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-% \iffalse meta-comment
-%
-% Copyright 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
-% 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
-% http://www.latex-project.org/lppl.txt
-% and version 1.3c or later is part of all distributions of LaTeX
-% version 2005/12/01 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
-%%% From File: ltfloat.dtx
-%
-%<*driver>
-% \fi
-\ProvidesFile{ltfloat.dtx}[2002/10/01 v1.1v LaTeX Kernel (Floats)]
-% \iffalse
-\documentclass{ltxdoc}
-\GetFileInfo{ltfloat.dtx}
-\title{\filename}
-\date{\filedate}
- \author{%
- Johannes Braams\and
- David Carlisle\and
- Alan Jeffrey\and
- Leslie Lamport\and
- Frank Mittelbach\and
- Chris Rowley\and
- Rainer Sch\"opf}
-
-\begin{document}
-\maketitle
- \DocInput{\filename}
-\end{document}
-%</driver>
-% \fi
-%
-% \CheckSum{636}
-%
-% \section{Floats}
-%
-% The different types of floats are identified by a \meta{type} name,
-% which is the name of the counter for that kind of float. For
-% example, figures are of type `figure' and tables are of type `table'.
-% Each \meta{type} has associated a positive \meta{type number}, which
-% is a power of two. E.g.,\\
-% figures might be have type number~1, tables type number~2, programs
-% type number~4, etc.
-%
-% The locations where a float can go are specified by a
-% \meta{placement specifier}, which is a list of the possible
-% locations, each denoted by a letter as follows:
-% \begin{center}
-% \begin{tabular}{l@{ : }l@{ --- }l}
-% h & here & at the current location in the text.\\
-% t & top & at the top of a text page.\\
-% b & bottom & at the bottom of a text page.\\
-% p & page & on a separate float page
-% \end{tabular}
-% \end{center}
-% In addition, in conjunction with these, you can use `!' which means
-% that the current values of the float positioning parameters are
-% ignored for this float. (Has no effect on `p', float page
-% positioning.)
-% For example, `pht' specifies that the float can appear in any of
-% three locations: page, here or top.
-%
-% \StopEventually{}
-%
-%
-% \changes{v1.0a}{1994/03/04}{Initial version, split from latex.dtx}
-% \changes{v1.0b}{1994/03/28}{Split further from ltherest.dtx}
-% \changes{v1.0e}{1994/04/25}{Changed warning messages}
-% \changes{v1.0e}{1994/04/25}{Removed obsolete tracing code}
-% \changes{v1.0f}{1994/05/03}
-% {(CAR) Added \cs{@largefloatcheck}}
-% \changes{v1.0f}{1994/05/03}{Removed unnecessary braces from
-% arguments of \cs{@ifnextchar}}
-% \changes{v1.0i}{1994/05/22}{Use new warning commands}
-% \changes{v1.1e}{1994/11/17}
-% {\cs{@tempa} to \cs{reserved@a}}
-% \changes{v1.1g}{1994/12/10}{Some temps reinserted temporarily}
-% \changes{v1.1n}{1995/11/28}{documentation fixes}
-% \changes{v1.1s}{1997/06/16}{documentation fixes}
-%
-% \subsection{Floating Environments}
-% \begin{macrocode}
-%<*2ekernel>
-\message{floats,}
-% \end{macrocode}
-% \begin{oldcomments}
-%
-% Where floats may appear on a page, and how many may appear there
-% are specified by the following float placement parameters. The
-% numbers are named like counters so the user can set them with
-% the ordinary counter-setting commands.
-%
-% \c@topnumber : Number of floats allowed at the top of a column.
-% \topfraction : Fraction of column that can be devoted to floats.
-% \c@dbltopnumber, \dbltopfraction
-% : Same as above, but for double-column floats.
-% \c@bottomnumber, \bottomfraction
-% : Same as above for bottom of page.
-% \c@totalnumber : Number of floats allowed in a single column,
-% including in-text floats.
-% \textfraction :Minimum fraction of column that must contain text.
-% \floatpagefraction: Minimum fraction of page that must be taken
-% up by float page.
-% \dblfloatpagefraction
-% : Same as above, for double-column floats.
-%
-% The document style must define the following.
-%
-% \fps@TYPE : The default placement specifier for floats of type
-% TYPE.
-%
-% \ftype@TYPE : The type number for floats of type TYPE.
-%
-% \ext@TYPE : The file extension indicating the file on which the
-% contents list for float type TYPE is stored.
-% For example, \ext@figure = 'lof'.
-%
-% \fnum@TYPE : A macro to generate the figure number for a caption.
-% For example, \fnum@TYPE == Figure \thefigure.
-%
-% \@makecaption{NUM}{TEXT} :
-% A macro to make a caption, with NUM the value
-% produced by \fnum@... and TEXT the text of the caption.
-% It can assume it's in a \parbox of the appropriate width.
-%
-% \@float{TYPE}[PLACEMENT] : This macro begins a float environment for a
-% single-column float of type TYPE with PLACEMENT as the placement
-% specifier. The default value of PLACEMENT is defined by
-% \fps@TYPE. The environment is ended by \end@float.
-% E.g., \figure == \@float{figure}, \endfigure == \end@float.
-%
-% \@float{TYPE}[PLACEMENT] ==
-% BEGIN
-% if hmode then \@bsphack
-% \@floatpenalty := -10002
-% else \@floatpenalty := -10003
-% fi
-% \@captype ==L TYPE
-% \@dblflset
-% \@fps ==L PLACEMENT
-% \@onelevel@sanitize \@fps
-% add default PLACEMENT if at most ! in PLACEMENT == \@fpsadddefault
-% if inner
-% then LaTeX Error: 'Not in outer paragraph mode.'
-% \@floatpenalty := 0
-% else if \@freelist nonempty
-% then \@currbox :=L head of \@freelist
-% \@freelist :=G tail of \@freelist
-% \count\@currbox :=G 32*\ftype@TYPE +
-% bits determined by PLACEMENT
-% else \@floatpenalty := 0
-% LaTeX Error: 'Too many unprocessed floats'
-% fi
-% fi
-% \@currbox :=G \color@vbox
-% \normalcolor
-% \vbox{
-% %% 15 Dec 87 --
-% %% removed \boxmaxdepth :=L 0pt
-% %% that made box 0 depth because it screwed
-% %% things up. Instead, added \vskip0pt at end
-% \hsize = \columnwidth
-% \@parboxrestore
-% \@floatboxreset
-% END
-%
-% \caption ==
-% BEGIN
-% \refstepcounter{\@captype}
-% \@dblarg{\@caption{\@captype}}
-% END
-%
-% In following definition, \par moved from after \addcontentsline to
-% before \addcontentsline because the \write could cause
-% an extra blank line to be added to the paragraph above the
-% caption. (Change made 12 Jun 87)
-%
-% \@caption{TYPE}[STEXT]{TEXT} ==
-% BEGIN
-% \par
-% \addcontentsline{\ext@TYPE}{TYPE}{\numberline{\theTYPE}{STEXT}}
-% \begingroup
-% \@parboxrestore
-% \@normalsize
-% \@makecaption{\fnum@TYPE}{TEXT}
-% \par
-% \endgroup
-% END
-%
-%
-% \@dblfloat{TYPE}[PLACEMENT] : Macro to begin a float environment for
-% a double-column float of type TYPE with PLACEMENT as the placement
-% specifier. The default value of PLACEMENT is 'tp'
-% The environment is ended by \end@dblfloat.
-% E.g., \figure* == \@dblfloat{figure},
-% \endfigure* == \end@dblfloat.
-%
-% \@dblfloat{TYPE}[PLACEMENT] ==
-% Identical to \@float{TYPE}[PLACEMENT] except \hsize and \linewidth
-% are set to \textwidth.
-% \end{oldcomments}
-%
-% \begin{macro}{\@floatpenalty}
-% \begin{macrocode}
-\newcount\@floatpenalty
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\caption}
-%
-% This is set to be an error message outside a float since no
-% captype is defined there; this may need to be changed by some
-% classes.
-% \changes{v1.1u}{1999/04/19}
-% {Made caption an error oustside a float: latex/2815}
-% \begin{macrocode}
-\def\caption{%
- \ifx\@captype\@undefined
- \@latex@error{\noexpand\caption outside float}\@ehd
- \expandafter\@gobble
- \else
- \refstepcounter\@captype
- \expandafter\@firstofone
- \fi
- {\@dblarg{\@caption\@captype}}%
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@caption}
-% \changes{v1.0b}{1994/03/28}
-% {Use \cs{normalsize} not \cs{@normalsize}}
-% \changes{v1.1r}{1996/12/06}
-% {Call \cs{@setminpage} if needed. latex/2318}
-% \begin{macrocode}
-\long\def\@caption#1[#2]#3{%
- \par
- \addcontentsline{\csname ext@#1\endcsname}{#1}%
- {\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
- \begingroup
-% \end{macrocode}
-%
-% The paragraph setting parameters are normalised at this point, however
-% |\@parboxrestore| resets |\everypar| which is not correct in this
-% context so |\@setminipage| is called if needed.
-%
-% The float mechanism, like minipage, sets the flag |@minipage| true
-% before executing the user-supplied text. Many \LaTeX\ constructs
-% test for this flag and do not add vertical space when it is true.
-% The intention is that this emulates \TeX's `top of page' behaviour.
-% The flag must be set false at the start of the first paragraph. This
-% is achieved by a redefinition of |\everypar|, but the call to
-% |\@parboxrestore| removes that redefinition, so it is re-inserted
-% if needed. If the flag is already false then the |\caption| was not
-% the first entry in the float, and so some other paragraph has already
-% activated the special |\everypar|. In this case no further action is
-% needed.
-% \begin{macrocode}
- \@parboxrestore
- \if@minipage
- \@setminipage
- \fi
-% \end{macrocode}
-%
-% \begin{macrocode}
- \normalsize
- \@makecaption{\csname fnum@#1\endcsname}{\ignorespaces #3}\par
- \endgroup}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@float}
-% \begin{macro}{\@dblflset}
-% \changes{v1.1a}{1994/10/31}{Macro added}
-% \changes{v1.1g}{1994/12/10}{Macro removed temporarily}
-% \changes{v1.1a}{1994/10/31}
-% {Major changes to parameter parsing, setting of local variables,
-% etc; two-column and one-column cases merged; space hacks moved}
-% \changes{v1.1c}{1994/11/05}
-% {Add compatibility with old version of \cs{@xfloat}.}
-% \changes{v1.1g}{1994/12/10}{Old version reinstated temporarily}
-%
-% \begin{macrocode}
-\def\@float#1{%
- \@ifnextchar[%
- {\@xfloat{#1}}%
- {\edef\reserved@a{\noexpand\@xfloat{#1}[\csname fps@#1\endcsname]}%
- \reserved@a}}
-% \end{macrocode}
-%
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\@dblfloat}
-% \changes{v1.1a}{1994/10/31}
-% {Major changes since two-column and one-column cases merged}
-% \changes{v1.1g}{1994/12/10}{Old version reinstated temporarily}
-%
-% \begin{macrocode}
-\def\@dblfloat{%
- \if@twocolumn\let\reserved@a\@dbflt\else\let\reserved@a\@float\fi
- \reserved@a}
-% \end{macrocode}
-% \end{macro}
-%
-%
-% \begin{macro}{\fps@dbl}
-% \changes{v1.1a}{1994/10/31}{Macro added}
-% \changes{v1.1g}{1994/12/10}{Macro removed temporarily}
-% Note that all double floats have default fps `tp'.
-% \end{macro}
-%
-% \begin{macro}{\@setfps}
-% \changes{v1.1a}{1994/10/31}{Macro added}
-% \changes{v1.1c}{1994/11/05}
-% {Add compatibility with old version of \cs{@xfloat}.}
-% \changes{v1.1g}{1994/12/10}{Macro removed temporarily}
-% This sets the fps, dealing with error conditions by adding
-% the default.
-%
-% \end{macro}
-%
-% \begin{macro}{\@xfloat}
-% \changes{LaTeX2e}{1993/12/05}{Command changed}
-% \changes{LaTeX2e}{1994/01/21}{Added missing percent characters.}
-% \changes{v1.1a}{1994/10/31}
-% {Major changes, removing setting of local variables, space hacks
-% etc; two-column and one-column cases merged}
-% \changes{v1.1c}{1994/11/05}
-% {Add compatibility with old version of \cs{@xfloat}: but the
-% arguments, provided at exorbitant cost, are now completely
-% ignored}
-% \changes{v1.1f}{1994/11/21}
-% {Missing percents reinserted after 4, 8: these are not numbers.}
-% \changes{v1.1g}{1994/12/10}{Old version reinstated temporarily}
-% \changes{v1.1g}{1994/12/10}{Sanitisation added temporarily}
-% The first part of this sets the count register that stores all
-% the information about the type and fps of the float.
-%
-% We assume here that the default specifiers already contain no
-% active characters.
-%
-% It may be better to store the defaults as numbers, rather than
-% symbol strings.
-%
-% \changes{v1.1p}{1996/10/24}{Added \cs{@nodocument} to trap
-% floats in the preamble}
-% \begin{macrocode}
-\def\@xfloat #1[#2]{%
- \@nodocument
- \def \@captype {#1}%
- \def \@fps {#2}%
- \@onelevel@sanitize \@fps
- \def \reserved@b {!}%
- \ifx \reserved@b \@fps
- \@fpsadddefault
- \else
- \ifx \@fps \@empty
- \@fpsadddefault
- \fi
- \fi
- \ifhmode
- \@bsphack
- \@floatpenalty -\@Mii
- \else
- \@floatpenalty-\@Miii
- \fi
- \ifinner
- \@parmoderr\@floatpenalty\z@
- \else
- \@next\@currbox\@freelist
- {%
- \@tempcnta \sixt@@n
- \expandafter \@tfor \expandafter \reserved@a
- \expandafter :\expandafter =\@fps
- \do
- {%
- \if \reserved@a h%
- \ifodd \@tempcnta
- \else
- \advance \@tempcnta \@ne
- \fi
- \fi
- \if \reserved@a t%
- \@setfpsbit \tw@
- \fi
- \if \reserved@a b%
- \@setfpsbit 4%
- \fi
- \if \reserved@a p%
- \@setfpsbit 8%
- \fi
- \if \reserved@a !%
- \ifnum \@tempcnta>15
- \advance\@tempcnta -\sixt@@n\relax
- \fi
- \fi
- }%
- \@tempcntb \csname ftype@\@captype \endcsname
- \multiply \@tempcntb \@xxxii
- \advance \@tempcnta \@tempcntb
- \global \count\@currbox \@tempcnta
- }%
- \@fltovf
- \fi
-% \end{macrocode}
-% The remainder sets up the box in which the float is typeset, and
-% the typesetting environment to be used. It is essential to have
-% the extra box to avoid the unwanted space that would otherwise
-% often be put at the top of the float.
-%
-% It ends with a hook; not sure how useful this is but it is needed
-% at present to deal with double-column floats.
-% \task{CAR?}{Sort out hooks}
-% \changes{v1.0a}{1994/03/07}
-% {(DPC) Extra group for colour}
-% \changes{v1.0c}{1994/03/14}
-% {(DPC) Use \cs{color@begingroup}}
-% \changes{v1.0g}{1994/05/13}
-% {(DPC) Use \cs{normalcolor}}
-% \changes{v1.1a}{1994/10/31}
-% {(DPC/CAR) Extra box added to remove colour resetting from vmode}
-% \changes{v1.1a}{1994/10/31}{Reset hook added}
-% \changes{v1.1c}{1994/11/05}
-% {Use new \cs{color@hbox} concept.}
-% \changes{v1.1f}{1994/11/21}
-% {Changed to \cs{color@vbox} so that large floats overflow
-% at the bottom}
-% \changes{v1.1f}{1994/11/21}{Use \cs{@setnobreak}}
-% \changes{v1.1f}{1994/11/21}{Added \cs{@setminipage}}
-% \changes{v1.1f}{1994/11/21}{Added resetting of size and font}
-% \changes{v1.1m}{1995/05/25}{(CAR) Resettings moved to hook}
-% \begin{macrocode}
- \global \setbox\@currbox
- \color@vbox
- \normalcolor
- \vbox \bgroup
- \hsize\columnwidth
- \@parboxrestore
- \@floatboxreset
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@floatboxreset}
-% \changes{v1.1a}{1994/10/31}{Macro added}
-%
-% The rational for allowing these normally global flags to be set
-% locally here, via |\@parboxrestore|, was stated originally by
-% Donald Arseneau and extended by Chris Rowley.
-% It is because these flags are only set globally to
-% true by section commands, and these should never appear within
-% marginals or floats or, indeed, in any group; and they are only ever
-% set globally to false when they are definitely true.
-%
-% If anyone is unhappy with this argument then both flags should be
-% treated as in |\set@nobreak|; otherwise this command will be
-% redundant.
-% \changes{v1.1p}{1996/10/24}
-% {Added local settings of flags: dangerous!!}
-% \begin{macrocode}
-\def \@floatboxreset {%
- \reset@font
- \normalsize
- \@setminipage
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@setnobreak}
-% \changes{v1.1f}{1994/11/21}{Macro added}
-% \changes{v1.1n}{1996/07/26}{remove unecessary \cs{global} before
-% \cs{@nobreak...}}
-% \begin{macrocode}
-\def \@setnobreak{%
- \if@nobreak
- \let\outer@nobreak\@nobreaktrue
- \@nobreakfalse
- \fi
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@setminipage}
-% \changes{v1.1f}{1994/11/21}{Macro added}
-% \changes{v1.1n}{1996/07/26}{remove unecessary \cs{global} before
-% \cs{@minipage...}}
-% \begin{macrocode}
-\def \@setminipage{%
- \@minipagetrue
- \everypar{\@minipagefalse\everypar{}}%
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\end@float}
-% \changes{v1.0f}{1994/05/03}
-% {(CAR) Added \cs{@largefloatcheck}}
-% \changes{v1.1n}{1995/10/25}{(CAR) unify code for double and
-% single versions}
-% \begin{macrocode}
-\def\end@float{%
- \@endfloatbox
- \ifnum\@floatpenalty <\z@
-% \end{macrocode}
-% We make sure that we never exceed |\textheight|, otherwise float
-% will never get typeset (91/03/15 FMi).
-% \begin{macrocode}
- \@largefloatcheck
- \@cons\@currlist\@currbox
- \ifnum\@floatpenalty <-\@Mii
- \penalty -\@Miv
-% \end{macrocode}
-% Saving and restoring |\prevdepth| added 26 May 87 to prevent extra
-% vertical space when used in vertical mode.
-% \begin{macrocode}
- \@tempdima\prevdepth
- \vbox{}%
- \prevdepth\@tempdima
-% \end{macrocode}
-%
-% \begin{macrocode}
- \penalty\@floatpenalty
-% \end{macrocode}
-% \changes{LaTeX2.09}{1992/03/18}
-% {(RmS) changed \cs{@esphack} to \cs{@Esphack}}
-% \begin{macrocode}
- \else
- \vadjust{\penalty -\@Miv \vbox{}\penalty\@floatpenalty}\@Esphack
- \fi
- \fi
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\end@dblfloat}
-% \changes{v1.0f}{1994/05/03}{\cs{@largefloatcheck} added}
-% \changes{v1.1n}{1995/10/25}{(CAR) unify code for double and
-% single versions}
-% \begin{macrocode}
-\def\end@dblfloat{%
-\if@twocolumn
- \@endfloatbox
- \ifnum\@floatpenalty <\z@
-% \end{macrocode}
-% We make sure that we never exceed |\textheight|, otherwise float
-% will never get typeset (91/03/15 FMi).
-% \begin{macrocode}
- \@largefloatcheck
- \@cons\@dbldeferlist\@currbox
- \fi
-% \end{macrocode}
-% RmS 92/03/18 changed |\@esphack| to |\@Esphack|.
-% \begin{macrocode}
- \ifnum \@floatpenalty =-\@Mii \@Esphack\fi
-\else
- \end@float
-\fi
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@endfloatbox}
-% \changes{v1.1n}{1995/10/25}{(CAR) macro added: to unify code for
-% double and single versions}
-% This macro is not intended to be a hook; it is designed to help
-% maintain the integrity of this code, which is used twice and, as
-% can be seen, is subject to frequent changes.
-% \begin{macrocode}
-\def \@endfloatbox{%
- \par\vskip\z@skip %% \par\vskip\z@ added 15 Dec 87
-% \end{macrocode}
-% \changes{v1.0a}
-% {1994/03/07}{(DPC) Extra group for colour}
-% \changes{v1.0c}{1994/03/14}
-% {(DPC) Use \cs{color@endgroup}}
-% \changes{v1.0h}{1994/05/20}{Restore outer value of @nobreak switch.}
-% \changes{v1.1a}{1994/10/31}
-% {(DPC/CAR) Extra box added to remove colour resetting from vmode}
-% \changes{v1.1c}{1994/11/05}
-% {Use new \cs{color@hbox} concept.}
-% \changes{v1.1f}{1994/11/21}{Corrected position of \cs{outer@nobreak}}
-% \changes{v1.1f}{1994/11/21}{Added reset of minipage flag}
-% \changes{v1.1n}{1996/07/26}{remove unecessary \cs{global} before
-% \cs{@minipage...}}
-% \begin{macrocode}
- \@minipagefalse
- \outer@nobreak
- \egroup %% end of vbox
- \color@endbox
-}
-%
-% \begin{macro}{\outer@nobreak}
-% \changes{v1.0h}{1994/05/20}{Macro added: default is to do nothing.}
-% \begin{macrocode}
-\let\outer@nobreak\@empty
-% \end{macrocode}
-% \end{macro}
-%
-%
-% \begin{macro}{\@largefloatcheck}
-% \changes{v1.0e}{1994/04/25}{Command added}
-%
-% This calculates by how much a float is oversize for the page and
-% prints this in a warning message.
-%
-% \begin{macrocode}
-\def \@largefloatcheck{%
- \ifdim \ht\@currbox>\textheight
- \@tempdima -\textheight
- \advance \@tempdima \ht\@currbox
-% \end{macrocode}
-% \changes{v1.0e}{1994/04/25}{Changed warning message to give more
-% info}
-% \begin{macrocode}
- \@latex@warning {Float too large for page by \the\@tempdima}%
- \ht\@currbox \textheight
- \fi
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@dbflt}
-% \begin{macro}{\@xdblfloat}
-% \changes{v1.1a}{1994/10/31}
-% {Macros removed: \cs{@dbflt}, \cs{@xdblfloat}}
-% \changes{v1.1g}{1994/12/10}{Macros reinserted temporarily}
-%
-%
-% \begin{macrocode}
-\def\@dbflt#1{\@ifnextchar[{\@xdblfloat{#1}}{\@xdblfloat{#1}[tp]}}
-\def\@xdblfloat#1[#2]{%
- \@xfloat{#1}[#2]\hsize\textwidth\linewidth\textwidth}
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-%
-% Moved to ltoutput 93/12/16
-% \begin{macrocode}
-%\newcount\c@topnumber
-%\newcount\c@dbltopnumber
-%\newcount\c@bottomnumber
-%\newcount\c@totalnumber
-% \end{macrocode}
-%
-% An analysis of |\@floatplacement|:
-%
-% This should be called whenever |\@colht| has been set.
-% \begin{macrocode}
-\def\@floatplacement{\global\@topnum\c@topnumber
- % Textpage bit, global:
- \global\@toproom \topfraction\@colht
- \global\@botnum \c@bottomnumber
- \global\@botroom \bottomfraction\@colht
- \global\@colnum \c@totalnumber
- % Floatpage bit, local:
- \@fpmin \floatpagefraction\@colht}
-% \end{macrocode}
-%
-% \begin{macro}{\@dblfloatplacement}
-% \changes{LaTeX2e}{1993/12/05}{Command changed}
-%
-% This should be called only within a group. Now changed to
-% provide extra checks in |\@addtodblcol|, needed when processing a
-% BANG float.
-%
-% \begin{macrocode}
-\def \@dblfloatplacement {%
-% \end{macrocode}
-% Textpage bit: global, but need not be.
-% \begin{macrocode}
- \global \@dbltopnum \c@dbltopnumber
- \global \@dbltoproom \dbltopfraction\@colht
-% \end{macrocode}
-% This new bit uses |\@textmin| to locally store the amount of extra
-% room in the column.
-% \begin{macrocode}
- \@textmin \@colht
- \advance \@textmin -\@dbltoproom
-% \end{macrocode}
-% Floatpage bit: must be local.
-% \begin{macrocode}
- \@fpmin \dblfloatpagefraction\textheight
- \@fptop \@dblfptop
- \@fpsep \@dblfpsep
- \@fpbot \@dblfpbot
-}
-% \end{macrocode}
-% \end{macro}
-%
-%
-% \begin{oldcomments}
-% MARGINAL NOTES:
-%
-% Marginal notes use the same mechanism as floats to communicate
-% with the \output routine. Marginal notes are distinguished from
-% floats by having a negative placement specification. The command
-% \marginpar [LTEXT]{RTEXT} generates a marginal note in a parbox,
-% using LTEXT if it's on the left and RTEXT if it's on the right.
-% (Default is RTEXT = LTEXT.) It uses the following parameters.
-%
-% \marginparwidth : Width of marginal notes.
-% \marginparsep : Distance between marginal note and text.
-% the page layout to determine how to move the marginal
-% note into the margin. E.g., \@leftmarginskip ==
-% \hskip -\marginparwidth \hskip -\marginparsep .
-% \marginparpush : Minimum vertical separation between \marginpar's
-%
-% Marginal notes are normally put on the outside of the page
-% if @mparswitch = true, and on the right if @mparswitch = false.
-% The command \reversemarginpar reverses the side where they
-% are put. \normalmarginpar undoes \reversemarginpar.
-% These commands have no effect for two-column output.
-%
-% SURPRISE: if two marginal notes appear on the same line of
-% text, then the second one could appear on the next page, in
-% a funny position.
-%
-%
-% \marginpar [LTEXT]{RTEXT} ==
-% BEGIN
-% if hmode then \@bsphack
-% \@floatpenalty := -10002
-% else \@floatpenalty := -10003
-% fi
-% if inner
-% then LaTeX Error: 'Not in outer paragraph mode.'
-% \@floatpenalty := 0
-% else if \@freelist has two elements:
-% then get \@marbox, \@currbox from \@freelist
-% \count\@marbox :=G -1
-% else \@floatpenalty := 0
-% LaTeX Error: 'Too many unprocessed floats'
-% \@currbox, \@marbox := \@tempboxa %%use \def
-% fi
-% fi
-% if optional argument
-% then %% \@xmpar ==
-% \@savemarbox\@marbox{LTEXT}
-% \@savemarbox\@currbox{RTEXT}
-% else %% \@ympar ==
-% \@savemarbox\@marbox{RTEXT}
-% \box\@currbox :=G \box\@marbox
-% fi
-% \@xympar
-% END
-%
-% \reversemarginpar == BEGIN \@mparbottom :=G 0
-% @reversemargin :=G true
-% END
-%
-% \normalmarginpar == BEGIN \@mparbottom :=G 0
-% @reversemargin :=G false
-% END
-%
-% \end{oldcomments}
-%
-% \begin{macro}{\marginpar}
-% \begin{macrocode}
-\def\marginpar{%
- \ifhmode
- \@bsphack
- \@floatpenalty -\@Mii
- \else
- \@floatpenalty-\@Miii
- \fi
- \ifinner
- \@parmoderr
- \@floatpenalty\z@
- \else
- \@next\@currbox\@freelist{}{}%
- \@next\@marbox\@freelist{\global\count\@marbox\m@ne}%
- {\@floatpenalty\z@
- \@fltovf\def\@currbox{\@tempboxa}\def\@marbox{\@tempboxa}}%
- \fi
- \@ifnextchar [\@xmpar\@ympar}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@xmpar}
-% \begin{macrocode}
-\long\def\@xmpar[#1]#2{%
- \@savemarbox\@marbox{#1}%
- \@savemarbox\@currbox{#2}%
- \@xympar}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@ympar}
-% \begin{macrocode}
-\long\def\@ympar#1{%
- \@savemarbox\@marbox{#1}%
- \global\setbox\@currbox\copy\@marbox
- \@xympar}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@savemarbox}
-% \changes{v1.0b}{1994/03/12}
-% {(DPC) Extra group for colour}
-% \changes{v1.0c}{1994/03/14}
-% {(DPC) Use \cs{color@begingroup}}
-% \changes{v1.0d}{1994/04/18}
-% {(DPC) Remove Colour support}
-% \changes{v1.1a}{1994/10/31}
-% {(DPC/CAR) Extra box added for colour}
-% \changes{v1.1c}{1994/11/05}
-% {Use new \cs{color@hbox} concept.}
-% \changes{v1.1f}{1994/11/21}{Changed to \cs{color@vbox} }
-% \changes{v1.1f}{1994/11/21}{Use \cs{@setnobreak} etc}
-% \changes{v1.1f}{1994/11/21}{Added \cs{@setminipage} etc}
-% \changes{v1.1f}{1994/11/21}{Added resetting of size and font}
-% \changes{v1.1m}{1995/05/25}{(CAR) Resettings moved to hook}
-% \changes{v1.1n}{1996/07/26}{remove unecessary \cs{global} before
-% \cs{@minipage...}}
-% \begin{macrocode}
-\long\def \@savemarbox #1#2{%
- \global\setbox #1%
- \color@vbox
- \vtop{%
- \hsize\marginparwidth
- \@parboxrestore
- \@marginparreset
- #2%
- \@minipagefalse
- \outer@nobreak
- }%
- \color@endbox
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@marginparreset}
-% \changes{v1.1f}{1994/11/21}{Macro added}
-%
-% The rational for allowing these normally global flags to be set
-% locally here, via |\@parboxrestore| was stated originally by
-% Donald Arsenau and extended by Chris Rowley.
-% It is because these flags are only set globally to
-% true by section commands, and these should never appear within
-% marginals or floats or, indeed, in any group; and they are only ever
-% set globally to false when they are definitely true.
-%
-% If anyone is unhappy with this argument then both flags should be
-% treated as in |\set@nobreak|; otherwise this command will be
-% redundant.
-% \changes{v1.1p}{1996/10/24}
-% {Added local settings of flags: dangerous!!}
-% \begin{macrocode}
-\def \@marginparreset {%
- \reset@font
- \normalsize
-% \let\if@nobreak\iffalse
-% \let\if@noskipsec\iffalse
-% \@setnobreak
- \@setminipage
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@xympar}
-% \begin{macrocode}
-% \end{macrocode}
-% \changes{LaTeX2.09}{1992/03/18}
-% {(RmS) added \cs{global}\cs{@ignorefalse}}
-% \changes{v1.0b}{1994/03/12}
-% {(DPC) Extra bgroup for colour}
-% \changes{1.0c}{1994/03/14}
-% {(DPC) Use \cs{color@begingroup}}
-% \changes{v1.1a}{1994/10/31}
-% {(DPC/CAR) Extra box added since needed for floats}
-% \changes{v1.1c}{1994/11/05}
-% {Use new \cs{color@hbox} concept.}
-% \changes{v1.1f}{1994/11/21}{Changed to \cs{color@vbox} }
-% Setting the box here is done only because the code
-% uses \cs{end@float}; it will be empty and gets discarded.
-% \changes{v1.1o}{1996/08/02}{Remove \cs{global} before \cs{@ignore...}}
-% \begin{macrocode}
-\def \@xympar{%
- \ifnum\@floatpenalty <\z@\@cons\@currlist\@marbox\fi
- \setbox\@tempboxa
- \color@vbox
- \vbox \bgroup
- \end@float
- \@ignorefalse
- \@esphack
-}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\reversemarginpar}
-% \begin{macro}{\normalmarginpar}
-% \begin{macrocode}
-\def\reversemarginpar{\global\@mparbottom\z@ \@reversemargintrue}
-\def\normalmarginpar{\global\@mparbottom\z@ \@reversemarginfalse}
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-\message{footnotes,}
-% \end{macrocode}
-%
-% \subsection{Footnotes}
-%
-% \begin{oldcomments}
-%
-% \footnote{NOTE} : User command to insert a footnote.
-%
-% \footnote[NUM]{NOTE}: User command to insert a footnote numbered
-% NUM, where NUM is a number -- 1, 2,
-% etc. For example, if footnotes are numbered
-% *, **, etc. within pages, then \footnote[2]{...}
-% produces footnote '**'. This command does not
-% step the footnote counter.
-%
-% \footnotemark[NUM] : Command to produce just the footnote mark in
-% the text, but no footnote. With no argument,
-% it steps the footnote counter before generating
-% the mark.
-%
-% \footnotetext[NUM]{TEXT} : Command to produce the footnote but
-% no mark. \footnote is equivalent to
-% \footnotemark \footnotetext .
-%
-% As in PLAIN, footnotes use \insert\footins, and the following
-% parameters:
-%
-% \footnotesize : Size-changing command for footnotes.
-%
-% \footnotesep : The height of a strut placed at the beginning of
-% every footnote.
-% \skip\footins : Space between main text and footnotes. The rule
-% separating footnotes from text occurs in this
-% space. This space lies above the strut of height
-% \footnotesep which is at the beginning of the
-% first footnote.
-% \footnoterule : Macro to draw the rule separating footnotes from
-% text. It is executed right after a \vspace of
-% \skip\footins. It should take zero vertical
-% space--i.e., it should to a negative skip to
-% compensate for any positive space it occupies.
-% (See PLAIN.TEX.)
-%
-% \interfootnotelinepenalty : Interline penalty for footnotes.
-%
-% \thefootnote : In usual LaTeX style, produces the footnote number.
-% If footnotes are to be numbered within pages, then
-% the document style file must include an \@addtoreset
-% command to cause the footnote counter to be reset
-% when the page counter is stepped. This is not a good
-% idea, though, because the counter will not always be
-% reset in time to ensure that the first footnote on a
-% page is footnote number one.
-%
-% \@thefnmark : Holds the current footnote's mark--e.g., \dag or '1'
-% or 'a'.
-%
-% \@mpfnnumber : A macro that generates the numbers for \footnote
-% and \footnotemark commands. It == \thefootnote
-% outside a minipage environment, but can be
-% changed inside to generate numbers for
-% \footnote's.
-%
-% \@makefnmark : A macro to generate the footnote marker from
-% \@thefnmark The default definition was
-% \hbox{$^\@thefnmark$}.
-%
-% This is now replaced by
-% \textsuperscript{\@thefnmark}
-%
-% \@makefntext{NOTE} :
-% Must produce the actual footnote, using \@thefnmark as the mark
-% of the footnote and NOTE as the text. It is called when
-% effectively inside a \parbox, with \hsize = \columnwidth.
-% For example, it might be as simple as
-% $^{\@thefnmark}$ NOTE
-%
-% In a minipage environment, \footnote and \footnotetext are redefined
-% so that
-% (a) they use the counter mpfootnote
-% (b) the footnotes they produce go at the bottom of the minipage.
-% The switch is accomplished by letting \@mpfn == footnote or mpfootnote
-% and \thempfn == \thefootnote or \thempfootnote, and by redefining
-% \@footnotetext to be \@mpfootnotetext in the minipage.
-%
-% \footnote{NOTE} ==
-% BEGIN
-% \stepcounter{\@mpfn}
-% begingroup
-% \protect == \noexpand
-% \@thefnmark :=G eval (\thempfn)
-% endgroup
-% \@footnotemark
-% \@footnotetext{NOTE}
-% END
-%
-% \footnote[NUM]{NOTE} ==
-% BEGIN
-% begingroup
-% \protect == \noexpand
-% counter \@mpfn :=L NUM
-% \@thefnmark :=G eval (\thempfn)
-% endgroup
-% \@footnotemark
-% \@footnotetext{NOTE}
-% END
-%
-% \footnotemark ==
-% BEGIN \stepcounter{footnote}
-% begingroup
-% \protect == \noexpand
-% \@thefnmark :=G eval(\thefootnote)
-% endgroup
-% \@footnotemark
-% END
-%
-% \footnotemark[NUM] ==
-% BEGIN
-% begingroup
-% footnote counter :=L NUM
-% \protect == \noexpand
-% \@thefnmark :=G eval(\thefootnote)
-% endgroup
-% \@footnotemark
-% END
-%
-% \@footnotemark ==
-% BEGIN
-% \leavevmode
-% IF hmode THEN \@x@sf := \the\spacefactor FI
-% \@makefnmark % put number in main text
-% IF hmode THEN \spacefactor := \@x@sf FI
-% END
-%
-% \footnotetext ==
-% BEGIN begingroup \protect == \noexpand
-% \@thefnmark :=G eval (\thempfn)
-% endgroup
-% \@footnotetext
-% END
-%
-% \footnotetext[NUM] ==
-% BEGIN begingroup counter \@mpfn :=L NUM
-% \protect == \noexpand
-% \@thefnmark :=G eval (\thempfn)
-% endgroup
-% \@footnotetext
-% END
-%
-% \end{oldcomments}
-%
-%
-% \changes{v1.1l}{1995/05/24}{Moved definition of \cs{footins}
-% and \cs{footnoterule} from ltplain.}
-%
-% \begin{macro}{\footins}
-% \LaTeX\ does use the same insert for footnotes as PLAIN.
-% \begin{macrocode}
-\newinsert\footins
-% \end{macrocode}
-%
-% \LaTeX\ leaves these initializations for the |\footins| insert.
-%
-% \begin{macrocode}
-\skip\footins=\bigskipamount % space added when footnote is present
-\count\footins=1000 % footnote magnification factor (1 to 1)
-\dimen\footins=8in % maximum footnotes per page
-% \end{macrocode}
-% \end{macro}
-%
-%
-% \begin{macro}{\footnoterule}
-% \LaTeX\ keeps PLAIN \TeX's |\footnoterule| as the default.
-%
-% \begin{macrocode}
-\def\footnoterule{\kern-3\p@
- \hrule \@width 2in \kern 2.6\p@} % the \hrule is .4pt high
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\thefootnote}
-% \changes{v1.1i}{1995/05/16}{Streamlined parts of code.}
-% \begin{macrocode}
-\@definecounter{footnote}
-\def\thefootnote{\@arabic\c@footnote}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\thempfootnote}
-% \changes{v1.1j}{1995/05/18}{Added \cs{itshape}.}
-% \changes{v1.1v}{2002/10/01}{Use braces around \cs{itshape}
-% to keep font change local (pr/3460).}
-% The default display for the footnote counter in minipages is to
-% use italic letters. We use |\itshape| not |\textit| as the latter
-% would add an italic correction.
-% \begin{macrocode}
-\@definecounter{mpfootnote}
-\def\thempfootnote{{\itshape\@alph\c@mpfootnote}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@makefnmark}
-% \changes{v1.1i}{1995/05/16}{Now use \cs{textsuperscript}.}
-% \changes{v1.1j}{1995/05/18}{Added \cs{normalfont}.}
-% \changes{v1.1k}{1995/05/20}{Moved \cs{normalfont} to
-% \cs{textsuperscript}}
-% \changes{v1.1k}{1995/05/20}{Moved \cs{normalfont} back
-% and use \cs{@textsuperscript}}
-% Default definition.
-% \begin{macrocode}
-%\def\@makefnmark{\hbox{$^{\@thefnmark}\m@th$}}
-\def\@makefnmark{\hbox{\@textsuperscript{\normalfont\@thefnmark}}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\textsuperscript}
-% \changes{v1.1i}{1995/05/16}{Command added./pr1503}
-% \changes{v1.1k}{1995/05/20}{Use \cs{normalfont}.}
-% \changes{v1.1l}{1995/05/24}{Use \cs{@textsuperscript}}
-% This command provides superscript characters in the current text
-% font. It's implementation might change!!!
-% \begin{macrocode}
-\DeclareRobustCommand*\textsuperscript[1]{%
- \@textsuperscript{\selectfont#1}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@textsuperscript}
-% \changes{v1.1l}{1995/05/24}{Command added.}
-% \changes{v1.1n}{1995/12/05}{Use \cs{ensuremath} for latex/1984.}
-% \changes{v1.1m}{1995/12/07}
-% {Move \cs{m@th} out of the \cs{ensuremath} for latex/1984.}
-% This command should not be used directly, but may be used to define
-% other commands |\textsuperscript|, |\@makefnmark|. |#1| should
-% always start with a font selection command, to activate the font
-% size switch.
-% \begin{macrocode}
-\def\@textsuperscript#1{%
- {\m@th\ensuremath{^{\mbox{\fontsize\sf@size\z@#1}}}}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\footnotesep}
-% \begin{macrocode}
-\newdimen\footnotesep
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\footnote}
-% \changes{LaTeX2.09}{1991/11/01}
-% {(RmS) Added \cs{let}\cs{protect}\cs{noexpand} in
-% \cs{footnote}, \cs{footnotemark},
-% and \cs{footnotetext}, since \cs{xdef} is used}
-% \changes{LaTeX2.09}{1991/11/22}
-% {(RmS) Added \cs{let}\cs{protect}\cs{noexpand} in
-% \cs{@xfootnote}, \cs{@xfootnotemark},
-% and \cs{@xfootnotetext}}
-% \changes{LaTeX2.09}{1992/11/26}
-% {(RmS) Changed all to
-% `def`protect\string{`noexpand`protect`noexpand\string}}
-% \changes{v1.1b}{1994/11/26}
-% {(ASAJ) Added \cs{protected@xdef}.}
-%
-% \begin{macrocode}
-\def\footnote{\@ifnextchar[\@xfootnote{\stepcounter\@mpfn
- \protected@xdef\@thefnmark{\thempfn}%
- \@footnotemark\@footnotetext}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@xfootnote}
-% \begin{macrocode}
-\def\@xfootnote[#1]{%
- \begingroup
- \csname c@\@mpfn\endcsname #1\relax
- \unrestored@protected@xdef\@thefnmark{\thempfn}%
- \endgroup
- \@footnotemark\@footnotetext}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@footnotetext}
-% \changes{LaTeX2.09}{1991/09/29}
-% {(RmS) added \cs{reset@font}}
-% \changes{LaTeX2.09}{1992/11/26}
-% {(RmS) added protection for \cs{edef}}
-% \changes{v1.0a}{1994/03/07}
-% {(DPC) Extra group for colour}
-% \changes{v1.0c}{1994/03/14}
-% {(DPC) Use \cs{color@begingroup}, add \cs{endgraf}}
-% \changes{v1.0d}{1994/04/18}
-% {(DPC) Remove Colour support}
-% \changes{v1.0g}{1994/05/13}
-% {(DPC) Add new style colour support: \cs{normalcolor}}
-% \changes{v1.0g}{1994/05/13}
-% {(DPC) Use \cs{@finalstrut}}
-% \changes{v1.1a}{1994/10/31}
-% {(DPC/CAR) Move colour setting to output routine}
-% \changes{v1.1b}{1994/11/04}
-% {(ASAJ) Added \cs{protected@edef}.}
-% \changes{v1.1c}{1994/11/05}
-% {Removed \cs{normalcolor} (again)}
-% \changes{v1.1t}{1997/11/19}
-% {Missing percent, again}
-% \begin{macrocode}
-\long\def\@footnotetext#1{\insert\footins{%
- \reset@font\footnotesize
- \interlinepenalty\interfootnotelinepenalty
- \splittopskip\footnotesep
- \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
- \hsize\columnwidth \@parboxrestore
- \protected@edef\@currentlabel{%
- \csname p@footnote\endcsname\@thefnmark
- }%
- \color@begingroup
- \@makefntext{%
- \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}%
- \color@endgroup}}%
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\footnotemark}
-% \changes{v1.1b}{1994/11/04}{Added \cs{protected@xdef} to
-% \cs{footnotemark}.}
-% \begin{macrocode}
-\def\footnotemark{%
- \@ifnextchar[\@xfootnotemark
- {\stepcounter{footnote}%
- \protected@xdef\@thefnmark{\thefootnote}%
- \@footnotemark}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@xfootnotemark}
-% \begin{macrocode}
-\def\@xfootnotemark[#1]{%
- \begingroup
- \c@footnote #1\relax
- \unrestored@protected@xdef\@thefnmark{\thefootnote}%
- \endgroup
- \@footnotemark}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@footnotemark}
-% \changes{v1.1h}{1995/05/12}
-% {Add \cs{nobreak} to allow hyphenation. latex/1605}
-% \begin{macrocode}
-\def\@footnotemark{%
- \leavevmode
- \ifhmode\edef\@x@sf{\the\spacefactor}\nobreak\fi
- \@makefnmark
- \ifhmode\spacefactor\@x@sf\fi
- \relax}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\footnotetext}
-% \begin{macrocode}
-\def\footnotetext{%
- \@ifnextchar [\@xfootnotenext
- {\protected@xdef\@thefnmark{\thempfn}%
- \@footnotetext}}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@xfootnotenext}
-% \begin{macrocode}
-\def\@xfootnotenext[#1]{%
- \begingroup
- \csname c@\@mpfn\endcsname #1\relax
- \unrestored@protected@xdef\@thefnmark{\thempfn}%
- \endgroup
- \@footnotetext}
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\thempfn}
-% \begin{macro}{\@mpfn}
-% \begin{macrocode}
-\def\@mpfn{footnote}
-\def\thempfn{\thefootnote}
-%</2ekernel>
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \Finale
-%