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

import _defineProperty from "@babel/runtime/helpers/defineProperty";
import { map } from '../../utils/array.js';
import { getSafeProperty } from '../../utils/customs.js';
import { factory } from '../../utils/factory.js';
import { isArray, isConstantNode, isMatrix, isNode, isString, typeOf } from '../../utils/is.js';
import { escape } from '../../utils/string.js';
var name = 'IndexNode';
var dependencies = ['Node', 'size'];
export var createIndexNode = /* #__PURE__ */factory(name, dependencies, _ref => {
  var {
    Node,
    size
  } = _ref;
  class IndexNode extends Node {
    /**
     * @constructor IndexNode
     * @extends Node
     *
     * Describes a subset of a matrix or an object property.
     * Cannot be used on its own, needs to be used within an AccessorNode or
     * AssignmentNode.
     *
     * @param {Node[]} dimensions
     * @param {boolean} [dotNotation=false]
     *     Optional property describing whether this index was written using dot
     *     notation like `a.b`, or using bracket notation like `a["b"]`
     *     (which is the default). This property is used for string conversion.
     */
    constructor(dimensions, dotNotation) {
      super();
      this.dimensions = dimensions;
      this.dotNotation = dotNotation || false;

      // validate input
      if (!Array.isArray(dimensions) || !dimensions.every(isNode)) {
        throw new TypeError('Array containing Nodes expected for parameter "dimensions"');
      }
      if (this.dotNotation && !this.isObjectProperty()) {
        throw new Error('dotNotation only applicable for object properties');
      }
    }
    get type() {
      return name;
    }
    get isIndexNode() {
      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) {
      // TODO: implement support for bignumber (currently bignumbers are silently
      //       reduced to numbers when changing the value to zero-based)

      // TODO: Optimization: when the range values are ConstantNodes,
      //       we can beforehand resolve the zero-based value

      // optimization for a simple object property
      var evalDimensions = map(this.dimensions, function (dimension, i) {
        var needsEnd = dimension.filter(node => node.isSymbolNode && node.name === 'end').length > 0;
        if (needsEnd) {
          // SymbolNode 'end' is used inside the index,
          // like in `A[end]` or `A[end - 2]`
          var childArgNames = Object.create(argNames);
          childArgNames.end = true;
          var _evalDimension = dimension._compile(math, childArgNames);
          return function evalDimension(scope, args, context) {
            if (!isMatrix(context) && !isArray(context) && !isString(context)) {
              throw new TypeError('Cannot resolve "end": ' + 'context must be a Matrix, Array, or string but is ' + typeOf(context));
            }
            var s = size(context).valueOf();
            var childArgs = Object.create(args);
            childArgs.end = s[i];
            return _evalDimension(scope, childArgs, context);
          };
        } else {
          // SymbolNode `end` not used
          return dimension._compile(math, argNames);
        }
      });
      var index = getSafeProperty(math, 'index');
      return function evalIndexNode(scope, args, context) {
        var dimensions = map(evalDimensions, function (evalDimension) {
          return evalDimension(scope, args, context);
        });
        return index(...dimensions);
      };
    }

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

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

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

    /**
     * Test whether this IndexNode contains a single property name
     * @return {boolean}
     */
    isObjectProperty() {
      return this.dimensions.length === 1 && isConstantNode(this.dimensions[0]) && typeof this.dimensions[0].value === 'string';
    }

    /**
     * Returns the property name if IndexNode contains a property.
     * If not, returns null.
     * @return {string | null}
     */
    getObjectProperty() {
      return this.isObjectProperty() ? this.dimensions[0].value : null;
    }

    /**
     * Get string representation
     * @param {Object} options
     * @return {string} str
     */
    _toString(options) {
      // format the parameters like "[1, 0:5]"
      return this.dotNotation ? '.' + this.getObjectProperty() : '[' + this.dimensions.join(', ') + ']';
    }

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

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

    /**
     * Get HTML representation
     * @param {Object} options
     * @return {string} str
     */
    toHTML(options) {
      // format the parameters like "[1, 0:5]"
      var dimensions = [];
      for (var i = 0; i < this.dimensions.length; i++) {
        dimensions[i] = this.dimensions[i].toHTML();
      }
      if (this.dotNotation) {
        return '<span class="math-operator math-accessor-operator">.</span>' + '<span class="math-symbol math-property">' + escape(this.getObjectProperty()) + '</span>';
      } else {
        return '<span class="math-parenthesis math-square-parenthesis">[</span>' + dimensions.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) {
      var dimensions = this.dimensions.map(function (range) {
        return range.toTex(options);
      });
      return this.dotNotation ? '.' + this.getObjectProperty() + '' : '_{' + dimensions.join(',') + '}';
    }
  }
  _defineProperty(IndexNode, "name", name);
  return IndexNode;
}, {
  isClass: true,
  isNode: true
});