| /** |
| * @license |
| * Copyright (C) 2017 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 {updateStyles} from '@polymer/polymer/lib/mixins/element-mixin'; |
| import {PolymerElement} from '@polymer/polymer/polymer-element'; |
| import {htmlTemplate} from './gr-external-style_html'; |
| import {getPluginEndpoints} from '../../shared/gr-js-api-interface/gr-plugin-endpoints'; |
| import {getPluginLoader} from '../../shared/gr-js-api-interface/gr-plugin-loader'; |
| import {customElement, property} from '@polymer/decorators'; |
| |
| @customElement('gr-external-style') |
| export class GrExternalStyle extends PolymerElement { |
| static get template() { |
| return htmlTemplate; |
| } |
| |
| // This is a required value for this component. |
| @property({type: String}) |
| name!: string; |
| |
| @property({type: Array}) |
| _stylesApplied: string[] = []; |
| |
| _applyStyle(name: string) { |
| if (this._stylesApplied.includes(name)) { |
| return; |
| } |
| this._stylesApplied.push(name); |
| |
| const s = document.createElement('style'); |
| s.setAttribute('include', name); |
| const cs = document.createElement('custom-style'); |
| cs.appendChild(s); |
| // When using Shadow DOM <custom-style> must be added to the <body>. |
| // Within <gr-external-style> itself the styles would have no effect. |
| const topEl = document.getElementsByTagName('body')[0]; |
| topEl.insertBefore(cs, topEl.firstChild); |
| updateStyles(); |
| } |
| |
| _importAndApply() { |
| const moduleNames = getPluginEndpoints().getModules(this.name); |
| for (const name of moduleNames) { |
| this._applyStyle(name); |
| } |
| } |
| |
| override connectedCallback() { |
| super.connectedCallback(); |
| this._importAndApply(); |
| } |
| |
| override ready() { |
| super.ready(); |
| getPluginLoader() |
| .awaitPluginsLoaded() |
| .then(() => this._importAndApply()); |
| } |
| } |
| |
| declare global { |
| interface HTMLElementTagNameMap { |
| 'gr-external-style': GrExternalStyle; |
| } |
| } |
