blob: a2c125362091fde970d6580e8727d182b210416c [file] [log] [blame]
/**
* @license
* Copyright (C) 2016 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 {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 {html} from '@polymer/polymer/lib/utils/html-tag';
import {customElement, property, observe} from '@polymer/decorators';
declare global {
interface HTMLElementTagNameMap {
'gr-select': GrSelect;
}
}
/**
* GrSelect `gr-select` component.
*/
@customElement('gr-select')
export class GrSelect extends GestureEventListeners(
LegacyElementMixin(PolymerElement)
) {
static get template() {
return html` <slot></slot> `;
}
@property({type: String, notify: true})
bindValue?: string;
get nativeSelect() {
// gr-select is not a shadow component
// TODO(taoalpha): maybe we should convert
// it into a shadow dom component instead
// TODO(TS): should warn if no `select` detected.
return this.querySelector('select')!;
}
@observe('bindValue')
_updateValue() {
// It's possible to have a value of 0.
if (this.bindValue !== undefined) {
// Set for chrome/safari so it happens instantly
this.nativeSelect.value = this.bindValue;
// Async needed for firefox to populate value. It was trying to do it
// before options from a dom-repeat were rendered previously.
// See https://bugs.chromium.org/p/gerrit/issues/detail?id=7735
this.async(() => {
// TODO(TS): maybe should check for undefined before assigning
// or fallback to ''
this.nativeSelect.value = this.bindValue!;
}, 1);
}
}
_valueChanged() {
this.bindValue = this.nativeSelect.value;
}
focus() {
this.nativeSelect.focus();
}
/** @override */
created() {
super.created();
this.addEventListener('change', () => this._valueChanged());
this.addEventListener('dom-change', () => this._updateValue());
}
/** @override */
ready() {
super.ready();
// If not set via the property, set bind-value to the element value.
if (this.bindValue === undefined && this.nativeSelect.options.length > 0) {
this.bindValue = this.nativeSelect.value;
}
}
}