Rails 2.3.11

[redminele/redminele.git] / ruby / lib / ruby / gems / 1.8 / gems / activesupport-2.3.11 / lib / active_support / vendor / i18n-0.4.1 / i18n / backend / memoize.rb

diff --git a/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.11/lib/active_support/vendor/i18n-0.4.1/i18n/backend/memoize.rb b/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.11/lib/active_support/vendor/i18n-0.4.1/i18n/backend/memoize.rb
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+# encoding: utf-8
+#
+# Memoize module simply memoizes the values returned by lookup using
+# a flat hash and can tremendously speed up the lookup process in a backend.
+#
+# To enable it you can simply include the Memoize module to your backend:
+#
+#   I18n::Backend::Simple.send(:include, I18n::Backend::Memoize)
+#
+# Notice that it's the responsibility of the backend to define whenever the
+# cache should be cleaned.
+module I18n
+  module Backend
+    module Memoize
+      def available_locales
+        @memoized_locales ||= super
+      end
+
+      def store_translations(locale, data, options = {})
+        reset_memoizations!(locale)
+        super
+      end
+
+      def reload!
+        reset_memoizations!
+        super
+      end
+
+      protected
+
+        def lookup(locale, key, scope = nil, options = {})
+          flat_key  = I18n::Backend::Flatten.normalize_flat_keys(locale,
+            key, scope, options[:separator]).to_sym
+          flat_hash = memoized_lookup[locale.to_sym]
+          flat_hash.key?(flat_key) ? flat_hash[flat_key] : (flat_hash[flat_key] = super)
+        end
+
+        def memoized_lookup
+          @memoized_lookup ||= Hash.new { |h, k| h[k] = {} }
+        end
+
+        def reset_memoizations!(locale=nil)
+          @memoized_locales = nil
+          (locale ? memoized_lookup[locale.to_sym] : memoized_lookup).clear
+        end
+    end
+  end
+end
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