Added TagHelper#image_tag and deprecated UrlHelper#link_image_to (recommended approach is to combine image_tag and link_to instead)

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@879 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Added TagHelper#image_tag and deprecated UrlHelper#link_image_to (recommended approach is to combine image_tag and link_to instead)
+
 * Fixed textilize to be resilient to getting nil parsed (by using Object#blank? instead of String#empty?)
 
 * Fixed that the :multipart option in FormTagHelper#form_tag would be ignored [Yonatan Feldman]

actionpack/lib/action_view/helpers/tag_helper.rb

@@ -22,9 +22,36 @@ module ActionView
         "<#{name}#{tag_options(options)}>#{content}</#{name}>"
       end
 
+
+      # Returns an image tag converting the +options+ instead html options on the tag, but with these special cases:
+      #
+      # * <tt>:alt</tt>  - If no alt text is given, the file name part of the +src+ is used (capitalized and without the extension)
+      # * <tt>:size</tt> - Supplied as "XxY", so "30x45" becomes width="30" and height="45"
+      #
+      # The +src+ can be supplied as a...
+      # * full path, like "/my_images/image.gif"
+      # * file name, like "rss.gif", that gets expanded to "/images/rss.gif"
+      # * file name without extension, like "logo", that gets expanded to "/images/logo.png"
+      def image_tag(src, options = {})
+        options.symbolize_keys
+  
+        options.update({ :src => src.include?("/") ? src : "/images/#{src}" })
+        options[:src] += ".png" unless options[:src].include?(".")
+
+        options[:alt] ||= src.split("/").last.split(".").first.capitalize
+        
+        if options[:size]
+          options[:width], options[:height] = options[:size].split("x")
+          options.delete :size
+        end
+
+        tag("img", options)
+      end
+
       private
         def tag_options(options)
           unless options.empty?
+            options.symbolize_keys
             " " + options.map { |key, value|
               %(#{key}="#{html_escape(value.to_s)}")
             }.sort.join(" ")
@@ -32,4 +59,4 @@ module ActionView
         end
     end
   end
-end
+end

actionpack/lib/action_view/helpers/url_helper.rb

@@ -52,6 +52,9 @@ module ActionView
       # Examples:
       #   link_image_to "logo", { :controller => "home" }, :alt => "Homepage", :size => "45x80"
       #   link_image_to "delete", { :action => "destroy" }, :size => "10x10", :confirm => "Are you sure?", "class" => "admin"
+      #
+      # NOTE: This tag is deprecated. Combine the link_to and image_tag yourself instead, like:
+      #   link_to(image_tag("rss", :size => "30x45", :border => 0), "http://www.example.com")
       def link_image_to(src, options = {}, html_options = {}, *parameters_for_method_reference)
         image_options = { "src" => src.include?("/") ? src : "/images/#{src}" }
         image_options["src"] += ".png" unless image_options["src"].include?(".")

actionpack/test/template/tag_helper_test.rb

@@ -1,4 +1,5 @@
-require 'test/unit'
+require File.dirname(__FILE__) + '/../abstract_unit'
+
 require File.dirname(__FILE__) + '/../../lib/action_view/helpers/tag_helper'
 require File.dirname(__FILE__) + '/../../lib/action_view/helpers/url_helper'
 
@@ -17,17 +18,7 @@ class TagHelperTest < Test::Unit::TestCase
                  content_tag("a", "Create", :href => "create")
   end
 
-  def test_mail_to_with_javascript
-    assert_equal "<script type=\"text/javascript\" language=\"javascript\">eval(unescape('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%22%3e%4d%79%20%65%6d%61%69%6c%3c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript")
+  def test_image_tag
+    assert_equal %(<img alt="Gold" height="70" src="/images/gold.png" width="45" />), image_tag("gold", :size => "45x70")
   end
-
-  def test_mail_to_with_hex
-    assert_equal "<a href=\"mailto:%6d%65@%64%6f%6d%61%69%6e.%63%6f%6d\">My email</a>", mail_to("me@domain.com", "My email", :encode => "hex")
-  end
-
-  def test_mail_to
-    assert_equal "<a href=\"mailto:me@domain.com\">My email</a>", mail_to("me@domain.com", "My email")
-  end
-
-  # FIXME: Test form tag
 end

actionpack/test/template/url_helper_test.rb

@@ -1,4 +1,5 @@
-require 'test/unit'
+require File.dirname(__FILE__) + '/../abstract_unit'
+
 require File.dirname(__FILE__) + '/../../lib/action_view/helpers/url_helper'
 require File.dirname(__FILE__) + '/../../lib/action_view/helpers/tag_helper'
 
@@ -39,6 +40,11 @@ class UrlHelperTest < Test::Unit::TestCase
       link_image_to("rss", "http://www.example.com", "size" => "30x45", "border" => "0")
     )
 
+    assert_equal(
+      "<a href=\"http://www.example.com\"><img alt=\"Rss\" border=\"0\" height=\"45\" src=\"/images/rss.png\" width=\"30\" /></a>",
+      link_to(image_tag("rss", :size => "30x45", :border => 0), "http://www.example.com")
+    )
+
     assert_equal(
       "<a class=\"admin\" href=\"http://www.example.com\"><img alt=\"Feed\" height=\"45\" src=\"/images/rss.gif\" width=\"30\" /></a>",
       link_image_to("rss.gif", "http://www.example.com", "size" => "30x45", "alt" => "Feed", "class" => "admin")
@@ -93,6 +99,15 @@ class UrlHelperTest < Test::Unit::TestCase
                  mail_to("david@loudthinking.com", "David Heinemeier Hansson", :class => "admin")
   end
 
+
+  def test_mail_to_with_javascript
+    assert_equal "<script type=\"text/javascript\" language=\"javascript\">eval(unescape('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%22%3e%4d%79%20%65%6d%61%69%6c%3c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript")
+  end
+
+  def test_mail_to_with_hex
+    assert_equal "<a href=\"mailto:%6d%65@%64%6f%6d%61%69%6e.%63%6f%6d\">My email</a>", mail_to("me@domain.com", "My email", :encode => "hex")
+  end
+
   def test_link_with_nil_html_options
     assert_equal "<a href=\"http://www.example.com\">Hello</a>", link_to("Hello", {:action => 'myaction'}, nil)
   end