Data.Text.Markup

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!

Documentation

data Markup a

Markup with metadata type a assigned to each character.

Instances

Show a => Show (Markup a)

Default a => IsString (Markup a)

Monoid (Markup a)

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

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

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

Convert a list of text and metadata pairs into markup.

fromText :: Default a => Text -> Markup a

Build markup from text with the default metadata.

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

Extract the text from markup, discarding the markup metadata.

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

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