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1 | import { debounceTime, distinctUntilChanged } from 'rxjs/operators' | |
2 | import { Component, forwardRef, Input, OnInit } from '@angular/core' | |
3 | import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms' | |
4 | import { Subject } from 'rxjs' | |
5 | import truncate from 'lodash-es/truncate' | |
6 | import { ScreenService } from '@app/shared/misc/screen.service' | |
7 | import { MarkdownService } from '@app/shared/renderer' | |
8 | ||
9 | @Component({ | |
10 | selector: 'my-markdown-textarea', | |
11 | templateUrl: './markdown-textarea.component.html', | |
12 | styleUrls: [ './markdown-textarea.component.scss' ], | |
13 | providers: [ | |
14 | { | |
15 | provide: NG_VALUE_ACCESSOR, | |
16 | useExisting: forwardRef(() => MarkdownTextareaComponent), | |
17 | multi: true | |
18 | } | |
19 | ] | |
20 | }) | |
21 | ||
22 | export class MarkdownTextareaComponent implements ControlValueAccessor, OnInit { | |
23 | @Input() content = '' | |
24 | @Input() classes: string[] = [] | |
25 | @Input() textareaWidth = '100%' | |
26 | @Input() textareaHeight = '150px' | |
27 | @Input() previewColumn = false | |
28 | @Input() truncate: number | |
29 | @Input() markdownType: 'text' | 'enhanced' = 'text' | |
30 | @Input() markdownVideo = false | |
31 | ||
32 | textareaMarginRight = '0' | |
33 | flexDirection = 'column' | |
34 | truncatedPreviewHTML = '' | |
35 | previewHTML = '' | |
36 | ||
37 | private contentChanged = new Subject<string>() | |
38 | ||
39 | constructor ( | |
40 | private screenService: ScreenService, | |
41 | private markdownService: MarkdownService | |
42 | ) {} | |
43 | ||
44 | ngOnInit () { | |
45 | this.contentChanged | |
46 | .pipe( | |
47 | debounceTime(150), | |
48 | distinctUntilChanged() | |
49 | ) | |
50 | .subscribe(() => this.updatePreviews()) | |
51 | ||
52 | this.contentChanged.next(this.content) | |
53 | ||
54 | if (this.previewColumn) { | |
55 | this.flexDirection = 'row' | |
56 | this.textareaMarginRight = '15px' | |
57 | } | |
58 | } | |
59 | ||
60 | propagateChange = (_: any) => { /* empty */ } | |
61 | ||
62 | writeValue (description: string) { | |
63 | this.content = description | |
64 | ||
65 | this.contentChanged.next(this.content) | |
66 | } | |
67 | ||
68 | registerOnChange (fn: (_: any) => void) { | |
69 | this.propagateChange = fn | |
70 | } | |
71 | ||
72 | registerOnTouched () { | |
73 | // Unused | |
74 | } | |
75 | ||
76 | onModelChange () { | |
77 | this.propagateChange(this.content) | |
78 | ||
79 | this.contentChanged.next(this.content) | |
80 | } | |
81 | ||
82 | arePreviewsDisplayed () { | |
83 | return this.screenService.isInSmallView() === false | |
84 | } | |
85 | ||
86 | private async updatePreviews () { | |
87 | if (this.content === null || this.content === undefined) return | |
88 | ||
89 | this.truncatedPreviewHTML = await this.markdownRender(truncate(this.content, { length: this.truncate })) | |
90 | this.previewHTML = await this.markdownRender(this.content) | |
91 | } | |
92 | ||
93 | private async markdownRender (text: string) { | |
94 | const html = this.markdownType === 'text' ? | |
95 | await this.markdownService.textMarkdownToHTML(text) : | |
96 | await this.markdownService.enhancedMarkdownToHTML(text) | |
97 | ||
98 | return this.markdownVideo ? this.markdownService.processVideoTimestamps(html) : html | |
99 | } | |
100 | } |