Created
April 1, 2015 20:57
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type WithST h r = Eff (st:: ST h | r) | |
add :: forall h r. STRef h String -> String -> WithST h r String | |
add ref str = modifySTRef ref (++ str) | |
renderST :: Element -> String | |
renderST = pureST <<< renderElemST | |
renderElemST :: forall h r. Element -> WithST h r String | |
renderElemST e = do | |
c <- newSTRef "" | |
addElement c e | |
addElement :: forall h r. STRef h String -> Element -> WithST h r String | |
addElement c (Element e) = do | |
add c $ "<"++e.name | |
for_ e.attribs $ \a -> do | |
add c " " | |
addAttribute c a | |
addContent c e.content e.name | |
addAttribute :: forall h r. STRef h String -> Attribute -> | |
WithST h r String | |
addAttribute ref (Attribute {key = k, value = (Just v)}) = | |
add ref (k++"=\""++v++"\"") | |
addContent :: forall h r. STRef h String -> Maybe (Content Unit) -> | |
String -> WithST h r String | |
addContent ref Nothing _ = add ref " />" | |
addContent ref (Just (Content content)) name = do | |
add ref ">" | |
goEff (addContentItem ref) content | |
add ref "</" | |
add ref name | |
add ref ">" | |
addContentItem :: forall h r a. STRef h String -> | |
ContentF (Free ContentF a) -> | |
WithST h r (Free ContentF a) | |
addContentItem ref (TextContent s a) = do | |
add ref s | |
return a | |
addContentItem ref (ElementContent e a) = do | |
addElement ref e | |
return a | |
addContentItem ref (CommentContent c a) = do | |
add ref "<!-- " | |
add ref c | |
add ref " -->" | |
return a |
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