import { GridResizeHandler } from '../events/onGridResize.js';
import GridData from '../grid.js';
import Instruction from '../instruction.js';
import { Mode, State } from '../primitives.js';
export default abstract class Symbol extends Instruction implements GridResizeHandler {
    readonly x: number;
    readonly y: number;
    constructor(x: number, y: number);
    abstract validateSymbol(grid: GridData, solution: GridData | null): State;
    modeVariant(_mode: Mode): Symbol | null;
    onGridResize(_grid: GridData, mode: 'insert' | 'remove', direction: 'row' | 'column', index: number): this | null;
    /**
     * The step size for the x and y coordinates of the symbol.
     */
    get placementStep(): number;
    /**
     * The order in which symbols are displayed on the instruction list. Lower values are displayed first.
     */
    get sortOrder(): number;
    withX(x: number): this;
    withY(y: number): this;
    withPosition(x: number, y: number): this;
    /**
     * For symbols that can be placed between tiles, this method implements the default validation logic,
     * which requires all tiles touching the symbol to be either gray or of the same color.
     */
    protected validateSubtilePlacement(grid: GridData): boolean;
}
export declare const instance: undefined;