module ActionView # NOTE: The template that this mixin is being included into is frozen # so you cannot set or modify any instance variables module Renderable #:nodoc: extend ActiveSupport::Memoizable def filename 'compiled-template' end def handler Template.handler_class_for_extension(extension) end memoize :handler def compiled_source handler.call(self) end memoize :compiled_source def method_name_without_locals ['_run', extension, method_segment].compact.join('_') end memoize :method_name_without_locals def render(view, local_assigns = {}) compile(local_assigns) stack = view.instance_variable_get(:@_render_stack) stack.push(self) view.send(:_evaluate_assigns_and_ivars) view.send(:_set_controller_content_type, mime_type) if respond_to?(:mime_type) result = view.send(method_name(local_assigns), local_assigns) do |*names| ivar = :@_proc_for_layout if !view.instance_variable_defined?(:"@content_for_#{names.first}") && view.instance_variable_defined?(ivar) && (proc = view.instance_variable_get(ivar)) view.capture(*names, &proc) elsif view.instance_variable_defined?(ivar = :"@content_for_#{names.first || :layout}") view.instance_variable_get(ivar) end end stack.pop result end def method_name(local_assigns) if local_assigns && local_assigns.any? method_name = method_name_without_locals.dup method_name << "_locals_#{local_assigns.keys.map { |k| k.to_s }.sort.join('_')}" else method_name = method_name_without_locals end method_name.to_sym end private # Compile and evaluate the template's code (if necessary) def compile(local_assigns) render_symbol = method_name(local_assigns) if !Base::CompiledTemplates.method_defined?(render_symbol) || recompile? compile!(render_symbol, local_assigns) end end def compile!(render_symbol, local_assigns) locals_code = local_assigns.keys.map { |key| "#{key} = local_assigns[:#{key}];" }.join source = <<-end_src def #{render_symbol}(local_assigns) old_output_buffer = output_buffer;#{locals_code};#{compiled_source} ensure self.output_buffer = old_output_buffer end end_src begin ActionView::Base::CompiledTemplates.module_eval(source, filename, 0) rescue Exception => e # errors from template code if logger = defined?(ActionController) && Base.logger logger.debug "ERROR: compiling #{render_symbol} RAISED #{e}" logger.debug "Function body: #{source}" logger.debug "Backtrace: #{e.backtrace.join("\n")}" end raise ActionView::TemplateError.new(self, {}, e) end end def recompile? false end end end