gruene-seele/resources/assets/vendor/js/layout-helpers.js
2021-01-08 17:48:20 +01:00

680 lines
18 KiB
JavaScript

// Constants
const TRANSITION_EVENTS = ['transitionend','webkitTransitionEnd','oTransitionEnd']
const TRANSITION_PROPERTIES = ['transition', 'MozTransition', 'webkitTransition', 'WebkitTransition', 'OTransition']
const INLINE_STYLE = `
.layout-fixed .layout-1 .layout-sidenav,
.layout-fixed-offcanvas .layout-1 .layout-sidenav {
top: {navbarHeight}px !important;
}
.layout-container {
padding-top: {navbarHeight}px !important;
}
.layout-content {
padding-bottom: {footerHeight}px !important;
}`
// Guard
function requiredParam(name) {
throw new Error(`Parameter required${name ? ': `' + name + '`' : ''}`)
}
const layoutHelpers = {
// Root container
CONTAINER: typeof window !== 'undefined' ? document.documentElement : null,
// Large screens breakpoint
LAYOUT_BREAKPOINT: 992,
// Resize delay in milliseconds
RESIZE_DELAY: 200,
// Internal variables
_curStyle: null,
_styleEl: null,
_resizeTimeout: null,
_resizeCallback: null,
_transitionCallback: null,
_transitionCallbackTimeout: null,
_listeners: [],
_initialized: false,
_autoUpdate: false,
_lastWindowHeight: 0,
// *******************************************************************************
// * Utilities
// ---
// Add class
_addClass(cls, el = this.CONTAINER) {
cls.split(' ').forEach(c => el.classList.add(c))
},
// ---
// Remove class
_removeClass(cls, el = this.CONTAINER) {
cls.split(' ').forEach(c => el.classList.remove(c))
},
// ---
// Has class
_hasClass(cls, el = this.CONTAINER) {
let result = false
cls.split(' ').forEach(c => {
if (el.classList.contains(c)) result = true
})
return result
},
// ---
// Check for transition support
_supportsTransitionEnd() {
if (window.QUnit) return false
const el = document.body || document.documentElement
if (!el) return false
let result = false
TRANSITION_PROPERTIES.forEach(evnt => {
if (typeof el.style[evnt] !== 'undefined') result = true
})
return result
},
// ---
// Get animation duration of element
_getAnimationDuration(el) {
let duration = window.getComputedStyle(el).transitionDuration
return parseFloat(duration) * (duration.indexOf('ms') !== -1 ? 1 : 1000)
},
// ---
// Trigger window event
_triggerWindowEvent(name) {
if (typeof window === 'undefined') return
if (document.createEvent) {
let event
if (typeof(Event) === 'function') {
event = new Event(name)
} else {
event = document.createEvent('Event')
event.initEvent(name, false, true)
}
window.dispatchEvent(event)
} else {
window.fireEvent(`on${name}`, document.createEventObject())
}
},
// ---
// Trigger event
_triggerEvent(name) {
this._triggerWindowEvent(`layout${name}`)
this._listeners
.filter(listener => listener.event === name)
.forEach(listener => listener.callback.call(null))
},
// ---
// Update style
_updateInlineStyle(navbarHeight = 0, footerHeight = 0) {
if (!this._styleEl) {
this._styleEl = document.createElement('style')
this._styleEl.type = 'text/css'
document.head.appendChild(this._styleEl)
}
const newStyle = INLINE_STYLE
.replace(/\{navbarHeight\}/ig, navbarHeight)
.replace(/\{footerHeight\}/ig, footerHeight)
if (this._curStyle !== newStyle) {
this._curStyle = newStyle
this._styleEl.textContent = newStyle
}
},
// ---
// Remove style
_removeInlineStyle() {
if (this._styleEl) document.head.removeChild(this._styleEl)
this._styleEl = null
this._curStyle = null
},
// ---
// Redraw layout sidenav (Safari bugfix)
_redrawLayoutSidenav() {
const layoutSidenav = this.getLayoutSidenav()
if (layoutSidenav && layoutSidenav.querySelector('.sidenav')) {
const inner = layoutSidenav.querySelector('.sidenav-inner')
const scrollTop = inner.scrollTop
const pageScrollTop = document.documentElement.scrollTop
layoutSidenav.style.display = 'none'
layoutSidenav.offsetHeight
layoutSidenav.style.display = ''
inner.scrollTop = scrollTop
document.documentElement.scrollTop = pageScrollTop
return true
}
return false
},
// ---
// Calculate current navbar height
_getNavbarHeight() {
const layoutNavbar = this.getLayoutNavbar()
if (!layoutNavbar) return 0
if (!this.isSmallScreen()) return layoutNavbar.getBoundingClientRect().height
// Needs some logic to get navbar height on small screens
const clonedEl = layoutNavbar.cloneNode(true)
clonedEl.id = null
clonedEl.style.visibility = 'hidden'
clonedEl.style.position = 'absolute'
Array.prototype.slice.call(clonedEl.querySelectorAll('.collapse.show'))
.forEach(el => this._removeClass('show', el))
layoutNavbar.parentNode.insertBefore(clonedEl, layoutNavbar)
const navbarHeight = clonedEl.getBoundingClientRect().height
clonedEl.parentNode.removeChild(clonedEl)
return navbarHeight
},
// ---
// Get current footer height
_getFooterHeight() {
const layoutFooter = this.getLayoutFooter()
if (!layoutFooter) return 0
return layoutFooter.getBoundingClientRect().height
},
// ---
// Add layout sivenav toggle animationEnd event
_bindLayoutAnimationEndEvent(modifier, cb) {
const sidenav = this.getSidenav()
const duration = sidenav ? this._getAnimationDuration(sidenav) + 50 : 0
if (!duration) {
modifier.call(this)
cb.call(this)
return
}
this._transitionCallback = e => {
if (e.target !== sidenav) return
this._unbindLayoutAnimationEndEvent()
cb.call(this)
}
TRANSITION_EVENTS.forEach(e => {
sidenav.addEventListener(e, this._transitionCallback, false)
})
modifier.call(this)
this._transitionCallbackTimeout = setTimeout(() => {
this._transitionCallback.call(this, { target: sidenav })
}, duration)
},
// ---
// Remove layout sivenav toggle animationEnd event
_unbindLayoutAnimationEndEvent() {
const sidenav = this.getSidenav()
if (this._transitionCallbackTimeout) {
clearTimeout(this._transitionCallbackTimeout)
this._transitionCallbackTimeout = null
}
if (sidenav && this._transitionCallback) {
TRANSITION_EVENTS.forEach(e => {
sidenav.removeEventListener(e, this._transitionCallback, false)
})
}
if (this._transitionCallback) {
this._transitionCallback = null
}
},
// ---
// Bind delayed window resize event
_bindWindowResizeEvent() {
this._unbindWindowResizeEvent()
const cb = () => {
if (this._resizeTimeout) {
clearTimeout(this._resizeTimeout)
this._resizeTimeout = null
}
this._triggerEvent('resize')
}
this._resizeCallback = () => {
if (this._resizeTimeout) clearTimeout(this._resizeTimeout)
this._resizeTimeout = setTimeout(cb, this.RESIZE_DELAY)
}
window.addEventListener('resize', this._resizeCallback, false)
},
// ---
// Unbind delayed window resize event
_unbindWindowResizeEvent() {
if (this._resizeTimeout) {
clearTimeout(this._resizeTimeout)
this._resizeTimeout = null
}
if (this._resizeCallback) {
window.removeEventListener('resize', this._resizeCallback, false)
this._resizeCallback = null
}
},
// ---
// Set sidenav hover state
_setSidenavHoverState(hovered) {
this[hovered ? '_addClass' : '_removeClass']('layout-sidenav-hover')
},
// ---
// Toggle collapsed
_setCollapsed(collapsed) {
if (this.isSmallScreen()) {
if (collapsed) {
this._removeClass('layout-expanded')
} else {
setTimeout(() => {
this._addClass('layout-expanded')
}, this._redrawLayoutSidenav() ? 5 : 0)
}
} else {
this[collapsed ? '_addClass' : '_removeClass']('layout-collapsed')
}
},
_findParent(el, cls) {
if (el && el.tagName.toUpperCase() === 'BODY') return null
el = el.parentNode
while (el && el.tagName.toUpperCase() !== 'BODY' && !el.classList.contains(cls)) {
el = el.parentNode
}
el = el && el.tagName.toUpperCase() !== 'BODY' ? el : null
return el
},
_bindSidenavMouseEvents() {
if (this._sidenavMouseEnter && this._sidenavMouseLeave && this._windowTouchStart) return
const layoutSidenav = this.getLayoutSidenav()
if (!layoutSidenav) return this._unbindSidenavMouseEvents()
if (!this._sidenavMouseEnter) {
this._sidenavMouseEnter = () => {
if (this.isSmallScreen() || !this._hasClass('layout-collapsed') ||
this.isOffcanvas() || this._hasClass('layout-transitioning')) {
return this._setSidenavHoverState(false)
}
this._setSidenavHoverState(true)
}
layoutSidenav.addEventListener('mouseenter', this._sidenavMouseEnter, false)
layoutSidenav.addEventListener('touchstart', this._sidenavMouseEnter, false)
}
if (!this._sidenavMouseLeave) {
this._sidenavMouseLeave = () => {
this._setSidenavHoverState(false)
}
layoutSidenav.addEventListener('mouseleave', this._sidenavMouseLeave, false)
}
if (!this._windowTouchStart) {
this._windowTouchStart = e => {
if (!e || !e.target || !this._findParent(e.target, '.layout-sidenav')) {
this._setSidenavHoverState(false)
}
}
window.addEventListener('touchstart', this._windowTouchStart, true)
}
},
_unbindSidenavMouseEvents() {
if (!this._sidenavMouseEnter && !this._sidenavMouseLeave && !this._windowTouchStart) return
const layoutSidenav = this.getLayoutSidenav()
if (this._sidenavMouseEnter) {
if (layoutSidenav) {
layoutSidenav.removeEventListener('mouseenter', this._sidenavMouseEnter, false)
layoutSidenav.removeEventListener('touchstart', this._sidenavMouseEnter, false)
}
this._sidenavMouseEnter = null
}
if (this._sidenavMouseLeave) {
if (layoutSidenav) {
layoutSidenav.removeEventListener('mouseleave', this._sidenavMouseLeave, false)
}
this._sidenavMouseLeave = null
}
if (this._windowTouchStart) {
if (layoutSidenav) {
window.addEventListener('touchstart', this._windowTouchStart, true)
}
this._windowTouchStart = null
}
this._setSidenavHoverState(false)
},
// *******************************************************************************
// * Getters
getLayoutSidenav() {
return document.querySelector('.layout-sidenav')
},
getSidenav() {
const layoutSidenav = this.getLayoutSidenav()
if (!layoutSidenav) return null
return !this._hasClass('sidenav', layoutSidenav) ?
layoutSidenav.querySelector('.sidenav') :
layoutSidenav
},
getLayoutNavbar() {
return document.querySelector('.layout-navbar')
},
getLayoutFooter() {
return document.querySelector('.layout-footer')
},
getLayoutContainer() {
return document.querySelector('.layout-container')
},
// *******************************************************************************
// * Tests
isMobileDevice() {
return (typeof window.orientation !== "undefined") || (navigator.userAgent.indexOf('IEMobile') !== -1)
},
isSmallScreen() {
return (
window.innerWidth ||
document.documentElement.clientWidth ||
document.body.clientWidth
) < this.LAYOUT_BREAKPOINT
},
isLayout1() {
return !!document.querySelector('.layout-wrapper.layout-1')
},
isCollapsed() {
if (this.isSmallScreen()) {
return !this._hasClass('layout-expanded')
} else {
return this._hasClass('layout-collapsed')
}
},
isFixed() {
return this._hasClass('layout-fixed layout-fixed-offcanvas')
},
isOffcanvas() {
return this._hasClass('layout-offcanvas layout-fixed-offcanvas')
},
isNavbarFixed() {
return this._hasClass('layout-navbar-fixed') ||
(!this.isSmallScreen() && this.isFixed() && this.isLayout1())
},
isFooterFixed() {
return this._hasClass('layout-footer-fixed')
},
isReversed() {
return this._hasClass('layout-reversed')
},
// *******************************************************************************
// * Methods
// ---
// Collapse / expand layout
setCollapsed(collapsed = requiredParam('collapsed'), animate = true) {
const layoutSidenav = this.getLayoutSidenav()
if (!layoutSidenav) return
this._unbindLayoutAnimationEndEvent()
if (animate && this._supportsTransitionEnd()) {
this._addClass('layout-transitioning')
if (collapsed) this._setSidenavHoverState(false)
this._bindLayoutAnimationEndEvent(() => {
// Collapse / Expand
this._setCollapsed(collapsed)
}, () => {
this._removeClass('layout-transitioning')
this._triggerWindowEvent('resize')
this._triggerEvent('toggle')
this._setSidenavHoverState(false)
})
} else {
this._addClass('layout-no-transition')
if (collapsed) this._setSidenavHoverState(false)
// Collapse / Expand
this._setCollapsed(collapsed)
setTimeout(() => {
this._removeClass('layout-no-transition')
this._triggerWindowEvent('resize')
this._triggerEvent('toggle')
this._setSidenavHoverState(false)
}, 1)
}
},
// ---
// Toggle layout
toggleCollapsed(animate = true) {
this.setCollapsed(!this.isCollapsed(), animate)
},
// ---
// Set layout positioning
setPosition(fixed = requiredParam('fixed'), offcanvas = requiredParam('offcanvas')) {
this._removeClass('layout-offcanvas layout-fixed layout-fixed-offcanvas')
if (!fixed && offcanvas) {
this._addClass('layout-offcanvas')
} else if (fixed && !offcanvas) {
this._addClass('layout-fixed')
this._redrawLayoutSidenav()
} else if (fixed && offcanvas) {
this._addClass('layout-fixed-offcanvas')
this._redrawLayoutSidenav()
}
this.update()
},
setNavbarFixed(fixed = requiredParam('fixed')) {
this[fixed ? '_addClass' : '_removeClass']('layout-navbar-fixed')
this.update()
},
setFooterFixed(fixed = requiredParam('fixed')) {
this[fixed ? '_addClass' : '_removeClass']('layout-footer-fixed')
this.update()
},
setReversed(reversed = requiredParam('reversed')) {
this[reversed ? '_addClass' : '_removeClass']('layout-reversed')
},
// *******************************************************************************
// * Update
update() {
if (
(this.getLayoutNavbar() && (
(!this.isSmallScreen() && this.isLayout1() && this.isFixed()) || this.isNavbarFixed()
)) || (this.getLayoutFooter() && this.isFooterFixed())
) {
this._updateInlineStyle(this._getNavbarHeight(), this._getFooterHeight())
}
this._bindSidenavMouseEvents()
},
setAutoUpdate(enable = requiredParam('enable')) {
if (enable && !this._autoUpdate) {
this.on('resize.layoutHelpers:autoUpdate', () => this.update())
this._autoUpdate = true
} else if (!enable && this._autoUpdate) {
this.off('resize.layoutHelpers:autoUpdate')
this._autoUpdate = false
}
},
// *******************************************************************************
// * Events
on(event = requiredParam('event'), callback = requiredParam('callback')) {
let [_event, ...namespace] = event.split('.')
namespace = namespace.join('.') || null
this._listeners.push({ event: _event, namespace, callback })
},
off(event = requiredParam('event')) {
let [_event, ...namespace] = event.split('.')
namespace = namespace.join('.') || null
this._listeners
.filter(listener => listener.event === _event && listener.namespace === namespace)
.forEach(listener => this._listeners.splice(this._listeners.indexOf(listener), 1))
},
// *******************************************************************************
// * Life cycle
init() {
if (this._initialized) return
this._initialized = true
// Initialize `style` element
this._updateInlineStyle(0)
// Bind window resize event
this._bindWindowResizeEvent()
// Bind init event
this.off('init._layoutHelpers')
this.on('init._layoutHelpers', () => {
this.off('resize._layoutHelpers:redrawSidenav')
this.on('resize._layoutHelpers:redrawSidenav', () => {
this.isSmallScreen() && !this.isCollapsed() && this._redrawLayoutSidenav()
})
// Force repaint in IE 10
if (typeof document.documentMode === 'number' && document.documentMode < 11) {
this.off('resize._layoutHelpers:ie10RepaintBody')
this.on('resize._layoutHelpers:ie10RepaintBody', () => {
if (this.isFixed()) return
const scrollTop = document.documentElement.scrollTop
document.body.style.display = 'none'
document.body.offsetHeight
document.body.style.display = 'block'
document.documentElement.scrollTop = scrollTop
})
}
})
this._triggerEvent('init')
},
destroy() {
if (!this._initialized) return
this._initialized = false
this._removeClass('layout-transitioning')
this._removeInlineStyle()
this._unbindLayoutAnimationEndEvent()
this._unbindWindowResizeEvent()
this._unbindSidenavMouseEvents()
this.setAutoUpdate(false)
this.off('init._layoutHelpers')
// Remove all listeners except `init`
this._listeners
.filter(listener => listener.event !== 'init')
.forEach(listener => this._listeners.splice(this._listeners.indexOf(listener), 1))
}
}
// *******************************************************************************
// * Initialization
if (typeof window !== 'undefined') {
layoutHelpers.init()
if (layoutHelpers.isMobileDevice() && window.chrome) {
document.documentElement.classList.add('layout-sidenav-100vh')
}
// Update layout after page load
if (document.readyState === 'complete') layoutHelpers.update()
else document.addEventListener('DOMContentLoaded', function onContentLoaded() {
layoutHelpers.update()
document.removeEventListener('DOMContentLoaded', onContentLoaded)
})
}
// ---
export { layoutHelpers }