Modularized Helpers, allows enable/disable of self-closing XHTML

tags (<link .../>) by
enable :xhtml
in your Application file

lib/sinatra/static_assets.rb

@@ -3,74 +3,81 @@ require 'sinatra/url_for'
 
 module Sinatra
   module StaticAssets
-    # In HTML <link> and <img> tags have no end tag.
-    # In XHTML, on the contrary, these tags must be properly closed.
-    #
-    # We can choose the appropriate behaviour with +closed+ option:
-    #
-    #   image_tag "/images/foo.png", :alt => "Foo itself", :closed => true
-    #
-    # The default value of +closed+ option is +false+.
-    #
-    def image_tag(source, options = {})
-      options[:src] = url_for(source)
-      tag("img", options)
-    end
-
-    def stylesheet_link_tag(*sources)
-      list, options = extract_options(sources)
-      list.collect { |source| stylesheet_tag(source, options) }.join("\n")
-    end
-
-    def javascript_script_tag(*sources)
-      list, options = extract_options(sources)
-      list.collect { |source| javascript_tag(source, options) }.join("\n")
-    end
-    
-    def link_to(desc, url, options = {})
-      tag("a", options.merge(:href => url_for(url))) do
-        desc
+    module Helpers
+      # In HTML <link> and <img> tags have no end tag.
+      # In XHTML, on the contrary, these tags must be properly closed.
+      #
+      # We can choose the appropriate behaviour with +closed+ option:
+      #
+      #   image_tag "/images/foo.png", :alt => "Foo itself", :closed => true
+      #
+      # The default value of +closed+ option is +false+.
+      #
+      def image_tag(source, options = {})
+        options[:src] = url_for(source)
+        tag("img", options)
       end
-    end
 
-    private
-    
-    def tag(name, options = {})
-      start_tag = "<#{name}#{tag_options(options) if options}"
-      if block_given?
-        content = yield
-        "#{start_tag}>#{content}</#{name}>"
-      else
-        "#{start_tag}/>"
+      def stylesheet_link_tag(*sources)
+        list, options = extract_options(sources)
+        list.collect { |source| stylesheet_tag(source, options) }.join("\n")
       end
-    end
 
-    def tag_options(options)
-      unless options.empty?
-        attrs = []
-        attrs = options.map { |key, value| %(#{key}="#{Rack::Utils.escape_html(value)}") }
-        " #{attrs.sort * ' '}" unless attrs.empty?
+      def javascript_script_tag(*sources)
+        list, options = extract_options(sources)
+        list.collect { |source| javascript_tag(source, options) }.join("\n")
       end
-    end
 
-    def stylesheet_tag(source, options = {})
-      tag("link", { :type => "text/css",
+      def link_to(desc, url, options = {})
+        tag("a", options.merge(:href => url_for(url))) do
+          desc
+        end
+      end
+
+      private
+
+      def tag(name, local_options = {})
+        start_tag = "<#{name}#{tag_options(local_options) if local_options}"
+        if block_given?
+          content = yield
+          "#{start_tag}>#{content}</#{name}>"
+        else
+          "#{start_tag}#{"/" if options.xhtml}>"
+        end
+      end
+
+      def tag_options(options)
+        unless options.empty?
+          attrs = []
+          attrs = options.map { |key, value| %(#{key}="#{Rack::Utils.escape_html(value)}") }
+          " #{attrs.sort * ' '}" unless attrs.empty?
+        end
+      end
+
+      def stylesheet_tag(source, options = {})
+        tag("link", { :type => "text/css",
             :charset => "utf-8", :media => "screen", :rel => "stylesheet",
             :href => url_for(source) }.merge(options))
-    end
-    
-    def javascript_tag(source, options = {})
-      tag("script", { :type => "text/javascript", :charset => "utf-8",
-            :src => url_for(source) }.merge(options)) do
       end
+
+      def javascript_tag(source, options = {})
+        tag("script", { :type => "text/javascript", :charset => "utf-8",
+            :src => url_for(source) }.merge(options)) do
+            end
+      end
+
+      def extract_options(a)
+        opts = a.last.is_a?(::Hash) ? a.pop : {}
+        [a, opts]  
+      end
+
     end
 
-    def extract_options(a)
-      opts = a.last.is_a?(::Hash) ? a.pop : {}
-      [a, opts]  
+    def self.registered(app)
+      app.helpers StaticAssets::Helpers
+      app.disable :xhtml
     end
-
   end
 
-  helpers StaticAssets
+  register StaticAssets
 end