GNU bug report logs - #79159
[PATCH] Do not display in the tab line tabs that are excluded.

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From: Elijah Gabe Pérez <eg642616 <at> gmail.com>
To: Juri Linkov <juri <at> linkov.net>
Cc: 79159 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: bug#79159: [PATCH] Do not display in the tab line tabs that are excluded.
Date: Fri, 08 Aug 2025 13:14:16 -0600

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Juri Linkov <juri <at> linkov.net> writes:

>>> 1. C-x b SPC *bar* RET
>>> 2. C-x b foo RET
>>> 3. C-x <left>
>>>
>>> It switches to the initial buffer *scratch*,
>>> skipping the excluded buffer " *bar*".
>>>
>>> Without the proposed patch the tab-line is broken,
>>> because it displays the excluded buffer,
>>> but 'C-x <left>' can't switch to it.
>>>
>>> So tab-line.el should follow the logic of window.el
>>> and omit excluded buffers as well.
>>
>> Yes, I've noticed this "bug", i have many buffers excluded, and when (for
>> some reason) they appear in my tab line (or I accidentally switch to
>> them), they are going to end up flooding my tab line, and it will be
>> hard to switch buffers via "C-x <left>|<right>".
>
> Do you mean that you customize not only 'tab-line-exclude-buffers',
> but also 'switch-to-prev-buffer-skip' and 'switch-to-prev-buffer-skip-regexp'
> to exclude the same buffers for both tab-line and "C-x <left>|<right>"?

No, i don't use 'switch-to-prev-buffer-skip' and
'switch-to-prev-buffer-skip-regexp' because they don't work in tab-line
(from what I've tested).

>>> Maybe the existing 'tab-line-tabs-buffer-list-function'
>>> should be promoted to the user option.
>>
>> I like the idea, but the problem is that
>> `tab-line-tabs-buffer-list-function' is used only for
>> `tab-line-tabs-mode-buffers' and `tab-line-tabs-buffer-groups'.
>>
>> Maybe the function should take an optional argument if it should list
>> only window buffers, so it can be used in
>> 'tab-line-tabs-fixed-window-buffers' and others.
>
> In fact it's needed only for 'tab-line-tabs-window-buffers'
> and 'tab-line-tabs-fixed-window-buffers', but not for other,
> because other such as 'tab-line-tabs-mode-buffers' and
> 'tab-line-tabs-buffer-groups' have own means to exclude buffers
> from the tab-line using 'tab-line-tabs-buffer-list-function'.
>
> So we could add a similar function e.g. 'tab-line-tabs-window-buffers-function'
> for 'tab-line-tabs-window-buffers' and 'tab-line-tabs-fixed-window-buffers'
> only.

Here is what I have done, I'm not sure of the result.

[0001-tab-line-hide-excluded-buffers-in-the-tab-line.-Bug-.patch (text/x-patch, attachment)]

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