Commit 398f7abd authored by Akira Yokosawa's avatar Akira Yokosawa Committed by Jonathan Corbet
Browse files

docs: pdfdocs: Pull LaTeX preamble part out of conf.py

Quote from Jon's remark [1]:

    I do notice that Documentation/conf.py is getting large and
    unapproachable.  At some future point, it might be nice to pull
    all of the latex stuff out into a separate file where it won't
    scare people who stumble into it by accident.

Pull LaTeX preamble settings added since commit 3b4c9632 ("docs:
conf.py: adjust the LaTeX document output") out into
sphinx/kerneldoc-preamble.sty.

It will be copied to the build directory by the added
"latex_additional_files" setting in conf.py.

As a bonus, LaTeX/TeX code can be maintained without escaping backslashes.

To compensate the loss of change history in sphinx/kerneldoc-preamble.sty,
here is a list of changes made in conf.py:

  - f7ebe6b7 ("docs: Activate exCJK only in CJK chapters")
  - 0afd4df0 ("docs: pdfdocs: Prevent column squeezing by tabulary")
  - 659653c9 ("docs: pdfdocs: Refactor config for CJK document")
  - e291ff6f ("docs: pdfdocs: Add CJK-language-specific font settings")
  - 7eb368cc ("docs: pdfdocs: Choose Serif font as CJK mainfont if possible")
  - 35382965 ("docs: pdfdocs: Preserve inter-phrase space in Korean translations")
  - 77abc2c2 ("docs: pdfdocs: One-half spacing for CJK translations")
  - 788d28a2 ("docs: pdfdocs: Permit AutoFakeSlant for CJK fonts")
  - 29ac9822 ("docs: pdfdocs: Teach xeCJK about character classes of quotation marks")
  - 7c5c18bd ("docs: pdfdocs: Fix typo in CJK-language specific font settings")
  - aa872e06 ("docs: pdfdocs: Adjust \headheight for fancyhdr")
  - 8716ef41 ("docs: pdfdocs: Tweak width params of TOC")
  - 66939df5 ("docs: pdfdocs: Switch default CJK font to KR variants")
  - 7b686a2e ("docs: pdfdocs: Enable CJKspace in TOC for Korean titles")
  - 5d9158e3 ("docs/translations: Skip CJK contents if suitable fonts not found")
  - b774cc46 ("docs: pdfdocs: Move CJK monospace font setting to main conf.py")

[1]: https://lore.kernel.org/all/87zgmr66cn.fsf@meer.lwn.net/



Suggested-by: default avatarJonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAkira Yokosawa <akiyks@gmail.com>
Link: https://lore.kernel.org/r/aaa9dca1-27c0-c414-77f3-c5587db0cc5b@gmail.com


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent b089f167
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+13 −171
Original line number Diff line number Diff line
@@ -409,188 +409,25 @@ latex_elements = {

    # Additional stuff for the LaTeX preamble.
    'preamble': '''
	% Custom width parameters for TOC --- Redefine low-level commands
	% defined in report.cls
	\\makeatletter
	%% Redefine \\@pnumwidth (page number width)
	\\renewcommand*\\@pnumwidth{2.7em}
	%% Redefine \\l@chapter (chapter list entry)
	\\renewcommand*\\l@chapter[2]{%
	  \\ifnum \\c@tocdepth >\\m@ne
	    \\addpenalty{-\\@highpenalty}%
	    \\vskip 1.0em \\@plus\\p@
	    \\setlength\\@tempdima{1.8em}%
	    \\begingroup
	      \\parindent \\z@ \\rightskip \\@pnumwidth
	      \\parfillskip -\\@pnumwidth
	      \\leavevmode \\bfseries
	      \\advance\\leftskip\\@tempdima
	      \\hskip -\\leftskip
	      #1\\nobreak\\hfil
	      \\nobreak\\hb@xt@\\@pnumwidth{\\hss #2%
	                                 \\kern-\\p@\\kern\\p@}\\par
	      \\penalty\\@highpenalty
	    \\endgroup
	  \\fi}
	%% Redefine \\l@section and \\l@subsection
	\\renewcommand*\\l@section{\\@dottedtocline{1}{1.8em}{3.2em}}
	\\renewcommand*\\l@subsection{\\@dottedtocline{2}{5em}{4.3em}}
	\\makeatother
	%% Sphinx < 1.8 doesn't have \\sphinxtableofcontentshook
	\\providecommand{\\sphinxtableofcontentshook}{}
	%% Undefine it for compatibility with Sphinx 1.7.9
	\\renewcommand{\\sphinxtableofcontentshook}{} % Empty the hook
	% Prevent column squeezing of tabulary.
	\\setlength{\\tymin}{20em}
        % Use some font with UTF-8 support with XeLaTeX
        \\usepackage{fontspec}
        \\setsansfont{DejaVu Sans}
        \\setromanfont{DejaVu Serif}
        \\setmonofont{DejaVu Sans Mono}
        % Adjust \\headheight for fancyhdr
        \\addtolength{\\headheight}{1.6pt}
        \\addtolength{\\topmargin}{-1.6pt}
    ''',
}

# Translations have Asian (CJK) characters which are only displayed if
# xeCJK is used

latex_elements['preamble']  += '''
    \\IfFontExistsTF{Noto Sans CJK SC}{
	% This is needed for translations
	\\usepackage{xeCJK}
	\\IfFontExistsTF{Noto Serif CJK KR}{
	    \\setCJKmainfont{Noto Serif CJK KR}[AutoFakeSlant]
	}{
	    \\setCJKmainfont{Noto Sans CJK KR}[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]
	    \\newCJKfontfamily[SCserif]\\scserif{Noto Serif CJK SC}[AutoFakeSlant]
	}{
	    \\newCJKfontfamily[SCmain]\\scmain{Noto Sans CJK SC}[AutoFakeSlant]
	    \\newCJKfontfamily[SCserif]\\scserif{Noto Sans CJK SC}[AutoFakeSlant]
	}
	\\newCJKfontfamily[SCsans]\\scsans{Noto Sans CJK SC}[AutoFakeSlant]
	\\newCJKfontfamily[SCmono]\\scmono{Noto Sans Mono CJK SC}[AutoFakeSlant]
	\\IfFontExistsTF{Noto Serif CJK TC}{
	    \\newCJKfontfamily[TCmain]\\tcmain{Noto Serif CJK TC}[AutoFakeSlant]
	    \\newCJKfontfamily[TCserif]\\tcserif{Noto Serif CJK TC}[AutoFakeSlant]
	}{
	    \\newCJKfontfamily[TCmain]\\tcmain{Noto Sans CJK TC}[AutoFakeSlant]
	    \\newCJKfontfamily[TCserif]\\tcserif{Noto Sans CJK TC}[AutoFakeSlant]
	}
	\\newCJKfontfamily[TCsans]\\tcsans{Noto Sans CJK TC}[AutoFakeSlant]
	\\newCJKfontfamily[TCmono]\\tcmono{Noto Sans Mono CJK TC}[AutoFakeSlant]
	\\IfFontExistsTF{Noto Serif CJK KR}{
	    \\newCJKfontfamily[KRmain]\\krmain{Noto Serif CJK KR}[AutoFakeSlant]
	    \\newCJKfontfamily[KRserif]\\krserif{Noto Serif CJK KR}[AutoFakeSlant]
	}{
	    \\newCJKfontfamily[KRmain]\\krmain{Noto Sans CJK KR}[AutoFakeSlant]
	    \\newCJKfontfamily[KRserif]\\krserif{Noto Sans CJK KR}[AutoFakeSlant]
	}
	\\newCJKfontfamily[KRsans]\\krsans{Noto Sans CJK KR}[AutoFakeSlant]
	\\newCJKfontfamily[KRmono]\\krmono{Noto Sans Mono CJK KR}[AutoFakeSlant]
	\\IfFontExistsTF{Noto Serif CJK JP}{
	    \\newCJKfontfamily[JPmain]\\jpmain{Noto Serif CJK JP}[AutoFakeSlant]
	    \\newCJKfontfamily[JPserif]\\jpserif{Noto Serif CJK JP}[AutoFakeSlant]
	}{
	    \\newCJKfontfamily[JPmain]\\jpmain{Noto Sans CJK JP}[AutoFakeSlant]
	    \\newCJKfontfamily[JPserif]\\jpserif{Noto Sans CJK JP}[AutoFakeSlant]
	}
	\\newCJKfontfamily[JPsans]\\jpsans{Noto Sans CJK JP}[AutoFakeSlant]
	\\newCJKfontfamily[JPmono]\\jpmono{Noto Sans Mono CJK JP}[AutoFakeSlant]
	% Dummy commands for Sphinx < 2.3 (no 'extrapackages' support)
	\\providecommand{\\onehalfspacing}{}
	\\providecommand{\\singlespacing}{}
	% Define custom macros to on/off CJK
	\\newcommand{\\kerneldocCJKon}{\\makexeCJKactive\\onehalfspacing}
	\\newcommand{\\kerneldocCJKoff}{\\makexeCJKinactive\\singlespacing}
	\\newcommand{\\kerneldocBeginSC}{%
	    \\begingroup%
	    \\scmain%
	    \\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
	    \\xeCJKDeclareCharClass{FullRight}{`”,`’}%
	    \\renewcommand{\\CJKrmdefault}{SCserif}%
	    \\renewcommand{\\CJKsfdefault}{SCsans}%
	    \\renewcommand{\\CJKttdefault}{SCmono}%
	    \\xeCJKsetup{CJKspace = false}%
	    % For CJK ascii-art alignment
	    \\setmonofont{Noto Sans Mono CJK SC}[AutoFakeSlant]%
	}
	\\newcommand{\\kerneldocEndSC}{\\endgroup}
	\\newcommand{\\kerneldocBeginTC}{%
	    \\begingroup%
	    \\tcmain%
	    \\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
	    \\xeCJKDeclareCharClass{FullRight}{`”,`’}%
	    \\renewcommand{\\CJKrmdefault}{TCserif}%
	    \\renewcommand{\\CJKsfdefault}{TCsans}%
	    \\renewcommand{\\CJKttdefault}{TCmono}%
	    \\xeCJKsetup{CJKspace = false}%
	    % For CJK ascii-art alignment
	    \\setmonofont{Noto Sans Mono CJK TC}[AutoFakeSlant]%
	}
	\\newcommand{\\kerneldocEndTC}{\\endgroup}
	\\newcommand{\\kerneldocBeginKR}{%
	    \\begingroup%
	    \\krmain%
	    \\renewcommand{\\CJKrmdefault}{KRserif}%
	    \\renewcommand{\\CJKsfdefault}{KRsans}%
	    \\renewcommand{\\CJKttdefault}{KRmono}%
	    % \\xeCJKsetup{CJKspace = true} % true by default
	    % For CJK ascii-art alignment (still misaligned for Hangul)
	    \\setmonofont{Noto Sans Mono CJK KR}[AutoFakeSlant]%
	}
	\\newcommand{\\kerneldocEndKR}{\\endgroup}
	\\newcommand{\\kerneldocBeginJP}{%
	    \\begingroup%
	    \\jpmain%
	    \\renewcommand{\\CJKrmdefault}{JPserif}%
	    \\renewcommand{\\CJKsfdefault}{JPsans}%
	    \\renewcommand{\\CJKttdefault}{JPmono}%
	    \\xeCJKsetup{CJKspace = false}%
	    % For CJK ascii-art alignment
	    \\setmonofont{Noto Sans Mono CJK JP}[AutoFakeSlant]%
	}
	\\newcommand{\\kerneldocEndJP}{\\endgroup}
	% Single spacing in literal blocks
	\\fvset{baselinestretch=1}
	% To customize \\sphinxtableofcontents
	\\usepackage{etoolbox}
	% Inactivate CJK after tableofcontents
	\\apptocmd{\\sphinxtableofcontents}{\\kerneldocCJKoff}{}{}
	\\xeCJKsetup{CJKspace = true} % For inter-phrase space of Korean TOC
    }{ % No CJK font found
	% Custom macros to on/off CJK (Dummy)
	\\newcommand{\\kerneldocCJKon}{}
	\\newcommand{\\kerneldocCJKoff}{}
	\\newcommand{\\kerneldocBeginSC}[1]{%
	    \\begin{sphinxadmonition}{note}{Note:}
		``Noto Sans CJK'' fonts are not found while building this PDF\\@.
		Translations of zh\\_CN, zh\\_TW, ko\\_KR, and ja\\_JP are
		skipped.
	    \\end{sphinxadmonition}}
	\\newcommand{\\kerneldocEndSC}{}
	\\newcommand{\\kerneldocBeginTC}[1]{}
	\\newcommand{\\kerneldocEndTC}{}
	\\newcommand{\\kerneldocBeginKR}[1]{}
	\\newcommand{\\kerneldocEndKR}{}
	\\newcommand{\\kerneldocBeginJP}[1]{}
	\\newcommand{\\kerneldocEndJP}{}
    }
'''

# Fix reference escape troubles with Sphinx 1.4.x
if major == 1:
    latex_elements['preamble']  += '\\renewcommand*{\\DUrole}[2]{ #2 }\n'


# Load kerneldoc specific LaTeX settings
latex_elements['preamble'] += '''
        % Load kerneldoc specific LaTeX settings
	\\input{kerneldoc-preamble.sty}
'''

# With Sphinx 1.6, it is possible to change the Bg color directly
# by using:
#	\definecolor{sphinxnoteBgColor}{RGB}{204,255,255}
@@ -652,6 +489,11 @@ for fn in os.listdir('.'):
# If false, no module index is generated.
#latex_domain_indices = True

# Additional LaTeX stuff to be copied to build directory
latex_additional_files = [
    'sphinx/kerneldoc-preamble.sty',
]


# -- Options for manual page output ---------------------------------------

+184 −0
Original line number Diff line number Diff line
% -*- coding: utf-8 -*-
% SPDX-License-Identifier: GPL-2.0
%
% LaTeX preamble for "make latexdocs" or "make pdfdocs" including:
%   - TOC width settings
%   - Setting of tabulary (\tymin)
%   - Headheight setting for fancyhdr
%   - Fontfamily settings for CJK (Chinese, Japanese, and Korean) translations
%
% Note on the suffix of .sty:
%   This is not implemented as a LaTeX style file, but as a file containing
%   plain LaTeX code to be included into preamble.
%   ".sty" is chosen because ".tex" would cause the build scripts to confuse
%   this file with a LaTeX main file.
%
% Copyright (C) 2022  Akira Yokosawa

% Custom width parameters for TOC --- Redefine low-level commands
% defined in report.cls
\makeatletter
%% Redefine \@pnumwidth (page number width)
\renewcommand*\@pnumwidth{2.7em}
%% Redefine \l@chapter (chapter list entry)
\renewcommand*\l@chapter[2]{%
  \ifnum \c@tocdepth >\m@ne
    \addpenalty{-\@highpenalty}%
    \vskip 1.0em \@plus\p@
    \setlength\@tempdima{1.8em}%
    \begingroup
      \parindent \z@ \rightskip \@pnumwidth
      \parfillskip -\@pnumwidth
      \leavevmode \bfseries
      \advance\leftskip\@tempdima
      \hskip -\leftskip
      #1\nobreak\hfil
      \nobreak\hb@xt@\@pnumwidth{\hss #2%
                                 \kern-\p@\kern\p@}\par
      \penalty\@highpenalty
    \endgroup
  \fi}
%% Redefine \l@section and \l@subsection
\renewcommand*\l@section{\@dottedtocline{1}{1.8em}{3.2em}}
\renewcommand*\l@subsection{\@dottedtocline{2}{5em}{4.3em}}
\makeatother
%% Sphinx < 1.8 doesn't have \sphinxtableofcontentshook
\providecommand{\sphinxtableofcontentshook}{}
%% Undefine it for compatibility with Sphinx 1.7.9
\renewcommand{\sphinxtableofcontentshook}{} % Empty the hook
% Prevent column squeezing of tabulary.
\setlength{\tymin}{20em}

% Adjust \headheight for fancyhdr
\addtolength{\headheight}{1.6pt}
\addtolength{\topmargin}{-1.6pt}

% Translations have Asian (CJK) characters which are only displayed if
% xeCJK is used
\IfFontExistsTF{Noto Sans CJK SC}{
    % This is needed for translations
    \usepackage{xeCJK}
    \IfFontExistsTF{Noto Serif CJK KR}{
	\setCJKmainfont{Noto Serif CJK KR}[AutoFakeSlant]
    }{
	\setCJKmainfont{Noto Sans CJK KR}[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]
	\newCJKfontfamily[SCserif]\scserif{Noto Serif CJK SC}[AutoFakeSlant]
    }{
	\newCJKfontfamily[SCmain]\scmain{Noto Sans CJK SC}[AutoFakeSlant]
	\newCJKfontfamily[SCserif]\scserif{Noto Sans CJK SC}[AutoFakeSlant]
    }
    \newCJKfontfamily[SCsans]\scsans{Noto Sans CJK SC}[AutoFakeSlant]
    \newCJKfontfamily[SCmono]\scmono{Noto Sans Mono CJK SC}[AutoFakeSlant]
    \IfFontExistsTF{Noto Serif CJK TC}{
	\newCJKfontfamily[TCmain]\tcmain{Noto Serif CJK TC}[AutoFakeSlant]
	\newCJKfontfamily[TCserif]\tcserif{Noto Serif CJK TC}[AutoFakeSlant]
    }{
	\newCJKfontfamily[TCmain]\tcmain{Noto Sans CJK TC}[AutoFakeSlant]
	\newCJKfontfamily[TCserif]\tcserif{Noto Sans CJK TC}[AutoFakeSlant]
    }
    \newCJKfontfamily[TCsans]\tcsans{Noto Sans CJK TC}[AutoFakeSlant]
    \newCJKfontfamily[TCmono]\tcmono{Noto Sans Mono CJK TC}[AutoFakeSlant]
    \IfFontExistsTF{Noto Serif CJK KR}{
	\newCJKfontfamily[KRmain]\krmain{Noto Serif CJK KR}[AutoFakeSlant]
	\newCJKfontfamily[KRserif]\krserif{Noto Serif CJK KR}[AutoFakeSlant]
    }{
	\newCJKfontfamily[KRmain]\krmain{Noto Sans CJK KR}[AutoFakeSlant]
	\newCJKfontfamily[KRserif]\krserif{Noto Sans CJK KR}[AutoFakeSlant]
    }
    \newCJKfontfamily[KRsans]\krsans{Noto Sans CJK KR}[AutoFakeSlant]
    \newCJKfontfamily[KRmono]\krmono{Noto Sans Mono CJK KR}[AutoFakeSlant]
    \IfFontExistsTF{Noto Serif CJK JP}{
	\newCJKfontfamily[JPmain]\jpmain{Noto Serif CJK JP}[AutoFakeSlant]
	\newCJKfontfamily[JPserif]\jpserif{Noto Serif CJK JP}[AutoFakeSlant]
    }{
	\newCJKfontfamily[JPmain]\jpmain{Noto Sans CJK JP}[AutoFakeSlant]
	\newCJKfontfamily[JPserif]\jpserif{Noto Sans CJK JP}[AutoFakeSlant]
    }
    \newCJKfontfamily[JPsans]\jpsans{Noto Sans CJK JP}[AutoFakeSlant]
    \newCJKfontfamily[JPmono]\jpmono{Noto Sans Mono CJK JP}[AutoFakeSlant]
    % Dummy commands for Sphinx < 2.3 (no 'extrapackages' support)
    \providecommand{\onehalfspacing}{}
    \providecommand{\singlespacing}{}
    % Define custom macros to on/off CJK
    \newcommand{\kerneldocCJKon}{\makexeCJKactive\onehalfspacing}
    \newcommand{\kerneldocCJKoff}{\makexeCJKinactive\singlespacing}
    \newcommand{\kerneldocBeginSC}{%
	\begingroup%
	\scmain%
	\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
	\xeCJKDeclareCharClass{FullRight}{`”,`’}%
	\renewcommand{\CJKrmdefault}{SCserif}%
	\renewcommand{\CJKsfdefault}{SCsans}%
	\renewcommand{\CJKttdefault}{SCmono}%
	\xeCJKsetup{CJKspace = false}%
	% For CJK ascii-art alignment
	\setmonofont{Noto Sans Mono CJK SC}[AutoFakeSlant]%
    }
    \newcommand{\kerneldocEndSC}{\endgroup}
    \newcommand{\kerneldocBeginTC}{%
	\begingroup%
	\tcmain%
	\xeCJKDeclareCharClass{FullLeft}{`“,`‘}%
	\xeCJKDeclareCharClass{FullRight}{`”,`’}%
	\renewcommand{\CJKrmdefault}{TCserif}%
	\renewcommand{\CJKsfdefault}{TCsans}%
	\renewcommand{\CJKttdefault}{TCmono}%
	\xeCJKsetup{CJKspace = false}%
	% For CJK ascii-art alignment
	\setmonofont{Noto Sans Mono CJK TC}[AutoFakeSlant]%
    }
    \newcommand{\kerneldocEndTC}{\endgroup}
    \newcommand{\kerneldocBeginKR}{%
	\begingroup%
	\krmain%
	\renewcommand{\CJKrmdefault}{KRserif}%
	\renewcommand{\CJKsfdefault}{KRsans}%
	\renewcommand{\CJKttdefault}{KRmono}%
	% \xeCJKsetup{CJKspace = true} % true by default
	% For CJK ascii-art alignment (still misaligned for Hangul)
	\setmonofont{Noto Sans Mono CJK KR}[AutoFakeSlant]%
    }
    \newcommand{\kerneldocEndKR}{\endgroup}
    \newcommand{\kerneldocBeginJP}{%
	\begingroup%
	\jpmain%
	\renewcommand{\CJKrmdefault}{JPserif}%
	\renewcommand{\CJKsfdefault}{JPsans}%
	\renewcommand{\CJKttdefault}{JPmono}%
	\xeCJKsetup{CJKspace = false}%
	% For CJK ascii-art alignment
	\setmonofont{Noto Sans Mono CJK JP}[AutoFakeSlant]%
    }
    \newcommand{\kerneldocEndJP}{\endgroup}
    % Single spacing in literal blocks
    \fvset{baselinestretch=1}
    % To customize \sphinxtableofcontents
    \usepackage{etoolbox}
    % Inactivate CJK after tableofcontents
    \apptocmd{\sphinxtableofcontents}{\kerneldocCJKoff}{}{}
    \xeCJKsetup{CJKspace = true} % For inter-phrase space of Korean TOC
}{ % No CJK font found
    % Custom macros to on/off CJK (Dummy)
    \newcommand{\kerneldocCJKon}{}
    \newcommand{\kerneldocCJKoff}{}
    \newcommand{\kerneldocBeginSC}[1]{%
	\begin{sphinxadmonition}{note}{Note:}
	    ``Noto Sans CJK'' fonts are not found while building this PDF\@.
	    Translations of zh\_CN, zh\_TW, ko\_KR, and ja\_JP are skipped.
	\end{sphinxadmonition}}
    \newcommand{\kerneldocEndSC}{}
    \newcommand{\kerneldocBeginTC}[1]{}
    \newcommand{\kerneldocEndTC}{}
    \newcommand{\kerneldocBeginKR}[1]{}
    \newcommand{\kerneldocEndKR}{}
    \newcommand{\kerneldocBeginJP}[1]{}
    \newcommand{\kerneldocEndJP}{}
}