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|
{-
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.Generic (bottomUp)
import Text.Pandoc.MIME (getMimeType)
import Text.Pandoc.UTF8 (toString)
import Text.Pandoc.Readers.Docx.Parse
import Text.Pandoc.Readers.Docx.Lists
import Data.Maybe (mapMaybe, isJust, fromJust)
import Data.List (delete, isPrefixOf, (\\), intersect)
import qualified Data.ByteString as BS
import qualified Data.ByteString.Lazy as B
import Data.ByteString.Base64 (encode)
import System.FilePath (combine)
readDocx :: ReaderOptions
-> B.ByteString
-> Pandoc
readDocx opts bytes =
case archiveToDocx (toArchive bytes) of
Just docx -> Pandoc nullMeta (docxToBlocks opts docx)
Nothing -> error $ "couldn't parse docx file"
runStyleToSpanAttr :: RunStyle -> (String, [String], [(String, String)])
runStyleToSpanAttr rPr = ("",
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 "strike") else Nothing,
if isSuperScript rPr then (Just "superscript") else Nothing,
if isSubScript rPr then (Just "subscript") else Nothing,
rStyle rPr],
case underline rPr of
Just fmt -> [("underline", fmt)]
_ -> []
)
parStyleToDivAttr :: ParagraphStyle -> (String, [String], [(String, String)])
parStyleToDivAttr pPr = ("",
pStyle pPr,
case indent pPr of
Just n -> [("indent", (show n))]
Nothing -> []
)
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
strNormalize :: [Inline] -> [Inline]
strNormalize [] = []
strNormalize (Str "" : ils) = strNormalize ils
strNormalize ((Str s) : (Str s') : l) = strNormalize ((Str (s++s')) : l)
strNormalize (il:ils) = il : (strNormalize ils)
stripSpaces :: [Inline] -> [Inline]
stripSpaces ils =
reverse $ dropWhile (Space ==) $ reverse $ dropWhile (Space ==) ils
blockNormalize :: Block -> Block
blockNormalize (Plain ils) = Plain $ strNormalize $ stripSpaces ils
blockNormalize (Para ils) = Para $ strNormalize $ stripSpaces ils
blockNormalize (Header n attr ils) =
Header n attr $ strNormalize $ stripSpaces ils
blockNormalize (Table ils align width hdr cells) =
Table (strNormalize $ stripSpaces ils) align width hdr cells
blockNormalize blk = blk
runToInlines :: ReaderOptions -> Docx -> Run -> [Inline]
runToInlines _ _ (Run rs runElems)
| isJust (rStyle rs) && (fromJust (rStyle rs)) `elem` codeSpans =
case runStyleToSpanAttr rs == ("", [], []) of
True -> [Str (runElemsToString runElems)]
False -> [Span (runStyleToSpanAttr rs) [Str (runElemsToString runElems)]]
| otherwise = case runStyleToSpanAttr rs == ("", [], []) of
True -> concatMap runElemToInlines runElems
False -> [Span (runStyleToSpanAttr rs) (concatMap runElemToInlines runElems)]
runToInlines opts docx@(Docx _ notes _ _ _ ) (Footnote fnId) =
case (getFootNote fnId notes) of
Just bodyParts ->
[Note [Div ("", ["footnote"], []) (map (bodyPartToBlock opts docx) bodyParts)]]
Nothing ->
[Note [Div ("", ["footnote"], []) []]]
runToInlines opts docx@(Docx _ notes _ _ _) (Endnote fnId) =
case (getEndNote fnId notes) of
Just bodyParts ->
[Note [Div ("", ["endnote"], []) (map (bodyPartToBlock opts docx) bodyParts)]]
Nothing ->
[Note [Div ("", ["endnote"], []) []]]
parPartToInlines :: ReaderOptions -> Docx -> ParPart -> [Inline]
parPartToInlines opts docx (PlainRun r) = runToInlines opts docx r
parPartToInlines _ _ (BookMark _ anchor) =
[Span (anchor, ["anchor"], []) []]
parPartToInlines _ (Docx _ _ _ rels _) (Drawing relid) =
case lookupRelationship relid rels of
Just target -> [Image [] (combine "word" target, "")]
Nothing -> [Image [] ("", "")]
parPartToInlines opts docx (InternalHyperLink anchor runs) =
[Link (concatMap (runToInlines opts docx) runs) ('#' : anchor, "")]
parPartToInlines opts docx@(Docx _ _ _ rels _) (ExternalHyperLink relid runs) =
case lookupRelationship relid rels of
Just target ->
[Link (concatMap (runToInlines opts docx) runs) (target, "")]
Nothing ->
[Link (concatMap (runToInlines opts docx) runs) ("", "")]
isAnchorSpan :: Inline -> Bool
isAnchorSpan (Span (ident, classes, kvs) ils) =
(not . null) ident &&
classes == ["anchor"] &&
null kvs &&
null ils
isAnchorSpan _ = False
dummyAnchors :: [String]
dummyAnchors = ["_GoBack"]
makeHeaderAnchors :: Block -> Block
makeHeaderAnchors h@(Header n (_, classes, kvs) ils) =
case filter isAnchorSpan ils of
[] -> h
(x@(Span (ident, _, _) _) : xs) ->
case ident `elem` dummyAnchors of
True -> h
False -> Header n (ident, classes, kvs) (ils \\ (x:xs))
_ -> h
makeHeaderAnchors blk = blk
parPartsToInlines :: ReaderOptions -> Docx -> [ParPart] -> [Inline]
parPartsToInlines opts docx parparts =
--
-- We're going to skip data-uri's for now. It should be an option,
-- not mandatory.
--
(if False -- TODO depend on option
then bottomUp (makeImagesSelfContained docx)
else id) $
bottomUp spanCorrect $
bottomUp spanTrim $
bottomUp spanReduce $
concatMap (parPartToInlines opts docx) parparts
cellToBlocks :: ReaderOptions -> Docx -> Cell -> [Block]
cellToBlocks opts docx (Cell bps) = map (bodyPartToBlock opts docx) bps
rowToBlocksList :: ReaderOptions -> Docx -> Row -> [[Block]]
rowToBlocksList opts docx (Row cells) = map (cellToBlocks opts docx) cells
bodyPartToBlock :: ReaderOptions -> Docx -> BodyPart -> Block
bodyPartToBlock opts docx (Paragraph pPr parparts) =
Div (parStyleToDivAttr pPr) [Para (parPartsToInlines opts docx parparts)]
bodyPartToBlock opts docx@(Docx _ _ numbering _ _) (ListItem pPr numId lvl parparts) =
let
kvs = case lookupLevel numId lvl numbering of
Just (_, fmt, txt, Just start) -> [ ("level", lvl)
, ("num-id", numId)
, ("format", fmt)
, ("text", txt)
, ("start", (show start))
]
Just (_, fmt, txt, Nothing) -> [ ("level", lvl)
, ("num-id", numId)
, ("format", fmt)
, ("text", txt)
]
Nothing -> []
in
Div
("", ["list-item"], kvs)
[bodyPartToBlock opts docx (Paragraph pPr parparts)]
bodyPartToBlock _ _ (Tbl _ _ _ []) =
Para []
bodyPartToBlock opts docx (Tbl cap _ look (r:rs)) =
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 opts docx r'
Nothing -> []
cells = map (rowToBlocksList opts docx) rows
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 = take size (repeat AlignDefault)
widths = take size (repeat 0) :: [Double]
in
Table caption alignments widths hdrCells cells
makeImagesSelfContained :: Docx -> Inline -> Inline
makeImagesSelfContained (Docx _ _ _ _ media) i@(Image alt (uri, title)) =
case lookup uri media of
Just bs -> case getMimeType uri of
Just mime -> let data_uri =
"data:" ++ mime ++ ";base64," ++ toString (encode $ BS.concat $ B.toChunks bs)
in
Image alt (data_uri, title)
Nothing -> i
Nothing -> i
makeImagesSelfContained _ inline = inline
bodyToBlocks :: ReaderOptions -> Docx -> Body -> [Block]
bodyToBlocks opts docx (Body bps) =
bottomUp removeEmptyPars $
bottomUp blockNormalize $
bottomUp spanRemove $
bottomUp divRemove $
map (makeHeaderAnchors) $
bottomUp divCorrect $
bottomUp divReduce $
bottomUp divCorrectPreReduce $
bottomUp blocksToDefinitions $
blocksToBullets $
map (bodyPartToBlock opts docx) bps
docxToBlocks :: ReaderOptions -> Docx -> [Block]
docxToBlocks opts d@(Docx (Document _ body) _ _ _ _) = bodyToBlocks opts d body
spanReduce :: [Inline] -> [Inline]
spanReduce [] = []
spanReduce ((Span (id1, classes1, kvs1) ils1) : ils)
| (id1, classes1, kvs1) == ("", [], []) = ils1 ++ (spanReduce ils)
spanReduce (s1@(Span (id1, classes1, kvs1) ils1) :
s2@(Span (id2, classes2, kvs2) ils2) :
ils) =
let classes' = classes1 `intersect` classes2
kvs' = kvs1 `intersect` kvs2
classes1' = classes1 \\ classes'
kvs1' = kvs1 \\ kvs'
classes2' = classes2 \\ classes'
kvs2' = kvs2 \\ kvs'
in
case null classes' && null kvs' of
True -> s1 : (spanReduce (s2 : ils))
False -> let attr' = ("", classes', kvs')
attr1' = (id1, classes1', kvs1')
attr2' = (id2, classes2', kvs2')
in
spanReduce (Span attr' [(Span attr1' ils1), (Span attr2' ils2)] :
ils)
spanReduce (il:ils) = il : (spanReduce ils)
ilToCode :: Inline -> String
ilToCode (Str s) = s
ilToCode _ = ""
spanRemove' :: Inline -> [Inline]
spanRemove' s@(Span (ident, classes, _) [])
-- "_GoBack" is automatically inserted. We don't want to keep it.
| classes == ["anchor"] && not (ident `elem` dummyAnchors) = [s]
spanRemove' (Span (_, _, kvs) ils) =
case lookup "underline" kvs of
Just val -> [Span ("", [], [("underline", val)]) ils]
Nothing -> ils
spanRemove' il = [il]
spanRemove :: [Inline] -> [Inline]
spanRemove = concatMap spanRemove'
spanTrim' :: Inline -> [Inline]
spanTrim' il@(Span _ []) = [il]
spanTrim' il@(Span attr (il':[]))
| il' == Space = [Span attr [], Space]
| otherwise = [il]
spanTrim' (Span attr ils)
| head ils == Space && last ils == Space =
[Space, Span attr (init $ tail ils), Space]
| head ils == Space = [Space, Span attr (tail ils)]
| last ils == Space = [Span attr (init ils), Space]
spanTrim' il = [il]
spanTrim :: [Inline] -> [Inline]
spanTrim = concatMap spanTrim'
spanCorrect' :: Inline -> [Inline]
spanCorrect' (Span ("", [], []) ils) = ils
spanCorrect' (Span (ident, classes, kvs) ils)
| "emph" `elem` classes =
[Emph $ spanCorrect' $ Span (ident, (delete "emph" classes), kvs) ils]
| "strong" `elem` classes =
[Strong $ spanCorrect' $ Span (ident, (delete "strong" classes), kvs) ils]
| "smallcaps" `elem` classes =
[SmallCaps $ spanCorrect' $ Span (ident, (delete "smallcaps" classes), kvs) ils]
| "strike" `elem` classes =
[Strikeout $ spanCorrect' $ Span (ident, (delete "strike" classes), kvs) ils]
| "superscript" `elem` classes =
[Superscript $ spanCorrect' $ Span (ident, (delete "superscript" classes), kvs) ils]
| "subscript" `elem` classes =
[Subscript $ spanCorrect' $ Span (ident, (delete "subscript" classes), kvs) ils]
| (not . null) (codeSpans `intersect` classes) =
[Code (ident, (classes \\ codeSpans), kvs) (init $ unlines $ map ilToCode ils)]
| otherwise =
[Span (ident, classes, kvs) ils]
spanCorrect' il = [il]
spanCorrect :: [Inline] -> [Inline]
spanCorrect = concatMap spanCorrect'
removeEmptyPars :: [Block] -> [Block]
removeEmptyPars blks = filter (\b -> b /= (Para [])) blks
divReduce :: [Block] -> [Block]
divReduce [] = []
divReduce ((Div (id1, classes1, kvs1) blks1) : blks)
| (id1, classes1, kvs1) == ("", [], []) = blks1 ++ (divReduce blks)
divReduce (d1@(Div (id1, classes1, kvs1) blks1) :
d2@(Div (id2, classes2, kvs2) blks2) :
blks) =
let classes' = classes1 `intersect` classes2
kvs' = kvs1 `intersect` kvs2
classes1' = classes1 \\ classes'
kvs1' = kvs1 \\ kvs'
classes2' = classes2 \\ classes'
kvs2' = kvs2 \\ kvs'
in
case null classes' && null kvs' of
True -> d1 : (divReduce (d2 : blks))
False -> let attr' = ("", classes', kvs')
attr1' = (id1, classes1', kvs1')
attr2' = (id2, classes2', kvs2')
in
divReduce (Div attr' [(Div attr1' blks1), (Div attr2' blks2)] :
blks)
divReduce (blk:blks) = blk : (divReduce blks)
isHeaderClass :: String -> Maybe Int
isHeaderClass s | "Heading" `isPrefixOf` s =
case reads (drop (length "Heading") s) :: [(Int, String)] of
[] -> Nothing
((n, "") : []) -> Just n
_ -> Nothing
isHeaderClass _ = Nothing
findHeaderClass :: [String] -> Maybe Int
findHeaderClass ss = case mapMaybe id $ map isHeaderClass ss of
[] -> Nothing
n : _ -> Just n
blksToInlines :: [Block] -> [Inline]
blksToInlines (Para ils : _) = ils
blksToInlines (Plain ils : _) = ils
blksToInlines _ = []
divCorrectPreReduce' :: Block -> [Block]
divCorrectPreReduce' (Div (ident, classes, kvs) blks)
| isJust $ findHeaderClass classes =
let n = fromJust $ findHeaderClass classes
in
[Header n (ident, delete ("Heading" ++ (show n)) classes, kvs) (blksToInlines blks)]
| otherwise = [Div (ident, classes, kvs) blks]
divCorrectPreReduce' blk = [blk]
divCorrectPreReduce :: [Block] -> [Block]
divCorrectPreReduce = concatMap divCorrectPreReduce'
blkToCode :: Block -> String
blkToCode (Para []) = ""
blkToCode (Para ((Code _ s):ils)) = s ++ (blkToCode (Para ils))
blkToCode (Para ((Span (_, classes, _) ils'): ils))
| (not . null) (codeSpans `intersect` classes) =
(init $ unlines $ map ilToCode ils') ++ (blkToCode (Para ils))
blkToCode _ = ""
divRemove' :: Block -> [Block]
divRemove' (Div (_, _, kvs) blks) =
case lookup "indent" kvs of
Just val -> [Div ("", [], [("indent", val)]) blks]
Nothing -> blks
divRemove' blk = [blk]
divRemove :: [Block] -> [Block]
divRemove = concatMap divRemove'
divCorrect' :: Block -> [Block]
divCorrect' b@(Div (ident, classes, kvs) blks)
| (not . null) (blockQuoteDivs `intersect` classes) =
[BlockQuote [Div (ident, classes \\ blockQuoteDivs, kvs) blks]]
| (not . null) (codeDivs `intersect` classes) =
[CodeBlock (ident, (classes \\ codeDivs), kvs) (init $ unlines $ map blkToCode blks)]
| otherwise =
case lookup "indent" kvs of
Just "0" -> [Div (ident, classes, filter (\kv -> fst kv /= "indent") kvs) blks]
Just _ ->
[BlockQuote [Div (ident, classes, filter (\kv -> fst kv /= "indent") kvs) blks]]
Nothing -> [b]
divCorrect' blk = [blk]
divCorrect :: [Block] -> [Block]
divCorrect = concatMap divCorrect'
|