rlm@510: %  P L A C E I N S . S T Y          ver 2.2  April 18, 2005
rlm@510: %  Donald Arseneau                  asnd@triumf.ca
rlm@510: %
rlm@510: %  Modified on March 6, 2011
rlm@510: %  Lex Fridman                      lexfridman@gmail.com
rlm@510: %  See: http://bit.ly/h2Se0u
rlm@510: %
rlm@510: %  Keep floats `in their place'; don't let them float into another section.
rlm@510: %  Instructions are below.
rlm@510: %
rlm@510: %  placeins.sty is freely released to the public domain.
rlm@510: 
rlm@510: 
rlm@510: \def\@fb@botlist{\@botlist}
rlm@510: \def\@fb@topbarrier{\suppressfloats[t]}
rlm@510: 
rlm@510: \catcode`\V=14 % `V' is a comment character unless [verbose]
rlm@510: 
rlm@510: \@ifundefined{DeclareOption}{}%
rlm@510: {\DeclareOption{below}{\def\@fb@botlist{}}
rlm@510:  \DeclareOption{above}{\def\@fb@topbarrier{}}
rlm@510:  \DeclareOption{section}{\AtBeginDocument{%
rlm@510:      \expandafter\renewcommand\expandafter\section\expandafter
rlm@510:        {\expandafter\@fb@secFB\section}%
rlm@510:      \newcommand\@fb@secFB{\FloatBarrier
rlm@510:      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}
rlm@510:      \g@addto@macro\@afterheading{\@fb@afterHHook}
rlm@510:      \gdef\@fb@afterHHook{}
rlm@510:   }}
rlm@510:  \DeclareOption{subsection}{\AtBeginDocument{%
rlm@510:      \expandafter\renewcommand\expandafter\subsection\expandafter
rlm@510:        {\expandafter\@fb@subsecFB\subsection}%
rlm@510:      \newcommand\@fb@subsecFB{\FloatBarrier
rlm@510:      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}
rlm@510:      \g@addto@macro\@afterheading{\@fb@afterHHook}
rlm@510:      \gdef\@fb@afterHHook{}
rlm@510:   }}
rlm@510:  \DeclareOption{subsubsection}{\AtBeginDocument{%
rlm@510:      \expandafter\renewcommand\expandafter\subsubsection\expandafter
rlm@510:        {\expandafter\@fb@subsubsecFB\subsubsection}%
rlm@510:      \newcommand\@fb@subsubsecFB{\FloatBarrier
rlm@510:      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}
rlm@510:      \g@addto@macro\@afterheading{\@fb@afterHHook}
rlm@510:      \gdef\@fb@afterHHook{}
rlm@510:   }}
rlm@510:  \DeclareOption{verbose}{\catcode`\V=9 }% Activate things after `V'
rlm@510:  \ProvidesPackage{placeins}[2005/04/18 \space  v 2.2]
rlm@510:  \ProcessOptions 
rlm@510: } % end of \@ifundefined
rlm@510: 
rlm@510: \def\FloatBarrier{\par\begingroup \let\@elt\relax
rlm@510: V\edef\@tempa{\write\m@ne{Package placeins Info: Float barrier, from
rlm@510: V  input line \the\inputlineno, processed on page \thepage, lands on
rlm@510: V  page \noexpand\thepage. }}\@tempa
rlm@510:  \edef\@tempa{\@fb@botlist\@deferlist\@dbldeferlist}%
rlm@510:  \ifx\@tempa\@empty V\PackageInfo{placeins}{No floats held,}%
rlm@510:  \else
rlm@510:     \ifx\@fltovf\relax % my indicator of recursion
rlm@510:        \if@firstcolumn V\PackageWarning{placeins}{Some floats are stuck,}%
rlm@510:          \clearpage 
rlm@510:        \else V\PackageInfo{placeins}{Eject a column and check again:}%
rlm@510:          \null\newpage\FloatBarrier 
rlm@510:        \fi
rlm@510:     \else V\PackageInfo{placeins}{Must dump some floats}%
rlm@510:        \newpage \let\@fltovf\relax V\PackageInfo{placeins}{Check again:}%
rlm@510:        \FloatBarrier % recurse once only
rlm@510:  \fi\fi \endgroup
rlm@510:  \@fb@topbarrier }
rlm@510: 
rlm@510: \catcode`\V=11
rlm@510: \endinput
rlm@510: 
rlm@510: %====================== BEGIN INSTRUCTIONS ===========================
rlm@510: 
rlm@510:   p l a c e i n s . s t y          ver 2.2  April 18, 2005
rlm@510:   Donald Arseneau                  asnd@triumf.ca
rlm@510: 
rlm@510: 
rlm@510: Placeins.sty keeps floats `in their place', preventing them from floating
rlm@510: past a "\FloatBarrier" command into another section.  To use it, declare
rlm@510: "\usepackage{placeins}" and insert "\FloatBarrier" at places that floats 
rlm@510: should not move past, perhaps at every "\section".  
rlm@510: 
rlm@510: Option:  [section]
rlm@510: 
rlm@510: A more convenient way to stop floats at section boundaries is to change 
rlm@510: the definition of "\section" to include "\FloatBarrier", either at the
rlm@510: beginning, before "\@startsection", or in the `style' specification (see 
rlm@510: The LaTeX Companion, section 2.2.2; or 2.3 in the 1st ed).  If you specify 
rlm@510: "\usepackage[section]{placeins}", then the "\section" command will be 
rlm@510: redefined with "\FloatBarrier" inserted at the beginning.
rlm@510: 
rlm@510: Options:  [above]  [below]
rlm@510: 
rlm@510: Something you may not like is that, by default, "\FloatBarrier" is very 
rlm@510: strict, and will (try to) prevent a float from appearing above the start 
rlm@510: of the current section or below the start of the next section, even 
rlm@510: though the float is still on the same page as its intended section.  
rlm@510: Each restriction can be relaxed separately by using the "[above]" and 
rlm@510: "[below]" package options: "[above]" allows floats to appear above their 
rlm@510: section, if on the same page; "[below]" allows below.
rlm@510: 
rlm@510: NOTE!  The original version of placeins.sty acted like it was loaded
rlm@510: with the option "[above]" specified.
rlm@510: 
rlm@510: There is a problem with LaTeX's "\suppressfloats" being out of step with 
rlm@510: the page breaking (see usenet msg <yfi656pbsn0.fsf@triumf.ca> and thread)
rlm@510: which sometimes allows a float to go above a "\FloatBarrier" placed near
rlm@510: the top of a page. Maybe placeins will fix it sometime later.
rlm@510: 
rlm@510: Option: [verbose]
rlm@510: 
rlm@510: There is a package option "[verbose]" that causes many messages to be
rlm@510: written in the log file.  It might be used to answer the question:
rlm@510: `How did *that* get *there*?!?'
rlm@510: 
rlm@510: %====================== END INSTRUCTIONS ========================
rlm@510: 
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