client/src/app/shared/forms/markdown-textarea.component.ts

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