Module: Clive::Output

Extended by:
Output
Included in:
Output
Defined in:
lib/clive/output.rb

Constant Summary collapse

TERMINAL_WIDTH =

If the terminal width can’t be determined use a sensible default value

80

Instance Method Summary collapse

Instance Method Details

#pad(str, len, with = " ") ⇒ Object

Parameters:

  • str (String) —

    String to pad.

  • len (Integer) —

    Length to pad string to.

  • with (String) (defaults to: " ") —

    String to add to str.



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# File 'lib/clive/output.rb', line 10

def pad(str, len, with=" ")
  diff = len - str.clear_colours.size
  str += with * diff unless diff < 0
  str
end

#terminal_width ⇒ Integer?

Returns Width of terminal window, or nil if it cannot be determined.

Returns:

  • (Integer, nil) —

    Width of terminal window, or nil if it cannot be determined.

See Also:



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# File 'lib/clive/output.rb', line 63

def terminal_width
  if (ENV['COLUMNS'] =~ /^\d+$/)
    ENV['COLUMNS'].to_i
  elsif (RUBY_PLATFORM =~ /java/ || (!STDIN.tty? && ENV['TERM'])) && command_exists?('tput')
    `tput cols`.to_i
  elsif STDIN.tty? && command_exists?('stty')
    # returns 'height width'
    `stty size`.scan(/\d+/).last.to_i
  else
    TERMINAL_WIDTH
  end
rescue
  TERMINAL_WIDTH
end

#wrap_text(str, left_margin, width) ⇒ Object

Wraps text. Each line is split by word and then a newline is inserted when the words exceed the allowed width. Lines after the first will have left_margin spaces inserted.

Examples:


Clive::Output.wrap_text("Lorem ipsum dolor sit amet, consectetur 
adipisicing elit, sed do eiusmod tempor incididunt ut labore et 
dolore magna aliqua.", 4, 24)
#=> "Lorem ipsum dolor
#    sit amet,
#    consectetur
#    adipisicing elit,
#    sed do eiusmod
#    tempor incididunt ut
#    labore et dolore
#    magna aliqua."

Parameters:

  • str (String) —

    Text to be wrapped

  • left_margin (Integer) —

    Width of space at left

  • width (Integer) —

    Total width of text, ie. from the left of the screen



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# File 'lib/clive/output.rb', line 38

def wrap_text(str, left_margin, width)
  text_width = width - left_margin
  
  words = str.split(" ")
  r = [""]
  i = 0
  
  words.each do |word|
    if (r[i] + word).clear_colours.size < text_width
      r[i] << " " << word
    else
      i += 1
      r[i] = word
    end
  end
  
  # Clean up strings
  r.map! {|i| i.strip }
  
  ([r[0]] + r[1..-1].map {|i| l_pad(i, left_margin) }).join("\n")
end