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docs: pdfdocs: Add conf.py local to translations for ascii-art alignment

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Globally choosing "Noto Sans Mono CJK SC" would result in sub-optimal look
of literal blocks in Latin documents.
Therefore, localize the font choice to translations by adding conf.py under
Documentation/translations/.

The local conf.py is enabled when the command:

    make SPHINXDIRS=translations pdfdocs

is used to build the PDF.
Resulting translations.pdf (under Documentation/output/translations/pdf)
will have properly aligned ascii-art figures.

NOTE: There remain mis-aligned ascii-art figures in Korean translations.
This is due to the font designer's decision to assign slightly narrower
widths (920) to Hangul characters in "Noto Sans Mono CJK KR" than those
of Hanja (Hanzi/Kanji) characters (1000) [1].

[1]: https://github.com/googlefonts/noto-cjk/issues/17

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Link: https://lore.kernel.org/r/79a876fc-a552-f972-4a1b-c6df4cbb36dd@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Akira Yokosawa 2021-08-09 10:21:29 +09:00 committed by Jonathan Corbet
parent 35382965bd
commit a90dad8f61
1 changed files with 12 additions and 0 deletions
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Documentation/translations/conf.py Normal file
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# -*- coding: utf-8 -*-
# SPDX-License-Identifier: GPL-2.0
# -- Additinal options for LaTeX output ----------------------------------
# font config for ascii-art alignment
latex_elements['preamble'] += '''
\\IfFontExistsTF{Noto Sans CJK SC}{
% For CJK ascii-art alignment
\\setmonofont{Noto Sans Mono CJK SC}
}{}
'''