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| author | José Valim <jose.valim@gmail.com> | 2010-03-08 14:46:57 +0100 |
|---|---|---|
| committer | José Valim <jose.valim@gmail.com> | 2010-03-08 14:46:57 +0100 |
| commit | ea68fe59c670dd5580f3aa34fdfa0eb89eb717d3 (patch) | |
| tree | 2321ba1aa0e720af1de7c7a87b17fc5075cf07a6 /actionpack/lib/action_view/render/layouts.rb | |
| parent | 0a85380966e47a38292242e6c3b259d77c738ab5 (diff) | |
| download | rails-ea68fe59c670dd5580f3aa34fdfa0eb89eb717d3.tar.gz rails-ea68fe59c670dd5580f3aa34fdfa0eb89eb717d3.tar.bz2 rails-ea68fe59c670dd5580f3aa34fdfa0eb89eb717d3.zip | |
More refactoring on the views side of rendering.
Diffstat (limited to 'actionpack/lib/action_view/render/layouts.rb')
| -rw-r--r-- | actionpack/lib/action_view/render/layouts.rb | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/render/layouts.rb b/actionpack/lib/action_view/render/layouts.rb new file mode 100644 index 0000000000..e1dbd3c120 --- /dev/null +++ b/actionpack/lib/action_view/render/layouts.rb @@ -0,0 +1,64 @@ +require 'active_support/core_ext/object/try' + +module ActionView + module Layouts + + # You can think of a layout as a method that is called with a block. _layout_for + # returns the contents that are yielded to the layout. If the user calls yield + # :some_name, the block, by default, returns content_for(:some_name). If the user + # calls yield, the default block returns content_for(:layout). + # + # The user can override this default by passing a block to the layout. + # + # ==== Example + # + # # The template + # <% render :layout => "my_layout" do %>Content<% end %> + # + # # The layout + # <html><% yield %></html> + # + # In this case, instead of the default block, which would return content_for(:layout), + # this method returns the block that was passed in to render layout, and the response + # would be <html>Content</html>. + # + # Finally, the block can take block arguments, which can be passed in by yield. + # + # ==== Example + # + # # The template + # <% render :layout => "my_layout" do |customer| %>Hello <%= customer.name %><% end %> + # + # # The layout + # <html><% yield Struct.new(:name).new("David") %></html> + # + # In this case, the layout would receive the block passed into <tt>render :layout</tt>, + # and the Struct specified in the layout would be passed into the block. The result + # would be <html>Hello David</html>. + def _layout_for(name = nil, &block) #:nodoc: + if !block || name + @_content_for[name || :layout] + else + capture(&block) + end + end + + # This is the method which actually finds the layout using details in the lookup + # context object. If no layout is found, it checkes if at least a layout with + # the given name exists across all details before raising the error. + def _find_layout(layout) #:nodoc: + begin + find(layout) + rescue ActionView::MissingTemplate => e + update_details(:formats => nil) do + raise unless template_lookup.exists?(layout) + end + end + end + + # Contains the logic that actually renders the layout. + def _render_layout(layout, locals, &block) #:nodoc: + layout.render(self, locals){ |*name| _layout_for(*name, &block) } + end + end +end |