/// <reference types="react" />
import { BlockConfiguration } from "@wordpress/blocks";
import { RenderEditProps, RenderSaveProps } from "../../core/blocks/BlockDefinition";
import RichTextBase, { RichTextEditProps, RichTextSaveProps } from "./abstract/RichTextBase";
import BlockLeaf from "../../core/blocks/BlockLeaf";
/**
 * Heading instruction.
 */
export declare class Heading extends RichTextBase {
    options: {
        tags: (keyof HTMLElementTagNameMap)[] | Record<string, keyof HTMLElementTagNameMap>;
        defaultHeadingLevel: number;
        name: string;
        class: string;
        default: string;
        placeholder: string;
        keepPlaceholderOnFocus?: boolean;
        multiline: boolean;
        label: string;
        value: string;
    };
    /**
     * Adds the RichText attributes to the block configuration.
     *
     * @returns The block configuration.
     */
    configuration(): Partial<BlockConfiguration>;
    /**
     * Renders editing the rich text.
     *
     * @param props The render props.
     * @param leaf  The leaf being rendered.
     * @param i     The number child this is.
     *
     * @returns The RichText element.
     */
    edit(props: RenderEditProps, leaf: BlockLeaf, i: number): JSX.Element;
    /**
     * Gets the selected tag name from the props if available.
     * If not, it falls back to the default tag defined in the options or "h2".
     *
     * @param props The props.
     *
     * @returns The tag name to use.
     */
    private getHeadingLevel;
    /**
     * Gets the base attributes of the rich text.
     *
     * @param props The props.
     * @param i     The number child this is.
     *
     * @returns The base attributes.
     */
    protected getBaseAttributes(props: RenderSaveProps | RenderEditProps, i: number): RichTextSaveProps | RichTextEditProps;
}