mathjs
Version:
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif
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JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.createBlockNode = void 0;
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));
var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
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");
function _callSuper(t, o, e) { return o = (0, _getPrototypeOf2["default"])(o), (0, _possibleConstructorReturn2["default"])(t, _isNativeReflectConstruct() ? Reflect.construct(o, e || [], (0, _getPrototypeOf2["default"])(t).constructor) : o.apply(t, e)); }
function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
var name = 'BlockNode';
var dependencies = ['ResultSet', 'Node'];
var createBlockNode = exports.createBlockNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, function (_ref) {
var ResultSet = _ref.ResultSet,
Node = _ref.Node;
var BlockNode = /*#__PURE__*/function (_Node) {
(0, _inherits2["default"])(BlockNode, _Node);
/**
* @constructor BlockNode
* @extends {Node}
* Holds a set with blocks
* @param {Array.<{node: Node} | {node: Node, visible: boolean}>} blocks
* An array with blocks, where a block is constructed as an
* Object with properties block, which is a Node, and visible,
* which is a boolean. The property visible is optional and
* is true by default
*/
function BlockNode(blocks) {
var _this;
(0, _classCallCheck2["default"])(this, BlockNode);
_this = _callSuper(this, BlockNode);
// validate input, copy blocks
if (!Array.isArray(blocks)) throw new Error('Array expected');
_this.blocks = blocks.map(function (block) {
var node = block && block.node;
var visible = block && block.visible !== undefined ? block.visible : true;
if (!(0, _is.isNode)(node)) throw new TypeError('Property "node" must be a Node');
if (typeof visible !== 'boolean') {
throw new TypeError('Property "visible" must be a boolean');
}
return {
node: node,
visible: visible
};
});
return _this;
}
(0, _createClass2["default"])(BlockNode, [{
key: "type",
get: function get() {
return name;
}
}, {
key: "isBlockNode",
get: function get() {
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: *)
*/
}, {
key: "_compile",
value: function _compile(math, argNames) {
var evalBlocks = (0, _array.map)(this.blocks, function (block) {
return {
evaluate: block.node._compile(math, argNames),
visible: block.visible
};
});
return function evalBlockNodes(scope, args, context) {
var results = [];
(0, _array.forEach)(evalBlocks, function evalBlockNode(block) {
var result = block.evaluate(scope, args, context);
if (block.visible) {
results.push(result);
}
});
return new ResultSet(results);
};
}
/**
* Execute a callback for each of the child blocks of this node
* @param {function(child: Node, path: string, parent: Node)} callback
*/
}, {
key: "forEach",
value: function forEach(callback) {
for (var i = 0; i < this.blocks.length; i++) {
callback(this.blocks[i].node, 'blocks[' + i + '].node', this);
}
}
/**
* Create a new BlockNode 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 {BlockNode} Returns a transformed copy of the node
*/
}, {
key: "map",
value: function map(callback) {
var blocks = [];
for (var i = 0; i < this.blocks.length; i++) {
var block = this.blocks[i];
var node = this._ifNode(callback(block.node, 'blocks[' + i + '].node', this));
blocks[i] = {
node: node,
visible: block.visible
};
}
return new BlockNode(blocks);
}
/**
* Create a clone of this node, a shallow copy
* @return {BlockNode}
*/
}, {
key: "clone",
value: function clone() {
var blocks = this.blocks.map(function (block) {
return {
node: block.node,
visible: block.visible
};
});
return new BlockNode(blocks);
}
/**
* Get string representation
* @param {Object} options
* @return {string} str
* @override
*/
}, {
key: "_toString",
value: function _toString(options) {
return this.blocks.map(function (param) {
return param.node.toString(options) + (param.visible ? '' : ';');
}).join('\n');
}
/**
* Get a JSON representation of the node
* @returns {Object}
*/
}, {
key: "toJSON",
value: function toJSON() {
return {
mathjs: name,
blocks: this.blocks
};
}
/**
* Instantiate an BlockNode from its JSON representation
* @param {Object} json
* An object structured like
* `{"mathjs": "BlockNode", blocks: [{node: ..., visible: false}, ...]}`,
* where mathjs is optional
* @returns {BlockNode}
*/
}, {
key: "_toHTML",
value:
/**
* Get HTML representation
* @param {Object} options
* @return {string} str
* @override
*/
function _toHTML(options) {
return this.blocks.map(function (param) {
return param.node.toHTML(options) + (param.visible ? '' : '<span class="math-separator">;</span>');
}).join('<span class="math-separator"><br /></span>');
}
/**
* Get LaTeX representation
* @param {Object} options
* @return {string} str
*/
}, {
key: "_toTex",
value: function _toTex(options) {
return this.blocks.map(function (param) {
return param.node.toTex(options) + (param.visible ? '' : ';');
}).join('\\;\\;\n');
}
}], [{
key: "fromJSON",
value: function fromJSON(json) {
return new BlockNode(json.blocks);
}
}]);
return BlockNode;
}(Node);
(0, _defineProperty2["default"])(BlockNode, "name", name);
return BlockNode;
}, {
isClass: true,
isNode: true
});