bug#51173: 28.0.60; gnus-article-describe-key doesn't work

[Juri Linkov]

>> +         (defn (if (consp event)
>> +                   (save-excursion
>> +                     (mouse-set-point event) (key-binding key t))
>> +                 (key-binding key t))))
>>      ;; Handle the case where we faked an entry in "Select and Paste" menu.
>>      (when (and (eq defn nil)
>>             (stringp (aref key (1- (length key))))
>
> But this will still use "the wrong buffer" for mouse clicks, no?

It seems all mouse clicks expect the buffer where they were clicked
to be displayed in a window.  I can't imagine how a mouse click
could originate from a hidden buffer.

> BTW, maybe a cleaner fix would be as follows:
> - Add a `buffer` argument to `describe-key(-briefly)`.
> - Pass that argument from `gnus-article-describe-key`.
> And to get the behavior that Juri just pushed that `buffer` argument
> would default to (if (consp event) (window-buffer (posn-window
> (event-start event))) (current-buffere)).

I don't know.  All reported cases work now after Eli fixed
mouse-minibuffer-check not to raise an error when called from
mouse-set-point, so now it's safe to use it in help--analyze-key.