screenshot.rb

class OperaWatir::Screenshot

  attr_accessor :browser, :reply

  def initialize(parent)
    self.browser = parent.browser
    self.reply   = driver.saveScreenshot(2, [].to_java(:string))
  end

  def save(filename)
    File.open(filename, 'w') { |f| f.write(png) }
  end

  def blank?
    reply.isBlank
  end

  def png
    String.from_java_bytes(reply.getPng)
  end

  def md5
    reply.getMd5
  end

private

  def driver
    browser.driver
  end

end