better include helpers

lib/calendar_date_select/includes_helper.rb

@@ -1,12 +1,28 @@
 module CalendarDateSelect::IncludesHelper
+  def calendar_date_select_stylesheets_loaded?
+    @cds_stylesheets_loaded ||= false
+  end
+
+  def calendar_date_select_javascripts_loaded?
+    @cds_javascripts_loaded ||= false
+  end
+
   # returns the selected calendar_date_select stylesheet (not an array)
   def calendar_date_select_stylesheets(options = {})
+    return [] if @cds_stylesheets_loaded
+
+    @cds_stylesheets_loaded = true
+
     options.assert_valid_keys(:style)
     "calendar_date_select/#{options[:style] || "default"}"
   end
 
   # returns an array of javascripts needed for the selected locale, date_format, and calendar control itself.
   def calendar_date_select_javascripts(options = {})
+    return [] if @cds_javascripts_loaded
+
+    @cds_javascripts_loaded = true
+
     options.assert_valid_keys(:locale)
     files = ["calendar_date_select/calendar_date_select"]
     files << "calendar_date_select/locale/#{options[:locale]}" if options[:locale]
@@ -16,14 +32,32 @@ def calendar_date_select_javascripts(options = {})
 
   # returns html necessary to load javascript and css to make calendar_date_select work
   def calendar_date_select_includes(*args)
-    return "" if @cds_already_included
-    @cds_already_included=true
-
     options = (Hash === args.last) ? args.pop : {}
     options.assert_valid_keys(:style, :locale)
     options[:style] ||= args.shift
 
-    javascript_include_tag(*calendar_date_select_javascripts(:locale => options[:locale])) + "\n" +
-    stylesheet_link_tag(*calendar_date_select_stylesheets(:style => options[:style])) + "\n"
+    includes = [
+      javascript_include_tag(*calendar_date_select_javascripts(:locale => options[:locale])),
+      stylesheet_link_tag(*calendar_date_select_stylesheets(:style => options[:style]))
+    ]
+    includes << calendar_date_default_translation unless options[:locale]
+    includes
+  end
+
+  # from one of the comments of http://code.google.com/p/calendardateselect/wiki/HowToLocalize
+  def calendar_date_default_translation
+    scope = [ :calendar_date_select ]
+
+    update_page_tag do |page|
+      page.assign '_translations', {
+        'OK'    => I18n.t(:ok, :scope => scope),
+        'Now'   => I18n.t(:now, :scope => scope),
+        'Today' => I18n.t(:today, :scope => scope),
+        'Clear' => I18n.t(:clear, :scope => scope)
+      }
+      page.assign 'Date.weekdays', I18n.translate('date.abbr_day_names')
+      page.assign 'Date.months', I18n.translate('date.month_names')[1..-1]
+    end
   end
+
 end