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/** * @copyright (C) 2018 Open Source Matters, Inc.
* @license GNU General Public License version 2 or later; see LICENSE.txt */ window.customElements.define('joomla-toolbar-button', class extends HTMLElement { // Attribute getters get task() { return this.getAttribute('task'); } get listSelection() { return this.hasAttribute('list-selection'); } get form() { return this.getAttribute('form'); } get formValidation() { return this.hasAttribute('form-validation'); } get confirmMessage() { return this.getAttribute('confirm-message'); } /** * Lifecycle */ constructor() { super(); if (!Joomla) { throw new Error('Joomla API is not properly initiated'); } this.onChange = this.onChange.bind(this); this.executeTask = this.executeTask.bind(this); } /** * Lifecycle */ connectedCallback() { // We need a button to support button behavior, // because we cannot currently extend HTMLButtonElement this.buttonElement = this.querySelector('button, a'); this.buttonElement.addEventListener('click', this.executeTask); // Check whether we have a form const formSelector = this.form || 'adminForm'; this.formElement = document.getElementById(formSelector); this.disabled = false; // If list selection is required, set button to disabled by default if (this.listSelection) { this.setDisabled(true); } if (this.listSelection) { if (!this.formElement) { throw new Error(`The form "${formSelector}" is required to perform the task, but the form was not found on the page.`); } // Watch on list selection this.formElement.boxchecked.addEventListener('change', this.onChange); } } /** * Lifecycle */ disconnectedCallback() { if (this.formElement.boxchecked) { this.formElement.boxchecked.removeEventListener('change', this.onChange); } this.buttonElement.removeEventListener('click', this.executeTask); } onChange({ target }) { // Check whether we have selected something this.setDisabled(target.value < 1); } setDisabled(disabled) { // Make sure we have a boolean value this.disabled = !!disabled; // Switch attribute for native element // An anchor does not support "disabled" attribute, so use class if (this.buttonElement) { if (this.disabled) { if (this.buttonElement.nodeName === 'BUTTON') { this.buttonElement.disabled = true; } else { this.buttonElement.classList.add('disabled'); } } else if (this.buttonElement.nodeName === 'BUTTON') { this.buttonElement.disabled = false; } else { this.buttonElement.classList.remove('disabled'); } } } executeTask() { if (this.disabled) { return false; } // eslint-disable-next-line no-restricted-globals if (this.confirmMessage && !confirm(this.confirmMessage)) { return false; } if (this.task) { Joomla.submitbutton(this.task, this.form, this.formValidation); } return true; } });