all files / component/mouse-dragdrop/ mouse-dragdrop-cursor.component.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
 
 
 
 
 
 
 
 
1×
1×
1×
 
1×
 
 
 
 
 
 
 
 
 
1×
1×
1×
2×
2×
 
 
 
2×
 
2×
2×
 
2×
5×
 
4×
4×
 
 
2×
 
 
2×
5×
5×
 
3×
1×
1×
 
3×
 
 
 
3×
3×
 
 
 
2×
5×
5×
 
2×
2×
2×
2×
 
2×
 
2×
 
2×
1×
1×
1×
1×
1×
 
 
1×
1×
 
 
 
 
 
2×
1×
 
 
 
2×
5×
 
5×
2×
 
 
5×
 
 
 
 
 
 
5×
 
3×
2×
 
 
 
 
 
2×
2×
 
2×
 
 
 
1×
9×
 
 
1×
12×
 
 
1×
2×
 
1×
 
 
/*
 *  @license
 *  Copyright Hôpitaux Universitaires de Genève. All Rights Reserved.
 *
 *  Use of this source code is governed by an Apache-2.0 license that can be
 *  found in the LICENSE file at https://github.com/DSI-HUG/dejajs-components/blob/master/LICENSE
 */
 
import { Component, ElementRef, OnDestroy, ViewChild, ViewEncapsulation } from '@angular/core';
import { BehaviorSubject, from as observableFrom } from 'rxjs';
import { delay, filter, takeWhile, tap } from 'rxjs/operators';
import { Position } from './../../common/core/graphics/position';
import { DejaMouseDragDropService, IDragCursorInfos, IDropCursorInfos } from './mouse-dragdrop.service';
 
@Component({
    encapsulation: ViewEncapsulation.None,
    selector: 'deja-mouse-dragdrop-cursor',
    styles: [
        require('./mouse-dragdrop-cursor.component.scss'),
    ],
    template: require('./mouse-dragdrop-cursor.component.html'),
})
export class DejaMouseDragDropCursorComponent implements OnDestroy {
    @ViewChild('block') private icon: ElementRef;
    @ViewChild('content') private content: ElementRef;
    private position$ = new BehaviorSubject<Position>(undefined);
    private cursor$ = new BehaviorSubject<IDragCursorInfos>(undefined);
    private _dragCursor: IDragCursorInfos;
    private _currentCursor: IDragCursorInfos;
    private _dropCursor: IDropCursorInfos;
    private isAlive = true;
 
    constructor(elementRef: ElementRef, private dragDropService: DejaMouseDragDropService) {
        const element = elementRef.nativeElement as HTMLElement;
 
        observableFrom(this.position$).pipe(
            takeWhile(() => this.isAlive))
            .subscribe((pos) => {
                element.style.left = pos ? `${pos.left}px` : '-1000px';
                element.style.top = pos ? `${pos.top}px` : '-1000px';
            });
 
        const cursor$ = observableFrom(this.cursor$);
 
        // Hide
        cursor$.pipe(
            takeWhile(() => this.isAlive),
            filter((dragCursor) => !dragCursor),
            tap((dragCursor) => {
                if (this._currentCursor && this.contentElement && this.iconElement) {
                    this.contentElement.style.opacity = '0';
                    this.iconElement.style.opacity = '0';
                }
                this._currentCursor = dragCursor;
            }),
            delay(300))
            .subscribe(() => {
                this.position$.next(null);
                element.style.display = 'none';
            });
 
        // Show
        cursor$.pipe(
            takeWhile(() => this.isAlive),
            filter((dragCursor) => !!dragCursor),
            tap((dragCursor) => {
                element.style.display = '';
                Eif (this.contentElement && this.iconElement) {
                    this.contentElement.style.opacity = '0';
                    this.iconElement.style.opacity = '0';
                }
                this._currentCursor = dragCursor;
            }),
            filter((dragCursor) => !dragCursor.className || dragCursor.className !== 'hidden'),
            tap((dragCursor) => {
                if (!!dragCursor.html) {
                    element.className = dragCursor.className;
                    Eif (this.contentElement && this.iconElement) {
                        this.contentElement.innerHTML = dragCursor.html;
                        this.contentElement.style.width = `${dragCursor.width || 48}px`;
                        this.contentElement.style.height = `${dragCursor.height || 48}px`;
                    }
                } else {
                    Eif (this.iconElement) {
                        this.iconElement.style.opacity = '1';
                    }
                }
            }),
            delay(1))
            .subscribe((dragCursor) => {
                if (!!dragCursor.html && this.contentElement) {
                    this.contentElement.style.opacity = '1';
                }
            });
 
        observableFrom(this.dragDropService.dragCursor$).pipe(
            takeWhile(() => this.isAlive))
            .subscribe((dragCursor) => {
                if (!!dragCursor !== !!this._dragCursor) {
                    this._dragCursor = dragCursor;
                }
 
                Iif (this._dropCursor && this._dragCursor) {
                    dragCursor.className = this._dropCursor.className || this._dragCursor.className;
                    dragCursor.html = this._dropCursor.html || this._dragCursor.html;
                    dragCursor.width = this._dropCursor.width || this._dragCursor.width;
                    dragCursor.height = this._dropCursor.height || this._dragCursor.height;
                }
 
                if (!!dragCursor !== !!this._currentCursor || (dragCursor && !!dragCursor.html !== !!this._currentCursor.html)) {
                    // Update Content
                    this.cursor$.next(dragCursor);
                } else Iif (dragCursor) {
                    // Update only Position
                    this.position$.next(dragCursor.position);
                }
            });
 
        observableFrom(this.dragDropService.dropCursor$).pipe(
            takeWhile(() => this.isAlive))
            .subscribe((dropCursor) => {
                this._dropCursor = dropCursor;
            });
    }
 
    private get iconElement() {
        return this.icon.nativeElement as HTMLElement;
    }
 
    private get contentElement() {
        return this.content.nativeElement as HTMLElement;
    }
 
    public ngOnDestroy() {
        this.isAlive = false;
    }
}