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 ###################################################################################################  | 
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 # Copyright 2013/2014 by Marcel Greter  | 
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 # This file is part of OCBNET-CSS3 (GPL3)  | 
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 ####################################################################################################  | 
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 package OCBNET::CSS3::Regex::Numbers;  | 
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 ####################################################################################################  | 
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 our $VERSION = '0.2.5';  | 
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 ####################################################################################################  | 
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 use strict;  | 
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 use warnings;  | 
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 # load exporter and inherit from it  | 
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 BEGIN { use Exporter qw(); our @ISA = qw(Exporter); }  | 
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 # define our functions that will be exported  | 
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 BEGIN { our @EXPORT = qw($re_number $re_percent $re_size $re_length $re_byte fromPx toPx); }  | 
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 ####################################################################################################  | 
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 # base regular expressions  | 
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 ####################################################################################################  | 
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 # match (floating point) numbers  | 
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 #**************************************************************************************************  | 
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 our $re_number = qr/[\-\+]?[0-9]*\.?[0-9]+/s;  | 
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 # our $re_number_neg = qr/\-[0-9]*\.?[0-9]+/s;  | 
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 # our $re_number_pos = qr/\+?[0-9]*\.?[0-9]+/s;  | 
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 # regular expression to match a percent property  | 
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 #**************************************************************************************************  | 
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 our $re_percent = qr/$re_number(?:\%)/i;  | 
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 # regular expression to match a size property  | 
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 #**************************************************************************************************  | 
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 our $re_size = qr/$re_number(?:em|ex|px|in|cm|mm|pt|pc)/i;  | 
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 # regular expression to match any length property  | 
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 #**************************************************************************************************  | 
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 our $re_length = qr/$re_number(?:em|ex|px|\%|in|cm|mm|pt|pc)?/i;  | 
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 # match a octal number from 0 to 255 (strict match)  | 
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 #**************************************************************************************************  | 
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 our $re_byte = qr/(?:0|[1-9]\d?|1\d{2}|2(?:[0-4]\d|5[0-5]))/s;  | 
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 # parse dimension from pixel  | 
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 #**************************************************************************************************  | 
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 	# return undef if nothing passed  | 
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 	return unless defined $_[0];  | 
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 	# parse number via regular expression (pretty strict)  | 
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 	$_[0] =~ m/\A\s*($re_number)(?:px)?\s*\z/i ? $1 : undef;  | 
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 }  | 
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 # adds pixel unit  | 
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 #**************************************************************************************************  | 
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 sub toPx  | 
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 	# parse via fromPx  | 
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 	my $px = fromPx($_[0]);  | 
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 	# check if input was valid  | 
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 	return undef unless defined $px;  | 
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 	# format correctly  | 
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 	sprintf "%gpx", $px  | 
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 }  | 
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 ####################################################################################################  | 
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 ####################################################################################################  | 
| 
73
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 1;  |