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

import _defineProperty from "@babel/runtime/helpers/defineProperty";
import { isNode, isSymbolNode } from '../../utils/is.js';
import { factory } from '../../utils/factory.js';
import { getPrecedence } from '../operators.js';
var name = 'RangeNode';
var dependencies = ['Node'];
export var createRangeNode = /* #__PURE__ */factory(name, dependencies, _ref => {
  var {
    Node
  } = _ref;
  /**
   * Calculate the necessary parentheses
   * @param {Node} node
   * @param {string} parenthesis
   * @param {string} implicit
   * @return {Object} parentheses
   * @private
   */
  function calculateNecessaryParentheses(node, parenthesis, implicit) {
    var precedence = getPrecedence(node, parenthesis, implicit);
    var parens = {};
    var startPrecedence = getPrecedence(node.start, parenthesis, implicit);
    parens.start = startPrecedence !== null && startPrecedence <= precedence || parenthesis === 'all';
    if (node.step) {
      var stepPrecedence = getPrecedence(node.step, parenthesis, implicit);
      parens.step = stepPrecedence !== null && stepPrecedence <= precedence || parenthesis === 'all';
    }
    var endPrecedence = getPrecedence(node.end, parenthesis, implicit);
    parens.end = endPrecedence !== null && endPrecedence <= precedence || parenthesis === 'all';
    return parens;
  }
  class RangeNode extends Node {
    /**
     * @constructor RangeNode
     * @extends {Node}
     * create a range
     * @param {Node} start  included lower-bound
     * @param {Node} end    included upper-bound
     * @param {Node} [step] optional step
     */
    constructor(start, end, step) {
      super();
      // validate inputs
      if (!isNode(start)) throw new TypeError('Node expected');
      if (!isNode(end)) throw new TypeError('Node expected');
      if (step && !isNode(step)) throw new TypeError('Node expected');
      if (arguments.length > 3) throw new Error('Too many arguments');
      this.start = start; // included lower-bound
      this.end = end; // included upper-bound
      this.step = step || null; // optional step
    }

    get type() {
      return name;
    }
    get isRangeNode() {
      return true;
    }

    /**
     * Check whether the RangeNode needs the `end` symbol to be defined.
     * This end is the size of the Matrix in current dimension.
     * @return {boolean}
     */
    needsEnd() {
      // find all `end` symbols in this RangeNode
      var endSymbols = this.filter(function (node) {
        return isSymbolNode(node) && node.name === 'end';
      });
      return endSymbols.length > 0;
    }

    /**
     * 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 range = math.range;
      var evalStart = this.start._compile(math, argNames);
      var evalEnd = this.end._compile(math, argNames);
      if (this.step) {
        var evalStep = this.step._compile(math, argNames);
        return function evalRangeNode(scope, args, context) {
          return range(evalStart(scope, args, context), evalEnd(scope, args, context), evalStep(scope, args, context));
        };
      } else {
        return function evalRangeNode(scope, args, context) {
          return range(evalStart(scope, args, context), evalEnd(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) {
      callback(this.start, 'start', this);
      callback(this.end, 'end', this);
      if (this.step) {
        callback(this.step, 'step', this);
      }
    }

    /**
     * Create a new RangeNode 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 {RangeNode} Returns a transformed copy of the node
     */
    map(callback) {
      return new RangeNode(this._ifNode(callback(this.start, 'start', this)), this._ifNode(callback(this.end, 'end', this)), this.step && this._ifNode(callback(this.step, 'step', this)));
    }

    /**
     * Create a clone of this node, a shallow copy
     * @return {RangeNode}
     */
    clone() {
      return new RangeNode(this.start, this.end, this.step && this.step);
    }

    /**
     * Get string representation
     * @param {Object} options
     * @return {string} str
     */
    _toString(options) {
      var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
      var parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);

      // format string as start:step:stop
      var str;
      var start = this.start.toString(options);
      if (parens.start) {
        start = '(' + start + ')';
      }
      str = start;
      if (this.step) {
        var step = this.step.toString(options);
        if (parens.step) {
          step = '(' + step + ')';
        }
        str += ':' + step;
      }
      var end = this.end.toString(options);
      if (parens.end) {
        end = '(' + end + ')';
      }
      str += ':' + end;
      return str;
    }

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

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

    /**
     * Get HTML representation
     * @param {Object} options
     * @return {string} str
     */
    toHTML(options) {
      var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
      var parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);

      // format string as start:step:stop
      var str;
      var start = this.start.toHTML(options);
      if (parens.start) {
        start = '<span class="math-parenthesis math-round-parenthesis">(</span>' + start + '<span class="math-parenthesis math-round-parenthesis">)</span>';
      }
      str = start;
      if (this.step) {
        var step = this.step.toHTML(options);
        if (parens.step) {
          step = '<span class="math-parenthesis math-round-parenthesis">(</span>' + step + '<span class="math-parenthesis math-round-parenthesis">)</span>';
        }
        str += '<span class="math-operator math-range-operator">:</span>' + step;
      }
      var end = this.end.toHTML(options);
      if (parens.end) {
        end = '<span class="math-parenthesis math-round-parenthesis">(</span>' + end + '<span class="math-parenthesis math-round-parenthesis">)</span>';
      }
      str += '<span class="math-operator math-range-operator">:</span>' + end;
      return str;
    }

    /**
     * Get LaTeX representation
     * @params {Object} options
     * @return {string} str
     */
    _toTex(options) {
      var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
      var parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
      var str = this.start.toTex(options);
      if (parens.start) {
        str = "\\left(".concat(str, "\\right)");
      }
      if (this.step) {
        var step = this.step.toTex(options);
        if (parens.step) {
          step = "\\left(".concat(step, "\\right)");
        }
        str += ':' + step;
      }
      var end = this.end.toTex(options);
      if (parens.end) {
        end = "\\left(".concat(end, "\\right)");
      }
      str += ':' + end;
      return str;
    }
  }
  _defineProperty(RangeNode, "name", name);
  return RangeNode;
}, {
  isClass: true,
  isNode: true
});