1 files changed, 509 insertions, 0 deletions
diff --git a/iansecs.sty b/iansecs.sty
new file mode 100644
index 0000000..04ffdd0
--- /dev/null
+++ b/iansecs.sty
@@ -0,0 +1,509 @@
+%%
+%% This file contains the main style commands
+%%
+%% Some options can be set by changing the \loaddefaults command
+%%
+
+\usepackage{color}
+\usepackage{marginnote}
+
+\def\loaddefaults{
+  \sectionstrue
+  \subseqcountfalse
+  \def\seqskip{\vskip1.5cm}
+  \def\subseqskip{\vskip1cm}
+  \resetpointattheofalse
+  \parindent=0pt
+  \def\indent{\hskip20pt}
+}
+
+% false if there are no sections
+\newif\ifsections
+% true if equation numbers should include the subsection number
+\newif\ifsubseqcount
+% true if there is a table of contents
+\newif\iftoc
+% true if point counting should reset at each theorem
+\newif\ifresetpointattheo
+
+% a prefix to put before the section number, e.g. A for appendices
+\def\sectionprefix{}
+
+\loaddefaults
+
+%% style for the equation number
+\def\eqnumstyle{}
+
+%% correct vertical alignment at the end of a document
+\AtEndDocument{
+  \vfill
+  \eject
+}
+
+%% prevent page breaks
+\newcount\prevpostdisplaypenalty
+\def\nopagebreakaftereq{
+  \prevpostdisplaypenalty=\postdisplaypenalty
+  \postdisplaypenalty=10000
+}
+\def\restorepagebreakaftereq{
+  \postdisplaypenalty=\prevpostdisplaypenalty
+}
+
+%% hyperlinks
+% hyperlinkcounter
+\newcounter{lncount}
+% hyperref anchor
+\def\hrefanchor{%
+\stepcounter{lncount}%
+\hypertarget{ln.\thelncount}{}%
+}
+
+%% define a command and write it to aux file
+\def\outdef#1#2{%
+% define command
+\expandafter\xdef\csname #1\endcsname{#2}%
+% hyperlink number
+\expandafter\xdef\csname #1@hl\endcsname{\thelncount}%
+% write command to aux
+\immediate\write\@auxout{\noexpand\expandafter\noexpand\gdef\noexpand\csname #1\endcsname{\csname #1\endcsname}}%
+\immediate\write\@auxout{\noexpand\expandafter\noexpand\gdef\noexpand\csname #1@hl\endcsname{\thelncount}}%
+}
+
+
+%% define a label for the latest tag
+%% label defines a command containing the string stored in \tag
+\AtBeginDocument{
+  \def\label#1{\expandafter\outdef{#1}{\safe\tag}}
+
+\def\ref#1{%
+% check whether the label is defined (hyperlink runs into errors if this check is ommitted)
+\ifcsname #1@hl\endcsname%
+\hyperlink{ln.\csname #1@hl\endcsname}{{\color{blue}\safe\csname #1\endcsname}}%
+\else%
+\ifcsname #1\endcsname%
+{\color{blue}\csname #1\endcsname}%
+\else%
+{\bf ??}%
+\fi%
+\fi%
+}
+}
+
+%% counters
+\newcounter{sectioncount}
+\newcounter{subsectioncount}
+\newcounter{pointcount}
+\newcounter{subpointcount}
+\newcounter{subsubpointcount}
+\newcounter{seqcount}
+\newcounter{figcount}
+\newcounter{Theocount}
+\newcounter{tocsectioncount}
+\newcounter{tocsubsectioncount}
+
+%% section command
+\newlength\secnumwidth
+\newlength\sectitlewidth
+\def\section#1{%
+% reset counters
+\stepcounter{sectioncount}%
+\setcounter{subsectioncount}{0}%
+\setcounter{pointcount}{0}%
+\setcounter{subpointcount}{0}%
+\setcounter{subsubpointcount}{0}%
+\setcounter{figcount}{0}%
+\setcounter{Theocount}{0}%
+\setcounter{seqcount}{0}%
+% space before section (if not first)
+\ifnum\thesectioncount>1%
+\seqskip%
+\penalty-1000%
+\fi%
+% hyperref anchor
+\hrefanchor%
+% define tag (for \label)
+\xdef\tag{\sectionprefix\thesectioncount}%
+% get widths
+\def\@secnum{{\bf\Large\sectionprefix\thesectioncount.\hskip10pt}}%
+\settowidth\secnumwidth{\@secnum}%
+\setlength\sectitlewidth\textwidth%
+\addtolength\sectitlewidth{-\secnumwidth}%
+% print name
+\parbox{\textwidth}{%
+\@secnum%
+\parbox[t]{\sectitlewidth}{\Large\bf #1}}%
+% write to table of contents
+\iftoc%
+% save lncount in aux variable which is written to toc
+\immediate\write\tocoutput{\noexpand\expandafter\noexpand\edef\noexpand\csname toc@sec.\thesectioncount\endcsname{\thelncount}}%
+\write\tocoutput{\noexpand\tocsection{#1}{\thepage}}%
+\fi%
+\par\penalty10000%
+\bigskip\penalty10000%
+}
+
+%% subsection
+\def\subsection#1{
+% counters
+\stepcounter{subsectioncount}%
+\setcounter{pointcount}{0}%
+\setcounter{subpointcount}{0}%
+\setcounter{subsubpointcount}{0}%
+\ifsubseqcount%
+\setcounter{seqcount}0%
+\fi%
+% space before subsection
+\subseqskip%
+\penalty-500%
+% hyperref anchor
+\hrefanchor
+% define tag (for \label)
+\xdef\tag{\sectionprefix\thesectioncount.\thesubsectioncount}%
+% get widths
+\def\@secnum{{\bf\large\hskip.5cm\sectionprefix\thesectioncount.\thesubsectioncount.\hskip5pt}}%
+\settowidth\secnumwidth{\@secnum}%
+\setlength\sectitlewidth\textwidth%
+\addtolength\sectitlewidth{-\secnumwidth}%
+% print name
+\parbox{\textwidth}{%
+\@secnum%
+\parbox[t]{\sectitlewidth}{\large\bf #1}}%
+% write to table of contents
+\iftoc%
+% save lncount in aux variable which is written to toc
+\immediate\write\tocoutput{\noexpand\expandafter\noexpand\edef\noexpand\csname toc@subsec.\thesectioncount.\thesubsectioncount\endcsname{\thelncount}}%
+\write\tocoutput{\noexpand\tocsubsection{#1}{\thepage}}%
+\fi%
+\par\penalty10000%
+\medskip\penalty10000%
+}
+
+%% itemize
+\newlength\itemizeskip
+% left margin for items
+\setlength\itemizeskip{20pt}
+% item symbol
+\def\itemizept{\textbullet}
+\newlength\itemizeseparator
+% space between the item symbol and the text
+\setlength\itemizeseparator{5pt}
+% penalty preceding an itemize
+\def\itemizepenalty{0}
+
+\newlength\current@itemizeskip
+\setlength\current@itemizeskip{0pt}
+\def\itemize{
+  \par\penalty\itemizepenalty\medskip\penalty\itemizepenalty
+  \addtolength\current@itemizeskip{\itemizeskip}
+  \leftskip\current@itemizeskip
+}
+\def\enditemize{
+  \addtolength\current@itemizeskip{-\itemizeskip}
+  \par\leftskip\current@itemizeskip
+  \medskip
+}
+\newlength\itempt@total
+\def\item{
+  \settowidth\itempt@total{\itemizept}
+  \addtolength\itempt@total{\itemizeseparator}
+  \par
+  \medskip
+  \hskip-\itempt@total\itemizept\hskip\itemizeseparator
+}
+
+%% enumerate
+\newcounter{enumerate@count}
+\def\enumerate{
+  \setcounter{enumerate@count}0
+  \let\olditemizept\itemizept%
+  \def\itemizept{\stepcounter{enumerate@count}\theenumerate@count.}
+}
+\def\endenumerate{
+  \let\itemizept\olditemizept
+}
+
+%% points
+\def\point{
+  \stepcounter{pointcount}
+  \setcounter{subpointcount}{0}
+  % hyperref anchor
+  \hrefanchor
+  \indent{\bf \thepointcount\ - }
+  % define tag (for \label)
+  \xdef\tag{\thepointcount}
+}
+\def\subpoint{
+  \stepcounter{subpointcount}
+  \setcounter{subsubpointcount}0
+  % hyperref anchor
+  \hrefanchor
+  \indent\hskip.5cm{\bf \thepointcount-\thesubpointcount\ - }
+  % define tag (for \label)
+  \xdef\tag{\thepointcount-\thesubpointcount}
+}
+\def\subsubpoint{
+  \stepcounter{subsubpointcount}
+  % hyperref anchor
+  \hrefanchor
+  \indent\hskip1cm{\bf \thepointcount-\thesubpointcount-\thesubsubpointcount\ - }
+  % define tag (for \label)
+  \xdef\tag{\thepointcount-\thesubpointcount-\thesubsubpointcount}
+}
+\def\pspoint{
+  \stepcounter{pointcount}
+  \stepcounter{subpointcount}
+  \setcounter{subsubpointcount}0
+  % hyperref anchor
+  \hrefanchor
+  \indent\hskip.5cm{\bf \thepointcount-\thesubpointcount\ - }
+  % define tag (for \label)
+  \xdef\tag{\thepointcount-\thesubpointcount}
+}
+  
+% reset points
+\def\resetpointcounter{
+  \setcounter{pointcount}{0}
+  \setcounter{subpointcount}{0}
+  \setcounter{subsubpointcount}{0}
+}
+
+%% equation numbering
+\def\seqcount{
+  \stepcounter{seqcount}
+  % the output
+  \edef\seqformat{\theseqcount}
+  % add subsection number
+  \ifsubseqcount
+    \let\tmp\seqformat
+    \edef\seqformat{\thesubsectioncount.\tmp}
+  \fi
+  % add section number
+  \ifsections
+    \let\tmp\seqformat
+    \edef\seqformat{\sectionprefix\thesectioncount.\tmp}
+  \fi
+  % define tag (for \label)
+  \xdef\tag{\seqformat}
+  % write number
+  \marginnote{\eqnumstyle\hfill(\seqformat)}
+}
+%% equation environment compatibility
+\def\equation{\hrefanchor$$\seqcount}
+\def\endequation{$$\@ignoretrue}
+
+%% figures
+\newlength\figwidth
+\setlength\figwidth\textwidth
+\addtolength\figwidth{-2.5cm}
+
+\def\caption#1{%
+\stepcounter{figcount}%
+% hyperref anchor
+\hrefanchor%
+% the number of the figure
+\edef\figformat{\thefigcount}%
+% add section number
+\ifsections%
+\let\tmp\figformat%
+\edef\figformat{\sectionprefix\thesectioncount.\tmp}%
+\fi%
+% define tag (for \label)
+\xdef\tag{\figformat}%
+% write
+\hfil fig \figformat: \parbox[t]{\figwidth}{\leavevmode\small#1}%
+\par\bigskip%
+}
+%% short caption: centered
+\def\captionshort#1{%
+\stepcounter{figcount}%
+% hyperref anchor
+\hrefanchor%
+% the number of the figure
+\edef\figformat{\thefigcount}%
+% add section number
+\ifsections%
+\let\tmp\figformat%
+\edef\figformat{\sectionprefix\thesectioncount.\tmp}%
+\fi%
+% define tag (for \label)
+\xdef\tag{\figformat}%
+% write
+\hfil fig \figformat: {\small#1}%
+\par\bigskip%
+}
+
+%% environment
+\def\figure{
+  \par\penalty-500
+}
+\def\endfigure{
+  \par\penalty-1000
+}
+
+%% delimiters
+\def\delimtitle#1{\par%
+\leavevmode%
+\raise.3em\hbox to\hsize{%
+\lower0.3em\hbox{\vrule height0.3em}%
+\hrulefill%
+\ \lower.3em\hbox{#1}\ %
+\hrulefill%
+\lower0.3em\hbox{\vrule height0.3em}%
+}\par\penalty10000}
+
+%% callable by ref
+\def\delimtitleref#1{\par%
+% hyperref anchor
+\hrefanchor%
+% define tag (for \label)
+\xdef\tag{#1}%
+\leavevmode%
+\raise.3em\hbox to\hsize{%
+\lower0.3em\hbox{\vrule height0.3em}%
+\hrulefill%
+\ \lower.3em\hbox{\bf #1}\ %
+\hrulefill%
+\lower0.3em\hbox{\vrule height0.3em}%
+}\par\penalty10000}
+
+%% no title
+\def\delim{\par%
+\leavevmode\raise.3em\hbox to\hsize{%
+\lower0.3em\hbox{\vrule height0.3em}%
+\hrulefill%
+\lower0.3em\hbox{\vrule height0.3em}%
+}\par\penalty10000}
+
+%% end delim
+\def\enddelim{\par\penalty10000%
+\leavevmode%
+\raise.3em\hbox to\hsize{%
+\vrule height0.3em\hrulefill\vrule height0.3em%
+}\par}
+
+\def\delim{\par\leavevmode\raise.3em\hbox to\hsize{\vrule height0.3em\hrulefill\vrule height0.3em}\par\penalty10000}
+\def\enddelim{\par\penalty10000\leavevmode\raise.3em\hbox to\hsize{\vrule height0.3em\hrulefill\vrule height0.3em}\par}
+
+%% theorem headers
+\def\theo#1{
+  \stepcounter{Theocount}
+  % reset points
+  \ifresetpointattheo\resetpointcounter\fi
+  % hyperref anchor
+  \hrefanchor
+  % the number
+  \def\formattheo{\theTheocount}
+  % add section number
+  \ifsections
+    \let\tmp\formattheo
+    \edef\formattheo{\sectionprefix\thesectioncount.\tmp}
+  \fi
+  % define tag (for \label)
+  \xdef\tag{\formattheo}
+  % write
+  \delimtitle{\bf #1 \formattheo}
+}
+\let\endtheo\enddelim
+%% theorem headers with name
+\def\theoname#1#2{
+  \stepcounter{Theocount}
+  % reset points
+  \ifresetpointattheo\resetpointcounter\fi
+  % hyperref anchor
+  \hrefanchor
+  % the number
+  \def\formattheo{\theTheocount}
+  % add section number
+  \ifsections
+    \let\tmp\formattheo
+    \edef\formattheo{\sectionprefix\thesectioncount.\tmp}
+  \fi
+  % define tag (for \label)
+  \xdef\tag{\formattheo}
+  % write
+  \delimtitle{\bf #1 \formattheo\ \rm(\it #2\rm)}
+}
+
+%% start appendices
+\def\appendix{%
+\vfill
+\pagebreak
+% counter
+\setcounter{sectioncount}0%
+% prefix
+\def\sectionprefix{A}%
+% write
+{\bf \LARGE Appendices}\par\penalty10000\bigskip\penalty10000%
+% add a mention in the table of contents
+\iftoc%
+\immediate\write\tocoutput{\noexpand\tocappendices}\penalty10000%
+\fi%
+%% uncomment for new page for each appendix
+%\def\seqskip{\vfill\pagebreak}
+}
+
+%% start references
+\def\references{%
+\hrefanchor%
+% write
+{\bf \LARGE References}\par\penalty10000\bigskip\penalty10000%
+% add a mention in the table of contents
+\iftoc%
+% save lncount in aux variable which is written to toc
+\immediate\write\tocoutput{\noexpand\expandafter\noexpand\edef\noexpand\csname toc@references\endcsname{\thelncount}}%
+\write\tocoutput{\noexpand\tocreferences{\thepage}}\penalty10000%
+\fi%
+}
+
+
+%% table of contents
+\newif\iftocopen
+\def\tableofcontents{
+{\bf \large Table of contents:}\par\penalty10000\bigskip\penalty10000%
+% copy content from file
+\IfFileExists{\jobname.toc}{\input{\jobname.toc}}{{\tt error: table of contents missing}}
+% open new toc
+\newwrite\tocoutput
+\immediate\openout\tocoutput=\jobname.toc
+\toctrue
+}
+%% close file
+\AtEndDocument{
+  % close toc
+  \iftoc
+    \immediate\closeout\tocoutput
+  \fi
+}
+
+
+%% fill line with dots
+\def\leaderfill{\leaders\hbox to 1em {\hss. \hss}\hfill}
+
+%% same as sectionprefix
+\def\tocsectionprefix{}
+
+%% toc formats
+\def\tocsection #1#2{
+  \stepcounter{tocsectioncount}
+  \setcounter{tocsubsectioncount}{0}
+  % write
+  \smallskip\hyperlink{ln.\csname toc@sec.\thetocsectioncount\endcsname}{{\bf \tocsectionprefix\thetocsectioncount}.\hskip5pt {\color{blue}#1}\leaderfill#2}\par
+}
+\def\tocsubsection #1#2{
+  \stepcounter{tocsubsectioncount}
+  % write
+  {\hskip10pt\hyperlink{ln.\csname toc@subsec.\thetocsectioncount.\thetocsubsectioncount\endcsname}{{\bf \thetocsubsectioncount}.\hskip5pt {\color{blue}\small #1}\leaderfill#2}}\par
+}
+\def\tocappendices{
+  \medskip
+  \setcounter{tocsectioncount}0
+  {\bf Appendices}\par
+  \smallskip
+  \def\tocsectionprefix{A}
+}
+\def\tocreferences#1{
+  \medskip
+  {\hyperlink{ln.\csname toc@references\endcsname}{{\color{blue}\bf References}\leaderfill#1}}\par
+  \smallskip
+}