bootstrap-italia
Version:
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
249 lines (215 loc) • 7.47 kB
JavaScript
import BaseComponent from './base-component.js'
import EventHandler from './dom/event-handler'
import SelectorEngine from './dom/selector-engine'
import Manipulator from './dom/manipulator'
import onDocumentScroll from './util/on-document-scroll'
import NavBarCollapsible from './navbar-collapsible'
import { documentScrollTo } from './util/tween'
const NAME = 'navscroll'
const CLASS_NAME_ACTIVE = 'active'
const SELECTOR_NAVSCROLL = '[data-bs-navscroll]' //'.it-navscroll-wrapper'
const SELECTOR_LIST = 'ul.link-list'
const SELECTOR_LINK_CONTAINER = 'li.nav-link, li.nav-item'
const SELECTOR_LINK = 'a.nav-link'
const SELECTOR_LINK_ACTIVE = `${SELECTOR_LINK}.${CLASS_NAME_ACTIVE}`
const SELECTOR_LINK_CLICKABLE = `${SELECTOR_LINK}[href^="#"]`
const SELECTOR_CONTAINER = '.it-page-sections-container'
const SELECTOR_PAGE_SECTION = '.it-page-section'
const SELECTOR_TOGGLER = '.custom-navbar-toggler'
const SELECTOR_TOGGLER_ICON = '.it-list'
const SELECTOR_COLLAPSIBLE = '.navbar-collapsable'
const SELECTOR_PROGRESS_BAR = '.it-navscroll-progressbar'
const Default = {
scrollPadding: 10,
duration: 800,
easing: 'easeInOutSine',
}
class NavScroll extends BaseComponent {
constructor(element, config) {
super(element)
this._config = this._getConfig(config)
this._togglerElement = SelectorEngine.findOne(SELECTOR_TOGGLER, this._element)
this._sectionContainer = SelectorEngine.findOne(SELECTOR_CONTAINER)
this._collapsible = this._getCollapsible()
this._isCollapseOpened = false
this._callbackQueue = []
this._scrollCb = null
this._bindEvents()
}
// Getters
static get NAME() {
return NAME
}
// Public
setScrollPadding(scrollPadding) {
this._config.scrollPadding = scrollPadding
}
dispose() {
if (this._scrollCb) {
this._scrollCb.dispose()
}
super.dispose()
}
// Private
_getConfig(config) {
config = {
...Default,
...Manipulator.getDataAttributes(this._element),
...(typeof config === 'object' ? config : {}),
}
return config
}
_bindEvents() {
this._scrollCb = onDocumentScroll(() => this._onScroll())
if (this._collapsible) {
EventHandler.on(this._collapsible._element, 'shown.bs.navbarcollapsible', () => this._onCollapseOpened())
EventHandler.on(this._collapsible._element, 'hidden.bs.navbarcollapsible', () => this._onCollapseClosed())
}
SelectorEngine.find(SELECTOR_LINK_CLICKABLE, this._element).forEach((link) => {
link.addEventListener('click', () => {
const scrollHash = () => this._scrollToHash(link.hash)
if (this._isCollapseOpened) {
this._callbackQueue.push(scrollHash)
this._collapsible.hide()
} else {
scrollHash()
}
})
})
if (typeof window !== 'undefined' && typeof document !== 'undefined') {
EventHandler.on(window, 'load', () => {
//if page is already scrolled
setTimeout(() => this._onScroll(), 150)
})
}
}
_onCollapseOpened() {
this._isCollapseOpened = true
}
_onCollapseClosed() {
while (this._callbackQueue.length > 0) {
const cb = this._callbackQueue.shift()
if (typeof cb === 'function') {
cb()
}
}
this._isCollapseOpened = false
}
_getParentLinks(element) {
const parents = []
let parentContainer = element.closest(SELECTOR_LIST)
let parentContainerPrev = null
let exit = false
while (parentContainer && !exit) {
const parentLinkContainer = parentContainer.closest(SELECTOR_LINK_CONTAINER)
if (parentLinkContainer) {
const link = parentLinkContainer.querySelector(SELECTOR_LINK)
if (link) {
parents.push(link)
}
}
parentContainerPrev = parentContainer
parentContainer = (parentContainer.parentElement || parentContainer).closest(SELECTOR_LIST) //avoid self select of closest
if (parentContainer === parentContainerPrev) {
exit = true
}
}
return parents
}
_decorateToggler(text) {
if (this._togglerElement) {
const icon = SelectorEngine.findOne(SELECTOR_TOGGLER_ICON, this._togglerElement)
this._togglerElement.innerText = ''
this._togglerElement.textContent = ''
this._togglerElement.append(icon)
this._togglerElement.append(text)
}
}
_scrollToHash(hash) {
const target = SelectorEngine.findOne(hash, this._sectionContainer)
if (target) {
documentScrollTo(target.offsetTop - this._getScrollPadding(), {
duration: this._config.duration,
easing: this._config.easing,
/*complete: () => {
},*/
})
if (history.pushState) {
history.pushState(null, null, hash)
} else {
location.hash = hash
}
}
}
_updateProgress(content) {
if (!content) {
return
}
const progressBars = SelectorEngine.find(SELECTOR_PROGRESS_BAR)
if (progressBars) {
const offset = Math.abs(content.getBoundingClientRect().top)
const height = content.getBoundingClientRect().height
const scrollAmount = (offset / height) * 100
const scrollValue = Math.min(100, Math.max(0, scrollAmount))
progressBars.forEach((progressBar) => {
if (content.getBoundingClientRect().top <= 0) {
progressBar.style.width = scrollValue + '%'
progressBar.setAttribute('aria-valuenow', scrollValue)
} else {
progressBar.style.width = 0 + '%'
progressBar.setAttribute('aria-valuenow', 0)
}
})
}
}
_onScroll() {
const sectionsContainerTop = this._sectionContainer ? this._sectionContainer.offsetTop : 0
if (typeof document === 'undefined') {
return
}
const scrollDistance = document.scrollingElement.scrollTop - sectionsContainerTop
const navItems = SelectorEngine.find(SELECTOR_LINK, this._element)
const scrollPadding = this._getScrollPadding()
SelectorEngine.find(SELECTOR_PAGE_SECTION).forEach((pageSec, idx) => {
if (pageSec.offsetTop - sectionsContainerTop <= scrollDistance + scrollPadding) {
SelectorEngine.find(SELECTOR_LINK_ACTIVE, this._element).forEach((link) => {
link.classList.remove(CLASS_NAME_ACTIVE)
})
if (idx < navItems.length) {
const currActive = navItems[idx]
this._getParentLinks(currActive).forEach((parentLink) => {
parentLink.classList.add(CLASS_NAME_ACTIVE)
})
currActive.classList.add(CLASS_NAME_ACTIVE)
this._decorateToggler(currActive.innerText)
}
}
})
this._updateProgress(this._sectionContainer)
}
_getCollapsible() {
const coll = SelectorEngine.findOne(SELECTOR_COLLAPSIBLE, this._element)
if (coll) {
return NavBarCollapsible.getOrCreateInstance(coll)
}
return null
}
_getScrollPadding() {
if (typeof this._config.scrollPadding === 'function') {
return this._config.scrollPadding()
}
return this._config.scrollPadding
}
}
/**
* ------------------------------------------------------------------------
* Data Api implementation
* ------------------------------------------------------------------------
*/
if (typeof window !== 'undefined' && typeof document !== 'undefined') {
const navs = SelectorEngine.find(SELECTOR_NAVSCROLL)
navs.map((nav) => {
NavScroll.getOrCreateInstance(nav)
})
}
export default NavScroll