@greg-md/ng-flex-css-layout/esm2015/lib/basis-validator.js

Flex-CSS-Layout is an alternative behaviour of Flex-Layout directives, that will still work with Angular Universal and App Shell.

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes} checked by tsc
 */
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/**
 * The flex API permits 3 or 1 parts of the value:
 *    - `flex-grow flex-shrink flex-basis`, or
 *    - `flex-basis`
 * @param {?} basis
 * @param {?=} grow
 * @param {?=} shrink
 * @return {?}
 */
export function validateBasis(basis, grow = '1', shrink = '1') {
    let /** @type {?} */ parts = [grow, shrink, basis];
    const /** @type {?} */ j = basis.indexOf('calc');
    if (j > 0) {
        parts[2] = _validateCalcValue(basis.substring(j).trim());
        const /** @type {?} */ matches = basis.substr(0, j).trim().split(' ');
        if (matches.length === 2) {
            parts[0] = matches[0];
            parts[1] = matches[1];
        }
    }
    else if (j === 0) {
        parts[2] = _validateCalcValue(basis.trim());
    }
    else {
        const /** @type {?} */ matches = basis.split(' ');
        parts = (matches.length === 3) ? matches : [
            grow, shrink, basis
        ];
    }
    return parts;
}
/**
 * Calc expressions require whitespace before & after any expression operators
 * This is a simple, crude whitespace padding solution.
 *   - '3 3 calc(15em + 20px)'
 *   - calc(100% / 7 * 2)
 *   - 'calc(15em + 20px)'
 *   - 'calc(15em+20px)'
 *   - '37px'
 *   = '43%'
 * @param {?} calc
 * @return {?}
 */
function _validateCalcValue(calc) {
    return calc.replace(/[\s]/g, '').replace(/[\/\*\+\-]/g, ' $& ');
}

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