Juri Linkov <juri@linkov.net> writes:

> The only drawback of #2 is that when the user wants to completely
> override all default faces, then calculating the default faces
> is unnecessary, but its performance overhead is negligible.
>
> For more optimization we could try also to add more args to the
> face-returning functions, such args as 'selected-p', but OTOH, maybe
> 'selected-p' is not needed in tab-line-tab-face-inactive-alternating,
> because it can just check if the arg 'face' from the previous function is
> not 'tab-line-tab-current'.

Ok, I went with option 2, which moves the default-face code from the
-tab-face-default function back into the -format-template function.

Then I added buffer-p and selected-p arguments to the modifier functions
as optimizations.

This patch also includes changes for the face-related issues Eli
mentioned, and it renames the -modifiers option to -functions, as you
suggested.

Please let me know what other changes are required.  Also, if I should
write a NEWS entry, let me know and I'll add one.

Thanks.