import { EyeDropper, ColorSelectionOptions, ColorSelectionResult } from './types';
/**
 * EyeDropper API polyfill
 * https://wicg.github.io/eyedropper-api/#dom-colorselectionoptions
 */
export declare class EyeDropperPolyfill implements EyeDropper {
    private colorSelectionResult?;
    private previousDocumentCursor?;
    private canvas?;
    private canvasCtx?;
    private resolve?;
    private lastPoint?;
    private magnification;
    constructor();
    /**
     * Opens the polyfilled eyedropper
     *
     * §3.3 EyeDropper interface ► `open()`
     */
    open(options?: ColorSelectionOptions): Promise<ColorSelectionResult>;
    /**
     * Starting eyedropper mode
     */
    private start;
    /**
     * Stopping eyedropper mode
     */
    private stop;
    /**
     * Creates fake screenshot of page and assign it to the body
     */
    private createScreenshot;
    /**
     * Removes screenshot from page
     */
    private removeScreenshot;
    /**
     * Sets waiting cursor
     */
    private setWaitingCursor;
    /**
     * Removes waiting cursor
     */
    private revertWaitingCursor;
    /**
     * Binds events
     */
    private bindEvents;
    /**
     * Unbinds `mousemove` events
     */
    private unbindEvents;
    /**
     * `click` handler
     */
    private onClick;
    /**
     * `mousemove` handler
     */
    private onMouseMove;
    /**
     * Detects color from canvas data
     */
    private detectColor;
    /**
     * Canvas styles creator
     */
    private addCanvasStyle;
}