src/splash.js

/*
 * OS.js - JavaScript Cloud/Web Desktop Platform
 *
 * Copyright (c) Anders Evenrud <andersevenrud@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author  Anders Evenrud <andersevenrud@gmail.com>
 * @license Simplified BSD License
 */

/**
 * Splash Screen UI
 */
export default class Splash {
  /**
   * Create Splash
   * @param {Core} core Core reference
   */
  constructor(core) {
    /**
     * Core instance reference
     * @type {Core}
     * @readonly
     */
    this.core = core;

    /**
     * Splash root element
     * @type {Element}
     * @readonly
     */
    this.$loading = document.createElement('div');
    this.$loading.className = 'osjs-boot-splash';

    core.on('osjs/core:boot', () => this.show());
    core.on('osjs/core:booted', () => this.destroy());
    core.on('osjs/core:logged-in', () => this.show());
    core.on('osjs/core:started', () => this.destroy());
  }

  /**
   * Initializes splash
   */
  init() {
    this.$loading.appendChild(document.createTextNode('Loading...'));
  }

  /**
   * Shows splash
   */
  show() {
    if (!this.$loading.parentNode) {
      this.core.$root.appendChild(this.$loading);
    }
  }

  /**
   * Destroys splash
   */
  destroy() {
    if (this.$loading.parentNode) {
      this.$loading.remove();
    }
  }
}