Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/nub/string.rb

Overview

Monkey patch string with some useful methods

Instance Method Summary collapse

Instance Method Details

#strip_color ⇒ Object

Strip the ansi color codes from the given string



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# File 'lib/nub/string.rb', line 51

def strip_color
  return self.gsub(/\e\[0;[39]\d;49m/, '').gsub(/\e\[0m/, '')
end

#to_ascii ⇒ Object

Convert the string to ascii, stripping out or converting all non-ascii characters



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# File 'lib/nub/string.rb', line 39

def to_ascii
  options = {
    :invalid => :replace,
    :undef => :replace,
    :replace => '',
    :universal_newline => true
  }
  return self.encode(Encoding.find('ASCII'), options)
end

#tokenize_color ⇒ Object

Tokenize the given colorized string



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# File 'lib/nub/string.rb', line 57

def tokenize_color
  tokens = []
  matches = self.to_enum(:scan, /\e\[0;[39]\d;49m(.*?[\s]*)\e\[0m/).map{Regexp.last_match}

  i, istart, iend = 0, 0, 0
  match = matches[i]
  while istart < self.size
    color = "39"
    iend = self.size
    token = self[istart..iend]

    # Current token is not a match
    if match && match.begin(0) != istart
      iend = match.begin(0)-1
      token = self[istart..iend]
      istart = iend + 1

    # Current token is a match
    elsif match && match.begin(0) == istart
      iend = match.end(0)
      token = match.captures.first
      color = match.to_s[/\e\[0;(\d+);49m.*/, 1]
      i += 1; match = matches[i]
      istart = iend

    # Ending
    else
      istart = iend
    end

    # Create token and advance
    tokens << ColorPair.new(token, color.to_i, ColorMap[color.to_i])
  end

  return tokens
end