require 'active_support/core_ext/object/try' module ActionView module Rendering # Returns the result of a render that's dictated by the options hash. The primary options are: # # * :partial - See ActionView::Partials. # * :update - Calls update_page with the block given. # * :file - Renders an explicit template file (this used to be the old default), add :locals to pass in those. # * :inline - Renders an inline template similar to how it's done in the controller. # * :text - Renders the text passed in out. # # If no options hash is passed or :update specified, the default is to render a partial and use the second parameter # as the locals hash. def render(options = {}, locals = {}, &block) case options when Hash if block_given? _render_partial(options.merge(:partial => options[:layout]), &block) elsif options.key?(:partial) _render_partial(options) else template = _determine_template(options) lookup_context.freeze_formats(template.formats, true) _render_template(template, options[:layout], options) end when :update update_page(&block) else _render_partial(:partial => options, :locals => locals) end end # Determine the template to be rendered using the given options. def _determine_template(options) #:nodoc: if options.key?(:inline) handler = Template.handler_class_for_extension(options[:type] || "erb") Template.new(options[:inline], "inline template", handler, {}) elsif options.key?(:text) Template::Text.new(options[:text], formats.try(:first)) elsif options.key?(:file) with_fallbacks { find_template(options[:file], options[:prefix]) } elsif options.key?(:template) options[:template].respond_to?(:render) ? options[:template] : find_template(options[:template], options[:prefix]) end end # Renders the given template. An string representing the layout can be # supplied as well. def _render_template(template, layout = nil, options = {}) #:nodoc: locals = options[:locals] || {} layout = find_layout(layout) if layout ActiveSupport::Notifications.instrument("action_view.render_template", :identifier => template.identifier, :layout => layout.try(:virtual_path)) do content = template.render(self, locals) { |*name| _layout_for(*name) } @_content_for[:layout] = content content = _render_layout(layout, locals) if layout content end end end end