1String::TtyLength(3)  User Contributed Perl Documentation String::TtyLength(3)
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NAME

6       String::TtyLength - length or width of string excluding ANSI tty codes
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SYNOPSIS

9        use String::TtyLength 0.02 qw/ tty_length tty_width /;
10        $length = tty_length("\e[1mbold text\e[0m");
11        print "length = $length\n";
12        # 9
13
14        $width = tty_width("😄");
15        print "width = $width\n";
16        # 2
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DESCRIPTION

19       This module provides two functions which tell you the length and width
20       of a string as it will appear on a terminal (tty), excluding any ANSI
21       escape codes.
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23       "tty_length" returns the length of a string excluding any ANSI tty /
24       terminal escape codes.
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26       "tty_width" returns the number of columns on a terminal that the string
27       will take up, also excluding any escape codes.
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29       For non-wide characters, the functions will return the same value.  But
30       consider the following:
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32        my $emoji  = "😄";
33        my $length = tty_length($emoji);   # 1
34        my $width  = tty_width($emoji);    # 2
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36       If you're trying to align text in columns, then you'll probably want
37       "tty_width"; if you just want to know the number of characters, using
38       "tty_length".
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40   tty_length( STRING )
41       Takes a single string, and returns the length of the string, excluding
42       any escape sequences.
43
44       Note: the escape sequences could include cursor movement, so the length
45       returned by this function might not be the number of characters that
46       would be visible on screen.  But
47       "length_of_string_excluding_escape_sequences()" was just too long.
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49   tty_width( STRING )
50       Takes a single string and returns the number of columns that the string
51       will take up on a terminal.
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53       You may find that sometimes "tty_width()" returns the wrong number.  If
54       you do, please submit a bug, or email me at the address below.
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56       This was added in version 0.02 of "String::TtyLength", so you should
57       require at least that version of this module, as per the SYNOPSIS.
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SEE ALSO

60       "colorstrip()" in Term::ANSIColor will remove ANSI color escape
61       sequences from a string, but not all ANSI escape sequences.
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REPOSITORY

64       <https://github.com/neilb/String-TtyLength>
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AUTHOR

67       Neil Bowers <neilb@cpan.org>
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70       This software is copyright (c) 2020 by Neil Bowers.
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72       This is free software; you can redistribute it and/or modify it under
73       the same terms as the Perl 5 programming language system itself.
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77perl v5.36.0                      2022-07-22              String::TtyLength(3)
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