Moved escape and nullBlock parsers from ParserCombinators/Pandoc

to Pandoc/Shared.  Reason:  ParserCombinators/Pandoc is for
general-purpose parsers that don't require Pandoc.Definition.
Also removed some unnecessary imports from Pandoc/Shared.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@584 788f1e2b-df1e-0410-8736-df70ead52e1b

src/Text/Pandoc/Shared.hs

@@ -54,6 +54,8 @@ module Text.Pandoc.Shared (
                      QuoteContext (..),
                      ParserState (..),
                      defaultParserState,
+                     nullBlock,
+                     escaped,
                      -- * Native format prettyprinting
                      prettyPandoc,
                      -- * Pandoc block list processing
@@ -68,10 +70,8 @@ module Text.Pandoc.Shared (
                      refsMatch,
                     ) where
 import Text.Pandoc.Definition
-import Text.ParserCombinators.Parsec as Parsec
+import Text.ParserCombinators.Parsec
 import Text.Pandoc.Entities ( decodeEntities, escapeStringForXML )
-import Text.PrettyPrint.HughesPJ as PP ( text, char, (<>), 
-                                         ($$), nest, Doc, isEmpty )
 import Data.Char ( toLower, ord )
 import Data.List ( find, groupBy, isPrefixOf )
 
@@ -172,6 +172,21 @@ defaultParserState =
                   stateColumns         = 80,
                   stateHeaderTable     = [] }
 
+-- | Parses a character and returns 'Null' (so that the parser can move on
+-- if it gets stuck).
+nullBlock :: GenParser Char st Block
+nullBlock = do
+  anyChar 
+  return Null
+
+-- | Parses backslash, then applies character parser.
+escaped :: GenParser Char st Char  -- ^ Parser for character to escape
+        -> GenParser Char st Inline
+escaped parser = try (do
+                        char '\\'
+                        result <- parser
+                        return (Str [result]))
+
 -- | Indent string as a block.
 indentBy :: Int    -- ^ Number of spaces to indent the block 
          -> Int    -- ^ Number of spaces (rel to block) to indent first line

src/Text/ParserCombinators/Pandoc.hs

@@ -44,7 +44,6 @@ module Text.ParserCombinators.Pandoc (
                                       lineClump
                                      ) where
 import Text.ParserCombinators.Parsec
-import Text.Pandoc.Definition
 import Text.Pandoc.Shared
 import Data.Char ( toUpper, toLower )
 
@@ -52,13 +51,6 @@ import Data.Char ( toUpper, toLower )
 anyLine :: GenParser Char st [Char]
 anyLine = manyTill anyChar (newline <|> (do{eof; return '\n'}))
 
--- | Parses a character and returns 'Null' (so that the parser can move on
--- if it gets stuck).
-nullBlock :: GenParser Char st Block
-nullBlock = do
-  anyChar 
-  return Null
-
 -- | Parses a space or tab.
 spaceChar :: CharParser st Char
 spaceChar = oneOf " \t"
@@ -77,14 +69,6 @@ blankline = try (do
 blanklines :: GenParser Char st [Char]
 blanklines = try (many1 blankline)
 
--- | Parses backslash, then applies character parser.
-escaped :: GenParser Char st Char  -- ^ Parser for character to escape
-        -> GenParser Char st Inline
-escaped parser = try (do
-                        char '\\'
-                        result <- parser
-                        return (Str [result]))
-
 -- | Parses material enclosed between start and end parsers.
 enclosed :: GenParser Char st t   -- ^ start parser
 	    -> GenParser Char st end  -- ^ end parser