon, Dec 03, 2012 at 09:56:26AM -0500, Peter Harris wrote:
> > > On 2012-12-02 16:05, Daniel Martin wrote:
> > > > Add the XInput2 protocol description for reviewing and feedback.
> > > 
> > > I haven't had time to review the meat of this, but this stuck out on an
> > > initial glance:
> > > 
> > > > +	xinput2.xml \
> > > 
> > > > +<xcb header="xinput2" extension-name="Input2"
> > > > +     extension-xname="XInputExtension" major-version="2" minor-version="2">
> > > 
> > > That's the same extension-xname as xinput.xml. I suspect the new
> > > definitions should be in xinput.xml, not in their own file.
> > 
> > I've choosen to make it in a seperate file, cause the extension name is
> > nearly the only thing both versions have in common and XI2 superseeds
> > the functionallity provided by XI.
> > 
> > Supporting both versions is not necessary as the XI specification
> > states:
> >     "... New clients are discouraged from using this protocol
> >          specification. Instead, the use of XI 2.x is recommended. ..."
> > 
> > Mixing both versions in one file would cause to much confusions on the
> > (library) user side, as he wouldn't know which request is for which
> > version without having a look at the specification.
> > 
> > Due to that, the fact that the protocol description for XI is not
> > complete and XI is disabled by default in libXCB, I would rather mark it
> > as deprecated when this XI2 protocol description becomes usable. But, I
> > wouldn't like to merge them.
> 
> you can't really deprecate XI1 yet, there's still quite a few clients using
> it,

I've meant deprecating XI1 in libxcb. There I thought it's not used that
much in the wild.

> and, more importantly, some information is not available in XI2.

Another thing where I "thought". Then we definitly can't deprecate XI1
in libxcb.