Network.Email.Header.Layout

A layout that keeps track of line positions.

Documentation

data Layout a

An abstract type representing a lazy layout.

Instances

Monoid (Layout a)

Methods

mempty :: Layout a

mappend :: Layout a -> Layout a -> Layout a

mconcat :: [Layout a] -> Layout a

layout :: Monoid a => Int -> Layout a -> a

Run a layout with an initial position.

span :: Monoid a => Int -> a -> Layout a

Layout an element of a given length.

break :: Int -> Layout a

Layout a new line and set the initial position.

position :: (Int -> Layout a) -> Layout a

Use the current line position to produce a layout.

nicest :: Int -> Layout a -> Layout a -> Layout a

Choose the first layout if the first line fits within the given length, and the second otherwise.