Textile reader: Support >, <, =, <> text alignment attributes.

Closes #2674.

src/Text/Pandoc/Readers/Textile.hs

@@ -583,7 +583,18 @@ code2 = do
 
 -- | Html / CSS attributes
 attributes :: Parser [Char] ParserState Attr
-attributes = (foldl (flip ($)) ("",[],[])) `fmap` many attribute
+attributes = (foldl (flip ($)) ("",[],[])) <$>
+  try (do special <- option id specialAttribute
+          attrs <- many attribute
+          return (special : attrs))
+
+specialAttribute :: Parser [Char] ParserState (Attr -> Attr)
+specialAttribute = do
+  alignStr <- ("center" <$ char '=') <|>
+    ("justify" <$ try (string "<>")) <|>
+    ("right" <$ char '>') <|>
+    ("left" <$ char '<')
+  return $ addStyle ("text-align:" ++ alignStr)
 
 attribute :: Parser [Char] ParserState (Attr -> Attr)
 attribute = classIdAttr <|> styleAttr <|> langAttr
@@ -602,7 +613,13 @@ classIdAttr = try $ do -- (class class #id)
 styleAttr :: Parser [Char] ParserState (Attr -> Attr)
 styleAttr = do
   style <- try $ enclosed (char '{') (char '}') anyChar'
-  return $ \(id',classes,keyvals) -> (id',classes,("style",style):keyvals)
+  return $ addStyle style
+
+addStyle :: String -> Attr -> Attr
+addStyle style (id',classes,keyvals) =
+  (id',classes,keyvals')
+  where keyvals' = ("style", style') : [(k,v) | (k,v) <- keyvals, k /= "style"]
+        style' = style ++ ";" ++ concat [v | ("style",v) <- keyvals]
 
 langAttr :: Parser [Char] ParserState (Attr -> Attr)
 langAttr = do

tests/textile-reader.native

@@ -132,8 +132,11 @@ Pandoc (Meta {unMeta = fromList []})
 ,Header 1 ("images",[],[]) [Str "Images"]
 ,Para [Str "Textile",Space,Str "inline",Space,Str "image",Space,Str "syntax,",Space,Str "like",LineBreak,Str "here",Space,Image ("",[],[]) [Str "this is the alt text"] ("this_is_an_image.png","this is the alt text"),LineBreak,Str "and",Space,Str "here",Space,Image ("",[],[]) [Str ""] ("this_is_an_image.png",""),Str "."]
 ,Header 1 ("attributes",[],[]) [Str "Attributes"]
-,Header 2 ("ident",["bar","foo"],[("style","color:red"),("lang","en")]) [Str "HTML",Space,Str "and",Space,Str "CSS",Space,Str "attributes",Space,Str "are",Space,Str "parsed",Space,Str "in",Space,Str "headers."]
-,Para [Str "as",Space,Str "well",Space,Str "as",Space,Strong [Span ("",["foo"],[]) [Str "inline",Space,Str "attributes"]],Space,Str "of",Space,Span ("",[],[("style","color:red")]) [Str "all",Space,Str "kind"]]
+,Header 2 ("ident",["bar","foo"],[("style","color:red;"),("lang","en")]) [Str "HTML",Space,Str "and",Space,Str "CSS",Space,Str "attributes",Space,Str "are",Space,Str "parsed",Space,Str "in",Space,Str "headers."]
+,Header 2 ("centered",[],[("style","text-align:center;")]) [Str "Centered"]
+,Header 2 ("right",[],[("style","text-align:right;")]) [Str "Right"]
+,Header 2 ("justified",[],[("lang","en"),("style","color:blue;text-align:justify;")]) [Str "Justified"]
+,Para [Str "as",Space,Str "well",Space,Str "as",Space,Strong [Span ("",["foo"],[]) [Str "inline",Space,Str "attributes"]],Space,Str "of",Space,Span ("",[],[("style","color:red;")]) [Str "all",Space,Str "kind"]]
 ,Para [Str "and",Space,Str "paragraph",Space,Str "attributes,",Space,Str "and",Space,Str "table",Space,Str "attributes."]
 ,Table [] [AlignDefault,AlignDefault,AlignDefault] [0.0,0.0,0.0]
  []

tests/textile-reader.textile

@@ -207,6 +207,12 @@ h1. Attributes
 
 h2[en]{color:red}(foo bar #ident). HTML and CSS attributes are parsed in headers.
 
+h2=. Centered
+
+h2>. Right
+
+h2<>{color:blue}[en]. Justified
+
 as well as *(foo)inline attributes* of %{color:red} all kind%
 
 p{color:green}. and paragraph attributes, and table attributes.