Docbook, JATS, TEI writers: print INFO message when omitting interior header.

This only applies to section headers inside list items, e.g.,
which were otherwise silently omitted.

See #3750.

src/Text/Pandoc/Writers/Docbook.hs

@@ -217,8 +217,10 @@ blockToDocbook opts (Div (ident,_,_) bs) = do
     (if null ident
         then mempty
         else selfClosingTag "anchor" [("id", ident)]) $$ contents
-blockToDocbook _ (Header _ _ _) =
-  return empty -- should not occur after hierarchicalize
+blockToDocbook _ h@(Header _ _ _) = do
+  -- should not occur after hierarchicalize, except inside lists/blockquotes
+  report $ BlockNotRendered h
+  return empty
 blockToDocbook opts (Plain lst) = inlinesToDocbook opts lst
 -- title beginning with fig: indicates that the image is a figure
 blockToDocbook opts (Para [Image attr txt (src,'f':'i':'g':':':_)]) = do

src/Text/Pandoc/Writers/JATS.hs

@@ -203,8 +203,10 @@ blockToJATS opts (Div (ident,_,kvs) bs) = do
              [(k,v) | (k,v) <- kvs, k `elem` ["specific-use",
                  "content-type", "orientation", "position"]]
   return $ inTags True "boxed-text" attr contents
-blockToJATS _ (Header _ _ _) =
-  return empty -- should not occur after hierarchicalize
+blockToJATS _ h@(Header _ _ _) = do
+  -- should not occur after hierarchicalize, except inside lists/blockquotes
+  report $ BlockNotRendered h
+  return empty
 -- No Plain, everything needs to be in a block-level tag
 blockToJATS opts (Plain lst) = blockToJATS opts (Para lst)
 -- title beginning with fig: indicates that the image is a figure

src/Text/Pandoc/Writers/TEI.hs

@@ -159,11 +159,13 @@ blockToTEI opts (Div (ident,_,_) [Para lst]) = do
   let attribs = [("id", ident) | not (null ident)]
   inTags False "p" attribs <$> inlinesToTEI opts lst
 blockToTEI opts (Div _ bs) = blocksToTEI opts $ map plainToPara bs
-blockToTEI _ (Header _ _ _) = return empty
--- should not occur after hierarchicalize
+blockToTEI _ h@(Header _ _ _) = do
+  -- should not occur after hierarchicalize, except inside lists/blockquotes
+  report $ BlockNotRendered h
+  return empty
 -- For TEI simple, text must be within containing block element, so
--- we use plainToPara to ensure that Plain text ends up contained by
--- something.
+-- we use treat as Para to ensure that Plain text ends up contained by
+-- something:
 blockToTEI opts (Plain lst) = blockToTEI opts $ Para lst
 -- title beginning with fig: indicates that the image is a figure
 --blockToTEI opts (Para [Image attr txt (src,'f':'i':'g':':':_)]) =