import { RichSurface } from './rich-surface';
/** A revealed span's text as source: no step-out spaces, non-breaking spaces as spaces. */
export declare function revealedText(node: Node): string;
/** The toolbar states a piece of a revealed span presses. */
export declare function revealedFormats(piece: Element): string[];
export declare class RichReveal {
    private readonly surface;
    private current;
    private pointerDown;
    /** After a typing-style toggle: nothing opens until the key or click the style is for. */
    private suspended;
    private preview;
    private timer;
    constructor(surface: RichSurface);
    destroy(): void;
    /** The revealed span, while it is still in the document. */
    private live;
    holds(node: Node | null): boolean;
    /** The pointer went down in the surface: the layout holds still until it is released. */
    onPointerDown(event: MouseEvent): void;
    onPointerUp(): void;
    onKeydown(): void;
    /** A typing style is about to be toggled: it needs the rendered text, and the caret where it is. */
    suspend(): void;
    /** The selection changed: reveal what the caret touches, put back what it left. */
    update(): void;
    /** A formula or a callout's title was clicked: its source, the caret before the closing `$` or `]`. */
    revealElement(el: HTMLElement): boolean;
    /** Puts the element back. A caret in the span keeps its place in the source. */
    conceal(): void;
    /**
     * After an input: lexes the span again so its colouring follows the new
     * source. True when the caret is in it, where no typing rule applies.
     */
    restyle(): boolean;
    private piecesOf;
    private paint;
    private invalidate;
    private collapse;
    /** Whether a caret outside the span is still at one of its edges. */
    private touches;
    /** The outermost formatted element the caret is in, or else touches. */
    private find;
    private open;
    private showPreview;
    private hidePreview;
}