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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 '../../../coral-component-button';
import item from '../templates/item';
import {DragAction} from '../../../coral-dragaction';
import {i18n, transform, commons} from '../../../coral-utils';
import {Decorator} from '../../../coral-decorator';
const CLASSNAME = '_coral-Multifield-item';
/**
@class Coral.Multifield.Item
@classdesc A Multifield item component. It can have a pre-filled content different from the Multifield template but
added items will always be rendered based on the template.
@htmltag coral-multifield-item
@extends {HTMLElement}
@extends {BaseComponent}
*/
const MultifieldItem = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
constructor() {
super();
// Prepare templates
this._elements = {
// Create or fetch the content zones
content: this.querySelector('coral-multifield-item-content') || document.createElement('coral-multifield-item-content')
};
const uid = this.id || commons.getUID();
this.setAttribute('id', uid);
this._elements.content.setAttribute('id', `${uid}-content`);
item.call(this._elements, {i18n, uid});
}
/**
The item content.
@type {MultifieldItemContent}
@contentzone
*/
get content() {
return this._getContentZone(this._elements.content);
}
set content(value) {
this._setContentZone('content', value, {
handle: 'content',
tagName: 'coral-multifield-item-content',
insert: function (content) {
// Insert the content zone before the move and remove buttons
this.insertBefore(content, this.firstChild);
}
});
}
/**
Specify whether the remove button is in disabled state or not.
@type {Boolean}
@default false
@private
*/
get _deletable() {
return typeof this.__deletable === 'boolean' ? this.__deletable : true;
}
set _deletable(value) {
value = transform.boolean(value);
this.__deletable = value;
if(!this._readOnly) {
this._elements.remove.disabled = !value;
}
}
/**
Whether the item is set to be reorder using the keyboard
@type {boolean}
@private
*/
get _dragging() {
return this.__dragging || false;
}
set _dragging(value) {
this.__dragging = transform.boolean(value);
if (this.__dragging) {
// Setting role="application" to the move button forces
// NVDA and JAWS screen readers into forms mode,
// so arrow keys can be used to reorder.
this._elements.move.setAttribute('role', 'application');
} else {
// when reordering stops, restore the default role for the move button
this._elements.move.removeAttribute('role');
}
// aria-grabbed, may be deprecated in WAI-ARIA 1.1, but it is still reported by NVDA as "draggable" or "dragging"
this._elements.move.setAttribute('aria-grabbed', this.__dragging);
this._elements.move.setAttribute('aria-pressed', this.__dragging);
this._elements.move.selected = this.__dragging;
}
/**
Whether this multifieldItem is readOnly or not. Indicating that the user cannot modify the value of the multifieldItem fields.
@type {Boolean}
@default false
@private
*/
get _readOnly() {
return this.__readOnly || false;
}
set _readOnly(value) {
value = transform.booleanAttr(value);
this.__readOnly = value;
this._reflectAttribute('_readonly', value);
// get all fields and set readonly to those whose has this property
let allFields = this.querySelectorAll("*");
Array.prototype.forEach.call(allFields, (field) => {
if(typeof field.readOnly === "boolean") {
field.readOnly = value;
}
});
this._elements.move.disabled = value;
this._elements.remove.disabled = value;
this._elements.reorderup.disabled = value;
this._elements.reorderdown.disabled = value;
}
get _contentZones() {
return {'coral-multifield-item-content': 'content'};
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat([
'_readonly'
]);
}
/** @ignore */
static get _attributePropertyMap() {
return commons.extend(super._attributePropertyMap, {
_readonly: '_readOnly',
});
}
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// a11y
this.setAttribute('role', 'listitem');
// Create a fragment
const fragment = document.createDocumentFragment();
const templateHandleNames = ['move', 'remove', 'reorderup', 'reorderdown'];
// Render the main template
fragment.appendChild(this._elements.remove);
fragment.appendChild(this._elements.move);
fragment.appendChild(this._elements.reorderup);
fragment.appendChild(this._elements.reorderdown);
const content = this._elements.content;
// Remove it so we can process children
if (content.parentNode) {
this.removeChild(content);
}
// Process remaining elements as necessary
while (this.firstChild) {
const child = this.firstChild;
if (child.nodeType === Node.TEXT_NODE ||
child.nodeType === Node.ELEMENT_NODE && templateHandleNames.indexOf(child.getAttribute('handle')) === -1) {
// Add non-template elements to the label
content.appendChild(child);
} else {
// Remove anything else
this.removeChild(child);
}
}
// Add the frag to the component
this.appendChild(fragment);
// Assign the content zones, moving them into place in the process
this.content = content;
// Attach drag events
const dragAction = new DragAction(this);
dragAction.axis = 'vertical';
dragAction.handle = this._elements.move;
dragAction.scroll = true;
dragAction.useScrollParent = true;
}
});
export default MultifieldItem;
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