LaTeX reader: better support for subfigure package.

A figure with two subfigures turns into two pandoc
figures; the subcaptions are used and the main caption
ignored, unless there are no subcaptions.

Closes #3577.

1 files changed, 35 insertions, 0 deletions

diff --git a/test/command/3577.md b/test/command/3577.md
new file mode 100644
index 000000000..bfeb86eaa
--- /dev/null
+++ b/test/command/3577.md
@@ -0,0 +1,35 @@
+```
+% pandoc -f latex -t html5
+\begin{figure}[ht]
+    \begin{subfigure}{0.45\textwidth}
+        \centering
+        \includegraphics{img1.jpg}
+        \caption{Caption 1}
+    \end{subfigure}
+
+    \begin{subfigure}{0.45\textwidth}
+        \centering
+        \includegraphics{img2.jpg}
+        \caption{Caption 2}
+    \end{subfigure}
+    \caption{Subfigure with Subfloat}
+\end{figure}
+^D
+<figure>
+<img src="img1.jpg" alt="Caption 1" /><figcaption>Caption 1</figcaption>
+</figure>
+<figure>
+<img src="img2.jpg" alt="Caption 2" /><figcaption>Caption 2</figcaption>
+</figure>
+```
+```
+% pandoc -f latex -t html5
+\begin{figure}[ht]
+    \includegraphics{img1.jpg}
+    \caption{Caption 3}
+\end{figure}
+^D
+<figure>
+<img src="img1.jpg" alt="Caption 3" /><figcaption>Caption 3</figcaption>
+</figure>
+```