manual/here.sty

   1 %%% ====================================================================
   2 %%%  @LaTeX-style-file{
   3 %%%     filename        = "here.sty",
   4 %%%     version         = "1.01",
   5 %%%     date            = "12 June 1992",
   6 %%%     time            = "15:26:24 BST",
   7 %%%     author          = "David Carlisle",
   8 %%%     address         = "Computer Science Department
   9 %%%                        Manchester University
  10 %%%                        Oxford Road
  11 %%%                        Manchester
  12 %%%                        England
  13 %%%                        M13 9PL",
  14 %%%     telephone       = "+44 61 275 6139",
  15 %%%     FAX             = "+44 61 275 6236",
  16 %%%     checksum        = "51873 214 1175 8528",
  17 %%%     email           = "carlisle@cs.man.ac.uk (Internet)",
  18 %%%     codetable       = "ISO/ASCII",
  19 %%%     keywords        = "LaTeX, figure, table, floats",
  20 %%%     supported       = "yes",
  21 %%%     docstring       = "
  22 %%%
  23 %%%     here.sty
  24 %%%
  25 %%%     A LaTeX style option giving floats a [H] option,
  26 %%%     meaning `do not float', or `PUT IT HERE'.
  27 %%%
  28 %%%     Documentation requires Mittelbach's doc.sty.
  29 %%%
  30 %%%     The checksum field above was produced by
  31 %%%     Robert Solovay's checksum utility.",
  32 %%%  }
  33 %%% ====================================================================
  34 %
  35 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  36 % * Version 1, 13 Sept 1991
  37 % * Version 1.01, added \vbox accidently omitted from previous version.
  38 %
  39 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  40 %<*x>
  41 % This file may be used without modification as a style (.sty) file.
  42 %
  43 % If you have Mittelbach's doc.sty, this file may be formatted with a
  44 % command like:
  45 %                latex here.sty
  46 %
  47 % If you have the Mittelbach/Duchier/Braams docstrip utility, you may
  48 % produce a faster loading .sty file.  Rename this file to: here.doc
  49 % Then run this file through *plain* TeX:
  50 %                tex here.doc
  51 % This should produce the file here.sty.
  52 % If you do not have plain TeX on your system, you can trick LaTeX into
  53 % doing the work as follows:
  54 %                latex \def\fmtname{plain} \input here.doc
  55 % Note that you may need to quote the arguments here to stop your
  56 % operating system treating the \ characters incorrectly.
  57 %
  58 %                latex here.doc
  59 % Will produce a typeset version of the documentation, as above.
  60 %
  61 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  62 \def\plain{plain}\ifx\fmtname\plain\csname fi\endcsname
  63      \def\batchfile{here.doc}
  64      \input docstrip
  65      \preamble
  66
  67      Do not distribute the stripped version of this file.
  68      The checksum in the header refers to the documented version.
  69
  70      \endpreamble
  71      \generateFile{here.sty}{t}{\from{here.doc}{}}
  72      \endinput
  73 \fi
  74 %
  75 \ifcat a\noexpand @\let\next\relax\else\def\next{%
  76     \documentstyle[here,doc]{article}\MakePercentIgnore}\fi\next
  77 %
  78 %\def\eatmodule<#1>{}\eatmodule
  79 %</x>
  80 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  81 %
  82 % \textwidth=355pt   ^^A Allow macrocode text with 72 columns.
  83 % \CodelineIndex     ^^A Code lines numbered.
  84 % \DisableCrossrefs  ^^A No Cross references.
  85 % \MakeShortVerb{\|} ^^A |\foo| works like \verb+\foo+
  86 %
  87 % \title{here.sty}
  88 % \author{D. P. Carlisle}
  89 % \date{12 June 1992}
  90 % \begin{document}
  91 % \maketitle
  92 % \begin{abstract}
  93 % {\tt here.sty} gives environments such as {\tt figure} and {\tt table}
  94 % a {\tt [H]} option  which means `PUT IT HERE'. As opposed to the
  95 % standard {\tt [h]} option which means `You may put it here if you
  96 % wish'.
  97 % \end{abstract}
  98 %
  99 % \begin{figure}[H]
 100 % This figure will not float, even if this causes a bad page break.
 101 % \caption{It may be captioned as usual.}
 102 % \end{figure}
 103 %
 104 % Many people have problems with \LaTeX's floating environments. A
 105 % common complaint is that all the environments appear at the end of the
 106 % document (or chapter). Many users try to correct this behaviour by
 107 % using the {\tt [h]} option. Incorect use of this option, in particular
 108 % using just {\tt [h]} rather than a more liberal option such as {\tt
 109 % [hp]} actually makes the problem worse!
 110 %
 111 % \LaTeX\ will only position a float (even one with the {\tt [h]}
 112 % option) in a position which does not violate the rules for float
 113 % placement set by the document style. These rules are determined by the
 114 % following parameters:
 115 %
 116 % \begin{table}[H]
 117 % \begin{tabular}{lp{220pt}}
 118 %  |\c@topnumber|&    Number of floats allowed at the top of a
 119 %                          column.\\
 120 %  |\topfraction|&    Fraction of column that can be devoted to
 121 %                          floats.\\
 122 %  |\c@dbltopnumber|\\ \verb|\dbltopfraction|&  Same as above, but for
 123 %                          double-column floats.\\
 124 %  |\c@bottomnumber|\\ \verb|\bottomfraction|&  Same as above for
 125 %                          bottom of page.\\
 126 %  |\c@totalnumber|&  Number of floats allowed in a single column,\\
 127 %                       &  including in-text floats.\\
 128 %  |\textfraction|&   Minimum fraction of column that must contain
 129 %                          text.\\
 130 %  |\floatpagefraction|& Minimum fraction of page that must be taken
 131 %                          up by a  float page.\\
 132 %  |\dblfloatpagefraction|&As above, for double-column floats.
 133 % \end{tabular}
 134 % \caption{\LaTeX`s float placement parameters}
 135 % \end{table}
 136 %
 137 % The default settings (in {\tt article.doc} for {\tt article} style)
 138 % for these parameters make it difficult to set floats if the document
 139 % has a lot of small floats. The result is that \LaTeX\ `holds them
 140 % back' in the hope of finding a better place later. At the end of the
 141 % document (or at a |\clearpage|) it gives up and outputs all the
 142 % remaining floats.
 143 %
 144 % It may be seen from the above paragraph that the `correct' way to
 145 % handle float problems is to write a style file modifying these
 146 % parameters, however for many purposes, authors to not want a float at
 147 % all, they just use the {\tt figure} or {\tt table} environments to get
 148 % the correct spacing, and a counter that may be referenced. This style
 149 % option provides an easy solution in this case. If the {\tt [H]} option
 150 % is specified, the environment will not float even if it causes a bad
 151 % page break, or breaks the rules specified in the above parameters. The
 152 % main drawback is that if the [H] option is used in one figure, and the
 153 % following figure uses the {\tt [t]} option, then the second figure may
 154 % float in front of the first.
 155 %
 156 % Note that the {\tt [H]} should not be used in conjunction with the
 157 % other options. {\tt [Htp]} is not allowed by this style. The {\tt h}
 158 % option may still be used, so {\tt [htp]} is OK.
 159 % \typeout{End of the Introduction and Examples.}
 160 % \typein[\answer]%
 161 %   {Do you want an annotated listing of the macro definitions (y/n) ?}
 162 % \def\next{y}\ifx\answer\next\else\expandafter\stop\fi
 163 %
 164 % \section{The Macros}
 165 % First we make sure that this file is only loaded once.
 166 %    \begin{macrocode}
 167 \ifx\@Hxfloat\@Hundef\else\expandafter\endinput\fi
 168 %    \end{macrocode}
 169 %
 170 % \begin{macro}{\@Hxfloat}
 171 % Now we can save the original version of |\@xfloat|.
 172 %    \begin{macrocode}
 173 \let\@Hxfloat\@xfloat
 174 %    \end{macrocode}
 175 % \end{macro}
 176 % \begin{macro}{\@xfloat}
 177 % The new version of |@xfloat| looks for a |[H]| argument.
 178 % If it is present |\@HHfloat| is called, otherwise the original macro
 179 % (renamed to |\@Hfloat|) is called.
 180 %    \begin{macrocode}
 181 \def\@xfloat#1[{\@ifnextchar{H}{\@HHfloat{#1}[}{\@Hxfloat{#1}[}}
 182 %    \end{macrocode}
 183 % \end{macro}
 184 % \begin{macro}{\@HHfloat}
 185 % First gobble the |[H]|. Note that {\tt H} should not be used in
 186 % conjunction with the other placement options, nor as the value of the
 187 % default placement, as set in |\fps@|{\it type}.
 188 %    \begin{macrocode}
 189 \def\@HHfloat#1[H]{%
 190 %    \end{macrocode}
 191 % Locally redefine the end of the environment.
 192 %    \begin{macrocode}
 193 \expandafter\let\csname end#1\endcsname\end@Hfloat
 194 %    \end{macrocode}
 195 % Add the vertical space, and define |\caption|. Also reset
 196 % |\parindent| for compatibility with the standard {\tt [h]} option.
 197 %    \begin{macrocode}
 198 \vskip\intextsep\vbox\bgroup\def\@captype{#1}\parindent\z@
 199 %    \end{macrocode}
 200 % The final |\ignorespaces| is needed to gobble any spaces or newlines
 201 % after the {\tt[H]} tokens.
 202 %    \begin{macrocode}
 203 \ignorespaces}
 204 %    \end{macrocode}
 205 % \end{macro}
 206 % \begin{macro}{\end@Hfloat}
 207 % Add the same vertical space as would be added by a float placed with
 208 % {\tt[h]}.
 209 %    \begin{macrocode}
 210 \def\end@Hfloat{\egroup\vskip \intextsep}
 211 %    \end{macrocode}
 212 % \end{macro}
 213 % \end{document}