Hi Daniel,
Daniel Kessler <[email protected]> writes:
> However, the problem isn't really with todonotes specifically, as can
> be appreciated with the following two MWE latex files that demonstrate
> the crux of the issue with chapter without involving todonotes at
> all.
First of all, many thanks for your report and sorry for the late
response.
> The first yields an error, the second compiles cleanly. They differ
> only in whether the preview package is active or not.
>
> \documentclass{article}
> \usepackage[active,sections]{preview}
> \begin{document}
> \makeatletter
> \@ifundefined{chapter}{\section{Section One}}{\chapter{Chapter One}}
> \makeatother
> \end{document}
>
> vs
>
> \documentclass{article}
> \usepackage[inactive,sections]{preview}
> \begin{document}
> \makeatletter
> \@ifundefined{chapter}{\section{Section One}}{\chapter{Chapter One}}
> \makeatother
> \end{document}
>
> Compiling the first yields
>
> ! Undefined control sequence.
> <argument> \pr@\chapter
> {Chapter One}
> l.7 ...ection{Section One}}{\chapter{Chapter One}}
>
> I think this could be fixed by adding some logic into around where the
> sections options is declared so that
>
> \PreviewMacro[*[[!]{\chapter}%]]
>
> is run *only* if \chapter is already defined. Perhaps there's some
> additional logic that be built into the \PreviewMacro instead, but the
> code used in that definition exceeds my understanding of (la)tex.
If you try this snippet:
\documentclass{article}
\usepackage[active,sections,
auctex % Option added
]{preview}
\begin{document}
\makeatletter
\@ifundefined{chapter}{\section{Section One}}{\chapter{Chapter One}}
\makeatother
\end{document}
the file prauctex.def is loaded which usually happens during the preview
generation inside Emacs, and that file contains:
\preview@delay{\@ifundefined{pr@\string\chapter}{%
\PreviewMacro*[*][#1{}]\chapter}{}}
But even so, the issue you describe happens again (differently) and
there are no previews inside Emacs.
I think the easiest way to circumvent this is by wrapping the
\listoftodos command inside the \ifPreview conditional in your .tex
file:
\documentclass{article}
\usepackage{todonotes}
\usepackage[sections]{preview}
\begin{document}
\ifPreview \else \listoftodos \fi
\section{Section One}
\end{document}
The code in preview.sty also exceeds my understanding of (la)tex, so
this is the best I can offer and I'm afraid this report is a wontfix.
Again, thanks for your report and sorry for the late response.
Best, Arash
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