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<% yield to <%= yield in rdoc of _layout_for, and copy-edits it now that we are on it

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Xavier Noria 2010-04-05 02:16:24 -07:00
parent 9ed176d711
commit 43d02dffcb
1 changed files with 31 additions and 17 deletions
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48
actionpack/lib/action_view/render/layouts.rb
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@ -1,37 +1,51 @@
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).
# Returns the contents that are yielded to a layout, given a name or a block.
#
# The user can override this default by passing a block to the layout.
# You can think of a layout as a method that is called with a block. If the user calls
# <tt>yield :some_name</tt>, the block, by default, returns <tt>content_for(:some_name)</tt>.
# If the user calls simply +yield+, the default block returns <tt>content_for(:layout)</tt>.
#
# ==== Example
# The user can override this default by passing a block to the layout:
#
# # The template
# <%= render :layout => "my_layout" do %>Content<% end %>
# <%= render :layout => "my_layout" do %>
# Content
# <% end %>
#
# # The layout
# <html><% yield %></html>
# <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>.
# In this case, instead of the default block, which would return <tt>content_for(:layout)</tt>,
# this method returns the block that was passed in to <tt>render :layout</tt>, and the response
# would be
#
# Finally, the block can take block arguments, which can be passed in by yield.
# <html>
# Content
# </html>
#
# ==== Example
# Finally, the block can take block arguments, which can be passed in by +yield+:
#
# # The template
# <%= render :layout => "my_layout" do |customer| %>Hello <%= customer.name %><% end %>
# <%= render :layout => "my_layout" do |customer| %>
# Hello <%= customer.name %>
# <% end %>
#
# # The layout
# <html><% yield Struct.new(:name).new("David") %></html>
# <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>.
# and the struct specified would be passed into the block as an argument. The result
# would be
#
# <html>
# Hello David
# </html>
#
def _layout_for(name = nil, &block) #:nodoc:
if !block || name
@_content_for[name || :layout]