Add java htmlparser sources that match the original 52-level state

https://hg.mozilla.org/projects/htmlparser/
Commit: abe62ab2a9b69ccb3b5d8a231ec1ae11154c571d

parser/html/java/htmlparser/ruby-gcj/extconf.rb

@@ -0,0 +1,45 @@
+require 'mkmf'
+
+# system dependencies
+gcj  = with_config('gcj', '/usr/share/java/libgcj.jar')
+
+# headers for JAXP
+CONFIG['CC'] = 'g++'
+with_cppflags('-xc++') do
+
+  unless find_header('org/w3c/dom/Document.h', 'headers')
+  
+    `jar tf #{gcj}`.split.each do |file|
+      next unless file =~ /\.class$/
+      next unless file =~ /^(javax|org)\/(w3c|xml)/
+      next if file.include? '$'
+    
+      dest = 'headers/' + file.sub(/\.class$/,'.h')
+      name = file.sub(/\.class$/,'').gsub('/','.')
+    
+      next if File.exist? dest
+    
+      cmd = "gcjh -cp #{gcj} -o #{dest} #{name}"
+      puts cmd
+      break unless system cmd
+      system "ruby -pi -e '$_.sub!(/namespace namespace$/," +
+        "\"namespace namespace$\")' #{dest}"
+      system "ruby -pi -e '$_.sub!(/::namespace::/," +
+        "\"::namespace$::\")' #{dest}"
+    end
+
+    exit unless find_header('org/w3c/dom/Document.h', 'headers')
+  end
+
+  find_header 'nu/validator/htmlparser/dom/HtmlDocumentBuilder.h', 'headers'
+end
+
+# Java libraries
+Config::CONFIG['CC'] = 'g++ -shared'
+dir_config('nu-htmlparser', nil, 'lib')
+have_library 'nu-htmlparser'
+have_library 'nu-icu'
+have_library 'nu-chardet'
+
+# Ruby library
+create_makefile 'nu/validator'