export interface FramePosition {
    aspectRatio: number;
    realIndex: number;
    virtualIndex: number;
    realBottom: number;
    virtualBottom: number;
    height: number;
    width: number;
}
export declare abstract class BaseMasonryGrid {
    /**
     * Container element that holds the grid.
     */
    protected container: HTMLElement;
    /**
     * Grid gap value in pixels.
     * -1 means that the gap is not calculated or set.
     */
    protected gap: number;
    /**
     * Width of the frame in pixels.
     * -1 means that the width is not calculated or set.
     */
    protected frameWidth: number;
    /**
     * Width of the container in pixels.
     * -1 means that the width is not calculated or set.
     */
    protected containerWidth: number;
    /**
     * Number of columns in the grid.
     * -1 means that the number of columns is not calculated or set.
     */
    protected columnsCount: number;
    /**
     * Aspect ratio of the container.
     * -1 means that the aspect ratio is not calculated or set.
     */
    protected containerAspectRatio: number;
    /**
     * Map of frames positions.
     * Key is the frame element, value is the FramePosition object.
     */
    protected framesPositionsMap: WeakMap<HTMLElement, FramePosition>;
    /**
     * Resize observer to observe changes in the container and marker size.
     */
    protected resizeObserver: ResizeObserver;
    /**
     * Mutation observer to observe changes in the container's children.
     */
    protected mutationObserver: MutationObserver;
    /**
     * Marker element to observe column width changes.
     */
    protected marker: HTMLElement;
    constructor(
    /**
     * Container element that holds the grid.
     */
    container: HTMLElement);
    /**
     * Resize the height of the container based on the current width and aspect ratio.
     * If the aspect ratio is not set, the height will be removed.
     * Aspect ratio should be set while reflowing the grid.
     */
    protected resizeHeight(): void;
    /**
     * Get the aspect ratio of the frame based on its width and height.
     * @param element - The frame element to calculate the aspect ratio for.
     * @returns The aspect ratio of the frame as a number (height / width).
     */
    protected getFrameAspectRatio(element: HTMLElement): number;
    /**
     * Get the position of the frame in the grid.
     * @param element - The frame element to get the position for.
     * @param i - The real index of the frame in the grid.
     * @param offset - The offset from the top of the container in pixels.
     * @returns An object containing the position of the frame in the grid.
     */
    protected getFramePosition(element: HTMLElement, i: number, offset: number): FramePosition;
    /**
     * Get the position of the frame in the grid and cache it.
     * @param element - The frame element to get the position for.
     * @param i - The real index of the frame in the grid.
     * @param offset - The offset from the top of the container in pixels.
     * @returns An object containing the position of the frame in the grid.
     */
    protected getFramePositionAndCache(element: HTMLElement, i: number, offset: number): FramePosition;
    /**
     * Get the cached position of the frame in the grid and scale it to the current frame width.
     * If the frame position is not cached or the index does not match, return null.
     * @param element - The frame element to get the position for.
     * @param i - The real index of the frame in the grid.
     * @returns An object containing the scaled position of the frame in the grid or null if not found.
     */
    protected getCachedScaledFramePosition(element: HTMLElement, i: number, framesCount: number): FramePosition | null;
    /**
     * Reflow the grid.
     * @param isMutation - Whether the reflow is triggered by a mutation (e.g. adding/removing frames).
     */
    protected abstract reflow(isMutation?: boolean): void;
    /**
     * Destroy the MasonryGrid instance.
     */
    destroy(): void;
}
//# sourceMappingURL=BaseMasonryGrid.d.ts.map