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* Copyright 2020 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 {SelectableCollection} from '../../../coral-collection';
import {transform, validate} from '../../../coral-utils';
// @compat
const CLASSNAME = 'coral-RadioGroup';
/**
Enumeration for {@link BaseFieldGroup} orientations.
@typedef {Object} BaseFieldGroupOrientationEnum
@property {String} HORIZONTAL
Horizontal default orientation.
@property {String} VERTICAL
Vertical orientation.
*/
const orientation = {
HORIZONTAL: 'horizontal',
VERTICAL: 'vertical'
};
/**
@base BaseFieldGroup
@classdesc The base element for FieldGroup components
*/
const BaseFieldGroup = (superClass) => class extends superClass {
/**
The Collection Interface that allows interacting with the items that the component contains.
@type {SelectableCollection}
@readonly
*/
get items() {
// Construct the collection on first request:
if (!this._items) {
this._items = new SelectableCollection({
itemTagName: this._itemTagName,
host: this
});
}
return this._items;
}
/**
Orientation of the field group. See {@link BaseFieldGroupOrientationEnum}.
@type {String}
@default BaseFieldGroupOrientationEnum.HORIZONTAL
@htmlattribute orientation
@htmlattributereflected
*/
get orientation() {
return this._orientation || orientation.HORIZONTAL;
}
set orientation(value) {
value = transform.string(value).toLowerCase();
value = validate.enumeration(this.constructor.orientation)(value) && value || orientation.HORIZONTAL;
this._reflectAttribute('orientation', value);
if(validate.valueMustChange(this._orientation, value)) {
this._orientation = value;
this.classList.toggle(`${CLASSNAME}--vertical`, value === orientation.VERTICAL);
}
}
/**
Returns the first selected field group item in the Field Group. The value <code>null</code> is returned if no item is
selected.
@type {HTMLElement}
@readonly
*/
get selectedItem() {
return this.items._getFirstSelected('checked');
}
/** @private */
get _itemTagName() {
// Used for Collection
return 'coral-fieldgroup-item';
}
/**
Returns {@link BaseFieldGroup} orientation options.
@return {BaseFieldGroupEnum}
*/
static get orientation() {
return orientation;
}
/** @iEgnore */
static get observedAttributes() {
return super.observedAttributes.concat(['orientation']);
}
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// a11y
this.setAttribute('role', 'group');
// Default reflected attributes
if (!this._orientation) {
this.orientation = orientation.HORIZONTAL;
}
}
};
export default BaseFieldGroup;
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