Add support for packages included in documentclass options

[tms320c]

Type of JetBrains IDE (IntelliJ, PyCharm, etc.) and version

GoLand 2019.1.3
Build #GO-191.7479.32, built on May 30, 2019
JRE: 1.8.0_202-release-1483-b53 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

TeXiFy IDEA version

v0.6.6

What I did (steps to reproduce)

I created a document with the following structure (note amsmath in the options):

\documentclass[preprint, showpacs, preprintnumbers, amsmath, amssymb, aps, pre, showkeys, longbibliography]{revtex4-1}
\begin{document}
\input{content/text/chapter1}
\end{document}

inside chapter1.tex:

\begin{equation}
\iiiint % this is from amsmath and plugin "knows" it
\end{equation}

Expected behavior

The plugin recognizes that amsmath package presents and does not add \usepackage{amsmath} on top of the chapter1.tex

Actual behavior

The plugin adds \usepackage{amsmath} on top of the chapter1.tex, which is not really correct itself, see the corresponding bug.

If I add \usepackage{amsmath} into the master file, the plugin works fine -- it recognizes the package presence.

Maybe, special support for revtex4 document type is necessary?

Regards,
Mike

[PHPirates]

Correct, thanks for reporting. Let's keep it simple, this is sufficient to reproduce the problem:

\documentclass[amsmath]{revtex4-1}
\begin{document}
    $\iiiint$
\end{document}

I am not sure whether we should check if the documentclass supports this or not. I don't think we should, because we don't want to maintain a list of all documentclasses which do so, and I think it's too difficult to detect.