/**
 * Copyright 2023-present DreamNum Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { DocumentDataModel, ITextRangeParam, Nullable } from '@univerjs/core';
import { RxDisposable } from '@univerjs/core';
import { DocSelectionManagerService, DocSkeletonManagerService } from '@univerjs/docs';
import * as EngineRender from '@univerjs/engine-render';
import { IEditorService } from '../../services/editor/editor-manager.service';
export declare class DocBackScrollRenderController extends RxDisposable implements EngineRender.IRenderModule {
    protected readonly _context: EngineRender.IRenderContext<DocumentDataModel>;
    private readonly _textSelectionManagerService;
    private readonly _editorService;
    private readonly _docSkeletonManagerService;
    private _pendingSelectionScrollFrame;
    private _suppressedSelection;
    private _pendingExplicitRange;
    private _selectionBeforeExplicitRange;
    private _scrollingToRange;
    constructor(_context: EngineRender.IRenderContext<DocumentDataModel>, _textSelectionManagerService: DocSelectionManagerService, _editorService: IEditorService, _docSkeletonManagerService: DocSkeletonManagerService);
    private _init;
    dispose(): void;
    private _suspendSelectionScroll;
    protected _cancelPendingSelectionScroll(): void;
    private _scheduleScrollToSelection;
    scrollToRange(range: ITextRangeParam, onResolved?: () => void): void;
    private _isSameRange;
    private _ownsPendingExplicitRange;
    private _clearExplicitRangeOwnership;
    private _scrollToRange;
    private _deferUnresolvedRange;
    private _scheduleScrollToReadyRange;
    private _isValidBodyOffset;
    isViewportReady(): boolean;
    private _scrollToPage;
    scrollToNode(startNodePosition: Nullable<EngineRender.INodePosition>): void;
    protected _getVerticalScrollDelta(top: number, height: number, boundTop: number, boundBottom: number, delta: number): number;
    protected _scrollToSelection(): void;
}