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import { fromEvent } from 'rxjs'
import { debounceTime } from 'rxjs/operators'
import { Injectable } from '@angular/core'
import { ScreenService } from '../wrappers'
@Injectable()
export class MenuService {
isMenuDisplayed = true
isMenuChangedByUser = false
menuWidth = 240 // should be kept equal to $menu-width
constructor (
private screenService: ScreenService
) {
// Do not display menu on small or touch screens
if (this.screenService.isInSmallView() || this.screenService.isInTouchScreen()) {
this.setMenuDisplay(false)
}
this.handleWindowResize()
}
toggleMenu () {
this.setMenuDisplay(!this.isMenuDisplayed)
this.isMenuChangedByUser = true
}
setMenuDisplay (display: boolean) {
this.isMenuDisplayed = display
if (!this.screenService.isInTouchScreen()) return
// On touch screens, lock body scroll and display content overlay when memu is opened
if (this.isMenuDisplayed) {
document.body.classList.add('menu-open')
this.screenService.onFingerSwipe('left', () => { this.setMenuDisplay(false) })
return
}
document.body.classList.remove('menu-open')
}
onResize () {
this.isMenuDisplayed = window.innerWidth >= 800 && !this.isMenuChangedByUser
}
private handleWindowResize () {
// On touch screens, do not handle window resize event since opened menu is handled with a content overlay
if (this.screenService.isInTouchScreen()) return
fromEvent(window, 'resize')
.pipe(debounceTime(200))
.subscribe(() => this.onResize())
}
}
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