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docs: pdfdocs: Switch default CJK font to KR variants

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xeCJK is enabled in Table of Contents (TOC) so that translations.pdf
built by top-level "make pdfdocs" can have its TOC typeset properly.

This causes quotation marks and apostrophe symbols appear too wide in
Latin-script docs.
This is because (1) Sphinx converts ASCII symbols into multi-byte
UTF-8 ones in LaTeX and (2) in the SC variant of "Noto CJK" font
families, those UTF-8 symbols have full-width glyph.

The KR variant of the font families has half-width glyph for those
symbols and TOC pages should look nicer when it is used instead.

Switch the default CJK font families to the KR variant and teach
xeCJK of those symbols' widths.
To compensate the switch, teach xeCJK of the width in the SC and
TC variants.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/0c8ea878-0a6f-ea01-ab45-4e66c5facee9@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Akira Yokosawa 2022-02-01 09:02:14 +09:00 committed by Jonathan Corbet
parent 8716ef413a
commit 66939df539
1 changed files with 14 additions and 9 deletions
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23
Documentation/conf.py
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@ -460,13 +460,15 @@ latex_elements['preamble'] += '''
\\IfFontExistsTF{Noto Sans CJK SC}{
% This is needed for translations
\\usepackage{xeCJK}
\\IfFontExistsTF{Noto Serif CJK SC}{
\\setCJKmainfont{Noto Serif CJK SC}[AutoFakeSlant]
\\IfFontExistsTF{Noto Serif CJK KR}{
\\setCJKmainfont{Noto Serif CJK KR}[AutoFakeSlant]
}{
\\setCJKmainfont{Noto Sans CJK SC}[AutoFakeSlant]
\\setCJKmainfont{Noto Sans CJK KR}[AutoFakeSlant]
}
\\setCJKsansfont{Noto Sans CJK SC}[AutoFakeSlant]
\\setCJKmonofont{Noto Sans Mono CJK SC}[AutoFakeSlant]
\\setCJKsansfont{Noto Sans CJK KR}[AutoFakeSlant]
\\setCJKmonofont{Noto Sans Mono CJK KR}[AutoFakeSlant]
\\xeCJKDeclareCharClass{HalfLeft}{`“,`‘}
\\xeCJKDeclareCharClass{HalfRight}{`”,`’}
% CJK Language-specific font choices
\\IfFontExistsTF{Noto Serif CJK SC}{
\\newCJKfontfamily[SCmain]\\scmain{Noto Serif CJK SC}[AutoFakeSlant]
@ -513,11 +515,18 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocBeginSC}{%
\\begingroup%
\\scmain%
\\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
\\xeCJKDeclareCharClass{FullRight}{`”,`’}%
\\renewcommand{\\CJKrmdefault}{SCserif}%
\\renewcommand{\\CJKsfdefault}{SCsans}%
\\renewcommand{\\CJKttdefault}{SCmono}%
}
\\newcommand{\\kerneldocEndSC}{\\endgroup}
\\newcommand{\\kerneldocBeginTC}{%
\\begingroup%
\\tcmain%
\\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
\\xeCJKDeclareCharClass{FullRight}{`”,`’}%
\\renewcommand{\\CJKrmdefault}{TCserif}%
\\renewcommand{\\CJKsfdefault}{TCsans}%
\\renewcommand{\\CJKttdefault}{TCmono}%
@ -525,8 +534,6 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocEndTC}{\\endgroup}
\\newcommand{\\kerneldocBeginKR}{%
\\begingroup%
\\xeCJKDeclareCharClass{HalfLeft}{`“,`‘}%
\\xeCJKDeclareCharClass{HalfRight}{`”,`’}%
\\krmain%
\\renewcommand{\\CJKrmdefault}{KRserif}%
\\renewcommand{\\CJKsfdefault}{KRsans}%
@ -536,8 +543,6 @@ latex_elements['preamble'] += '''
\\newcommand{\\kerneldocEndKR}{\\endgroup}
\\newcommand{\\kerneldocBeginJP}{%
\\begingroup%
\\xeCJKDeclareCharClass{HalfLeft}{`“,`‘}%
\\xeCJKDeclareCharClass{HalfRight}{`”,`’}%
\\jpmain%
\\renewcommand{\\CJKrmdefault}{JPserif}%
\\renewcommand{\\CJKsfdefault}{JPsans}%