Org reader: respect export setting disabling footnotes

Footnotes can be removed from the final document with the `#+OPTION:
f:nil` export setting.

src/Text/Pandoc/Readers/Org/ExportSettings.hs

@@ -49,7 +49,7 @@ exportSetting = choice
   , ignoredSetting "date"
   , booleanSetting "e" (\val es -> es { exportWithEntities = val })
   , booleanSetting "email" (\val es -> es { exportWithEmail = val })
-  , ignoredSetting "f"
+  , booleanSetting "f" (\val es -> es { exportWithFootnotes = val })
   , integerSetting "H" (\val es -> es { exportHeadlineLevels = val })
   , ignoredSetting "inline"
   , ignoredSetting "num"

src/Text/Pandoc/Readers/Org/Inlines.hs

@@ -378,7 +378,10 @@ citation = try $ do
               else rest
 
 footnote :: PandocMonad m => OrgParser m (F Inlines)
-footnote = try $ inlineNote <|> referencedNote
+footnote = try $ do
+  note <- inlineNote <|> referencedNote
+  withNote <- getExportSetting exportWithFootnotes
+  return $ if withNote then note else mempty
 
 inlineNote :: PandocMonad m => OrgParser m (F Inlines)
 inlineNote = try $ do

src/Text/Pandoc/Readers/Org/ParserState.hs

@@ -258,6 +258,7 @@ data ExportSettings = ExportSettings
   , exportWithCreator      :: Bool -- ^ Include creator in final meta-data
   , exportWithEmail        :: Bool -- ^ Include email in final meta-data
   , exportWithEntities     :: Bool -- ^ Include MathML-like entities
+  , exportWithFootnotes    :: Bool -- ^ Include footnotes
   , exportWithLatex        :: TeXExport -- ^ Handling of raw TeX commands
   , exportWithPlanning     :: Bool -- ^ Keep planning info after headlines
   , exportWithTags         :: Bool -- ^ Keep tags as part of headlines
@@ -281,6 +282,7 @@ defaultExportSettings = ExportSettings
   , exportWithCreator = True
   , exportWithEmail = True
   , exportWithEntities = True
+  , exportWithFootnotes = True
   , exportWithLatex = TeXExport
   , exportWithPlanning = False
   , exportWithTags = True

test/Tests/Readers/Org/Directive.hs

@@ -156,6 +156,22 @@ tests =
                   ] =?>
         para "Icelandic letter: \\thorn"
 
+    , testGroup "Option f"
+      [ "disable inline footnotes" =:
+        T.unlines [ "#+OPTIONS: f:nil"
+                  , "Funny![fn:funny:or not]"
+                  ] =?>
+        para "Funny!"
+
+      , "disable reference footnotes" =:
+        T.unlines [ "#+OPTIONS: f:nil"
+                  , "Burn everything[fn:1] down!"
+                  , ""
+                  , "[fn:2] Not quite everything."
+                  ] =?>
+        para "Burn everything down!"
+      ]
+
     , "disable inclusion of todo keywords" =:
         T.unlines [ "#+OPTIONS: todo:nil"
                   , "** DONE todo export"