Module: WithKnowledgeOfColor

Included in:
String
Defined in:
lib/quality_extensions/string/with_knowledge_of_color.rb

Constant Summary collapse

Color_regexp = 
/\e\[[^m]+m/

Instance Method Summary collapse

Instance Method Details

#length_without_color ⇒ Object

This version of length takes into account the fact that the ANSI color codes themselves don’t take up any space to display on the screen. So this returns the number of characters wide the string is when it is actually printed to the screen.



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# File 'lib/quality_extensions/string/with_knowledge_of_color.rb', line 19

def length_without_color
  strip_color.length
end

#ljust_with_color(width, padstr = ' ') ⇒ Object 



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# File 'lib/quality_extensions/string/with_knowledge_of_color.rb', line 27

def ljust_with_color(width, padstr=' ')
  #ljust(width + nonprinting_characters_used_for_color.length, padstr)
  # That didn't work when you wanted the padstr to have color (as in ' '.on_blue)

  padding_width = [(width - length_without_color), 0].max
  self + padstr*padding_width
end

#nonprinting_characters_used_for_color ⇒ Object 



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# File 'lib/quality_extensions/string/with_knowledge_of_color.rb', line 23

def nonprinting_characters_used_for_color
  self.scan(Color_regexp).join
end

#rjust_with_color(width, padstr = ' ') ⇒ Object 



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# File 'lib/quality_extensions/string/with_knowledge_of_color.rb', line 35

def rjust_with_color(width, padstr=' ')
  padding_width = [(width - length_without_color), 0].max
  padstr*padding_width + self
end

#strip_color ⇒ Object 



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# File 'lib/quality_extensions/string/with_knowledge_of_color.rb', line 13

def strip_color
  gsub(Color_regexp, '')
end