Re: [PATCH v4] docs: Activate exCJK only in CJK chapters

[Jonathan Corbet <corbet@lwn.net>]

Akira Yokosawa <akiyks@gmail.com> writes:

> Activating xeCJK in English and Italian-translation documents
> results in sub-optimal typesetting with wide-looking apostrophes
> and quotation marks.
>
> The xeCJK package provides macros for enabling and disabling its
> effect in the middle of a document, namely \makexeCJKactive and
> \makexeCJKinactive.
>
> So the goal of this change is to activate xeCJK in the relevant
> chapters in translations.
>
> To do this:
>
>     o Define custom macros in the preamble depending on the
>       availability of the "Noto Sans CJK" font so that those
>       macros can be used regardless of the use of xeCJK package.
>
>     o Patch \sphinxtableofcontents so that xeCJK is inactivated
>       after table of contents.
>
>     o Embed those custom macros in each language's index.rst file
>       as a ".. raw:: latex" construct.
>
> Note: A CJK chapter needs \kerneldocCJKon in front of its chapter
> heading, while a non-CJK chapter should have \kerneldocCJKoff
> below its chapter heading.
>
> This is to make sure the CJK font is available to CJK chapter's
> heading and ending page's footer.
>
> Tested against Sphinx versions 2.4.4 and 4.0.2.
>
> Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
> Tested-by: Wu XiangCheng <bobwxc@email.cn>
> Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Link: https://lore.kernel.org/lkml/2061da0a-6ab1-35f3-99c1-dbc415444f37@gmail.com

I've applied this, thanks.

jon