text: /**
   * Copyright 2013-2014, Facebook, Inc.
   * All rights reserved.
   *
   * This source code is licensed under the BSD-style license found in the
   * LICENSE file in the root directory of this source tree. An additional grant
   * of patent rights can be found in the PATENTS file in the same directory.
   */
  /*global exports:true*/
  "use strict";
  
  var Syntax = require('jstransform').Syntax;
  var utils = require('jstransform/src/utils');
  
  function addDisplayName(displayName, object, state) {
    if (object &&
        object.type === Syntax.CallExpression &&
        object.callee.type === Syntax.MemberExpression &&
        object.callee.object.type === Syntax.Identifier &&
        object.callee.object.name === 'React' &&
        object.callee.property.type === Syntax.Identifier &&
        object.callee.property.name === 'createClass' &&
        object['arguments'].length === 1 &&
        object['arguments'][0].type === Syntax.ObjectExpression) {
      // Verify that the displayName property isn't already set
      var properties = object['arguments'][0].properties;
      var safe = properties.every(function(property) {
        var value = property.key.type === Syntax.Identifier ?
          property.key.name :
          property.key.value;
        return value !== 'displayName';
      });
  
      if (safe) {
        utils.catchup(object['arguments'][0].range[0] + 1, state);
        utils.append('displayName: "' + displayName + '",', state);
      }
    }
  }
  
  /**
   * Transforms the following:
   *
   * var MyComponent = React.createClass({
   *    render: ...
   * });
   *
   * into:
   *
   * var MyComponent = React.createClass({
   *    displayName: 'MyComponent',
   *    render: ...
   * });
   *
   * Also catches:
   *
   * MyComponent = React.createClass(...);
   * exports.MyComponent = React.createClass(...);
   * module.exports = {MyComponent: React.createClass(...)};
   */
  function visitReactDisplayName(traverse, object, path, state) {
    var left, right;
  
    if (object.type === Syntax.AssignmentExpression) {
      left = object.left;
      right = object.right;
    } else if (object.type === Syntax.Property) {
      left = object.key;
      right = object.value;
    } else if (object.type === Syntax.VariableDeclarator) {
      left = object.id;
      right = object.init;
    }
  
    if (left && left.type === Syntax.MemberExpression) {
      left = left.property;
    }
    if (left && left.type === Syntax.Identifier) {
      addDisplayName(left.name, right, state);
    }
  }
  
  visitReactDisplayName.test = function(object, path, state) {
      return (
        object.type === Syntax.AssignmentExpression ||
        object.type === Syntax.Property ||
        object.type === Syntax.VariableDeclarator
      );
  };
  
  exports.visitorList = [
    visitReactDisplayName
  ];
  