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Diffstat (limited to 'src/Text/Pandoc/Readers/Org/ExportSettings.hs')
| -rw-r--r-- | src/Text/Pandoc/Readers/Org/ExportSettings.hs | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Readers/Org/ExportSettings.hs b/src/Text/Pandoc/Readers/Org/ExportSettings.hs new file mode 100644 index 000000000..b48acc9c4 --- /dev/null +++ b/src/Text/Pandoc/Readers/Org/ExportSettings.hs @@ -0,0 +1,167 @@ +{- +Copyright (C) 2014-2016 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de> + +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.Org.Options + Copyright : Copyright (C) 2016 Albert Krewinkel + License : GNU GPL, version 2 or above + + Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de> + +Parsers for Org-mode export options. +-} +module Text.Pandoc.Readers.Org.ExportSettings + ( exportSettings + ) where + +import Text.Pandoc.Readers.Org.ParserState +import Text.Pandoc.Readers.Org.Parsing + +import Control.Monad ( mzero, void ) +import Data.Char ( toLower ) +import Data.Maybe ( listToMaybe ) + +-- | Read and handle space separated org-mode export settings. +exportSettings :: OrgParser () +exportSettings = void $ sepBy spaces exportSetting + +-- | Setter function for export settings. +type ExportSettingSetter a = a -> ExportSettings -> ExportSettings + +-- | Read and process a single org-mode export option. +exportSetting :: OrgParser () +exportSetting = choice + [ booleanSetting "^" (\val es -> es { exportSubSuperscripts = val }) + , booleanSetting "'" (\val es -> es { exportSmartQuotes = val }) + , booleanSetting "*" (\val es -> es { exportEmphasizedText = val }) + , booleanSetting "-" (\val es -> es { exportSpecialStrings = val }) + , ignoredSetting ":" + , ignoredSetting "<" + , ignoredSetting "\\n" + , archivedTreeSetting "arch" (\val es -> es { exportArchivedTrees = val }) + , ignoredSetting "author" + , ignoredSetting "c" + , ignoredSetting "creator" + , complementableListSetting "d" (\val es -> es { exportDrawers = val }) + , ignoredSetting "date" + , ignoredSetting "e" + , ignoredSetting "email" + , ignoredSetting "f" + , integerSetting "H" (\val es -> es { exportHeadlineLevels = val }) + , ignoredSetting "inline" + , ignoredSetting "num" + , ignoredSetting "p" + , ignoredSetting "pri" + , ignoredSetting "prop" + , ignoredSetting "stat" + , ignoredSetting "tags" + , ignoredSetting "tasks" + , ignoredSetting "tex" + , ignoredSetting "timestamp" + , ignoredSetting "title" + , ignoredSetting "toc" + , ignoredSetting "todo" + , ignoredSetting "|" + ] <?> "export setting" + +genericExportSetting :: OrgParser a + -> String + -> ExportSettingSetter a + -> OrgParser () +genericExportSetting optionParser settingIdentifier setter = try $ do + _ <- string settingIdentifier *> char ':' + value <- optionParser + updateState $ modifyExportSettings value + where + modifyExportSettings val st = + st { orgStateExportSettings = setter val . orgStateExportSettings $ st } + +-- | A boolean option, either nil (False) or non-nil (True). +booleanSetting :: String -> ExportSettingSetter Bool -> OrgParser () +booleanSetting = genericExportSetting elispBoolean + +-- | An integer-valued option. +integerSetting :: String -> ExportSettingSetter Int -> OrgParser () +integerSetting = genericExportSetting parseInt + where + parseInt = try $ + many1 digit >>= maybe mzero (return . fst) . listToMaybe . reads + +-- | Either the string "headline" or an elisp boolean and treated as an +-- @ArchivedTreesOption@. +archivedTreeSetting :: String + -> ExportSettingSetter ArchivedTreesOption + -> OrgParser () +archivedTreeSetting = + genericExportSetting $ archivedTreesHeadlineSetting <|> archivedTreesBoolean + where + archivedTreesHeadlineSetting = try $ do + _ <- string "headline" + lookAhead (newline <|> spaceChar) + return ArchivedTreesHeadlineOnly + + archivedTreesBoolean = try $ do + exportBool <- elispBoolean + return $ + if exportBool + then ArchivedTreesExport + else ArchivedTreesNoExport + +-- | A list or a complement list (i.e. a list starting with `not`). +complementableListSetting :: String + -> ExportSettingSetter (Either [String] [String]) + -> OrgParser () +complementableListSetting = genericExportSetting $ choice + [ Left <$> complementStringList + , Right <$> stringList + , (\b -> if b then Left [] else Right []) <$> elispBoolean + ] + where + -- Read a plain list of strings. + stringList :: OrgParser [String] + stringList = try $ + char '(' + *> sepBy elispString spaces + <* char ')' + + -- Read an emacs lisp list specifying a complement set. + complementStringList :: OrgParser [String] + complementStringList = try $ + string "(not " + *> sepBy elispString spaces + <* char ')' + + elispString :: OrgParser String + elispString = try $ + char '"' + *> manyTill alphaNum (char '"') + +-- | Read but ignore the export setting. +ignoredSetting :: String -> OrgParser () +ignoredSetting s = try (() <$ string s <* char ':' <* many1 nonspaceChar) + +-- | Read an elisp boolean. Only NIL is treated as false, non-NIL values are +-- interpreted as true. +elispBoolean :: OrgParser Bool +elispBoolean = try $ do + value <- many1 nonspaceChar + return $ case map toLower value of + "nil" -> False + "{}" -> False + "()" -> False + _ -> True |