Proyectos de Subversion Moodle

/**

 * --------------------------------------------------------------------------

 * Bootstrap collapse.js

 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)

 * --------------------------------------------------------------------------

 */

import BaseComponent from './base-component'

import EventHandler from './dom/event-handler'

import SelectorEngine from './dom/selector-engine'

import {

  defineJQueryPlugin,

  getElement,

  reflow

} from './util/index'

/**

 * Constants

 */

const NAME = 'collapse'

const DATA_KEY = 'bs.collapse'

const EVENT_KEY = `.${DATA_KEY}`

const DATA_API_KEY = '.data-api'

const EVENT_SHOW = `show${EVENT_KEY}`

const EVENT_SHOWN = `shown${EVENT_KEY}`

const EVENT_HIDE = `hide${EVENT_KEY}`

const EVENT_HIDDEN = `hidden${EVENT_KEY}`

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

const CLASS_NAME_SHOW = 'show'

const CLASS_NAME_COLLAPSE = 'collapse'

const CLASS_NAME_COLLAPSING = 'collapsing'

const CLASS_NAME_COLLAPSED = 'collapsed'

const CLASS_NAME_DEEPER_CHILDREN = `:scope .${CLASS_NAME_COLLAPSE} .${CLASS_NAME_COLLAPSE}`

const CLASS_NAME_HORIZONTAL = 'collapse-horizontal'

const WIDTH = 'width'

const HEIGHT = 'height'

const SELECTOR_ACTIVES = '.collapse.show, .collapse.collapsing'

const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="collapse"]'

const Default = {

  parent: null,

  toggle: true

}

const DefaultType = {

  parent: '(null|element)',

  toggle: 'boolean'

}

/**

 * Class definition

 */

class Collapse extends BaseComponent {

  constructor(element, config) {

    super(element, config)

    this._isTransitioning = false

    this._triggerArray = []

    const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE)

    for (const elem of toggleList) {

      const selector = SelectorEngine.getSelectorFromElement(elem)

      const filterElement = SelectorEngine.find(selector)

        .filter(foundElement => foundElement === this._element)

      if (selector !== null && filterElement.length) {

        this._triggerArray.push(elem)

      }

    }

    this._initializeChildren()

    if (!this._config.parent) {

      this._addAriaAndCollapsedClass(this._triggerArray, this._isShown())

    }

    if (this._config.toggle) {

      this.toggle()

    }

  }

  // Getters

  static get Default() {

    return Default

  }

  static get DefaultType() {

    return DefaultType

  }

  static get NAME() {

    return NAME

  }

  // Public

  toggle() {

    if (this._isShown()) {

      this.hide()

    } else {

      this.show()

    }

  }

  show() {

    if (this._isTransitioning || this._isShown()) {

      return

    }

    let activeChildren = []

    // find active children

    if (this._config.parent) {

      activeChildren = this._getFirstLevelChildren(SELECTOR_ACTIVES)

        .filter(element => element !== this._element)

        .map(element => Collapse.getOrCreateInstance(element, { toggle: false }))

    }

    if (activeChildren.length && activeChildren[0]._isTransitioning) {

      return

    }

    const startEvent = EventHandler.trigger(this._element, EVENT_SHOW)

    if (startEvent.defaultPrevented) {

      return

    }

    for (const activeInstance of activeChildren) {

      activeInstance.hide()

    }

    const dimension = this._getDimension()

    this._element.classList.remove(CLASS_NAME_COLLAPSE)

    this._element.classList.add(CLASS_NAME_COLLAPSING)

    this._element.style[dimension] = 0

    this._addAriaAndCollapsedClass(this._triggerArray, true)

    this._isTransitioning = true

    const complete = () => {

      this._isTransitioning = false

      this._element.classList.remove(CLASS_NAME_COLLAPSING)

      this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)

      this._element.style[dimension] = ''

      EventHandler.trigger(this._element, EVENT_SHOWN)

    }

    const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1)

    const scrollSize = `scroll${capitalizedDimension}`

    this._queueCallback(complete, this._element, true)

    this._element.style[dimension] = `${this._element[scrollSize]}px`

  }

  hide() {

    if (this._isTransitioning || !this._isShown()) {

      return

    }

    const startEvent = EventHandler.trigger(this._element, EVENT_HIDE)

    if (startEvent.defaultPrevented) {

      return

    }

    const dimension = this._getDimension()

    this._element.style[dimension] = `${this._element.getBoundingClientRect()[dimension]}px`

    reflow(this._element)

    this._element.classList.add(CLASS_NAME_COLLAPSING)

    this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)

    for (const trigger of this._triggerArray) {

      const element = SelectorEngine.getElementFromSelector(trigger)

      if (element && !this._isShown(element)) {

        this._addAriaAndCollapsedClass([trigger], false)

      }

    }

    this._isTransitioning = true

    const complete = () => {

      this._isTransitioning = false

      this._element.classList.remove(CLASS_NAME_COLLAPSING)

      this._element.classList.add(CLASS_NAME_COLLAPSE)

      EventHandler.trigger(this._element, EVENT_HIDDEN)

    }

    this._element.style[dimension] = ''

    this._queueCallback(complete, this._element, true)

  }

  _isShown(element = this._element) {

    return element.classList.contains(CLASS_NAME_SHOW)

  }

  // Private

  _configAfterMerge(config) {

    config.toggle = Boolean(config.toggle) // Coerce string values

    config.parent = getElement(config.parent)

    return config

  }

  _getDimension() {

    return this._element.classList.contains(CLASS_NAME_HORIZONTAL) ? WIDTH : HEIGHT

  }

  _initializeChildren() {

    if (!this._config.parent) {

      return

    }

    const children = this._getFirstLevelChildren(SELECTOR_DATA_TOGGLE)

    for (const element of children) {

      const selected = SelectorEngine.getElementFromSelector(element)

      if (selected) {

        this._addAriaAndCollapsedClass([element], this._isShown(selected))

      }

    }

  }

  _getFirstLevelChildren(selector) {

    const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent)

    // remove children if greater depth

    return SelectorEngine.find(selector, this._config.parent).filter(element => !children.includes(element))

  }

  _addAriaAndCollapsedClass(triggerArray, isOpen) {

    if (!triggerArray.length) {

      return

    }

    for (const element of triggerArray) {

      element.classList.toggle(CLASS_NAME_COLLAPSED, !isOpen)

      element.setAttribute('aria-expanded', isOpen)

    }

  }

  // Static

  static jQueryInterface(config) {

    const _config = {}

    if (typeof config === 'string' && /show|hide/.test(config)) {

      _config.toggle = false

    }

    return this.each(function () {

      const data = Collapse.getOrCreateInstance(this, _config)

      if (typeof config === 'string') {

        if (typeof data[config] === 'undefined') {

          throw new TypeError(`No method named "${config}"`)

        }

        data[config]()

      }

    })

  }

}

/**

 * Data API implementation

 */

EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {

  // preventDefault only for <a> elements (which change the URL) not inside the collapsible element

  if (event.target.tagName === 'A' || (event.delegateTarget && event.delegateTarget.tagName === 'A')) {

    event.preventDefault()

  }

  for (const element of SelectorEngine.getMultipleElementsFromSelector(this)) {

    Collapse.getOrCreateInstance(element, { toggle: false }).toggle()

  }

})

/**

 * jQuery

 */

defineJQueryPlugin(Collapse)

export default Collapse