Contents

require "nyanko/invoker/options"
require "nyanko/invoker/function_finder"

module Nyanko
  module Invoker
    def invoke(*args, &block)
      options = Options.new(*args)
      defaults_stack << block
      unit_locals_stack << options.locals
      function = FunctionFinder.find(self, options)
      result   = function.invoke(self, options.invoke_options)
      result   = surround_with_html_tag(result, function, options) if view?
      result
    rescue Exception => exception
      ExceptionHandler.handle(exception)
      run_default
    ensure
      defaults_stack.pop
      unit_locals_stack.pop
    end

    def units
      @units ||= []
    end

    def view?
      is_a?(ActionView::Base)
    end

    def run_default
      if block = defaults_stack.last
        if view?
          capture(&block)
        else
          instance_exec(&block)
        end
      end
    end

    private

    # Search shared method or locals variable
    def method_missing(method_name, *args, &block)
      if (methods = units.last.try(:shared_methods)) && block = methods[method_name]
        self.instance_exec(*args, &block)
      elsif args.empty? && value = (unit_locals_stack.last || {})[method_name]
        value
      else
        super
      end
    end

    def defaults_stack
      @defaults_stack ||= []
    end

    def unit_locals_stack
      @unit_locals_stack ||= []
    end

    def surround_with_html_tag(str, function, options)
      case options.type
      when :plain
        str
      when :inline
        content_tag(:span, str, :class => function.css_classes)
      else
        content_tag(:div, str, :class => function.css_classes)
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
nyanko-0.0.5	lib/nyanko/invoker.rb