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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 '../../shared/gr-js-api-interface/gr-js-api-interface.js';
import {updateStyles} from '@polymer/polymer/lib/mixins/element-mixin.js';
import {GestureEventListeners} from '@polymer/polymer/lib/mixins/gesture-event-listeners.js';
import {LegacyElementMixin} from '@polymer/polymer/lib/legacy/legacy-element-mixin.js';
import {PolymerElement} from '@polymer/polymer/polymer-element.js';
import {htmlTemplate} from './gr-external-style_html.js';
import {getPluginEndpoints} from '../../shared/gr-js-api-interface/gr-plugin-endpoints.js';
import {pluginLoader} from '../../shared/gr-js-api-interface/gr-plugin-loader.js';
/** @extends PolymerElement */
class GrExternalStyle extends GestureEventListeners(
LegacyElementMixin(
PolymerElement)) {
static get template() { return htmlTemplate; }
static get is() { return 'gr-external-style'; }
static get properties() {
return {
name: String,
_stylesApplied: {
type: Array,
value() { return []; },
},
};
}
_applyStyle(name) {
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() {
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();
pluginLoader.awaitPluginsLoaded().then(() => this._importAndApply());
}
}
customElements.define(GrExternalStyle.is, GrExternalStyle);