Module: Rvim::Reformat

Defined in:
lib/rvim/reformat.rb

Class Method Summary collapse

Class Method Details

.wrap(lines, width) ⇒ Object

Word-wrap a sequence of lines to a column width. Treats every blank line as a paragraph separator: blank lines pass through and each non-blank chunk is rewrapped independently.



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# File 'lib/rvim/reformat.rb', line 8

def self.wrap(lines, width)
  return lines.dup if width.nil? || width <= 0

  out = []
  buffer = []
  lines.each do |line|
    if line.to_s.strip.empty?
      out.concat(wrap_paragraph(buffer, width)) unless buffer.empty?
      out << ''
      buffer = []
    else
      buffer << line
    end
  end
  out.concat(wrap_paragraph(buffer, width)) unless buffer.empty?
  out
end

.wrap_paragraph(lines, width) ⇒ Object 



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# File 'lib/rvim/reformat.rb', line 26

def self.wrap_paragraph(lines, width)
  text = lines.map(&:to_s).join(' ')
  words = text.split(/\s+/).reject(&:empty?)
  return [] if words.empty?

  result = []
  current = +''
  words.each do |w|
    if current.empty?
      current = w.dup
    elsif current.length + 1 + w.length <= width
      current << ' ' << w
    else
      result << current
      current = w.dup
    end
  end
  result << current unless current.empty?
  result
end