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1 | import { fromEvent } from 'rxjs' |
2 | import { debounceTime } from 'rxjs/operators' | |
67ed6552 C |
3 | import { Injectable } from '@angular/core' |
4 | import { ScreenService } from '../wrappers' | |
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5 | |
6 | @Injectable() | |
7 | export class MenuService { | |
8 | isMenuDisplayed = true | |
9 | isMenuChangedByUser = false | |
8544d8f5 | 10 | menuWidth = 240 // should be kept equal to $menu-width |
3b20bdd6 | 11 | |
ac940348 | 12 | constructor ( |
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13 | private screenService: ScreenService |
14 | ) { | |
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15 | // Do not display menu on small or touch screens |
16 | if (this.screenService.isInSmallView() || this.screenService.isInTouchScreen()) { | |
17 | this.setMenuDisplay(false) | |
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18 | } |
19 | ||
245b9d27 | 20 | this.handleWindowResize() |
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21 | } |
22 | ||
23 | toggleMenu () { | |
245b9d27 | 24 | this.setMenuDisplay(!this.isMenuDisplayed) |
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25 | this.isMenuChangedByUser = true |
26 | } | |
27 | ||
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28 | setMenuDisplay (display: boolean) { |
29 | this.isMenuDisplayed = display | |
30 | ||
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31 | if (!this.screenService.isInTouchScreen()) return |
32 | ||
245b9d27 | 33 | // On touch screens, lock body scroll and display content overlay when memu is opened |
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34 | if (this.isMenuDisplayed) { |
35 | document.body.classList.add('menu-open') | |
36 | this.screenService.onFingerSwipe('left', () => { this.setMenuDisplay(false) }) | |
37 | return | |
245b9d27 | 38 | } |
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39 | |
40 | document.body.classList.remove('menu-open') | |
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41 | } |
42 | ||
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43 | onResize () { |
44 | this.isMenuDisplayed = window.innerWidth >= 800 && !this.isMenuChangedByUser | |
45 | } | |
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46 | |
47 | private handleWindowResize () { | |
48 | // On touch screens, do not handle window resize event since opened menu is handled with a content overlay | |
1bfc7b73 | 49 | if (this.screenService.isInTouchScreen()) return |
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50 | |
51 | fromEvent(window, 'resize') | |
52 | .pipe(debounceTime(200)) | |
53 | .subscribe(() => this.onResize()) | |
54 | } | |
3b20bdd6 | 55 | } |