+{-# LANGUAGE
+ Arrows
+ , OverloadedStrings
+ , TypeOperators
+ , UnicodeSyntax
+ , ViewPatterns
+ #-}
module Rakka.Wiki.Formatter
( formatWikiBlocks
)
where
-
-import Control.Arrow
-import Control.Arrow.ArrowList
-import Data.Char
-import Data.List
-import Data.Maybe
-import Network.URI
-import Rakka.Page
-import Rakka.Wiki
-import Text.XML.HXT.Arrow.XmlArrow
-import Text.XML.HXT.DOM.TypeDefs
-
+import Control.Arrow
+import Control.Arrow.ArrowIf
+import Control.Arrow.ArrowList
+import Control.Arrow.ArrowTree
+import Control.Arrow.Unicode
+import qualified Data.CaseInsensitive as CS
+import Data.Maybe
+import Data.Monoid.Unicode
+import Data.Text (Text)
+import qualified Data.Text as T
+import Network.URI hiding (fragment)
+import Prelude.Unicode
+import Rakka.Page
+import Rakka.Wiki
+import Text.XML.HXT.Arrow.XmlArrow
+import Text.XML.HXT.DOM.TypeDefs
formatWikiBlocks :: (ArrowXml a, ArrowChoice a) => a (URI, [BlockElement]) XmlTree
formatWikiBlocks
= proc (baseURI, blocks)
- -> do block <- arrL id -< blocks
- formatBlock -< (baseURI, block)
+ -> do block <- arrL id -< blocks
+ tree <- formatBlock -< (baseURI, block)
+ attachXHtmlNS -< tree
+
+formatElement :: (ArrowXml a, ArrowChoice a) => a (URI, Element) XmlTree
+formatElement
+ = proc (baseURI, e)
+ -> case e of
+ Block b -> formatBlock -< (baseURI, b)
+ Inline i -> formatInline -< (baseURI, i)
-formatBlock :: (ArrowXml a, ArrowChoice a) => a (URI, BlockElement) XmlTree
+formatBlock ∷ (ArrowXml (⇝), ArrowChoice (⇝)) ⇒ (URI, BlockElement) ⇝ XmlTree
formatBlock
= proc (baseURI, block)
- -> case block of
+ → case block of
Heading level text
- -> formatHeading -< (level, text)
+ → formatHeading ⤙ (level, text)
HorizontalLine
-> eelem "hr" -< ()
- List list
+ list@(List _ _)
-> formatListElement -< (baseURI, list)
DefinitionList list
Paragraph inlines
-> formatParagraph -< (baseURI, inlines)
+ Div attrs contents
+ -> formatElem "div" -< (baseURI, attrs, contents)
+
+ EmptyBlock
+ -> none -< ()
+
+ _ -> arr (error . ("formatBlock: unsupported BlockElement: " ++) . show) -< block
+ where
+ formatElem :: (ArrowXml a, ArrowChoice a) =>
+ String
+ -> a (URI, [Attribute], [Element]) XmlTree
+ formatElem name
+ = proc (baseURI, attrs, contents)
+ -> ( eelem name
+ += ( arrL (fst . snd)
+ >>>
+ attrFromPair
+ )
+ += ( (arr fst &&& arrL (snd . snd))
+ >>>
+ formatElement
+ )
+ ) -< (baseURI, (attrs, contents))
+
-formatHeading :: ArrowXml a => a (Int, String) XmlTree
+formatHeading ∷ ArrowXml (⇝) ⇒ (Int, Text) ⇝ XmlTree
formatHeading
- = proc (level, text)
- -> selem ("h" ++ show level) [txt text] -<< ()
+ = proc (level, T.unpack → text)
+ -> mkelem ("h" ⊕ show level)
+ [ sattr "id" text ]
+ [ txt text ] ⤛ ()
-formatListElement :: (ArrowXml a, ArrowChoice a) => a (URI, ListElement) XmlTree
+formatListElement :: (ArrowXml a, ArrowChoice a) => a (URI, BlockElement) XmlTree
formatListElement
= proc (baseURI, list)
-> let tag = case listType list of
-> eelem "li"
+= ( (arr fst &&& arrL snd)
>>>
- formatListItem'
+ formatElement
) -< (baseURI, item)
- formatListItem' :: (ArrowXml a, ArrowChoice a) => a (URI, Either ListElement InlineElement) XmlTree
- formatListItem'
- = proc (baseURI, x)
- -> case x of
- Left nestedList -> formatListElement -< (baseURI, nestedList)
- Right inline -> formatInline -< (baseURI, inline )
-
formatDefinitionList :: (ArrowXml a, ArrowChoice a) => a (URI, [Definition]) XmlTree
formatDefinitionList
formatInline
)
-
-formatInline :: (ArrowXml a, ArrowChoice a) => a (URI, InlineElement) XmlTree
+formatInline ∷ (ArrowXml (⇝), ArrowChoice (⇝)) ⇒ (URI, InlineElement) ⇝ XmlTree
formatInline
= proc (baseURI, i)
- -> case i of
+ → case i of
Text text
- -> mkText -< text
+ → mkText ⤙ T.unpack text
- Italic inlines
- -> ( eelem "i"
- += ( (arr fst &&& arrL snd)
- >>>
- formatInline
- )
- ) -< (baseURI, inlines)
+ Italic contents
+ -> formatElem "i" -< (baseURI, [], contents)
- Bold inlines
- -> ( eelem "b"
- += ( (arr fst &&& arrL snd)
- >>>
- formatInline
- )
- ) -< (baseURI, inlines)
+ Bold contents
+ -> formatElem "b" -< (baseURI, [], contents)
+
+ link@(ObjectLink _ _)
+ -> formatObjectLink -< (baseURI, link)
link@(PageLink _ _ _)
-> formatPageLink -< (baseURI, link)
+ link@(ExternalLink _ _)
+ -> formatExternalLink -< link
+
+ LineBreak attrs
+ -> formatElem "br" -< (baseURI, attrs, [])
+
+ Span attrs contents
+ -> formatElem "span" -< (baseURI, attrs, contents)
-formatPageLink :: (ArrowXml a) => a (URI, InlineElement) XmlTree
+ img@(Image _ _)
+ -> formatImage -< (baseURI, img)
+
+ Anchor attrs contents
+ -> formatElem "a" -< (baseURI, attrs, contents)
+
+ Input attrs
+ -> formatElem "input" -< (baseURI, attrs, [])
+
+ EmptyInline
+ -> none -< ()
+
+ _ -> arr (error . ("formatInline: unsupported InlineElement: " ++) . show) -< i
+ where
+ formatElem ∷ (ArrowXml (⇝), ArrowChoice (⇝)) ⇒
+ String
+ → (URI, [Attribute], [InlineElement]) ⇝ XmlTree
+ formatElem name
+ = proc (baseURI, attrs, contents)
+ → ( eelem name
+ += ( arrL (fst ∘ snd)
+ ⋙
+ attrFromPair
+ )
+ += ( (arr fst &&& arrL (snd . snd))
+ ⋙
+ formatInline
+ )
+ ) ⤙ (baseURI, (attrs, contents))
+
+attrFromPair ∷ ArrowXml (⇝) ⇒ Attribute ⇝ XmlTree
+attrFromPair = proc (T.unpack ∘ CS.original → name, T.unpack → value)
+ → attr name (txt value) ⤛ ()
+
+formatObjectLink ∷ ArrowXml (⇝) ⇒ (URI, InlineElement) ⇝ XmlTree
+formatObjectLink
+ = proc (baseURI, ObjectLink page text)
+ → let uri = mkObjectURI baseURI page
+ label = fromMaybe ("{" ⊕ page ⊕ "}") text
+ in
+ mkAnchor ⤙ (uri, label)
+
+formatPageLink ∷ ArrowXml (⇝) ⇒ (URI, InlineElement) ⇝ XmlTree
formatPageLink
= proc (baseURI, PageLink page fragment text)
- -> let uri = case (page, fragment) of
- (Just x, Just y) -> mkPageFragmentURI baseURI (fix x) y
- (Just x, Nothing) -> mkPageURI baseURI (fix x)
- (Nothing, Just y) -> nullURI { uriFragment = ('#':y) }
- fix = (\ (x:xs) -> toUpper x : xs) . map (\ c -> if c == ' ' then '_' else c)
- href = uriToString id uri ""
- dLabel = fromMaybe "" page ++ fromMaybe "" (fmap ('#':) fragment)
- label = fromMaybe dLabel text
- in
- ( eelem "a"
- += attr "href" (arr fst >>> mkText)
- += (arr snd >>> mkText)
- ) -< (href, label)
+ → let uri = case (page, fragment) of
+ (Just x, Just y) → mkPageFragmentURI baseURI x y
+ (Just x, Nothing) → mkPageURI baseURI x
+ (Nothing, Just y) → mkFragmentURI y
+ _ → (⊥)
+ dLabel = fromMaybe (∅) page ⊕ maybe (∅) (T.cons '#') fragment
+ label = fromMaybe dLabel text
+ in
+ mkAnchor ⤙ (uri, label)
+
+formatImage ∷ ArrowXml (⇝) ⇒ (URI, InlineElement) ⇝ XmlTree
+formatImage = proc (baseURI, Image src alt)
+ → let uri = case src of
+ Left u → u
+ Right name → mkObjectURI baseURI name
+ href = uriToString id uri ""
+ in
+ ( eelem "img"
+ += sattr "src" href
+ += ( case alt of
+ Just x → sattr "alt" (T.unpack x)
+ Nothing → none
+ )
+ ) ⤛ ()
+
+
+formatExternalLink ∷ ArrowXml (⇝) ⇒ InlineElement ⇝ XmlTree
+formatExternalLink
+ = proc (ExternalLink uri text)
+ → let href = uriToString id uri ""
+ label = fromMaybe (T.pack href) text
+ in
+ mkAnchor -< (uri, label)
+
+mkAnchor ∷ ArrowXml (⇝) ⇒ (URI, Text) ⇝ XmlTree
+mkAnchor = eelem "a"
+ += attr "href" (arr (flip (uriToString id) "" ∘ fst) ⋙ mkText)
+ += (arr (T.unpack ∘ snd) ⋙ mkText)
+
+attachXHtmlNS ∷ ArrowXml (⇝) ⇒ XmlTree ⇝ XmlTree
+attachXHtmlNS = processTopDown (changeQName attach `when` isElem)
+ where
+ attach ∷ QName → QName
+ attach = setNamespaceUri' (newXName "http://www.w3.org/1999/xhtml")
projects / Rakka.git / blobdiff