/********************************************************************************
 * Copyright (c) 2023-2024 Business Informatics Group (TU Wien) and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/
import { Action, Bounds, DOMHelper, GModelElement, GModelRoot, IActionDispatcher, IActionHandler, ICommand, MoveViewportAction, Point, Viewport } from '@eclipse-glsp/sprotty';
import { EditorContextService } from '../../base/editor-context-service';
import { FocusTracker } from '../../base/focus/focus-tracker';
import { IDiagramStartup } from '../../base/model/diagram-loader';
import { SelectableBoundsAware } from '../../utils/gmodel-util';
import { ZoomAction } from './zoom-viewport-action';
/**
 * Focuses the graph on different actions.
 */
export declare class RestoreViewportHandler implements IActionHandler, IDiagramStartup {
    protected domHelper: DOMHelper;
    protected focusTracker: FocusTracker;
    protected editorContext: EditorContextService;
    handle(action: Action): void | Action;
    get graphSelector(): string;
    postRequestModel(): Promise<void>;
    protected focusGraph(): void;
    protected waitForElement(selector: string): Promise<Element | null>;
}
/**
 * Handles moving the viewport.
 */
export declare class MoveViewportHandler implements IActionHandler {
    protected readonly editorContextService: EditorContextService;
    handle(action: MoveViewportAction): void | Action | ICommand;
    protected handleMoveViewport(action: MoveViewportAction): Action | undefined;
}
export declare class ZoomHandler implements IActionHandler {
    protected readonly editorContextService: EditorContextService;
    protected readonly actionDispatcher: IActionDispatcher;
    handle(action: ZoomAction): Action | void;
    protected handleZoomViewport(zoomFactor: number): Action | undefined;
    protected handleZoomElement(elementIds: string[], zoomFactor: number): Action | undefined;
    protected getCenter(viewport: GModelRoot & Viewport, selectedElements: SelectableBoundsAware[]): Point;
    protected boundsInViewport(viewport: GModelRoot & Viewport, element: GModelElement, bounds: Bounds): Bounds;
}
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