/******************************************************************************
 * 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 { LangiumDocument, MaybePromise } from 'langium';
import type { Position } from 'vscode-languageserver';
import type { DocumentHighlight, DocumentHighlightParams } from 'vscode-languageserver';
import type { LangiumSprottyServices } from './sprotty-services.js';
import { DefaultDocumentHighlightProvider } from 'langium/lsp';
/**
 * This service provides access to the user's current cursor position.
 */
export interface PositionTracker {
    firePositionChanged(document: LangiumDocument, position: Position): void;
    onPositionChanged(listener: PositionChangeListener): void;
    removePositionChangeListener(listener: PositionChangeListener): void;
    getOffset(document: LangiumDocument): number | undefined;
}
export type PositionChangeListener = (document: LangiumDocument, position: Position) => void;
export declare class DefaultPositionTracker {
    protected readonly positionMap: Map<string, Position>;
    protected readonly positionChangeListeners: PositionChangeListener[];
    constructor(services: LangiumSprottyServices);
    firePositionChanged(document: LangiumDocument, position: Position): void;
    onPositionChanged(listener: PositionChangeListener): void;
    removePositionChangeListener(listener: PositionChangeListener): void;
    getOffset(document: LangiumDocument): number | undefined;
}
/**
 * Exploit the client's document highlight requests to track cursor positions.
 * Known limitation: document highlight requests are not sent when the cursor is surrounded by whitespace.
 */
export declare class TrackingDocumentHighlightProvider extends DefaultDocumentHighlightProvider {
    private readonly positionTracker;
    constructor(services: LangiumSprottyServices);
    getDocumentHighlight(document: LangiumDocument, params: DocumentHighlightParams): MaybePromise<DocumentHighlight[] | undefined>;
}
//# sourceMappingURL=position-tracker.d.ts.map