import { LocaleData, SubscribeCallback, TransformedText, UnsubscribeCallback } from './types';
declare const i18n: import("./types").I18n<string>;
/**
 * Default, singleton instance of `I18n`.
 */
export default i18n;
/**
 * Returns locale data by domain in a Jed-formatted JSON object shape.
 *
 * @see http://messageformat.github.io/Jed/
 *
 * @param { string | undefined } [domain] Domain for which to get the data.
 * @return { LocaleData } Locale data.
 */
export declare const getLocaleData: (domain?: string | undefined) => LocaleData<string>;
/**
 * Merges locale data into the Tannin instance by domain. Accepts data in a
 * Jed-formatted JSON object shape.
 *
 * @see http://messageformat.github.io/Jed/
 *
 * @param {LocaleData }        [data]   Locale data configuration.
 * @param {string | undefined} [domain] Domain for which configuration applies.
 */
export declare const setLocaleData: (data?: LocaleData<string> | undefined, domain?: string | undefined) => void;
/**
 * Resets all current Tannin instance locale data and sets the specified
 * locale data for the domain. Accepts data in a Jed-formatted JSON object shape.
 *
 * @see http://messageformat.github.io/Jed/
 *
 * @param {LocaleData}         [data]   Locale data configuration.
 * @param {string | undefined} [domain] Domain for which configuration applies.
 */
export declare const resetLocaleData: (data?: LocaleData<string> | undefined, domain?: string | undefined) => void;
/**
 * Subscribes to changes of locale data
 *
 * @param {SubscribeCallback} callback Subscription callback
 * @return {UnsubscribeCallback} Unsubscribe callback
 */
export declare const subscribe: (callback: SubscribeCallback) => UnsubscribeCallback;
/**
 * Retrieve the translation of text.
 *
 * @see https://developer.wordpress.org/reference/functions/__/
 *
 * @template {string} Text
 *
 * @param {Text}               text   Text to translate.
 * @param {string | undefined} domain Domain to retrieve the translated text.
 *
 * @return {TransformedText<Text>} Translated text.
 */
export declare const __: <Text extends string>(text: Text, domain?: string | undefined) => TransformedText<Text>;
/**
 * Retrieve translated string with gettext context.
 *
 * @see https://developer.wordpress.org/reference/functions/_x/
 *
 * @template {string} Text
 *
 * @param {Text}               text    Text to translate.
 * @param {string}             context Context information for the translators.
 * @param {string | undefined} domain  Domain to retrieve the translated text.
 *
 * @return {TransformedText<Text>} Translated context string without pipe.
 */
export declare const _x: <Text extends string>(text: Text, context: string, domain?: string | undefined) => TransformedText<Text>;
/**
 * Translates and retrieves the singular or plural form based on the supplied
 * number.
 *
 * @see https://developer.wordpress.org/reference/functions/_n/
 *
 * @template {string} Single
 * @template {string} Plural
 *
 * @param {Single}             single The text to be used if the number is singular.
 * @param {Plural}             plural The text to be used if the number is plural.
 * @param {number}             number The number to compare against to use either the
 *                                    singular or plural form.
 * @param {string | undefined} domain Domain to retrieve the translated text.
 *
 * @return {TransformedText<Single | Plural>} The translated singular or plural form.
 */
export declare const _n: <Single extends string, Plural extends string>(single: Single, plural: Plural, number: number, domain?: string | undefined) => TransformedText<Single | Plural>;
/**
 * Translates and retrieves the singular or plural form based on the supplied
 * number, with gettext context.
 *
 * @see https://developer.wordpress.org/reference/functions/_nx/
 *
 * @template {string} Single
 * @template {string} Plural
 * @param {Single}             single   The text to be used if the number is singular.
 *
 * @param {Single}             single   The text to be used if the number is singular.
 * @param {Plural}             plural   The text to be used if the number is plural.
 * @param {number}             number   The number to compare against to use either the
 *                                      singular or plural form.
 * @param {string}             context  Context information for the translators.
 * @param {string | undefined} [domain] Domain to retrieve the translated text.
 *
 * @return {TransformedText<Single | Plural>} The translated singular or plural form.
 */
export declare const _nx: <Single extends string, Plural extends string>(single: Single, plural: Plural, number: number, context: string, domain?: string | undefined) => TransformedText<Single | Plural>;
/**
 * Check if current locale is RTL.
 *
 * **RTL (Right To Left)** is a locale property indicating that text is written from right to left.
 * For example, the `he` locale (for Hebrew) specifies right-to-left. Arabic (ar) is another common
 * language written RTL. The opposite of RTL, LTR (Left To Right) is used in other languages,
 * including English (`en`, `en-US`, `en-GB`, etc.), Spanish (`es`), and French (`fr`).
 *
 * @return {boolean} Whether locale is RTL.
 */
export declare const isRTL: () => boolean;
/**
 * Check if there is a translation for a given string (in singular form).
 *
 * @param {string} single  Singular form of the string to look up.
 * @param {string} context Context information for the translators.
 * @param {string} domain  Domain to retrieve the translated text.
 *
 * @return {boolean} Whether the translation exists or not.
 */
export declare const hasTranslation: (single: string, context?: string, domain?: string | undefined) => boolean;
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