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95603
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use strict; |
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use warnings; |
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use utf8; |
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package Unicode::Subscript; |
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#ABSTRACT: Generate subscripted and superscripted UTF-8 text without markup |
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use Carp; |
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BEGIN { |
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use Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw(subscript superscript TM SM); |
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our %EXPORT_TAGS = (all => \@EXPORT_OK); |
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} |
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my $TM = '™'; |
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my $SM = '℠'; |
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sub subscript { |
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my $text = shift; |
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croak "text is undefined" if !defined $text; |
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croak "too many arguments" if @_; |
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$text =~ tr/0-9+\-=()/₀₁₂₃₄₅₆₇₈₉₊₋₌₍₎/; |
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$text =~ tr/aehiklmnoprstuvx/ₐₑₕᵢₖₗₘₙₒₚᵣₛₜᵤᵥₓ/; |
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return $text; |
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} |
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sub superscript { |
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my $text = shift; |
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croak "text is undefined" if !defined $text; |
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croak "too many arguments" if @_; |
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$text =~ tr/0-9+\-=()/⁰¹²³⁴⁵⁶⁷⁸⁹⁺⁻⁼⁽⁾/; |
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$text =~ tr/a-pr-z/ᵃᵇᶜᵈᵉᶠᵍʰⁱʲᵏˡᵐⁿᵒᵖʳˢᵗᵘᵛʷˣʸᶻ/; |
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$text =~ tr/ABDEGHIJKLMNOPRTUVW/ᴬᴮᴰᴱᴳᴴᴵᴶᴷᴸᴹᴺᴼᴾᴿᵀᵁⱽᵂ/; |
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return $text; |
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} |
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sub TM { |
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return $TM; |
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} |
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sub SM { |
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return $SM; |
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} |
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1; |
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=pod |
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=encoding utf-8 |
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=head1 NAME |
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Unicode::Subscript - Generate subscripted and superscripted UTF-8 text without markup |
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=head1 SYNOPSIS |
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use Unicode::Subscript qw(subscript superscript); |
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say 'H' . subscript(2) . 'O'; # H₂O |
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say 'This algorithm is O(n' . superscript(3) . ')'; # O(n³) |
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say superscript('this text is really high!'); # ᵗʰⁱˢ ᵗᵉˣᵗ ⁱˢ ʳᵉᵃˡˡʸ ʰⁱᵍʰ! |
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use Unicode::Subscript qw(SM TM); |
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say 'Eat at Subway' . TM(); # Eat at Subway™ |
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use Unicode::Subscript ':all'; # import everything |
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=head1 DESCRIPTION |
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This module provides methods to convert characters to the equivalent UTF-8 |
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characters for their subscripted or superscripted forms. This may come in |
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handy when generating fractions, chemical formulas, footnotes, etc. |
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=head1 FUNCTIONS |
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=head2 subscript ($text) |
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Return the subscripted version of C<$text>, in UTF-8 encoding. The following |
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characters has subscripted forms in Unicode: |
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=over 4 |
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=item * |
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Digits 0-9, +, -, = and () |
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=item * |
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A small number of lowercase letters: a e h i k l m n o p r s t u v x |
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=back |
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Any other input characters will be left un-suscripted. |
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=head2 superscript ($text) |
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Return the superscripted version of C<$text>, in UTF-8 encoding. The following |
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characters have superscripted forms in Unicode: |
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=over 4 |
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=item * |
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Digits 0-9, +, -, = and () |
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=item * |
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All of the lowercase letters except q |
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=item * |
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A small number of uppercase letters: A B D E G H I J K L M N O P R T U V W |
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=back |
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Any other input characters will be left un-superscripted. |
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=head2 TM |
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Returns the Unicode (TM) superscript character. |
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=head2 SM |
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Returns the Unicode (SM) superscript character. |
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=head1 SEE ALSO |
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L |
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=head1 AUTHOR |
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Richard Harris |
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=head1 COPYRIGHT AND LICENSE |
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This software is copyright (c) 2012 by Richard Harris. |
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=cut |
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__END__ |