X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/cdd1b58b386da575f3c73ab94ae72e5e66be797b..ec26a9619358498afb817c759625607d3b40f15d:/IkiWiki/Plugin/highlight.pm

diff --git a/IkiWiki/Plugin/highlight.pm b/IkiWiki/Plugin/highlight.pm
index 117ab5898..9bdde85ae 100644
--- a/IkiWiki/Plugin/highlight.pm
+++ b/IkiWiki/Plugin/highlight.pm
@@ -4,7 +4,7 @@ package IkiWiki::Plugin::highlight;
 use warnings;
 use strict;
 use IkiWiki 3.00;
-use highlight;
+use Encode;
 
 # locations of highlight's files
 my $filetypes="/etc/highlight/filetypes.conf";
@@ -13,6 +13,9 @@ my $langdefdir="/usr/share/highlight/langDefs";
 sub import {
 	hook(type => "getsetup", id => "highlight",  call => \&getsetup);
 	hook(type => "checkconfig", id => "highlight", call => \&checkconfig);
+	# this hook is used by the format plugin
+	hook(type => "htmlizefallback", id => "highlight", call =>
+		\&htmlizefallback);
 }
 
 sub getsetup () {
@@ -24,7 +27,7 @@ sub getsetup () {
 		tohighlight => {
 			type => "string",
 			example => ".c .h .cpp .pl .py Makefile:make",
-			description => "source files to syntax highlight",
+			description => "types of source files to syntax highlight",
 			safe => 1,
 			rebuild => 1,
 		},
@@ -59,8 +62,20 @@ sub checkconfig () {
 	}
 }
 
+sub htmlizefallback {
+	my $format=lc shift;
+	my $langfile=ext2langfile($format);
+
+	if (! defined $langfile) {
+		return;
+	}
+
+	return Encode::decode_utf8(highlight($langfile, shift));
+}
+
 my %ext2lang;
 my $filetypes_read=0;
+my %highlighters;
 
 # Parse highlight's config file to get extension => language mappings.
 sub read_filetypes () {
@@ -75,23 +90,23 @@ sub read_filetypes () {
 	$filetypes_read=1;
 }
 
-sub langfile ($) {
-	return "$langdefdir/$_[0].lang";
-}
 
 # Given a filename extension, determines the language definition to
 # use to highlight it.
 sub ext2langfile ($) {
 	my $ext=shift;
 
+	my $langfile="$langdefdir/$ext.lang";
+	return $langfile if exists $highlighters{$langfile};
+
 	read_filetypes() unless $filetypes_read;
 	if (exists $ext2lang{$ext}) {
-		return langfile($ext2lang{$ext});
+		return "$langdefdir/$ext2lang{$ext}.lang";
 	}
 	# If a language only has one common extension, it will not
 	# be listed in filetypes, so check the langfile.
-	elsif (-e langfile($ext)) {
-		return langfile($ext);
+	elsif (-e $langfile) {
+		return $langfile;
 	}
 	else {
 		return undef;
@@ -103,16 +118,27 @@ sub highlight ($$) {
 	my $langfile=shift;
 	my $input=shift;
 
-	my $gen = highlightc::CodeGenerator_getInstance($highlightc::XHTML);
-	$gen->setFragmentCode(1); # generate html fragment
-	$gen->setHTMLEnclosePreTag(1); # include stylish <pre>
-	$gen->initLanguage($langfile);
-	$gen->initTheme("/dev/null"); # theme is not needed because CSS is not emitted
-	$gen->setEncoding("utf-8");
+	eval q{use highlight};
+	if ($@) {
+		print STDERR gettext("warning: highlight perl module not available; falling back to pass through");
+		return $input;
+	}
+
+	my $gen;
+	if (! exists $highlighters{$langfile}) {
+		$gen = highlightc::CodeGenerator_getInstance($highlightc::XHTML);
+		$gen->setFragmentCode(1); # generate html fragment
+		$gen->setHTMLEnclosePreTag(1); # include stylish <pre>
+		$gen->initTheme("/dev/null"); # theme is not needed because CSS is not emitted
+		$gen->initLanguage($langfile); # must come after initTheme
+		$gen->setEncoding("utf-8");
+		$highlighters{$langfile}=$gen;
+	}
+	else {		
+		$gen=$highlighters{$langfile};
+	}
 
-	my $output=$gen->generateString($input);
-	highlightc::CodeGenerator_deleteInstance($gen);
-	return $output;
+	return $gen->generateString($input);
 }
 
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