/** * @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 '../../shared/gr-js-api-interface/gr-js-api-interface'; import {updateStyles} from '@polymer/polymer/lib/mixins/element-mixin'; import {GestureEventListeners} from '@polymer/polymer/lib/mixins/gesture-event-listeners'; import {LegacyElementMixin} from '@polymer/polymer/lib/legacy/legacy-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') class GrExternalStyle extends GestureEventListeners( LegacyElementMixin(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 must be added to the . // Within itself the styles would have no effect. const topEl = document.getElementsByTagName('body')[0]; topEl.insertBefore(cs, topEl.firstChild); updateStyles(); } _importAndApply() { getPluginEndpoints() .getAndImportPlugins(this.name) .then(() => { const moduleNames = getPluginEndpoints().getModules(this.name); for (const name of moduleNames) { this._applyStyle(name); } }); } /** @override */ attached() { super.attached(); this._importAndApply(); } /** @override */ ready() { super.ready(); getPluginLoader() .awaitPluginsLoaded() .then(() => this._importAndApply()); } } declare global { interface HTMLElementTagNameMap { 'gr-external-style': GrExternalStyle; } }