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     1 %  P L A C E I N S . S T Y          ver 2.2  April 18, 2005

     2 %  Donald Arseneau                  asnd@triumf.ca

     3 %

     4 %  Modified on March 6, 2011

     5 %  Lex Fridman                      lexfridman@gmail.com

     6 %  See: http://bit.ly/h2Se0u

     7 %

     8 %  Keep floats `in their place'; don't let them float into another section.

     9 %  Instructions are below.

    10 %

    11 %  placeins.sty is freely released to the public domain.

    12 

    13 

    14 \def\@fb@botlist{\@botlist}

    15 \def\@fb@topbarrier{\suppressfloats[t]}

    16 

    17 \catcode`\V=14 % `V' is a comment character unless [verbose]

    18 

    19 \@ifundefined{DeclareOption}{}%

    20 {\DeclareOption{below}{\def\@fb@botlist{}}

    21  \DeclareOption{above}{\def\@fb@topbarrier{}}

    22  \DeclareOption{section}{\AtBeginDocument{%

    23      \expandafter\renewcommand\expandafter\section\expandafter

    24        {\expandafter\@fb@secFB\section}%

    25      \newcommand\@fb@secFB{\FloatBarrier

    26      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}

    27      \g@addto@macro\@afterheading{\@fb@afterHHook}

    28      \gdef\@fb@afterHHook{}

    29   }}

    30  \DeclareOption{subsection}{\AtBeginDocument{%

    31      \expandafter\renewcommand\expandafter\subsection\expandafter

    32        {\expandafter\@fb@subsecFB\subsection}%

    33      \newcommand\@fb@subsecFB{\FloatBarrier

    34      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}

    35      \g@addto@macro\@afterheading{\@fb@afterHHook}

    36      \gdef\@fb@afterHHook{}

    37   }}

    38  \DeclareOption{subsubsection}{\AtBeginDocument{%

    39      \expandafter\renewcommand\expandafter\subsubsection\expandafter

    40        {\expandafter\@fb@subsubsecFB\subsubsection}%

    41      \newcommand\@fb@subsubsecFB{\FloatBarrier

    42      \gdef\@fb@afterHHook{\@fb@topbarrier \gdef\@fb@afterHHook{}}}

    43      \g@addto@macro\@afterheading{\@fb@afterHHook}

    44      \gdef\@fb@afterHHook{}

    45   }}

    46  \DeclareOption{verbose}{\catcode`\V=9 }% Activate things after `V'

    47  \ProvidesPackage{placeins}[2005/04/18 \space  v 2.2]

    48  \ProcessOptions 

    49 } % end of \@ifundefined

    50 

    51 \def\FloatBarrier{\par\begingroup \let\@elt\relax

    52 V\edef\@tempa{\write\m@ne{Package placeins Info: Float barrier, from

    53 V  input line \the\inputlineno, processed on page \thepage, lands on

    54 V  page \noexpand\thepage. }}\@tempa

    55  \edef\@tempa{\@fb@botlist\@deferlist\@dbldeferlist}%

    56  \ifx\@tempa\@empty V\PackageInfo{placeins}{No floats held,}%

    57  \else

    58     \ifx\@fltovf\relax % my indicator of recursion

    59        \if@firstcolumn V\PackageWarning{placeins}{Some floats are stuck,}%

    60          \clearpage 

    61        \else V\PackageInfo{placeins}{Eject a column and check again:}%

    62          \null\newpage\FloatBarrier 

    63        \fi

    64     \else V\PackageInfo{placeins}{Must dump some floats}%

    65        \newpage \let\@fltovf\relax V\PackageInfo{placeins}{Check again:}%

    66        \FloatBarrier % recurse once only

    67  \fi\fi \endgroup

    68  \@fb@topbarrier }

    69 

    70 \catcode`\V=11

    71 \endinput

    72 

    73 %====================== BEGIN INSTRUCTIONS ===========================

    74 

    75   p l a c e i n s . s t y          ver 2.2  April 18, 2005

    76   Donald Arseneau                  asnd@triumf.ca

    77 

    78 

    79 Placeins.sty keeps floats `in their place', preventing them from floating

    80 past a "\FloatBarrier" command into another section.  To use it, declare

    81 "\usepackage{placeins}" and insert "\FloatBarrier" at places that floats 

    82 should not move past, perhaps at every "\section".  

    83 

    84 Option:  [section]

    85 

    86 A more convenient way to stop floats at section boundaries is to change 

    87 the definition of "\section" to include "\FloatBarrier", either at the

    88 beginning, before "\@startsection", or in the `style' specification (see 

    89 The LaTeX Companion, section 2.2.2; or 2.3 in the 1st ed).  If you specify 

    90 "\usepackage[section]{placeins}", then the "\section" command will be 

    91 redefined with "\FloatBarrier" inserted at the beginning.

    92 

    93 Options:  [above]  [below]

    94 

    95 Something you may not like is that, by default, "\FloatBarrier" is very 

    96 strict, and will (try to) prevent a float from appearing above the start 

    97 of the current section or below the start of the next section, even 

    98 though the float is still on the same page as its intended section.  

    99 Each restriction can be relaxed separately by using the "[above]" and 

   100 "[below]" package options: "[above]" allows floats to appear above their 

   101 section, if on the same page; "[below]" allows below.

   102 

   103 NOTE!  The original version of placeins.sty acted like it was loaded

   104 with the option "[above]" specified.

   105 

   106 There is a problem with LaTeX's "\suppressfloats" being out of step with 

   107 the page breaking (see usenet msg <yfi656pbsn0.fsf@triumf.ca> and thread)

   108 which sometimes allows a float to go above a "\FloatBarrier" placed near

   109 the top of a page. Maybe placeins will fix it sometime later.

   110 

   111 Option: [verbose]

   112 

   113 There is a package option "[verbose]" that causes many messages to be

   114 written in the log file.  It might be used to answer the question:

   115 `How did *that* get *there*?!?'

   116 

   117 %====================== END INSTRUCTIONS ========================

   118 

   119 Test file integrity:  ASCII 32-57, 58-126:  !"#$%&'()*+,-./0123456789

   120 :;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 30 Mar 2014 01:34:43 -0400
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