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ian-presentation
Copyright Ian Jauslin 2021

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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.

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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}

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%% 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