goog.debug.DevCss = function()

in asdoc/library/closure/goog/debug/devcss/devcss.js [48:113]

• 40 lines of code
• 19 McCabe index (conditional complexity)

goog.debug.DevCss = function(opt_userAgent, opt_userAgentVersion) {
  if (!opt_userAgent) {
    // Walks through the known goog.userAgents.
    if (goog.userAgent.IE) {
      opt_userAgent = goog.debug.DevCss.UserAgent.IE;
    } else if (goog.userAgent.GECKO) {
      opt_userAgent = goog.debug.DevCss.UserAgent.GECKO;
    } else if (goog.userAgent.WEBKIT) {
      opt_userAgent = goog.debug.DevCss.UserAgent.WEBKIT;
    } else if (goog.userAgent.MOBILE) {
      opt_userAgent = goog.debug.DevCss.UserAgent.MOBILE;
    } else if (goog.userAgent.OPERA) {
      opt_userAgent = goog.debug.DevCss.UserAgent.OPERA;
    } else if (goog.userAgent.EDGE) {
      opt_userAgent = goog.debug.DevCss.UserAgent.EDGE;
    }
  }
  switch (opt_userAgent) {
    case goog.debug.DevCss.UserAgent.OPERA:
    case goog.debug.DevCss.UserAgent.IE:
    case goog.debug.DevCss.UserAgent.GECKO:
    case goog.debug.DevCss.UserAgent.FIREFOX:
    case goog.debug.DevCss.UserAgent.WEBKIT:
    case goog.debug.DevCss.UserAgent.SAFARI:
    case goog.debug.DevCss.UserAgent.MOBILE:
    case goog.debug.DevCss.UserAgent.EDGE:
      break;
    default:
      throw new Error(
          'Could not determine the user agent from known UserAgents');
  }

  /**
   * One of goog.debug.DevCss.UserAgent.
   * @type {string}
   * @private
   */
  this.userAgent_ = opt_userAgent;

  /**
   * @const @private
   */
  this.userAgentTokens_ = {};

  /**
   * @type {number|string}
   * @private
   */
  this.userAgentVersion_ = opt_userAgentVersion || goog.userAgent.VERSION;
  this.generateUserAgentTokens_();

  /**
   * @type {boolean}
   * @private
   */
  this.isIe6OrLess_ = this.userAgent_ == goog.debug.DevCss.UserAgent.IE &&
      goog.string.compareVersions('7', this.userAgentVersion_) > 0;

  if (this.isIe6OrLess_) {
    /**
     * @type {Array<{classNames,combinedClassName,els}>}
     * @private
     */
    this.ie6CombinedMatches_ = [];
  }
};