| /** |
| * @license |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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 {IronOverlayBehavior} from '@polymer/iron-overlay-behavior/iron-overlay-behavior'; |
| import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class'; |
| import {PolymerElement} from '@polymer/polymer/polymer-element'; |
| import {Constructor} from '../../utils/common-util'; |
| |
| // The mixinBehaviors clears all type information about superClass. |
| // As a workaround, we define IronOverlayMixin with correct type. |
| // Due to the following issues: |
| // https://github.com/microsoft/TypeScript/issues/15870 |
| // https://github.com/microsoft/TypeScript/issues/9944 |
| // we have to import IronOverlayBehavior in the same file where IronOverlayMixin |
| // is used. To ensure that this import can't be avoided, the second parameter |
| // is added. Usage example: |
| // class Element extends IronOverlayMixin(PolymerElement, IronOverlayBehavior as IronOverlayBehavior) |
| // The code 'IronOverlayBehavior as IronOverlayBehavior' required, because |
| // IronOverlayBehavior defined as an object, not as IronOverlayBehavior instance. |
| export const IronOverlayMixin = <T extends Constructor<PolymerElement>>( |
| superClass: T, |
| _: IronOverlayBehavior |
| ): T & Constructor<IronOverlayBehavior> => |
| // TODO(TS): mixinBehaviors in some lib is returning: `new () => T` |
| // instead which will fail the type check due to missing |
| // IronOverlayBehavior interface |
| mixinBehaviors([IronOverlayBehavior], superClass) as any; |
