import { InjectionToken, Optional } from "@angular/core";
import * as i0 from "@angular/core";
/**
 * Injection token to control the base heading level within components.
 *
 * This provider allows setting or resetting the heading level hierarchy within specific components.
 * This is useful when you want to start a new heading hierarchy from level 1, regardless of parent levels.
 *
 * Common use cases include:
 * - Reset to h1 at the start of a new <article> element to maintain proper document outline
 * - Start fresh heading hierarchy in <aside> elements or sidebars
 * - Modal dialogs or overlays that should have their own heading structure
 * - Independent widgets or components that can be placed anywhere but need consistent heading levels
 * - Blog post or article comments sections that should start their own hierarchy
 *
 * @example
 * ```typescript
 * @Component({
 *   providers: [
 *     { provide: DYNAMIC_HEADING_LEVEL, useValue: 1 } // Reset to h1
 *   ]
 * })
 * ```
 */
export declare const DYNAMIC_HEADING_LEVEL: InjectionToken<number>;
/**
 * Injection token to enable debug mode for dynamic headings.
 *
 * When set to true, a pseudo element will be rendered next to each heading element
 * showing its current heading level (e.g. "H2/Heading 2"). This provides visual feedback
 * about the computed heading levels during development.
 *
 * @default false
 */
export declare const DYNAMIC_HEADING_DEBUG: InjectionToken<boolean>;
/**
 * Factory function to increase the heading level relative to parent headings.
 *
 * This can be used in two ways:
 * 1. As a provider to automatically increment heading levels by X relative to parent headings
 *    (e.g. h1 -> h2 -> h3)
 * 2. Alternatively, the level/offset inputs can be used directly on the dynamicHeading directive
 *    to explicitly set the heading level, overriding the automatic increments
 *
 * @param offset Number of levels to increment from the parent heading level (defaults to 1)
 * @returns Provider configuration for DYNAMIC_HEADING_LEVEL
 */
export declare function increaseDynamicHeadingLevel(): {
    provide: InjectionToken<number>;
    useFactory: (parentLevel: number | null) => number;
    deps: Optional[][];
};
export declare class DynamicHeadingDirective {
    #private;
    debug: boolean;
    dynamicHeadingClass: import("@angular/core").InputSignal<string>;
    _level: import("@angular/core").InputSignalWithTransform<number, string | number>;
    offset: import("@angular/core").InputSignalWithTransform<number, string | number>;
    level: import("@angular/core").Signal<number>;
    constructor();
    static ɵfac: i0.ɵɵFactoryDeclaration<DynamicHeadingDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DynamicHeadingDirective, "[dynamicHeading]", never, { "dynamicHeadingClass": { "alias": "dynamicHeadingClass"; "required": false; "isSignal": true; }; "_level": { "alias": "level"; "required": false; "isSignal": true; }; "offset": { "alias": "offset"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}