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Class: RSS::Converter

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, Utils
Inherits: Object
Defined in: lib/rss/converter.rb

Class Method Summary

Instance Method Summary

Utils - Included

#element_initialize_arguments?

This method is used inside of several different objects to determine if special behavior is needed in the constructor.
#get_file_and_line_from_caller

Returns an array of two elements: the filename where the calling method is located, and the line number where it is defined.
#h,
#html_escape

Takes a string s with some HTML in it, and escapes ‘&’, ‘“’, ‘<’ and ‘>’, by replacing them with the appropriate entities.
#new_with_value_if_need

If value is an instance of class klass, return it, else create a new instance of klass with value value.
#to_class_name

Given a name in a name_with_underscores or a name-with-dashes format, returns the CamelCase version of name.

Constructor Details

.new(to_enc, from_enc = nil) ⇒ Converter

[ GitHub ] 

  


# File 'lib/rss/converter.rb', line 10



def initialize(to_enc, from_enc=nil)
  if "".respond_to?(:encode)
    @to_encoding = to_enc
    return
  end
  normalized_to_enc = to_enc.downcase.gsub(/-/, '_')
  from_enc ||= 'utf-8'
  normalized_from_enc = from_enc.downcase.gsub(/-/, '_')
  if normalized_to_enc == normalized_from_enc
    def_same_enc()
  else
    def_diff_enc = "def_to_#{normalized_to_enc}_from_#{normalized_from_enc}"
    if respond_to?(def_diff_enc)
      __send__(def_diff_enc)
    else
      def_else_enc(to_enc, from_enc)
    end
  end
end


  







Instance Method Details



  

    #convert(value)  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 30



def convert(value)
  if value.is_a?(String) and value.respond_to?(:encode)
    value.encode(@to_encoding)
  else
    value
  end
end


  








  

    #def_convert(depth = 0)  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 38



def def_convert(depth=0)
  instance_eval(<<-EOC, *get_file_and_line_from_caller(depth))
  def convert(value)
    if value.kind_of?(String)
      #{yield('value')}
    else
      value
    end
  end
  EOC
end


  








  

    #def_else_enc(to_enc, from_enc)  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 68



def def_else_enc(to_enc, from_enc)
  def_iconv_convert(to_enc, from_enc, 0)
end


  








  

    #def_iconv_convert(to_enc, from_enc, depth = 0)  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 50



def def_iconv_convert(to_enc, from_enc, depth=0)
  begin
    require "iconv"
    @iconv = Iconv.new(to_enc, from_enc)
    def_convert(depth+1) do |value|
      <<-EOC
      begin
        @iconv.iconv(#{value})
      rescue Iconv::Failure
        raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}")
      end
      EOC
    end
  rescue LoadError, ArgumentError, SystemCallError
    raise UnknownConversionMethodError.new(to_enc, from_enc)
  end
end


  








  

    #def_same_enc  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 72



def def_same_enc()
  def_convert do |value|
    value
  end
end


  








  

    #def_to_euc_jp_from_iso_2022_jp  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 132



def def_to_euc_jp_from_iso_2022_jp
  require "nkf"
  def_convert do |value|
    "NKF.nkf('-Je', #{value})"
  end
end


  








  

    #def_to_euc_jp_from_shift_jis  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 118



def def_to_euc_jp_from_shift_jis
  require "nkf"
  def_convert do |value|
    "NKF.nkf('-Se', #{value})"
  end
end


  








  

    #def_to_euc_jp_from_utf_8  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 102



def def_to_euc_jp_from_utf_8
  def_uconv_convert_if_can('u8toeuc', 'EUC-JP', 'UTF-8', '-We')
end


  








  

    #def_to_iso_2022_jp_from_euc_jp  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 139



def def_to_iso_2022_jp_from_euc_jp
  require "nkf"
  def_convert do |value|
    "NKF.nkf('-Ej', #{value})"
  end
end


  








  

    #def_to_iso_8859_1_from_utf_8  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 152



def def_to_iso_8859_1_from_utf_8
  def_convert do |value|
    <<-EOC
    array_utf8 = #{value}.unpack('U*')
    array_enc = []
    array_utf8.each do |num|
      if num <= 0xFF
        array_enc << num
      else
        array_enc.concat "&\#\#{num};".unpack('C*')
      end
    end
    array_enc.pack('C*')
    EOC
  end
end


  








  

    #def_to_shift_jis_from_euc_jp  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 125



def def_to_shift_jis_from_euc_jp
  require "nkf"
  def_convert do |value|
    "NKF.nkf('-Es', #{value})"
  end
end


  








  

    #def_to_shift_jis_from_utf_8  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 110



def def_to_shift_jis_from_utf_8
  def_uconv_convert_if_can('u8tosjis', 'Shift_JIS', 'UTF-8', '-Ws')
end


  








  

    #def_to_utf_8_from_euc_jp  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 106



def def_to_utf_8_from_euc_jp
  def_uconv_convert_if_can('euctou8', 'UTF-8', 'EUC-JP', '-Ew')
end


  








  

    #def_to_utf_8_from_iso_8859_1  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 146



def def_to_utf_8_from_iso_8859_1
  def_convert do |value|
    "#{value}.unpack('C*').pack('U*')"
  end
end


  








  

    #def_to_utf_8_from_shift_jis  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 114



def def_to_utf_8_from_shift_jis
  def_uconv_convert_if_can('sjistou8', 'UTF-8', 'Shift_JIS', '-Sw')
end


  








  

    #def_uconv_convert_if_can(meth, to_enc, from_enc, nkf_arg)  
  

  [ GitHub ]


  

  


# File 'lib/rss/converter.rb', line 78



def def_uconv_convert_if_can(meth, to_enc, from_enc, nkf_arg)
  begin
    require "uconv"
    def_convert(1) do |value|
      <<-EOC
      begin
        Uconv.#{meth}(#{value})
      rescue Uconv::Error
        raise ConversionError.new(#{value}, "#{to_enc}", "#{from_enc}")
      end
      EOC
    end
  rescue LoadError
    require 'nkf'
    if NKF.const_defined?(:UTF8)
      def_convert(1) do |value|
        "NKF.nkf(#{nkf_arg.dump}, #{value})"
      end
    else
      def_iconv_convert(to_enc, from_enc, 1)
    end
  end
end