import { EventEmitter, NgZone, OnChanges, SimpleChanges } from '@angular/core';
import { VexHighlightResult } from './vex-highlight.model';
import { VexHighlightService } from './vex-highlight.service';
import * as i0 from "@angular/core";
export declare class VexHighlightDirective implements OnChanges {
    private _highlightService;
    private _zone;
    /** Highlighted Code */
    highlightedCode?: string;
    /** An optional array of language names and aliases restricting detection to only those languages.
     * The subset can also be set with configure, but the local parameter overrides the option if set.
     */
    languages: string[];
    /** Highlight code input */
    code: string;
    /** Stream that emits when code string is highlighted */
    highlighted: EventEmitter<VexHighlightResult>;
    constructor(_highlightService: VexHighlightService, _zone: NgZone);
    ngOnChanges(changes: SimpleChanges): void;
    /**
     * Highlighting with language detection and fix markup.
     * @param code Accepts a string with the code to highlight
     * @param languages An optional array of language names and aliases restricting detection to only those languages.
     * The subset can also be set with configure, but the local parameter overrides the option if set.
     */
    highlightElement(code: string, languages: string[]): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<VexHighlightDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<VexHighlightDirective, "[vexHighlight]", never, { "languages": { "alias": "languages"; "required": false; }; "code": { "alias": "vexHighlight"; "required": false; }; }, { "highlighted": "highlighted"; }, never, never, true, never>;
}
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