ysjj-system/node_modules/mathjs/lib/esm/expression/node/AccessorNode.js

import _defineProperty from "@babel/runtime/helpers/defineProperty";
import { isAccessorNode, isArrayNode, isConstantNode, isFunctionNode, isIndexNode, isNode, isObjectNode, isParenthesisNode, isSymbolNode } from '../../utils/is.js';
import { getSafeProperty } from '../../utils/customs.js';
import { factory } from '../../utils/factory.js';
import { accessFactory } from './utils/access.js';
var name = 'AccessorNode';
var dependencies = ['subset', 'Node'];
export var createAccessorNode = /* #__PURE__ */factory(name, dependencies, _ref => {
  var {
    subset,
    Node
  } = _ref;
  var access = accessFactory({
    subset
  });

  /**
   * Are parenthesis needed?
   * @private
   */
  function needParenthesis(node) {
    // TODO: maybe make a method on the nodes which tells whether they need parenthesis?
    return !(isAccessorNode(node) || isArrayNode(node) || isConstantNode(node) || isFunctionNode(node) || isObjectNode(node) || isParenthesisNode(node) || isSymbolNode(node));
  }
  class AccessorNode extends Node {
    /**
     * @constructor AccessorNode
     * @extends {Node}
     * Access an object property or get a matrix subset
     *
     * @param {Node} object                 The object from which to retrieve
     *                                      a property or subset.
     * @param {IndexNode} index             IndexNode containing ranges
     */
    constructor(object, index) {
      super();
      if (!isNode(object)) {
        throw new TypeError('Node expected for parameter "object"');
      }
      if (!isIndexNode(index)) {
        throw new TypeError('IndexNode expected for parameter "index"');
      }
      this.object = object;
      this.index = index;
    }

    // readonly property name
    get name() {
      if (this.index) {
        return this.index.isObjectProperty() ? this.index.getObjectProperty() : '';
      } else {
        return this.object.name || '';
      }
    }
    get type() {
      return name;
    }
    get isAccessorNode() {
      return true;
    }

    /**
     * Compile a node into a JavaScript function.
     * This basically pre-calculates as much as possible and only leaves open
     * calculations which depend on a dynamic scope with variables.
     * @param {Object} math     Math.js namespace with functions and constants.
     * @param {Object} argNames An object with argument names as key and `true`
     *                          as value. Used in the SymbolNode to optimize
     *                          for arguments from user assigned functions
     *                          (see FunctionAssignmentNode) or special symbols
     *                          like `end` (see IndexNode).
     * @return {function} Returns a function which can be called like:
     *                        evalNode(scope: Object, args: Object, context: *)
     */
    _compile(math, argNames) {
      var evalObject = this.object._compile(math, argNames);
      var evalIndex = this.index._compile(math, argNames);
      if (this.index.isObjectProperty()) {
        var prop = this.index.getObjectProperty();
        return function evalAccessorNode(scope, args, context) {
          // get a property from an object evaluated using the scope.
          return getSafeProperty(evalObject(scope, args, context), prop);
        };
      } else {
        return function evalAccessorNode(scope, args, context) {
          var object = evalObject(scope, args, context);
          // we pass just object here instead of context:
          var index = evalIndex(scope, args, object);
          return access(object, index);
        };
      }
    }

    /**
     * Execute a callback for each of the child nodes of this node
     * @param {function(child: Node, path: string, parent: Node)} callback
     */
    forEach(callback) {
      callback(this.object, 'object', this);
      callback(this.index, 'index', this);
    }

    /**
     * Create a new AccessorNode whose children are the results of calling
     * the provided callback function for each child of the original node.
     * @param {function(child: Node, path: string, parent: Node): Node} callback
     * @returns {AccessorNode} Returns a transformed copy of the node
     */
    map(callback) {
      return new AccessorNode(this._ifNode(callback(this.object, 'object', this)), this._ifNode(callback(this.index, 'index', this)));
    }

    /**
     * Create a clone of this node, a shallow copy
     * @return {AccessorNode}
     */
    clone() {
      return new AccessorNode(this.object, this.index);
    }

    /**
     * Get string representation
     * @param {Object} options
     * @return {string}
     */
    _toString(options) {
      var object = this.object.toString(options);
      if (needParenthesis(this.object)) {
        object = '(' + object + ')';
      }
      return object + this.index.toString(options);
    }

    /**
     * Get HTML representation
     * @param {Object} options
     * @return {string}
     */
    toHTML(options) {
      var object = this.object.toHTML(options);
      if (needParenthesis(this.object)) {
        object = '<span class="math-parenthesis math-round-parenthesis">(</span>' + object + '<span class="math-parenthesis math-round-parenthesis">)</span>';
      }
      return object + this.index.toHTML(options);
    }

    /**
     * Get LaTeX representation
     * @param {Object} options
     * @return {string}
     */
    _toTex(options) {
      var object = this.object.toTex(options);
      if (needParenthesis(this.object)) {
        object = '\\left(\' + object + \'\\right)';
      }
      return object + this.index.toTex(options);
    }

    /**
     * Get a JSON representation of the node
     * @returns {Object}
     */
    toJSON() {
      return {
        mathjs: name,
        object: this.object,
        index: this.index
      };
    }

    /**
     * Instantiate an AccessorNode from its JSON representation
     * @param {Object} json
     *     An object structured like
     *     `{"mathjs": "AccessorNode", object: ..., index: ...}`,
     *     where mathjs is optional
     * @returns {AccessorNode}
     */
    static fromJSON(json) {
      return new AccessorNode(json.object, json.index);
    }
  }
  _defineProperty(AccessorNode, "name", name);
  return AccessorNode;
}, {
  isClass: true,
  isNode: true
});