import type { DeltaInsert } from '../types.js';
import type { DeltaEntry, VRange } from '../types.js';
import type { BaseTextAttributes } from '../utils/index.js';
import type { VEditor } from '../virgo.js';
export declare class VirgoDeltaService<TextAttributes extends BaseTextAttributes> {
    private readonly _editor;
    constructor(editor: VEditor<TextAttributes>);
    get deltas(): DeltaInsert<TextAttributes>[];
    mapDeltasInVRange: <Result>(vRange: VRange, callback: (delta: DeltaInsert<TextAttributes>, index: number) => Result) => Result[];
    /**
     * Here are examples of how this function computes and gets the delta.
     *
     * We have such a text:
     * ```
     * [
     *   {
     *      insert: 'aaa',
     *      attributes: { bold: true },
     *   },
     *   {
     *      insert: 'bbb',
     *      attributes: { italic: true },
     *   },
     * ]
     * ```
     *
     * `getDeltaByRangeIndex(0)` returns `{ insert: 'aaa', attributes: { bold: true } }`.
     *
     * `getDeltaByRangeIndex(1)` returns `{ insert: 'aaa', attributes: { bold: true } }`.
     *
     * `getDeltaByRangeIndex(3)` returns `{ insert: 'aaa', attributes: { bold: true } }`.
     *
     * `getDeltaByRangeIndex(4)` returns `{ insert: 'bbb', attributes: { italic: true } }`.
     */
    getDeltaByRangeIndex: (rangeIndex: number) => DeltaInsert<TextAttributes> | null;
    /**
     * Here are examples of how this function computes and gets the deltas.
     *
     * We have such a text:
     * ```
     * [
     *   {
     *      insert: 'aaa',
     *      attributes: { bold: true },
     *   },
     *   {
     *      insert: 'bbb',
     *      attributes: { italic: true },
     *   },
     *   {
     *      insert: 'ccc',
     *      attributes: { underline: true },
     *   },
     * ]
     * ```
     *
     * `getDeltasByVRange({ index: 0, length: 0 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }]]
     * ```
     *
     * `getDeltasByVRange({ index: 0, length: 1 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }]]
     * ```
     *
     * `getDeltasByVRange({ index: 0, length: 4 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }],
     *  [{ insert: 'bbb', attributes: { italic: true }, }, { index: 3, length: 3, }]]
     * ```
     *
     * `getDeltasByVRange({ index: 3, length: 1 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }],
     *  [{ insert: 'bbb', attributes: { italic: true }, }, { index: 3, length: 3, }]]
     * ```
     *
     * `getDeltasByVRange({ index: 3, length: 3 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }],
     *  [{ insert: 'bbb', attributes: { italic: true }, }, { index: 3, length: 3, }]]
     * ```
     *
     *  `getDeltasByVRange({ index: 3, length: 4 })` returns
     * ```
     * [{ insert: 'aaa', attributes: { bold: true }, }, { index: 0, length: 3, }],
     *  [{ insert: 'bbb', attributes: { italic: true }, }, { index: 3, length: 3, }],
     *  [{ insert: 'ccc', attributes: { underline: true }, }, { index: 6, length: 3, }]]
     * ```
     */
    getDeltasByVRange: (vRange: VRange) => DeltaEntry<TextAttributes>[];
    render: () => Promise<void>;
}
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