method

pretty

Ruby latest stable (v2_5_5) - 0 notes - Class: Util

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What's this?

pretty(string, shift = " ") public

Prettify (indent) an HTML string.

string is the HTML string to indent. shift is the indentation unit to use; it defaults to two spaces.

print CGI::pretty("<HTML><BODY></BODY></HTML>")
  # <HTML>
  #   <BODY>
  #   </BODY>
  # </HTML>

print CGI::pretty("<HTML><BODY></BODY></HTML>", "\t")
  # <HTML>
  #         <BODY>
  #         </BODY>
  # </HTML>

Show source

# File lib/cgi/util.rb, line 211
  def pretty(string, shift = "  ")
    lines = string.gsub(/(?!\A)<.*?>/, "\n\\0").gsub(/<.*?>(?!\n)/, "\\0\n")
    end_pos = 0
    while end_pos = lines.index(/^<\/(\w+)/, end_pos)
      element = $1.dup
      start_pos = lines.rindex(/^\s*<#{element}/, end_pos)
      lines[start_pos ... end_pos] = "__" + lines[start_pos ... end_pos].gsub(/\n(?!\z)/, "\n" + shift) + "__"
    end
    lines.gsub(/^((?:#{Regexp::quote(shift)})*)__(?=<\/?\w)/, '\1')
  end

pretty

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