Initial

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 59 insertions, 0 deletions

diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
new file mode 100644
index 0000000000..90084c7a8d
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+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -0,0 +1,59 @@
+require 'cgi'
+
+module ActionView
+  module Helpers
+    # This is poor man's Builder for the rare cases where you need to programmatically make tags but can't use Builder.
+    module TagHelper
+      include ERB::Util
+
+      # Examples: 
+      # * tag("br") => <br />
+      # * tag("input", { "type" => "text"}) => <input type="text" />
+      def tag(name, options = {}, open = false)
+        "<#{name + tag_options(options)}" + (open ? ">" : " />")
+      end
+      
+      # Examples: 
+      # * content_tag("p", "Hello world!") => <p>Hello world!</p>
+      # * content_tag("div", content_tag("p", "Hello world!"), "class" => "strong") => 
+      #   <div class="strong"><p>Hello world!</p></div>
+      def content_tag(name, content, options = {})
+        "<#{name + tag_options(options)}>#{content}</#{name}>"
+      end
+
+      # Starts a form tag that points the action to an url configured with <tt>url_for_options</tt> just like 
+      # ActionController::Base#url_for.
+      def form_tag(url_for_options, options = {}, *parameters_for_url)
+        html_options = { "method" => "POST" }.merge(options)
+        
+        if html_options[:multipart]
+          html_options["enctype"] = "multipart/form-data"
+          html_options.delete(:multipart)
+        end
+        
+        html_options["action"] = url_for(url_for_options, *parameters_for_url)
+        
+        tag("form", html_options, true)
+      end
+      
+      alias_method :start_form_tag, :form_tag
+
+      # Outputs "</form>"
+      def end_form_tag
+        "</form>"
+      end
+
+
+      private
+        def tag_options(options)
+          if options.empty?
+            ""
+          else
+            " " + options.collect { |pair| 
+              "#{pair.first}=\"#{html_escape(pair.last)}\"" 
+            }.sort.join(" ") 
+          end
+        end
+    end
+  end
+end
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