bootstrap-italia/src/js/plugins/dimmer.js

Bootstrap Italia è un tema Bootstrap 5 per la creazione di applicazioni web nel pieno rispetto delle linee guida di design per i siti internet e i servizi digitali della PA

/**
 * --------------------------------------------------------------------------
 * Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
 * Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
 * Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import BaseComponent from './base-component.js'

import { reflow, getElementFromSelector } from './util/index'
import EventHandler from './dom/event-handler'

const NAME = 'dimmer'
const DATA_KEY = 'bs.dimmer'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'

const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`

const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_SHOW = 'show'

const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="dimmer"]'
const SELECTOR_DATA_ARIAHIDDEN = '[aria-hidden=true]'

class Dimmer extends BaseComponent {
  constructor(element) {
    super(element)

    this._isShown = !element.matches(SELECTOR_DATA_ARIAHIDDEN)
    this._isTransitioning = false
  }

  // Getters

  static get NAME() {
    return NAME
  }

  // Public

  show() {
    if (this._isShown || this._isTransitioning) {
      return
    }

    this._isShown = true

    if (this._isAnimated()) {
      this._isTransitioning = true
    }

    this._showElement()
  }

  hide() {
    if (!this._isShown || this._isTransitioning) {
      return
    }

    this._isShown = false
    const isAnimated = this._isAnimated()

    if (isAnimated) {
      this._isTransitioning = true
    }

    this._element.classList.remove(CLASS_NAME_SHOW)

    this._queueCallback(() => this._hideElement(), this._element, isAnimated)
  }

  //Private

  _isAnimated() {
    return this._element.classList.contains(CLASS_NAME_FADE)
  }

  _showElement() {
    const isAnimated = this._isAnimated()

    //this._element.style.display = 'flex'
    this._element.removeAttribute('aria-hidden')
    //this._element.setAttribute('aria-modal', true)
    //this._element.setAttribute('role', 'dialog')

    if (isAnimated) {
      reflow(this._element)
    }

    this._element.classList.add(CLASS_NAME_SHOW)

    const transitionComplete = () => {
      this._isTransitioning = false
    }

    this._queueCallback(transitionComplete, this._element, isAnimated)
  }

  _hideElement() {
    //this._element.style.display = 'none'
    this._element.setAttribute('aria-hidden', true)
    //this._element.removeAttribute('aria-modal')
    //this._element.removeAttribute('role')
    this._isTransitioning = false
  }
}

/**
 * ------------------------------------------------------------------------
 * Data Api implementation
 * ------------------------------------------------------------------------
 */

if (typeof window !== 'undefined' && typeof document !== 'undefined') {
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function () {
    const dimmerElement = getElementFromSelector(this)
    const dimmer = Dimmer.getOrCreateInstance(dimmerElement)

    this.checked ? dimmer.show() : dimmer.hide()
  })
}

export default Dimmer