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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% INSBOX --- macros for inserting pictures into paragraphs %
% Micha\l{} Gulczy\'nski, Szczecin, Jan 1996 / Feb 1998 %
% mgulcz@we.tuniv.szczecin.pl %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% version 2.2
%
% available macros:
% * \InsertBoxC{anybox}
% insert a centered box (use int _inside_ a paragraph)
% * \InsertBoxL{after_line}{anybox}[correction]
% * \InsertBoxR{after_line}{anybox}[correction]
% insert a box in the left/right after specified number of lines;
% correction specified in square brackets is optional;
% both macros should be called _before_ a paragraph
% * \MoveBelowBox
% start a new paragraph just below the current frame
%
% see the demo.tex file for more information
%
\catcode`\@ = 11
%
% Margin between the text and the box:
\newdimen\@InsertBoxMargin
\@InsertBoxMargin = 2mm
%
% definition of \ParShape, an inproved version of plain \parshape
%
\newcount\@numlines % sum: m_1+...+m_n
\newcount\@linesleft % counter used when reading lines of \ParShape
\def\ParShape{%
\@numlines = 0
\def\@parshapedata{ }% here we'll collect data for plain \parshape
\afterassignment\@beginParShape
\@linesleft
}%
\def\@beginParShape{%
\ifnum \@linesleft = 0
\let\@whatnext = \@endParShape
\else
\let\@whatnext = \@readnextline
\fi
\@whatnext
}%
\def\@endParShape{%
\global\parshape = \@numlines \@parshapedata
}%
\def\@readnextline#1 #2 #3 {% #1 #2 #3 are: m_i, leftskip_i, rightskip_i
\ifnum #1 > 0
\bgroup % I want to keep changes of \dimen0 and \count0 local
\dimen0 = \hsize
\advance \dimen0 by -#2 % \parshape requires left skip and
\advance \dimen0 by -#3 % _length_of_line_ (not right skip!)
\count0 = 0
\loop
\global\edef\@parshapedata{%
\@parshapedata % add to \@parshapedata:
#2 % left skip
\space % a space
\the\dimen0 % length of line
\space % another space
}%
\advance \count0 by 1
\ifnum \count0 < #1
\repeat
\egroup
\advance \@numlines by #1
\fi
\advance \@linesleft by -1
\@beginParShape
}%
%
% \InsertBoxC, \InsertBoxL, \InsertBoxR
%
\newbox\@boxcontent % box containing the picture to be inserted
\newcount\@numnormal % number of leading lines to typeset normally
\newdimen\@framewidth % width of the frame
\newdimen\@wherebottom % position of frame's bottom
\newif\if@byframe % true if we are just beside the frame
\@byframefalse
%
%
\def\InsertBoxC#1{%
\leavevmode
\vadjust{
\vskip \@InsertBoxMargin
\hbox to \hsize{\hss#1\hss}
\vskip \@InsertBoxMargin
}%
}%
\def\InsertBoxL#1#2{%
\@numnormal = #1
\setbox\@boxcontent = \hbox{#2}%
\let\@side = 0
\futurelet \@optionalparameter \@InsertBox
}
\def\InsertBoxR#1#2{%
\@numnormal = #1
\setbox\@boxcontent = \hbox{#2}%
\let\@side = 1
\futurelet \@optionalparameter \@InsertBox
}%
\def\@InsertBox{%
\ifx \@optionalparameter [
\let\@whatnext = \@@InsertBoxCorrection
\else
\let\@whatnext = \@@InsertBoxNoCorrection
\fi
\@whatnext
}%
\def\@@InsertBoxCorrection[#1]{%
\ifx \@side 0
\@@InsertBox{#1}{0}{{\the\@framewidth} 0cm}%
\else
\@@InsertBox{#1}{1}{0cm {\the\@framewidth}}%
\fi
}%
\def\@@InsertBoxNoCorrection{%
\@@InsertBoxCorrection[0]%
}%
\def\@@InsertBox#1#2#3{%
\MoveBelowBox
\@byframetrue
% \@wherebottom = \pagetotal + (\@numnormal * \baselineskip) +
% (height of \@boxcontent) + (2 * \@InsertBoxMargin)
\@wherebottom = \baselineskip
\multiply \@wherebottom by \@numnormal
\advance \@wherebottom by 2\@InsertBoxMargin
\advance \@wherebottom by \ht\@boxcontent
\advance \@wherebottom by \pagetotal
% I have no idea why, but \InsertBox called at the top of a page
% calculates space for the box one line too big
\ifdim \pagetotal = 0cm
\advance \@wherebottom by -\baselineskip % ^ reduction
\fi
% add the correction
\advance \@wherebottom by #1\baselineskip
% \@framewidth = (width of \@boxcontent} + \@InsertboxMargin
\@framewidth = \wd\@boxcontent
\advance \@framewidth by \@InsertBoxMargin
%
\bgroup % to keep changes of \dimen0 local
% check if the box fits in the page
\ifdim \pagetotal = 0cm
\dimen0 = \vsize
\else
\dimen0 = \pagegoal
\fi
\ifdim \@wherebottom > \dimen0
% print a warning message ...
\immediate\write16{+--------------------------------------------------------------+}%
\immediate\write16{| The box will not fit in the page. Please, re-edit your text. |}%
\immediate\write16{+--------------------------------------------------------------+}%
% ... and mark this place in document with a black box
\vrule width \overfullrule
\fi
\egroup
\prevgraf = 0
% insert the box in the left (if #2 = 0) or in the right (if #2 = 1)
\vbox to 0cm{%
\dimen0 = \baselineskip
\multiply \dimen0 by \@numnormal
\advance \dimen0 by -\baselineskip
\setbox0 = \hbox{y}%
\vskip \dp0
\vskip \dimen0
\vskip \@InsertBoxMargin
\ifnum #2 = 1
\vtop{\noindent \hbox to \hsize{\hss \box\@boxcontent}}%
\else
\vtop{\noindent \box\@boxcontent}%
\fi
\vss
}%
% I have no idea why, but this is really necessary
\vglue -\parskip
\vskip -\baselineskip
% each following paragraph needs to be formatted properly
\everypar = {%
% are we already below the bottom of the box?
\ifdim \pagetotal < \@wherebottom
% no...
\bgroup % to keep some changes local
% let's calculate parameters for \ParShape
\dimen0 = \@wherebottom
\advance \dimen0 by -\pagetotal
\divide \dimen0 by \baselineskip
\count1 = \dimen0
\advance \count1 by 1
\advance \count1 by -\@numnormal
\ifnum #2 = 1
\ParShape = 3
{\the\@numnormal} 0cm 0cm
{\the\count1} 0cm {\the\@framewidth}
1 0cm 0cm
\else
\ParShape = 3
{\the\@numnormal} 0cm 0cm
{\the\count1} {\the\@framewidth} 0cm
1 0cm 0cm
\fi
\egroup
\else
% yes!
\@restore@ % it's time to end everything
\fi
}%
% this definition isn't very necessary --- just in case the paragraph
% following \InsertBoxL or \InsertBoxR has fewer lines that the
% first argument of the macro
\def\par{%
\endgraf
\global\advance \@numnormal by -\prevgraf
\ifnum \@numnormal < 0
\global\@numnormal = 0
\fi
\prevgraf = 0
}%
}%
%
% call this macro to move the current position just below the
% current frame
%
\def\MoveBelowBox{%
\par
\if@byframe
\global\advance \@wherebottom by -\pagetotal
\ifdim \@wherebottom > 0cm
\vskip \@wherebottom
\fi
\@restore@
\fi
}%
%
% normal settings are as follows:
%
\def\@restore@{%
\global\@wherebottom = 0cm
\global\@byframefalse
\global\everypar = {}%
\global\let \par = \endgraf
\global\parshape = 1 0cm \hsize
}%
%
% someone told me that in LaTeX there is no \pageno counter;
% the counterpart is \c@page
%
\ifx \documentclass \@Dont@Know@What@It@Is@
\else
\let \pageno = \c@page
\fi
\catcode`\@ = 12
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