/******************************************************************************
 * Copyright 2023 TypeFox GmbH
 * This program and the accompanying materials are made available under the
 * terms of the MIT License, which is available in the project root.
 ******************************************************************************/
import type { AstNode, AstNodeLocator, LangiumDocuments } from 'langium';
import type { SModelElement, SModelRoot } from 'sprotty-protocol';
import type { LangiumSprottyServices } from './sprotty-services.js';
export interface TracedModelElement extends SModelElement {
    trace?: string;
}
/**
 * Compute traces from Langium AST nodes to Sprotty model elements.
 * The traces are used to synchronize selection between text and diagram, among other features.
 */
export interface TraceProvider {
    /**
     * Trace a Sprotty model element to a whole AST node or a specific property.
     */
    trace(target: TracedModelElement, source: AstNode, property?: string, index?: number): void;
    /**
     * Find the source AST node for a given Sprotty model element.
     */
    getSource(target: TracedModelElement): AstNode | undefined;
    /**
     * Find the target model element for a given source AST node.
     */
    getTarget(source: AstNode, root: SModelRoot): TracedModelElement | undefined;
}
export declare class DefaultTraceProvider implements TraceProvider {
    protected readonly langiumDocuments: LangiumDocuments;
    protected readonly astNodeLocator: AstNodeLocator;
    constructor(services: LangiumSprottyServices);
    trace(target: TracedModelElement, source: AstNode, property?: string | undefined, index?: number | undefined): void;
    getSource(target: TracedModelElement): AstNode | undefined;
    getTarget(source: AstNode, root: SModelRoot): TracedModelElement | undefined;
    private findTargetElements;
}
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