blob: f865e77beb0a56b1ebeb3ca7878a5641e43dffa1 [file] [log] [blame]
/**
* @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.
*/
(function() {
'use strict';
Polymer({
is: 'gr-external-style',
_legacyUndefinedCheck: true,
properties: {
name: String,
_urlsImported: {
type: Array,
value() { return []; },
},
_stylesApplied: {
type: Array,
value() { return []; },
},
},
/**
* @suppress {checkTypes}
*/
_import(url) {
if (this._urlsImported.includes(url)) { return Promise.resolve(); }
this._urlsImported.push(url);
return new Promise((resolve, reject) => {
(this.importHref || Polymer.importHref)(url, resolve, reject);
});
},
_applyStyle(name) {
if (this._stylesApplied.includes(name)) { return; }
this._stylesApplied.push(name);
// Hybrid custom-style syntax:
// https://polymer-library.polymer-project.org/2.0/docs/devguide/style-shadow-dom
const s = document.createElement('style', 'custom-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);
Polymer.updateStyles();
},
_importAndApply() {
Promise.all(Gerrit._endpoints.getPlugins(this.name).map(
pluginUrl => this._import(pluginUrl))
).then(() => {
const moduleNames = Gerrit._endpoints.getModules(this.name);
for (const name of moduleNames) {
this._applyStyle(name);
}
});
},
attached() {
this._importAndApply();
},
ready() {
Gerrit.awaitPluginsLoaded().then(() => this._importAndApply());
},
});
})();