Class: Utility

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

Class Method Summary collapse

Class Method Details

.wrap_text(text, width, indent = 0, option = :all) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/utility.rb', line 3

def self.wrap_text(text, width, indent = 0, option = :all)
  raise ArgumentError.new("Width must be at least 1 character wide.") if width <= 1
  raise ArgumentError.new("Indent must be 0 for no indenting or a positive number.") if indent < 0
  raise ArgumentError.new("Wrapping width must be greater than the indent amount.") if width <= indent
  lines = []
  
  curline = nil
  indent_text = " " * indent
  text.split.each do |word|
    if (curline == nil)
      # start a new line
      curline = ""
      curline << indent_text if ( (option == :all) || (option == :indent && lines.count == 0) || (option == :outdent && lines.count > 0) )
      curline << word << " "
    elsif (curline.length + word.length <= width)
      curline << word << " "
    else
      lines << curline.chop
      curline = nil
      redo
    end
    
  end
  lines << curline.chop if curline
  lines.join("\n").chomp  
end