the depth info is missing when using latex package hyperref

[c-ding-math]

I have a tex file test.tex like this:

\usepackage[active,tightpage]{preview}
\begin{document}
\begin{preview}
$A$
\end{preview}
\end{document}

If I use

latexmk -output-format=dvi test.tex
dvisvgm test.dvi

then I get the everything as expected in the stdout:

...
width = ..., height=..., depth=...
...

But when I add the latex package hyperref in the tex file

\usepackage[active,tightpage]{preview}
\usepackage{hyperref}
\begin{document}
\begin{preview}
$A$
\end{preview}
\end{document}

then the width, height and depth info won't show.

[mgieseki]

At the moment, dvisvgm only supports the hypertex mode of the hyperref package. The PS mode can interfere with the processing of the preview data. The following variant should work:

\usepackage[hypertex]{hyperref}

[mgieseki]

I've improved the evaluation of the preview extents so that they are now also recognized if additional PS code interferes with the data.