import { Overlay } from '@blocksuite/affine-block-surface';
import { Bound, type IVec } from '@blocksuite/global/gfx';
import type { GfxModel } from '@blocksuite/std/gfx';
export declare class SnapOverlay extends Overlay {
    static overlayName: string;
    private _skippedElements;
    private _referenceBounds;
    /**
     * This variable contains reference lines that are
     * generated by the 'Distribute Alignment' function. This alignment is achieved
     * by evenly distributing elements based on specified alignment rules.
     * These lines serve as a guide for achieving equal spacing or distribution
     * among multiple graphics or design elements.
     */
    private _distributedAlignLines;
    /**
     * This variable holds reference lines that are calculated
     * based on the self-alignment of the graphics. This alignment is determined
     * according to various aspects of the graphic itself, such as the center, edges,
     * corners, etc. It essentially represents the guidelines for the positioning
     * and alignment within the individual graphic elements.
     */
    private _intraGraphicAlignLines;
    clear(): void;
    private _alignDistributeHorizontally;
    private _alignDistributeVertically;
    private _calculateClosestDistances;
    /**
     * Update horizontal moving distance `rst.dx` to align with other bound.
     * Also, update the align points to draw.
     * @param rst
     * @param bound
     * @param other
     * @param distance
     */
    private _updateXAlignPoint;
    /**
     * Update vertical moving distance `rst.dy` to align with other bound.
     * Also, update the align points to draw.
     * @param rst
     * @param bound
     * @param other
     * @param distance
     */
    private _updateYAlignPoint;
    alignResize(position: IVec, direction: ('vertical' | 'horizontal')[]): {
        dx: number;
        dy: number;
    };
    align(bound: Bound): {
        dx: number;
        dy: number;
    };
    render(ctx: CanvasRenderingContext2D): void;
    private _isSkippedElement;
    private _updateAlignCandidates;
    setMovingElements(movingElements: GfxModel[], excludes?: GfxModel[]): Bound;
}
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