overlays (30sep16)

git-svn-id: svn://tug.org/texlive/trunk@42187 c570f23f-e606-0410-a88d-b1316a301751

9 files changed, 856 insertions, 0 deletions

diff --git a/Master/texmf-dist/doc/latex/overlays/COPYING b/Master/texmf-dist/doc/latex/overlays/COPYING
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--- /dev/null
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@@ -0,0 +1,416 @@
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diff --git a/Master/texmf-dist/doc/latex/overlays/ChangeLog b/Master/texmf-dist/doc/latex/overlays/ChangeLog
new file mode 100644
index 00000000000..068e2cab257
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/ChangeLog
@@ -0,0 +1,6 @@
+2016-09-30:
+ * "fragileoverlays" environment, providing partial support for verbatim content
+ * bump version to 2.0
+
+2016-09-28:
+ * initial release
diff --git a/Master/texmf-dist/doc/latex/overlays/README b/Master/texmf-dist/doc/latex/overlays/README
new file mode 100644
index 00000000000..bb3690c1863
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/README
@@ -0,0 +1,13 @@
+The "overlays" LaTeX package (version 2.0)
+------------------------------------------
+
+The "overlay" allows to write presentations with dynamic slides. It does not
+presuppose any specific document class. Rather, it is a lightweight alternative
+to full-fledged presentation classes like "beamer".
+
+The package is released 'as is' with no warranty under the LaTeX Project Public
+License, version 1.3 [1].
+
+Andreas Nolda (andreas@nolda.org)
+----
+[1] Cf. COPYING.
diff --git a/Master/texmf-dist/doc/latex/overlays/TODO b/Master/texmf-dist/doc/latex/overlays/TODO
new file mode 100644
index 00000000000..77966dceae0
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/TODO
@@ -0,0 +1 @@
+ * preserve linebreaks in the "alltt" environment
diff --git a/Master/texmf-dist/doc/latex/overlays/overlays.pdf b/Master/texmf-dist/doc/latex/overlays/overlays.pdf
new file mode 100644
index 00000000000..2010547d888
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/overlays.pdf
diff --git a/Master/texmf-dist/doc/latex/overlays/overlays.tex b/Master/texmf-dist/doc/latex/overlays/overlays.tex
new file mode 100644
index 00000000000..1698f2f8b9e
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/overlays.tex
@@ -0,0 +1,87 @@
+\documentclass[a4paper]{ltxdoc}
+\usepackage[breaklinks,hidelinks]{hyperref}
+\usepackage{polyglossia}
+\setdefaultlanguage{english}
+\setlength{\leftmargini}{\parindent}
+\frenchspacing
+\sloppy
+
+\begin{document}
+\title{\textsf{overlays} -- incremental slides}
+\author{Andreas Nolda}
+\date{2016/09/30 (v.\,2.0)}
+\maketitle
+
+\noindent The \textsf{overlay} package allows to write presentations with
+incremental slides. It does not presuppose any specific document class. Rather,
+it is a lightweight alternative to full-fledged presentation classes like
+\textsf{beamer}.
+
+In the following, every single state of a incremental slide will be called an
+\emph{overlay} of that slide.
+
+\section{User interface}
+
+\DescribeMacro{overlays}
+\DescribeMacro{fragileoverlays}
+For incremental slides, the following environments are provided:
+\begin{quote}
+|\begin{overlays}{|\meta{total overlay number}|}| \\
+\meta{slide content} \\
+|\end{overlays}|
+\end{quote}
+\begin{quote}
+|\begin{fragileoverlays}{|\meta{total overlay number}|}| \\
+\meta{slide content} \\
+|\end{fragileoverlays}|
+\end{quote}
+The |fragileoverlays| environment should be used for incremental slides with
+verbatim content.
+
+Note that the slide content should fit on a single page.
+
+\DescribeMacro{\alert}
+\DescribeMacro{\visible}
+\DescribeMacro{\only}
+In the slide content, the following commands can be used in order
+to specify the content of the overlays:
+\begin{quote}
+|\alert{|\meta{overlay specification}|}{|\meta{content}|}|
+\end{quote}
+\begin{quote}
+|\visible{|\meta{overlay specification}|}{|\meta{content}|}|
+\end{quote}
+\begin{quote}
+|\only{|\meta{overlay specification}|}{|\meta{content}|}|
+\end{quote} Overlay specifications are either single numbers like |1|, sequences
+of numbers like |1,4|, or ranges of numbers like |1-4| or |1-|.
+
+The |\alert| command highlights its content on the specified overlays with the
+|alert| color, which may be redefined by means of the |\definecolor| command.
+
+The |\visible| command uncovers its content on the overlays which are specified
+in the overlay specification. On unspecified overlays, the content still takes
+up space, being rendered in the |background| color, which, by default, is white.
+
+The content of the |\only| command is also uncovered on the overlays specified
+in the overlay specification, but is absent from unspecified overlays and does
+not take up space there.
+
+\section{Known limitations}
+
+The |\alert|, |\visible|, and |\only| commands must not contain verbatim
+commands or environments. They may be used in the content of the |alltt|
+environment, though.
+
+\section{Credits}
+
+The code of the \textsf{overlays} package is inspired by Matthias Meister's
+\textsf{present} package.
+
+In addition, it uses an algorithm by Martin Scharrer for testing numbers in
+numerical ranges (cf. \url{http://tex.stackexchange.com/q/19000/}).
+
+The code for processing overlays with verbatim content is taken from the
+\textsf{texpower} package, which in turn took it from Till Tantau's
+\textsf{beamer} package.
+\end{document}
diff --git a/Master/texmf-dist/doc/latex/overlays/sample.pdf b/Master/texmf-dist/doc/latex/overlays/sample.pdf
new file mode 100644
index 00000000000..81a6dd27849
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/sample.pdf
diff --git a/Master/texmf-dist/doc/latex/overlays/sample.tex b/Master/texmf-dist/doc/latex/overlays/sample.tex
new file mode 100644
index 00000000000..d48c28a161f
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/overlays/sample.tex
@@ -0,0 +1,202 @@
+\documentclass[fontsize=9pt,landscape,parskip=half]{scrartcl}
+\usepackage{scrlayer-scrpage}
+\usepackage[paperwidth=128mm,
+            paperheight=96mm,
+            margin=8mm,
+            footskip=6mm]{geometry}
+\usepackage{overlays}
+\usepackage[breaklinks,hidelinks]{hyperref}
+\usepackage{url}
+\usepackage[normalem]{ulem}
+\usepackage{doc}
+\usepackage{alltt}
+\lofoot{\hspace{-4mm}%
+        \hyperlink{titlepage}{Andreas Nolda \textbar{}
+                              The \textrm{overlays} package} \textbar{}
+        \hyperlink{page.\thepage}{\thepage}/%
+        \pageref{lastpage}}
+\cofoot{}
+\renewcommand{\familydefault}{\sfdefault}
+\definecolor{alert}{rgb}{0.7,0.15,0.35}
+\definecolor{structure}{rgb}{0.1,0.25,0.5}
+\setkomafont{pagefoot}{\color{structure}\normalfont\bfseries\scriptsize}
+\addtokomafont{sectioning}{\color{structure}}
+\let\hrefsave\href
+\renewcommand{\href}[2]{\hrefsave{#1}{\uline{#2}}}
+\frenchspacing
+\sloppy
+
+\begin{document}
+\pagestyle{scrheadings}
+\raggedright
+
+\thispagestyle{empty}
+\label{titlepage}
+{\color{structure}%
+{\Large \textbf{The \textrm{overlays} package} \\
+\textit{A sample presentation}} \\[\baselineskip]
+Andreas Nolda \\
+\url{http://andreas.nolda.org}}\vfill
+{\small Version 2.0 \\
+30 September 2016}
+\clearpage
+
+\begin{fragileoverlays}{6}
+\subsubsection*{Overlays}
+The \textrm{overlays} package allows to write presentations with incremental
+slides. It does not presuppose any specific document class. Rather, it is a
+lightweight alternative to full-fledged presentation classes like
+\href{http://www.ctan.org/pkg/beamer}{\textrm{beamer}}.
+
+\visible{2-}{Every single state of a incremental slide will called an
+\emph{overlay} of that slide.}
+
+\visible{3-}{For incremental slides, the following environment is provided:}
+\begin{quote}
+\begin{alltt}
+\visible{3-}{\alert{3}{\textbackslash{}begin\{overlays\}\{\meta{total overlay number}\}
+\alert{4-}{\meta{slide content}}
+\textbackslash{}end\{overlays\}}}
+\end{alltt}
+\end{quote}
+
+\visible{4-}{In the slide content, the following commands can be used in order
+to specify the content of the overlays:
+\only{4}{\texttt{\textbackslash{}alert}.}%
+\only{5}{\texttt{\textbackslash{}visible}.}%
+\only{6}{\texttt{\textbackslash{}only}.}}
+\end{fragileoverlays}
+\clearpage
+
+% Slide with verbatim content.
+
+\begin{fragileoverlays}{6}
+\subsubsection*{Highlightning}
+For highlightning some content, the \textrm{overlays} package provides
+following command:
+\begin{quote}
+\begin{alltt}
+\alert{1}{\textbackslash{}alert\{\alert{2-5}{\meta{overlay specification}}\}\{\meta{content}\}}
+\end{alltt}
+\end{quote}
+
+\visible{2-}{Overlay specifications are either
+\alert{3}{single numbers},
+\alert{4}{sequences of numbers}, or
+\alert{5}{ranges of numbers}.
+\visible{3-}{For example:
+\begin{itemize}
+\item{} \alert{3}{\texttt{1}}
+\visible{4-}{\item{} \alert{4}{\texttt{1,4}}}
+\visible{5-}{\item{} \alert{5}{\texttt{1-4}}
+\item{} \alert{5}{\texttt{1-}}}
+\end{itemize}}}
+
+\visible{6}{The \texttt{alert} color is red by default and can be changed to,
+say, \alert{6}{magenta} as follows:
+\begin{quote}
+\begin{alltt}
+\textbackslash{}definecolor\{alert\}\{rgb\}\{\alert{6}{0.7,0.15,0.35}\}
+\end{alltt}
+\end{quote}}
+\end{fragileoverlays}
+\clearpage
+
+\begin{fragileoverlays}{5}
+\subsubsection*{Visibility}
+The visibility of content is specified by means of the following commands:
+\begin{quote}
+\begin{alltt}
+\alert{1-3}{\textbackslash{}visible\{\meta{overlay specification}\}\{\meta{content}\}}
+\end{alltt}
+\end{quote}
+\begin{quote}
+\begin{alltt}
+\alert{1,4-}{\textbackslash{}only\{\meta{overlay specification}\}\{\meta{content}\}}
+\end{alltt}
+\end{quote}
+
+\only{2,3}{The \texttt{\textbackslash{}visible} command uncovers its content on
+the overlays which are specified in the overlay specification.}
+
+\only{3}{On unspecified overlays, the content is hidden, but still takes up
+space. Technically speaking, it is rendered in the \texttt{background} color,
+which, by default, is white.}%
+\only{4-}{
+The \texttt{\textbackslash{}only} command also uncovers its content on the
+overlays specified in the overlay specification.
+
+The content is absent from unspecified overlays and does not take up space
+there.}
+
+\only{5}{This is particularly useful for alternating content.}
+\end{fragileoverlays}
+\clearpage
+
+\begin{fragileoverlays}{3}
+\subsubsection*{Verbatim content}
+For incremental slides with verbatim content, the following environment should
+be used instead of the \texttt{overlay} environment:
+\begin{quote}
+\begin{alltt}
+\alert{1}{\textbackslash{}begin\{fragileoverlays\}\{\meta{total overlay number}\}
+\meta{slide content}
+\textbackslash{}end\{fragileoverlays\}}
+\end{alltt}
+\end{quote}
+
+\visible{2-}{Note that the \alert{2,3}{\texttt{\textbackslash{}alert}},
+\alert{2,3}{\texttt{\textbackslash{}visible}}, and
+\alert{2,3}{\texttt{\textbackslash{}only}} commands themselves must not contain
+verbatim commands or environments.\visible{3}{ They may be used in the content
+of the \texttt{alltt} environment of the
+\href{http://www.ctan.org/pkg/alltt}{\textrm{alltt} package}, though.}}
+\end{fragileoverlays}
+\clearpage
+
+\begin{overlays}{6}
+\subsubsection*{Caveats}
+The package expects that the slide content in the \texttt{overlays} environment
+fits on a single page. This can be ensured by means of
+\texttt{\textbackslash{}clearpage} commands before or after the environment.
+
+\visible{2-}{The \texttt{page} counter is not incremented between overlays.
+Other counters may give rise to unexpected results.}
+
+\visible{3-}{In the \texttt{tabular} environment, the
+\alert{3}{\texttt{\textbackslash{}alert}},
+\alert{4}{\texttt{\textbackslash{}visible}} and
+\alert{5}{\texttt{\textbackslash{}only}} commands have to be put into braces:
+\begin{quote}
+\begin{tabular}[t]{ll}
+outside \texttt{tabular} & inside \texttt{tabular} \\\hline
+{\alert{3}{\texttt{\textbackslash{}alert\{\ldots\}\{\ldots\}}}} &
+{\alert{3}{\texttt{\{\textbackslash{}alert\{\ldots\}\{\ldots\}\}}}} \\
+{\visible{4-}{{\alert{4}{\texttt{\textbackslash{}visible\{\ldots\}\{\ldots\}}}}}} &
+{\visible{4-}{{\alert{4}{\texttt{\{\textbackslash{}visible\{\ldots\}\{\ldots\}\}}}}}} \\
+{\visible{5-}{{\alert{5}{\texttt{\textbackslash{}only\{\ldots\}\{\ldots\}}}}}} &
+{\visible{5-}{{\alert{5}{\texttt{\{\textbackslash{}only\{\ldots\}\{\ldots\}\}}}}}}
+\end{tabular}
+\end{quote}}
+\visible{6-}{In addition, make sure not to include the cell delimiter
+\texttt{\&} or the row delimiter \texttt{\textbackslash{}\textbackslash{}} into
+the content of these commands.}
+\end{overlays}
+\clearpage
+
+\begin{overlays}{3}
+\subsubsection*{Credits}
+The code of the \textrm{overlays} package is inspired by
+\href{http://www.ctan.org/pkg/present}{Matthias Meister's \textrm{present}
+package}.
+
+\visible{2-}{In addition, it uses
+\href{http://tex.stackexchange.com/q/19000/}{an algorithm by Martin Scharrer}
+for testing numbers in numerical ranges.}
+
+\visible{3}{The code for processing overlays with verbatim content is taken from
+the \textrm{texpower} package, which in turn took it from Till Tantau's
+\textrm{beamer} package.}
+\end{overlays}
+\label{lastpage}
+\end{document}
diff --git a/Master/texmf-dist/tex/latex/overlays/overlays.sty b/Master/texmf-dist/tex/latex/overlays/overlays.sty
new file mode 100644
index 00000000000..8cf8df8a893
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/overlays/overlays.sty
@@ -0,0 +1,131 @@
+\ProvidesPackage{overlays}[2016/09/30 v2.0 Incremental slides]
+
+% Copyright (C) 2016 Andreas Nolda
+
+% Author: Andreas Nolda <andreas@nolda.org>
+% Version: 2.0
+
+% This work may be distributed and/or modified under the conditions of the LaTeX
+% Project Public License, either version 1.3 of this license or (at your option)
+% any later version. The latest version of this license is in
+% http://www.latex-project.org/lppl.txt and version 1.3 or later is part of all
+% distributions of LaTeX version 2005/12/01 or later.
+
+% The following code is inspired by Matthias Meister's "present" package. It
+% uses an algorithm by Martin Scharrer for testing numbers in numerical ranges
+% (http://tex.stackexchange.com/q/19000/). The code for processing overlays with
+% verbatim content is taken from the "texpower" package, which in turn took it
+% from Till Tantau's "beamer" package.
+
+\RequirePackage{color}
+\RequirePackage{environ}
+\RequirePackage{pgffor}
+
+\definecolor{background}{rgb}{1,1,1}
+\definecolor{alert}{rgb}{1,0,0}
+
+\newcount\curoverl@y
+\newcount\maxoverl@y
+\newcount\overl@yspeca
+\newcount\overl@yspecb
+\newcount\saveequ@tion
+
+\def\@getoverl@yspecb-#1\relax%
+  {\ifx\relax#1\relax
+     \overl@yspecb=\maxoverl@y
+   \else
+     \overl@yspecb=#1\relax
+   \fi}
+
+\def\getoverl@yspecb%
+  {\@ifnextchar\relax
+     {\overl@yspecb=\overl@yspeca}%
+     {\@getoverl@yspecb}}
+
+\def\ifinoverl@yspec#1#2%
+  {\global\let\inoverl@yspec\@secondoftwo
+   \foreach \i in {#2}
+     {\afterassignment\getoverl@yspecb
+      \overl@yspeca=0\i\relax
+      \pgfmathtruncatemacro\result{(#1>=\overl@yspeca) && (#1<=\overl@yspecb)}%
+      \ifnum\result=1\relax
+        \breakforeach
+        \global\let\inoverl@yspec\@firstoftwo
+      \fi}%
+   \inoverl@yspec}
+
+\long\def\overl@y#1#2#3{\ifinoverl@yspec{\curoverl@y}{#1}{#2}{#3}}
+
+\NewEnviron{overlays}[1]%
+  {\maxoverl@y=#1%
+   \curoverl@y=0%
+   \saveequ@tion=\value{equation}%
+   \loop
+     \advance\curoverl@y by 1%
+     \begingroup
+     \BODY
+     \endgroup
+     \ifnum\curoverl@y<\maxoverl@y%
+       \vfill
+       \clearpage
+       \addtocounter{page}{-1}%
+       \setcounter{equation}{\saveequ@tion}%
+   \repeat}
+
+\newwrite\verb@timfileout
+
+\def\verb@timreadslide
+  {\begingroup%
+   \let\do\@makeother\dospecials%
+   \count@=127%
+   \@whilenum\count@<255 \do
+     {\advance\count@ by 1%
+      \catcode\count@=11}
+   \@makeother\^^L
+   \endlinechar`\^^M \catcode`\^^M=12 \processslidefirstline}
+
+{\catcode`\^^M=12\endlinechar=-1%
+ \long\gdef\processslidefirstline#1^^M%
+   {\def\overl@ystest{#1}%
+    \ifx\overl@ystest\stopslidefirst%
+      \let\next=\endfr@gileoverl@ys%
+    \else
+      \ifx\overl@ystest\@empty%
+      \else%
+        \@temptokena={#1}%
+        \immediate\write\verb@timfileout{\the\@temptokena}%
+      \fi%
+      \let\next=\processslideline%
+    \fi%
+    \next}
+ \long\gdef\processslideline#1^^M%
+   {\def\overl@ystest{#1}%
+    \ifx\overl@ystest\stopslide%
+      \let\next=\endfr@gileoverl@ys%
+    \else
+      \immediate\write\verb@timfileout{#1}%
+    \fi%
+    \next}}
+
+{\escapechar=-1\relax%
+ \xdef\stopslide{\string\\end\string\{fragileoverlays\string\}}
+ \xdef\stopslidefirst{\noexpand\end\string\{fragileoverlays\string\}}}
+
+\newenvironment{fragileoverlays}[1]
+  {\maxoverl@y=#1%
+   \def\verb@timfilen@me{\jobname.vrb}%
+   \immediate\openout\verb@timfileout=\verb@timfilen@me%
+   \verb@timreadslide}
+  {\immediate\closeout\verb@timfileout%
+   \begin{overlays}{\maxoverl@y}
+   \def\verbatim@nolig@list{\do\`\do\<\do\>\do\'} % do not make "," and "-" active
+   \input{\verb@timfilen@me}%
+   \end{overlays}}
+
+\def\endfr@gileoverl@ys{\endgroup\end{fragileoverlays}}
+
+\newcommand{\only}[2]{\overl@y{#1}{#2}{\relax}}
+
+\newcommand{\visible}[2]{\overl@y{#1}{#2}{{\color{background}#2\ifvmode\unskip\fi}}}
+
+\newcommand{\alert}[2]{\overl@y{#1}{{\color{alert}#2\ifvmode\unskip\fi}}{#2}}