jiangchengfeiyi-xiaochengxu/node_modules/mathjs/lib/cjs/expression/node/ArrayNode.js

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.createArrayNode = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _is = require("../../utils/is.js");
var _array = require("../../utils/array.js");
var _factory = require("../../utils/factory.js");
const name = 'ArrayNode';
const dependencies = ['Node'];
const createArrayNode = exports.createArrayNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
  let {
    Node
  } = _ref;
  class ArrayNode extends Node {
    /**
     * @constructor ArrayNode
     * @extends {Node}
     * Holds an 1-dimensional array with items
     * @param {Node[]} [items]   1 dimensional array with items
     */
    constructor(items) {
      super();
      this.items = items || [];

      // validate input
      if (!Array.isArray(this.items) || !this.items.every(_is.isNode)) {
        throw new TypeError('Array containing Nodes expected');
      }
    }
    get type() {
      return name;
    }
    get isArrayNode() {
      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) {
      const evalItems = (0, _array.map)(this.items, function (item) {
        return item._compile(math, argNames);
      });
      const asMatrix = math.config.matrix !== 'Array';
      if (asMatrix) {
        const matrix = math.matrix;
        return function evalArrayNode(scope, args, context) {
          return matrix((0, _array.map)(evalItems, function (evalItem) {
            return evalItem(scope, args, context);
          }));
        };
      } else {
        return function evalArrayNode(scope, args, context) {
          return (0, _array.map)(evalItems, function (evalItem) {
            return evalItem(scope, args, context);
          });
        };
      }
    }

    /**
     * Execute a callback for each of the child nodes of this node
     * @param {function(child: Node, path: string, parent: Node)} callback
     */
    forEach(callback) {
      for (let i = 0; i < this.items.length; i++) {
        const node = this.items[i];
        callback(node, 'items[' + i + ']', this);
      }
    }

    /**
     * Create a new ArrayNode 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 {ArrayNode} Returns a transformed copy of the node
     */
    map(callback) {
      const items = [];
      for (let i = 0; i < this.items.length; i++) {
        items[i] = this._ifNode(callback(this.items[i], 'items[' + i + ']', this));
      }
      return new ArrayNode(items);
    }

    /**
     * Create a clone of this node, a shallow copy
     * @return {ArrayNode}
     */
    clone() {
      return new ArrayNode(this.items.slice(0));
    }

    /**
     * Get string representation
     * @param {Object} options
     * @return {string} str
     * @override
     */
    _toString(options) {
      const items = this.items.map(function (node) {
        return node.toString(options);
      });
      return '[' + items.join(', ') + ']';
    }

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

    /**
     * Instantiate an ArrayNode from its JSON representation
     * @param {Object} json  An object structured like
     *                       `{"mathjs": "ArrayNode", items: [...]}`,
     *                       where mathjs is optional
     * @returns {ArrayNode}
     */
    static fromJSON(json) {
      return new ArrayNode(json.items);
    }

    /**
     * Get HTML representation
     * @param {Object} options
     * @return {string} str
     * @override
     */
    _toHTML(options) {
      const items = this.items.map(function (node) {
        return node.toHTML(options);
      });
      return '<span class="math-parenthesis math-square-parenthesis">[</span>' + items.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-square-parenthesis">]</span>';
    }

    /**
     * Get LaTeX representation
     * @param {Object} options
     * @return {string} str
     */
    _toTex(options) {
      function itemsToTex(items, nested) {
        const mixedItems = items.some(_is.isArrayNode) && !items.every(_is.isArrayNode);
        const itemsFormRow = nested || mixedItems;
        const itemSep = itemsFormRow ? '&' : '\\\\';
        const itemsTex = items.map(function (node) {
          if (node.items) {
            return itemsToTex(node.items, !nested);
          } else {
            return node.toTex(options);
          }
        }).join(itemSep);
        return mixedItems || !itemsFormRow || itemsFormRow && !nested ? '\\begin{bmatrix}' + itemsTex + '\\end{bmatrix}' : itemsTex;
      }
      return itemsToTex(this.items, false);
    }
  }
  (0, _defineProperty2.default)(ArrayNode, "name", name);
  return ArrayNode;
}, {
  isClass: true,
  isNode: true
});