class Diff::LCS::HTMLDiff

Constants

DEFAULT_CSS
DEFAULT_OPTIONS

Attributes

options[R]

Public Class Methods

new(left, right, options = nil) click to toggle source
# File lib/diff/lcs/htmldiff.rb, line 88
def initialize(left, right, options = nil)
  @left     = left
  @right    = right
  @options  = options

  @options = DEFAULT_OPTIONS.dup if @options.nil?
end

Public Instance Methods

run() click to toggle source
# File lib/diff/lcs/htmldiff.rb, line 110
  def run
    verify_options

    if @options[:expand_tabs] > 0 && self.class.can_expand_tabs
      formatter = Text::Format.new
      formatter.tabstop = @options[:expand_tabs]

      @left = left.map { |line| formatter.expand(line.chomp) }
      @right = right.map { |line| formatter.expand(line.chomp) }
    end

    @left.map! { |line| CGI.escapeHTML(line.chomp) }
    @right.map! { |line| CGI.escapeHTML(line.chomp) }

    @options[:output] << <<-OUTPUT
<html>
  <head>
    <title>#{@options[:title]}</title>
    <style type="text/css">
    #{@options[:css]}
    </style>
  </head>
  <body>
    <h1>#{@options[:title]}</h1>
    <p>Legend: <span class="only_a">Only in Old</span>&nbsp;
    <span class="only_b">Only in New</span></p>
    <div class="diff">
    OUTPUT

    callbacks = Callbacks.new(@options[:output])
    Diff::LCS.traverse_sequences(@left, @right, callbacks)

    @options[:output] << <<-OUTPUT
    </div>
  </body>
</html>
    OUTPUT
  end