95 lines
3.1 KiB
Ruby
95 lines
3.1 KiB
Ruby
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module ActionView
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# NOTE: The template that this mixin is being included into is frozen
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# so you cannot set or modify any instance variables
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module Renderable #:nodoc:
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extend ActiveSupport::Memoizable
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def self.included(base)
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@@mutex = Mutex.new
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end
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def filename
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'compiled-template'
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end
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def handler
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Template.handler_class_for_extension(extension)
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end
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memoize :handler
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def compiled_source
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handler.call(self)
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end
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memoize :compiled_source
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def render(view, local_assigns = {})
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compile(local_assigns)
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view.send(:_first_render=, self) unless view.send(:_first_render)
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view.send(:_last_render=, self)
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view.send(:_evaluate_assigns_and_ivars)
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view.send(:_set_controller_content_type, mime_type) if respond_to?(:mime_type)
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view.send(method_name(local_assigns), local_assigns) do |*names|
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ivar = :@_proc_for_layout
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if view.instance_variable_defined?(ivar) and proc = view.instance_variable_get(ivar)
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view.capture(*names, &proc)
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elsif view.instance_variable_defined?(ivar = :"@content_for_#{names.first || :layout}")
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view.instance_variable_get(ivar)
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end
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end
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end
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def method_name(local_assigns)
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if local_assigns && local_assigns.any?
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local_assigns_keys = "locals_#{local_assigns.keys.map { |k| k.to_s }.sort.join('_')}"
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end
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['_run', extension, method_segment, local_assigns_keys].compact.join('_').to_sym
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end
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private
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# Compile and evaluate the template's code (if necessary)
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def compile(local_assigns)
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render_symbol = method_name(local_assigns)
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@@mutex.synchronize do
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if recompile?(render_symbol)
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compile!(render_symbol, local_assigns)
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end
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end
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end
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def compile!(render_symbol, local_assigns)
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locals_code = local_assigns.keys.map { |key| "#{key} = local_assigns[:#{key}];" }.join
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source = <<-end_src
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def #{render_symbol}(local_assigns)
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old_output_buffer = output_buffer;#{locals_code};#{compiled_source}
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ensure
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self.output_buffer = old_output_buffer
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end
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end_src
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begin
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ActionView::Base::CompiledTemplates.module_eval(source, filename, 0)
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rescue Exception => e # errors from template code
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if logger = defined?(ActionController) && Base.logger
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logger.debug "ERROR: compiling #{render_symbol} RAISED #{e}"
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logger.debug "Function body: #{source}"
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logger.debug "Backtrace: #{e.backtrace.join("\n")}"
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end
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raise ActionView::TemplateError.new(self, {}, e)
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end
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end
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# Method to check whether template compilation is necessary.
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# The template will be compiled if the file has not been compiled yet, or
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# if local_assigns has a new key, which isn't supported by the compiled code yet.
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def recompile?(symbol)
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!(ActionView::PathSet::Path.eager_load_templates? && Base::CompiledTemplates.method_defined?(symbol))
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end
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end
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end
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