Eli Zaretskii <eliz@gnu.org> writes:

>> From: Elijah Gabe Pérez <eg642616@gmail.com>
>> Date: Sat, 02 Aug 2025 14:00:27 -0600
>> 
>> tab-line by default displays all the tabs in the tab line, however
>> this
>> also includes the tab that are excluded in 'tab-line-exclude-modes'
>> and
>> 'tab-line-exclude-buffers', which IMO makes no sense.
>
> I think "makes no sense" is in the eyes of the beholder.  These
> variables determine which buffers should have the tab-line shown in
> their windows, they don't mean these buffers should not be reachable
> via the tab-line in other buffers.  Hiding them in all tab-lines means
> you cannot switch to those buffers except via "C-x b" or somesuch.
> That is not the intent of these variables, AFAIU.  Their intent is to
> disable tab-line in buffers where showing the tab-line makes no sense.
> The default value of tab-line-exclude-modes is a good example of that.

Of course, but the variable names can be confusing, some users familiar
with other tab-line-like packages might expect this feature.  This may
also depend on the users workflow; some may prefer to use the tab-line
to display only relevant tabs and search for the rest with "C-x b".

> But I won't object to adding a knob to have the behavior you want, if
> Juri agrees, and there are no other objections.  However, this must be
> an opt-in behavior, by default off.

Fine, I've added it as an option.

>> Currently, it only works for 'tab-line-tabs-fixed-window-buffers'.
>
> Which IMO is a limitation that should be lifted, for this feature to
> make sense.  I expect to see bug reports if we don't.

I've added it to the other relevant functions.

>> +*** 'tab-line-tabs-fixed-window-buffers' now hides the excluded
>> tabs.
>> +All the buffers included in 'tab-line-exclude-buffers' and
>> +'tab-line-exclude-modes' will not appear in the tab line only if
>> +'tab-line-tabs-function' is set to
>> 'tab-line-tabs-fixed-window-buffers'.
>
> A buffer cannot be "included" in a list of modes, so talking about a
> buffer included in tab-line-exclude-modes is confusing.  I suggest to
> reword:
>
>   *** Excluded buffers are no longer shown in tab-lines of other buffers.
>   Buffers that match 'tab-line-exclude-buffers' and buffers whose
>   modes are in 'tab-line-exclude-modes' will not appear in tab-lines
>   of other buffers.

> Also, why isn't there either "+++" (and a suitable change to the
> manual) or "---" for this entry?  We don't want to defer the decision
> whether and how to document the changes in the manuals to the time
> when a release will be prepared, we want to make the necessary
> documentation changes right away.  So let's please decide now whether
> this change deserves to be mentioned in the manuals, and act
> accordingly.

I forgot it, but i don't think this needs to be added to the manual,
mostly because none of the NEWS entries in "Tab Bars and Tab Lines" are
in the manual.