Method: X11::Form::BaseForm#to_packet

Defined in:
lib/X11/form.rb

#to_packet(dpy) ⇒ Object 



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# File 'lib/X11/form.rb', line 47

def to_packet(dpy)
  # fetch class level instance variable holding defined fields
  structs = self.class.structs

  structs.map do |s|
    # fetch value of field set in initialization

    value = s.type == :unused ? nil : instance_variable_get("@#{s.name}")
    case s.type
    when :field
      if s.value
        if s.value.respond_to?(:call)
          value = s.value.call(self)
        else
          value = s.value
        end
      end
      #p [s,value]

      if value.is_a?(BaseForm)
        v = value.to_packet(dpy)
      else
        #p [s,value]
        v = s.type_klass.pack(value, dpy)
      end
      #p v
      v
    when :unused
      sz = s.size.respond_to?(:call) ? s.size.call(self) : s.size
      "\x00" * sz
    when :length, :format_length
      #p [s,value]
      #p [value.size]
      s.type_klass.pack(value.size, dpy)
    when :string
      s.type_klass.pack(value, dpy)
    when :list
      Array(value).collect do |obj|
        if obj.is_a?(BaseForm)
          obj.to_packet(dpy)
        else
          s.type_klass.pack(obj, dpy)
        end
      end
    end
  end.join
end