import { Editor, Location, MaximizeMode, Node, NodeEntry, NodeMatch, Path, Point, Range } from 'slate-vue3/core';
import { CustomElement, HeadingElement } from './types';
export declare function isParagraph(n: unknown): n is CustomElement;
export declare function isNormalBlock(n: unknown): boolean;
export declare function isHeading(n: unknown): n is HeadingElement;
export declare function isBlockElement(editor: Editor, n: unknown): n is CustomElement;
export declare function getPointingOptions(editor: Editor, type: CustomElement['type']): {
    at?: Location;
    match?: NodeMatch<CustomElement>;
    mode?: MaximizeMode;
};
export declare function isPointingAt(editor: Editor, type: CustomElement['type']): boolean;
export declare function toggleBlockAttr(editor: Editor, key: string, value: string): void;
/**
 * 判断光标是否指向某个块元素的最后
 * @param editor 编辑器实例对象
 * @param type 元素类型
 * @param callback 可选的回调，在满足条件时调用，并接收此元素和其路径
 * @returns
 */
export declare function isPointAtEndOfElement(editor: Editor, type: CustomElement['type'], callback?: (match: NodeEntry) => void): boolean;
/**
 * 判断两范围是否相等
 *
 * 不像 Range.equals 需要anchor和focus的位置相同；此函数在anchor和focus相反时也能返回真。
 *
 *
 */
export declare function isRangeEqual(r1: Range, r2: Range): boolean;
/**
 * 判断某个 point 是否在指定块元素的首行
 */
export declare function isPointAtFirstLine(editor: Editor, elementPath: Path, point: Point): boolean;
/**
 * 判断某个 point 是否在指定块元素的尾行
 */
export declare function isPointAtLastLine(editor: Editor, elementPath: Path, point: Point): boolean;
/**
 * 接收 range，返回排序后的 range
 */
export declare function getSortedRange(range: Range): Range;
export declare enum RangePosition {
    BEFORE = 2340,
    BEFORE_BEGIN = 2324,
    INTERSECT_BEGIN = 2316,
    AFTER_BEGIN = 1292,
    CONTAIN = 780,
    BEFORE_END = 778,
    INTERSECT_END = 777,
    AFTER_END = 649,
    AFTER = 585,
    COVER = 1290,
    COVER_BEGIN = 2314,
    COVER_END = 1289,
    COVER_BOTH = 2313,
    BEGIN = 1300,
    END = 650
}
/**
 * 获取目标相较于当前范围的位置
 */
export declare function getRangePosition(range: Range, target: Range): RangePosition;
/**
 * 获取上一个同级节点，找不到则返回 undefined
 */
export declare function getPreviousSibling<T extends Node>(editor: Editor, path: Path, options?: {
    quit?: (node: Node, path: Path) => boolean;
    match?: NodeMatch<T>;
}): NodeEntry<T> | undefined;
/**
 * 获取下一个同级节点，找不到则返回 undefined
 */
export declare function getNextSibling<T extends Node>(editor: Editor, path: Path, options?: {
    quit?: (node: Node, path: Path) => boolean;
    match?: (node: Node, path: Path) => boolean;
}): NodeEntry<T> | undefined;
export declare function isEdgesEqual(edges: [Point, Point], another: [Point, Point]): boolean;