82 lines
2.4 KiB
JavaScript
82 lines
2.4 KiB
JavaScript
/**
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* @license
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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(function() {
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'use strict';
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Polymer({
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is: 'gr-external-style',
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_legacyUndefinedCheck: true,
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properties: {
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name: String,
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_urlsImported: {
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type: Array,
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value() { return []; },
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},
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_stylesApplied: {
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type: Array,
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value() { return []; },
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},
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},
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/**
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* @suppress {checkTypes}
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*/
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_import(url) {
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if (this._urlsImported.includes(url)) { return Promise.resolve(); }
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this._urlsImported.push(url);
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return new Promise((resolve, reject) => {
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(this.importHref || Polymer.importHref)(url, resolve, reject);
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});
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},
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_applyStyle(name) {
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if (this._stylesApplied.includes(name)) { return; }
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this._stylesApplied.push(name);
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// Hybrid custom-style syntax:
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// https://polymer-library.polymer-project.org/2.0/docs/devguide/style-shadow-dom
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const s = document.createElement('style', 'custom-style');
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s.setAttribute('include', name);
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const cs = document.createElement('custom-style');
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cs.appendChild(s);
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// When using Shadow DOM <custom-style> must be added to the <body>.
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// Within <gr-external-style> itself the styles would have no effect.
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const topEl = document.getElementsByTagName('body')[0];
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topEl.insertBefore(cs, topEl.firstChild);
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},
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_importAndApply() {
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Promise.all(Gerrit._endpoints.getPlugins(this.name).map(
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pluginUrl => this._import(pluginUrl))
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).then(() => {
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const moduleNames = Gerrit._endpoints.getModules(this.name);
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for (const name of moduleNames) {
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this._applyStyle(name);
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}
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});
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},
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attached() {
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this._importAndApply();
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},
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ready() {
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Gerrit.awaitPluginsLoaded().then(() => this._importAndApply());
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},
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});
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})();
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