9d0b390d48
Introduces a new function in Reducibles, concatR. The idea is that if we have two list of Reducibles (blocks or inlines), we can combine them and just perform the reduction on the joining parts (the last element of the first list, the first element of the second list). This is useful in cases where the two lists are already reduced, and we're only worried about the joining elements. This actually improves the efficiency a bit further, because concatR can be smart about empty lists.
559 lines
20 KiB
Haskell
559 lines
20 KiB
Haskell
{-# LANGUAGE PatternGuards #-}
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{-
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Copyright (C) 2014 Jesse Rosenthal <jrosenthal@jhu.edu>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-}
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{- |
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Module : Text.Pandoc.Readers.Docx
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Copyright : Copyright (C) 2014 Jesse Rosenthal
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License : GNU GPL, version 2 or above
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Maintainer : Jesse Rosenthal <jrosenthal@jhu.edu>
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Stability : alpha
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Portability : portable
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Conversion of Docx type (defined in Text.Pandoc.Readers.Docx.Parse)
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to 'Pandoc' document. -}
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{-
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Current state of implementation of Docx entities ([x] means
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implemented, [-] means partially implemented):
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* Blocks
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- [X] Para
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- [X] CodeBlock (styled with `SourceCode`)
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- [X] BlockQuote (styled with `Quote`, `BlockQuote`, or, optionally,
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indented)
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- [X] OrderedList
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- [X] BulletList
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- [X] DefinitionList (styled with adjacent `DefinitionTerm` and `Definition`)
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- [X] Header (styled with `Heading#`)
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- [ ] HorizontalRule
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- [-] Table (column widths and alignments not yet implemented)
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* Inlines
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- [X] Str
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- [X] Emph (From italics. `underline` currently read as span. In
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future, it might optionally be emph as well)
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- [X] Strong
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- [X] Strikeout
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- [X] Superscript
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- [X] Subscript
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- [X] SmallCaps
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- [ ] Quoted
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- [ ] Cite
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- [X] Code (styled with `VerbatimChar`)
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- [X] Space
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- [X] LineBreak (these are invisible in Word: entered with Shift-Return)
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- [ ] Math
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- [X] Link (links to an arbitrary bookmark create a span with the target as
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id and "anchor" class)
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- [-] Image (Links to path in archive. Future option for
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data-encoded URI likely.)
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- [X] Note (Footnotes and Endnotes are silently combined.)
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-}
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module Text.Pandoc.Readers.Docx
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( readDocx
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) where
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import Codec.Archive.Zip
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import Text.Pandoc.Definition
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import Text.Pandoc.Options
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import Text.Pandoc.Builder (text, toList)
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import Text.Pandoc.Walk
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import Text.Pandoc.Readers.Docx.Parse
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import Text.Pandoc.Readers.Docx.Lists
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import Text.Pandoc.Readers.Docx.Reducible
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import Text.Pandoc.Shared
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import Text.Pandoc.MediaBag (insertMedia, MediaBag)
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import Data.Maybe (mapMaybe)
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import Data.List (delete, stripPrefix, (\\), intersect)
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import Data.Monoid
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import Text.TeXMath (writeTeX)
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import Data.Default (Default)
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import qualified Data.ByteString.Lazy as B
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import qualified Data.Map as M
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import Control.Monad.Reader
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import Control.Monad.State
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import Control.Applicative ((<$>))
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readDocx :: ReaderOptions
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-> B.ByteString
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-> (Pandoc, MediaBag)
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readDocx opts bytes =
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case archiveToDocx (toArchive bytes) of
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Right docx -> (Pandoc meta blks, mediaBag) where
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(meta, blks, mediaBag) = (docxToOutput opts docx)
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Left _ -> error $ "couldn't parse docx file"
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data DState = DState { docxAnchorMap :: M.Map String String
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, docxMediaBag :: MediaBag
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, docxDropCap :: [Inline]
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}
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instance Default DState where
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def = DState { docxAnchorMap = M.empty
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, docxMediaBag = mempty
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, docxDropCap = []
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}
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data DEnv = DEnv { docxOptions :: ReaderOptions
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, docxInHeaderBlock :: Bool }
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instance Default DEnv where
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def = DEnv def False
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type DocxContext = ReaderT DEnv (State DState)
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evalDocxContext :: DocxContext a -> DEnv -> DState -> a
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evalDocxContext ctx env st = evalState (runReaderT ctx env) st
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concatMapM :: (Monad m) => (a -> m [b]) -> [a] -> m [b]
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concatMapM f xs = liftM concat (mapM f xs)
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-- This is empty, but we put it in for future-proofing.
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spansToKeep :: [String]
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spansToKeep = []
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divsToKeep :: [String]
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divsToKeep = ["list-item", "Definition", "DefinitionTerm"]
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metaStyles :: M.Map String String
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metaStyles = M.fromList [ ("Title", "title")
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, ("Subtitle", "subtitle")
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, ("Author", "author")
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, ("Date", "date")
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, ("Abstract", "abstract")]
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sepBodyParts :: [BodyPart] -> ([BodyPart], [BodyPart])
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sepBodyParts = span (\bp -> (isMetaPar bp || isEmptyPar bp))
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isMetaPar :: BodyPart -> Bool
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isMetaPar (Paragraph pPr _) =
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not $ null $ intersect (pStyle pPr) (M.keys metaStyles)
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isMetaPar _ = False
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isEmptyPar :: BodyPart -> Bool
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isEmptyPar (Paragraph _ parParts) =
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all isEmptyParPart parParts
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where
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isEmptyParPart (PlainRun (Run _ runElems)) = all isEmptyElem runElems
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isEmptyParPart _ = False
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isEmptyElem (TextRun s) = trim s == ""
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isEmptyElem _ = True
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isEmptyPar _ = False
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bodyPartsToMeta' :: [BodyPart] -> DocxContext (M.Map String MetaValue)
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bodyPartsToMeta' [] = return M.empty
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bodyPartsToMeta' (bp : bps)
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| (Paragraph pPr parParts) <- bp
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, (c : _)<- intersect (pStyle pPr) (M.keys metaStyles)
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, (Just metaField) <- M.lookup c metaStyles = do
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inlines <- parPartsToInlines parParts
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remaining <- bodyPartsToMeta' bps
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let
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f (MetaInlines ils) (MetaInlines ils') = MetaBlocks [Para ils, Para ils']
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f (MetaInlines ils) (MetaBlocks blks) = MetaBlocks ((Para ils) : blks)
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f m (MetaList mv) = MetaList (m : mv)
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f m n = MetaList [m, n]
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return $ M.insertWith f metaField (MetaInlines inlines) remaining
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bodyPartsToMeta' (_ : bps) = bodyPartsToMeta' bps
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bodyPartsToMeta :: [BodyPart] -> DocxContext Meta
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bodyPartsToMeta bps = do
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mp <- bodyPartsToMeta' bps
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let mp' =
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case M.lookup "author" mp of
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Just mv -> M.insert "author" (fixAuthors mv) mp
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Nothing -> mp
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return $ Meta mp'
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fixAuthors :: MetaValue -> MetaValue
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fixAuthors (MetaBlocks blks) =
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MetaList $ map g $ filter f blks
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where f (Para _) = True
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f _ = False
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g (Para ils) = MetaInlines ils
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g _ = MetaInlines []
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fixAuthors mv = mv
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runStyleToContainers :: RunStyle -> [Container Inline]
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runStyleToContainers rPr =
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let spanClassToContainers :: String -> [Container Inline]
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spanClassToContainers s | s `elem` codeSpans =
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[Container $ (\ils -> Code ("", [], []) (concatMap ilToCode ils))]
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spanClassToContainers s | s `elem` spansToKeep =
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[Container $ Span ("", [s], [])]
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spanClassToContainers _ = []
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classContainers = case rStyle rPr of
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Nothing -> []
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Just s -> spanClassToContainers s
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formatters = map Container $ mapMaybe id
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[ if isBold rPr then (Just Strong) else Nothing
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, if isItalic rPr then (Just Emph) else Nothing
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, if isSmallCaps rPr then (Just SmallCaps) else Nothing
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, if isStrike rPr then (Just Strikeout) else Nothing
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, if isSuperScript rPr then (Just Superscript) else Nothing
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, if isSubScript rPr then (Just Subscript) else Nothing
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, rUnderline rPr >>=
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(\f -> if f == "single" then (Just Emph) else Nothing)
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]
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in
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classContainers ++ formatters
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parStyleToContainers :: ParagraphStyle -> [Container Block]
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parStyleToContainers pPr | (c:cs) <- pStyle pPr, Just n <- isHeaderClass c =
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[Container $ \_ -> Header n ("", delete ("Heading" ++ show n) cs, []) []]
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parStyleToContainers pPr | (c:cs) <- pStyle pPr, c `elem` divsToKeep =
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let pPr' = pPr { pStyle = cs }
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in
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(Container $ Div ("", [c], [])) : (parStyleToContainers pPr')
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parStyleToContainers pPr | (c:cs) <- pStyle pPr, c `elem` codeDivs =
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-- This is a bit of a cludge. We make the codeblock from the raw
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-- parparts in bodyPartToBlocks. But we need something to match against.
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let pPr' = pPr { pStyle = cs }
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in
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(Container $ \_ -> CodeBlock ("", [], []) "") : (parStyleToContainers pPr')
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parStyleToContainers pPr | (c:cs) <- pStyle pPr, c `elem` listParagraphDivs =
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let pPr' = pPr { pStyle = cs, indentation = Nothing}
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in
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(Container $ Div ("", [c], [])) : (parStyleToContainers pPr')
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parStyleToContainers pPr | (c:cs) <- pStyle pPr, c `elem` blockQuoteDivs =
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let pPr' = pPr { pStyle = cs \\ blockQuoteDivs }
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in
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(Container BlockQuote) : (parStyleToContainers pPr')
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parStyleToContainers pPr | (_:cs) <- pStyle pPr =
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let pPr' = pPr { pStyle = cs}
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in
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parStyleToContainers pPr'
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parStyleToContainers pPr | null (pStyle pPr),
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Just left <- indentation pPr >>= leftParIndent,
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Just hang <- indentation pPr >>= hangingParIndent =
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let pPr' = pPr { indentation = Nothing }
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in
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case (left - hang) > 0 of
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True -> (Container BlockQuote) : (parStyleToContainers pPr')
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False -> parStyleToContainers pPr'
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parStyleToContainers pPr | null (pStyle pPr),
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Just left <- indentation pPr >>= leftParIndent =
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let pPr' = pPr { indentation = Nothing }
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in
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case left > 0 of
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True -> (Container BlockQuote) : (parStyleToContainers pPr')
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False -> parStyleToContainers pPr'
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parStyleToContainers _ = []
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strToInlines :: String -> [Inline]
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strToInlines = toList . text
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codeSpans :: [String]
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codeSpans = ["VerbatimChar"]
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blockQuoteDivs :: [String]
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blockQuoteDivs = ["Quote", "BlockQuote"]
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codeDivs :: [String]
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codeDivs = ["SourceCode"]
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runElemToInlines :: RunElem -> [Inline]
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runElemToInlines (TextRun s) = strToInlines s
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runElemToInlines (LnBrk) = [LineBreak]
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runElemToInlines (Tab) = [Space]
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runElemToString :: RunElem -> String
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runElemToString (TextRun s) = s
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runElemToString (LnBrk) = ['\n']
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runElemToString (Tab) = ['\t']
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runElemsToString :: [RunElem] -> String
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runElemsToString = concatMap runElemToString
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runToString :: Run -> String
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runToString (Run _ runElems) = runElemsToString runElems
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runToString _ = ""
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parPartToString :: ParPart -> String
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parPartToString (PlainRun run) = runToString run
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parPartToString (InternalHyperLink _ runs) = concatMap runToString runs
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parPartToString (ExternalHyperLink _ runs) = concatMap runToString runs
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parPartToString _ = ""
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inlineCodeContainer :: Container Inline -> Bool
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inlineCodeContainer (Container f) = case f [] of
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Code _ "" -> True
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_ -> False
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inlineCodeContainer _ = False
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runToInlines :: Run -> DocxContext [Inline]
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runToInlines (Run rs runElems)
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| any inlineCodeContainer (runStyleToContainers rs) =
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return $
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rebuild (runStyleToContainers rs) $ [Str $ runElemsToString runElems]
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| otherwise =
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return $
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rebuild (runStyleToContainers rs) (concatMap runElemToInlines runElems)
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runToInlines (Footnote bps) =
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concatMapM bodyPartToBlocks bps >>= (\blks -> return [Note blks])
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runToInlines (Endnote bps) =
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concatMapM bodyPartToBlocks bps >>= (\blks -> return [Note blks])
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runToInlines (InlineDrawing fp bs) = do
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mediaBag <- gets docxMediaBag
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modify $ \s -> s { docxMediaBag = insertMedia fp Nothing bs mediaBag }
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return [Image [] (fp, "")]
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parPartToInlines :: ParPart -> DocxContext [Inline]
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parPartToInlines (PlainRun r) = runToInlines r
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parPartToInlines (Insertion _ author date runs) = do
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opts <- asks docxOptions
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case readerTrackChanges opts of
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AcceptChanges -> concatMapM runToInlines runs >>= return
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RejectChanges -> return []
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AllChanges -> do
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ils <- (concatMapM runToInlines runs)
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return [Span
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("", ["insertion"], [("author", author), ("date", date)])
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ils]
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parPartToInlines (Deletion _ author date runs) = do
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opts <- asks docxOptions
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case readerTrackChanges opts of
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AcceptChanges -> return []
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RejectChanges -> concatMapM runToInlines runs >>= return
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AllChanges -> do
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ils <- concatMapM runToInlines runs
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return [Span
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("", ["deletion"], [("author", author), ("date", date)])
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ils]
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parPartToInlines (BookMark _ anchor) | anchor `elem` dummyAnchors = return []
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parPartToInlines (BookMark _ anchor) =
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-- We record these, so we can make sure not to overwrite
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-- user-defined anchor links with header auto ids.
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do
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-- get whether we're in a header.
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inHdrBool <- asks docxInHeaderBlock
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-- Get the anchor map.
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anchorMap <- gets docxAnchorMap
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-- We don't want to rewrite if we're in a header, since we'll take
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-- care of that later, when we make the header anchor. If the
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-- bookmark were already in uniqueIdent form, this would lead to a
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-- duplication. Otherwise, we check to see if the id is already in
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-- there. Rewrite if necessary. This will have the possible effect
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-- of rewriting user-defined anchor links. However, since these
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-- are not defined in pandoc, it seems like a necessary evil to
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-- avoid an extra pass.
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let newAnchor =
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if not inHdrBool && anchor `elem` (M.elems anchorMap)
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then uniqueIdent [Str anchor] (M.elems anchorMap)
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else anchor
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unless inHdrBool
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(modify $ \s -> s { docxAnchorMap = M.insert anchor newAnchor anchorMap})
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return [Span (newAnchor, ["anchor"], []) []]
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parPartToInlines (Drawing fp bs) = do
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mediaBag <- gets docxMediaBag
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modify $ \s -> s { docxMediaBag = insertMedia fp Nothing bs mediaBag }
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return [Image [] (fp, "")]
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parPartToInlines (InternalHyperLink anchor runs) = do
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ils <- concatMapM runToInlines runs
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return [Link ils ('#' : anchor, "")]
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parPartToInlines (ExternalHyperLink target runs) = do
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ils <- concatMapM runToInlines runs
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return [Link ils (target, "")]
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parPartToInlines (PlainOMath exps) = do
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return [Math InlineMath (writeTeX exps)]
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isAnchorSpan :: Inline -> Bool
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isAnchorSpan (Span (ident, classes, kvs) ils) =
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(not . null) ident &&
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classes == ["anchor"] &&
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null kvs &&
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null ils
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isAnchorSpan _ = False
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dummyAnchors :: [String]
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dummyAnchors = ["_GoBack"]
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makeHeaderAnchor :: Block -> DocxContext Block
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-- If there is an anchor already there (an anchor span in the header,
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-- to be exact), we rename and associate the new id with the old one.
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makeHeaderAnchor (Header n (_, classes, kvs) ils)
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| (x : xs) <- filter isAnchorSpan ils
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, (Span (ident, _, _) _) <- x
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, notElem ident dummyAnchors =
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do
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hdrIDMap <- gets docxAnchorMap
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let newIdent = uniqueIdent ils (M.elems hdrIDMap)
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modify $ \s -> s {docxAnchorMap = M.insert ident newIdent hdrIDMap}
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return $ Header n (newIdent, classes, kvs) (ils \\ (x:xs))
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-- Otherwise we just give it a name, and register that name (associate
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-- it with itself.)
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makeHeaderAnchor (Header n (_, classes, kvs) ils) =
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do
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hdrIDMap <- gets docxAnchorMap
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let newIdent = uniqueIdent ils (M.elems hdrIDMap)
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modify $ \s -> s {docxAnchorMap = M.insert newIdent newIdent hdrIDMap}
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return $ Header n (newIdent, classes, kvs) ils
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makeHeaderAnchor blk = return blk
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parPartsToInlines :: [ParPart] -> DocxContext [Inline]
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parPartsToInlines parparts = do
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ils <- concatMapM parPartToInlines parparts
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return $ reduceList $ ils
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cellToBlocks :: Cell -> DocxContext [Block]
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cellToBlocks (Cell bps) = concatMapM bodyPartToBlocks bps
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rowToBlocksList :: Row -> DocxContext [[Block]]
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rowToBlocksList (Row cells) = mapM cellToBlocks cells
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isBlockCodeContainer :: Container Block -> Bool
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isBlockCodeContainer (Container f) | CodeBlock _ _ <- f [] = True
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isBlockCodeContainer _ = False
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isHeaderContainer :: Container Block -> Bool
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isHeaderContainer (Container f) | Header _ _ _ <- f [] = True
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isHeaderContainer _ = False
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bodyPartToBlocks :: BodyPart -> DocxContext [Block]
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bodyPartToBlocks (Paragraph pPr parparts)
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| any isBlockCodeContainer (parStyleToContainers pPr) =
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let
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otherConts = filter (not . isBlockCodeContainer) (parStyleToContainers pPr)
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in
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return $
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rebuild
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otherConts
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[CodeBlock ("", [], []) (concatMap parPartToString parparts)]
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bodyPartToBlocks (Paragraph pPr parparts)
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| any isHeaderContainer (parStyleToContainers pPr) = do
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ils <- normalizeSpaces <$> local (\s -> s{docxInHeaderBlock = True})
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(parPartsToInlines parparts)
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let (Container hdrFun) = head $ filter isHeaderContainer (parStyleToContainers pPr)
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Header n attr _ = hdrFun []
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hdr <- makeHeaderAnchor $ Header n attr ils
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return [hdr]
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bodyPartToBlocks (Paragraph pPr parparts) = do
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ils <- parPartsToInlines parparts >>= (return . normalizeSpaces)
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dropIls <- gets docxDropCap
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let ils' = concatR dropIls ils
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|
if dropCap pPr
|
|
then do modify $ \s -> s { docxDropCap = ils' }
|
|
return []
|
|
else do modify $ \s -> s { docxDropCap = [] }
|
|
return $ case ils' of
|
|
[] -> []
|
|
_ -> rebuild
|
|
(parStyleToContainers pPr)
|
|
[Para $ ils']
|
|
bodyPartToBlocks (ListItem pPr numId lvl levelInfo parparts) = do
|
|
let
|
|
kvs = case levelInfo of
|
|
(_, fmt, txt, Just start) -> [ ("level", lvl)
|
|
, ("num-id", numId)
|
|
, ("format", fmt)
|
|
, ("text", txt)
|
|
, ("start", (show start))
|
|
]
|
|
|
|
(_, fmt, txt, Nothing) -> [ ("level", lvl)
|
|
, ("num-id", numId)
|
|
, ("format", fmt)
|
|
, ("text", txt)
|
|
]
|
|
blks <- bodyPartToBlocks (Paragraph pPr parparts)
|
|
return $ [Div ("", ["list-item"], kvs) blks]
|
|
bodyPartToBlocks (Tbl _ _ _ []) =
|
|
return [Para []]
|
|
bodyPartToBlocks (Tbl cap _ look (r:rs)) = do
|
|
let caption = strToInlines cap
|
|
(hdr, rows) = case firstRowFormatting look of
|
|
True -> (Just r, rs)
|
|
False -> (Nothing, r:rs)
|
|
hdrCells <- case hdr of
|
|
Just r' -> rowToBlocksList r'
|
|
Nothing -> return []
|
|
|
|
cells <- mapM rowToBlocksList rows
|
|
|
|
let size = case null hdrCells of
|
|
True -> length $ head cells
|
|
False -> length $ hdrCells
|
|
--
|
|
-- The two following variables (horizontal column alignment and
|
|
-- relative column widths) go to the default at the
|
|
-- moment. Width information is in the TblGrid field of the Tbl,
|
|
-- so should be possible. Alignment might be more difficult,
|
|
-- since there doesn't seem to be a column entity in docx.
|
|
alignments = replicate size AlignDefault
|
|
widths = replicate size 0 :: [Double]
|
|
|
|
return [Table caption alignments widths hdrCells cells]
|
|
bodyPartToBlocks (OMathPara e) = do
|
|
return [Para [Math DisplayMath (writeTeX e)]]
|
|
|
|
|
|
-- replace targets with generated anchors.
|
|
rewriteLink :: Inline -> DocxContext Inline
|
|
rewriteLink l@(Link ils ('#':target, title)) = do
|
|
anchorMap <- gets docxAnchorMap
|
|
return $ case M.lookup target anchorMap of
|
|
Just newTarget -> (Link ils ('#':newTarget, title))
|
|
Nothing -> l
|
|
rewriteLink il = return il
|
|
|
|
bodyToOutput :: Body -> DocxContext (Meta, [Block], MediaBag)
|
|
bodyToOutput (Body bps) = do
|
|
let (metabps, blkbps) = sepBodyParts bps
|
|
meta <- bodyPartsToMeta metabps
|
|
blks <- concatMapM bodyPartToBlocks blkbps >>=
|
|
walkM rewriteLink
|
|
mediaBag <- gets docxMediaBag
|
|
return $ (meta,
|
|
blocksToDefinitions $ blocksToBullets $ blks,
|
|
mediaBag)
|
|
|
|
docxToOutput :: ReaderOptions -> Docx -> (Meta, [Block], MediaBag)
|
|
docxToOutput opts (Docx (Document _ body)) =
|
|
let dEnv = def { docxOptions = opts} in
|
|
evalDocxContext (bodyToOutput body) dEnv def
|
|
|
|
|
|
ilToCode :: Inline -> String
|
|
ilToCode (Str s) = s
|
|
ilToCode Space = " "
|
|
ilToCode _ = ""
|
|
|
|
isHeaderClass :: String -> Maybe Int
|
|
isHeaderClass s | Just s' <- stripPrefix "Heading" s =
|
|
case reads s' :: [(Int, String)] of
|
|
[] -> Nothing
|
|
((n, "") : []) -> Just n
|
|
_ -> Nothing
|
|
isHeaderClass _ = Nothing
|