From f85232947e74ee7ef8c7b0ad2338212e7e68f1be Mon Sep 17 00:00:00 2001
From: krasimir <krasimir@chalmers.se>
Date: Sun, 13 Dec 2009 18:50:29 +0000
Subject: reorganize the directories under src, and rescue the JavaScript
 interpreter from deprecated

---
 src/compiler/GF/Data/XML.hs | 58 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/compiler/GF/Data/XML.hs

(limited to 'src/compiler/GF/Data/XML.hs')

diff --git a/src/compiler/GF/Data/XML.hs b/src/compiler/GF/Data/XML.hs
new file mode 100644
index 000000000..bdc6f98a1
--- /dev/null
+++ b/src/compiler/GF/Data/XML.hs
@@ -0,0 +1,58 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : XML
+--
+-- Utilities for creating XML documents.
+----------------------------------------------------------------------
+module GF.Data.XML (XML(..), Attr, comments, showXMLDoc, showsXMLDoc, showsXML, bottomUpXML) where
+
+import GF.Data.Utilities
+import GF.Text.UTF8
+
+data XML = Data String | CData String | Tag String [Attr] [XML] | ETag String [Attr] | Comment String | Empty
+ deriving (Ord,Eq,Show)
+
+type Attr = (String,String)
+
+comments :: [String] -> [XML]
+comments = map Comment
+
+showXMLDoc :: XML -> String
+showXMLDoc xml = showsXMLDoc xml ""
+
+showsXMLDoc :: XML -> ShowS
+showsXMLDoc xml = encodeUTF8 . showString header . showsXML xml
+  where header = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
+
+showsXML :: XML -> ShowS
+showsXML = showsX 0 where
+  showsX i x = ind i . case x of
+    (Data s) -> showString s
+    (CData s) -> showString "<![CDATA[" . showString s .showString "]]>"
+    (ETag t as) -> showChar '<' . showString t . showsAttrs as . showString "/>"
+    (Tag t as cs) -> 
+      showChar '<' . showString t . showsAttrs as . showChar '>' . 
+      concatS (map (showsX (i+1)) cs) . ind i . 
+      showString "</" . showString t . showChar '>'
+    (Comment c) -> showString "<!-- " . showString c . showString " -->"
+    (Empty) -> id
+  ind i = showString ("\n" ++ replicate (2*i) ' ')
+
+showsAttrs :: [Attr] -> ShowS
+showsAttrs = concatS . map (showChar ' ' .) . map showsAttr
+
+showsAttr :: Attr -> ShowS
+showsAttr (n,v) = showString n . showString "=\"" . showString (escape v) . showString "\""
+
+escape :: String -> String
+escape = concatMap escChar
+  where
+  escChar '<'  = "&lt;"
+  escChar '>'  = "&gt;"
+  escChar '&'  = "&amp;"
+  escChar '"'  = "&quot;"
+  escChar c    = [c]
+
+bottomUpXML :: (XML -> XML) -> XML -> XML
+bottomUpXML f (Tag n attrs cs) = f (Tag n attrs (map (bottomUpXML f) cs))
+bottomUpXML f x = f x
-- 
cgit v1.2.3