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-rw-r--r--actionpack/lib/action_view/template/renderable.rb93
1 files changed, 93 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/template/renderable.rb b/actionpack/lib/action_view/template/renderable.rb
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+++ b/actionpack/lib/action_view/template/renderable.rb
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+# encoding: utf-8
+
+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 render(view, locals)
+ compile(locals)
+ view.send(method_name(locals), locals) {|*args| yield(*args) }
+ end
+
+ def load!
+ names = Base::CompiledTemplates.instance_methods.grep(/#{method_name_without_locals}/)
+ names.each do |name|
+ Base::CompiledTemplates.class_eval do
+ remove_method(name)
+ end
+ end
+ super
+ end
+
+ private
+
+ 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 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
+
+ # 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
+
+ private
+ 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.to_s, 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