LaTeX reader: support alt text on images. (#8745)

Closes: #8743

1 files changed, 52 insertions, 0 deletions

diff --git a/test/command/8745.md b/test/command/8745.md
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+# Alt text on images
+
+```
+% pandoc -f latex -t native
+\documentclass[12pt]{article}
+\usepackage{graphicx}
+\begin{document}
+Sample text
+\begin{figure}[ht]
+    \includegraphics[alt={Upside down painting},width=0.5\textwidth]{New_York_City_I.jpg}
+    \caption{New York City by Piet Mondrian (Wikipedia)}
+    \label{fig:Mondrian}
+\end{figure}
+\includegraphics[alt={Face of a mandrill}]{mandrill.jpg}
+\end{document}
+^D
+[ Para [ Str "Sample" , Space , Str "text" ]
+, Figure
+    ( "fig:Mondrian" , [] , [] )
+    (Caption
+       Nothing
+       [ Plain
+           [ Str "New"
+           , Space
+           , Str "York"
+           , Space
+           , Str "City"
+           , Space
+           , Str "by"
+           , Space
+           , Str "Piet"
+           , Space
+           , Str "Mondrian"
+           , Space
+           , Str "(Wikipedia)"
+           ]
+       ])
+    [ Para
+        [ Image
+            ( "" , [] , [ ( "width" , "50%" ) ] )
+            [ Str "Upside down painting" ]
+            ( "New_York_City_I.jpg" , "" )
+        ]
+    ]
+, Para
+    [ Image
+        ( "" , [] , [] )
+        [ Str "Face of a mandrill" ]
+        ( "mandrill.jpg" , "" )
+    ]
+]
+```