Class: Mapi::RTF::Converter

Inherits:
Object
  • Object
show all
Defined in:
lib/mapi/rtf.rb

Class Method Summary collapse

Class Method Details

.rtf2text(str, format = :text) ⇒ Object

this is pretty crap, its just to ensure there is always something readable if there is an rtf only body, with no html encapsulation.



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# File 'lib/mapi/rtf.rb', line 65

def self.rtf2text str, format=:text
  group = 0
  text = ''
  text << "<html>\n<body>" if format == :html
  group_type = []
  group_tags = []
  RTF::Tokenizer.process(StringIO.new(str)) do |a, b, c|
    add_text = ''
    case a
    when :open_group; group += 1; group_type[group] = nil; group_tags[group] = []
    when :close_group; group_tags[group].reverse.each { |t| text << "</#{t}>" }; group -= 1;
    when :control_word; # ignore
      group_type[group] ||= b
      # maybe change this to use utf8 where possible
      add_text = if b == 'par' || b == 'line' || b == 'page'; "\n"
      elsif b == 'tab' || b == 'cell'; "\t"
      elsif b == 'endash' || b == 'emdash'; "-"
      elsif b == 'emspace' || b == 'enspace' || b == 'qmspace'; " "
      elsif b == 'ldblquote'; '"'
      else ''
      end
      if b == 'b' || b == 'i' and format == :html
        close = c == 0 ? '/' : ''
        text << "<#{close}#{b}>"
        if c == 0
          group_tags[group].delete b
        else
          group_tags[group] << b
        end
      end
      # lot of other ones belong in here. =begin
\bullet   Bullet character.
\lquote   Left single quotation mark.
\rquote   Right single quotation mark.
\ldblquote  Left double quotation mark.
\rdblquote
=end
    when :control_symbol; # ignore
       group_type[group] ||= b
      add_text = ' ' if b == '~' # non-breakable space
      add_text = '-' if b == '_' # non-breakable hypen
    when :text
      add_text = b if group <= 1 or group_type[group] == 'rtlch' && !group_type[0...group].include?('*')
    end
    if format == :html
      text << add_text.gsub(/([<>&"'])/) do
        ent = { '<' => 'lt', '>' => 'gt', '&' => 'amp', '"' => 'quot', "'" => 'apos' }[$1]
        "&#{ent};"
      end
      text << '<br>' if add_text == "\n"
    else
      text << add_text
    end
  end
  text << "</body>\n</html>\n" if format == :html
  text
end