NAME¶

textutil::wcswidth - Procedures to compute terminal width of strings

SYNOPSIS¶

package require Tcl 8.5 9

package require textutil::wcswidth ?35.3?

::textutil::wcswidth string

::textutil::wcswidth_char char

::textutil::wcswidth_type char

DESCRIPTION¶

The package textutil::wcswidth provides commands that determine character type and width when used in terminals, and the length of strings when printed in a terminal.

The data underlying the functionality of this package is provided by the Unicode database file http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt.

The complete set of procedures is described below.

::textutil::wcswidth string

Returns the number of character cells taken by the string when printed to the terminal. This takes double-wide characters from the various Asian and other scripts into account.

::textutil::wcswidth_char char

Returns the number of character cells taken by the character when printed to the terminal.

Beware: The character char is specified as Unicode codepoint.

::textutil::wcswidth_type char

Returns the character type of the specified character. This a single character in the set of A, F, H, N, Na, and W, as specified per http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt

Beware: The character char is specified as Unicode codepoint.

BUGS, IDEAS, FEEDBACK¶

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category textutil of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist]. Please also report any ideas for enhancements you may have for either package and/or documentation.

When proposing code changes, please provide unified diffs, i.e the output of diff -u.

Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.

SEE ALSO¶

regexp(3tcl), split(3tcl), string(3tcl)

KEYWORDS¶

character type, character width, double-wide character, prefix, regular expression, string

CATEGORY¶

Text processing