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docs: pdfdocs: Choose Serif font as CJK mainfont if possible 

"Noto Serif CJK SC" and its variants suit better with the roman font
of Latin letters.

On some distros such as Fedora, it is possible to partially install
"Noto Sans CJK" fonts.
So, if the Serif fonts are not found on the system, fall back to the
Sans fonts.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Link: https://lore.kernel.org/r/5e454140-5d0c-35d4-8c31-3ffb2420793a@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Akira Yokosawa 2021-08-09 10:17:00 +09:00 committed by Jonathan Corbet
parent e291ff6f5a
commit 7eb368cc31
1 changed files with 36 additions and 5 deletions
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41
Documentation/conf.py
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@ -360,20 +360,48 @@ latex_elements['preamble'] += '''
\\IfFontExistsTF{Noto Sans CJK SC}{
% This is needed for translations
\\usepackage{xeCJK}
\\setCJKmainfont{Noto Sans CJK SC}
\\IfFontExistsTF{Noto Serif CJK SC}{
\\setCJKmainfont{Noto Serif CJK SC}
}{
\\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}
\\IfFontExistsTF{Noto Serif CJK SC}{
\\newCJKfontfamily[SCmain]\\scmain{Noto Serif CJK SC}
\\newCJKfontfamily[SCserif]\\scserif{Noto Serif CJK SC}
}{
\\newCJKfontfamily[SCmain]\\scmain{Noto Sans CJK SC}
\\newCJKfontfamily[SCserif]\\scserif{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}
\\IfFontExistsTF{Noto Serif CJK TC}{
\\newCJKfontfamily[TCmain]\\tcmain{Noto Serif CJK TC}
\\newCJKfontfamily[TCserif]\\tcserif{Noto Serif CJK TC}
}{
\\newCJKfontfamily[TCmain]\\tcmain{Noto Sans CJK TC}
\\newCJKfontfamily[TCserif]\\tcserif{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}
\\IfFontExistsTF{Noto Serif CJK KR}{
\\newCJKfontfamily[KRmain]\\krmain{Noto Serif CJK KR}
\\newCJKfontfamily[KRserif]\\krserif{Noto Serif CJK KR}
}{
\\newCJKfontfamily[KRmain]\\krmain{Noto Sans CJK KR}
\\newCJKfontfamily[KRserif]\\krserif{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}
\\IfFontExistsTF{Noto Serif CJK JP}{
\\newCJKfontfamily[JPmain]\\jpmain{Noto Serif CJK JP}
\\newCJKfontfamily[JPserif]\\jpserif{Noto Serif CJK JP}
}{
\\newCJKfontfamily[JPmain]\\jpmain{Noto Sans CJK JP}
\\newCJKfontfamily[JPserif]\\jpserif{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
@ -387,6 +415,7 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocBeginTC}{%
\\begingroup%
\\tcmain%
\\renewcommand{\\CJKrmdefault}{TCserif}%
\\renewcommand{\\CJKsfdefault}{TCsans}%
\\renewcommand{\\CJKttdefault}{TCmono}%
}
@ -394,6 +423,7 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocBeginKR}{%
\\begingroup%
\\krmain%
\\renewcommand{\\CJKrmdefault}{KRserif}%
\\renewcommand{\\CJKsfdefault}{KRsans}%
\\renewcommand{\\CJKttdefault}{KRmono}%
}
@ -401,6 +431,7 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocBeginJP}{%
\\begingroup%
\\jpmain%
\\renewcommand{\\CJKrmdefault}{JPserif}%
\\renewcommand{\\CJKsfdefault}{JPsans}%
\\renewcommand{\\CJKttdefault}{JPmono}%
}