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use 5.008001; use strict; use warnings; use utf8; |
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package Lingua::EN::Titlecase::Simple; |
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our $VERSION = '1.004'; |
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our @SMALL_WORD |
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= qw/ (?
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my $apos = q/ (?: ['’] [[:lower:]]* )? /; |
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sub titlecase { |
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my @str = @_ or return; |
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for ( @str ) { |
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s{\A\s+}{}, s{\s+\z}{}; |
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$_ = lc $_ unless /[[:lower:]]/; |
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s{ |
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\b (_*) (?: |
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( (?<=[ ][/\\]) [[:alpha:]]+ [-_[:alpha:]/\\]+ | # file path or |
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[-_[:alpha:]]+ [@.:] [-_[:alpha:]@.:/]+ $apos | # URL, domain, or email or |
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[0-9] [0-9,._ ]+ $apos ) # a numeric literal |
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( (?i) ${\join '|', @SMALL_WORD} $apos ) # or small word (case-insensitive) |
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( [[:alpha:]] [[:lower:]'’()\[\]{}]* $apos ) # or word w/o internal caps |
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( [[:alpha:]] [[:alpha:]'’()\[\]{}]* $apos ) # or some other word |
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) (?= _* \b ) |
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}{ |
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$1 . |
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( defined $2 ? $2 # preserve URL, domain, or email |
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: defined $3 ? lc $3 # lowercase small word |
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: defined $4 ? ucfirst $4 # capitalize lower-case word |
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: $5 ) # preserve other kinds of word |
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}exgo; |
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# exceptions for small words: capitalize at start and end of title |
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s{ |
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( \A [[:punct:]]* # start of title... |
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| [:.;?!][ ]+ # or of subsentence... |
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| [ ]['"“‘(\[][ ]* ) # or of inserted subphrase... |
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( ${\join '|', @SMALL_WORD} ) \b # ... followed by small word |
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}{$1\u\L$2}xigo; |
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s{ |
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\b ( ${\join '|', @SMALL_WORD} ) # small word... |
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(?= [[:punct:]]* \Z # ... at the end of the title... |
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| ['"’”)\]] [ ] ) # ... or of an inserted subphrase? |
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}{\u\L$1}xigo; |
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} |
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wantarray ? @str : ( @str > 1 ) ? \@str : $str[0]; |
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} |
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sub import { |
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my ( $class, $pkg, $file, $line ) = ( shift, caller ); |
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die "Unknown symbol: $_ at $file line $line.\n" for grep 'titlecase' ne $_, @_; |
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no strict 'refs'; |
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*{ $pkg . '::titlecase' } = \&titlecase if @_; |
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} |
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1; |
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__END__ |