Nils Berg <nilsb@google.com> schrieb am Mo., 18. Apr. 2016 um 10:50 Uhr:

> I applied the patch, and the paste-on-click behavior is gone.
>
> However, if you try your original example again, you'll find that nothing
> happens at all, when we're expecting an "a" to be inserted.
> As the documentation of mouse-on-link-p says, a string or vector return
> value indicates the event to translate the original mouse-1 click into. In
> emacs24, that translation was done in mouse-drag-track:
> (let (on-link (and mouse-1-click-follows-link
>                        ;; Use start-point before the intangibility
>                        ;; treatment, in case we click on a link inside
>                        ;; intangible text.
>   (mouse-on-link-p start-posn)))
>   (if (or (vectorp on-link) (stringp on-link))
>  (setq event (aref on-link 0))
> (select-window original-window)
> (setcar event 'mouse-2)
> ;; If this mouse click has never been done by the
> ;; user, it doesn't have the necessary property to be
> ;; interpreted correctly.
> (put 'mouse-2 'event-kind 'mouse-click)))
>
> (abridged from mouse.el:791/901 in Emacs 24.3.1)
>
> I think mouse--down-1-maybe-follows-link should do something similar.
>

Agreed. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=17887 might also be
related.