[RFC wayland-protocols 1/1] Add Primary Selection Protocol Version 1

[Pekka Paalanen]

On Mon, 14 Dec 2015 10:45:25 -0800
Bill Spitzak <spitzak at gmail.com> wrote:

> On Mon, Dec 14, 2015 at 9:13 AM, Pekka Paalanen <ppaalanen at gmail.com> wrote:
> 
> > On Mon, 14 Dec 2015 10:39:05 -0500
> > Lyude <cpaul at redhat.com> wrote:
> >
> > > On Sat, 2015-12-12 at 11:29 -0800, Bill Spitzak wrote:
> > > > I don't think you need the word "primary" in there. It can be called
> > the
> > > > selection. The other thing this is confused with is called the
> > "clipboard".
> > > >
> > > > Glad to see you reusing the dnd protocol. X selection and
> > middle-button paste
> > > > is really a form of DnD, but with the advantage that the user can
> > rearrage and
> > > > open and close windows between when they start and finish the drag.
> > > Alright I'm a bit confused here since I'm getting conflicting opinions
> > on this.
> > > Should we be reusing the dnd protocol or not? Giulio seems to think we
> > shouldn't
> > > be reusing the data offer objects here, but I would have thought that
> > makes the
> > > most sense here seeing as the functionality of a
> > wp_primary_(offer|source) would
> > > be pretty much identical to the wl_data_(offer|source) objects.
> >
> > Giulio is right.
> >
> > You must not break the versioning (hierarchy) of protocol objects.
> > See:
> > http://wayland.freedesktop.org/docs/html/ch04.html#sect-Protocol-Versioning
> >
> > Having two different global interfaces that (or their child
> > interfaces, i.e. the interfaces of objects that can be created from
> > these) can create objects with the same interface will not allow
> > that interface to be extended, because the interface version becomes
> > ambiguous.
> >
> > Examples of interfaces that are already impossible to extend are
> > wl_buffer and wl_callback. For wl_buffer there is a good reason to
> > break the rule and take the hit of being stuck at version 1
> > forever, but I think it was more of an accident than intentional
> > design originally.
> >
> 
> He is not creating the DnD objects with the new api, just reusing them.

<arg name="offer" type="new_id" interface="wl_data_offer"  

So what do you think that does if not create objects of type
wl_data_offer?


Thanks,
pq
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