Class: String

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

Constant Summary collapse

ANSI_ESCAPE_SEQUENCE_RX = 
/\e([#{Regexp::escape prefix}]?)([0-9;\{\?\}]*)([0-#{Regexp::escape 176.chr}])/

Instance Method Summary collapse

Instance Method Details

#ansi_sequences ⇒ Object

returns an array listing all detected ANSI sequences in self. These are instances of ANSI::Code.



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# File 'lib/core_ext/string.rb', line 6

def ansi_sequences
  ANSI_ESCAPE_SEQUENCE_RX.each_match(self).collect do |match|
    ANSI.recognize(match[0])
  end
end

#replace_ansi ⇒ Object

Creates a new String that is a copy of this String. Takes a block which will receive each occurrance of an ANSI escape sequence; the escape sequence is replaced by the return value of the block.

Example:

ANSI.red { "hello" }.replace_ansi do |match|
  case match
    when RED then "(red)"
    when RESET_COLOR then "(normal)"
  end
end
#=> "(red)hello(normal)"



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# File 'lib/core_ext/string.rb', line 25

def replace_ansi
  copy = self.dup
  ANSI_ESCAPE_SEQUENCE_RX.each_match(copy).collect do |match|
    ansi_match = ANSI.recognize(match[0])
    result = yield ansi_match
    copy.gsub!(match[0], result)
  end
  copy
end