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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::Background; |
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#################################################################################################### |
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our $VERSION = '0.2.5'; |
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#################################################################################################### |
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use strict; |
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use warnings; |
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our @EXPORT; |
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our @EXPORT_OK; |
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#################################################################################################### |
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# load exporter and inherit from it |
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use Exporter qw(); our @ISA = qw(Exporter); |
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# define our functions that will be exported |
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push @EXPORT, qw($re_bg_position fromPosition); |
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push @EXPORT, qw($re_bg_image $re_bg_attachment $re_bg_repeat); |
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push @EXPORT, qw($re_bg_positions $re_bg_position_y $re_bg_position_x); |
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#################################################################################################### |
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use OCBNET::CSS3::Regex::Base; |
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use OCBNET::CSS3::Regex::Numbers; |
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use OCBNET::CSS3::Regex::Comments; |
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use OCBNET::CSS3::Regex::Base qw($re_url); |
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#################################################################################################### |
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# regular expression for background options |
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#************************************************************************************************** |
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our $re_bg_image = qr/(?:none|$re_url|inherit)/i; |
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our $re_bg_attachment = qr/(?:scroll|fixed|inherit)/i; |
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our $re_bg_repeat = qr/(?:no-repeat|repeat(?:\-[xy])?)/i; |
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our $re_bg_position_y = qr/(?:top|bottom|center|$re_length)/i; |
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our $re_bg_position_x = qr/(?:left|right|center|$re_length)/i; |
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# regular expression for background position matching |
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#************************************************************************************************** |
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our $re_bg_position = qr/(?:left|right|top|bottom|center|$re_length)/i; |
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our $re_bg_positions = qr/$re_bg_position(?:\s+$re_bg_position)?/i; |
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#################################################################################################### |
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# parse background position |
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#************************************************************************************************** |
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sub fromPosition |
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{ |
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# get position string |
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0
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my ($position) = @_; |
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# default to left/top position |
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100
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return 0 unless (defined $position); |
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# allow keywords for left and top position |
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return 0 if ($position =~ m/^(?:top|left)$/i); |
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# return the parsed pixel number if matched |
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return $1 if ($position =~ m/^($re_number)(?:px)?$/i); |
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# right/bottom are the only valid keywords |
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# for the position for most other functions |
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return 'right' if ($position =~ m/^right$/i); |
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return 'bottom' if ($position =~ m/^bottom$/i); |
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# die with a fatal error for invalid positions |
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die "unknown background position: <$position>"; |
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} |
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#################################################################################################### |
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#################################################################################################### |
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1; |