commit 0550b895e28540a6225b26b1d24ea0897c981aaf
Author: Ian Jauslin <ian@jauslin.org>
Date:   Wed May 19 14:55:57 2021 -0400

    Initial commit

diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
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diff --git a/NOTICE b/NOTICE
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--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,2 @@
+ian-presentation
+Copyright Ian Jauslin 2021
diff --git a/README b/README
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--- /dev/null
+++ b/README
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+ian-presentation is a class for typesetting presentations in LaTeX. It is
+designed with simplicity in mind, and only provides a few features.
+
+
+* Usage
+
+  ian-presentation reports the slide number and the total number of slides,
+  provided the 'pagestyle' is set to 'plain'. The slide number is stored in the
+  \page counter.
+
+  ian-presentation defines a command to display the title of a slide, with the
+  syntax:
+    \title{The Title}
+
+  To create a new slide, one has to insert a page break, for instance by using
+  the TeX commands
+    \vfill
+    \eject
+
+  ian-presentation defines an 'itemize' environment, which is similar to the
+  usual one:
+    \begin{itemize}
+      \item Item
+      \item Item
+    \end{itemize}
+  If an itemize is nested inside another, the bullet point will be changed to a
+  triangle and the indent is increased.
+
+  ian-presentation defines an 'enumerate' environment, which functions like
+  'itemize', except it numbers each entry. Enumerates should not be nested
+  (unsupported for now).
+
+  See the bundled 'example.tex' file for a usage example.
+
+
+* Requirements:
+  pdflatex
+  amssymb
+
+
+* Authors:
+  ian-presentation was written by Ian Jauslin.
+
+
+copyright Ian Jauslin 2021.
diff --git a/example.tex b/example.tex
new file mode 100644
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--- /dev/null
+++ b/example.tex
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+\documentclass{ian-presentation}
+
+\usepackage[hidelinks]{hyperref}
+
+\begin{document}
+\pagestyle{empty}
+\hbox{}\vfil
+\bf\Large
+\hfil Title1\par
+\smallskip
+\hfil title2\par
+\rm
+\vfil
+\large
+\hfil Author
+\normalsize
+\vfil
+arXiv:{\tt \href{http://arxiv.org/abs/}{arxiv number}}\hfill{\tt \href{http://ian.jauslin.org}{http://ian.jauslin.org}}
+\eject
+
+\setcounter{page}1
+\pagestyle{plain}
+
+\title{Slide 1}
+\begin{itemize}
+  \item First point
+  \item Second point
+  \begin{itemize}
+    \item Subpoint
+    \item Subpoint
+  \end{itemize}
+\end{itemize}
+\vfill
+\eject
+
+\title{Slide 2}
+\begin{enumerate}
+  \item First point
+  \item Second point (do not nest enumerates)
+\end{enumerate}
+
+\end{document}
diff --git a/ian-presentation.cls b/ian-presentation.cls
new file mode 100644
index 0000000..1ef3b62
--- /dev/null
+++ b/ian-presentation.cls
@@ -0,0 +1,194 @@
+%% Copyright Ian Jauslin 2021
+%% 
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%% 
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%% 
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+
+%% TeX format
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+
+%% class name
+\ProvidesClass{ian-presentation}[2021/05/19]
+
+\def\ian@defaultoptions{
+  \pagestyle{plain}
+  \RequirePackage{amssymb}
+}
+
+%% paper dimensions
+\setlength\paperheight{240pt}
+\setlength\paperwidth{427pt}
+
+%% fonts
+\input{size11.clo}
+\DeclareOldFontCommand{\rm}{\normalfont\rmfamily}{\mathrm}
+\DeclareOldFontCommand{\sf}{\normalfont\sffamily}{\mathsf}
+\DeclareOldFontCommand{\tt}{\normalfont\ttfamily}{\mathtt}
+\DeclareOldFontCommand{\bf}{\normalfont\bfseries}{\mathbf}
+\DeclareOldFontCommand{\it}{\normalfont\itshape}{\mathit}
+
+%% text dimensions
+\textheight=208pt
+\textwidth=370pt
+\hoffset=-1in
+\voffset=-1in
+\oddsidemargin=24pt
+\evensidemargin=24pt
+\topmargin=8pt
+\headheight=0pt
+\headsep=0pt
+\marginparsep=0pt
+\marginparwidth=0pt
+\footskip=16pt
+
+
+%% remove default skips
+\parindent=0pt
+\parskip=0pt
+\baselineskip=0pt
+
+%% something is wrong with \thepage, redefine it
+\gdef\thepage{\the\c@page}
+
+%% correct vertical alignment at the end of a document
+\AtEndDocument{
+  % save total slide count
+  \immediate\write\@auxout{\noexpand\gdef\noexpand\slidecount{\thepage}}
+  \vfill
+  \eject
+}
+
+
+%% footer
+% plain style
+\def\ps@plain{
+  \def\@oddhead{}
+  \def\@evenhead{\@oddhead}
+  \def\@oddfoot{\tiny\hfill\thepage/\safe\slidecount\hfill}
+  \def\@evenfoot{\@oddfoot}
+}
+% empty style
+\def\ps@empty{
+  \def\@oddhead{}
+  \def\@evenhead{\@oddhead}
+  \def\@oddfoot{}
+  \def\@evenfoot{\@oddfoot}
+}
+
+
+%% title of slide
+\def\title#1{
+  \hfil{\bf\large #1}\par
+  \hfil\vrule width0.75\textwidth height0.3pt\par
+  \vskip5pt
+}
+
+
+%% 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}}%
+}
+
+%% use to call commands even when they are not defined
+\def\safe#1{%
+  \ifdefined#1%
+    #1%
+  \else%
+    {\bf?}%
+  \fi%
+}
+
+
+%% itemize
+% left margin for items
+\newlength\itemizeskip
+\setlength\itemizeskip{20pt}
+% space between the item symbol and the text
+\newlength\itemizeseparator
+\setlength\itemizeseparator{5pt}
+% penalty preceding an itemize
+\def\itemizepenalty{0}
+% counter counting how many itemizes have been nested
+\newcounter{itemizecount}
+
+% item symbol (bullet for first level, triangle for further levels (should not need more than 2 levels in most cases))
+\def\itemizept#1{
+  \ifnum#1=1
+    \textbullet
+  \else
+    $\scriptstyle\blacktriangleright$
+  \fi
+}
+
+% implement itemizes
+\newlength\current@itemizeskip
+\setlength\current@itemizeskip{0pt}
+\def\itemize{
+  \par\penalty\itemizepenalty\medskip\penalty\itemizepenalty
+  % increment level
+  \addtocounter{itemizecount}{1}
+  % increase indent
+  \addtolength\current@itemizeskip{\itemizeskip}
+  \leftskip\current@itemizeskip
+}
+\def\enditemize{
+  % decrement level
+  \addtocounter{itemizecount}{-1}
+  % decrease indent
+  \addtolength\current@itemizeskip{-\itemizeskip}
+  \par\leftskip\current@itemizeskip
+  \medskip
+}
+% implement item
+\newlength\itempt@total
+\def\item{
+  % place symbol on left of margin
+  \settowidth\itempt@total{\itemizept\theitemizecount}
+  \addtolength\itempt@total{\itemizeseparator}
+  \par
+  \medskip
+  \hskip-\itempt@total\itemizept\theitemizecount\hskip\itemizeseparator
+}
+
+%% enumerate (do not nest these!)
+\newcounter{enumerate@count}
+\def\enumerate{
+  \setcounter{enumerate@count}0
+  % redefine \item and \itemizept
+  \let\olditem\item
+  \let\olditemizept\itemizept
+  \def\item{
+    % counter
+    \stepcounter{enumerate@count}
+    % set symbol to enumerate number
+    \def\itemizept####1{{\bf \theenumerate@count.}}
+    \olditem
+  }
+  \itemize
+}
+\def\endenumerate{
+  \enditemize
+  \let\item\olditem
+  \let\itemizept\olditemizept
+}
+
+
+%% end
+\ian@defaultoptions
+
+\endinput