Add Globalize2 so that we get some nice fall backs to other languages when a translat...

[rails.git] / vendor / plugins / globalize2 / lib / globalize / locale / fallbacks.rb

diff --git a/vendor/plugins/globalize2/lib/globalize/locale/fallbacks.rb b/vendor/plugins/globalize2/lib/globalize/locale/fallbacks.rb
new file mode 100644 (file)
index 0000000..c4acd57
--- /dev/null
+++ b/vendor/plugins/globalize2/lib/globalize/locale/fallbacks.rb
@@ -0,0 +1,63 @@
+require 'globalize/locale/language_tag'
+
+module I18n
+  @@fallbacks = nil
+    
+  class << self
+    # Returns the current fallbacks. Defaults to +Globalize::Locale::Fallbacks+.
+    def fallbacks
+      @@fallbacks ||= Globalize::Locale::Fallbacks.new
+    end
+    
+    # Sets the current fallbacks. Used to set a custom fallbacks instance.
+    def fallbacks=(fallbacks) 
+      @@fallbacks = fallbacks
+    end
+  end
+end
+
+module Globalize
+  module Locale
+    class Fallbacks < Hash
+      def initialize(*defaults)
+        @map = {}
+        map defaults.pop if defaults.last.is_a?(Hash)
+        
+        defaults = [I18n.default_locale.to_sym] if defaults.empty?
+        self.defaults = defaults 
+      end
+      
+      def defaults=(defaults)
+        @defaults = defaults.map{|default| compute(default, false) }.flatten << :root
+      end
+      attr_reader :defaults
+      
+      def [](tag)
+        tag = tag.to_sym
+        has_key?(tag) ? fetch(tag) : store(tag, compute(tag))
+      end
+    
+      def map(mappings)
+        mappings.each do |from, to|
+          from, to = from.to_sym, Array(to)
+          to.each do |to|
+            @map[from] ||= []
+            @map[from] << to.to_sym
+          end
+        end
+      end
+      
+      protected
+    
+      def compute(tags, include_defaults = true)
+        result = Array(tags).collect do |tag|
+          tags = LanguageTag::tag(tag.to_sym).parents(true).map! {|t| t.to_sym }
+          tags.each{|tag| tags += compute(@map[tag]) if @map[tag] }
+          tags
+        end.flatten
+        result.push *defaults if include_defaults
+        result.uniq
+      end
+    end
+  end
+end