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{-# LANGUAGE DeriveDataTypeable, DeriveGeneric, FlexibleContexts, CPP #-}
{-
Copyright (C) 2006-2013 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.Definition
Copyright : Copyright (C) 2006-2010 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Definition of 'Pandoc' data structure for format-neutral representation
of documents.
-}
module Text.Pandoc.Definition ( Pandoc(..)
, Meta(..)
, MetaValue(..)
, nullMeta
, isNullMeta
, lookupMeta
, docTitle
, docAuthors
, docDate
, Block(..)
, Inline(..)
, Alignment(..)
, ListAttributes
, ListNumberStyle(..)
, ListNumberDelim(..)
, Format(..)
, Attr
, nullAttr
, TableCell
, QuoteType(..)
, Target
, MathType(..)
, Citation(..)
, CitationMode(..)
, pandocTypesVersion
) where
import Data.Generics (Data, Typeable)
import Data.Ord (comparing)
import Data.Aeson (FromJSON(..), ToJSON(..))
import qualified Data.Aeson.Types as Aeson
import Control.Monad (guard)
import qualified Data.Map as M
import GHC.Generics (Generic, Rep (..))
import Data.String
import Data.Char (toLower)
import Data.Monoid
#if MIN_VERSION_base(4,8,0)
import Control.DeepSeq
#else
import Control.DeepSeq.Generics
#endif
import Paths_pandoc_types (version)
import Data.Version (Version)
data Pandoc = Pandoc Meta [Block]
deriving (Eq, Ord, Read, Show, Typeable, Data, Generic)
instance Monoid Pandoc where
mempty = Pandoc mempty mempty
(Pandoc m1 bs1) `mappend` (Pandoc m2 bs2) =
Pandoc (m1 `mappend` m2) (bs1 `mappend` bs2)
-- | Metadata for the document: title, authors, date.
newtype Meta = Meta { unMeta :: M.Map String MetaValue }
deriving (Eq, Ord, Show, Read, Typeable, Data, Generic)
instance Monoid Meta where
mempty = Meta (M.empty)
(Meta m1) `mappend` (Meta m2) = Meta (M.union m1 m2)
-- note: M.union is left-biased, so if there are fields in both m1
-- and m2, m1 wins.
data MetaValue = MetaMap (M.Map String MetaValue)
| MetaList [MetaValue]
| MetaBool Bool
| MetaString String
| MetaInlines [Inline]
| MetaBlocks [Block]
deriving (Eq, Ord, Show, Read, Typeable, Data, Generic)
nullMeta :: Meta
nullMeta = Meta M.empty
isNullMeta :: Meta -> Bool
isNullMeta (Meta m) = M.null m
-- Helper functions to extract metadata
-- | Retrieve the metadata value for a given @key@.
lookupMeta :: String -> Meta -> Maybe MetaValue
lookupMeta key (Meta m) = M.lookup key m
-- | Extract document title from metadata; works just like the old @docTitle@.
docTitle :: Meta -> [Inline]
docTitle meta =
case lookupMeta "title" meta of
Just (MetaString s) -> [Str s]
Just (MetaInlines ils) -> ils
Just (MetaBlocks [Plain ils]) -> ils
Just (MetaBlocks [Para ils]) -> ils
_ -> []
-- | Extract document authors from metadata; works just like the old
-- @docAuthors@.
docAuthors :: Meta -> [[Inline]]
docAuthors meta =
case lookupMeta "author" meta of
Just (MetaString s) -> [[Str s]]
Just (MetaInlines ils) -> [ils]
Just (MetaList ms) -> [ils | MetaInlines ils <- ms] ++
[ils | MetaBlocks [Plain ils] <- ms] ++
[ils | MetaBlocks [Para ils] <- ms] ++
[[Str x] | MetaString x <- ms]
_ -> []
-- | Extract date from metadata; works just like the old @docDate@.
docDate :: Meta -> [Inline]
docDate meta =
case lookupMeta "date" meta of
Just (MetaString s) -> [Str s]
Just (MetaInlines ils) -> ils
Just (MetaBlocks [Plain ils]) -> ils
Just (MetaBlocks [Para ils]) -> ils
_ -> []
-- | Alignment of a table column.
data Alignment = AlignLeft
| AlignRight
| AlignCenter
| AlignDefault deriving (Eq, Ord, Show, Read, Typeable, Data, Generic)
-- | List attributes.
type ListAttributes = (Int, ListNumberStyle, ListNumberDelim)
-- | Style of list numbers.
data ListNumberStyle = DefaultStyle
| Example
| Decimal
| LowerRoman
| UpperRoman
| LowerAlpha
| UpperAlpha deriving (Eq, Ord, Show, Read, Typeable, Data, Generic)
-- | Delimiter of list numbers.
data ListNumberDelim = DefaultDelim
| Period
| OneParen
| TwoParens deriving (Eq, Ord, Show, Read, Typeable, Data, Generic)
-- | Attributes: identifier, classes, key-value pairs
type Attr = (String, [String], [(String, String)])
nullAttr :: Attr
nullAttr = ("",[],[])
-- | Table cells are list of Blocks
type TableCell = [Block]
-- | Formats for raw blocks
newtype Format = Format String
deriving (Read, Show, Typeable, Data, Generic)
instance IsString Format where
fromString f = Format $ map toLower f
instance Eq Format where
Format x == Format y = map toLower x == map toLower y
instance Ord Format where
compare (Format x) (Format y) = compare (map toLower x) (map toLower y)
-- | Block element.
data Block
= Plain [Inline] -- ^ Plain text, not a paragraph
| Para [Inline] -- ^ Paragraph
| CodeBlock Attr String -- ^ Code block (literal) with attributes
| RawBlock Format String -- ^ Raw block
| BlockQuote [Block] -- ^ Block quote (list of blocks)
| OrderedList ListAttributes [[Block]] -- ^ Ordered list (attributes
-- and a list of items, each a list of blocks)
| BulletList [[Block]] -- ^ Bullet list (list of items, each
-- a list of blocks)
| DefinitionList [([Inline],[[Block]])] -- ^ Definition list
-- Each list item is a pair consisting of a
-- term (a list of inlines) and one or more
-- definitions (each a list of blocks)
| Header Int Attr [Inline] -- ^ Header - level (integer) and text (inlines)
| HorizontalRule -- ^ Horizontal rule
| Table [Inline] [Alignment] [Double] [TableCell] [[TableCell]] -- ^ Table,
-- with caption, column alignments (required),
-- relative column widths (0 = default),
-- column headers (each a list of blocks), and
-- rows (each a list of lists of blocks)
| Div Attr [Block] -- ^ Generic block container with attributes
| Null -- ^ Nothing
deriving (Eq, Ord, Read, Show, Typeable, Data, Generic)
-- | Type of quotation marks to use in Quoted inline.
data QuoteType = SingleQuote | DoubleQuote deriving (Show, Eq, Ord, Read, Typeable, Data, Generic)
-- | Link target (URL, title).
type Target = (String, String)
-- | Type of math element (display or inline).
data MathType = DisplayMath | InlineMath deriving (Show, Eq, Ord, Read, Typeable, Data, Generic)
-- | Inline elements.
data Inline
= Str String -- ^ Text (string)
| Emph [Inline] -- ^ Emphasized text (list of inlines)
| Strong [Inline] -- ^ Strongly emphasized text (list of inlines)
| Strikeout [Inline] -- ^ Strikeout text (list of inlines)
| Superscript [Inline] -- ^ Superscripted text (list of inlines)
| Subscript [Inline] -- ^ Subscripted text (list of inlines)
| SmallCaps [Inline] -- ^ Small caps text (list of inlines)
| Quoted QuoteType [Inline] -- ^ Quoted text (list of inlines)
| Cite [Citation] [Inline] -- ^ Citation (list of inlines)
| Code Attr String -- ^ Inline code (literal)
| Space -- ^ Inter-word space
| SoftBreak -- ^ Soft line break
| LineBreak -- ^ Hard line break
| Math MathType String -- ^ TeX math (literal)
| RawInline Format String -- ^ Raw inline
| Link Attr [Inline] Target -- ^ Hyperlink: alt text (list of inlines), target
| Image Attr [Inline] Target -- ^ Image: alt text (list of inlines), target
| Note [Block] -- ^ Footnote or endnote
| Span Attr [Inline] -- ^ Generic inline container with attributes
deriving (Show, Eq, Ord, Read, Typeable, Data, Generic)
data Citation = Citation { citationId :: String
, citationPrefix :: [Inline]
, citationSuffix :: [Inline]
, citationMode :: CitationMode
, citationNoteNum :: Int
, citationHash :: Int
}
deriving (Show, Eq, Read, Typeable, Data, Generic)
instance Ord Citation where
compare = comparing citationHash
data CitationMode = AuthorInText | SuppressAuthor | NormalCitation
deriving (Show, Eq, Ord, Read, Typeable, Data, Generic)
-- derive generic instances of FromJSON, ToJSON:
jsonOpts :: Aeson.Options
jsonOpts = Aeson.defaultOptions{
Aeson.fieldLabelModifier = id
, Aeson.constructorTagModifier = id
, Aeson.allNullaryToStringTag = False
, Aeson.omitNothingFields = False
, Aeson.sumEncoding = Aeson.TaggedObject "t" "c"
}
toJSON' :: (Generic a, Aeson.GToJSON (Rep a))
=> a -> Aeson.Value
toJSON' = Aeson.genericToJSON jsonOpts
parseJSON' :: (Generic a, Aeson.GFromJSON (Rep a))
=> Aeson.Value -> Aeson.Parser a
parseJSON' = Aeson.genericParseJSON jsonOpts
instance FromJSON MetaValue
where parseJSON = parseJSON'
instance ToJSON MetaValue
where toJSON = toJSON'
instance FromJSON Meta
where parseJSON = parseJSON'
instance ToJSON Meta
where toJSON = toJSON'
instance FromJSON CitationMode
where parseJSON = parseJSON'
instance ToJSON CitationMode
where toJSON = toJSON'
instance FromJSON Citation
where parseJSON = parseJSON'
instance ToJSON Citation
where toJSON = toJSON'
instance FromJSON QuoteType
where parseJSON = parseJSON'
instance ToJSON QuoteType
where toJSON = toJSON'
instance FromJSON MathType
where parseJSON = parseJSON'
instance ToJSON MathType
where toJSON = toJSON'
instance FromJSON ListNumberStyle
where parseJSON = parseJSON'
instance ToJSON ListNumberStyle
where toJSON = toJSON'
instance FromJSON ListNumberDelim
where parseJSON = parseJSON'
instance ToJSON ListNumberDelim
where toJSON = toJSON'
instance FromJSON Alignment
where parseJSON = parseJSON'
instance ToJSON Alignment
where toJSON = toJSON'
instance FromJSON Format
where parseJSON = parseJSON'
instance ToJSON Format
where toJSON = toJSON'
instance FromJSON Inline
where parseJSON = parseJSON'
instance ToJSON Inline
where toJSON = toJSON'
instance FromJSON Block
where parseJSON = parseJSON'
instance ToJSON Block
where toJSON = toJSON'
instance FromJSON Pandoc
where parseJSON = parseJSON'
instance ToJSON Pandoc
where toJSON = toJSON'
-- Instances for deepseq
#if MIN_VERSION_base(4,8,0)
instance NFData MetaValue
instance NFData Meta
instance NFData Citation
instance NFData Alignment
instance NFData Inline
instance NFData MathType
instance NFData Format
instance NFData CitationMode
instance NFData QuoteType
instance NFData ListNumberDelim
instance NFData ListNumberStyle
instance NFData Block
instance NFData Pandoc
#else
instance NFData MetaValue where rnf = genericRnf
instance NFData Meta where rnf = genericRnf
instance NFData Citation where rnf = genericRnf
instance NFData Alignment where rnf = genericRnf
instance NFData Inline where rnf = genericRnf
instance NFData MathType where rnf = genericRnf
instance NFData Format where rnf = genericRnf
instance NFData CitationMode where rnf = genericRnf
instance NFData QuoteType where rnf = genericRnf
instance NFData ListNumberDelim where rnf = genericRnf
instance NFData ListNumberStyle where rnf = genericRnf
instance NFData Block where rnf = genericRnf
instance NFData Pandoc where rnf = genericRnf
#endif
pandocTypesVersion :: Version
pandocTypesVersion = version
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