import { GraphemeBreakType } from "./GraphemeBreakType";
import { RegExpOptions } from "./RegExpOptions";
export declare class StringsHelper {
    static get UNUSUAL_LINE_TERMINATORS(): RegExp;
    static get UTF8_BOM_CHARACTER(): string;
    private constructor();
    static isFalsyOrWhitespace(str: string | undefined): boolean;
    static format(value: string, ...args: any[]): string;
    static escape(html: string): string;
    static escapeRegExpCharacters(value: string): string;
    static count(value: string, character: string): number;
    static truncate(value: string, maxLength: number, suffix?: string): string;
    static trim(haystack: string, needle?: string): string;
    static ltrim(haystack: string, needle: string): string;
    static rtrim(haystack: string, needle: string): string;
    static convertSimple2RegExpPattern(pattern: string): string;
    static stripWildcards(pattern: string): string;
    static createRegExp(searchString: string, isRegex: boolean, options?: RegExpOptions): RegExp;
    static regExpLeadsToEndlessLoop(regexp: RegExp): boolean;
    static regExpContainsBackreference(regexpValue: string): boolean;
    static regExpFlags(regexp: RegExp): string;
    static splitLines(str: string): string[];
    static firstNonWhitespaceIndex(str: string): number;
    static getLeadingWhitespace(str: string, start?: number, end?: number): string;
    static lastNonWhitespaceIndex(str: string, startIndex?: number): number;
    static compare(a: string, b: string): number;
    static compareSubstring(a: string, b: string, aStart?: number, aEnd?: number, bStart?: number, bEnd?: number): number;
    static compareIgnoreCase(a: string, b: string): number;
    static compareSubstringIgnoreCase(a: string, b: string, aStart?: number, aEnd?: number, bStart?: number, bEnd?: number): number;
    static isLowerAsciiLetter(code: number): boolean;
    static isUpperAsciiLetter(code: number): boolean;
    static equalsIgnoreCase(a: string, b: string): boolean;
    static startsWithIgnoreCase(str: string, candidate: string): boolean;
    static commonPrefixLength(a: string, b: string): number;
    static commonSuffixLength(a: string, b: string): number;
    static isHighSurrogate(charCode: number): boolean;
    static isLowSurrogate(charCode: number): boolean;
    static computeCodePoint(highSurrogate: number, lowSurrogate: number): number;
    static getNextCodePoint(str: string, len: number, offset: number): number;
    static nextCharLength(str: string, offset: number): number;
    static prevCharLength(str: string, offset: number): number;
    static getCharContainingOffset(str: string, offset: number): [number, number];
    static encodeUTF8(str: string): Uint8Array;
    static decodeUTF8(buffer: Uint8Array): string;
    static containsRTL(str: string): boolean;
    static containsEmoji(str: string): boolean;
    static isBasicASCII(str: string): boolean;
    static containsUnusualLineTerminators(str: string): boolean;
    static containsFullWidthCharacter(str: string): boolean;
    static isFullWidthCharacter(charCode: number): boolean;
    static isEmojiImprecise(x: number): boolean;
    static lcut(text: string, n: number): string;
    static removeAnsiEscapeCodes(str: string): string;
    static startsWithUTF8BOM(str: string): boolean;
    static stripUTF8BOM(str: string): string;
    static fuzzyContains(target: string, query: string): boolean;
    static containsUppercaseCharacter(target: string, ignoreEscapedChars?: boolean): boolean;
    static uppercaseFirstLetter(str: string): string;
    static getNLines(str: string, n?: number): string;
    static singleLetterHash(n: number): string;
    static getGraphemeBreakType(codePoint: number): GraphemeBreakType;
    static breakBetweenGraphemeBreakType(breakTypeA: GraphemeBreakType, breakTypeB: GraphemeBreakType): boolean;
}