import { Extension } from "@tiptap/core";
declare module "@tiptap/core" {
    interface Commands<ReturnType> {
        indent: {
            /** 增加当前段落或标题的缩进层级。 */
            increaseIndent: () => ReturnType;
            /** 减少当前段落或标题的缩进层级。 */
            decreaseIndent: () => ReturnType;
        };
    }
}
export interface IndentOptions {
    types: string[];
    step: number;
    maxLevel: number;
}
/** 轻量块级缩进扩展，用于 paragraph / heading。 */
export declare const Indent: Extension<IndentOptions, any>;
