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classes.dtx
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classes.dtx
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% \iffalse meta-comment
%
% Copyright (C) 1993-2019
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
%
% \iffalse
% \section{Identification}
%
% These document classes can only be used with \LaTeXe, so we make
% sure that an appropriate message is displayed when another \TeX{}
% format is used.
% \changes{v1.3p}{1995/11/30}{Added date of \LaTeX\ format to argument
% of \cs{NeedsTeXFormat}}
% \begin{macrocode}
%<article|report|book>\NeedsTeXFormat{LaTeX2e}[1995/12/01]
% \end{macrocode}
%
% Announce the Class name and its version:
% \begin{macrocode}
%<article>\ProvidesClass{article}
%<report>\ProvidesClass{report}
%<book>\ProvidesClass{book}
%<10pt&!bk>\ProvidesFile{size10.clo}
%<11pt&!bk>\ProvidesFile{size11.clo}
%<12pt&!bk>\ProvidesFile{size12.clo}
%<10pt&bk>\ProvidesFile{bk10.clo}
%<11pt&bk>\ProvidesFile{bk11.clo}
%<12pt&bk>\ProvidesFile{bk12.clo}
%<*driver>
\ProvidesFile{classes.drv}
%</driver>
[2019/10/25 v1.4k
%<article|report|book> Standard LaTeX document class]
%<10pt|11pt|12pt> Standard LaTeX file (size option)]
% \end{macrocode}
%
% \section{A driver for this document}
%
% The next bit of code contains the documentation driver file for
% \TeX{}, i.e., the file that will produce the documentation you are
% currently reading. It will be extracted from this file by the
% {\sc docstrip} program.
%
% \changes{1.0f}{1993/12/07}{Use class ltxdoc document class}
% \changes{1.0r}{1994/02/28}{Moved driver code in order not to need a
% separate driver}
% \begin{macrocode}
%<*driver>
]
\documentclass{ltxdoc}
% \end{macrocode}
%
% We don't want everything to appear in the index
% \begin{macrocode}
\DoNotIndex{\',\.,\@M,\@@input,\@Alph,\@alph,\@addtoreset,\@arabic}
\DoNotIndex{\@badmath,\@centercr,\@cite}
\DoNotIndex{\@dotsep,\@empty,\@float,\@gobble,\@gobbletwo,\@ignoretrue}
\DoNotIndex{\@input,\@ixpt,\@m,\@minus,\@mkboth}
\DoNotIndex{\@ne,\@nil,\@nomath,\@plus,\roman,\@set@topoint}
\DoNotIndex{\@tempboxa,\@tempcnta,\@tempdima,\@tempdimb}
\DoNotIndex{\@tempswafalse,\@tempswatrue,\@viipt,\@viiipt,\@vipt}
\DoNotIndex{\@vpt,\@warning,\@xiipt,\@xipt,\@xivpt,\@xpt,\@xviipt}
\DoNotIndex{\@xxpt,\@xxvpt,\\,\ ,\addpenalty,\addtolength,\addvspace}
\DoNotIndex{\advance,\ast,\begin,\begingroup,\bfseries,\bgroup,\box}
\DoNotIndex{\bullet}
\DoNotIndex{\cdot,\cite,\CodelineIndex,\cr,\day,\DeclareOption}
\DoNotIndex{\def,\DisableCrossrefs,\divide,\DocInput,\documentclass}
\DoNotIndex{\DoNotIndex,\egroup,\ifdim,\else,\fi,\em,\endtrivlist}
\DoNotIndex{\EnableCrossrefs,\end,\end@dblfloat,\end@float,\endgroup}
\DoNotIndex{\endlist,\everycr,\everypar,\ExecuteOptions,\expandafter}
\DoNotIndex{\fbox}
\DoNotIndex{\filedate,\filename,\fileversion,\fontsize,\framebox,\gdef}
\DoNotIndex{\global,\halign,\hangindent,\hbox,\hfil,\hfill,\hrule}
\DoNotIndex{\hsize,\hskip,\hspace,\hss,\if@tempswa,\ifcase,\or,\fi,\fi}
\DoNotIndex{\ifhmode,\ifvmode,\ifnum,\iftrue,\ifx,\fi,\fi,\fi,\fi,\fi}
\DoNotIndex{\input}
\DoNotIndex{\jobname,\kern,\leavevmode,\let,\leftmark}
\DoNotIndex{\list,\llap,\long,\m@ne,\m@th,\mark,\markboth,\markright}
\DoNotIndex{\month,\newcommand,\newcounter,\newenvironment}
\DoNotIndex{\NeedsTeXFormat,\newdimen}
\DoNotIndex{\newlength,\newpage,\nobreak,\noindent,\null,\number}
\DoNotIndex{\numberline,\OldMakeindex,\OnlyDescription,\p@}
\DoNotIndex{\pagestyle,\par,\paragraph,\paragraphmark,\parfillskip}
\DoNotIndex{\penalty,\PrintChanges,\PrintIndex,\ProcessOptions}
\DoNotIndex{\protect,\ProvidesClass,\raggedbottom,\raggedright}
\DoNotIndex{\refstepcounter,\relax,\renewcommand}
\DoNotIndex{\rightmargin,\rightmark,\rightskip,\rlap,\rmfamily}
\DoNotIndex{\secdef,\selectfont,\setbox,\setcounter,\setlength}
\DoNotIndex{\settowidth,\sfcode,\skip,\sloppy,\slshape,\space}
\DoNotIndex{\symbol,\the,\trivlist,\typeout,\tw@,\undefined,\uppercase}
\DoNotIndex{\usecounter,\usefont,\usepackage,\vfil,\vfill,\viiipt}
\DoNotIndex{\viipt,\vipt,\vskip,\vspace}
\DoNotIndex{\wd,\xiipt,\year,\z@}
% \end{macrocode}
% We do want an index, using linenumbers
% \begin{macrocode}
\EnableCrossrefs
\CodelineIndex
% \end{macrocode}
% We use so many \file{docstrip} modules that we set the
% \texttt{StandardModuleDepth} counter to 1.
% \begin{macrocode}
\setcounter{StandardModuleDepth}{1}
% \end{macrocode}
% The following command retrieves the date and version information
% from the file.
% \begin{macrocode}
\GetFileInfo{classes.drv}
% \end{macrocode}
% Some commonly used abbreviations
% \changes{v1.2w}{1994/12/01}{Use \cs{newcommand*}}
% \begin{macrocode}
\newcommand*{\Lopt}[1]{\textsf {#1}}
\newcommand*{\file}[1]{\texttt {#1}}
\newcommand*{\Lcount}[1]{\textsl {\small#1}}
\newcommand*{\pstyle}[1]{\textsl {#1}}
% \end{macrocode}
% We also want the full details.
% \begin{macrocode}
\begin{document}
\DocInput{classes.dtx}
\PrintIndex
% ^^A\PrintChanges
\end{document}
%</driver>
% \end{macrocode}
%
% \fi
%
% \changes{v1.0d}{1993/11/30}{remove \cs{@in}, made option makeindex
% a synonym for option makeidx}
% \changes{v1.0d}{1993/11/30}{removed \cs{@minus}, \cs{@plus},
% \cs{@settopoint}, \cs{@setfontsize}; they are now in the
% kernel}
% \changes{v1.0d}{1993/11/30}{Added use of \cs{NeedsTeXFormat}}
% \changes{v1.0d}{1993/11/30}{Replaced \cs{bf} with \cs{bfseries};
% \cs{rm} with \cs{rmfamily}}
% \changes{v1.0d}{1993/11/30}{Made equation and eqnarray environments
% in the fleqn option up to date with latex.dtx}
% \changes{v1.0f}{1993/12/08}{Made all lines shorter than 72 characters}
% \changes{v1.0g}{1993/12/08}{Made change in eqnarray for the fleqn
% option, as suggested by Rainer.}
% \changes{v1.0h}{1993/12/18}{Made the definitions of the font- and
% size-changing commands use \cs{renew} rather than \cs{new}.
% Defined the float parameters with \cs{renewcommand} rather than
% \cs{newcommand}. Corrected some typos in the fleqn option.
% Replaced two occurrences of -\cs{@secpenalty} by
% \cs{@secpenalty}. ASAJ.}
% \changes{v1.0j}{1993/12/20}{Added \cs{ProvidesFile} to size files}
% \changes{v1.0j}{1993/12/10}{Use \cs{cmd} in change entries}
% \changes{v1.0k}{1994/01/09}{Removed some typos/bugs}
% \changes{v1.0l}{1994/01/11}{add the extension to the names of the
% files}
% \changes{v1.0l}{1994/01/10}{Changed version numbering; moved leqno
% and fleqn options to an external file.}
% \changes{v1.0n}{1994/01/19}{Removed code for makeidx option and made
% it a separate package; removed use of \cs{setlength} from list
% parameters.}
% \changes{v1.0o}{1994/01/31}{Small documentation changes}
% \changes{v1.0q}{1994/02/16}{Small documentation changes}
% \changes{v1.1a}{1994/03/12}{Removed \cs{typeout} messages}
% \changes{v1.1f}{1994/04/15}{Inserted forgotten line break}
% \changes{v1.2a}{1994/03/17}{Added openright option. (LL)}
% \changes{v1.2b}{1994/03/17}{Added the \ldots{}matter commands. (LL)}
% \changes{v1.2c}{1994/03/17}{Fixed page numbering in titlepage
% env. (LL)}
% \changes{v1.2d}{1994/04/11}{Checked the file for long lines and
% wrapped them when necessary; made a slight implementation
% modification to the openright and openany options.}
% \changes{v1.2i}{1994/04/28}{Use LaTeX instead of LaTeX2e in messages}
% \changes{v1.2j}{1994/05/01}{Removed the use of \cs{fileversion}
% c.s.}
% \changes{v1.2l}{1994/05/11}{changed some \cs{changes} entries}
% \changes{v1.2m}{1994/05/12}{Forgot a few entries}
% \changes{v1.2o}{1994/05/24}{Changed file information}
% \changes{v1.2p}{1994/05/27}{Moved identification and driver to the
% front of the file}
% \changes{v1.2t}{1994/06/22}{Refrased a few sentences to prevent
% overfull hboxes}
% \changes{v1.2v}{1994/12/01}{Made the oneside option work for the
% book class}
% \changes{v1.2w}{1994/12/01}{Use \cs{newcommand*} for commands with
% arguments}
% \changes{v1.2z}{1995/05/16}{Always use \cs{cs} in \cs{changes}
% entries}
% \changes{v1.3a}{1995/05/17}{Replaced all \cs{hbox to} by \cs{hb@xt@}}
% \changes{v1.3d}{1995/06/05}{Replaced all \cs{uppercase} by
% \cs{MakeUppercase}}
% \changes{v1.3l}{1995/10/20}{Disabled in compatibility mode all
% options that are new in \LaTeXe.}
% \changes{v1.3v}{1997/06/16}{Documentation fixes.}
% \changes{v1.4j}{2019/08/27}{Various commands made robust}
%
%
% \title{Standard Document Classes for \LaTeX{} version 2e\thanks{This
% file has version number \fileversion, last revised \filedate.}}
%
% \author{%
% Copyright (C) 1992 by Leslie Lamport \and
% Copyright (C) 1994-2019 by Frank Mittelbach \and Johannes Braams \and
% \LaTeX3 Project Team
% }
% \date{\filedate}
% \MaintainedByLaTeXTeam{latex}
% \maketitle
% \tableofcontents
%
% \StopEventually{} ^^A
%
% \section{The {\sc docstrip} modules}
%
% The following modules are used in the implementation to direct
% {\sc docstrip} in generating the external files:
% \begin{center}
% \begin{tabular}{ll}
% article & produce the documentclass article\\
% report & produce the documentclass report\\
% size10 & produce the class option for 10pt\\
% size11 & produce the class option for 11pt\\
% size12 & produce the class option for 12pt\\
% book & produce the documentclass book\\
% bk10 & produce the book class option for 10pt\\
% bk11 & produce the book class option for 11pt\\
% bk12 & produce the book class option for 12pt\\
% driver & produce a documentation driver file \\
% \end{tabular}
% \end{center}
%
% \section{Initial Code}
%
% In this part we define a few commands that are used later on.
%
% \begin{macro}{\@ptsize}
% This control sequence is used to store the second digit of the
% pointsize we are typesetting in. So, normally, it's value is one
% of 0, 1 or 2.
% \begin{macrocode}
%<*article|report|book>
\newcommand\@ptsize{}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\if@restonecol}
% When the document has to be printed in two columns, we sometimes
% have to temporarily switch to one column. This switch is used to
% remember to switch back.
% \begin{macrocode}
\newif\if@restonecol
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\if@titlepage}
% A switch to indicate if a titlepage has to be produced. For the
% article document class the default is not to make a separate
% titlepage.
% \begin{macrocode}
\newif\if@titlepage
%<article>\@titlepagefalse
%<!article>\@titlepagetrue
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\if@openright}
% A switch to indicate if chapters must start on a right-hand page.
% The default for the report class is no; for the book class it's
% yes.
% \begin{macrocode}
%<!article>\newif\if@openright
% \end{macrocode}
% \end{macro}
%
% \changes{v1.3k}{1995/08/27}{Macro \cs{if@openbib} removed}
%
% \begin{macro}{\if@mainmatter}
% \changes{v1.2v}{1994/12/01}{Moved the allocation of
% \cs{if@mainmatter} here}
%
% The switch |\if@mainmatter|, only available in the document class
% book, indicates whether we are processing the main material in
% the book.
% \begin{macrocode}
%<book>\newif\if@mainmatter \@mainmattertrue
% \end{macrocode}
% \end{macro}
%
% \section{Declaration of Options}
%
%
% \subsection{Setting Paper Sizes}
%
% The variables |\paperwidth| and |\paperheight| should reflect the
% physical paper size after trimming. For desk printer output this
% is usually the real paper size since there is no post-processing.
% Classes for real book production will probably add other paper
% sizes and additionally the production of crop marks for trimming.
% In compatibility mode, these (and some of the subsequent) options
% are disabled, as they were not present in \LaTeX 2.09.
% \changes{v1.0g}{1993/12/09}{Removed typo, A4 is not 279 mm high}
% \begin{macrocode}
\if@compatibility\else
\DeclareOption{a4paper}
{\setlength\paperheight {297mm}%
\setlength\paperwidth {210mm}}
\DeclareOption{a5paper}
{\setlength\paperheight {210mm}%
\setlength\paperwidth {148mm}}
\DeclareOption{b5paper}
{\setlength\paperheight {250mm}%
\setlength\paperwidth {176mm}}
\DeclareOption{letterpaper}
{\setlength\paperheight {11in}%
\setlength\paperwidth {8.5in}}
\DeclareOption{legalpaper}
{\setlength\paperheight {14in}%
\setlength\paperwidth {8.5in}}
\DeclareOption{executivepaper}
{\setlength\paperheight {10.5in}%
\setlength\paperwidth {7.25in}}
% \end{macrocode}
%
% The option \Lopt{landscape} switches the values of |\paperheight|
% and |\paperwidth|, assuming the dimensions were given for portrait
% paper.
% \begin{macrocode}
\DeclareOption{landscape}
{\setlength\@tempdima {\paperheight}%
\setlength\paperheight {\paperwidth}%
\setlength\paperwidth {\@tempdima}}
\fi
% \end{macrocode}
%
% \subsection{Choosing the type size}
%
% The type size options are handled by defining |\@ptsize| to contain
% the last digit of the size in question and branching on |\ifcase|
% statements. This is done for historical reasons to stay compatible
% with other packages that use the |\@ptsize| variable to select
% special actions. It makes the declarations of size options less
% than 10pt difficult, although one can probably use \texttt{9}
% and \texttt{8} assuming that a class wont define both
% \Lopt{8pt} and \Lopt{18pt} options.
%
% \begin{macrocode}
\if@compatibility
\renewcommand\@ptsize{0}
\else
\DeclareOption{10pt}{\renewcommand\@ptsize{0}}
\fi
\DeclareOption{11pt}{\renewcommand\@ptsize{1}}
\DeclareOption{12pt}{\renewcommand\@ptsize{2}}
% \end{macrocode}
%
%
% \subsection{Two-side or one-side printing}
%
% For two-sided printing we use the switch |\if@twoside|. In
% addition we have to set the |\if@mparswitch| to get any margin
% paragraphs into the outside margin.
% \begin{macrocode}
\if@compatibility\else
\DeclareOption{oneside}{\@twosidefalse \@mparswitchfalse}
\fi
\DeclareOption{twoside}{\@twosidetrue \@mparswitchtrue}
% \end{macrocode}
%
%
% \subsection{Draft option}
%
% If the user requests \Lopt{draft} we show any overfull boxes.
% We could probably add some more interesting stuff to this option.
% \begin{macrocode}
\DeclareOption{draft}{\setlength\overfullrule{5pt}}
\if@compatibility\else
\DeclareOption{final}{\setlength\overfullrule{0pt}}
\fi
% \end{macrocode}
%
% \subsection{Titlepage option}
% An article usually has no separate titlepage, but the user can
% request one.
% \begin{macrocode}
\DeclareOption{titlepage}{\@titlepagetrue}
\if@compatibility\else
\DeclareOption{notitlepage}{\@titlepagefalse}
\fi
% \end{macrocode}
%
% \subsection{openright option}
% This option determines whether or not a chapter must start on
% a right-hand page
% request one.
% \begin{macrocode}
%<!article>\if@compatibility
%<book>\@openrighttrue
%<!article>\else
%<!article>\DeclareOption{openright}{\@openrighttrue}
%<!article>\DeclareOption{openany}{\@openrightfalse}
%<!article>\fi
% \end{macrocode}
%
% \subsection{Twocolumn printing}
%
% Two-column and one-column printing is again realized via a switch.
% \begin{macrocode}
\if@compatibility\else
\DeclareOption{onecolumn}{\@twocolumnfalse}
\fi
\DeclareOption{twocolumn}{\@twocolumntrue}
% \end{macrocode}
%
% \subsection{Equation numbering on the left}
%
% The option \Lopt{leqno} can be used to get the equation numbers
% on the left side of the equation. It loads code which is generated
% automatically from the kernel files when the format is built.
% If the equation number does get a special formatting then instead
% of using the kernel file the class would need to provide the code
% explicitly.
% \begin{macrocode}
\DeclareOption{leqno}{\input{leqno.clo}}
% \end{macrocode}
%
% \subsection{Flush left displays}
%
% The option \Lopt{fleqn} redefines the displayed math environments
% in such a way that they come out flush left, with an indentation
% of |\mathindent| from the prevailing left margin. It loads
% code which is generated
% automatically from the kernel files when the format is built.
% \changes{v1.0h}{1993/12/18}{Corrected some typos. ASAJ.}
% \begin{macrocode}
\DeclareOption{fleqn}{\input{fleqn.clo}}
% \end{macrocode}
%
% \subsection{Open bibliography}
%
% The option \Lopt{openbib} produces the ``open'' bibliography
% style, in which each block starts on a new line, and succeeding
% lines in a block are indented by |\bibindent|.
% \changes{v1.3k}{1995/08/27}{openbib option reimplemented}
% \begin{macrocode}
\DeclareOption{openbib}{%
% \end{macrocode}
% First some hook into the bibliography environment is filled.
% \begin{macrocode}
\AtEndOfPackage{%
\renewcommand\@openbib@code{%
\advance\leftmargin\bibindent
\itemindent -\bibindent
\listparindent \itemindent
\parsep \z@
}%
% \end{macrocode}
% In addition the definition of |\newblock| is overwritten.
% \begin{macrocode}
\renewcommand\newblock{\par}}%
}
% \end{macrocode}
%
%
% \section{Executing Options}
%
% Here we execute the default options to initialize certain
% variables. Note that the document class `book' always uses two
% sided printing.
% \begin{macrocode}
%<*article>
\ExecuteOptions{letterpaper,10pt,oneside,onecolumn,final}
%</article>
%<*report>
\ExecuteOptions{letterpaper,10pt,oneside,onecolumn,final,openany}
%</report>
%<*book>
\ExecuteOptions{letterpaper,10pt,twoside,onecolumn,final,openright}
%</book>
% \end{macrocode}
%
% The |\ProcessOptions| command causes the execution of the code
% for every option \Lopt{FOO}
% which is declared and for which the user typed
% the \Lopt{FOO} option in his
% |\documentclass| command. For every option \Lopt{BAR} he typed,
% which is not declared, the option is assumed to be a global option.
% All options will be passed as document options to any
% |\usepackage| command in the document preamble.
% \begin{macrocode}
\ProcessOptions
% \end{macrocode}
% Now that all the options have been executed we can load the
% chosen class option file that contains all size dependent code.
% \begin{macrocode}
%<!book>\input{size1\@ptsize.clo}
%<book>\input{bk1\@ptsize.clo}
%</article|report|book>
% \end{macrocode}
%
% \section{Loading Packages}
%
% The standard class files do not load additional packages.
%
%
% \section{Document Layout}
% \label{sec:classes:maincode}
%
% In this section we are finally dealing with the nasty typographical
% details.
%
% \subsection{Fonts}
%
% \LaTeX\ offers the user commands to change the size of the font,
% relative to the `main' size. Each relative size changing command
% |\size| executes the command
% |\@setfontsize||\size|\meta{font-size}\meta{baselineskip} where:
%
% \begin{description}
% \item[\meta{font-size}] The absolute size of the font to use from
% now on.
%
% \item[\meta{baselineskip}] The normal value of |\baselineskip|
% for the size of the font selected. (The actual value will be
% |\baselinestretch| * \meta{baselineskip}.)
% \end{description}
%
% A number of commands, defined in the \LaTeX{} kernel, shorten the
% following definitions and are used throughout. They are:
% \begin{center}
% \begin{tabular}{ll@{\qquad}ll@{\qquad}ll}
% \verb=\@vpt= & 5 & \verb=\@vipt= & 6 & \verb=\@viipt= & 7 \\
% \verb=\@viiipt= & 8 & \verb=\@ixpt= & 9 & \verb=\@xpt= & 10 \\
% \verb=\@xipt= & 10.95 & \verb=\@xiipt= & 12 & \verb=\@xivpt= & 14.4\\
% ...
% \end{tabular}
% \end{center}
%
% \begin{macro}{\normalsize}
% \begin{macro}{\@normalsize}
% \changes{v1.0o}{1994/01/31}{\cs{@normalsize} now defined in the
% kernel}
%
% The user level command for the main size is |\normalsize|.
% Internally \LaTeX{} uses |\@normalsize| when it refers to the
% main size. |\@normalsize| will be defined to work like
% |\normalsize| if the latter is redefined from its default
% definition (that just issues an error message). Otherwise
% |\@normalsize| simply selects a 10pt/12pt size.
%
% The |\normalsize| macro also sets new values for\\
% |\abovedisplayskip|, |\abovedisplayshortskip| and
% |\belowdisplayshortskip|.
%
% \changes{v1.0e}{1993/12/07}{\cs{normalsize} doesn't exist, so use
% \cs{newcommand}}
% \changes{v1.0h}{1993/12/18}{\cs{normalsize} is now defined in the
% kernel, so use \cs{renewcommand}. ASAJ.}
% \begin{macrocode}
%<*10pt|11pt|12pt>
\renewcommand\normalsize{%
%<*10pt>
\@setfontsize\normalsize\@xpt\@xiipt
\abovedisplayskip 10\p@ \@plus2\p@ \@minus5\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6\p@ \@plus3\p@ \@minus3\p@
%</10pt>
%<*11pt>
\@setfontsize\normalsize\@xipt{13.6}%
\abovedisplayskip 11\p@ \@plus3\p@ \@minus6\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6.5\p@ \@plus3.5\p@ \@minus3\p@
%</11pt>
%<*12pt>
\@setfontsize\normalsize\@xiipt{14.5}%
\abovedisplayskip 12\p@ \@plus3\p@ \@minus7\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6.5\p@ \@plus3.5\p@ \@minus3\p@
%</12pt>
% \end{macrocode}
% The |\belowdisplayskip| is always equal to the
% |\abovedisplayskip|. The parameters of the first level list are
% always given by |\@listI|.
% \begin{macrocode}
\belowdisplayskip \abovedisplayskip
\let\@listi\@listI}
% \end{macrocode}
%
% We initially choose the normalsize font.
% \begin{macrocode}
\normalsize
% \end{macrocode}
% We use |\MakeRobust| instead of |\DeclareRobustCommand| above to avoid a log
% entry for the redefinition. But if we are running in in a rollback situation
% (prior to 2015) we don't touch it.
% \changes{v1.4k}{2019/10/25}{Roll back handling (gh/201)}
% \begin{macrocode}
\ifx\MakeRobust\@undefined \else
\MakeRobust\normalsize
\fi
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\small}
% This is similar to |\normalsize|.
% \changes{v1.0h}{1993/12/18}{\cs{small} is now defined in the kernel,
% so use \cs{renewcommand}. ASAJ.}
% \changes{v1.2e}{1994/04/14}{\cs{small} is no longer defined in the
% kernel; use \cs{newcommand}}
% \begin{macrocode}
\DeclareRobustCommand\small{%
%<*10pt>
\@setfontsize\small\@ixpt{11}%
\abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus2\p@
\belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\topsep 4\p@ \@plus2\p@ \@minus2\p@
\parsep 2\p@ \@plus\p@ \@minus\p@
\itemsep \parsep}%
%</10pt>
%<*11pt>
\@setfontsize\small\@xpt\@xiipt
\abovedisplayskip 10\p@ \@plus2\p@ \@minus5\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6\p@ \@plus3\p@ \@minus3\p@
\def\@listi{\leftmargin\leftmargini
\topsep 6\p@ \@plus2\p@ \@minus2\p@
\parsep 3\p@ \@plus2\p@ \@minus\p@
\itemsep \parsep}%
%</11pt>
%<*12pt>
\@setfontsize\small\@xipt{13.6}%
\abovedisplayskip 11\p@ \@plus3\p@ \@minus6\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6.5\p@ \@plus3.5\p@ \@minus3\p@
\def\@listi{\leftmargin\leftmargini
\topsep 9\p@ \@plus3\p@ \@minus5\p@
\parsep 4.5\p@ \@plus2\p@ \@minus\p@
\itemsep \parsep}%
%</12pt>
\belowdisplayskip \abovedisplayskip
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\footnotesize}
% This is similar to |\normalsize|.
% \changes{v1.0h}{1993/12/18}{\cs{footnotesize} is now defined in the
% kernel, so use \cs{renewcommand}. ASAJ.}
% \changes{v1.2e}{1994/04/14}{use \cs{newcommand} again}
% \begin{macrocode}
\DeclareRobustCommand\footnotesize{%
%<*10pt>
\@setfontsize\footnotesize\@viiipt{9.5}%
\abovedisplayskip 6\p@ \@plus2\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus\p@
\belowdisplayshortskip 3\p@ \@plus\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\topsep 3\p@ \@plus\p@ \@minus\p@
\parsep 2\p@ \@plus\p@ \@minus\p@
\itemsep \parsep}%
%</10pt>
%<*11pt>
\@setfontsize\footnotesize\@ixpt{11}%
\abovedisplayskip 8\p@ \@plus2\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus\p@
\belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\topsep 4\p@ \@plus2\p@ \@minus2\p@
\parsep 2\p@ \@plus\p@ \@minus\p@
\itemsep \parsep}%
%</11pt>
%<*12pt>
\@setfontsize\footnotesize\@xpt\@xiipt
\abovedisplayskip 10\p@ \@plus2\p@ \@minus5\p@
\abovedisplayshortskip \z@ \@plus3\p@
\belowdisplayshortskip 6\p@ \@plus3\p@ \@minus3\p@
\def\@listi{\leftmargin\leftmargini
\topsep 6\p@ \@plus2\p@ \@minus2\p@
\parsep 3\p@ \@plus2\p@ \@minus\p@
\itemsep \parsep}%
%</12pt>
\belowdisplayskip \abovedisplayskip
}
%</10pt|11pt|12pt>
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\scriptsize}
% \begin{macro}{\tiny}
% \begin{macro}{\large}
% \begin{macro}{\Large}
% \begin{macro}{\LARGE}
% \begin{macro}{\huge}
% \begin{macro}{\Huge}
% These are all much simpler than the previous macros, they just
% select a new fontsize, but leave the parameters for displays and
% lists alone.
% \changes{v1.0h}{1993/12/18}{These are now defined in the kernel,
% so use \cs{renewcommand}. ASAJ.}
% \changes{v1.2e}{1994/04/14}{use \cs{newcommand} again}
% \begin{macrocode}
%<*10pt>
\DeclareRobustCommand\scriptsize{\@setfontsize\scriptsize\@viipt\@viiipt}
\DeclareRobustCommand\tiny{\@setfontsize\tiny\@vpt\@vipt}
\DeclareRobustCommand\large{\@setfontsize\large\@xiipt{14}}
\DeclareRobustCommand\Large{\@setfontsize\Large\@xivpt{18}}
\DeclareRobustCommand\LARGE{\@setfontsize\LARGE\@xviipt{22}}
\DeclareRobustCommand\huge{\@setfontsize\huge\@xxpt{25}}
\DeclareRobustCommand\Huge{\@setfontsize\Huge\@xxvpt{30}}
%</10pt>
%<*11pt>
\DeclareRobustCommand\scriptsize{\@setfontsize\scriptsize\@viiipt{9.5}}
\DeclareRobustCommand\tiny{\@setfontsize\tiny\@vipt\@viipt}
\DeclareRobustCommand\large{\@setfontsize\large\@xiipt{14}}
\DeclareRobustCommand\Large{\@setfontsize\Large\@xivpt{18}}
\DeclareRobustCommand\LARGE{\@setfontsize\LARGE\@xviipt{22}}
\DeclareRobustCommand\huge{\@setfontsize\huge\@xxpt{25}}
\DeclareRobustCommand\Huge{\@setfontsize\Huge\@xxvpt{30}}
%</11pt>
%<*12pt>
\DeclareRobustCommand\scriptsize{\@setfontsize\scriptsize\@viiipt{9.5}}
\DeclareRobustCommand\tiny{\@setfontsize\tiny\@vipt\@viipt}
\DeclareRobustCommand\large{\@setfontsize\large\@xivpt{18}}
\DeclareRobustCommand\Large{\@setfontsize\Large\@xviipt{22}}
\DeclareRobustCommand\LARGE{\@setfontsize\LARGE\@xxpt{25}}
\DeclareRobustCommand\huge{\@setfontsize\huge\@xxvpt{30}}
\let\Huge=\huge
%</12pt>
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
%
% \subsection{Paragraphing}
%
% \begin{macro}{\lineskip}
% \begin{macro}{\normallineskip}
% These parameters control \TeX's behaviour when two lines tend to
% come too close together.
% \begin{macrocode}
%<*article|report|book>
\setlength\lineskip{1\p@}
\setlength\normallineskip{1\p@}
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\baselinestretch}
% This is used as a multiplier for |\baselineskip|. The default is
% to \emph{not} stretch the baselines. Note that if this command
% doesn't resolve to ``empty'' any \texttt{plus} or \texttt{minus}
% part in the specification of |\baselineskip| is ignored.
% \begin{macrocode}
\renewcommand\baselinestretch{}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\parskip}
% \begin{macro}{\parindent}
% |\parskip| gives extra vertical space between paragraphs and
% |\parindent| is the width of the paragraph indentation. The value
% of |\parindent| depends on whether we are in two column mode.
% \changes{v1.0m}{1994/01/12}{\cs{parindent} should be different,
% depending on the pointsize}
% \begin{macrocode}
\setlength\parskip{0\p@ \@plus \p@}
%</article|report|book>
%<*10pt|11pt|12pt>
\if@twocolumn
\setlength\parindent{1em}
\else
%<10pt> \setlength\parindent{15\p@}
%<11pt> \setlength\parindent{17\p@}
%<12pt> \setlength\parindent{1.5em}
\fi
%</10pt|11pt|12pt>
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\smallskipamount}
% \begin{macro}{\medskipamount}
% \begin{macro}{\bigskipamount}
% The values for these three parameters are set in the \LaTeX\
% kernel. They should perhaps vary, according to the size option
% specified. But as they have always had the same value regardless
% of the size option we do not change them to stay compatible with
% both \LaTeX~2.09 and older releases of \LaTeXe.
% \changes{v1.3n}{1995/10/29}{Added setting the values of
% \cs{...skipamount}}
% \begin{macrocode}
%<*10pt|11pt|12pt>
\setlength\smallskipamount{3\p@ \@plus 1\p@ \@minus 1\p@}
\setlength\medskipamount{6\p@ \@plus 2\p@ \@minus 2\p@}
\setlength\bigskipamount{12\p@ \@plus 4\p@ \@minus 4\p@}
%</10pt|11pt|12pt>
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\@lowpenalty}
% \begin{macro}{\@medpenalty}
% \begin{macro}{\@highpenalty}%
% The commands |\nopagebreak| and |\nolinebreak| put in penalties
% to discourage these breaks at the point they are put in.
% They use |\@lowpenalty|, |\@medpenalty| or |\@highpenalty|,
% dependent on their argument.
% \begin{macrocode}
%<*article|report|book>
\@lowpenalty 51
\@medpenalty 151
\@highpenalty 301
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\clubpenalty}
% \begin{macro}{\widowpenalty}
% These penalties are use to discourage club and widow lines.
% Because we use their default values we only show them here,
% commented out.
% \begin{macrocode}
% \clubpenalty 150
% \widowpenalty 150
% \end{macrocode}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\displaywidowpenalty}
% \begin{macro}{\predisplaypenalty}
% \begin{macro}{\postdisplaypenalty}
% Discourage (but not so much) widows in front of a math display
% and forbid breaking directly in front of a display. Allow break
% after a display without a penalty. Again the default values are
% used, therefore we only show them here.
% \begin{macrocode}
% \displaywidowpenalty 50
% \predisplaypenalty 10000
% \postdisplaypenalty 0
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\interlinepenalty}
% Allow the breaking of a page in the middle of a paragraph.
% \begin{macrocode}
% \interlinepenalty 0
% \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\brokenpenalty}
% We allow the breaking of a page after a hyphenated line.
% \changes{v1.1a}{1994/03/12}{Show correct default which is 100}
% \begin{macrocode}
% \brokenpenalty 100
%</article|report|book>
% \end{macrocode}
% \end{macro}
%
%
% \subsection{Page Layout}
%
% All margin dimensions are measured from a point one inch from the
% top and lefthand side of the page.
%
% \subsubsection{Vertical spacing}
%
% \begin{macro}{\headheight}
% \begin{macro}{\headsep}
% \begin{macro}{\topskip}
% The |\headheight| is the height of the box that will contain the
% running head. The |\headsep| is the distance between the bottom
% of the running head and the top of the text. The |\topskip| is
% the |\baselineskip| for the first line on a page; \LaTeX's output
% routine will not work properly if it has the value 0pt, so do not
% do that!
% \begin{macrocode}
%<*10pt|11pt|12pt>
\setlength\headheight{12\p@}
%<!bk>\setlength\headsep {25\p@}
%<10pt&bk>\setlength\headsep {.25in}
%<11pt&bk>\setlength\headsep {.275in}
%<12pt&bk>\setlength\headsep {.275in}
%<10pt>\setlength\topskip {10\p@}
%<11pt>\setlength\topskip {11\p@}
%<12pt>\setlength\topskip {12\p@}
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macro}{\footskip}
% The distance from the baseline of the box which contains the
% running footer to the baseline of last line of text is controlled
% by the |\footskip|.
% \begin{macrocode}
%<!bk>\setlength\footskip{30\p@}
%<10pt&bk>\setlength\footskip{.35in}
%<11pt&bk>\setlength\footskip{.38in}
%<12pt&bk>\setlength\footskip{30\p@}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\maxdepth}
% \changes{v1.2k}{1994/05/06}{Added setting of \cs{maxdepth} and
% \cs{@maxdepth}}
% \changes{v1.3j}{1995/08/16}{Take setting of
% \cs{@maxdepth} out again}
% The \TeX\ primitive register |\maxdepth| has a function that is
% similar to that of |\topskip|. The register |\@maxdepth| should
% always contain a copy of |\maxdepth|. This is achieved by setting
% it internally at |\begin{document}|. In both plain \TeX\ and
% \LaTeX~2.09 |\maxdepth| had a fixed value of \texttt{4pt}; in
% native \LaTeX2e\ mode we let the value depend on the typesize. We
% set it so that |\maxdepth| $+$ |\topskip| $=$ typesize $\times
% 1.5$. As it happens, in these classes |\topskip| is equal to the
% typesize, therefore we set |\maxdepth| to half the value of
% |\topskip|.
% \begin{macrocode}
\if@compatibility \setlength\maxdepth{4\p@} \else
\setlength\maxdepth{.5\topskip} \fi
% \end{macrocode}
% \end{macro}
%
% \subsubsection{The dimension of text}
%
% \begin{macro}{\textwidth}
% When we are in compatibility mode we have to make sure that the
% dimensions of the printed area are not different from what the
% user was used to see.
%
% \begin{macrocode}
\if@compatibility
\if@twocolumn
\setlength\textwidth{410\p@}
\else
%<10pt&!bk> \setlength\textwidth{345\p@}
%<11pt&!bk> \setlength\textwidth{360\p@}
%<12pt&!bk> \setlength\textwidth{390\p@}
%<10pt&bk> \setlength\textwidth{4.5in}
%<11pt&bk> \setlength\textwidth{5in}
%<12pt&bk> \setlength\textwidth{5in}
\fi
% \end{macrocode}
% When we are not in compatibility mode we can set some of the
% dimensions differently, taking into account the paper size for
% instance.
% \begin{macrocode}
\else
% \end{macrocode}
% First, we calculate the maximum |\textwidth|, which we will allow
% on the selected paper and store it in |\@tempdima|. Then we store
% the length of a line with approximately 60--70 characters in
% |\@tempdimb|. The values given are more or less suitable when
% Computer Modern fonts are used.
% \changes{v1.1a}{1994/03/12}{Have old values for width in native mode}
% \begin{macrocode}
\setlength\@tempdima{\paperwidth}
\addtolength\@tempdima{-2in}
%<10pt> \setlength\@tempdimb{345\p@}
%<11pt> \setlength\@tempdimb{360\p@}
%<12pt> \setlength\@tempdimb{390\p@}
% \end{macrocode}
%
% Now we can set the |\textwidth|, depending on whether we will be
% setting one or two columns.
%
% In two column mode each \emph{column} shouldn't be wider than