Maintainer	[email protected]
Stability	experimental
Portability	POSIX
Safe Haskell	Safe
Language	Haskell2010

Data.Char.Control

Contents

Conversion to control pictures
Conversion from control picturesa
Check if a Char is a control Char
Alternative characters

Description

Unicode has a block named Control Pictures that visualizes control characters such as NULL, SUB, LF, DEL, etc. This module aims to make it more convenient to convert the control characters to their visualization and vice versa. Only ASCII control characters and the space are supported.

Synopsis

controlPicture :: Char -> Maybe Char
controlPicture' :: Char -> Char
convertToControlPictures :: Text -> Text
fromControlPicture :: Char -> Maybe Char
fromControlPicture' :: Char -> Char
isAsciiControl :: Char -> Bool
isControl :: Char -> Bool
hasControlVisualization :: Char -> Bool
blankSymbol :: Char
openBox :: Char
newLine :: Char
alternativeDelete :: Char
alternativeSubstitute :: Char

Conversion to control pictures

controlPicture Source #

Arguments

:: Char	The given control `Char` to convert.
-> Maybe Char

Convert the given control Char to a Char that visualizes that characters. This is sometimes done by diagonal lettering of the characters denoting the control character. If the given Char is not a control character, Nothing is returned.

controlPicture' Source #

Arguments

:: Char	The given control `Char`.
-> Char	The corresponding `Char` that visualizes the control `Char`.

Convert the given control Char to a Char that visualizes that character. If the given Char is not a control character, it is unspecified what happens.

convertToControlPictures Source #

Arguments

:: Text	The given `Text` where we want to convert control characters to their control picture characters.
-> Text	The corresponding `Text` where the control characters are converted to their control picture characters.

Convert the given Text to a Text object where the control characters that have in Unicode a control picture block item.

Conversion from control picturesa

fromControlPicture Source #

Arguments

:: Char	The given visualization of control `Char`.
-> Maybe Char	The corresponding control `Char` wrapped in a `Just` if the given character is the visualization of a control character; otherwise `Nothing`.

Convert the given visualization of a control Char to that control Char wrapped in a Just. If the given Char is not a visualization of a control character, Nothing is returned.

fromControlPicture' Source #

Arguments

:: Char	The given visualization of control `Char`.
-> Char	The corresponding control `Char`.

Convert the given visualization of a control Char to that control Char. If the given Char is not a visualization of a control character, it is unspecified what happens.

Check if a `Char` is a control `Char`

isAsciiControl Source #

Arguments

:: Char	The given `Char` to check.
-> Bool	`True` if the given `Char` is a control character in the ASCII range; otherwise `False`.

Check if the given Char is a control character in the ASCII range.

isControl :: Char -> Bool #

Selects control characters, which are the non-printing characters of the Latin-1 subset of Unicode.

hasControlVisualization Source #

Arguments

:: Char	The given `Char` to check.
-> Bool	`True` if the given control character can be visualized; `False` otherwise.

Check if for the given Char there is a visualization.

Alternative characters

blankSymbol Source #

Arguments

:: Char

Another character for space.

Another symbol used to denote a space that works with ␢. The controlPicture function uses ␠.

openBox Source #

Arguments

:: Char

Another character for space.

Another symbol used to denote a space that works with ␣. The controlPicture function uses ␠.

newLine Source #

Arguments

:: Char

Another character for a new line.

Another symbol used to denote a new line that works with ␤. The control picture function uses ␊.

alternativeDelete Source #

Arguments

:: Char

Another character for delete.

Another symbol used to denote a delete character that works with ␥. The control picture function uses ␡.

alternativeSubstitute Source #

Arguments

:: Char

Another character for substitute.

Another symbol used to denote a substitute character that works with ␦. The control picture function uses ␚.

Conversion to control pictures

Conversion from control picturesa

Check if a Char is a control Char

Alternative characters

Check if a `Char` is a control `Char`