From dd5a4c4c528c4aab71b336d8dc4f5827cfbc9e0c Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Sat, 2 May 2009 15:01:05 -0500
Subject: initial import

---
 lib/IkiWiki/Plugin/highlight.pm | 93 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 lib/IkiWiki/Plugin/highlight.pm

diff --git a/lib/IkiWiki/Plugin/highlight.pm b/lib/IkiWiki/Plugin/highlight.pm
new file mode 100644
index 0000000..f2de12d
--- /dev/null
+++ b/lib/IkiWiki/Plugin/highlight.pm
@@ -0,0 +1,93 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+package IkiWiki::Plugin::highlight;
+use IkiWiki '3.00';
+use Syntax::Highlight::Engine::Kate;
+
+# variables {{{
+my %hl_args = (
+    substitutions => { },
+    format_table  => {
+        Alert        => ["<span class='synAlert'>",        "</span>"],
+        BaseN        => ["<span class='synBaseN'>",        "</span>"],
+        BString      => ["<span class='synBString'>",      "</span>"],
+        Char         => ["<span class='synChar'>",         "</span>"],
+        Comment      => ["<span class='synComment'>",      "</span>"],
+        DataType     => ["<span class='synDataType'>",     "</span>"],
+        DecVal       => ["<span class='synDecVal'>",       "</span>"],
+        Error        => ["<span class='synError'>",        "</span>"],
+        Float        => ["<span class='synFloat'>",        "</span>"],
+        Function     => ["<span class='synFunction'>",     "</span>"],
+        IString      => ["<span class='synIString'>",      "</span>"],
+        Keyword      => ["<span class='synKeyword'>",      "</span>"],
+        Normal       => ["",                               ""       ],
+        Operator     => ["<span class='synOperator'>",     "</span>"],
+        Others       => ["<span class='synOthers'>",       "</span>"],
+        RegionMarker => ["<span class='synRegionMarker'>", "</span>"],
+        Reserved     => ["<span class='synReserved'>",     "</span>"],
+        String       => ["<span class='synString'>",       "</span>"],
+        Variable     => ["<span class='synVariable'>",     "</span>"],
+        Warning      => ["<span class='synWarning'>",      "</span>"],
+    },
+);
+my %syntaxes;
+# }}}
+
+sub import { # {{{
+    hook(type => 'sanitize', id => __PACKAGE__, call => \&sanitize, first => 1);
+} # }}}
+
+sub sanitize { # {{{
+    my %args = @_;
+    my $content = '';
+    my $in_code = 0;
+    for my $line (split /^/m, $args{content}) {
+        if ($in_code) {
+            if ($line =~ s{(</code></pre>.*)}{}s) {
+                my $rest_line = $1;
+                $code_block .= $line;
+                $content .= highlight($code_block) . $rest_line;
+                $code_block = '';
+                $in_code = 0;
+            }
+            else {
+                $code_block .= $line;
+            }
+        }
+        else {
+            if ($line =~ s{(.*<pre><code>)}{}s) {
+                $content .= $1;
+                $code_block .= $line;
+                $in_code = 1;
+            }
+            else {
+                $content .= $line;
+            }
+        }
+    }
+    $content .= $code_block;
+    return $content;
+} # }}}
+
+sub highlight { # {{{
+    my ($code_block) = @_;
+    my $filetype = guess_filetype($code_block);
+    return unless $filetype;
+    my $hl = Syntax::Highlight::Engine::Kate->new(
+        language => $filetype, %hl_args
+    );
+    %syntaxes ||= map { lc($_) => $hl->syntaxes->{$_} } keys %$hl->syntaxes;
+    return $hl->highlightText($code_block);
+} # }}}
+
+sub guess_filetype { # {{{
+    my ($code_block) = @_;
+    my ($first_line) = split /\n/, $code_block;
+    if ($first_line =~ /^#!(\w+)/) {
+        return $syntaxes{$1};
+    }
+    return;
+} # }}}
+
+1;
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