Class: Landescape::Tokenizer

Inherits:
Object
  • Object
show all
Defined in:
lib/landescape/tokenizer.rb

Overview

Tokenize: “e[1;2fHi” to [‘e[1;2f’, ‘H’, ‘i’]]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source) ⇒ Tokenizer

Returns a new instance of Tokenizer.



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# File 'lib/landescape/tokenizer.rb', line 12

def initialize(source)
  @result = Queue.new
  @source =
    if source.respond_to?(:getc)
      source
    else
      StringIO.new(source.to_s)
    end

  at_exit do
    @source.close unless @source.closed?
  end
end

Instance Attribute Details

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/landescape/tokenizer.rb', line 10

def result
  @result
end

#source ⇒ Object (readonly)

Returns the value of attribute source.



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# File 'lib/landescape/tokenizer.rb', line 10

def source
  @source
end

Class Method Details

.start(source) ⇒ Object 



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

def start(source)
  new(source).tap(&:start)
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/landescape/tokenizer.rb', line 26

def start
  @tokenize_thread = Thread.fork {
    while char = read_char
      tokens =
        case char
        when nil  then Thread.exit # StringIO#getc # => nil (EOF)
        when /\e/ then escape char
        else char
        end

      Array(tokens).each do |token|
        result.push token
      end
    end
  }
end

#stop ⇒ Object 



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# File 'lib/landescape/tokenizer.rb', line 43

def stop
  @tokenize_thread.exit if @tokenize_thread.alive?
end