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|
{-# LANGUAGE PatternGuards, MultiWayIf, OverloadedStrings #-}
{-
Copyright (C) 2017-2018 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.Writers.Powerpoint
Copyright : Copyright (C) 2017-2018 Jesse Rosenthal
License : GNU GPL, version 2 or above
Maintainer : Jesse Rosenthal <jrosenthal@jhu.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to powerpoint (pptx).
-}
module Text.Pandoc.Writers.Powerpoint (writePowerpoint) where
import Control.Monad.Except (throwError)
import Control.Monad.Reader
import Control.Monad.State
import Codec.Archive.Zip
import Data.List (intercalate, stripPrefix, isPrefixOf, nub)
import Data.Default
import Data.Time.Clock (UTCTime)
import Data.Time.Clock.POSIX (utcTimeToPOSIXSeconds, posixSecondsToUTCTime)
import System.FilePath.Posix (splitDirectories, splitExtension)
import Text.XML.Light
import qualified Text.XML.Light.Cursor as XMLC
import Text.Pandoc.Definition
import qualified Text.Pandoc.UTF8 as UTF8
import Text.Pandoc.Class (PandocMonad)
import Text.Pandoc.Error (PandocError(..))
import Text.Pandoc.Slides (getSlideLevel)
import qualified Text.Pandoc.Class as P
import Text.Pandoc.Options
import Text.Pandoc.MIME
import Text.Pandoc.Logging
import qualified Data.ByteString.Lazy as BL
import Text.Pandoc.Walk
import Text.Pandoc.Writers.Shared (fixDisplayMath)
import Text.Pandoc.Writers.OOXML
import qualified Data.Map as M
import Data.Maybe (mapMaybe, listToMaybe, maybeToList)
import Text.Pandoc.ImageSize
import Control.Applicative ((<|>))
import Text.TeXMath
import Text.Pandoc.Writers.Math (convertMath)
writePowerpoint :: (PandocMonad m)
=> WriterOptions -- ^ Writer options
-> Pandoc -- ^ Document to convert
-> m BL.ByteString
writePowerpoint opts (Pandoc meta blks) = do
let blks' = walk fixDisplayMath blks
distArchive <- (toArchive . BL.fromStrict) <$>
P.readDefaultDataFile "reference.pptx"
refArchive <- case writerReferenceDoc opts of
Just f -> toArchive <$> P.readFileLazy f
Nothing -> (toArchive . BL.fromStrict) <$>
P.readDataFile "reference.pptx"
utctime <- P.getCurrentTime
let env = def { envMetadata = meta
, envRefArchive = refArchive
, envDistArchive = distArchive
, envUTCTime = utctime
, envOpts = opts
, envSlideLevel = case writerSlideLevel opts of
Just n -> n
Nothing -> getSlideLevel blks'
}
runP env def $ do pres <- blocksToPresentation blks'
archv <- presentationToArchive pres
return $ fromArchive archv
concatMapM :: (Monad m) => (a -> m [b]) -> [a] -> m [b]
concatMapM f xs = liftM concat (mapM f xs)
data WriterEnv = WriterEnv { envMetadata :: Meta
, envRunProps :: RunProps
, envParaProps :: ParaProps
, envSlideLevel :: Int
, envRefArchive :: Archive
, envDistArchive :: Archive
, envUTCTime :: UTCTime
, envOpts :: WriterOptions
, envPresentationSize :: PresentationSize
, envSlideHasHeader :: Bool
, envInList :: Bool
, envInNoteSlide :: Bool
}
deriving (Show)
instance Default WriterEnv where
def = WriterEnv { envMetadata = mempty
, envRunProps = def
, envParaProps = def
, envSlideLevel = 2
, envRefArchive = emptyArchive
, envDistArchive = emptyArchive
, envUTCTime = posixSecondsToUTCTime 0
, envOpts = def
, envPresentationSize = def
, envSlideHasHeader = False
, envInList = False
, envInNoteSlide = False
}
data MediaInfo = MediaInfo { mInfoFilePath :: FilePath
, mInfoLocalId :: Int
, mInfoGlobalId :: Int
, mInfoMimeType :: Maybe MimeType
, mInfoExt :: Maybe String
, mInfoCaption :: Bool
} deriving (Show, Eq)
data WriterState = WriterState { stCurSlideId :: Int
-- the difference between the number at
-- the end of the slide file name and
-- the rId number
, stSlideIdOffset :: Int
, stLinkIds :: M.Map Int (M.Map Int (URL, String))
-- (FP, Local ID, Global ID, Maybe Mime)
, stMediaIds :: M.Map Int [MediaInfo]
, stMediaGlobalIds :: M.Map FilePath Int
, stNoteIds :: M.Map Int [Block]
} deriving (Show, Eq)
instance Default WriterState where
def = WriterState { stCurSlideId = 0
, stSlideIdOffset = 1
, stLinkIds = mempty
, stMediaIds = mempty
, stMediaGlobalIds = mempty
, stNoteIds = mempty
}
type P m = ReaderT WriterEnv (StateT WriterState m)
runP :: Monad m => WriterEnv -> WriterState -> P m a -> m a
runP env st p = evalStateT (runReaderT p env) st
type Pixels = Integer
data Presentation = Presentation PresentationSize [Slide]
deriving (Show)
data PresentationSize = PresentationSize { presSizeWidth :: Pixels
, presSizeRatio :: PresentationRatio
}
deriving (Show, Eq)
data PresentationRatio = Ratio4x3
| Ratio16x9
| Ratio16x10
deriving (Show, Eq)
-- Note that right now we're only using Ratio4x3.
getPageHeight :: PresentationSize -> Pixels
getPageHeight sz = case presSizeRatio sz of
Ratio4x3 -> floor (((fromInteger (presSizeWidth sz)) / 4) * 3 :: Double)
Ratio16x9 -> floor (((fromInteger (presSizeWidth sz)) / 16) * 9 :: Double)
Ratio16x10 -> floor (((fromInteger (presSizeWidth sz)) / 16) * 10 :: Double)
instance Default PresentationSize where
def = PresentationSize 720 Ratio4x3
data Slide = MetadataSlide { metadataSlideTitle :: [ParaElem]
, metadataSlideSubtitle :: [ParaElem]
, metadataSlideAuthors :: [[ParaElem]]
, metadataSlideDate :: [ParaElem]
}
| TitleSlide { titleSlideHeader :: [ParaElem]}
| ContentSlide { contentSlideHeader :: [ParaElem]
, contentSlideContent :: [Shape]
}
| TwoColumnSlide { twoColumnSlideHeader :: [ParaElem]
, twoColumnSlideLeft :: [Shape]
, twoColumnSlideRight :: [Shape]
}
deriving (Show, Eq)
data SlideElement = SlideElement Pixels Pixels Pixels Pixels Shape
deriving (Show, Eq)
data Shape = Pic PicProps FilePath Text.Pandoc.Definition.Attr [ParaElem]
| GraphicFrame [Graphic] [ParaElem]
| TextBox [Paragraph]
deriving (Show, Eq)
type Cell = [Paragraph]
data TableProps = TableProps { tblPrFirstRow :: Bool
, tblPrBandRow :: Bool
} deriving (Show, Eq)
type ColWidth = Integer
data Graphic = Tbl TableProps [ColWidth] [Cell] [[Cell]]
deriving (Show, Eq)
data Paragraph = Paragraph { paraProps :: ParaProps
, paraElems :: [ParaElem]
} deriving (Show, Eq)
data HeaderType = TitleHeader | SlideHeader | InternalHeader Int
deriving (Show, Eq)
autoNumberingToType :: ListAttributes -> String
autoNumberingToType (_, numStyle, numDelim) =
typeString ++ delimString
where
typeString = case numStyle of
Decimal -> "arabic"
UpperAlpha -> "alphaUc"
LowerAlpha -> "alphaLc"
UpperRoman -> "romanUc"
LowerRoman -> "romanLc"
_ -> "arabic"
delimString = case numDelim of
Period -> "Period"
OneParen -> "ParenR"
TwoParens -> "ParenBoth"
_ -> "Period"
data BulletType = Bullet
| AutoNumbering ListAttributes
deriving (Show, Eq)
data Algnment = AlgnLeft | AlgnRight | AlgnCenter
deriving (Show, Eq)
data ParaProps = ParaProps { pPropHeaderType :: Maybe HeaderType
, pPropMarginLeft :: Maybe Pixels
, pPropMarginRight :: Maybe Pixels
, pPropLevel :: Int
, pPropBullet :: Maybe BulletType
, pPropAlign :: Maybe Algnment
} deriving (Show, Eq)
instance Default ParaProps where
def = ParaProps { pPropHeaderType = Nothing
, pPropMarginLeft = Just 0
, pPropMarginRight = Just 0
, pPropLevel = 0
, pPropBullet = Nothing
, pPropAlign = Nothing
}
newtype TeXString = TeXString {unTeXString :: String}
deriving (Eq, Show)
data ParaElem = Break
| Run RunProps String
-- It would be more elegant to have native TeXMath
-- Expressions here, but this allows us to use
-- `convertmath` from T.P.Writers.Math. Will perhaps
-- revisit in the future.
| MathElem MathType TeXString
deriving (Show, Eq)
data Strikethrough = NoStrike | SingleStrike | DoubleStrike
deriving (Show, Eq)
data Capitals = NoCapitals | SmallCapitals | AllCapitals
deriving (Show, Eq)
type URL = String
data RunProps = RunProps { rPropBold :: Bool
, rPropItalics :: Bool
, rStrikethrough :: Maybe Strikethrough
, rBaseline :: Maybe Int
, rCap :: Maybe Capitals
, rLink :: Maybe (URL, String)
, rPropCode :: Bool
, rPropBlockQuote :: Bool
, rPropForceSize :: Maybe Pixels
} deriving (Show, Eq)
instance Default RunProps where
def = RunProps { rPropBold = False
, rPropItalics = False
, rStrikethrough = Nothing
, rBaseline = Nothing
, rCap = Nothing
, rLink = Nothing
, rPropCode = False
, rPropBlockQuote = False
, rPropForceSize = Nothing
}
data PicProps = PicProps { picPropLink :: Maybe (URL, String)
} deriving (Show, Eq)
instance Default PicProps where
def = PicProps { picPropLink = Nothing
}
--------------------------------------------------
inlinesToParElems :: Monad m => [Inline] -> P m [ParaElem]
inlinesToParElems ils = concatMapM inlineToParElems ils
inlineToParElems :: Monad m => Inline -> P m [ParaElem]
inlineToParElems (Str s) = do
pr <- asks envRunProps
return [Run pr s]
inlineToParElems (Emph ils) =
local (\r -> r{envRunProps = (envRunProps r){rPropItalics=True}}) $
inlinesToParElems ils
inlineToParElems (Strong ils) =
local (\r -> r{envRunProps = (envRunProps r){rPropBold=True}}) $
inlinesToParElems ils
inlineToParElems (Strikeout ils) =
local (\r -> r{envRunProps = (envRunProps r){rStrikethrough=Just SingleStrike}}) $
inlinesToParElems ils
inlineToParElems (Superscript ils) =
local (\r -> r{envRunProps = (envRunProps r){rBaseline=Just 30000}}) $
inlinesToParElems ils
inlineToParElems (Subscript ils) =
local (\r -> r{envRunProps = (envRunProps r){rBaseline=Just (-25000)}}) $
inlinesToParElems ils
inlineToParElems (SmallCaps ils) =
local (\r -> r{envRunProps = (envRunProps r){rCap = Just SmallCapitals}}) $
inlinesToParElems ils
inlineToParElems Space = inlineToParElems (Str " ")
inlineToParElems SoftBreak = inlineToParElems (Str " ")
inlineToParElems LineBreak = return [Break]
inlineToParElems (Link _ ils (url, title)) = do
local (\r ->r{envRunProps = (envRunProps r){rLink = Just (url, title)}}) $
inlinesToParElems ils
inlineToParElems (Code _ str) = do
local (\r ->r{envRunProps = (envRunProps r){rPropCode = True}}) $
inlineToParElems $ Str str
inlineToParElems (Math mathtype str) =
return [MathElem mathtype (TeXString str)]
inlineToParElems (Note blks) = do
notes <- gets stNoteIds
let maxNoteId = case M.keys notes of
[] -> 0
lst -> maximum lst
curNoteId = maxNoteId + 1
modify $ \st -> st { stNoteIds = M.insert curNoteId blks notes }
inlineToParElems $ Superscript [Str $ show curNoteId]
inlineToParElems (Span _ ils) = concatMapM inlineToParElems ils
inlineToParElems (RawInline _ _) = return []
inlineToParElems _ = return []
isListType :: Block -> Bool
isListType (OrderedList _ _) = True
isListType (BulletList _) = True
isListType (DefinitionList _) = True
isListType _ = False
blockToParagraphs :: PandocMonad m => Block -> P m [Paragraph]
blockToParagraphs (Plain ils) = do
parElems <- inlinesToParElems ils
pProps <- asks envParaProps
return [Paragraph pProps parElems]
blockToParagraphs (Para ils) = do
parElems <- inlinesToParElems ils
pProps <- asks envParaProps
return [Paragraph pProps parElems]
blockToParagraphs (LineBlock ilsList) = do
parElems <- inlinesToParElems $ intercalate [LineBreak] ilsList
pProps <- asks envParaProps
return [Paragraph pProps parElems]
-- TODO: work out the attributes
blockToParagraphs (CodeBlock attr str) =
local (\r -> r{envParaProps = def{pPropMarginLeft = Just 100}}) $
blockToParagraphs $ Para [Code attr str]
-- We can't yet do incremental lists, but we should render a
-- (BlockQuote List) as a list to maintain compatibility with other
-- formats.
blockToParagraphs (BlockQuote (blk : blks)) | isListType blk = do
ps <- blockToParagraphs blk
ps' <- blockToParagraphs $ BlockQuote blks
return $ ps ++ ps'
blockToParagraphs (BlockQuote blks) =
local (\r -> r{ envParaProps = (envParaProps r){pPropMarginLeft = Just 100}
, envRunProps = (envRunProps r){rPropForceSize = Just blockQuoteSize}})$
concatMapM blockToParagraphs blks
-- TODO: work out the format
blockToParagraphs (RawBlock _ _) = return []
blockToParagraphs (Header n _ ils) = do
slideLevel <- asks envSlideLevel
parElems <- inlinesToParElems ils
-- For the time being we're not doing headers inside of bullets, but
-- we might change that.
let headerType = case n `compare` slideLevel of
LT -> TitleHeader
EQ -> SlideHeader
GT -> InternalHeader (n - slideLevel)
return [Paragraph def{pPropHeaderType = Just headerType} parElems]
blockToParagraphs (BulletList blksLst) = do
pProps <- asks envParaProps
let lvl = pPropLevel pProps
local (\env -> env{ envInList = True
, envParaProps = pProps{ pPropLevel = lvl + 1
, pPropBullet = Just Bullet
, pPropMarginLeft = Nothing
}}) $
concatMapM multiParBullet blksLst
blockToParagraphs (OrderedList listAttr blksLst) = do
pProps <- asks envParaProps
let lvl = pPropLevel pProps
local (\env -> env{ envInList = True
, envParaProps = pProps{ pPropLevel = lvl + 1
, pPropBullet = Just (AutoNumbering listAttr)
, pPropMarginLeft = Nothing
}}) $
concatMapM multiParBullet blksLst
blockToParagraphs (DefinitionList entries) = do
let go :: PandocMonad m => ([Inline], [[Block]]) -> P m [Paragraph]
go (ils, blksLst) = do
term <-blockToParagraphs $ Para [Strong ils]
-- For now, we'll treat each definition term as a
-- blockquote. We can extend this further later.
definition <- concatMapM (blockToParagraphs . BlockQuote) blksLst
return $ term ++ definition
concatMapM go entries
blockToParagraphs (Div (_, ("notes" : []), _) _) = return []
blockToParagraphs (Div _ blks) = concatMapM blockToParagraphs blks
blockToParagraphs blk = do
P.report $ BlockNotRendered blk
return []
-- Make sure the bullet env gets turned off after the first para.
multiParBullet :: PandocMonad m => [Block] -> P m [Paragraph]
multiParBullet [] = return []
multiParBullet (b:bs) = do
pProps <- asks envParaProps
p <- blockToParagraphs b
ps <- local (\env -> env{envParaProps = pProps{pPropBullet = Nothing}}) $
concatMapM blockToParagraphs bs
return $ p ++ ps
cellToParagraphs :: PandocMonad m => Alignment -> TableCell -> P m [Paragraph]
cellToParagraphs algn tblCell = do
paras <- mapM (blockToParagraphs) tblCell
let alignment = case algn of
AlignLeft -> Just AlgnLeft
AlignRight -> Just AlgnRight
AlignCenter -> Just AlgnCenter
AlignDefault -> Nothing
paras' = map (map (\p -> p{paraProps = (paraProps p){pPropAlign = alignment}})) paras
return $ concat paras'
rowToParagraphs :: PandocMonad m => [Alignment] -> [TableCell] -> P m [[Paragraph]]
rowToParagraphs algns tblCells = do
-- We have to make sure we have the right number of alignments
let pairs = zip (algns ++ repeat AlignDefault) tblCells
mapM (\(a, tc) -> cellToParagraphs a tc) pairs
blockToShape :: PandocMonad m => Block -> P m Shape
blockToShape (Plain (il:_)) | Image attr ils (url, _) <- il =
Pic def url attr <$> (inlinesToParElems ils)
blockToShape (Para (il:_)) | Image attr ils (url, _) <- il =
Pic def url attr <$> (inlinesToParElems ils)
blockToShape (Plain (il:_)) | Link _ (il':_) target <- il
, Image attr ils (url, _) <- il' =
Pic def{picPropLink = Just target} url attr <$> (inlinesToParElems ils)
blockToShape (Para (il:_)) | Link _ (il':_) target <- il
, Image attr ils (url, _) <- il' =
Pic def{picPropLink = Just target} url attr <$> (inlinesToParElems ils)
blockToShape (Table caption algn _ hdrCells rows) = do
caption' <- inlinesToParElems caption
pageWidth <- presSizeWidth <$> asks envPresentationSize
hdrCells' <- rowToParagraphs algn hdrCells
rows' <- mapM (rowToParagraphs algn) rows
let tblPr = if null hdrCells
then TableProps { tblPrFirstRow = False
, tblPrBandRow = True
}
else TableProps { tblPrFirstRow = True
, tblPrBandRow = True
}
colWidths = if null hdrCells
then case rows of
r : _ | not (null r) -> replicate (length r) $
(pageWidth - (2 * hardcodedTableMargin))`div` (toInteger $ length r)
-- satisfy the compiler. This is the same as
-- saying that rows is empty, but the compiler
-- won't understand that `[]` exhausts the
-- alternatives.
_ -> []
else replicate (length hdrCells) $
(pageWidth - (2 * hardcodedTableMargin)) `div` (toInteger $ length hdrCells)
return $ GraphicFrame [Tbl tblPr colWidths hdrCells' rows'] caption'
blockToShape blk = TextBox <$> blockToParagraphs blk
blocksToShapes :: PandocMonad m => [Block] -> P m [Shape]
blocksToShapes blks = combineShapes <$> mapM blockToShape blks
isImage :: Inline -> Bool
isImage (Image _ _ _) = True
isImage (Link _ ((Image _ _ _) : _) _) = True
isImage _ = False
splitBlocks' :: Monad m => [Block] -> [[Block]] -> [Block] -> P m [[Block]]
splitBlocks' cur acc [] = return $ acc ++ (if null cur then [] else [cur])
splitBlocks' cur acc (HorizontalRule : blks) =
splitBlocks' [] (acc ++ (if null cur then [] else [cur])) blks
splitBlocks' cur acc (h@(Header n _ _) : blks) = do
slideLevel <- asks envSlideLevel
case compare n slideLevel of
LT -> splitBlocks' [] (acc ++ (if null cur then [] else [cur]) ++ [[h]]) blks
EQ -> splitBlocks' [h] (acc ++ (if null cur then [] else [cur])) blks
GT -> splitBlocks' (cur ++ [h]) acc blks
-- `blockToParagraphs` treats Plain and Para the same, so we can save
-- some code duplication by treating them the same here.
splitBlocks' cur acc ((Plain ils) : blks) = splitBlocks' cur acc ((Para ils) : blks)
splitBlocks' cur acc ((Para (il:ils)) : blks) | isImage il = do
slideLevel <- asks envSlideLevel
case cur of
(Header n _ _) : [] | n == slideLevel ->
splitBlocks' []
(acc ++ [cur ++ [Para [il]]])
(if null ils then blks else (Para ils) : blks)
_ -> splitBlocks' []
(acc ++ (if null cur then [] else [cur]) ++ [[Para [il]]])
(if null ils then blks else (Para ils) : blks)
splitBlocks' cur acc (tbl@(Table _ _ _ _ _) : blks) = do
slideLevel <- asks envSlideLevel
case cur of
(Header n _ _) : [] | n == slideLevel ->
splitBlocks' [] (acc ++ [cur ++ [tbl]]) blks
_ -> splitBlocks' [] (acc ++ (if null cur then [] else [cur]) ++ [[tbl]]) blks
splitBlocks' cur acc (d@(Div (_, classes, _) _): blks) | "columns" `elem` classes = do
slideLevel <- asks envSlideLevel
case cur of
(Header n _ _) : [] | n == slideLevel ->
splitBlocks' [] (acc ++ [cur ++ [d]]) blks
_ -> splitBlocks' [] (acc ++ (if null cur then [] else [cur]) ++ [[d]]) blks
splitBlocks' cur acc (blk : blks) = splitBlocks' (cur ++ [blk]) acc blks
splitBlocks :: Monad m => [Block] -> P m [[Block]]
splitBlocks = splitBlocks' [] []
blocksToSlide' :: PandocMonad m => Int -> [Block] -> P m Slide
blocksToSlide' lvl ((Header n _ ils) : blks)
| n < lvl = do
hdr <- inlinesToParElems ils
return $ TitleSlide {titleSlideHeader = hdr}
| n == lvl = do
hdr <- inlinesToParElems ils
-- Now get the slide without the header, and then add the header
-- in.
slide <- blocksToSlide' lvl blks
return $ case slide of
ContentSlide _ cont -> ContentSlide hdr cont
TwoColumnSlide _ contL contR -> TwoColumnSlide hdr contL contR
slide' -> slide'
blocksToSlide' _ (blk : blks)
| Div (_, classes, _) divBlks <- blk
, "columns" `elem` classes
, (Div (_, clsL, _) blksL) : (Div (_, clsR, _) blksR) : remaining <- divBlks
, "column" `elem` clsL, "column" `elem` clsR = do
unless (null blks)
(mapM (P.report . BlockNotRendered) blks >> return ())
unless (null remaining)
(mapM (P.report . BlockNotRendered) remaining >> return ())
shapesL <- blocksToShapes blksL
shapesR <- blocksToShapes blksR
return $ TwoColumnSlide { twoColumnSlideHeader = []
, twoColumnSlideLeft = shapesL
, twoColumnSlideRight = shapesR
}
blocksToSlide' _ (blk : blks) = do
inNoteSlide <- asks envInNoteSlide
shapes <- if inNoteSlide
then forceFontSize noteSize $ blocksToShapes (blk : blks)
else blocksToShapes (blk : blks)
return $ ContentSlide { contentSlideHeader = []
, contentSlideContent = shapes
}
blocksToSlide' _ [] = return $ ContentSlide { contentSlideHeader = []
, contentSlideContent = []
}
blocksToSlide :: PandocMonad m => [Block] -> P m Slide
blocksToSlide blks = do
slideLevel <- asks envSlideLevel
blocksToSlide' slideLevel blks
makeNoteEntry :: Int -> [Block] -> [Block]
makeNoteEntry n blks =
let enum = Str (show n ++ ".")
in
case blks of
(Para ils : blks') -> (Para $ enum : Space : ils) : blks'
_ -> (Para [enum]) : blks
forceFontSize :: PandocMonad m => Pixels -> P m a -> P m a
forceFontSize px x = do
rpr <- asks envRunProps
local (\r -> r {envRunProps = rpr{rPropForceSize = Just px}}) x
-- Right now, there's no logic for making more than one slide, but I
-- want to leave the option open to make multiple slides if we figure
-- out how to guess at how much space the text of the notes will take
-- up (or if we allow a way for it to be manually controlled). Plus a
-- list will make it easier to put together in the final
-- `blocksToPresentation` function (since we can just add an empty
-- list without checking the state).
makeNotesSlides :: PandocMonad m => P m [Slide]
makeNotesSlides = local (\env -> env{envInNoteSlide=True}) $ do
noteIds <- gets stNoteIds
if M.null noteIds
then return []
else do let hdr = Header 2 nullAttr [Str "Notes"]
blks <- return $
concatMap (\(n, bs) -> makeNoteEntry n bs) $
M.toList noteIds
sld <- blocksToSlide $ hdr : blks
return [sld]
getMetaSlide :: PandocMonad m => P m (Maybe Slide)
getMetaSlide = do
meta <- asks envMetadata
title <- inlinesToParElems $ docTitle meta
subtitle <- inlinesToParElems $
case lookupMeta "subtitle" meta of
Just (MetaString s) -> [Str s]
Just (MetaInlines ils) -> ils
Just (MetaBlocks [Plain ils]) -> ils
Just (MetaBlocks [Para ils]) -> ils
_ -> []
authors <- mapM inlinesToParElems $ docAuthors meta
date <- inlinesToParElems $ docDate meta
if null title && null subtitle && null authors && null date
then return Nothing
else return $ Just $ MetadataSlide { metadataSlideTitle = title
, metadataSlideSubtitle = subtitle
, metadataSlideAuthors = authors
, metadataSlideDate = date
}
blocksToPresentation :: PandocMonad m => [Block] -> P m Presentation
blocksToPresentation blks = do
blksLst <- splitBlocks blks
slides <- mapM blocksToSlide blksLst
noteSlides <- makeNotesSlides
let slides' = slides ++ noteSlides
metadataslide <- getMetaSlide
presSize <- asks envPresentationSize
return $ case metadataslide of
Just metadataslide' -> Presentation presSize $ metadataslide' : slides'
Nothing -> Presentation presSize slides'
--------------------------------------------------------------------
copyFileToArchive :: PandocMonad m => Archive -> FilePath -> P m Archive
copyFileToArchive arch fp = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
case findEntryByPath fp refArchive `mplus` findEntryByPath fp distArchive of
Nothing -> fail $ fp ++ " missing in reference file"
Just e -> return $ addEntryToArchive e arch
getMediaFiles :: PandocMonad m => P m [FilePath]
getMediaFiles = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
let allEntries = nub $ filesInArchive refArchive ++ filesInArchive distArchive
return $ filter (isPrefixOf "ppt/media") allEntries
copyFileToArchiveIfExists :: PandocMonad m => Archive -> FilePath -> P m Archive
copyFileToArchiveIfExists arch fp = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
case findEntryByPath fp refArchive `mplus` findEntryByPath fp distArchive of
Nothing -> return $ arch
Just e -> return $ addEntryToArchive e arch
inheritedFiles :: [FilePath]
inheritedFiles = [ "_rels/.rels"
, "docProps/app.xml"
, "docProps/core.xml"
, "ppt/slideLayouts/slideLayout4.xml"
, "ppt/slideLayouts/_rels/slideLayout9.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout2.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout10.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout1.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout3.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout5.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout7.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout8.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout11.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout4.xml.rels"
, "ppt/slideLayouts/_rels/slideLayout6.xml.rels"
, "ppt/slideLayouts/slideLayout2.xml"
, "ppt/slideLayouts/slideLayout8.xml"
, "ppt/slideLayouts/slideLayout11.xml"
, "ppt/slideLayouts/slideLayout3.xml"
, "ppt/slideLayouts/slideLayout6.xml"
, "ppt/slideLayouts/slideLayout9.xml"
, "ppt/slideLayouts/slideLayout5.xml"
, "ppt/slideLayouts/slideLayout7.xml"
, "ppt/slideLayouts/slideLayout1.xml"
, "ppt/slideLayouts/slideLayout10.xml"
-- , "ppt/_rels/presentation.xml.rels"
, "ppt/theme/theme1.xml"
, "ppt/presProps.xml"
-- , "ppt/slides/_rels/slide1.xml.rels"
-- , "ppt/slides/_rels/slide2.xml.rels"
-- This is the one we're
-- going to build
-- , "ppt/slides/slide2.xml"
-- , "ppt/slides/slide1.xml"
, "ppt/viewProps.xml"
, "ppt/tableStyles.xml"
, "ppt/slideMasters/_rels/slideMaster1.xml.rels"
, "ppt/slideMasters/slideMaster1.xml"
-- , "ppt/presentation.xml"
-- , "[Content_Types].xml"
]
-- Here are some that might not be there. We won't fail if they're not
possibleInheritedFiles :: [FilePath]
possibleInheritedFiles = [ "ppt/theme/_rels/theme1.xml.rels" ]
presentationToArchive :: PandocMonad m => Presentation -> P m Archive
presentationToArchive p@(Presentation _ slides) = do
newArch <- foldM copyFileToArchive emptyArchive inheritedFiles
mediaDir <- getMediaFiles
newArch' <- foldM copyFileToArchiveIfExists newArch $
possibleInheritedFiles ++ mediaDir
-- presentation entry and rels. We have to do the rels first to make
-- sure we know the correct offset for the rIds.
presEntry <- presentationToPresEntry p
presRelsEntry <- presentationToRelsEntry p
slideEntries <- mapM (\(s, n) -> slideToEntry s n) $ zip slides [1..]
slideRelEntries <- mapM (\(s,n) -> slideToSlideRelEntry s n) $ zip slides [1..]
-- These have to come after everything, because they need the info
-- built up in the state.
mediaEntries <- makeMediaEntries
contentTypesEntry <- presentationToContentTypes p >>= contentTypesToEntry
-- fold everything into our inherited archive and return it.
return $ foldr addEntryToArchive newArch' $
slideEntries ++
slideRelEntries ++
mediaEntries ++
[contentTypesEntry, presEntry, presRelsEntry]
--------------------------------------------------
combineShapes :: [Shape] -> [Shape]
combineShapes [] = []
combineShapes (s : []) = [s]
combineShapes (pic@(Pic _ _ _ _) : ss) = pic : combineShapes ss
combineShapes ((TextBox []) : ss) = combineShapes ss
combineShapes (s : TextBox [] : ss) = combineShapes (s : ss)
combineShapes (s@(TextBox (p:ps)) : s'@(TextBox (p':ps')) : ss)
| pPropHeaderType (paraProps p) == Just TitleHeader ||
pPropHeaderType (paraProps p) == Just SlideHeader =
TextBox [p] : (combineShapes $ TextBox ps : s' : ss)
| pPropHeaderType (paraProps p') == Just TitleHeader ||
pPropHeaderType (paraProps p') == Just SlideHeader =
s : TextBox [p'] : (combineShapes $ TextBox ps' : ss)
| otherwise = combineShapes $ TextBox ((p:ps) ++ (p':ps')) : ss
combineShapes (s:ss) = s : combineShapes ss
--------------------------------------------------
getLayout :: PandocMonad m => Slide -> P m Element
getLayout slide = do
let layoutpath = case slide of
(MetadataSlide _ _ _ _) -> "ppt/slideLayouts/slideLayout1.xml"
(TitleSlide _) -> "ppt/slideLayouts/slideLayout3.xml"
(ContentSlide _ _) -> "ppt/slideLayouts/slideLayout2.xml"
(TwoColumnSlide _ _ _) -> "ppt/slideLayouts/slideLayout4.xml"
distArchive <- asks envDistArchive
root <- case findEntryByPath layoutpath distArchive of
Just e -> case parseXMLDoc $ UTF8.toStringLazy $ fromEntry e of
Just element -> return $ element
Nothing -> throwError $
PandocSomeError $
layoutpath ++ " corrupt in reference file"
Nothing -> throwError $
PandocSomeError $
layoutpath ++ " missing in reference file"
return root
shapeHasName :: NameSpaces -> String -> Element -> Bool
shapeHasName ns name element
| Just nvSpPr <- findChild (elemName ns "p" "nvSpPr") element
, Just cNvPr <- findChild (elemName ns "p" "cNvPr") nvSpPr
, Just nm <- findAttr (QName "name" Nothing Nothing) cNvPr =
nm == name
| otherwise = False
getContentShape :: NameSpaces -> Element -> Maybe Element
getContentShape ns spTreeElem
| isElem ns "p" "spTree" spTreeElem =
filterChild (\e -> (isElem ns "p" "sp" e) && (shapeHasName ns "Content Placeholder 2" e)) spTreeElem
| otherwise = Nothing
replaceNamedChildren :: NameSpaces
-> String
-> String
-> [Element]
-> Element
-> Element
replaceNamedChildren ns prefix name newKids element =
element { elContent = concat $ fun True $ elContent element }
where
fun :: Bool -> [Content] -> [[Content]]
fun _ [] = []
fun switch ((Elem e) : conts) | isElem ns prefix name e =
if switch
then (map Elem $ newKids) : fun False conts
else fun False conts
fun switch (cont : conts) = [cont] : fun switch conts
----------------------------------------------------------------
registerLink :: PandocMonad m => (URL, String) -> P m Int
registerLink link = do
curSlideId <- gets stCurSlideId
linkReg <- gets stLinkIds
mediaReg <- gets stMediaIds
let maxLinkId = case M.lookup curSlideId linkReg of
Just mp -> case M.keys mp of
[] -> 1
ks -> maximum ks
Nothing -> 1
maxMediaId = case M.lookup curSlideId mediaReg of
Just [] -> 1
Just mInfos -> maximum $ map mInfoLocalId mInfos
Nothing -> 1
maxId = max maxLinkId maxMediaId
slideLinks = case M.lookup curSlideId linkReg of
Just mp -> M.insert (maxId + 1) link mp
Nothing -> M.singleton (maxId + 1) link
modify $ \st -> st{ stLinkIds = M.insert curSlideId slideLinks linkReg}
return $ maxId + 1
registerMedia :: PandocMonad m => FilePath -> [ParaElem] -> P m MediaInfo
registerMedia fp caption = do
curSlideId <- gets stCurSlideId
linkReg <- gets stLinkIds
mediaReg <- gets stMediaIds
globalIds <- gets stMediaGlobalIds
let maxLinkId = case M.lookup curSlideId linkReg of
Just mp -> case M.keys mp of
[] -> 1
ks -> maximum ks
Nothing -> 1
maxMediaId = case M.lookup curSlideId mediaReg of
Just [] -> 1
Just mInfos -> maximum $ map mInfoLocalId mInfos
Nothing -> 1
maxLocalId = max maxLinkId maxMediaId
maxGlobalId = case M.elems globalIds of
[] -> 0
ids -> maximum ids
(imgBytes, mbMt) <- P.fetchItem fp
let imgExt = (mbMt >>= extensionFromMimeType >>= (\x -> return $ '.':x))
<|>
case imageType imgBytes of
Just Png -> Just ".png"
Just Jpeg -> Just ".jpeg"
Just Gif -> Just ".gif"
Just Pdf -> Just ".pdf"
Just Eps -> Just ".eps"
Just Svg -> Just ".svg"
Nothing -> Nothing
let newGlobalId = case M.lookup fp globalIds of
Just ident -> ident
Nothing -> maxGlobalId + 1
let newGlobalIds = M.insert fp newGlobalId globalIds
let mediaInfo = MediaInfo { mInfoFilePath = fp
, mInfoLocalId = maxLocalId + 1
, mInfoGlobalId = newGlobalId
, mInfoMimeType = mbMt
, mInfoExt = imgExt
, mInfoCaption = (not . null) caption
}
let slideMediaInfos = case M.lookup curSlideId mediaReg of
Just minfos -> mediaInfo : minfos
Nothing -> [mediaInfo]
modify $ \st -> st{ stMediaIds = M.insert curSlideId slideMediaInfos mediaReg
, stMediaGlobalIds = newGlobalIds
}
return mediaInfo
makeMediaEntry :: PandocMonad m => MediaInfo -> P m Entry
makeMediaEntry mInfo = do
epochtime <- (floor . utcTimeToPOSIXSeconds) <$> asks envUTCTime
(imgBytes, _) <- P.fetchItem (mInfoFilePath mInfo)
let ext = case mInfoExt mInfo of
Just e -> e
Nothing -> ""
let fp = "ppt/media/image" ++ (show $ mInfoGlobalId mInfo) ++ ext
return $ toEntry fp epochtime $ BL.fromStrict imgBytes
makeMediaEntries :: PandocMonad m => P m [Entry]
makeMediaEntries = do
mediaInfos <- gets stMediaIds
let allInfos = mconcat $ M.elems mediaInfos
mapM makeMediaEntry allInfos
-- | Scales the image to fit the page
-- sizes are passed in emu
fitToPage' :: (Double, Double) -- image size in emu
-> Integer -- pageWidth
-> Integer -- pageHeight
-> (Integer, Integer) -- imagesize
fitToPage' (x, y) pageWidth pageHeight
-- Fixes width to the page width and scales the height
| x <= fromIntegral pageWidth && y <= fromIntegral pageHeight =
(floor x, floor y)
| x / fromIntegral pageWidth > y / fromIntegral pageWidth =
(pageWidth, floor $ ((fromIntegral pageWidth) / x) * y)
| otherwise =
(floor $ ((fromIntegral pageHeight) / y) * x, pageHeight)
positionImage :: (Double, Double) -> Integer -> Integer -> (Integer, Integer)
positionImage (x, y) pageWidth pageHeight =
let (x', y') = fitToPage' (x, y) pageWidth pageHeight
in
((pageWidth - x') `div` 2, (pageHeight - y') `div` 2)
getMaster :: PandocMonad m => P m Element
getMaster = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
parseXml refArchive distArchive "ppt/slideMasters/slideMaster1.xml"
-- We want to get the header dimensions, so we can make sure that the
-- image goes underneath it. We only use this in a content slide if it
-- has a header.
getHeaderSize :: PandocMonad m => P m ((Integer, Integer), (Integer, Integer))
getHeaderSize = do
master <- getMaster
let ns = elemToNameSpaces master
sps = [master] >>=
findChildren (elemName ns "p" "cSld") >>=
findChildren (elemName ns "p" "spTree") >>=
findChildren (elemName ns "p" "sp")
mbXfrm =
listToMaybe (filter (shapeHasName ns "Title Placeholder 1") sps) >>=
findChild (elemName ns "p" "spPr") >>=
findChild (elemName ns "a" "xfrm")
xoff = mbXfrm >>=
findChild (elemName ns "a" "off") >>=
findAttr (QName "x" Nothing Nothing) >>=
(listToMaybe . (\s -> reads s :: [(Integer, String)]))
yoff = mbXfrm >>=
findChild (elemName ns "a" "off") >>=
findAttr (QName "y" Nothing Nothing) >>=
(listToMaybe . (\s -> reads s :: [(Integer, String)]))
xext = mbXfrm >>=
findChild (elemName ns "a" "ext") >>=
findAttr (QName "cx" Nothing Nothing) >>=
(listToMaybe . (\s -> reads s :: [(Integer, String)]))
yext = mbXfrm >>=
findChild (elemName ns "a" "ext") >>=
findAttr (QName "cy" Nothing Nothing) >>=
(listToMaybe . (\s -> reads s :: [(Integer, String)]))
off = case xoff of
Just (xoff', _) | Just (yoff',_) <- yoff -> (xoff', yoff')
_ -> (1043490, 1027664)
ext = case xext of
Just (xext', _) | Just (yext',_) <- yext -> (xext', yext')
_ -> (7024744, 1143000)
return $ (off, ext)
-- Hard-coded for now
captionPosition :: ((Integer, Integer), (Integer, Integer))
captionPosition = ((457200, 6061972), (8229600, 527087))
createCaption :: PandocMonad m => [ParaElem] -> P m Element
createCaption paraElements = do
let para = Paragraph def{pPropAlign = Just AlgnCenter} paraElements
elements <- mapM paragraphToElement [para]
let ((x, y), (cx, cy)) = captionPosition
let txBody = mknode "p:txBody" [] $
[mknode "a:bodyPr" [] (), mknode "a:lstStyle" [] ()] ++ elements
return $
mknode "p:sp" [] [ mknode "p:nvSpPr" []
[ mknode "p:cNvPr" [("id","1"), ("name","TextBox 3")] ()
, mknode "p:cNvSpPr" [("txBox", "1")] ()
, mknode "p:nvPr" [] ()
]
, mknode "p:spPr" []
[ mknode "a:xfrm" []
[ mknode "a:off" [("x", show x), ("y", show y)] ()
, mknode "a:ext" [("cx", show cx), ("cy", show cy)] ()
]
, mknode "a:prstGeom" [("prst", "rect")]
[ mknode "a:avLst" [] ()
]
, mknode "a:noFill" [] ()
]
, txBody
]
-- Largely lifted from inlineToOpenXML' in T.P.W.Docx. Can't be easily
-- abstracted because of some different namespaces and monads. TODO.
makePicElement :: PandocMonad m
=> PicProps
-> MediaInfo
-> Text.Pandoc.Definition.Attr
-> P m Element
makePicElement picProps mInfo attr = do
opts <- asks envOpts
pageWidth <- presSizeWidth <$> asks envPresentationSize
pageHeight <- getPageHeight <$> asks envPresentationSize
hasHeader <- asks envSlideHasHeader
let hasCaption = mInfoCaption mInfo
(imgBytes, _) <- P.fetchItem (mInfoFilePath mInfo)
-- We're not using x exts
((hXoff, hYoff), (_, hYext)) <- if hasHeader
then getHeaderSize
else return ((0, 0), (0, 0))
let ((capX, capY), (_, _)) = if hasCaption
then captionPosition
else ((0,0), (0,0))
let (xpt,ypt) = desiredSizeInPoints opts attr
(either (const def) id (imageSize opts imgBytes))
-- 12700 emu = 1 pt
let (xemu,yemu) = fitToPage' (xpt * 12700, ypt * 12700)
((pageWidth * 12700) - (2 * hXoff) - (2 * capX))
((if hasCaption then capY else (pageHeight * 12700)) - (hYoff + hYext))
(xoff, yoff) = positionImage (xpt * 12700, ypt * 12700) (pageWidth * 12700) (pageHeight * 12700)
xoff' = if hasHeader then xoff + hXoff else xoff
xoff'' = if hasCaption then xoff' + capX else xoff'
yoff' = if hasHeader then hYoff + hYext else yoff
let cNvPicPr = mknode "p:cNvPicPr" [] $
mknode "a:picLocks" [("noGrp","1")
,("noChangeAspect","1")] ()
-- cNvPr will contain the link information so we do that separately,
-- and register the link if necessary.
let cNvPrAttr = [("descr", mInfoFilePath mInfo), ("id","0"),("name","Picture 1")]
cNvPr <- case picPropLink picProps of
Just link -> do idNum <- registerLink link
return $ mknode "p:cNvPr" cNvPrAttr $
mknode "a:hlinkClick" [("r:id", "rId" ++ show idNum)] ()
Nothing -> return $ mknode "p:cNvPr" cNvPrAttr ()
let nvPicPr = mknode "p:nvPicPr" []
[ cNvPr
, cNvPicPr
, mknode "p:nvPr" [] ()]
let blipFill = mknode "p:blipFill" []
[ mknode "a:blip" [("r:embed", "rId" ++ (show $ mInfoLocalId mInfo))] ()
, mknode "a:stretch" [] $
mknode "a:fillRect" [] () ]
let xfrm = mknode "a:xfrm" []
[ mknode "a:off" [("x",show xoff''), ("y",show yoff')] ()
, mknode "a:ext" [("cx",show xemu)
,("cy",show yemu)] () ]
let prstGeom = mknode "a:prstGeom" [("prst","rect")] $
mknode "a:avLst" [] ()
let ln = mknode "a:ln" [("w","9525")]
[ mknode "a:noFill" [] ()
, mknode "a:headEnd" [] ()
, mknode "a:tailEnd" [] () ]
let spPr = mknode "p:spPr" [("bwMode","auto")]
[xfrm, prstGeom, mknode "a:noFill" [] (), ln]
return $
mknode "p:pic" []
[ nvPicPr
, blipFill
, spPr ]
-- Currently hardcoded, until I figure out how to make it dynamic.
blockQuoteSize :: Pixels
blockQuoteSize = 20
noteSize :: Pixels
noteSize = 18
paraElemToElement :: PandocMonad m => ParaElem -> P m Element
paraElemToElement Break = return $ mknode "a:br" [] ()
paraElemToElement (Run rpr s) = do
let sizeAttrs = case rPropForceSize rpr of
Just n -> [("sz", (show $ n * 100))]
Nothing -> []
attrs = sizeAttrs ++
if rPropCode rpr
then []
else (if rPropBold rpr then [("b", "1")] else []) ++
(if rPropItalics rpr then [("i", "1")] else []) ++
(case rStrikethrough rpr of
Just NoStrike -> [("strike", "noStrike")]
Just SingleStrike -> [("strike", "sngStrike")]
Just DoubleStrike -> [("strike", "dblStrike")]
Nothing -> []) ++
(case rBaseline rpr of
Just n -> [("baseline", show n)]
Nothing -> []) ++
(case rCap rpr of
Just NoCapitals -> [("cap", "none")]
Just SmallCapitals -> [("cap", "small")]
Just AllCapitals -> [("cap", "all")]
Nothing -> []) ++
[]
linkProps <- case rLink rpr of
Just link -> do idNum <- registerLink link
return [mknode "a:hlinkClick"
[("r:id", "rId" ++ show idNum)]
()
]
Nothing -> return []
let propContents = if rPropCode rpr
then [mknode "a:latin" [("typeface", "Courier")] ()]
else linkProps
return $ mknode "a:r" [] [ mknode "a:rPr" attrs propContents
, mknode "a:t" [] s
]
paraElemToElement (MathElem mathType texStr) = do
res <- convertMath writeOMML mathType (unTeXString texStr)
case res of
Right r -> return $ mknode "a14:m" [] $ addMathInfo r
Left (Str s) -> paraElemToElement (Run def s)
Left _ -> throwError $ PandocShouldNeverHappenError "non-string math fallback"
-- This is a bit of a kludge -- really requires adding an option to
-- TeXMath, but since that's a different package, we'll do this one
-- step at a time.
addMathInfo :: Element -> Element
addMathInfo element =
let mathspace = Attr { attrKey = (QName "m" Nothing (Just "xmlns"))
, attrVal = "http://schemas.openxmlformats.org/officeDocument/2006/math"
}
in add_attr mathspace element
-- We look through the element to see if it contains an a14:m
-- element. If so, we surround it. This is a bit ugly, but it seems
-- more dependable than looking through shapes for math. Plus this is
-- an xml implementation detail, so it seems to make sense to do it at
-- the xml level.
surroundWithMathAlternate :: Element -> Element
surroundWithMathAlternate element =
case findElement (QName "m" Nothing (Just "a14")) element of
Just _ ->
mknode "mc:AlternateContent"
[("xmlns:mc", "http://schemas.openxmlformats.org/markup-compatibility/2006")
] [ mknode "mc:Choice"
[ ("xmlns:a14", "http://schemas.microsoft.com/office/drawing/2010/main")
, ("Requires", "a14")] [ element ]
]
Nothing -> element
paragraphToElement :: PandocMonad m => Paragraph -> P m Element
paragraphToElement par = do
let
attrs = [("lvl", show $ pPropLevel $ paraProps par)] ++
(case pPropMarginLeft (paraProps par) of
Just px -> [("marL", show $ 12700 * px), ("indent", "0")]
Nothing -> []
) ++
(case pPropAlign (paraProps par) of
Just AlgnLeft -> [("algn", "l")]
Just AlgnRight -> [("algn", "r")]
Just AlgnCenter -> [("algn", "ctr")]
Nothing -> []
)
props = [] ++
(case pPropBullet $ paraProps par of
Just Bullet -> []
Just (AutoNumbering attrs') ->
[mknode "a:buAutoNum" [("type", autoNumberingToType attrs')] ()]
Nothing -> [mknode "a:buNone" [] ()]
)
paras <- mapM paraElemToElement (combineParaElems $ paraElems par)
return $ mknode "a:p" [] $ [mknode "a:pPr" attrs props] ++ paras
shapeToElement :: PandocMonad m => Element -> Shape -> P m Element
shapeToElement layout (TextBox paras)
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld
, Just sp <- getContentShape ns spTree = do
elements <- mapM paragraphToElement paras
let txBody = mknode "p:txBody" [] $
[mknode "a:bodyPr" [] (), mknode "a:lstStyle" [] ()] ++ elements
emptySpPr = mknode "p:spPr" [] ()
return $
surroundWithMathAlternate $
replaceNamedChildren ns "p" "txBody" [txBody] $
replaceNamedChildren ns "p" "spPr" [emptySpPr] $
sp
-- XXX: TODO
| otherwise = return $ mknode "p:sp" [] ()
-- XXX: TODO
shapeToElement layout (Pic picProps fp attr alt) = do
mInfo <- registerMedia fp alt
case mInfoExt mInfo of
Just _ -> makePicElement picProps mInfo attr
Nothing -> shapeToElement layout $ TextBox [Paragraph def alt]
shapeToElement _ (GraphicFrame tbls _) = do
elements <- mapM graphicToElement tbls
return $ mknode "p:graphicFrame" [] $
[ mknode "p:nvGraphicFramePr" [] $
[ mknode "p:cNvPr" [("id", "6"), ("name", "Content Placeholder 5")] ()
, mknode "p:cNvGraphicFramePr" [] $
[mknode "a:graphicFrameLocks" [("noGrp", "1")] ()]
, mknode "p:nvPr" [] $
[mknode "p:ph" [("idx", "1")] ()]
]
, mknode "p:xfrm" [] $
[ mknode "a:off" [("x", "457200"), ("y", "1600200")] ()
, mknode "a:ext" [("cx", "8029388"), ("cy", "3644152")] ()
]
] ++ elements
shapeToElements :: PandocMonad m => Element -> Shape -> P m [Element]
shapeToElements layout shp = do
case shp of
(Pic _ _ _ alt) | (not . null) alt -> do
element <- shapeToElement layout shp
caption <- createCaption alt
return [element, caption]
(GraphicFrame _ cptn) | (not . null) cptn -> do
element <- shapeToElement layout shp
caption <- createCaption cptn
return [element, caption]
_ -> do
element <- shapeToElement layout shp
return [element]
shapesToElements :: PandocMonad m => Element -> [Shape] -> P m [Element]
shapesToElements layout shps = do
concat <$> mapM (shapeToElements layout) shps
hardcodedTableMargin :: Integer
hardcodedTableMargin = 36
graphicToElement :: PandocMonad m => Graphic -> P m Element
graphicToElement (Tbl tblPr colWidths hdrCells rows) = do
let cellToOpenXML paras =
do elements <- mapM paragraphToElement paras
let elements' = if null elements
then [mknode "a:p" [] [mknode "a:endParaRPr" [] ()]]
else elements
return $
[mknode "a:txBody" [] $
([ mknode "a:bodyPr" [] ()
, mknode "a:lstStyle" [] ()]
++ elements')]
headers' <- mapM cellToOpenXML hdrCells
rows' <- mapM (mapM cellToOpenXML) rows
let borderProps = mknode "a:tcPr" [] ()
let emptyCell = [mknode "a:p" [] [mknode "a:pPr" [] ()]]
let mkcell border contents = mknode "a:tc" []
$ (if null contents
then emptyCell
else contents) ++ [ borderProps | border ]
let mkrow border cells = mknode "a:tr" [("h", "0")] $ map (mkcell border) cells
let mkgridcol w = mknode "a:gridCol"
[("w", show ((12700 * w) :: Integer))] ()
let hasHeader = not (all null hdrCells)
return $ mknode "a:graphic" [] $
[mknode "a:graphicData" [("uri", "http://schemas.openxmlformats.org/drawingml/2006/table")] $
[mknode "a:tbl" [] $
[ mknode "a:tblPr" [ ("firstRow", if tblPrFirstRow tblPr then "1" else "0")
, ("bandRow", if tblPrBandRow tblPr then "1" else "0")
] ()
, mknode "a:tblGrid" [] (if all (==0) colWidths
then []
else map mkgridcol colWidths)
]
++ [ mkrow True headers' | hasHeader ] ++ map (mkrow False) rows'
]
]
getShapeByName :: NameSpaces -> Element -> String -> Maybe Element
getShapeByName ns spTreeElem name
| isElem ns "p" "spTree" spTreeElem =
filterChild (\e -> (isElem ns "p" "sp" e) && (shapeHasName ns name e)) spTreeElem
| otherwise = Nothing
nonBodyTextToElement :: PandocMonad m => Element -> String -> [ParaElem] -> P m Element
nonBodyTextToElement layout shapeName paraElements
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld
, Just sp <- getShapeByName ns spTree shapeName = do
let hdrPara = Paragraph def paraElements
element <- paragraphToElement hdrPara
let txBody = mknode "p:txBody" [] $
[mknode "a:bodyPr" [] (), mknode "a:lstStyle" [] ()] ++
[element]
return $ replaceNamedChildren ns "p" "txBody" [txBody] sp
-- XXX: TODO
| otherwise = return $ mknode "p:sp" [] ()
contentToElement :: PandocMonad m => Element -> [ParaElem] -> [Shape] -> P m Element
contentToElement layout hdrShape shapes
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld = do
element <- nonBodyTextToElement layout "Title 1" hdrShape
let hdrShapeElements = if null hdrShape
then []
else [element]
contentElements <- shapesToElements layout shapes
return $
replaceNamedChildren ns "p" "sp"
(hdrShapeElements ++ contentElements)
spTree
contentToElement _ _ _ = return $ mknode "p:sp" [] ()
setIdx'' :: NameSpaces -> String -> Content -> Content
setIdx'' _ idx (Elem element) =
let tag = XMLC.getTag element
attrs = XMLC.tagAttribs tag
idxKey = (QName "idx" Nothing Nothing)
attrs' = Attr idxKey idx : (filter (\a -> attrKey a /= idxKey) attrs)
tag' = tag {XMLC.tagAttribs = attrs'}
in Elem $ XMLC.setTag tag' element
setIdx'' _ _ c = c
setIdx' :: NameSpaces -> String -> XMLC.Cursor -> XMLC.Cursor
setIdx' ns idx cur =
let modifiedCur = XMLC.modifyContent (setIdx'' ns idx) cur
in
case XMLC.nextDF modifiedCur of
Just cur' -> setIdx' ns idx cur'
Nothing -> XMLC.root modifiedCur
setIdx :: NameSpaces -> String -> Element -> Element
setIdx ns idx element =
let cur = XMLC.fromContent (Elem element)
cur' = setIdx' ns idx cur
in
case XMLC.toTree cur' of
Elem element' -> element'
_ -> element
twoColumnToElement :: PandocMonad m => Element -> [ParaElem] -> [Shape] -> [Shape] -> P m Element
twoColumnToElement layout hdrShape shapesL shapesR
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld = do
element <- nonBodyTextToElement layout "Title 1" hdrShape
let hdrShapeElements = if null hdrShape
then []
else [element]
contentElementsL <- shapesToElements layout shapesL
contentElementsR <- shapesToElements layout shapesR
let contentElementsL' = map (setIdx ns "1") contentElementsL
contentElementsR' = map (setIdx ns "2") contentElementsR
return $
replaceNamedChildren ns "p" "sp"
(hdrShapeElements ++ contentElementsL' ++ contentElementsR')
spTree
twoColumnToElement _ _ _ _= return $ mknode "p:sp" [] ()
titleToElement :: PandocMonad m => Element -> [ParaElem] -> P m Element
titleToElement layout titleElems
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld = do
element <- nonBodyTextToElement layout "Title 1" titleElems
let titleShapeElements = if null titleElems
then []
else [element]
return $ replaceNamedChildren ns "p" "sp" titleShapeElements spTree
titleToElement _ _ = return $ mknode "p:sp" [] ()
metadataToElement :: PandocMonad m => Element -> [ParaElem] -> [ParaElem] -> [[ParaElem]] -> [ParaElem] -> P m Element
metadataToElement layout titleElems subtitleElems authorsElems dateElems
| ns <- elemToNameSpaces layout
, Just cSld <- findChild (elemName ns "p" "cSld") layout
, Just spTree <- findChild (elemName ns "p" "spTree") cSld = do
titleShapeElements <- if null titleElems
then return []
else sequence [nonBodyTextToElement layout "Title 1" titleElems]
let combinedAuthorElems = intercalate [Break] authorsElems
subtitleAndAuthorElems = intercalate [Break, Break] [subtitleElems, combinedAuthorElems]
subtitleShapeElements <- if null subtitleAndAuthorElems
then return []
else sequence [nonBodyTextToElement layout "Subtitle 2" subtitleAndAuthorElems]
dateShapeElements <- if null dateElems
then return []
else sequence [nonBodyTextToElement layout "Date Placeholder 3" dateElems]
return $ replaceNamedChildren ns "p" "sp"
(titleShapeElements ++ subtitleShapeElements ++ dateShapeElements)
spTree
metadataToElement _ _ _ _ _ = return $ mknode "p:sp" [] ()
slideToElement :: PandocMonad m => Slide -> P m Element
slideToElement s@(ContentSlide hdrElems shapes) = do
layout <- getLayout s
spTree <- local (\env -> if null hdrElems
then env
else env{envSlideHasHeader=True}) $
contentToElement layout hdrElems shapes
return $ mknode "p:sld"
[ ("xmlns:a", "http://schemas.openxmlformats.org/drawingml/2006/main"),
("xmlns:r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships"),
("xmlns:p", "http://schemas.openxmlformats.org/presentationml/2006/main")
] [mknode "p:cSld" [] [spTree]]
slideToElement s@(TwoColumnSlide hdrElems shapesL shapesR) = do
layout <- getLayout s
spTree <- local (\env -> if null hdrElems
then env
else env{envSlideHasHeader=True}) $
twoColumnToElement layout hdrElems shapesL shapesR
return $ mknode "p:sld"
[ ("xmlns:a", "http://schemas.openxmlformats.org/drawingml/2006/main"),
("xmlns:r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships"),
("xmlns:p", "http://schemas.openxmlformats.org/presentationml/2006/main")
] [mknode "p:cSld" [] [spTree]]
slideToElement s@(TitleSlide hdrElems) = do
layout <- getLayout s
spTree <- titleToElement layout hdrElems
return $ mknode "p:sld"
[ ("xmlns:a", "http://schemas.openxmlformats.org/drawingml/2006/main"),
("xmlns:r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships"),
("xmlns:p", "http://schemas.openxmlformats.org/presentationml/2006/main")
] [mknode "p:cSld" [] [spTree]]
slideToElement s@(MetadataSlide titleElems subtitleElems authorElems dateElems) = do
layout <- getLayout s
spTree <- metadataToElement layout titleElems subtitleElems authorElems dateElems
return $ mknode "p:sld"
[ ("xmlns:a", "http://schemas.openxmlformats.org/drawingml/2006/main"),
("xmlns:r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships"),
("xmlns:p", "http://schemas.openxmlformats.org/presentationml/2006/main")
] [mknode "p:cSld" [] [spTree]]
-----------------------------------------------------------------------
slideToFilePath :: Slide -> Int -> FilePath
slideToFilePath _ idNum = "slide" ++ (show $ idNum) ++ ".xml"
slideToSlideId :: Monad m => Slide -> Int -> P m String
slideToSlideId _ idNum = do
n <- gets stSlideIdOffset
return $ "rId" ++ (show $ idNum + n)
data Relationship = Relationship { relId :: Int
, relType :: MimeType
, relTarget :: FilePath
} deriving (Show, Eq)
elementToRel :: Element -> Maybe Relationship
elementToRel element
| elName element == QName "Relationship" (Just "http://schemas.openxmlformats.org/package/2006/relationships") Nothing =
do rId <- findAttr (QName "Id" Nothing Nothing) element
numStr <- stripPrefix "rId" rId
num <- case reads numStr :: [(Int, String)] of
(n, _) : _ -> Just n
[] -> Nothing
type' <- findAttr (QName "Type" Nothing Nothing) element
target <- findAttr (QName "Target" Nothing Nothing) element
return $ Relationship num type' target
| otherwise = Nothing
slideToPresRel :: Monad m => Slide -> Int -> P m Relationship
slideToPresRel slide idNum = do
n <- gets stSlideIdOffset
let rId = idNum + n
fp = "slides/" ++ slideToFilePath slide idNum
return $ Relationship { relId = rId
, relType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"
, relTarget = fp
}
getRels :: PandocMonad m => P m [Relationship]
getRels = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
relsElem <- parseXml refArchive distArchive "ppt/_rels/presentation.xml.rels"
let globalNS = "http://schemas.openxmlformats.org/package/2006/relationships"
let relElems = findChildren (QName "Relationship" (Just globalNS) Nothing) relsElem
return $ mapMaybe elementToRel relElems
presentationToRels :: PandocMonad m => Presentation -> P m [Relationship]
presentationToRels (Presentation _ slides) = do
mySlideRels <- mapM (\(s, n) -> slideToPresRel s n) $ zip slides [1..]
rels <- getRels
let relsWithoutSlides = filter (\r -> relType r /= "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide") rels
-- We want to make room for the slides in the id space. The slides
-- will start at Id2 (since Id1 is for the slide master). There are
-- two slides in the data file, but that might change in the future,
-- so we will do this:
--
-- 1. We look to see what the minimum relWithoutSlide id (greater than 1) is.
-- 2. We add the difference between this and the number of slides to
-- all relWithoutSlide rels (unless they're 1)
let minRelNotOne = case filter (1<) $ map relId relsWithoutSlides of
[] -> 0 -- doesn't matter in this case, since
-- there will be nothing to map the
-- function over
l -> minimum l
modifyRelNum :: Int -> Int
modifyRelNum 1 = 1
modifyRelNum n = n - minRelNotOne + 2 + length slides
relsWithoutSlides' = map (\r -> r{relId = modifyRelNum $ relId r}) relsWithoutSlides
return $ mySlideRels ++ relsWithoutSlides'
relToElement :: Relationship -> Element
relToElement rel = mknode "Relationship" [ ("Id", "rId" ++ (show $ relId rel))
, ("Type", relType rel)
, ("Target", relTarget rel) ] ()
relsToElement :: [Relationship] -> Element
relsToElement rels = mknode "Relationships"
[("xmlns", "http://schemas.openxmlformats.org/package/2006/relationships")]
(map relToElement rels)
presentationToRelsEntry :: PandocMonad m => Presentation -> P m Entry
presentationToRelsEntry pres = do
rels <- presentationToRels pres
elemToEntry "ppt/_rels/presentation.xml.rels" $ relsToElement rels
elemToEntry :: PandocMonad m => FilePath -> Element -> P m Entry
elemToEntry fp element = do
epochtime <- (floor . utcTimeToPOSIXSeconds) <$> asks envUTCTime
return $ toEntry fp epochtime $ renderXml element
slideToEntry :: PandocMonad m => Slide -> Int -> P m Entry
slideToEntry slide idNum = do
modify $ \st -> st{stCurSlideId = idNum}
element <- slideToElement slide
elemToEntry ("ppt/slides/" ++ slideToFilePath slide idNum) element
slideToSlideRelEntry :: PandocMonad m => Slide -> Int -> P m Entry
slideToSlideRelEntry slide idNum = do
element <- slideToSlideRelElement slide idNum
elemToEntry ("ppt/slides/_rels/" ++ slideToFilePath slide idNum ++ ".rels") element
linkRelElement :: Int -> (URL, String) -> Element
linkRelElement idNum (url, _) =
mknode "Relationship" [ ("Id", "rId" ++ show idNum)
, ("Type", "http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink")
, ("Target", url)
, ("TargetMode", "External")
] ()
linkRelElements :: M.Map Int (URL, String) -> [Element]
linkRelElements mp = map (\(n, lnk) -> linkRelElement n lnk) (M.toList mp)
mediaRelElement :: MediaInfo -> Element
mediaRelElement mInfo =
let ext = case mInfoExt mInfo of
Just e -> e
Nothing -> ""
in
mknode "Relationship" [ ("Id", "rId" ++ (show $ mInfoLocalId mInfo))
, ("Type", "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image")
, ("Target", "../media/image" ++ (show $ mInfoGlobalId mInfo) ++ ext)
] ()
slideToSlideRelElement :: PandocMonad m => Slide -> Int -> P m Element
slideToSlideRelElement slide idNum = do
let target = case slide of
(MetadataSlide _ _ _ _) -> "../slideLayouts/slideLayout1.xml"
(TitleSlide _) -> "../slideLayouts/slideLayout3.xml"
(ContentSlide _ _) -> "../slideLayouts/slideLayout2.xml"
(TwoColumnSlide _ _ _) -> "../slideLayouts/slideLayout4.xml"
linkIds <- gets stLinkIds
mediaIds <- gets stMediaIds
let linkRels = case M.lookup idNum linkIds of
Just mp -> linkRelElements mp
Nothing -> []
mediaRels = case M.lookup idNum mediaIds of
Just mInfos -> map mediaRelElement mInfos
Nothing -> []
return $
mknode "Relationships"
[("xmlns", "http://schemas.openxmlformats.org/package/2006/relationships")]
([mknode "Relationship" [ ("Id", "rId1")
, ("Type", "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout")
, ("Target", target)] ()
] ++ linkRels ++ mediaRels)
slideToSldIdElement :: PandocMonad m => Slide -> Int -> P m Element
slideToSldIdElement slide idNum = do
let id' = show $ idNum + 255
rId <- slideToSlideId slide idNum
return $ mknode "p:sldId" [("id", id'), ("r:id", rId)] ()
presentationToSldIdLst :: PandocMonad m => Presentation -> P m Element
presentationToSldIdLst (Presentation _ slides) = do
ids <- mapM (\(s,n) -> slideToSldIdElement s n) (zip slides [1..])
return $ mknode "p:sldIdLst" [] ids
presentationToPresentationElement :: PandocMonad m => Presentation -> P m Element
presentationToPresentationElement pres = do
refArchive <- asks envRefArchive
distArchive <- asks envDistArchive
element <- parseXml refArchive distArchive "ppt/presentation.xml"
sldIdLst <- presentationToSldIdLst pres
let modifySldIdLst :: Content -> Content
modifySldIdLst (Elem e) = case elName e of
(QName "sldIdLst" _ _) -> Elem sldIdLst
_ -> Elem e
modifySldIdLst ct = ct
newContent = map modifySldIdLst $ elContent element
return $ element{elContent = newContent}
presentationToPresEntry :: PandocMonad m => Presentation -> P m Entry
presentationToPresEntry pres = presentationToPresentationElement pres >>=
elemToEntry "ppt/presentation.xml"
defaultContentTypeToElem :: DefaultContentType -> Element
defaultContentTypeToElem dct =
mknode "Default"
[("Extension", defContentTypesExt dct),
("ContentType", defContentTypesType dct)]
()
overrideContentTypeToElem :: OverrideContentType -> Element
overrideContentTypeToElem oct =
mknode "Override"
[("PartName", overrideContentTypesPart oct),
("ContentType", overrideContentTypesType oct)]
()
contentTypesToElement :: ContentTypes -> Element
contentTypesToElement ct =
let ns = "http://schemas.openxmlformats.org/package/2006/content-types"
in
mknode "Types" [("xmlns", ns)] $
(map defaultContentTypeToElem $ contentTypesDefaults ct) ++
(map overrideContentTypeToElem $ contentTypesOverrides ct)
data DefaultContentType = DefaultContentType
{ defContentTypesExt :: String
, defContentTypesType:: MimeType
}
deriving (Show, Eq)
data OverrideContentType = OverrideContentType
{ overrideContentTypesPart :: FilePath
, overrideContentTypesType :: MimeType
}
deriving (Show, Eq)
data ContentTypes = ContentTypes { contentTypesDefaults :: [DefaultContentType]
, contentTypesOverrides :: [OverrideContentType]
}
deriving (Show, Eq)
contentTypesToEntry :: PandocMonad m => ContentTypes -> P m Entry
contentTypesToEntry ct = elemToEntry "[Content_Types].xml" $ contentTypesToElement ct
pathToOverride :: FilePath -> Maybe OverrideContentType
pathToOverride fp = OverrideContentType ("/" ++ fp) <$> (getContentType fp)
mediaContentType :: MediaInfo -> Maybe DefaultContentType
mediaContentType mInfo
| Just ('.' : ext) <- mInfoExt mInfo =
Just $ DefaultContentType { defContentTypesExt = ext
, defContentTypesType =
case mInfoMimeType mInfo of
Just mt -> mt
Nothing -> "application/octet-stream"
}
| otherwise = Nothing
presentationToContentTypes :: PandocMonad m => Presentation -> P m ContentTypes
presentationToContentTypes (Presentation _ slides) = do
mediaInfos <- (mconcat . M.elems) <$> gets stMediaIds
let defaults = [ DefaultContentType "xml" "application/xml"
, DefaultContentType "rels" "application/vnd.openxmlformats-package.relationships+xml"
]
mediaDefaults = nub $ mapMaybe mediaContentType mediaInfos
inheritedOverrides = mapMaybe pathToOverride inheritedFiles
presOverride = mapMaybe pathToOverride ["ppt/presentation.xml"]
slideOverrides =
mapMaybe
(\(s, n) ->
pathToOverride $ "ppt/slides/" ++ slideToFilePath s n)
(zip slides [1..])
-- propOverride = mapMaybe pathToOverride ["docProps/core.xml"]
return $ ContentTypes
(defaults ++ mediaDefaults)
(inheritedOverrides ++ presOverride ++ slideOverrides)
presML :: String
presML = "application/vnd.openxmlformats-officedocument.presentationml"
noPresML :: String
noPresML = "application/vnd.openxmlformats-officedocument"
getContentType :: FilePath -> Maybe MimeType
getContentType fp
| fp == "ppt/presentation.xml" = Just $ presML ++ ".presentation.main+xml"
| fp == "ppt/presProps.xml" = Just $ presML ++ ".presProps+xml"
| fp == "ppt/viewProps.xml" = Just $ presML ++ ".viewProps+xml"
| fp == "ppt/tableStyles.xml" = Just $ presML ++ ".tableStyles+xml"
| fp == "docProps/core.xml" = Just $ "application/vnd.openxmlformats-package.core-properties+xml"
| fp == "docProps/app.xml" = Just $ noPresML ++ ".extended-properties+xml"
| "ppt" : "slideMasters" : f : [] <- splitDirectories fp
, (_, ".xml") <- splitExtension f =
Just $ presML ++ ".slideMaster+xml"
| "ppt" : "slides" : f : [] <- splitDirectories fp
, (_, ".xml") <- splitExtension f =
Just $ presML ++ ".slide+xml"
| "ppt" : "notesMasters" : f : [] <- splitDirectories fp
, (_, ".xml") <- splitExtension f =
Just $ presML ++ ".notesMaster+xml"
| "ppt" : "notesSlides" : f : [] <- splitDirectories fp
, (_, ".xml") <- splitExtension f =
Just $ presML ++ ".notesSlide+xml"
| "ppt" : "theme" : f : [] <- splitDirectories fp
, (_, ".xml") <- splitExtension f =
Just $ noPresML ++ ".theme+xml"
| "ppt" : "slideLayouts" : _ : [] <- splitDirectories fp=
Just $ presML ++ ".slideLayout+xml"
| otherwise = Nothing
-------------------------------------------------------
combineParaElems' :: Maybe ParaElem -> [ParaElem] -> [ParaElem]
combineParaElems' mbPElem [] = maybeToList mbPElem
combineParaElems' Nothing (pElem : pElems) =
combineParaElems' (Just pElem) pElems
combineParaElems' (Just pElem') (pElem : pElems)
| Run rPr' s' <- pElem'
, Run rPr s <- pElem
, rPr == rPr' =
combineParaElems' (Just $ Run rPr' $ s' ++ s) pElems
| otherwise =
pElem' : combineParaElems' (Just pElem) pElems
combineParaElems :: [ParaElem] -> [ParaElem]
combineParaElems = combineParaElems' Nothing
|