bug#57848: 29.0.50; Problems with private tab-line-tab-name-function

[Juri Linkov]

>> I tried to implement the window-local tab-line by using a window-parameter.
>> But the immediate drawback was that the keys 'C-x <left>' (previous-buffer)
>> and 'C-x <right>' (next-buffer) can't be used anymore to go to the
>> previous/next tab that is the same as the buffer in the window-buffers
>> list.
>
> Obviously I don't see why that happened without looking at what you did.
>
> Personally I don't like the idea of coupling the tab order with any
> existing buffer order.  Why do we need to do that in the general case?
> Isn't that calling for side effects?

By default the tab line displays tabs in the same order as buffers
in the window buffer list.  So switching to the next/previous buffer
with 'C-x left/right' also switches the tab in the same direction.

But then tabs don't correspond to the window buffers then there is
no key to switch to the next/previous tab.