module ActionView::Helpers::CacheHelper

<% end %>
Topics listed alphabetically
<%= render :partial => "topics", :collection => @topic_list %>
Topics:
<% cache do %>

...and static content mixed with RHTML content.

<% end %>

Hello users! Welcome to our website!

<% cache do %>

You can also cache static content...

<% end %>
<%= render :partial => "menu" %>
<% cache do %>

following.
If you wanted to cache a navigation menu, you could do the
==== Examples

information.
to cache. See ActionController::Caching::Fragments for more
This method takes a block that contains the content you wish
menus, lists of news topics, static HTML fragments, and so on.
action or page. This technique is useful caching pieces like
A method for caching fragments of a view rather than an entire

See ActionController::Caching::Fragments for usage instructions.
This helper to exposes a method for caching of view fragments.

def cache(name = {}, options = nil, &block)
  if controller.perform_caching
    safe_concat(fragment_for(name, options, &block))
  else
    yield
  end
  nil
end

:nodoc:
TODO: Create an object that has caching read/write on it

def fragment_for(name = {}, options = nil, &block) #:nodoc:
  if fragment = controller.read_fragment(name, options)
    fragment
  else
    # VIEW TODO: Make #capture usable outside of ERB
    # This dance is needed because Builder can't use capture
    pos = output_buffer.length
    yield
    if output_buffer.html_safe?
      safe_output_buffer = output_buffer.to_str
      fragment = safe_output_buffer.slice!(pos..-1)
      self.output_buffer = output_buffer.class.new(safe_output_buffer)
    else
      fragment = output_buffer.slice!(pos..-1)
    end
    controller.write_fragment(name, fragment, options)
  end
end