ikiwiki/IkiWiki/Plugin/color.pm

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#!/usr/bin/perl
# Ikiwiki text colouring plugin
# Paweł Tęcza <ptecza@net.icm.edu.pl>
package IkiWiki::Plugin::color;
use warnings;
use strict;
use IkiWiki 2.00;
sub import {
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hook(type => "preprocess", id => "color", call => \&preprocess);
hook(type => "format", id => "color", call => \&format);
}
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sub preserve_style ($$$) {
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my $foreground = shift;
my $background = shift;
my $text = shift;
$foreground = defined $foreground ? lc($foreground) : '';
$background = defined $background ? lc($background) : '';
$text = '' unless (defined $text);
# Validate colors. Only color name or color code are valid.
$foreground = '' unless ($foreground &&
($foreground =~ /^[a-z]+$/ || $foreground =~ /^#[0-9a-f]{3,6}$/));
$background = '' unless ($background &&
($background =~ /^[a-z]+$/ || $background =~ /^#[0-9a-f]{3,6}$/));
my $preserved = '';
$preserved .= '<span class="color">';
$preserved .= 'color: '.$foreground if ($foreground);
$preserved .= '; ' if ($foreground && $background);
$preserved .= 'background-color: '.$background if ($background);
$preserved .= '</span>';
$preserved .= '<span class="colorend">'.$text.'</span>';
return $preserved;
}
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sub replace_preserved_style ($) {
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my $content = shift;
$content =~ s!<span class="color">((color: ([a-z]+|\#[0-9a-f]{3,6})?)?((; )?(background-color: ([a-z]+|\#[0-9a-f]{3,6})?)?)?)</span>!<span class="color" style="$1">!g;
$content =~ s!<span class="colorend">!!g;
return $content;
}
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sub preprocess (@) {
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my %params = @_;
# Preprocess the text to expand any preprocessor directives
# embedded inside it.
$params{text} = IkiWiki::preprocess($params{page}, $params{destpage},
IkiWiki::filter($params{page}, $params{destpage}, $params{text}));
return preserve_style($params{foreground}, $params{background}, $params{text});
}
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sub format (@) {
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my %params = @_;
$params{content} = replace_preserved_style($params{content});
return $params{content};
}
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