mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
64 lines
2.2 KiB
Ruby
64 lines
2.2 KiB
Ruby
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_template(layout)
|
|
rescue ActionView::MissingTemplate => e
|
|
update_details(:formats => nil) do
|
|
raise unless template_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
|