Replace Slugalizer/iconv with ActiveSupport::Multibyte. Gives us cros…

…s-platform-reliable slugalizing without external dependencies (beyond ActiveSupport).

README.markdown

@@ -2,9 +2,7 @@
 
 A simple plugin for creating URL-friendly permalinks (slugs) from attributes.
 
-Uses the the [`unicode` library](http://www.yoshidam.net/Ruby.html) (`gem install unicode`) if available.
-
-Falls back to `iconv` from the Ruby standard library if `unicode` can't be loaded, but note that this library is [inconsistent between platforms](http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/243426).
+Uses [`ActiveSupport::Multibyte::Handlers::UTF8Handler`](http://api.rubyonrails.org/classes/ActiveSupport/Multibyte/Handlers/UTF8Handler.html) (part of Rails since 1.2) rather than `iconv` (which is [inconsistent between platforms](http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/243426)) for normalization/decomposition.
 
 
 ## Usage
@@ -63,4 +61,4 @@ Originally extracted from [Mephisto](http://mephistoblog.com) by [technoweenie](
 
 Conditions added by [Pat Nakajima](http://github.com/nakajima/permalink_fu/).
 
-[Henrik Nyh](http://github.com/technoweenie/permalink_fu/) made various fixes, including the addition of the [slugalizer](http://github.com/henrik/slugalizer) library (originally by [Christoffer Sawicki](http://termos.vemod.net)).
+[Henrik Nyh](http://github.com/technoweenie/permalink_fu/) replaced `iconv` with `ActiveSupport::Multibyte`.

lib/permalink_fu.rb

@@ -1,30 +1,19 @@
-$LOAD_PATH << "#{File.dirname(__FILE__)}/../vendor"
-
 begin
-  require 'slugalizer'
+  require "active_support"
 rescue LoadError
-
-  message = "Couldn't load 'unicode' library! Falling back to iconv, which has issues: see README!"
-  defined?(RAILS_DEFAULT_LOGGER) ? RAILS_DEFAULT_LOGGER.warn(message) : STDERR.puts(message)
-
-  require 'iconv'
-  class Iconv
-    def self.slugalize(string)
-      s = Iconv.iconv('ascii//translit//IGNORE', 'utf-8', string).to_s
-      s.gsub!(/[^\w -]+/, '')  # strip unwanted characters
-      s.strip! # ohh la la
-      s.downcase!
-      s.gsub!(/[ -]+/, '-')  # separate by single dashes
-      s
-    end
-  end
-
+  require "rubygems"
+  require "active_support"
 end
 
 module PermalinkFu
+
   def self.escape(str)
-    object = Object.const_defined?(:Slugalizer) ? Slugalizer : Iconv
-    object.slugalize(str)
+    s = ActiveSupport::Multibyte::Handlers::UTF8Handler.normalize(str.to_s, :kd)
+    s.gsub!(/[^\w -]+/, '')  # strip unwanted characters
+    s.strip! # ohh la la
+    s.downcase!
+    s.gsub!(/[ -]+/, '-')  # separate by single dashes
+    s
   end
 
   def self.included(base)