Added Text.Pandoc.Readers.Native (readNative).

readNative can now read full pandoc documents, block lists, blocks,
inline lists, or inlines.  It will interpret

Str "hi"

as if it were

Pandoc (Meta [] [] []) [Plain [Str "hi"]]

This should make testing easier.

3 files changed, 83 insertions, 1 deletions

diff --git a/pandoc.cabal b/pandoc.cabal
index 2c0596318..29ad52a39 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -234,6 +234,7 @@ Library
                    Text.Pandoc.Readers.RST,
                    Text.Pandoc.Readers.TeXMath,
                    Text.Pandoc.Readers.Textile,
+                   Text.Pandoc.Readers.Native,
                    Text.Pandoc.Writers.Native,
                    Text.Pandoc.Writers.Docbook,
                    Text.Pandoc.Writers.HTML,
diff --git a/src/Text/Pandoc.hs b/src/Text/Pandoc.hs
index dd1b3892d..de41bcbc8 100644
--- a/src/Text/Pandoc.hs
+++ b/src/Text/Pandoc.hs
@@ -114,6 +114,7 @@ import Text.Pandoc.Readers.RST
 import Text.Pandoc.Readers.LaTeX
 import Text.Pandoc.Readers.HTML
 import Text.Pandoc.Readers.Textile
+import Text.Pandoc.Readers.Native
 import Text.Pandoc.Writers.Native
 import Text.Pandoc.Writers.Markdown
 import Text.Pandoc.Writers.RST 
@@ -143,7 +144,7 @@ pandocVersion = showVersion version
 
 -- | Association list of formats and readers.
 readers :: [(String, ParserState -> String -> Pandoc)]
-readers = [("native"       , \_ -> read)
+readers = [("native"       , \_ -> readNative)
           ,("json"         , \_ -> decodeJSON)
           ,("markdown"     , readMarkdown)
           ,("markdown+lhs" , \st ->
diff --git a/src/Text/Pandoc/Readers/Native.hs b/src/Text/Pandoc/Readers/Native.hs
new file mode 100644
index 000000000..123ac561d
--- /dev/null
+++ b/src/Text/Pandoc/Readers/Native.hs
@@ -0,0 +1,80 @@
+{-
+Copyright (C) 2011 John MacFarlane <jgm@berkeley.edu>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+-}
+
+{- |
+   Module      : Text.Pandoc.Readers.Native
+   Copyright   : Copyright (C) 2011 John MacFarlane
+   License     : GNU GPL, version 2 or above 
+
+   Maintainer  : John MacFarlane <jgm@berkeley.edu>
+   Stability   : alpha
+   Portability : portable
+
+Conversion of native 'Pandoc' formatted text to a 'Pandoc' document.
+-}
+module Text.Pandoc.Readers.Native ( readNative ) where
+
+import Text.Pandoc.Definition
+
+nullMeta :: Meta
+nullMeta = Meta{ docTitle = []
+               , docAuthors = []
+               , docDate = []
+               }
+
+-- | Read native formatted text and return a Pandoc document.
+-- The input may be a full pandoc document, a block list, a block,
+-- an inline list, or an inline.  Thus, for example,
+--
+-- > Str "hi"
+--
+-- will be treated as if it were
+--
+-- > Pandoc (Meta [] [] []) [Plain [Str "hi"]]
+--
+readNative :: String      -- ^ String to parse (assuming @'\n'@ line endings)
+           -> Pandoc
+readNative s =
+  case reads s of
+       (d,_):_    -> d
+       []         -> Pandoc nullMeta $ readBlocks s
+
+readBlocks :: String -> [Block]
+readBlocks s =
+  case reads s of
+       (d,_):_    -> d
+       []         -> [readBlock s]
+
+readBlock :: String -> Block
+readBlock s =
+  case reads s of
+       (d,_):_    -> d
+       []         -> Plain $ readInlines s
+
+readInlines :: String -> [Inline]
+readInlines s =
+  case reads s of
+       (d,_):_    -> d
+       []         -> [readInline s]
+
+readInline :: String -> Inline
+readInline s =
+  case reads s of
+       (d,_):_    -> d
+       []         -> error "Cannot parse document"
+