Bootstrap/js/src/tooltip.js

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v5.1.3): tooltip.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import * as Popper from '@popperjs/core'
import {
  defineJQueryPlugin,
  findShadowRoot,
  getElement,
  getUID,
  isRTL,
  noop,
  typeCheckConfig
} from './util/index'
import { DefaultAllowlist } from './util/sanitizer'
import Data from './dom/data'
import EventHandler from './dom/event-handler'
import Manipulator from './dom/manipulator'
import BaseComponent from './base-component'
import TemplateFactory from './util/template-factory'

/**
 * Constants
 */

const NAME = 'tooltip'
const DATA_KEY = 'bs.tooltip'
const EVENT_KEY = `.${DATA_KEY}`
const CLASS_PREFIX = 'bs-tooltip'
const DISALLOWED_ATTRIBUTES = new Set(['sanitize', 'allowList', 'sanitizeFn'])

const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_MODAL = 'modal'
const CLASS_NAME_SHOW = 'show'

const HOVER_STATE_SHOW = 'show'
const HOVER_STATE_OUT = 'out'

const SELECTOR_TOOLTIP_ARROW = '.tooltip-arrow'
const SELECTOR_TOOLTIP_INNER = '.tooltip-inner'
const SELECTOR_MODAL = `.${CLASS_NAME_MODAL}`

const EVENT_MODAL_HIDE = 'hide.bs.modal'

const TRIGGER_HOVER = 'hover'
const TRIGGER_FOCUS = 'focus'
const TRIGGER_CLICK = 'click'
const TRIGGER_MANUAL = 'manual'

const AttachmentMap = {
  AUTO: 'auto',
  TOP: 'top',
  RIGHT: isRTL() ? 'left' : 'right',
  BOTTOM: 'bottom',
  LEFT: isRTL() ? 'right' : 'left'
}

const Default = {
  animation: true,
  template: '<div class="tooltip" role="tooltip">' +
              '<div class="tooltip-arrow"></div>' +
              '<div class="tooltip-inner"></div>' +
            '</div>',
  trigger: 'hover focus',
  title: '',
  delay: 0,
  html: false,
  selector: false,
  placement: 'top',
  offset: [0, 0],
  container: false,
  fallbackPlacements: ['top', 'right', 'bottom', 'left'],
  boundary: 'clippingParents',
  customClass: '',
  sanitize: true,
  sanitizeFn: null,
  allowList: DefaultAllowlist,
  popperConfig: null
}

const DefaultType = {
  animation: 'boolean',
  template: 'string',
  title: '(string|element|function)',
  trigger: 'string',
  delay: '(number|object)',
  html: 'boolean',
  selector: '(string|boolean)',
  placement: '(string|function)',
  offset: '(array|string|function)',
  container: '(string|element|boolean)',
  fallbackPlacements: 'array',
  boundary: '(string|element)',
  customClass: '(string|function)',
  sanitize: 'boolean',
  sanitizeFn: '(null|function)',
  allowList: 'object',
  popperConfig: '(null|object|function)'
}

const Event = {
  HIDE: `hide${EVENT_KEY}`,
  HIDDEN: `hidden${EVENT_KEY}`,
  SHOW: `show${EVENT_KEY}`,
  SHOWN: `shown${EVENT_KEY}`,
  INSERTED: `inserted${EVENT_KEY}`,
  CLICK: `click${EVENT_KEY}`,
  FOCUSIN: `focusin${EVENT_KEY}`,
  FOCUSOUT: `focusout${EVENT_KEY}`,
  MOUSEENTER: `mouseenter${EVENT_KEY}`,
  MOUSELEAVE: `mouseleave${EVENT_KEY}`
}

/**
 * Class definition
 */

class Tooltip extends BaseComponent {
  constructor(element, config) {
    if (typeof Popper === 'undefined') {
      throw new TypeError('Bootstrap\'s tooltips require Popper (https://popper.js.org)')
    }

    super(element)

    // Private
    this._isEnabled = true
    this._timeout = 0
    this._hoverState = ''
    this._activeTrigger = {}
    this._popper = null
    this._templateFactory = null

    // Protected
    this._config = this._getConfig(config)
    this.tip = null

    this._setListeners()
  }

  // Getters
  static get Default() {
    return Default
  }

  static get NAME() {
    return NAME
  }

  static get Event() {
    return Event
  }

  static get DefaultType() {
    return DefaultType
  }

  // Public
  enable() {
    this._isEnabled = true
  }

  disable() {
    this._isEnabled = false
  }

  toggleEnabled() {
    this._isEnabled = !this._isEnabled
  }

  toggle(event) {
    if (!this._isEnabled) {
      return
    }

    if (event) {
      const context = this._initializeOnDelegatedTarget(event)

      context._activeTrigger.click = !context._activeTrigger.click

      if (context._isWithActiveTrigger()) {
        context._enter(null, context)
      } else {
        context._leave(null, context)
      }
    } else {
      if (this.getTipElement().classList.contains(CLASS_NAME_SHOW)) {
        this._leave(null, this)
        return
      }

      this._enter(null, this)
    }
  }

  dispose() {
    clearTimeout(this._timeout)

    EventHandler.off(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler)

    if (this.tip) {
      this.tip.remove()
    }

    this._disposePopper()
    super.dispose()
  }

  show() {
    if (this._element.style.display === 'none') {
      throw new Error('Please use show on visible elements')
    }

    if (!(this.isWithContent() && this._isEnabled)) {
      return
    }

    const showEvent = EventHandler.trigger(this._element, this.constructor.Event.SHOW)
    const shadowRoot = findShadowRoot(this._element)
    const isInTheDom = shadowRoot === null ?
      this._element.ownerDocument.documentElement.contains(this._element) :
      shadowRoot.contains(this._element)

    if (showEvent.defaultPrevented || !isInTheDom) {
      return
    }

    const tip = this.getTipElement()

    this._element.setAttribute('aria-describedby', tip.getAttribute('id'))

    const placement = typeof this._config.placement === 'function' ?
      this._config.placement.call(this, tip, this._element) :
      this._config.placement

    const attachment = this._getAttachment(placement)
    this._addAttachmentClass(attachment)

    const { container } = this._config
    Data.set(tip, this.constructor.DATA_KEY, this)

    if (!this._element.ownerDocument.documentElement.contains(this.tip)) {
      container.append(tip)
      EventHandler.trigger(this._element, this.constructor.Event.INSERTED)
    }

    if (this._popper) {
      this._popper.update()
    } else {
      this._popper = Popper.createPopper(this._element, tip, this._getPopperConfig(attachment))
    }

    tip.classList.add(CLASS_NAME_SHOW)

    // If this is a touch-enabled device we add extra
    // empty mouseover listeners to the body's immediate children;
    // only needed because of broken event delegation on iOS
    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
    if ('ontouchstart' in document.documentElement) {
      for (const element of [].concat(...document.body.children)) {
        EventHandler.on(element, 'mouseover', noop)
      }
    }

    const complete = () => {
      const prevHoverState = this._hoverState

      this._hoverState = null
      EventHandler.trigger(this._element, this.constructor.Event.SHOWN)

      if (prevHoverState === HOVER_STATE_OUT) {
        this._leave(null, this)
      }
    }

    const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE)
    this._queueCallback(complete, this.tip, isAnimated)
  }

  hide() {
    if (!this._popper) {
      return
    }

    const tip = this.getTipElement()
    const complete = () => {
      if (this._isWithActiveTrigger()) {
        return
      }

      if (this._hoverState !== HOVER_STATE_SHOW) {
        tip.remove()
      }

      this._cleanTipClass()
      this._element.removeAttribute('aria-describedby')
      EventHandler.trigger(this._element, this.constructor.Event.HIDDEN)

      this._disposePopper()
    }

    const hideEvent = EventHandler.trigger(this._element, this.constructor.Event.HIDE)
    if (hideEvent.defaultPrevented) {
      return
    }

    tip.classList.remove(CLASS_NAME_SHOW)

    // If this is a touch-enabled device we remove the extra
    // empty mouseover listeners we added for iOS support
    if ('ontouchstart' in document.documentElement) {
      for (const element of [].concat(...document.body.children)) {
        EventHandler.off(element, 'mouseover', noop)
      }
    }

    this._activeTrigger[TRIGGER_CLICK] = false
    this._activeTrigger[TRIGGER_FOCUS] = false
    this._activeTrigger[TRIGGER_HOVER] = false

    const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE)
    this._queueCallback(complete, this.tip, isAnimated)
    this._hoverState = ''
  }

  update() {
    if (this._popper !== null) {
      this._popper.update()
    }
  }

  // Protected
  isWithContent() {
    return Boolean(this.getTitle())
  }

  getTipElement() {
    if (this.tip) {
      return this.tip
    }

    const templateFactory = this._getTemplateFactory(this._getContentForTemplate())

    const tip = templateFactory.toHtml()
    tip.classList.remove(CLASS_NAME_FADE, CLASS_NAME_SHOW)

    const tipId = getUID(this.constructor.NAME).toString()

    tip.setAttribute('id', tipId)

    if (this._config.animation) {
      tip.classList.add(CLASS_NAME_FADE)
    }

    this.tip = tip
    return this.tip
  }

  setContent(content) {
    let isShown = false
    if (this.tip) {
      isShown = this.tip.classList.contains(CLASS_NAME_SHOW)
      this.tip.remove()
    }

    this._disposePopper()

    this.tip = this._getTemplateFactory(content).toHtml()

    if (isShown) {
      this.show()
    }
  }

  _getTemplateFactory(content) {
    if (this._templateFactory) {
      this._templateFactory.changeContent(content)
    } else {
      this._templateFactory = new TemplateFactory({
        ...this._config,
        // the `content` var has to be after `this._config`
        // to override config.content in case of popover
        content,
        extraClass: this._resolvePossibleFunction(this._config.customClass)
      })
    }

    return this._templateFactory
  }

  _getContentForTemplate() {
    return {
      [SELECTOR_TOOLTIP_INNER]: this.getTitle()
    }
  }

  getTitle() {
    return this._resolvePossibleFunction(this._config.title) || this._element.getAttribute('title')
  }

  updateAttachment(attachment) {
    if (attachment === 'right') {
      return 'end'
    }

    if (attachment === 'left') {
      return 'start'
    }

    return attachment
  }

  // Private
  _initializeOnDelegatedTarget(event, context) {
    return context || this.constructor.getOrCreateInstance(event.delegateTarget, this._getDelegateConfig())
  }

  _getOffset() {
    const { offset } = this._config

    if (typeof offset === 'string') {
      return offset.split(',').map(val => Number.parseInt(val, 10))
    }

    if (typeof offset === 'function') {
      return popperData => offset(popperData, this._element)
    }

    return offset
  }

  _resolvePossibleFunction(arg) {
    return typeof arg === 'function' ? arg.call(this._element) : arg
  }

  _getPopperConfig(attachment) {
    const defaultBsPopperConfig = {
      placement: attachment,
      modifiers: [
        {
          name: 'flip',
          options: {
            fallbackPlacements: this._config.fallbackPlacements
          }
        },
        {
          name: 'offset',
          options: {
            offset: this._getOffset()
          }
        },
        {
          name: 'preventOverflow',
          options: {
            boundary: this._config.boundary
          }
        },
        {
          name: 'arrow',
          options: {
            element: SELECTOR_TOOLTIP_ARROW
          }
        },
        {
          name: 'onChange',
          enabled: true,
          phase: 'afterWrite',
          fn: data => this._handlePopperPlacementChange(data)
        }
      ],
      onFirstUpdate: data => {
        if (data.options.placement !== data.placement) {
          this._handlePopperPlacementChange(data)
        }
      }
    }

    return {
      ...defaultBsPopperConfig,
      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)
    }
  }

  _addAttachmentClass(attachment) {
    this.getTipElement().classList.add(`${this._getBasicClassPrefix()}-${this.updateAttachment(attachment)}`)
  }

  _getAttachment(placement) {
    return AttachmentMap[placement.toUpperCase()]
  }

  _setListeners() {
    const triggers = this._config.trigger.split(' ')

    for (const trigger of triggers) {
      if (trigger === 'click') {
        EventHandler.on(this._element, this.constructor.Event.CLICK, this._config.selector, event => this.toggle(event))
      } else if (trigger !== TRIGGER_MANUAL) {
        const eventIn = trigger === TRIGGER_HOVER ?
          this.constructor.Event.MOUSEENTER :
          this.constructor.Event.FOCUSIN
        const eventOut = trigger === TRIGGER_HOVER ?
          this.constructor.Event.MOUSELEAVE :
          this.constructor.Event.FOCUSOUT

        EventHandler.on(this._element, eventIn, this._config.selector, event => this._enter(event))
        EventHandler.on(this._element, eventOut, this._config.selector, event => this._leave(event))
      }
    }

    this._hideModalHandler = () => {
      if (this._element) {
        this.hide()
      }
    }

    EventHandler.on(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler)

    if (this._config.selector) {
      this._config = {
        ...this._config,
        trigger: 'manual',
        selector: ''
      }
    } else {
      this._fixTitle()
    }
  }

  _fixTitle() {
    const title = this._element.getAttribute('title')

    if (title && !this._element.getAttribute('aria-label') && !this._element.textContent) {
      this._element.setAttribute('aria-label', title)
    }
  }

  _enter(event, context) {
    context = this._initializeOnDelegatedTarget(event, context)

    if (event) {
      context._activeTrigger[
        event.type === 'focusin' ? TRIGGER_FOCUS : TRIGGER_HOVER
      ] = true
    }

    if (context.getTipElement().classList.contains(CLASS_NAME_SHOW) || context._hoverState === HOVER_STATE_SHOW) {
      context._hoverState = HOVER_STATE_SHOW
      return
    }

    clearTimeout(context._timeout)

    context._hoverState = HOVER_STATE_SHOW

    if (!context._config.delay || !context._config.delay.show) {
      context.show()
      return
    }

    context._timeout = setTimeout(() => {
      if (context._hoverState === HOVER_STATE_SHOW) {
        context.show()
      }
    }, context._config.delay.show)
  }

  _leave(event, context) {
    context = this._initializeOnDelegatedTarget(event, context)

    if (event) {
      context._activeTrigger[
        event.type === 'focusout' ? TRIGGER_FOCUS : TRIGGER_HOVER
      ] = context._element.contains(event.relatedTarget)
    }

    if (context._isWithActiveTrigger()) {
      return
    }

    clearTimeout(context._timeout)

    context._hoverState = HOVER_STATE_OUT

    if (!context._config.delay || !context._config.delay.hide) {
      context.hide()
      return
    }

    context._timeout = setTimeout(() => {
      if (context._hoverState === HOVER_STATE_OUT) {
        context.hide()
      }
    }, context._config.delay.hide)
  }

  _isWithActiveTrigger() {
    return Object.values(this._activeTrigger).includes(true)
  }

  _getConfig(config) {
    const dataAttributes = Manipulator.getDataAttributes(this._element)

    for (const dataAttr of Object.keys(dataAttributes)) {
      if (DISALLOWED_ATTRIBUTES.has(dataAttr)) {
        delete dataAttributes[dataAttr]
      }
    }

    config = {
      ...this.constructor.Default,
      ...dataAttributes,
      ...(typeof config === 'object' && config ? config : {})
    }

    config.container = config.container === false ? document.body : getElement(config.container)

    if (typeof config.delay === 'number') {
      config.delay = {
        show: config.delay,
        hide: config.delay
      }
    }

    if (typeof config.title === 'number') {
      config.title = config.title.toString()
    }

    if (typeof config.content === 'number') {
      config.content = config.content.toString()
    }

    typeCheckConfig(NAME, config, this.constructor.DefaultType)
    return config
  }

  _getDelegateConfig() {
    const config = {}

    for (const key in this._config) {
      if (this.constructor.Default[key] !== this._config[key]) {
        config[key] = this._config[key]
      }
    }

    // In the future can be replaced with:
    // const keysWithDifferentValues = Object.entries(this._config).filter(entry => this.constructor.Default[entry[0]] !== this._config[entry[0]])
    // `Object.fromEntries(keysWithDifferentValues)`
    return config
  }

  _cleanTipClass() {
    const tip = this.getTipElement()
    const basicClassPrefixRegex = new RegExp(`(^|\\s)${this._getBasicClassPrefix()}\\S+`, 'g')
    const tabClass = tip.getAttribute('class').match(basicClassPrefixRegex)
    if (tabClass !== null && tabClass.length > 0) {
      for (const tClass of tabClass.map(token => token.trim())) {
        tip.classList.remove(tClass)
      }
    }
  }

  _getBasicClassPrefix() {
    return CLASS_PREFIX
  }

  _handlePopperPlacementChange(popperData) {
    const { state } = popperData

    if (!state) {
      return
    }

    this.tip = state.elements.popper
    this._cleanTipClass()
    this._addAttachmentClass(this._getAttachment(state.placement))
  }

  _disposePopper() {
    if (this._popper) {
      this._popper.destroy()
      this._popper = null
    }
  }

  // Static

  static jQueryInterface(config) {
    return this.each(function () {
      const data = Tooltip.getOrCreateInstance(this, config)

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError(`No method named "${config}"`)
        }

        data[config]()
      }
    })
  }
}

/**
 * jQuery
 */

defineJQueryPlugin(Tooltip)

export default Tooltip