import type { IAABBBounds, IBoundsLike } from '@visactor/vutils';
import { LabelBase } from './base';
import type { ArcLabelAttrs, IPoint, Quadrant, BaseLabelAttrs, LabelItem, IArcLabelLineSpec } from './type';
import type { IArc } from '@visactor/vrender-core';
import { type IRichText, type IText, type IGraphic } from '@visactor/vrender-core';
import type { ComponentOptions } from '../interface';
export declare class ArcInfo {
    key: string;
    refDatum: any;
    refArc: IArc;
    center: IPoint;
    outerCenter: IPoint;
    labelSize: {
        width: number;
        height: number;
    };
    labelPosition: IPoint;
    labelLimit: number;
    labelVisible: boolean;
    lastLabelY: number;
    labelYRange: [number, number];
    labelText: string | string[];
    pointA: IPoint;
    pointB: IPoint;
    pointC: IPoint;
    labelLine: IArcLabelLineSpec;
    quadrant: Quadrant;
    radian: number;
    middleAngle: number;
    innerRadius: number;
    outerRadius: number;
    circleCenter: IPoint;
    k: number;
    angle: number;
    constructor(refDatum: any, center: IPoint, outerCenter: IPoint, quadrant: Quadrant, radian: number, middleAngle: number, innerRadius: number, outerRadius: number, circleCenter: IPoint);
    getLabelBounds(): IBoundsLike;
}
export declare class ArcLabel extends LabelBase<ArcLabelAttrs> {
    name: string;
    static defaultAttributes: Partial<ArcLabelAttrs>;
    private _ellipsisWidth;
    private _arcLeft;
    private _arcRight;
    private _line2MinLength;
    private _alignOffset;
    constructor(attributes: ArcLabelAttrs, options?: ComponentOptions);
    protected _overlapping(labels: (IText | IRichText)[]): (IRichText | IText)[];
    protected labeling(textBounds: IBoundsLike, graphicBounds: IBoundsLike, position?: string, offset?: number): {
        x: number;
        y: number;
    } | undefined;
    protected _layout(texts: (IText | IRichText)[]): (IRichText | IText)[];
    protected layoutArcLabels(position: BaseLabelAttrs['position'], attribute: any, currentMarks?: IGraphic[], data?: LabelItem[], textBoundsArray?: any, ellipsisWidth?: number): ArcInfo[];
    private _layoutInsideLabels;
    private _layoutOutsideLabels;
    private _computeX;
    private _computeAlign;
    private _getFormatLabelText;
    private _adjustY;
    private _shiftY;
    private _findNextVisibleIndex;
    private _computePointB;
    private _storeY;
    private _computeYRange;
    private _computeLayoutRadius;
    private _findNeighborIndex;
    private _twoWayShift;
    private _restoreY;
    private _checkYRange;
    private _coverLabels;
    protected _getLabelLinePoints(text: IText | IRichText, baseMark?: IGraphic): IPoint[];
    protected _createLabelLine(text: IText, baseMark?: IGraphic): import("@visactor/vrender-core").ILine;
    protected computeRadius(r: number, width?: number, height?: number, k?: number): number;
    protected computeLayoutRadius(width: number, height: number): number;
    protected _canPlaceInside(textBound: IBoundsLike, shapeBound: IAABBBounds): boolean;
    private computeLayoutOuterRadius;
    private computeDatumRadius;
}
export declare const registerArcDataLabel: () => void;