Module: Wirb

Defined in:
lib/wirb/colors.rb,
lib/wirb/schema.rb,
lib/wirb/version.rb

Constant Summary collapse

COLORS = 
{
  :nothing      => '0;0',

  # light
  :black        => '0;30',
  :red          => '0;31',
  :green        => '0;32',
  :brown        => '0;33',
  :blue         => '0;34',
  :purple       => '0;35',
  :cyan         => '0;36',
  :light_gray   => '0;37',
  
  # bold
  :dark_gray    => '1;30',
  :light_red    => '1;31',
  :light_green  => '1;32',
  :yellow       => '1;33',
  :light_blue   => '1;34',
  :light_purple => '1;35',
  :light_cyan   => '1;36',
  :white        => '1;37',

  # underline
  :black_underline   => '4;30',
  :red_underline     => '4;31',
  :green_underline   => '4;32',
  :brown_underline   => '4;33',
  :blue_underline    => '4;34',
  :purple_underline  => '4;35',
  :cyan_underline    => '4;36',
  :white_underline   => '4;37',

  # background
  :black_background   => '7;30',
  :red_background     => '7;31',
  :green_background   => '7;32',
  :brown_background   => '7;33',
  :blue_background    => '7;34',
  :purple_background  => '7;35',
  :cyan_background    => '7;36',
  :white_background   => '7;37',
}
VERSION = 
'0.2.5'

Class Method Summary collapse

Class Method Details

.tokenize(str) ⇒ Object

This is an extended version of the original wirble tokenizer. Almost everyone would say that 300 lines long case statements need refactoring, but …sometimes it just doesn’t matter ;)



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# File 'lib/wirb/tokenizer.rb', line 5

def tokenize(str)
  raise ArgumentError, 'Tokenizer needs an inspect-string' unless str.is_a? String
  return enum_for(:tokenize, str) unless block_given?

  chars = str.split(//)

  @state, @token, i  =  [], '', 0
  @passed, snapshot  =  '', nil # exception handling

  # helpers
  pass_custom_state = lambda{ |kind, *options|
    yield kind, @token  unless @token.empty?
    @passed << @token
    @state.pop          if     options.include?(:remove)
    @token  = ''        unless options.include?(:keep_token)
    @repeat = true      if     options.include?(:repeat)
  }

  pass_state  = lambda{ |*options| pass_custom_state[ @state[-1], *options ] }

  pass        = lambda{ |kind, string| @passed << string; yield kind, string }
  
  set_state   = lambda{ |state| @state[-1] = state }

  get_state   = lambda{ |state| @state[-1] == state }

  get_previous_state =
                lambda{ |state| @state[-2] == state }

  push_state  = lambda{ |state, *options|
    @state << state
    @repeat = true if options.include? :repeat
  }

  pop_state   = lambda{ |*options|
    @state.pop
    @repeat = true if options.include? :repeat
  }

  # action!
  while i <= chars.size
    @repeat = false
    llc, lc, c, nc = lc, c, chars[i], chars[i+1]

    # warn "char = #{c}  state = #{@state*':'}"

    case @state[-1]
    when nil, :hash, :array, :enumerator, :set # "default" state
      case c
      when ':'      then push_state[:symbol]
      when '"'      then push_state[:string]
      when '/'      then push_state[:regexp]
      when '#'      then push_state[:object]
      when /[A-Z]/  then push_state[:class,    :repeat]
      when /[a-z]/  then push_state[:keyword,  :repeat]
      when /[0-9-]/ then push_state[:number,   :repeat]
      when '.'      then push_state[:range,    :repeat]
      when /\s/     then pass[:whitespace, c]
      when ','      then pass[:comma, ',']
      when '>'
        if lc == '='
          if get_state[:hash]
            pass[:refers, '=>']
          else # FIXME remove this buggy <=> cheat
            pass[:symbol, '=>']
          end
        end
      when '('
        if nc =~ /[0-9-]/
          push_state[:rational, :repeat]
        else
          push_state[:object_description, :repeat]
          open_brackets = 0
        end
 
      when '{'
        if get_state[:set]
          pass[:open_set, '{'];  push_state[nil]
        else
          pass[:open_hash, '{']; push_state[:hash]
        end

      when '['
        if get_state[:enumerator]
          pass[:open_enumerator, '[']; push_state[nil]
        else
          pass[:open_array, '['];      push_state[:array]
        end
        
      when ']'
        if get_state[:array]
          pass[:close_array, ']'];       pop_state[]
        elsif get_previous_state[:enumerator]
          pass[:close_enumerator, ']'];  pop_state[]
          set_state[:object_description]
        end

      when '}'
        if get_state[:hash]
          pass[:close_hash, '}'];  pop_state[]
        elsif get_previous_state[:set]
          pass[:close_set, '}'];   pop_state[]
          set_state[:object_description]
        end

      # else
      #   warn "ignoring char #{c.inspect}" if @debug
      end

    when :class
      case c
      when /[a-z0-9_]/i
        @token << c
      else
        if c ==':' && nc == ':'
          pass_state[]
          pass[:class_separator, '::']
        elsif !(c == ':' && lc == ':')
          pass_state[:remove, :repeat]
        end
      end

    when :symbol
      case c
      when /"/
        pass[:symbol_prefix, ':']
        set_state[:symbol_string]
        @token = ''
      when /[^"., }\])=]/
        @token << c
      else
        if c == ']' && lc == '['
          @token << c
        elsif c == '=' && nc != '>' # FIXME: spaceship error
          @token << c
        else
          pass[:symbol_prefix, ':']
          pass_state[:remove, :repeat]
        end
      end

    when :symbol_string
      if c == '"' && ( !( @token =~ /\\+$/; $& ) || $&.size % 2 == 0 ) # see string
        pass[:open_symbol_string, '"']
        pass_state[:remove]
        pop_state[]
        pass[:close_symbol_string, '"']
      else
        @token << c
      end

    when :string
      if c == '"' && ( !( @token =~ /\\+$/; $& ) || $&.size % 2 == 0 ) # allow escaping of " and
        pass[:open_string, '"']                                        # work around \\
        pass_state[:remove]
        pass[:close_string, '"']
      else
        @token << c
      end

    when :regexp
      if c == '/' && ( !( @token =~ /\\+$/; $& ) || $&.size % 2 == 0 ) # see string
        pass[:open_regexp, '/']
        pass_state[:remove]
        pass[:close_regexp, '/']
        push_state[:regexp_flags]
      else
        @token << c
      end

    when :regexp_flags
      if c =~ /[a-z]/i #*%w[m i x o n e u s]
        @token << c
      else
        pass_state[:remove, :repeat]
      end

    when :keyword
      if c =~ /[a-z0-9_]/i
        @token << c
        pass_custom_state[@token.to_sym, :remove] if %w[nil false true].include?(@token)
      else
        pass_state[:remove, :repeat]
      end

    when :number
      if c =~ /[0-9e+.-]/ && !(c == '.' && nc == '.')
        @token << c
      elsif c == '/' # ruby 1.8 mathn
        pass_state[]
        pass[:rational_separator, '/']
      else
        pass_state[:remove, :repeat]
      end

    when :range
      if c == '.'
        @token << c
      else
        pass_state[:remove, :repeat]
      end

    when :rational
      case c
      when '('
        pass[:open_rational, '(']
      when /[0-9-]/
        push_state[:number, :repeat]
      when '/', ','
        pass[:rational_separator, c]
      when ' '
        pass[:whitespace, c]
      when ')'
        pass[:close_rational, ')']
        pop_state[]
      end

    when :object
      case c
      when '<'
        pass[:open_object, '#<']
        push_state[:object_class]
        open_brackets = 0
      when '>'
        pass[:close_object, '>']
        pop_state[]; @token = ''
      end

    when :object_class
      case c
      when /[a-z0-9_]/i
        @token << c
      when '>'
        pass_state[:remove, :repeat]
      else
        if c == ':' && nc == ':'
          pass_state[]
          pass[:class_separator, '::']
        elsif !(c == ':' && lc == ':')
          pass_state[:keep_token]
          pass[:object_description_prefix, c]
          if %w[set].include? @token = @token.downcase
            set_state[@token.to_sym]
          else
            set_state[:object_description]
          end
          @token = ''
        end
      end

    when :object_description
      case c
      when '>', nil
        if open_brackets == 0
          pass_state[:remove, :repeat]
        else
          open_brackets -= 1
          @token << c
        end
      when '<'
        open_brackets += 1
        @token << c
      when '['
        pass_state[:repeat]
        set_state[:enumerator]
      when '"'
        pass_state[]
        push_state[:string]
      when /[0-9]/
        if c == '0' && nc == 'x'
          pass_state[:repeat]
          push_state[:object_addr]
        else
          # push_state[:number, :repeat]
          @token << c
        end
      else
        @token << c
      end

    when :object_addr
      if c =~ /[x0-9a-f]/
        @token << c
      else
        if c == '@'
          pass_state[:remove]
          push_state[:object_line]
          pass[:object_line_prefix, '@']
        else
          pass_state[:remove, :repeat]
        end
      end

     when :object_line
      if c == ':' && nc =~ /[0-9]/
        @token << ':'
        pass_state[:remove]
        push_state[:object_line_number]
      else
        @token << c
      end

    when :object_line_number
      if c =~ /[0-9]/
        @token << c
      else
        pass_state[:remove, :repeat]
      end
    
    # else
    #   raise "unknown state #{@state[-1]} #{@state.inspect}"
    end

    # next round :)
    if !@repeat
      i += 1
    elsif snapshot && Marshal.load(snapshot) == [@state, @token, llc, lc, c, nc] # loop protection
      raise 'Wirb Bug :/'
    end

    snapshot = Marshal.dump([@state, @token, llc, lc, c, nc])
  end
rescue
  # p$!, $!.backtrace[0]
  pass[:default, str.sub(@passed, '')]
end