Measure units defined in LaTeX. Use CustomMeasure to use commands like textwidth. For instance:

rule Nothing (CustomMeasure linewidth) (Pt 2)

This will create a black box (see rule) as wide as the text and two points tall.

Different types of syntax for mathematical expressions.

Type of LaTeX blocks.

An argument for a LaTeX command or environment.

An infix synonym for mappend.

Since: 4.5.0.0

Escape LaTeX reserved characters in a String.

Escape LaTeX reserved characters in a Text.

Traverse a LaTeX syntax tree and returns the commands (see TeXComm and TeXCommS) that matches the condition and their arguments in each call.

Look into a LaTeX syntax tree to find any call to the command with the given name. It returns a list of arguments with which this command is called.

lookForCommand = (fmap snd .) . matchCommand . (==)

If the returned list is empty, the command was not found. However, if the list contains empty lists, those are callings to the command with no arguments.

For example

lookForCommand "author" l

would look for the argument passed to the \author command in l.

Traverse a LaTeX syntax tree and returns the environments (see TeXEnv) that matches the condition, their arguments and their content in each call.

Similar to lookForCommand, but applied to environments. It returns a list with arguments passed and content of the environment in each call.

lookForEnv = (fmap (\(_,as,l) -> (as,l)) .) . matchEnv . (==)

The function texmap looks for subexpressions that match a given condition and applies a function to them.

texmap c f = runIdentity . texmapM c (pure . f)

Version of texmap where the function returns values in a Monad.

Extract the content of the document environment, if present.

Extract the preamble of a LaTeX document (everything before the document environment). It could be empty.