Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.Text.Markup

Description

This module provides an API for "marking up" text with arbitrary values. A piece of markup can then be converted to a list of pairs representing the sequences of characters assigned the same markup value.

This interface is experimental. Don't use this for your full-file syntax highlighter just yet!

Synopsis

data Markup a
markupToList :: Eq a => Markup a -> [[(Text, a)]]
markupSet :: Eq a => (Int, Int) -> a -> Markup a -> Markup a
fromList :: [(Text, a)] -> Markup a
fromText :: Monoid a => Text -> Markup a
toText :: Eq a => Markup a -> Text
isEmpty :: Markup a -> Bool
(@@) :: Text -> a -> Markup a

Documentation

data Markup a Source #

Markup with metadata type a assigned to each character.

Instances

Instances details

Show a => Show (Markup a) Source #
Instance details Defined in Data.Text.Markup Methods showsPrec :: Int -> Markup a -> ShowS # show :: Markup a -> String # showList :: [Markup a] -> ShowS #
Monoid a => IsString (Markup a) Source #
Instance details Defined in Data.Text.Markup Methods fromString :: String -> Markup a #
Semigroup (Markup a) Source #
Instance details Defined in Data.Text.Markup Methods (<>) :: Markup a -> Markup a -> Markup a # sconcat :: NonEmpty (Markup a) -> Markup a # stimes :: Integral b => b -> Markup a -> Markup a #
Monoid (Markup a) Source #
Instance details Defined in Data.Text.Markup Methods mempty :: Markup a # mappend :: Markup a -> Markup a -> Markup a # mconcat :: [Markup a] -> Markup a #

markupToList :: Eq a => Markup a -> [[(Text, a)]] Source #

Convert markup to a list of lines. Each line is represented by a list of pairs in which each pair contains the longest subsequence of characters having the same metadata.

markupSet :: Eq a => (Int, Int) -> a -> Markup a -> Markup a Source #

Set the metadata for a range of character positions in a piece of markup. This is useful for, e.g., syntax highlighting.

fromList :: [(Text, a)] -> Markup a Source #

Convert a list of text and metadata pairs into markup.

fromText :: Monoid a => Text -> Markup a Source #

Build markup from text with the default metadata.

toText :: Eq a => Markup a -> Text Source #

Extract the text from markup, discarding the markup metadata.

isEmpty :: Markup a -> Bool Source #

Test whether the markup is empty.

(@@) :: Text -> a -> Markup a Source #

Build a piece of markup; assign the specified metadata to every character in the specified text.