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-rw-r--r--src/Text/Pandoc.hs3
-rw-r--r--src/Text/Pandoc/Writers/OPML.hs81
-rw-r--r--src/Text/Pandoc/XML.hs9
3 files changed, 92 insertions, 1 deletions
diff --git a/src/Text/Pandoc.hs b/src/Text/Pandoc.hs
index 80ddb72d7..ca923d091 100644
--- a/src/Text/Pandoc.hs
+++ b/src/Text/Pandoc.hs
@@ -86,6 +86,7 @@ module Text.Pandoc
, writeHtml
, writeHtmlString
, writeDocbook
+ , writeOPML
, writeOpenDocument
, writeMan
, writeMediaWiki
@@ -131,6 +132,7 @@ import Text.Pandoc.Writers.Docx
import Text.Pandoc.Writers.EPUB
import Text.Pandoc.Writers.FB2
import Text.Pandoc.Writers.Docbook
+import Text.Pandoc.Writers.OPML
import Text.Pandoc.Writers.OpenDocument
import Text.Pandoc.Writers.Man
import Text.Pandoc.Writers.RTF
@@ -230,6 +232,7 @@ writers = [
writeHtmlString o{ writerSlideVariant = DZSlides
, writerHtml5 = True })
,("docbook" , PureStringWriter writeDocbook)
+ ,("opml" , PureStringWriter writeOPML)
,("opendocument" , PureStringWriter writeOpenDocument)
,("latex" , PureStringWriter writeLaTeX)
,("beamer" , PureStringWriter $ \o ->
diff --git a/src/Text/Pandoc/Writers/OPML.hs b/src/Text/Pandoc/Writers/OPML.hs
new file mode 100644
index 000000000..d6c0aa21a
--- /dev/null
+++ b/src/Text/Pandoc/Writers/OPML.hs
@@ -0,0 +1,81 @@
+{-
+Copyright (C) 2013 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.Writers.OPML
+ Copyright : Copyright (C) 2013 John MacFarlane
+ License : GNU GPL, version 2 or above
+
+ Maintainer : John MacFarlane <jgm@berkeley.edu>
+ Stability : alpha
+ Portability : portable
+
+Conversion of 'Pandoc' documents to OPML XML.
+-}
+module Text.Pandoc.Writers.OPML ( writeOPML) where
+import Text.Pandoc.Definition
+import Text.Pandoc.XML
+import Text.Pandoc.Shared
+import Text.Pandoc.Options
+import Text.Pandoc.Templates (renderTemplate)
+import Text.Pandoc.Writers.HTML (writeHtmlString)
+import Text.Pandoc.Writers.Markdown (writeMarkdown)
+import Data.List ( intercalate )
+import Text.Pandoc.Pretty
+
+-- | Convert Pandoc document to string in OPML format.
+writeOPML :: WriterOptions -> Pandoc -> String
+writeOPML opts (Pandoc (Meta tit auths dat) blocks) =
+ let title = writeHtmlInlines tit
+ author = writeHtmlInlines $ intercalate [Space,Str ";",Space] auths
+ date = trim $ writeHtmlInlines dat
+ elements = hierarchicalize blocks
+ colwidth = if writerWrapText opts
+ then Just $ writerColumns opts
+ else Nothing
+ render' = render colwidth
+ main = render' $ vcat (map (elementToOPML opts) elements)
+ context = writerVariables opts ++
+ [ ("body", main)
+ , ("title", title)
+ , ("date", date)
+ , ("author", author) ]
+ in if writerStandalone opts
+ then renderTemplate context $ writerTemplate opts
+ else main
+
+writeHtmlInlines :: [Inline] -> String
+writeHtmlInlines ils = trim $ writeHtmlString def
+ $ Pandoc (Meta [] [] []) [Plain ils]
+
+-- | Convert an Element to OPML.
+elementToOPML :: WriterOptions -> Element -> Doc
+elementToOPML _ (Blk _) = empty
+elementToOPML opts (Sec _ _num _ title elements) =
+ let isBlk (Blk _) = True
+ isBlk _ = False
+ fromBlk (Blk x) = x
+ fromBlk _ = error "fromBlk called on non-block"
+ (blocks, rest) = span isBlk elements
+ attrs = [("text", writeHtmlInlines title)] ++
+ [("_note", writeMarkdown opts (Pandoc (Meta [] [] [])
+ (map fromBlk blocks)))
+ | not (null blocks)]
+ in inTags True "outline" attrs $
+ vcat (map (elementToOPML opts) rest)
+
diff --git a/src/Text/Pandoc/XML.hs b/src/Text/Pandoc/XML.hs
index 31279c3bb..3f684f728 100644
--- a/src/Text/Pandoc/XML.hs
+++ b/src/Text/Pandoc/XML.hs
@@ -64,11 +64,18 @@ escapeCharForXML x = case x of
escapeStringForXML :: String -> String
escapeStringForXML = concatMap escapeCharForXML
+-- | Escape newline characters as &#10;
+escapeNls :: String -> String
+escapeNls (x:xs)
+ | x == '\n' = "&#10;" ++ escapeNls xs
+ | otherwise = x : escapeNls xs
+escapeNls [] = []
+
-- | Return a text object with a string of formatted XML attributes.
attributeList :: [(String, String)] -> Doc
attributeList = hcat . map
(\(a, b) -> text (' ' : escapeStringForXML a ++ "=\"" ++
- escapeStringForXML b ++ "\""))
+ escapeNls (escapeStringForXML b) ++ "\""))
-- | Put the supplied contents between start and end tags of tagType,
-- with specified attributes and (if specified) indentation.