bug#28658: 27.0.50; [PATCH] double/triple clicking in xterm-mouse-mode doesn't respect mouse position

[Alex <agrambot@gmail.com>]

Eli Zaretskii <eliz@gnu.org> writes:


>> It would be nice if it worked with pixel positions rather than
>> character positions, but I'm not sure how to do that in a terminal
>> Emacs.
>
> You can't: TTY frames cannot discern screen positions with resolution
> of more than 1 character.
>
>> @@ -290,12 +292,14 @@ xterm-mouse-event
>>                (xterm-mouse--set-click-count event click-count)))
>>             ((not last-time) nil)
>>             ((and (> double-click-time (* 1000 (- this-time last-time)))
>> +                 (eq x last-x)
>> +                 (eq y last-y)
>
> IMO, 'eq' is not right here: this test should obey the value of
> double-click-fuzz, whose units on TTY frames are 1/8 of a character.

I don't understand how to use double-click-fuzz in TTY frames. You said
that TTY frames can't discern screen position differences of less than a
character, so then why are the units 1/8th of a character?

Is there a way to get the mouse coordinate position in 1/8ths of a
character to use double-click-fuzz?