chemobabel.dtx: a bit more

Author: aminophen

README.md

@@ -7,20 +7,29 @@ ChemDraw files or SMILES notations using Open Babel.
 This package offers a new choice for chemists who need
 chemical structures in LaTeX documents.
 With this package you can insert chemical structural formulas
-into your PDF files easily with the help of Open Babel and Inkscape.
+into your documents easily with the help of Open Babel.
 
 Various chemical formats are allowed for input,
 for example, `.cdx`, `.mol` and `.smi`.
 
 ## Package Contents
 
- - chemobabel.sty: Package itself
+ - chemobabel.sty: Package itself; provides `\chemobabel` and `\smilesobabel`
  - chemobabel-{en,ja}.pdf: Basic usage (source: chemobabel.dtx)
  - example-en.{tex,pdf}: Examples in English
  - example-ja.{tex,pdf}: Examples in Japanese
 
 Sample ChemDraw files and MDL Molfiles are also included.
 
+## Requirements
+
+To use this LaTeX package, it is necessary to enable execution
+of the following external commands via `latex -shell-escape`.
+
+ - `obabel` (Open Babel)
+ - `inkscape` or `rsvg-convert` (for SVG -> PDF/EPS conversion)
+ - `pdfcrop` or `ps2eps` (optional; for cropping large margins of PDF/EPS)
+
 ## License
 
 This package is distributed under the BSD 2-Clause License.

chemobabel.dtx

@@ -17,6 +17,7 @@
 \usepackage[nofontspec,defaultsups]{newpxtext}
 \usepackage[zerostyle=c,straightquotes]{newtxtt}
 \usepackage{newpxmath}
+\usepackage{ascmac}
 \usepackage[librsvg]{chemobabel}
 \usepackage[bookmarksnumbered=true,hidelinks,%
  pdftitle={User Manual for chemobabel.sty},%
@@ -123,6 +124,32 @@ becomes wrong.\\ See \url{https://github.com/openbabel/openbabel/issues/338}
 %<ja>問い合わせや改善案などはGitHubのIssuesへお願いします。
 \end{figure}
 
+\begin{figure}[ht]
+\centering
+%<en>Also available on CTAN:
+%<ja>CTANからも入手可能です →
+\url{https://www.ctan.org/pkg/chemobabel}\par
+%<en>Distributed with \TeX\ Live and MiK\TeX.
+%<en>Below is a short description for CTAN:\par
+%<ja>\TeX\ LiveやMiK\TeX でも配布されています。
+%<ja>以下はCTANの短い紹介文です。\par
+\begin{screen}
+This package provides a way to convert and include
+chemical structure graphics from various chemical formats,
+such as ChemDraw files, MDL molfile or SMILES notations
+using Open Babel.
+To use this \LaTeX\ package, it is necessary to enable execution
+of the following external commands via \Lcode{latex -shell-escape}.
+\begin{itemize}
+ \item \Lcode{obabel} (Open Babel)
+ \item \Lcode{inkscape} or \Lcode{rsvg-convert}
+   (for SVG -> PDF/EPS conversion)
+ \item \Lcode{pdfcrop} or \Lcode{ps2eps}
+   (optional; for cropping large margins of PDF/EPS)
+\end{itemize}
+\end{screen}
+\end{figure}
+
 \clearpage
 \setcounter{tocdepth}{3}
 \tableofcontents