text: // Copyright 2015 Volker Sorge
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  
  /**
   * @fileoverview Class highlighting CSS elements.
   *
   * @author volker.sorge@gmail.com (Volker Sorge)
   */
  
  goog.provide('sre.CssHighlighter');
  
  goog.require('sre.AbstractHighlighter');
  
  
  
  /**
   * @constructor
   * @extends {sre.AbstractHighlighter}
   */
  sre.CssHighlighter = function() {
    sre.CssHighlighter.base(this, 'constructor');
  
    this.mactionName = 'mjx-maction';
  };
  goog.inherits(sre.CssHighlighter, sre.AbstractHighlighter);
  
  
  /**
   * @override
   */
  sre.CssHighlighter.prototype.highlightNode = function(node) {
    var info = {node: node,
      background: node.style.backgroundColor,
      foreground: node.style.color};
    var color = this.colorString();
    node.style.backgroundColor = color.background;
    node.style.color = color.foreground;
    return info;
  };
  
  
  /**
   * @override
   */
  sre.CssHighlighter.prototype.unhighlightNode = function(info) {
    info.node.style.backgroundColor = info.background;
    info.node.style.color = info.foreground;
  };
  