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|
{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.Writers.OOXML
Copyright : Copyright (C) 2012-2021 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Functions common to OOXML writers (Docx and Powerpoint)
-}
module Text.Pandoc.Writers.OOXML ( mknode
, mktnode
, nodename
, toLazy
, renderXml
, parseXml
, elemToNameSpaces
, elemName
, isElem
, NameSpaces
, fitToPage
) where
import Codec.Archive.Zip
import Control.Monad.Reader
import Control.Monad.Except (throwError)
import Text.Pandoc.Error
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import qualified Data.ByteString.Lazy.Char8 as BL8
import Data.Maybe (mapMaybe)
import qualified Data.Text as T
import Text.Pandoc.Class.PandocMonad (PandocMonad)
import qualified Text.Pandoc.UTF8 as UTF8
import Text.XML.Light as XML
import Text.Pandoc.XMLParser (parseXMLElement)
mknode :: Node t => String -> [(String,String)] -> t -> Element
mknode s attrs =
add_attrs (map (\(k,v) -> Attr (nodename k) v) attrs) . node (nodename s)
mktnode :: String -> [(String,String)] -> T.Text -> Element
mktnode s attrs = mknode s attrs . T.unpack
nodename :: String -> QName
nodename s = QName{ qName = name, qURI = Nothing, qPrefix = prefix }
where (name, prefix) = case break (==':') s of
(xs,[]) -> (xs, Nothing)
(ys, _:zs) -> (zs, Just ys)
toLazy :: B.ByteString -> BL.ByteString
toLazy = BL.fromChunks . (:[])
renderXml :: Element -> BL.ByteString
renderXml elt = BL8.pack "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" <>
UTF8.fromStringLazy (showElement elt)
parseXml :: PandocMonad m => Archive -> Archive -> String -> m Element
parseXml refArchive distArchive relpath =
case findEntryByPath relpath refArchive `mplus`
findEntryByPath relpath distArchive of
Nothing -> throwError $ PandocSomeError $
T.pack relpath <> " missing in reference file"
Just e -> case parseXMLElement . UTF8.toTextLazy . fromEntry $ e of
Left msg ->
throwError $ PandocXMLError (T.pack relpath) msg
Right d -> return d
-- Copied from Util
attrToNSPair :: XML.Attr -> Maybe (String, String)
attrToNSPair (XML.Attr (QName s _ (Just "xmlns")) val) = Just (s, val)
attrToNSPair _ = Nothing
elemToNameSpaces :: Element -> NameSpaces
elemToNameSpaces = mapMaybe attrToNSPair . elAttribs
elemName :: NameSpaces -> String -> String -> QName
elemName ns prefix name =
QName name (lookup prefix ns) (if null prefix then Nothing else Just prefix)
isElem :: NameSpaces -> String -> String -> Element -> Bool
isElem ns prefix name element =
let ns' = ns ++ elemToNameSpaces element
in qName (elName element) == name &&
qURI (elName element) == lookup prefix ns'
type NameSpaces = [(String, String)]
-- | Scales the image to fit the page
-- sizes are passed in emu
fitToPage :: (Double, Double) -> Integer -> (Integer, Integer)
fitToPage (x, y) pageWidth
-- Fixes width to the page width and scales the height
| x > fromIntegral pageWidth =
(pageWidth, floor $ (fromIntegral pageWidth / x) * y)
| otherwise = (floor x, floor y)
|
