Text.Pandoc.Class

This module defines a type class, PandocMonad, for pandoc readers and writers. A pure instance PandocPure and an impure instance PandocIO are provided. This allows users of the library to choose whether they want conversions to perform IO operations (such as reading include files or images).

Documentation

class (Functor m, Applicative m, Monad m, MonadError PandocError m) => PandocMonad m where

The PandocMonad typeclass contains all the potentially IO-related functions used in pandoc's readers and writers. Instances of this typeclass may implement these functions in IO (as in PandocIO) or using an internal state that represents a file system, time, and so on (as in PandocPure).

Minimal complete definition

lookupEnv, getCurrentTime, getCurrentTimeZone, newStdGen, newUniqueHash, openURL, readFileLazy, readFileStrict, glob, fileExists, getDataFileName, getModificationTime, getCommonState, putCommonState, logOutput

Methods

lookupEnv :: String -> m (Maybe String)

Lookup an environment variable.

getCurrentTime :: m UTCTime

Get the current (UTC) time.

getCurrentTimeZone :: m TimeZone

Get the locale's time zone.

newStdGen :: m StdGen

Return a new generator for random numbers.

newUniqueHash :: m Int

Return a new unique integer.

openURL :: String -> m (ByteString, Maybe MimeType)

Retrieve contents and mime type from a URL, raising an error on failure.

readFileLazy :: FilePath -> m ByteString

Read the lazy ByteString contents from a file path, raising an error on failure.

readFileStrict :: FilePath -> m ByteString

Read the strict ByteString contents from a file path, raising an error on failure.

glob :: String -> m [FilePath]

Return a list of paths that match a glob, relative to the working directory. See Glob for the glob syntax.

fileExists :: FilePath -> m Bool

Returns True if file exists.

getDataFileName :: FilePath -> m FilePath

Returns the path of data file.

getModificationTime :: FilePath -> m UTCTime

Return the modification time of a file.

getCommonState :: m CommonState

Get the value of the CommonState used by all instances of PandocMonad.

putCommonState :: CommonState -> m ()

Set the value of the CommonState used by all instances of PandocMonad. | Get the value of a specific field of CommonState.

getsCommonState :: (CommonState -> a) -> m a

Get the value of a specific field of CommonState.

modifyCommonState :: (CommonState -> CommonState) -> m ()

Modify the CommonState.

logOutput :: LogMessage -> m ()

trace :: String -> m ()

Instances

PandocMonad PandocPure

Methods

lookupEnv :: String -> PandocPure (Maybe String)

getCurrentTime :: PandocPure UTCTime

getCurrentTimeZone :: PandocPure TimeZone

newStdGen :: PandocPure StdGen

newUniqueHash :: PandocPure Int

openURL :: String -> PandocPure (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> PandocPure ByteString

readFileStrict :: FilePath -> PandocPure ByteString

glob :: String -> PandocPure [FilePath]

fileExists :: FilePath -> PandocPure Bool

getDataFileName :: FilePath -> PandocPure FilePath

getModificationTime :: FilePath -> PandocPure UTCTime

getCommonState :: PandocPure CommonState

putCommonState :: CommonState -> PandocPure ()

getsCommonState :: (CommonState -> a) -> PandocPure a

modifyCommonState :: (CommonState -> CommonState) -> PandocPure ()

logOutput :: LogMessage -> PandocPure ()

trace :: String -> PandocPure ()

PandocMonad PandocIO

Methods

lookupEnv :: String -> PandocIO (Maybe String)

getCurrentTime :: PandocIO UTCTime

getCurrentTimeZone :: PandocIO TimeZone

newStdGen :: PandocIO StdGen

newUniqueHash :: PandocIO Int

openURL :: String -> PandocIO (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> PandocIO ByteString

readFileStrict :: FilePath -> PandocIO ByteString

glob :: String -> PandocIO [FilePath]

fileExists :: FilePath -> PandocIO Bool

getDataFileName :: FilePath -> PandocIO FilePath

getModificationTime :: FilePath -> PandocIO UTCTime

getCommonState :: PandocIO CommonState

putCommonState :: CommonState -> PandocIO ()

getsCommonState :: (CommonState -> a) -> PandocIO a

modifyCommonState :: (CommonState -> CommonState) -> PandocIO ()

logOutput :: LogMessage -> PandocIO ()

trace :: String -> PandocIO ()

(MonadTrans t, PandocMonad m, Functor (t m), MonadError PandocError (t m), Monad (t m), Applicative (t m)) => PandocMonad (t m)

Methods

lookupEnv :: String -> t m (Maybe String)

getCurrentTime :: t m UTCTime

getCurrentTimeZone :: t m TimeZone

newStdGen :: t m StdGen

newUniqueHash :: t m Int

openURL :: String -> t m (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> t m ByteString

readFileStrict :: FilePath -> t m ByteString

glob :: String -> t m [FilePath]

fileExists :: FilePath -> t m Bool

getDataFileName :: FilePath -> t m FilePath

getModificationTime :: FilePath -> t m UTCTime

getCommonState :: t m CommonState

putCommonState :: CommonState -> t m ()

getsCommonState :: (CommonState -> a) -> t m a

modifyCommonState :: (CommonState -> CommonState) -> t m ()

logOutput :: LogMessage -> t m ()

trace :: String -> t m ()

PandocMonad m => PandocMonad (ParsecT s st m)

Methods

lookupEnv :: String -> ParsecT s st m (Maybe String)

getCurrentTime :: ParsecT s st m UTCTime

getCurrentTimeZone :: ParsecT s st m TimeZone

newStdGen :: ParsecT s st m StdGen

newUniqueHash :: ParsecT s st m Int

openURL :: String -> ParsecT s st m (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> ParsecT s st m ByteString

readFileStrict :: FilePath -> ParsecT s st m ByteString

glob :: String -> ParsecT s st m [FilePath]

fileExists :: FilePath -> ParsecT s st m Bool

getDataFileName :: FilePath -> ParsecT s st m FilePath

getModificationTime :: FilePath -> ParsecT s st m UTCTime

getCommonState :: ParsecT s st m CommonState

putCommonState :: CommonState -> ParsecT s st m ()

getsCommonState :: (CommonState -> a) -> ParsecT s st m a

modifyCommonState :: (CommonState -> CommonState) -> ParsecT s st m ()

logOutput :: LogMessage -> ParsecT s st m ()

trace :: String -> ParsecT s st m ()

data CommonState

CommonState represents state that is used by all instances of PandocMonad. Normally users should not need to interact with it directly; instead, auxiliary functions like setVerbosity and withMediaBag should be used.

Constructors

CommonState

Fields

• stLog :: [LogMessage]

  A list of log messages in reverse order

• stUserDataDir :: Maybe FilePath

  Directory to search for data files

• stSourceURL :: Maybe String

  Absolute URL + dir of 1st source file

• stRequestHeaders :: [(String, String)]

  Headers to add for HTTP requests

• stMediaBag :: MediaBag

  Media parsed from binary containers

• stTranslations :: Maybe (Lang, Maybe Translations)

  Translations for localization

• stInputFiles :: [FilePath]

  List of input files from command line

• stOutputFile :: Maybe FilePath

  Output file from command line

• stResourcePath :: [FilePath]

  Path to search for resources like included images

• stVerbosity :: Verbosity

  Verbosity level

• stTrace :: Bool

  Controls whether tracing messages are issued.

Instances

Default CommonState

Methods

def :: CommonState

data PureState

The PureState contains ersatz representations of things that would normally be obtained through IO.

Constructors

PureState

Fields

• stStdGen :: StdGen
• stWord8Store :: [Word8]
• stUniqStore :: [Int]
• stEnv :: [(String, String)]
• stTime :: UTCTime
• stTimeZone :: TimeZone
• stReferenceDocx :: Archive
• stReferenceODT :: Archive
• stFiles :: FileTree
• stUserDataFiles :: FileTree
• stCabalDataFiles :: FileTree

Instances

Default PureState

Methods

def :: PureState

getPureState :: PandocPure PureState

getsPureState :: (PureState -> a) -> PandocPure a

putPureState :: PureState -> PandocPure ()

modifyPureState :: (PureState -> PureState) -> PandocPure ()

getPOSIXTime :: PandocMonad m => m POSIXTime

getZonedTime :: PandocMonad m => m ZonedTime

readFileFromDirs :: PandocMonad m => [FilePath] -> FilePath -> m (Maybe String)

Read file, checking in any number of directories.

report :: PandocMonad m => LogMessage -> m ()

Log a message using logOutput. Note that logOutput is called only if the verbosity level exceeds the level of the message, but the message is added to the list of log messages that will be retrieved by getLog regardless of its verbosity level.

setTrace :: PandocMonad m => Bool -> m ()

Determine whether tracing is enabled. This affects the behavior of trace. If tracing is not enabled, trace does nothing.

setRequestHeader

Arguments

:: PandocMonad m

=> String

Header name

-> String

Value

-> m ()

Set request header to use in HTTP requests.

getLog :: PandocMonad m => m [LogMessage]

setVerbosity :: PandocMonad m => Verbosity -> m ()

Set the verbosity level.

getVerbosity :: PandocMonad m => m Verbosity

Get the verbosity level.

getMediaBag :: PandocMonad m => m MediaBag

setMediaBag :: PandocMonad m => MediaBag -> m ()

Initialize the media bag.

insertMedia :: PandocMonad m => FilePath -> Maybe MimeType -> ByteString -> m ()

setUserDataDir :: PandocMonad m => Maybe FilePath -> m ()

Set the user data directory in common state.

getUserDataDir :: PandocMonad m => m (Maybe FilePath)

Get the user data directory from common state.

fetchItem :: PandocMonad m => String -> m (ByteString, Maybe MimeType)

Fetch an image or other item from the local filesystem or the net. Returns raw content and maybe mime type.

getInputFiles :: PandocMonad m => m [FilePath]

setInputFiles :: PandocMonad m => [FilePath] -> m ()

getOutputFile :: PandocMonad m => m (Maybe FilePath)

setOutputFile :: PandocMonad m => Maybe FilePath -> m ()

setResourcePath :: PandocMonad m => [FilePath] -> m ()

getResourcePath :: PandocMonad m => m [FilePath]

newtype PandocIO a

Constructors

PandocIO

Fields

• unPandocIO :: ExceptT PandocError (StateT CommonState IO) a

Instances

Monad PandocIO

Methods

(>>=) :: PandocIO a -> (a -> PandocIO b) -> PandocIO b

(>>) :: PandocIO a -> PandocIO b -> PandocIO b

return :: a -> PandocIO a

fail :: String -> PandocIO a

Functor PandocIO

Methods

fmap :: (a -> b) -> PandocIO a -> PandocIO b

(<$) :: a -> PandocIO b -> PandocIO a

Applicative PandocIO

Methods

pure :: a -> PandocIO a

(<*>) :: PandocIO (a -> b) -> PandocIO a -> PandocIO b

(*>) :: PandocIO a -> PandocIO b -> PandocIO b

(<*) :: PandocIO a -> PandocIO b -> PandocIO a

MonadIO PandocIO

Methods

liftIO :: IO a -> PandocIO a

PandocMonad PandocIO

Methods

lookupEnv :: String -> PandocIO (Maybe String)

getCurrentTime :: PandocIO UTCTime

getCurrentTimeZone :: PandocIO TimeZone

newStdGen :: PandocIO StdGen

newUniqueHash :: PandocIO Int

openURL :: String -> PandocIO (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> PandocIO ByteString

readFileStrict :: FilePath -> PandocIO ByteString

glob :: String -> PandocIO [FilePath]

fileExists :: FilePath -> PandocIO Bool

getDataFileName :: FilePath -> PandocIO FilePath

getModificationTime :: FilePath -> PandocIO UTCTime

getCommonState :: PandocIO CommonState

putCommonState :: CommonState -> PandocIO ()

getsCommonState :: (CommonState -> a) -> PandocIO a

modifyCommonState :: (CommonState -> CommonState) -> PandocIO ()

logOutput :: LogMessage -> PandocIO ()

trace :: String -> PandocIO ()

MonadError PandocError PandocIO

Methods

throwError :: PandocError -> PandocIO a

catchError :: PandocIO a -> (PandocError -> PandocIO a) -> PandocIO a

newtype PandocPure a

Constructors

PandocPure

Fields

• unPandocPure :: ExceptT PandocError (StateT CommonState (State PureState)) a

Instances

Monad PandocPure

Methods

(>>=) :: PandocPure a -> (a -> PandocPure b) -> PandocPure b

(>>) :: PandocPure a -> PandocPure b -> PandocPure b

return :: a -> PandocPure a

fail :: String -> PandocPure a

Functor PandocPure

Methods

fmap :: (a -> b) -> PandocPure a -> PandocPure b

(<$) :: a -> PandocPure b -> PandocPure a

Applicative PandocPure

Methods

pure :: a -> PandocPure a

(<*>) :: PandocPure (a -> b) -> PandocPure a -> PandocPure b

(*>) :: PandocPure a -> PandocPure b -> PandocPure b

(<*) :: PandocPure a -> PandocPure b -> PandocPure a

PandocMonad PandocPure

Methods

lookupEnv :: String -> PandocPure (Maybe String)

getCurrentTime :: PandocPure UTCTime

getCurrentTimeZone :: PandocPure TimeZone

newStdGen :: PandocPure StdGen

newUniqueHash :: PandocPure Int

openURL :: String -> PandocPure (ByteString, Maybe MimeType)

readFileLazy :: FilePath -> PandocPure ByteString

readFileStrict :: FilePath -> PandocPure ByteString

glob :: String -> PandocPure [FilePath]

fileExists :: FilePath -> PandocPure Bool

getDataFileName :: FilePath -> PandocPure FilePath

getModificationTime :: FilePath -> PandocPure UTCTime

getCommonState :: PandocPure CommonState

putCommonState :: CommonState -> PandocPure ()

getsCommonState :: (CommonState -> a) -> PandocPure a

modifyCommonState :: (CommonState -> CommonState) -> PandocPure ()

logOutput :: LogMessage -> PandocPure ()

trace :: String -> PandocPure ()

MonadError PandocError PandocPure

Methods

throwError :: PandocError -> PandocPure a

catchError :: PandocPure a -> (PandocError -> PandocPure a) -> PandocPure a

newtype FileTree

Constructors

FileTree

Fields

• unFileTree :: Map FilePath FileInfo

Instances

Monoid FileTree

Methods

mempty :: FileTree

mappend :: FileTree -> FileTree -> FileTree

mconcat :: [FileTree] -> FileTree

data FileInfo

Constructors

FileInfo

Fields

• infoFileMTime :: UTCTime
• infoFileContents :: ByteString

addToFileTree :: FileTree -> FilePath -> IO FileTree

Add the specified file to the FileTree. If file is a directory, add its contents recursively.

runIO :: PandocIO a -> IO (Either PandocError a)

Evaluate a PandocIO operation.

runIOorExplode :: PandocIO a -> IO a

Evaluate a PandocIO operation, handling any errors by exiting with an appropriate message and error status.

runPure :: PandocPure a -> Either PandocError a

readDefaultDataFile :: PandocMonad m => FilePath -> m ByteString

Read file from from Cabal data directory.

readDataFile :: PandocMonad m => FilePath -> m ByteString

Read file from user data directory or, if not found there, from Cabal data directory.

fetchMediaResource :: PandocMonad m => String -> m (FilePath, Maybe MimeType, ByteString)

Fetch local or remote resource (like an image) and provide data suitable for adding it to the MediaBag.

fillMediaBag :: PandocMonad m => Pandoc -> m Pandoc

Traverse tree, filling media bag for any images that aren't already in the media bag.

extractMedia :: FilePath -> Pandoc -> PandocIO Pandoc

Extract media from the mediabag into a directory.

toLang :: PandocMonad m => Maybe String -> m (Maybe Lang)

Convert BCP47 string to a Lang, issuing warning if there are problems.

setTranslations :: PandocMonad m => Lang -> m ()

Select the language to use with translateTerm. Note that this does not read a translation file; that is only done the first time translateTerm is used.

translateTerm :: PandocMonad m => Term -> m String

Get a translation from the current term map. Issue a warning if the term is not defined.

data Translations

Instances

Show Translations

Methods

showsPrec :: Int -> Translations -> ShowS

show :: Translations -> String

showList :: [Translations] -> ShowS

Generic Translations

Associated Types

type Rep Translations :: * -> *

Methods

from :: Translations -> Rep Translations x

to :: Rep Translations x -> Translations

Monoid Translations

Methods

mempty :: Translations

mappend :: Translations -> Translations -> Translations

mconcat :: [Translations] -> Translations

FromJSON Translations

Methods

parseJSON :: Value -> Parser Translations

parseJSONList :: Value -> Parser [Translations]

type Rep Translations

type Rep Translations