From d7a4996b1e7e201095ce792375a0776984fa8fcd Mon Sep 17 00:00:00 2001 From: John MacFarlane Date: Tue, 16 Feb 2021 18:40:06 -0800 Subject: Split up T.P.XML.Light into submodules. --- src/Text/Pandoc/XML/Light/Types.hs | 190 +++++++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 src/Text/Pandoc/XML/Light/Types.hs (limited to 'src/Text/Pandoc/XML/Light/Types.hs') diff --git a/src/Text/Pandoc/XML/Light/Types.hs b/src/Text/Pandoc/XML/Light/Types.hs new file mode 100644 index 000000000..f338da6ea --- /dev/null +++ b/src/Text/Pandoc/XML/Light/Types.hs @@ -0,0 +1,190 @@ +{-# LANGUAGE FlexibleInstances #-} +{-# LANGUAGE DeriveDataTypeable #-} +{- | + Module : Text.Pandoc.XML.Light.Types + Copyright : Copyright (C) 2021 John MacFarlane + License : GNU GPL, version 2 or above + + Maintainer : John MacFarlane + Stability : alpha + Portability : portable + +-} +module Text.Pandoc.XML.Light.Types + ( -- * Basic types, duplicating those from xml-light but with Text + -- instead of String + Line + , Content(..) + , Element(..) + , Attr(..) + , CData(..) + , CDataKind(..) + , QName(..) + , Node(..) + , unode + , unqual + , add_attr + , add_attrs + -- * Conversion functions from xml-light types + , fromXLQName + , fromXLCData + , fromXLElement + , fromXLAttr + , fromXLContent + ) where + +import Data.Text (Text) +import qualified Data.Text as T +import Data.Data (Data) +import Data.Typeable (Typeable) +import qualified Text.XML.Light as XL + +-- +-- type definitions lightly modified from xml-light +-- + +-- | A line is an Integer +type Line = Integer + +-- | XML content +data Content = Elem Element + | Text CData + | CRef Text + deriving (Show, Typeable, Data) + +-- | XML elements +data Element = Element { + elName :: QName, + elAttribs :: [Attr], + elContent :: [Content], + elLine :: Maybe Line + } deriving (Show, Typeable, Data) + +-- | XML attributes +data Attr = Attr { + attrKey :: QName, + attrVal :: Text + } deriving (Eq, Ord, Show, Typeable, Data) + +-- | XML CData +data CData = CData { + cdVerbatim :: CDataKind, + cdData :: Text, + cdLine :: Maybe Line + } deriving (Show, Typeable, Data) + +data CDataKind + = CDataText -- ^ Ordinary character data; pretty printer escapes &, < etc. + | CDataVerbatim -- ^ Unescaped character data; pretty printer embeds it in case (qURI q1, qURI q2) of + (Nothing,Nothing) -> compare (qPrefix q1) (qPrefix q2) + (u1,u2) -> compare u1 u2 + x -> x + +class Node t where + node :: QName -> t -> Element + +instance Node ([Attr],[Content]) where + node n (attrs,cont) = Element { elName = n + , elAttribs = attrs + , elContent = cont + , elLine = Nothing + } + +instance Node [Attr] where node n as = node n (as,[]::[Content]) +instance Node Attr where node n a = node n [a] +instance Node () where node n () = node n ([]::[Attr]) + +instance Node [Content] where node n cs = node n ([]::[Attr],cs) +instance Node Content where node n c = node n [c] +instance Node ([Attr],Content) where node n (as,c) = node n (as,[c]) +instance Node (Attr,Content) where node n (a,c) = node n ([a],[c]) + +instance Node ([Attr],[Element]) where + node n (as,cs) = node n (as,map Elem cs) + +instance Node ([Attr],Element) where node n (as,c) = node n (as,[c]) +instance Node (Attr,Element) where node n (a,c) = node n ([a],c) +instance Node [Element] where node n es = node n ([]::[Attr],es) +instance Node Element where node n e = node n [e] + +instance Node ([Attr],[CData]) where + node n (as,cs) = node n (as,map Text cs) + +instance Node ([Attr],CData) where node n (as,c) = node n (as,[c]) +instance Node (Attr,CData) where node n (a,c) = node n ([a],c) +instance Node [CData] where node n es = node n ([]::[Attr],es) +instance Node CData where node n e = node n [e] + +instance Node ([Attr],Text) where + node n (as,t) = node n (as, CData { cdVerbatim = CDataText + , cdData = t + , cdLine = Nothing }) + +instance Node (Attr,Text ) where node n (a,t) = node n ([a],t) +instance Node Text where node n t = node n ([]::[Attr],t) + +-- | Create node with unqualified name +unode :: Node t => Text -> t -> Element +unode = node . unqual + +unqual :: Text -> QName +unqual x = QName x Nothing Nothing + +-- | Add an attribute to an element. +add_attr :: Attr -> Element -> Element +add_attr a e = add_attrs [a] e + +-- | Add some attributes to an element. +add_attrs :: [Attr] -> Element -> Element +add_attrs as e = e { elAttribs = as ++ elAttribs e } + +-- +-- conversion from xml-light +-- + +fromXLQName :: XL.QName -> QName +fromXLQName qn = QName { qName = T.pack $ XL.qName qn + , qURI = T.pack <$> XL.qURI qn + , qPrefix = T.pack <$> XL.qPrefix qn } + +fromXLCData :: XL.CData -> CData +fromXLCData cd = CData { cdVerbatim = case XL.cdVerbatim cd of + XL.CDataText -> CDataText + XL.CDataVerbatim -> CDataVerbatim + XL.CDataRaw -> CDataRaw + , cdData = T.pack $ XL.cdData cd + , cdLine = XL.cdLine cd } + +fromXLElement :: XL.Element -> Element +fromXLElement el = Element { elName = fromXLQName $ XL.elName el + , elAttribs = map fromXLAttr $ XL.elAttribs el + , elContent = map fromXLContent $ XL.elContent el + , elLine = XL.elLine el } + +fromXLAttr :: XL.Attr -> Attr +fromXLAttr (XL.Attr qn s) = Attr (fromXLQName qn) (T.pack s) + +fromXLContent :: XL.Content -> Content +fromXLContent (XL.Elem el) = Elem $ fromXLElement el +fromXLContent (XL.Text cd) = Text $ fromXLCData cd +fromXLContent (XL.CRef s) = CRef (T.pack s) + + -- cgit v1.2.3