Comment by eknkc
1 day ago
I thought wayland had some restrictions on global clipboard access and the last time I tried none of the well known clipboard managers worked as expected. (Also they all looked like shit).
This has been one of my pain points switching from macOS to linux or windows. Great job.
I actually went looking at the source code to see if this would work on Wayland and it doesn't. The clipboard snooping is implemented by listening for events using gdk.Clipboard, which is not an ext_data_control_v1 implementation. So on Wayland it'll only notice clipboard events if it's in focus (or if the compositor sends clipboard events to unfocused windows, which I'm not sure any do).
https://github.com/murat-cileli/clyp/blob/2c0ce6c33813c3f35f...
Edit: Yes, tested it now and it doesn't detect clipboard events from Wayland windows when it doesn't have focus. It only detects events from Xwayland windows when unfocused, or if I copy something from a Wayland window and then focus the clyp window then it detects the thing I copied.
It's almost as if a Wayland compositor should keep a list of trusted apps to broadcast clipboard events to, somehow similar to how screenshots are handled. (Not that Wayland is well-rounded in this regard.)
The ext_data_control_v1 protocol I mentioned is a protocol specifically for clipboard managers. So a client that wants to be a clipboard manager would implement that protocol. There are already implementations of it like wl-clipboard. There is no need for the compositor to broadcast regular clipboard events (wl_data_offer).
Now the compositor could certainly keep an additional list of trusted applications that are allowed to be clients of the ext_data_control_v1 protocol. Though identifying the client to enforce such a thing is a bigger problem than just maintaining a list of applications, because the protocol has no client identification. AFAIK every compositor that supports that protocol has no restrictions on clients requesting it, though something involving the security-context protocol might change this in the future.
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Odd, why does the readme tout "Full Wayland support" then?
Because its easy to write it and most wont even verify?
That's interesting.. Never ran into this, been using various clipboard managers in wayland (swaywm at first, now niri) for years without issue. copyq is what I use these days and, while not quite as pretty as this one, its great!