export interface Delta {
    ops: UnknownOp[];
}
export interface UnknownOp {
    insert?: unknown;
}
export type Op = InsertOp | LineFormatOp;
export declare function isOp(value: UnknownOp): value is Op;
export interface InsertOp {
    insert: string | ImageInsert;
    attributes?: TextAttributes & StyleAttributes;
}
export interface ImageInsert {
    image: string;
}
export declare function isImage(value: unknown): value is ImageInsert;
export interface LineFormatOp {
    insert: '\n';
    attributes: LineAttributes & StyleAttributes;
}
export declare function isLineFormatOp(op: Op): op is LineFormatOp;
export interface TextAttributes {
    bold?: boolean;
    italic?: boolean;
    link?: string;
    script?: string;
    strike?: boolean;
    underline?: boolean;
}
export type TextAttribute = keyof TextAttributes;
export interface LineAttributes {
    blockquote?: boolean;
    header?: number;
    list?: string;
    indent?: number;
}
export type LineAttribute = keyof LineAttributes;
export interface StyleAttributes {
    align?: string;
    background?: string;
    color?: string;
}
export type StyleAttribute = keyof StyleAttributes;