import { EditorView, ViewUpdate, BlockInfo } from "@codemirror/next/view";
import { Range, RangeValue, RangeSet } from "@codemirror/next/rangeset";
import { Facet, Extension } from "@codemirror/next/state";
export declare abstract class GutterMarker extends RangeValue {
    abstract eq(other: GutterMarker): boolean;
    toDOM(_view: EditorView): Node | null;
    at(pos: number): Range<this>;
    elementClass: string;
}
declare type Handlers = {
    [event: string]: (view: EditorView, line: BlockInfo, event: any) => boolean;
};
interface GutterConfig {
    style?: string;
    renderEmptyElements?: boolean;
    markers?: (view: EditorView) => (RangeSet<GutterMarker> | readonly RangeSet<GutterMarker>[]);
    lineMarker?: (view: EditorView, line: BlockInfo, otherMarkers: readonly GutterMarker[]) => GutterMarker | null;
    initialSpacer?: null | ((view: EditorView) => GutterMarker);
    updateSpacer?: null | ((spacer: GutterMarker, update: ViewUpdate) => GutterMarker);
    domEventHandlers?: Handlers;
}
export declare function gutter(config: GutterConfig): Extension;
export declare function gutters(config?: {
    fixed?: boolean;
}): Extension;
interface LineNumberConfig {
    formatNumber?: (lineNo: number) => string;
    domEventHandlers?: Handlers;
}
export declare const lineNumberMarkers: Facet<RangeSet<GutterMarker>, readonly RangeSet<GutterMarker>[]>;
export declare function lineNumbers(config?: LineNumberConfig): Extension;
export {};
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