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model.ts
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model.ts
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/********************************************************************************
* Copyright (c) 2019 EclipseSource 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 {
BoundsAware,
Hoverable,
hoverFeedbackFeature,
isBoundsAware,
isMoveable,
isSelectable,
Locateable,
SChildElement,
Selectable,
SModelElement,
SParentElement
} from "sprotty/lib";
export const resizeFeature = Symbol("resizeFeature");
export interface Resizable extends BoundsAware, Selectable {
}
export function isResizable(element: SModelElement): element is SParentElement & Resizable {
return isBoundsAware(element) && isSelectable(element) && element instanceof SParentElement && element.hasFeature(resizeFeature);
}
export enum ResizeHandleLocation {
TopLeft = "top-left",
TopRight = "top-right",
BottomLeft = "bottom-left",
BottomRight = "bottom-right"
}
export function isBoundsAwareMoveable(element: SModelElement): element is SModelElement & Locateable & BoundsAware {
return isMoveable(element) && isBoundsAware(element);
}
export class SResizeHandle extends SChildElement implements Hoverable {
static readonly TYPE = 'resize-handle';
type: string = SResizeHandle.TYPE;
hoverFeedback: boolean = false;
location?: ResizeHandleLocation;
constructor(location?: ResizeHandleLocation) {
super();
this.location = location;
}
hasFeature(feature: symbol): boolean {
return feature === hoverFeedbackFeature;
}
}
export function addResizeHandles(element: SParentElement) {
removeResizeHandles(element);
element.add(new SResizeHandle(ResizeHandleLocation.TopLeft));
element.add(new SResizeHandle(ResizeHandleLocation.TopRight));
element.add(new SResizeHandle(ResizeHandleLocation.BottomLeft));
element.add(new SResizeHandle(ResizeHandleLocation.BottomRight));
}
export function removeResizeHandles(element: SParentElement) {
element.removeAll(child => child instanceof SResizeHandle);
}