Function getCurve

src/core/data-structures/curve.js:265–290

(curve)

 * @return {?CurveDef}
 */
export function getCurve(curve) {
  if (!curve) {
    return null;
  }
  if (isString(curve)) {
    curve = /** @type {string} */ (curve);
    // If the curve is a custom cubic-bezier curve
    if (curve.indexOf('cubic-bezier') != -1) {
      const match = curve.match(/cubic-bezier\((.+)\)/);
      if (match) {
        const values = match[1].split(',').map(parseFloat);
        if (values.length == 4) {
          for (let i = 0; i < 4; i++) {
            if (isNaN(values[i])) {
              return null;
            }
          }
          return bezierCurve(values[0], values[1], values[2], values[3]);
        }
      }
      return null;
    }
    return NAME_MAP[curve];
  }
  return /** @type {CurveDef} */ (curve);
}