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 }); /** * @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 */ function AccessorNode(object, index) { if (!(this instanceof AccessorNode)) { throw new SyntaxError('Constructor must be called with the new operator'); } 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 || null; this.index = index; // readonly property name Object.defineProperty(this, 'name', { get: function () { if (this.index) { return this.index.isObjectProperty() ? this.index.getObjectProperty() : ''; } else { return this.object.name || ''; } }.bind(this), set: function set() { throw new Error('Cannot assign a new name, name is read-only'); } }); } AccessorNode.prototype = new Node(); AccessorNode.prototype.type = 'AccessorNode'; AccessorNode.prototype.isAccessorNode = 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: *) */ AccessorNode.prototype._compile = function (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); var index = evalIndex(scope, args, object); // we pass object here instead of context 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 */ AccessorNode.prototype.forEach = function (callback) { callback(this.object, 'object', this); callback(this.index, 'index', this); }; /** * Create a new AccessorNode having it's childs be the results of calling * the provided callback function for each of the childs of the original node. * @param {function(child: Node, path: string, parent: Node): Node} callback * @returns {AccessorNode} Returns a transformed copy of the node */ AccessorNode.prototype.map = function (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} */ AccessorNode.prototype.clone = function () { return new AccessorNode(this.object, this.index); }; /** * Get string representation * @param {Object} options * @return {string} */ AccessorNode.prototype._toString = function (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} */ AccessorNode.prototype.toHTML = function (options) { var object = this.object.toHTML(options); if (needParenthesis(this.object)) { object = '(' + object + ')'; } return object + this.index.toHTML(options); }; /** * Get LaTeX representation * @param {Object} options * @return {string} */ AccessorNode.prototype._toTex = function (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} */ AccessorNode.prototype.toJSON = function () { return { mathjs: 'AccessorNode', 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} */ AccessorNode.fromJSON = function (json) { return new AccessorNode(json.object, json.index); }; /** * 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)); } return AccessorNode; }, { isClass: true, isNode: true });