Use walk, walkM in place of bottomUp, bottomUpM when possible.

They are significantly faster.

src/Text/Pandoc/PDF.hs

@@ -44,7 +44,7 @@ import Data.List (isInfixOf)
 import qualified Data.ByteString.Base64 as B64
 import qualified Text.Pandoc.UTF8 as UTF8
 import Text.Pandoc.Definition
-import Text.Pandoc.Generic (bottomUpM)
+import Text.Pandoc.Walk (walkM)
 import Text.Pandoc.Shared (fetchItem, warn)
 import Text.Pandoc.Options (WriterOptions(..))
 import Text.Pandoc.MIME (extensionFromMimeType)
@@ -73,7 +73,7 @@ handleImages :: String        -- ^ source directory/base URL
              -> FilePath      -- ^ temp dir to store images
              -> Pandoc        -- ^ document
              -> IO Pandoc
-handleImages baseURL tmpdir = bottomUpM (handleImage' baseURL tmpdir)
+handleImages baseURL tmpdir = walkM (handleImage' baseURL tmpdir)
 
 handleImage' :: String
              -> FilePath

src/Text/Pandoc/Readers/LaTeX.hs

@@ -35,7 +35,7 @@ module Text.Pandoc.Readers.LaTeX ( readLaTeX,
                                  ) where
 
 import Text.Pandoc.Definition
-import Text.Pandoc.Generic
+import Text.Pandoc.Walk
 import Text.Pandoc.Shared
 import Text.Pandoc.Options
 import Text.Pandoc.Biblio (processBiblio)
@@ -815,7 +815,7 @@ keyvals :: LP [(String, String)]
 keyvals = try $ char '[' *> manyTill keyval (char ']')
 
 alltt :: String -> LP Blocks
-alltt t = bottomUp strToCode <$> parseFromString blocks
+alltt t = walk strToCode <$> parseFromString blocks
   (substitute " " "\\ " $ substitute "%" "\\%" $
    concat $ intersperse "\\\\\n" $ lines t)
   where strToCode (Str s) = Code nullAttr s

src/Text/Pandoc/Readers/MediaWiki.hs

@@ -42,7 +42,7 @@ import Text.Pandoc.Options
 import Text.Pandoc.Readers.HTML ( htmlTag, isBlockTag, isCommentTag )
 import Text.Pandoc.XML ( fromEntities )
 import Text.Pandoc.Parsing hiding ( nested )
-import Text.Pandoc.Generic ( bottomUp )
+import Text.Pandoc.Walk ( walk )
 import Text.Pandoc.Shared ( stripTrailingNewlines, safeRead )
 import Data.Monoid (mconcat, mempty)
 import Control.Applicative ((<$>), (<*), (*>), (<$))
@@ -342,7 +342,7 @@ preformatted = try $ do
       spacesStr _        = False
   if F.all spacesStr contents
      then return mempty
-     else return $ B.para $ bottomUp strToCode contents
+     else return $ B.para $ walk strToCode contents
 
 header :: MWParser Blocks
 header = try $ do

src/Text/Pandoc/Shared.hs

@@ -518,7 +518,7 @@ isHeaderBlock _ = False
 
 -- | Shift header levels up or down.
 headerShift :: Int -> Pandoc -> Pandoc
-headerShift n = bottomUp shift
+headerShift n = walk shift
   where shift :: Block -> Block
         shift (Header level attr inner) = Header (level + n) attr inner
         shift x                         = x

src/Text/Pandoc/Writers/Docx.hs

@@ -45,6 +45,7 @@ import Text.Pandoc.Shared hiding (Element)
 import Text.Pandoc.Options
 import Text.Pandoc.Readers.TeXMath
 import Text.Pandoc.Highlighting ( highlight )
+import Text.Pandoc.Walk
 import Text.Highlighting.Kate.Types ()
 import Text.XML.Light
 import Text.TeXMath
@@ -108,7 +109,7 @@ writeDocx :: WriterOptions  -- ^ Writer options
           -> IO BL.ByteString
 writeDocx opts doc@(Pandoc meta _) = do
   let datadir = writerUserDataDir opts
-  let doc' = bottomUp (concatMap fixDisplayMath) doc
+  let doc' = walk fixDisplayMath doc
   refArchive <- liftM (toArchive . toLazy) $
        case writerReferenceDocx opts of
              Just f  -> B.readFile f
@@ -810,17 +811,17 @@ stripLeadingTrailingSpace = go . reverse . go . reverse
   where go (Space:xs) = xs
         go xs         = xs
 
-fixDisplayMath :: Block -> [Block]
+fixDisplayMath :: Block -> Block
 fixDisplayMath (Plain lst)
   | any isDisplayMath lst && not (all isDisplayMath lst) =
     -- chop into several paragraphs so each displaymath is its own
-    map (Plain . stripLeadingTrailingSpace) $
+    Div ("",["math"],[]) $ map (Plain . stripLeadingTrailingSpace) $
        groupBy (\x y -> (isDisplayMath x && isDisplayMath y) ||
                          not (isDisplayMath x || isDisplayMath y)) lst
 fixDisplayMath (Para lst)
   | any isDisplayMath lst && not (all isDisplayMath lst) =
     -- chop into several paragraphs so each displaymath is its own
-    map (Para . stripLeadingTrailingSpace) $
+    Div ("",["math"],[]) $ map (Para . stripLeadingTrailingSpace) $
        groupBy (\x y -> (isDisplayMath x && isDisplayMath y) ||
                          not (isDisplayMath x || isDisplayMath y)) lst
-fixDisplayMath x = [x]
+fixDisplayMath x = x

src/Text/Pandoc/Writers/EPUB.hs

@@ -48,7 +48,7 @@ import qualified Text.Pandoc.Shared as Shared
 import Text.Pandoc.Builder (fromList, setMeta)
 import Text.Pandoc.Options
 import Text.Pandoc.Definition
-import Text.Pandoc.Generic
+import Text.Pandoc.Walk
 import Control.Monad.State
 import Text.XML.Light hiding (ppTopElement)
 import Text.Pandoc.UUID
@@ -116,7 +116,7 @@ writeEPUB opts doc@(Pandoc meta _) = do
 
   -- handle pictures
   picsRef <- newIORef []
-  Pandoc _ blocks <- bottomUpM
+  Pandoc _ blocks <- walkM
        (transformInline opts' sourceDir picsRef) doc
   pics <- readIORef picsRef
   let readPicEntry entries (oldsrc, newsrc) = do
@@ -520,7 +520,7 @@ correlateRefs chapterHeaderLevel bs =
 -- Replace internal link references using the table produced
 -- by correlateRefs.
 replaceRefs :: [(String,String)] -> [Block] -> [Block]
-replaceRefs refTable = bottomUp replaceOneRef
+replaceRefs refTable = walk replaceOneRef
   where replaceOneRef x@(Link lab ('#':xs,tit)) =
           case lookup xs refTable of
                 Just url -> Link lab (url,tit)

src/Text/Pandoc/Writers/FB2.hs

@@ -45,7 +45,7 @@ import qualified Text.XML.Light.Cursor as XC
 import Text.Pandoc.Definition
 import Text.Pandoc.Options (WriterOptions(..), HTMLMathMethod(..), def)
 import Text.Pandoc.Shared (orderedListMarkers)
-import Text.Pandoc.Generic (bottomUp)
+import Text.Pandoc.Walk
 
 -- | Data to be written at the end of the document:
 -- (foot)notes, URLs, references, images.
@@ -423,6 +423,10 @@ indent = indentBlock
   indentLines ins = let lns = split isLineBreak ins :: [[Inline]]
                     in  intercalate [LineBreak] $ map ((Str spacer):) lns
 
+capitalize :: Inline -> Inline
+capitalize (Str xs) = Str $ map toUpper xs
+capitalize x = x
+
 -- | Convert a Pandoc's Inline element to FictionBook XML representation.
 toXml :: Inline -> FBM [Content]
 toXml (Str s) = return [txt s]
@@ -432,7 +436,7 @@ toXml (Strong ss) = list `liftM` wrap "strong" ss
 toXml (Strikeout ss) = list `liftM` wrap "strikethrough" ss
 toXml (Superscript ss) = list `liftM` wrap "sup" ss
 toXml (Subscript ss) = list `liftM` wrap "sub" ss
-toXml (SmallCaps ss) = cMapM toXml $ bottomUp (map toUpper) ss
+toXml (SmallCaps ss) = cMapM toXml $ walk capitalize ss
 toXml (Quoted SingleQuote ss) = do  -- FIXME: should be language-specific
   inner <- cMapM toXml ss
   return $ [txt "‘"] ++ inner ++ [txt "’"]

src/Text/Pandoc/Writers/LaTeX.hs

@@ -31,7 +31,6 @@ Conversion of 'Pandoc' format into LaTeX.
 module Text.Pandoc.Writers.LaTeX ( writeLaTeX ) where
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
-import Text.Pandoc.Generic
 import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
 import Text.Pandoc.Options
@@ -498,7 +497,7 @@ sectionHeader unnumbered ref level lst = do
   txt <- inlineListToLaTeX lst
   let noNote (Note _) = Str ""
       noNote x        = x
-  let lstNoNotes = bottomUp noNote lst
+  let lstNoNotes = walk noNote lst
   let star = if unnumbered then text "*" else empty
   -- footnotes in sections don't work unless you specify an optional
   -- argument:  \section[mysec]{mysec\footnote{blah}}

src/Text/Pandoc/Writers/Markdown.hs

@@ -32,7 +32,7 @@ Markdown:  <http://daringfireball.net/projects/markdown/>
 -}
 module Text.Pandoc.Writers.Markdown (writeMarkdown, writePlain) where
 import Text.Pandoc.Definition
-import Text.Pandoc.Generic
+import Text.Pandoc.Walk
 import Text.Pandoc.Templates (renderTemplate')
 import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
@@ -82,7 +82,7 @@ writePlain opts document =
     where document' = plainify document
 
 plainify :: Pandoc -> Pandoc
-plainify = bottomUp go
+plainify = walk go
   where go :: Inline -> Inline
         go (Emph xs) = SmallCaps xs
         go (Strong xs) = SmallCaps xs
@@ -643,13 +643,13 @@ inlineToMarkdown opts (Strikeout lst) = do
               then "~~" <> contents <> "~~"
               else "<s>" <> contents <> "</s>"
 inlineToMarkdown opts (Superscript lst) = do
-  let lst' = bottomUp escapeSpaces lst
+  let lst' = walk escapeSpaces lst
   contents <- inlineListToMarkdown opts lst'
   return $ if isEnabled Ext_superscript opts
               then "^" <> contents <> "^"
               else "<sup>" <> contents <> "</sup>"
 inlineToMarkdown opts (Subscript lst) = do
-  let lst' = bottomUp escapeSpaces lst
+  let lst' = walk escapeSpaces lst
   contents <- inlineListToMarkdown opts lst'
   return $ if isEnabled Ext_subscript opts
               then "~" <> contents <> "~"

src/Text/Pandoc/Writers/ODT.hs

@@ -39,7 +39,7 @@ import Text.Pandoc.Shared ( stringify, readDataFile, fetchItem, warn )
 import Text.Pandoc.ImageSize ( imageSize, sizeInPoints )
 import Text.Pandoc.MIME ( getMimeType )
 import Text.Pandoc.Definition
-import Text.Pandoc.Generic
+import Text.Pandoc.Walk
 import Text.Pandoc.Writers.OpenDocument ( writeOpenDocument )
 import Control.Monad (liftM)
 import Text.Pandoc.XML
@@ -63,7 +63,7 @@ writeODT opts doc@(Pandoc meta _) = do
   -- handle pictures
   picEntriesRef <- newIORef ([] :: [Entry])
   let sourceDir = writerSourceDirectory opts
-  doc' <- bottomUpM (transformPic sourceDir picEntriesRef) doc
+  doc' <- walkM (transformPic sourceDir picEntriesRef) doc
   let newContents = writeOpenDocument opts{writerWrapText = False} doc'
   epochtime <- floor `fmap` getPOSIXTime
   let contentEntry = toEntry "content.xml" epochtime $ fromStringLazy newContents

src/Text/Pandoc/Writers/RTF.hs

@@ -34,7 +34,7 @@ import Text.Pandoc.Shared
 import Text.Pandoc.Writers.Shared
 import Text.Pandoc.Readers.TeXMath
 import Text.Pandoc.Templates (renderTemplate')
-import Text.Pandoc.Generic (bottomUpM)
+import Text.Pandoc.Walk
 import Data.List ( isSuffixOf, intercalate )
 import Data.Char ( ord, chr, isDigit, toLower )
 import System.FilePath ( takeExtension )
@@ -70,7 +70,7 @@ rtfEmbedImage x = return x
 -- images embedded as encoded binary data.
 writeRTFWithEmbeddedImages :: WriterOptions -> Pandoc -> IO String
 writeRTFWithEmbeddedImages options doc =
-  writeRTF options `fmap` bottomUpM rtfEmbedImage doc
+  writeRTF options `fmap` walkM rtfEmbedImage doc
 
 -- | Convert Pandoc to a string in rich text format.
 writeRTF :: WriterOptions -> Pandoc -> String