On Sunday, 30 January 2022 04:36:01 CET Ihor Radchenko wrote:
> chris <inkbottle007@gmail.com> writes:
> > 3- if you do `C-y` you can see the URL is in the kill-ring
> > But obviously there is no reason for this URL to be also in the Wayland
> > (or
> > x11) clipboard? (there is no law of nature saying that what is in emacs
> > kill- ring must necessarily also be in wayland clipboard. I think there
> > is a law of nature for the other way around though)
> > In any case, in the case of Kde/Kwin/Wayland, it is not copied in the
> > Wayland clipboard.
> > Maybe it's in the description of org-protocol/store-link that the URL
> > should be copied in emacs kill-ring, in any case, it is.
> > But no it doesn't show in the kde/wayland clipboard (and why would it).
> 
> I am not 100% sure if I understand your message clearly. However, just
> letting you know about existence of the following Emacs customisations:

It is, only, in conjunction with `org-protocol`, that kill-ring and Wayland-clipboard get out 
of sync.

Not in some general case. General case is fine.

But in the case of org-protocol, as described in the original post and not present in the 
excerpt you quoted, they do get out of sync.

To summarize again there are two things that are happening:

After doing `xdg-open "org-protocol://store-link?url=URL&title=TITLE"`.
The string "URL" is pushed into Emacs kill-ring.
But, this very string "URL", is not inserted into Wayland clipboard.

That was the first thing, string pushed into kill-ring, but not pushed simultaneously, into 
Wayland clipboard.

Now second thing: from that point onward, the other way around is broken. (And that is 
the part that is really annoying.)

[Then] I mouse-select a string in Firefox, or any application not Emacs. I verify the string is 
indeed in Wayland clipboard, I paste it in Firefox, or in the terminal (not Emacs).

Now I do `C-y`: this later string is not pasted, even though it should have been. I do `M-y` 
to see if I can find the string in the kill-ring: I can't find the string in the kill-ring.

What, instead, is the string at the top of Emacs kill-ring: the string "URL" (from the initial 
org-protocol action).

So Emacs has now stopped inserting strings from Wayland-clipboard into Emacs kill-ring.

No matter how hard I try.

The labor-intensive workaround:

Now what I do is copy a string inside Emacs using `C-w`.

Then, I verify if I can past it in Firefox: I can. It really is in Wayland clipboard.

Now I copy a string from Firefox into Emacs: it is not broken anymore, until the next time I 
use org-protocol, at which point it gets broken again.

And now it really is also present in Emacs kill-ring.

> save-interprogram-paste-before-kill:
>         Whether to save existing clipboard text into kill ring before
> replacing it. select-enable-primary:
>         Non-nil means cutting and pasting uses the primary selection.
> 
> Best,
> Ihor