-- ------------------------------------------------------------

{- |
   Module     : Yuuko.Text.XML.HXT.DOM.FormatXmlTree
   Copyright  : Copyright (C) 2008 Uwe Schmidt
   License    : MIT

   Maintainer : Uwe Schmidt (uwe@fh-wedel.de)
   Stability  : stable
   Portability: portable

   Format a xml tree in tree representation

-}

-- ------------------------------------------------------------

module Yuuko.Text.XML.HXT.DOM.FormatXmlTree
    ( formatXmlTree
    , formatXmlContents
    )
where

import Yuuko.Text.XML.HXT.DOM.Interface
import Yuuko.Text.XML.HXT.DOM.ShowXml
import Yuuko.Text.XML.HXT.DOM.XmlNode

import Data.Maybe

-- ------------------------------------------------------------


formatXmlContents	:: XmlTree -> XmlTrees
formatXmlContents t
    = [mkText (formatXmlTree t)]

formatXmlTree		:: XmlTree  -> String
formatXmlTree
    = formatTree xnode2String

xnode2String	:: XNode -> String
xnode2String n
    | isElem n
	= "XTag " ++ showName n ++ showAtts n
    | isPi n
	= "XPi "  ++ showName n ++ showAtts n
    | otherwise
	= show n
    where

showName	:: XNode -> String
showName	= maybe "" showQn . getName

showAtts	:: XNode -> String
showAtts	= concatMap showAl . fromMaybe [] . getAttrl

showAl		:: XmlTree -> String
showAl t	-- (NTree (XAttr an) av)
    | isAttr t
	= "\n|   " ++ (maybe "" showQn . getName $ t) ++ "=" ++ show (xshow . getChildren $ t)
    | otherwise
	= show t

showQn		:: QName -> String
showQn n
    | null ns
	= show $ qualifiedName n
    | otherwise
	= show $ "{" ++ ns ++ "}" ++ qualifiedName n
    where
    ns = namespaceUri n

-- ------------------------------------------------------------