DocBook reader mediaobjects and figures, closes #2184

3 files changed, 43 insertions, 15 deletions

diff --git a/src/Text/Pandoc/Readers/DocBook.hs b/src/Text/Pandoc/Readers/DocBook.hs
index 98a142840..3cc2a4479 100644
--- a/src/Text/Pandoc/Readers/DocBook.hs
+++ b/src/Text/Pandoc/Readers/DocBook.hs
@@ -167,7 +167,9 @@ List of all DocBook tags, with [x] indicating implemented,
 [x] glossseealso - A cross-reference from one GlossEntry to another
 [x] glossterm - A glossary term
 [ ] graphic - A displayed graphical object (not an inline)
+    Note: in DocBook v5 `graphic` is discarded
 [ ] graphicco - A graphic that contains callout areas
+    Note: in DocBook v5 `graphicco` is discarded
 [ ] group - A group of elements in a CmdSynopsis
 [ ] guibutton - The text on a button in a GUI
 [ ] guiicon - Graphic and/or text appearing as a icon in a GUI
@@ -180,8 +182,9 @@ List of all DocBook tags, with [x] indicating implemented,
 [ ] holder - The name of the individual or organization that holds a copyright
 [o] honorific - The title of a person
 [ ] html:form - An HTML form
-[ ] imagedata - Pointer to external image data
-[ ] imageobject - A wrapper for image data and its associated meta-information
+[x] imagedata - Pointer to external image data (only `fileref` attribute
+    implemented but not `entityref` which would require parsing of the DTD)
+[x] imageobject - A wrapper for image data and its associated meta-information
 [ ] imageobjectco - A wrapper for an image object with callouts
 [x] important - An admonition set off from the text
 [x] index - An index
@@ -627,18 +630,24 @@ addToStart toadd bs =
 
 -- function that is used by both mediaobject (in parseBlock)
 -- and inlinemediaobject (in parseInline)
-getImage :: Element -> DB Inlines
-getImage e = do
+-- A DocBook mediaobject is a wrapper around a set of alternative presentations
+getMediaobject :: Element -> DB Inlines
+getMediaobject e = do
   imageUrl <- case filterChild (named "imageobject") e of
                 Nothing  -> return mempty
                 Just z   -> case filterChild (named "imagedata") z of
                               Nothing -> return mempty
                               Just i -> return $ attrValue "fileref" i
-  caption <- case filterChild
-                  (\x -> named "caption" x || named "textobject" x) e of
-               Nothing  -> gets dbFigureTitle
-               Just z   -> mconcat <$> (mapM parseInline $ elContent z)
-  return $ image imageUrl "" caption
+  let getCaption el = case filterChild (\x -> named "caption" x
+                                            || named "textobject" x
+                                            || named "alt" x) el of
+                        Nothing -> return mempty
+                        Just z  -> mconcat <$> (mapM parseInline $ elContent z)
+  figTitle <- gets dbFigureTitle
+  let (caption, title) = if isNull figTitle
+                            then (getCaption e, "")
+                            else (return figTitle, "fig:")
+  liftM (image imageUrl title) caption
 
 getBlocks :: Element -> DB Blocks
 getBlocks e =  mconcat <$> (mapM parseBlock $ elContent e)
@@ -734,7 +743,7 @@ parseBlock (Elem e) =
             <$> listitems
         "variablelist" -> definitionList <$> deflistitems
         "figure" -> getFigure e
-        "mediaobject" -> para <$> getImage e
+        "mediaobject" -> para <$> getMediaobject e
         "caption" -> return mempty
         "info" -> metaBlock
         "articleinfo" -> metaBlock
@@ -902,7 +911,7 @@ parseInline (Elem e) =
         "inlineequation" -> equation math
         "subscript" -> subscript <$> innerInlines
         "superscript" -> superscript <$> innerInlines
-        "inlinemediaobject" -> getImage e
+        "inlinemediaobject" -> getMediaobject e
         "quote" -> do
             qt <- gets dbQuoteType
             let qt' = if qt == SingleQuote then DoubleQuote else SingleQuote
diff --git a/tests/docbook-reader.docbook b/tests/docbook-reader.docbook
index cf5059646..3a4fc77c6 100644
--- a/tests/docbook-reader.docbook
+++ b/tests/docbook-reader.docbook
@@ -1033,12 +1033,12 @@ or here: &lt;http://example.com/&gt;
     From <quote>Voyage dans la Lune</quote> by Georges Melies (1902):
   </para>
   <figure>
-    <title>lalune</title>
+    <title>lalune fig caption</title>
     <mediaobject>
       <imageobject>
         <imagedata fileref="lalune.jpg" />
       </imageobject>
-      <textobject><phrase>lalune</phrase></textobject>
+      <textobject><phrase>lalune alt text shadowed by fig caption</phrase></textobject>
     </mediaobject>
   </figure>
   <para>
@@ -1047,7 +1047,25 @@ or here: &lt;http://example.com/&gt;
         <imagedata fileref="movie.jpg" />
       </imageobject>
     </inlinemediaobject> icon.
+    And here a second movie <inlinemediaobject>
+      <alt>alt text</alt>
+      <imageobject>
+        <imagedata fileref="movie.jpg" />
+      </imageobject>
+    </inlinemediaobject> icon.
+    And here a third movie <inlinemediaobject>
+      <textobject><phrase>alt text</phrase></textobject>
+      <imageobject>
+        <imagedata fileref="movie.jpg" />
+      </imageobject>
+    </inlinemediaobject> icon.
   </para>
+  <mediaobject>
+    <imageobject>
+      <imagedata fileref="lalune.jpg" />
+    </imageobject>
+    <textobject><phrase>lalune no figure alt text</phrase></textobject>
+  </mediaobject>
 </sect1>
 <sect1 id="footnotes">
   <title>Footnotes</title>
diff --git a/tests/docbook-reader.native b/tests/docbook-reader.native
index 353a352a2..b87e28d1c 100644
--- a/tests/docbook-reader.native
+++ b/tests/docbook-reader.native
@@ -270,8 +270,9 @@ Pandoc (Meta {unMeta = fromList [("author",MetaList [MetaInlines [Str "John",Spa
 ,CodeBlock ("",[],[]) "or here: <http://example.com/>"
 ,Header 1 ("images",[],[]) [Str "Images"]
 ,Para [Str "From",Space,Quoted DoubleQuote [Str "Voyage",Space,Str "dans",Space,Str "la",Space,Str "Lune"],Space,Str "by",Space,Str "Georges",Space,Str "Melies",Space,Str "(1902):"]
-,Para [Image [Str "lalune"] ("lalune.jpg","")]
-,Para [Str "Here",Space,Str "is",Space,Str "a",Space,Str "movie",Space,Image [] ("movie.jpg",""),Space,Str "icon."]
+,Para [Image [Str "lalune",Space,Str "fig",Space,Str "caption"] ("lalune.jpg","fig:")]
+,Para [Str "Here",Space,Str "is",Space,Str "a",Space,Str "movie",Space,Image [] ("movie.jpg",""),Space,Str "icon.",Space,Str "And",Space,Str "here",Space,Str "a",Space,Str "second",Space,Str "movie",Space,Image [Str "alt",Space,Str "text"] ("movie.jpg",""),Space,Str "icon.",Space,Str "And",Space,Str "here",Space,Str "a",Space,Str "third",Space,Str "movie",Space,Image [Str "alt",Space,Str "text"] ("movie.jpg",""),Space,Str "icon."]
+,Para [Image [Str "lalune",Space,Str "no",Space,Str "figure",Space,Str "alt",Space,Str "text"] ("lalune.jpg","")]
 ,Header 1 ("footnotes",[],[]) [Str "Footnotes"]
 ,Para [Str "Here",Space,Str "is",Space,Str "a",Space,Str "footnote",Space,Str "reference,",Note [Para [Str "Here",Space,Str "is",Space,Str "the",Space,Str "footnote.",Space,Str "It",Space,Str "can",Space,Str "go",Space,Str "anywhere",Space,Str "after",Space,Str "the",Space,Str "footnote",Space,Str "reference.",Space,Str "It",Space,Str "need",Space,Str "not",Space,Str "be",Space,Str "placed",Space,Str "at",Space,Str "the",Space,Str "end",Space,Str "of",Space,Str "the",Space,Str "document."]],Space,Str "and",Space,Str "another.",Note [Para [Str "Here\8217s",Space,Str "the",Space,Str "long",Space,Str "note.",Space,Str "This",Space,Str "one",Space,Str "contains",Space,Str "multiple",Space,Str "blocks."],Para [Str "Subsequent",Space,Str "blocks",Space,Str "are",Space,Str "indented",Space,Str "to",Space,Str "show",Space,Str "that",Space,Str "they",Space,Str "belong",Space,Str "to",Space,Str "the",Space,Str "footnote",Space,Str "(as",Space,Str "with",Space,Str "list",Space,Str "items)."],CodeBlock ("",[],[]) "  { <code> }",Para [Str "If",Space,Str "you",Space,Str "want,",Space,Str "you",Space,Str "can",Space,Str "indent",Space,Str "every",Space,Str "line,",Space,Str "but",Space,Str "you",Space,Str "can",Space,Str "also",Space,Str "be",Space,Str "lazy",Space,Str "and",Space,Str "just",Space,Str "indent",Space,Str "the",Space,Str "first",Space,Str "line",Space,Str "of",Space,Str "each",Space,Str "block."]],Space,Str "This",Space,Str "should",Space,Emph [Str "not"],Space,Str "be",Space,Str "a",Space,Str "footnote",Space,Str "reference,",Space,Str "because",Space,Str "it",Space,Str "contains",Space,Str "a",Space,Str "space.[^my",Space,Str "note]",Space,Str "Here",Space,Str "is",Space,Str "an",Space,Str "inline",Space,Str "note.",Note [Para [Str "This",Space,Str "is",Space,Emph [Str "easier"],Space,Str "to",Space,Str "type.",Space,Str "Inline",Space,Str "notes",Space,Str "may",Space,Str "contain",Space,Link [Str "links"] ("http://google.com",""),Space,Str "and",Space,Code ("",[],[]) "]",Space,Str "verbatim",Space,Str "characters,",Space,Str "as",Space,Str "well",Space,Str "as",Space,Str "[bracketed",Space,Str "text]."]]]
 ,BlockQuote