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/**
* @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 {getPluginEndpoints} from '../../shared/gr-js-api-interface/gr-plugin-endpoints';
import {getPluginLoader} from '../../shared/gr-js-api-interface/gr-plugin-loader';
import {LitElement, html} from 'lit';
import {customElement, property, state} from 'lit/decorators';
@customElement('gr-external-style')
export class GrExternalStyle extends LitElement {
// This is a required value for this component.
@property({type: String})
name!: string;
// private but used in test
@state() stylesApplied: string[] = [];
override render() {
return html`<slot></slot>`;
}
// private but used in test
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();
}
private importAndApply() {
const moduleNames = getPluginEndpoints().getModules(this.name);
for (const name of moduleNames) {
this.applyStyle(name);
}
}
override connectedCallback() {
super.connectedCallback();
this.importAndApply();
getPluginLoader()
.awaitPluginsLoaded()
.then(() => this.importAndApply());
}
}
declare global {
interface HTMLElementTagNameMap {
'gr-external-style': GrExternalStyle;
}
}
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