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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 {DragAction} from '../../../coral-dragaction';
import '../../../coral-component-checkbox';
import quickactions from '../templates/quickactions';
import {transform, commons, validate, i18n} from '../../../coral-utils';
import MasonryItemAccessibilityState from './MasonryItemAccessibilityState';
import {Messenger} from '../../../coral-messenger';
import {Decorator} from '../../../coral-decorator';
const CLASSNAME = '_coral-Masonry-item';
/** @ignore */
const isMacLike = /(Mac|iPhone|iPod|iPad)/i.test(window.navigator.platform);
/**
@class Coral.Masonry.Item
@classdesc A Masonry Item component
@htmltag coral-masonry-item
@extends {HTMLElement}
@extends {BaseComponent}
*/
const MasonryItem = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
constructor() {
super();
// messenger
this._messenger = new Messenger(this);
// Represents ownership (necessary when the item is moved which triggers callbacks)
this._masonry = null;
// Default value
this._dragAction = null;
// Template
this._elements = {};
quickactions.call(this._elements);
}
// @compat
get content() {
return this;
}
set content(value) {
// Support configs
if (typeof value === 'object') {
for (const prop in value) {
/** @ignore */
this[prop] = value[prop];
}
}
}
/**
Specify while disconnecting the item, should it show transition or not.
This is useful when replacing large items, this result in delay.
@type {Boolean}
@default true
@private No need to update in public document.
*/E
get showRemoveTransition() {
return !(this._showRemoveTransition === false);
}
set showRemoveTransition(value) {
this._showRemoveTransition = transform.boolean(value);
}
/**
Specify whether the item is in removing state or not.
@type {Boolean}
*/
get removing() {
return this.hasAttribute('_removing');
}
/**
Whether the item is selected.
@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.trigger('coral-masonry-item:_selecteditemchanged');
this.setAttribute('aria-selected', value);
this.classList.toggle('is-selected', value);
this._elements.check[value ? 'setAttribute' : 'removeAttribute']('checked', '');
this._messenger.postMessage('coral-masonry-item:_selectedchanged');
}
}
/**
Animates the insertion of the item.
@private
*/
_insert() {
if (this.classList.contains('is-beforeInserting')) {
this.classList.remove('is-beforeInserting');
this.classList.add('is-inserting');
commons.transitionEnd(this, () => {
this.classList.remove('is-inserting');
});
}
}
/** @private */
_setTabbable(tabbable) {
this.setAttribute('tabindex', tabbable ? 0 : -1);
}
/** @private */
_updateDragAction(enabled) {
let handle;
if (enabled) {
// Find handle
if (this.getAttribute('coral-masonry-draghandle') !== null) {
handle = this;
} else {
handle = this.querySelector('[coral-masonry-draghandle]');
if (!handle) {
// Disable drag&drop if handle wasn't found
enabled = false;
}
}
}
if (enabled) {
if (!this._dragAction) {
this._dragAction = new DragAction(this);
this._dragAction.dropZone = this.parentNode;
}
this._dragAction.handle = handle;
} else if (this._dragAction) {
this._dragAction.destroy();
this._dragAction = null;
}
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat(['selected', '_removing', '_orderable']);
}
/** @ignore */
attributeChangedCallback(name, oldValue, value) {
if (name === '_removing') {
// Do it in the next frame so that the removing animation is visible
window.requestAnimationFrame(() => {
this.classList.toggle('is-removing', value !== null);
});
} else if (name === '_orderable') {
this._updateDragAction(value !== null);
} else {
super.attributeChangedCallback(name, oldValue, value);
}
}
/** @ignore */
_suspendCallback() {
super._suspendCallback();
this._messenger.disconnect();
}I
/** @ignore */
_resumeCallback() {
this._messenger.connect();
super._resumeCallback();
// In case an already connected element is switched to new parent,
// we would be ignoring the connected callback,
// as the item will be connected to new parent, the new parent should be informed immediately
this._messenger.postMessage('coral-masonry-item:_connected');
}
/** @ignore */
connectedCallback() {
thisE._messenger.connect();
super.connectedCallback();
// Inform masonry immediately
this._messenger.postMessage('coral-masonry-item:_connected');
}I
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// @a11y
this.setAttribute('tabindex', '-1');
// @a11y Add live region element to ensure announcement of selected state
const accessibilityState = this._elements.accessibilityState || this.querySelector('coral-masonry-item-accessibilitystate') || new MasonryItemAccessibilityState();
// @a11y Style to be visually hidden yet accessible to screen readers
if (!accessibilityState.classList.contains('u-coral-screenReaderOnly')) {
accessibilityState.classList.add('u-coral-screenReaderOnly');
}
// @a11y accessibility state string should announce in document lang, rather than item lang.
accessibilityState.setAttribute('lang', i18n.locale);
// @a11y accessibility state has role="status" to announce as a live region
accessibilityState.setAttribute('role', 'status');
accessibilityState.setAttribute('aria-live', 'off');
accessibilityState.hidden = true;
accessibilityState.id = accessibilityState.id || commons.getUID();
// @a11y Wait a frame and append live region content element so that it is the last child within item.
// wait for next macrotask to avoid appending the accessibility state element before quickactions.
setTimeout(() => {
if (!accessibilityState.parentNode) {
this.appendChild(accessibilityState);
}
// @a11y Item should be labelled by accessibility state.
if (isMacLike) {
const ariaLabelledby = this.getAttribute('aria-labelledby');
if (ariaLabelledby) {
this.setAttribute('aria-labelledby', ariaLabelledby + ' ' + accessibilityState.id);
}
}
});
this._elements.accessibilityState = accessibilityState;
// Support cloneNode
const template = this.querySelector('._coral-Masonry-item-quickActions');
if (template) {
template.remove();
}
this.insertBefore(this._elements.quickactions, this.firstChild);
// todo workaround to not give user possibility to tab into checkbox
this._elements.check._labellableElement.tabIndex = -1;
this._elements.check.setAttribute('aria-hidden', 'true');
}
/** @ignore */
disconnectedCallback() {
super.disconnectedCallback();
// disconnect messenger before calling masonry._onItemDisconnected
this._messenger.disconnect();
// Handle it in masonry immediately
const masonry = this._masonry;
if (masonry) {
masonry._onItemDisconnected(this);
}
}
});
export default MasonryItem;
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