Fix the chemical equation.

All credits due to @michal-h21 michal-h21/tex4ebook#137
hendricius · Jan 21, 2025 · be63126 · be63126
1 parent d994342
commit be63126
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diff --git a/book/tex4ebook.cfg b/book/tex4ebook.cfg
@@ -19,4 +19,18 @@
     font-family: 'Open Sans';
   }
 </style>}}
+
+% Deal with chemical equations in a single svg
+\ExplSyntaxOn
+\def\standaloneenv#1{}
+\pend:def\schemestart{\Picture+{}}
+\append:def\CF_schemestop{\EndPicture}
+\ExplSyntaxOff
+\makeatletter
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture+[\csname a:Picture-alt\endcsname]{}%
+}
+\makeatother
+
 \EndPreamble
diff --git a/book/website.cfg b/book/website.cfg
@@ -47,5 +47,17 @@
 }
 \ConfigureToc{loc}{\HCode{<span class="lofToc">}}{\ }{}{\HCode{</span><br />}}
 
+\ExplSyntaxOn
+\def\standaloneenv#1{}
+\pend:def\schemestart{\Picture+{}}
+\append:def\CF_schemestop{\EndPicture}
+\ExplSyntaxOff
+\makeatletter
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture+[\csname a:Picture-alt\endcsname]{}%
+}
+\makeatother
+
 \begin{document}
 \EndPreamble