"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.createRangeNode = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _is = require("../../utils/is.js");
var _factory = require("../../utils/factory.js");
var _operators = require("../operators.js");
const name = 'RangeNode';
const dependencies = ['Node'];
const createRangeNode = exports.createRangeNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
let {
Node
} = _ref;
/**
* Calculate the necessary parentheses
* @param {Node} node
* @param {string} parenthesis
* @param {string} implicit
* @return {Object} parentheses
* @private
*/
function calculateNecessaryParentheses(node, parenthesis, implicit) {
const precedence = (0, _operators.getPrecedence)(node, parenthesis, implicit);
const parens = {};
const startPrecedence = (0, _operators.getPrecedence)(node.start, parenthesis, implicit);
parens.start = startPrecedence !== null && startPrecedence <= precedence || parenthesis === 'all';
if (node.step) {
const stepPrecedence = (0, _operators.getPrecedence)(node.step, parenthesis, implicit);
parens.step = stepPrecedence !== null && stepPrecedence <= precedence || parenthesis === 'all';
}
const endPrecedence = (0, _operators.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 (!(0, _is.isNode)(start)) throw new TypeError('Node expected');
if (!(0, _is.isNode)(end)) throw new TypeError('Node expected');
if (step && !(0, _is.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
const endSymbols = this.filter(function (node) {
return (0, _is.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) {
const range = math.range;
const evalStart = this.start._compile(math, argNames);
const evalEnd = this.end._compile(math, argNames);
if (this.step) {
const 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) {
const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
// format string as start:step:stop
let str;
let start = this.start.toString(options);
if (parens.start) {
start = '(' + start + ')';
}
str = start;
if (this.step) {
let step = this.step.toString(options);
if (parens.step) {
step = '(' + step + ')';
}
str += ':' + step;
}
let 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) {
const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
// format string as start:step:stop
let str;
let 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) {
let 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;
}
let 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) {
const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
let str = this.start.toTex(options);
if (parens.start) {
str = `\\left(${str}\\right)`;
}
if (this.step) {
let step = this.step.toTex(options);
if (parens.step) {
step = `\\left(${step}\\right)`;
}
str += ':' + step;
}
let end = this.end.toTex(options);
if (parens.end) {
end = `\\left(${end}\\right)`;
}
str += ':' + end;
return str;
}
}
(0, _defineProperty2.default)(RangeNode, "name", name);
return RangeNode;
}, {
isClass: true,
isNode: true
});