Class: Dryml::DRYMLBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/dryml/dryml_builder.rb

Defined Under Namespace

Classes: Erubis

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(template) ⇒ DRYMLBuilder

Returns a new instance of DRYMLBuilder.



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# File 'lib/dryml/dryml_builder.rb', line 7

def initialize(template)
  @template = template
  @build_instructions = nil # set to [] on the first add_build_instruction
  @part_names = []
end

Instance Attribute Details

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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# File 'lib/dryml/dryml_builder.rb', line 13

def environment
  @environment
end

#template ⇒ Object (readonly)

Returns the value of attribute template.



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# File 'lib/dryml/dryml_builder.rb', line 13

def template
  @template
end

Instance Method Details

#<<(params) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 48

def <<(params)
  @build_instructions << params
end

#add_build_instruction(type, params) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 36

def add_build_instruction(type, params)
  @build_instructions << params.merge(:type => type)
end

#add_part(name, src, line_num) ⇒ Object

Raises:



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# File 'lib/dryml/dryml_builder.rb', line 41

def add_part(name, src, line_num)
  raise DrymlException.new("duplicate part: #{name}", template_path, line_num) if name.in?(@part_names)
  add_build_instruction(:def, :src => src, :line_num => line_num)
  @part_names << name
end

#build(local_names, auto_taglibs, src_mtime) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 112

def build(local_names, auto_taglibs, src_mtime)

  auto_taglibs.each { |t| import_taglib(t) }

  @build_instructions._?.each do |instruction|
    name = instruction[:name]
    case instruction[:type]
    when :eval
      @environment.class_eval(instruction[:src], template_path, instruction[:line_num])

    when :def
      src = erb_process(instruction[:src])
      @environment.class_eval(src, template_path, instruction[:line_num])

    when :render_page
      method_src = render_page_source(erb_process(instruction[:src]), local_names)
      @environment.compiled_local_names = local_names
      @environment.class_eval(method_src, template_path, instruction[:line_num])

    when :include
      import_taglib(instruction)

    when :module
      import_module(name.constantize, instruction[:as])

    when :alias_method
      @environment.send(:alias_method, instruction[:new], instruction[:old])

    else
      raise RuntimeError.new("DRYML: Unknown build instruction :#{instruction[:type]}, " +
                             "building #{template_path}")
    end
  end
  @last_build_mtime = src_mtime
end

#erb_process(erb_src) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 102

def erb_process(erb_src)
  trim_mode = ActionView::Template::Handlers::ERB.erb_trim_mode
  erb = Erubis.new(erb_src, :trim_mode => trim_mode)
  res = erb.src
  if res.respond_to? :force_encoding
    res.force_encoding(erb_src.encoding)
  end
  res
end

#import_module(mod, as = nil) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/dryml/dryml_builder.rb', line 163

def import_module(mod, as=nil)
  raise NotImplementedError if as
  @environment.send(:include, mod)
end

#import_taglib(options) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 149

def import_taglib(options)
  if options[:module]
    import_module(options[:module].constantize, options[:as])
  else
    template_dir = File.dirname(template_path)
    options = options.merge(:template_dir => template_dir, :source_template => template_path)

    Taglib.get(options).each do |taglib|
      taglib.import_into(@environment, options[:as])
    end
  end
end

#ready?(mtime, d = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dryml/dryml_builder.rb', line 25

def ready?(mtime, d=false)
  @build_instructions && @last_build_mtime && @last_build_mtime >= mtime
end

#render_page_source(src, local_names) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 53

def render_page_source(src, local_names)
  locals = local_names.map{|l| "#{l} = __local_assigns__[:#{l}];"}.join(' ')

  ("def render_page(__page_this__, __local_assigns__); " +
        "#{locals} new_object_context(__page_this__) do " +
        src +
       "; output_buffer; end; end")
end

#set_environment(environment) ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 20

def set_environment(environment)
  @environment = environment
end

#start ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 30

def start
  @part_names.clear
  @build_instructions = []
end

#template_path ⇒ Object 



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# File 'lib/dryml/dryml_builder.rb', line 15

def template_path
  template.template_path
end