import { GetNewPastedValue, GetSelection } from './types';
export declare const isSymbolAllowed: (value: string, allowedSymbols?: RegExp | "numbers" | undefined) => boolean;
export declare const isSymbolForbidden: (value: string, forbiddenSymbols?: RegExp | "numbers" | undefined) => boolean;
export declare const transformToCase: (letter: string, letterCase: "lower" | "upper" | undefined) => string;
export declare const getValue: (valueProp: string | null | undefined, valueState: string) => string;
/**
 * Helper defines if value was selected completely or partly
 * @param {number | null} selectedRange - Selected range
 * @param {number} oldValueLength - Length of previous value
 *
 * @returns {[boolean, boolean]} Array of flags that define if value was selected completely or partly
 */
export declare const getSelectionType: (selectedRange: number | null, oldValueLength: number) => [boolean, boolean];
/**
 * Helper defines cursor position or selection range
 * @param {HTMLInputElement} inputElement - Input element
 *
 * @returns {GetSelection} Cursor position and selection range
 */
export declare const getSelection: GetSelection;
/**
 * Helper calculates new value length
 * @param {string} oldValue - Value of input before paste
 * @param {string} pastedValue - Pasted value
 * @param {number | null} selectedRange - Selected range for paste
 *
 * @returns {number} New value length
 */
export declare const getNewValueLength: (oldValue: string, pastedValue: string, selectedRange: number | null) => number;
/**
 * Helper calculates maximum allowed length of pasted value
 * @param {string} oldValue - Value of input before paste
 * @param {number} maxLength - Maximum allowed value length
 * @param {number} selectedRange - Selected range for paste
 *
 * @returns {number} Maximum allowed length of pasted value
 */
export declare const getMaxPastedLength: (oldValue: string, maxLength: number, selectedRange: number | null) => number;
/**
 * Helper defines new value after paste
 * @param {GetNewPastedValue} prop - Component prop to defines new value after paste
 *
 * @returns {string | null} New value after paste
 */
export declare const getNewPastedValue: GetNewPastedValue;