import { RanElement } from '../../utils';
import '@/components/icon';
type RenderModule = typeof import('./render');
interface BlockState {
    /** The block's diff key (source + the document's link definitions). */
    key: string;
    incomplete: boolean;
    el: HTMLElement;
    /** Embedded renderers in this block whose theme follows the host. */
    themed: HTMLElement[];
}
/**
 * `<r-markdown>` — streaming-friendly Markdown renderer.
 *
 * Designed for AI-chat style output (à la Vercel Streamdown), but works for static
 * content too. In `mode="streaming"` (default) the text is first run through
 * `remend`, which closes half-streamed `**bold`, `` `code ``, links, `$$` math and so on,
 * then split into blocks; only the block whose text changed is re-rendered, so a
 * long answer never re-parses from the top on every token.
 *
 * Fenced ```mermaid blocks become `<r-mermaid>`, `$$…$$` / `\[…\]` / `\(…\)` become
 * `<r-math>`; both are lazily registered only when the content needs them.
 */
export declare class Markdown extends RanElement {
    _shadowDom: ShadowRoot;
    _wrap: HTMLElement;
    _body: HTMLElement;
    _blocks: BlockState[];
    /** Content set through the property (not reflected — streaming text can be huge). */
    _content: string | null;
    /** In-flight render, so tests (and consumers) can `await el._pending`. */
    _pending: Promise<void>;
    _renderToken: number;
    _renderModule: RenderModule | null;
    _themeObserver?: MutationObserver;
    _lightDomObserver?: MutationObserver;
    _copyResetTimer?: number;
    _error?: HTMLElement;
    static get observedAttributes(): string[];
    constructor();
    /**
     * Markdown source. Resolution order: the `content` property (set via JS, not
     * reflected), the `content` attribute, then the element's text content.
     */
    get content(): string;
    set content(value: string);
    get mode(): string;
    set mode(value: string);
    get theme(): string;
    set theme(value: string);
    get caret(): string;
    set caret(value: string | null);
    get copyable(): boolean;
    set copyable(v: boolean);
    get downloadable(): boolean;
    set downloadable(v: boolean);
    get lineNumbers(): boolean;
    set lineNumbers(v: boolean);
    /** `""` → github-light/github-dark; `"a"` → both; `"a b"` → light / dark theme. */
    get highlight(): string | null;
    set highlight(value: string | null);
    get inlineMath(): boolean;
    set inlineMath(v: boolean);
    get linkTarget(): string;
    set linkTarget(value: string);
    get sheet(): string;
    set sheet(value: string);
    private label;
    private emit;
    handlerExternalCss: () => void;
    private resolveTheme;
    private syncTheme;
    private observeTheme;
    render(): void;
    private renderWith;
    private createBlockElement;
    private showError;
    /** Force a full re-render (e.g. after toggling controls). */
    private rerender;
    private copyCode;
    private downloadCode;
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(k: string, o: string | null, n: string | null): void;
}
export default Markdown;