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Subject: [PATCH v4 2/9] docs: pdfdocs: Add CJK-language-specific font settings
To:     Jonathan Corbet <corbet@lwn.net>
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        "Wu X.C." <bobwxc@email.cn>, SeongJae Park <sj38.park@gmail.com>,
        Hu Haowen <src.res@email.cn>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, Akira Yokosawa <akiyks@gmail.com>
References: <39d0fb0f-b248-bca4-2dac-df69e8d697b1@gmail.com>
From:   Akira Yokosawa <akiyks@gmail.com>
Message-ID: <31906baf-7490-68cd-7153-4e4d320fb9b0@gmail.com>
Date:   Mon, 9 Aug 2021 10:14:53 +0900
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zh_TW, ko_KR, and ja_JP translations have their preferred glyph sets
different from that of zh_CN.

To switch CJK font in the middle of the translations, introduce custom
LaTeX macros listed below:

    \kerneldocBeginSC
    \kerneldocEndSC
    \kerneldocBeginTC
    \kerneldocEndTC
    \kerneldocBeginKR
    \kerneldocEndKR
    \kerneldocBeginJP
    \kerneldocEndJP

, and embed a pair of macros in each language's index.rst.

NOTE 1: Update of zh_TW/index.rst is deferred to a follow-up change.

NOTE 2: Custom macros added here do not imply \kerneldocCJK(on|off).
This is intentional.  For example, \kerneldocCJKoff needs to be
at the top of Italian translations' index.rst for the footer of
final zh_TW page to be properly typeset.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
---
 Documentation/conf.py                      | 51 +++++++++++++++++++++-
 Documentation/translations/ja_JP/index.rst |  5 +++
 Documentation/translations/ko_KR/index.rst |  2 +
 Documentation/translations/zh_CN/index.rst |  5 +++
 4 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/Documentation/conf.py b/Documentation/conf.py
index b440cb606d22..24e5427588e7 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -361,10 +361,51 @@ latex_elements['preamble']  +=3D '''
 	% This is needed for translations
 	\\usepackage{xeCJK}
 	\\setCJKmainfont{Noto Sans CJK SC}
+	\\setCJKsansfont{Noto Sans CJK SC}
+	\\setCJKmonofont{Noto Sans Mono CJK SC}
+	% CJK Language-specific font choices
+	\\newCJKfontfamily[SCmain]\\scmain{Noto Sans CJK SC}
+	\\newCJKfontfamily[SCsans]\\scsans{Noto Sans CJK SC}
+	\\newCJKfontfamily[SCmono]\\scmono{Noto Sans Mono CJK SC}
+	\\newCJKfontfamily[TCmain]\\tcmain{Noto Sans CJK TC}
+	\\newCJKfontfamily[TCsans]\\tcsans{Noto Sans CJK TC}
+	\\newCJKfontfamily[TCmono]\\tcmono{Noto Sans Mono CJK TC}
+	\\newCJKfontfamily[KRmain]\\krmain{Noto Sans CJK KR}
+	\\newCJKfontfamily[KRsans]\\krsans{Noto Sans CJK KR}
+	\\newCJKfontfamily[KRmono]\\krmono{Noto Sans Mono CJK KR}
+	\\newCJKfontfamily[JPmain]\\jpmain{Noto Sans CJK JP}
+	\\newCJKfontfamily[JPsans]\\jpsans{Noto Sans CJK JP}
+	\\newCJKfontfamily[JPmono]\\jpmono{Noto Sans Mono CJK JP}
 	% Define custom macros to on/off CJK
 	\\newcommand{\\kerneldocCJKon}{\\makexeCJKactive}
 	\\newcommand{\\kerneldocCJKoff}{\\makexeCJKinactive}
-	% To customize \sphinxtableofcontents
+	\\newcommand{\\kerneldocBeginSC}{%
+	    \\begingroup%
+	    \\scmain%
+	}
+	\\newcommand{\\kerneldocEndSC}{\\endgroup}
+	\\newcommand{\\kerneldocBeginTC}{%
+	    \\begingroup%
+	    \\tcmain%
+	    \\renewcommand{\\CJKsfdefault}{TCsans}%
+	    \\renewcommand{\\CJKttdefault}{TCmono}%
+	}
+	\\newcommand{\\kerneldocEndTC}{\\endgroup}
+	\\newcommand{\\kerneldocBeginKR}{%
+	    \\begingroup%
+	    \\krmain%
+	    \\renewcommand{\\CJKsfdefault}{KRsans}%
+	    \\renewcommand{\\CJKttdefault}{KRmono}%
+	}
+	\\newcommand{\\kerneldocEndKR}{\\endgroup}
+	\\newcommand{\\kerneldocBeginJP}{%
+	    \\begingroup%
+	    \\jpmain%
+	    \\renewcommand{\\CJKsfdefault}{JPsans}%
+	    \\renewcommand{\\CJKttdefault}{JPmono}%
+	}
+	\\newcommand{\\kerneldocEndJP}{\\endgroup}
+	% To customize \\sphinxtableofcontents
 	\\usepackage{etoolbox}
 	% Inactivate CJK after tableofcontents
 	\\apptocmd{\\sphinxtableofcontents}{\\kerneldocCJKoff}{}{}
@@ -372,6 +413,14 @@ latex_elements['preamble']  +=3D '''
 	% Custom macros to on/off CJK (Dummy)
 	\\newcommand{\\kerneldocCJKon}{}
 	\\newcommand{\\kerneldocCJKoff}{}
+	\\newcommand{\\kerneldocBeginSC}{}
+	\\newcommand{\\kerneldocEndSC}{}
+	\\newcommand{\\kerneldocBeginTC}{}
+	\\newcommand{\\kerneldocEndTC}{}
+	\\newcommand{\\kerneldocBeginKR}{}
+	\\newcommand{\\kerneldocEndKR}{}
+	\\newcommand{\\kerneldocBeginSC}{}
+	\\newcommand{\\kerneldocEndKR}{}
     }
 '''
=20
diff --git a/Documentation/translations/ja_JP/index.rst b/Documentation/t=
ranslations/ja_JP/index.rst
index f94ba62d41c3..88d4d98eed15 100644
--- a/Documentation/translations/ja_JP/index.rst
+++ b/Documentation/translations/ja_JP/index.rst
@@ -3,6 +3,7 @@
 	\renewcommand\thesection*
 	\renewcommand\thesubsection*
 	\kerneldocCJKon
+	\kerneldocBeginJP
=20
 Japanese translations
 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
@@ -11,3 +12,7 @@ Japanese translations
    :maxdepth: 1
=20
    howto
+
+.. raw:: latex
+
+	\kerneldocEndJP
diff --git a/Documentation/translations/ko_KR/index.rst b/Documentation/t=
ranslations/ko_KR/index.rst
index 6ae258118bdf..f636b482fb4c 100644
--- a/Documentation/translations/ko_KR/index.rst
+++ b/Documentation/translations/ko_KR/index.rst
@@ -3,6 +3,7 @@
 	\renewcommand\thesection*
 	\renewcommand\thesubsection*
 	\kerneldocCJKon
+	\kerneldocBeginKR
=20
 =ED=95=9C=EA=B5=AD=EC=96=B4 =EB=B2=88=EC=97=AD
 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
@@ -26,3 +27,4 @@
 .. raw:: latex
=20
     \normalsize
+    \kerneldocEndKR
diff --git a/Documentation/translations/zh_CN/index.rst b/Documentation/t=
ranslations/zh_CN/index.rst
index e0d51a167032..510ec10959fa 100644
--- a/Documentation/translations/zh_CN/index.rst
+++ b/Documentation/translations/zh_CN/index.rst
@@ -5,6 +5,7 @@
 	\renewcommand\thesection*
 	\renewcommand\thesubsection*
 	\kerneldocCJKon
+	\kerneldocBeginSC
=20
 .. _linux_doc_zh:
=20
@@ -189,3 +190,7 @@ TODOList:
 ----------
=20
 * :ref:`genindex`
+
+.. raw:: latex
+
+	\kerneldocEndSC
--=20
2.17.1