Graphics.Text.Width

This module provides functions to measure the terminal column width of characters and strings.

The functions provided in this module all ultimately make calls to the C implementation in cbits/mk_wcwidth.c. That code manages some global state that carries a table of Unicode character widths. For more details, see Install, the C code, and the "Multi-Column Character Support" section of the project README.

Documentation

wcwidth :: Char -> Int

wcswidth :: String -> Int

wctwidth :: Text -> Int

wctlwidth :: Text -> Int

safeWcwidth :: Char -> Int

Returns the display width of a character. Assumes all characters with unknown widths are 0 width.

safeWcswidth :: String -> Int

Returns the display width of a string. Assumes all characters with unknown widths are 0 width.

safeWctwidth :: Text -> Int

Returns the display width of a text. Assumes all characters with unknown widths are 0 width.

safeWctlwidth :: Text -> Int

Returns the display width of a lazy text. Assumes all characters with unknown widths are 0 width.