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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, validate} from '../../../coral-utils';
import {Decorator} from '../../../coral-decorator';
import {Messenger} from '../../../coral-messenger';
/**
@class Coral.Select.Item
@classdesc A Select item component
@htmltag coral-select-item
@extends {HTMLElement}
@extends {BaseComponent}
*/
const SelectItem = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
constructor() {
super();
// messenger
this._messenger = new Messenger(this);
this._observer = new MutationObserver(this._handleMutation.bind(this));
this._observer.observe(this, {
characterData: true,
childList: true,
subtree: true
});
}
// @compat
get content() {
return this;
}
set content(value) {
// Support configs
if (typeof value === 'object') {
for (const prop in value) {
/** @ignore */
this[prop] = value[prop];
}
}
}
/**
Whether this item is disabled. When set to <code>true</code>, this will prevent every user interaction with the
item. If disabled is set to <code>true</code> for a selected item it will be deselected.
@type {Boolean}
@default false
@htmlattribute disabled
@htmlattributereflected
*/
get disabled() {
return this._disabled || false;
}
set disabled(value) {
value = transform.booleanAttr(value);
if(validate.valueMustChange(this._disabled, value)) {
this._disabled = value;
this._reflectAttribute('disabled', value);
this._messenger.postMessage('coral-select-item:_disabledchanged');
}
}
/**
Whether the item is selected. Selected cannot be set to <code>true</code> if the item is disabled.
@type {Boolean}
@default false
@htmlattribute selected
@htmlattributereflected
*/
get selected() {
return this._selected || false;
}
set selected(value) {
value = transform.booleanAttr(value);
if(validate.valueMustChange(this._selected, value)) {
this._selected = value;
this._reflectAttribute('selected', value);
this._messenger.postMessage('coral-select-item:_selectedchanged');
}
}
/**
Value of the item. If not explicitly set, the value of <code>Node.textContent</code> is returned.
@type {String}
@default ""
@htmlattribute value
@htmlattributereflected
*/
get value() {
let val = this._value;
if (typeof this._value === 'undefined') {
if (this.getAttribute('value') === null) {
// keep spaces to only 1 max and trim to mimic native select option behavior
val = this.textContent.replace(/\s{2,}/g, ' ').trim();
E} else {
val = this.getAttribute('value');
}
}
return val;
}
set value(value) {
value = transform.string(value);
if(validate.valueMustChange(this._value, value)) {
this._value = value;
this._reflectAttribute('value', value);
this._messenger.postMessage('coral-select-item:_valuechanged');
}
}
/**
Inherited from {@link BaseComponent#trackingElement}.
*/
get trackingElement() {
return typeof this._trackingElement === 'undefined' ?
// keep spaces to only 1 max and trim. this mimics native html behaviors
Ethis.value || this.textContent.replace(/\s{2,}/g, ' ').trim() :
this._trackingElement;
}
set trackingElement(value) {
super.trackingElement = value;
}
/** @private */
_handleMutation() {
this._messenger.postMessage('coral-select-item:_contentchanged', {
content: this.textContent
});
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat(['selected', 'disabled', 'value']);
}
/** @ignore */
_suspendCallback() {
super._suspendCallback();
this._messenger.disconnect();
}
/** @ignore */
_resumeCallback() {
this._messenger.connect();
super._resumeCallback();
}
/** @ignore */
connectedCallback() {
this._messenger.connect();
super.connectedCallback();
}
/** @ignore */
disconnectedCallback() {
super.disconnectedCallback();
this._messenger.disconnect();
}
});
export default SelectItem;
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