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