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* Copyright 2019 Adobe. All rights reserved.
* This file is licensed to you 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 REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import {BaseComponent} from '../../../coral-base-component';
import {transform} from '../../../coral-utils';
import {Decorator} from '../../../coral-decorator';
const CLASSNAME = '_coral-Panel';
/**
@class Coral.Panel
@classdesc A Panel component
@htmltag coral-panel
@extends {HTMLElement}
@extends {BaseComponent}
*/
const Panel = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
constructor() {
super();
// Templates
this._elements = {
content: this.querySelector('coral-panel-content') || document.createElement('coral-panel-content')
};
}
/**
The content of the panel.
@type {PanelContent}
@contentzone
*/
get content() {
return this._getContentZone(this._elements.content);
}
set content(value) {
this._setContentZone('content', value, {
handle: 'content',
tagName: 'coral-panel-content',
insert: function (content) {
this.appendChild(content);
}
});
}
/**
Whether the item is selected. When true, the item will appear as the active element in the PanelStack. The item
must be a child of a PanelStack before this property is set to true. This property cannot be programmatically set
to false.
@type {Boolean}
@default false
@htmlattribute selected
@htmlattributereflected
*/
get selected() {
return this._selected || false;
}
set selected(value) {
let _selected = transform.booleanAttr(value);
if(this._selected === _selected) {
return;
}
this._selected = _selected;
this._reflectAttribute('selected', this._selected);
this.classList.toggle('is-selected', this._selected);
this.setAttribute('aria-hidden', !this.selected);
this.trigger('coral-panel:_selectedchanged');
}
get _contentZones() {
return {'coral-panel-content': 'content'};
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat(['selected']);
}
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// Adds the role to support accessibility when role is not already defined.
if (!this.hasAttribute('role')) {
this.setAttribute('role', 'region');
}
// Fetch the content zone elements
const content = this._elements.content;
// Move the content into the content zone if none specified
if (!content.parentNode) {
while (this.firstChild) {
content.appendChild(this.firstChild);
}
}
// Assign the content zone so the insert function will be called
this.content = content;
}
});
export default Panel;
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