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- function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
- function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
- function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
- function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
- function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
- function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
- function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
- function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
- function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
- function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
- function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
- function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
- var MULTIPLY_OR_DIVIDE_REGEX = /(-?\d+(?:\.\d+)?[a-zA-Z%]*)([*/])(-?\d+(?:\.\d+)?[a-zA-Z%]*)/;
- var ADD_OR_SUBTRACT_REGEX = /(-?\d+(?:\.\d+)?[a-zA-Z%]*)([+-])(-?\d+(?:\.\d+)?[a-zA-Z%]*)/;
- var CSS_LENGTH_UNIT_REGEX = /^px|cm|vh|vw|em|rem|%|mm|in|pt|pc|ex|ch|vmin|vmax|Q$/;
- var NUM_SPLIT_REGEX = /(-?\d+(?:\.\d+)?)([a-zA-Z%]+)?/;
- var CONVERSION_RATES = {
- cm: 96 / 2.54,
- mm: 96 / 25.4,
- pt: 96 / 72,
- pc: 96 / 6,
- "in": 96,
- Q: 96 / (2.54 * 40),
- px: 1
- };
- var FIXED_CSS_LENGTH_UNITS = Object.keys(CONVERSION_RATES);
- var STR_NAN = 'NaN';
- function convertToPx(value, unit) {
- return value * CONVERSION_RATES[unit];
- }
- var DecimalCSS = /*#__PURE__*/function () {
- function DecimalCSS(num, unit) {
- _classCallCheck(this, DecimalCSS);
- this.num = num;
- this.unit = unit;
- this.num = num;
- this.unit = unit;
- if (Number.isNaN(num)) {
- this.unit = '';
- }
- if (unit !== '' && !CSS_LENGTH_UNIT_REGEX.test(unit)) {
- this.num = NaN;
- this.unit = '';
- }
- if (FIXED_CSS_LENGTH_UNITS.includes(unit)) {
- this.num = convertToPx(num, unit);
- this.unit = 'px';
- }
- }
- return _createClass(DecimalCSS, [{
- key: "add",
- value: function add(other) {
- if (this.unit !== other.unit) {
- return new DecimalCSS(NaN, '');
- }
- return new DecimalCSS(this.num + other.num, this.unit);
- }
- }, {
- key: "subtract",
- value: function subtract(other) {
- if (this.unit !== other.unit) {
- return new DecimalCSS(NaN, '');
- }
- return new DecimalCSS(this.num - other.num, this.unit);
- }
- }, {
- key: "multiply",
- value: function multiply(other) {
- if (this.unit !== '' && other.unit !== '' && this.unit !== other.unit) {
- return new DecimalCSS(NaN, '');
- }
- return new DecimalCSS(this.num * other.num, this.unit || other.unit);
- }
- }, {
- key: "divide",
- value: function divide(other) {
- if (this.unit !== '' && other.unit !== '' && this.unit !== other.unit) {
- return new DecimalCSS(NaN, '');
- }
- return new DecimalCSS(this.num / other.num, this.unit || other.unit);
- }
- }, {
- key: "toString",
- value: function toString() {
- return "".concat(this.num).concat(this.unit);
- }
- }, {
- key: "isNaN",
- value: function isNaN() {
- return Number.isNaN(this.num);
- }
- }], [{
- key: "parse",
- value: function parse(str) {
- var _NUM_SPLIT_REGEX$exec;
- var _ref = (_NUM_SPLIT_REGEX$exec = NUM_SPLIT_REGEX.exec(str)) !== null && _NUM_SPLIT_REGEX$exec !== void 0 ? _NUM_SPLIT_REGEX$exec : [],
- _ref2 = _slicedToArray(_ref, 3),
- numStr = _ref2[1],
- unit = _ref2[2];
- return new DecimalCSS(parseFloat(numStr), unit !== null && unit !== void 0 ? unit : '');
- }
- }]);
- }();
- function calculateArithmetic(expr) {
- if (expr.includes(STR_NAN)) {
- return STR_NAN;
- }
- var newExpr = expr;
- while (newExpr.includes('*') || newExpr.includes('/')) {
- var _MULTIPLY_OR_DIVIDE_R;
- var _ref3 = (_MULTIPLY_OR_DIVIDE_R = MULTIPLY_OR_DIVIDE_REGEX.exec(newExpr)) !== null && _MULTIPLY_OR_DIVIDE_R !== void 0 ? _MULTIPLY_OR_DIVIDE_R : [],
- _ref4 = _slicedToArray(_ref3, 4),
- leftOperand = _ref4[1],
- operator = _ref4[2],
- rightOperand = _ref4[3];
- var lTs = DecimalCSS.parse(leftOperand !== null && leftOperand !== void 0 ? leftOperand : '');
- var rTs = DecimalCSS.parse(rightOperand !== null && rightOperand !== void 0 ? rightOperand : '');
- var result = operator === '*' ? lTs.multiply(rTs) : lTs.divide(rTs);
- if (result.isNaN()) {
- return STR_NAN;
- }
- newExpr = newExpr.replace(MULTIPLY_OR_DIVIDE_REGEX, result.toString());
- }
- while (newExpr.includes('+') || /.-\d+(?:\.\d+)?/.test(newExpr)) {
- var _ADD_OR_SUBTRACT_REGE;
- var _ref5 = (_ADD_OR_SUBTRACT_REGE = ADD_OR_SUBTRACT_REGEX.exec(newExpr)) !== null && _ADD_OR_SUBTRACT_REGE !== void 0 ? _ADD_OR_SUBTRACT_REGE : [],
- _ref6 = _slicedToArray(_ref5, 4),
- _leftOperand = _ref6[1],
- _operator = _ref6[2],
- _rightOperand = _ref6[3];
- var _lTs = DecimalCSS.parse(_leftOperand !== null && _leftOperand !== void 0 ? _leftOperand : '');
- var _rTs = DecimalCSS.parse(_rightOperand !== null && _rightOperand !== void 0 ? _rightOperand : '');
- var _result = _operator === '+' ? _lTs.add(_rTs) : _lTs.subtract(_rTs);
- if (_result.isNaN()) {
- return STR_NAN;
- }
- newExpr = newExpr.replace(ADD_OR_SUBTRACT_REGEX, _result.toString());
- }
- return newExpr;
- }
- var PARENTHESES_REGEX = /\(([^()]*)\)/;
- function calculateParentheses(expr) {
- var newExpr = expr;
- while (newExpr.includes('(')) {
- var _PARENTHESES_REGEX$ex = PARENTHESES_REGEX.exec(newExpr),
- _PARENTHESES_REGEX$ex2 = _slicedToArray(_PARENTHESES_REGEX$ex, 2),
- parentheticalExpression = _PARENTHESES_REGEX$ex2[1];
- newExpr = newExpr.replace(PARENTHESES_REGEX, calculateArithmetic(parentheticalExpression));
- }
- return newExpr;
- }
- function evaluateExpression(expression) {
- var newExpr = expression.replace(/\s+/g, '');
- newExpr = calculateParentheses(newExpr);
- newExpr = calculateArithmetic(newExpr);
- return newExpr;
- }
- export function safeEvaluateExpression(expression) {
- try {
- return evaluateExpression(expression);
- } catch (e) {
- /* istanbul ignore next */
- return STR_NAN;
- }
- }
- export function reduceCSSCalc(expression) {
- var result = safeEvaluateExpression(expression.slice(5, -1));
- if (result === STR_NAN) {
- // notify the user
- return '';
- }
- return result;
- }
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