/**
 * DOM Service for getting the DOM tree and other DOM-related information.
 *
 * This service provides comprehensive DOM tree extraction and serialization capabilities
 * for browser automation, including accessibility information and visual layout data.
 */
import { BrowserSession } from '../browser/session';
import { DOMRect, EnhancedDOMTreeNode, SerializedDOMState } from './views';
/**
 * Service for getting the DOM tree and other DOM-related information.
 *
 * Either browser or page must be provided.
 *
 * TODO: currently we start a new websocket connection PER STEP, we should definitely keep this persistent
 */
export declare class DomService {
    private browserSession;
    private logger;
    private crossOriginIframes;
    constructor(browserSession: BrowserSession, logger?: any, crossOriginIframes?: boolean);
    /**
     * Get the target info for a specific page.
     */
    private getTargetsForPage;
    /**
     * Build enhanced accessibility node from CDP AX node data
     */
    private buildEnhancedAXNode;
    /**
     * Get viewport dimensions, device pixel ratio, and scroll position using CDP.
     */
    private getViewportRatio;
    /**
     * Check if the element is visible according to all its parent HTML frames.
     */
    static isElementVisibleAccordingToAllParents(node: EnhancedDOMTreeNode, htmlFrames: EnhancedDOMTreeNode[]): boolean;
    /**
     * Recursively collect all frames and merge their accessibility trees into a single array.
     */
    private getAXTreeForAllFrames;
    /**
     * Get DOM tree, accessibility tree, and snapshot data for a target.
     */
    private getAllTrees;
    /**
     * Recursively construct enhanced DOM tree nodes.
     */
    private constructEnhancedNode;
    /**
     * Get the DOM tree for a specific target.
     */
    getDOMTree(targetId: string, initialHtmlFrames?: EnhancedDOMTreeNode[], initialTotalFrameOffset?: DOMRect): Promise<EnhancedDOMTreeNode>;
    /**
     * Get the serialized DOM tree representation for LLM consumption.
     *
     * Returns tuple of (serialized_dom_state, enhanced_dom_tree_root, timing_info)
     */
    getSerializedDOMTree(previousCachedState?: SerializedDOMState): Promise<[SerializedDOMState, EnhancedDOMTreeNode, Record<string, number>]>;
}
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