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@jonyadamit/ngx-qrcode-ivy

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An Angular component for generating QRCodes

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import { ChangeDetectionStrategy, Component, Input, ViewChild } from '@angular/core'; import QRCode from 'qrcode'; import { NgxQrcodeElementTypes } from './qrcode.types'; import { DEFAULT_VALUES } from './qrcode.constants'; import * as i0 from "@angular/core"; export class QrcodeComponent { constructor(renderer) { this.renderer = renderer; this.elementType = DEFAULT_VALUES.elementType; this.cssClass = DEFAULT_VALUES.cssClass; this.value = DEFAULT_VALUES.value; this.version = DEFAULT_VALUES.version; this.errorCorrectionLevel = DEFAULT_VALUES.errorCorrectionLevel; this.margin = DEFAULT_VALUES.margin; this.scale = DEFAULT_VALUES.scale; this.width = DEFAULT_VALUES.width; this.colorDark = DEFAULT_VALUES.colorDark; this.colorLight = DEFAULT_VALUES.colorLight; } ngOnChanges() { this.createQRCode(); } createQRCode() { if (!this.value) { return; } let element; switch (this.elementType) { case NgxQrcodeElementTypes.CANVAS: element = this.renderer.createElement('canvas'); this.toCanvas(element).then(() => { this.renderElement(element); }).catch(e => { this.removeElementChildren(); console.error(e); }); break; default: element = this.renderer.createElement('img'); this.toDataURL().then((src) => { element.setAttribute('src', src); if (this.alt) { element.setAttribute('alt', this.alt); } this.renderElement(element); }).catch(e => { this.removeElementChildren(); console.error(e); }); } } toDataURL() { return QRCode.toDataURL(this.value, { version: this.version, errorCorrectionLevel: this.errorCorrectionLevel, margin: this.margin, scale: this.scale, width: this.width, color: { dark: this.colorDark, light: this.colorLight } }); } toCanvas(canvas) { return QRCode.toCanvas(canvas, this.value, { version: this.version, errorCorrectionLevel: this.errorCorrectionLevel, margin: this.margin, scale: this.scale, width: this.width, color: { dark: this.colorDark, light: this.colorLight } }); } renderElement(element) { this.removeElementChildren(); this.renderer.appendChild(this.qrcElement.nativeElement, element); } removeElementChildren() { for (const node of this.qrcElement.nativeElement.childNodes) { this.renderer.removeChild(this.qrcElement.nativeElement, node); } } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: QrcodeComponent, deps: [{ token: i0.Renderer2 }], target: i0.ɵɵFactoryTarget.Component }); } static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.0.1", type: QrcodeComponent, selector: "ngx-qrcode", inputs: { elementType: "elementType", cssClass: "cssClass", alt: "alt", value: "value", version: "version", errorCorrectionLevel: "errorCorrectionLevel", margin: "margin", scale: "scale", width: "width", colorDark: "colorDark", colorLight: "colorLight" }, viewQueries: [{ propertyName: "qrcElement", first: true, predicate: ["qrcElement"], descendants: true }], usesOnChanges: true, ngImport: i0, template: `<div #qrcElement [class]="cssClass"></div>`, isInline: true, changeDetection: i0.ChangeDetectionStrategy.OnPush }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.1", ngImport: i0, type: QrcodeComponent, decorators: [{ type: Component, args: [{ selector: 'ngx-qrcode', template: `<div #qrcElement [class]="cssClass"></div>`, changeDetection: ChangeDetectionStrategy.OnPush }] }], ctorParameters: function () { return [{ type: i0.Renderer2 }]; }, propDecorators: { elementType: [{ type: Input }], cssClass: [{ type: Input }], alt: [{ type: Input }], value: [{ type: Input }], version: [{ type: Input }], errorCorrectionLevel: [{ type: Input }], margin: [{ type: Input }], scale: [{ type: Input }], width: [{ type: Input }], colorDark: [{ type: Input }], colorLight: [{ type: Input }], qrcElement: [{ type: ViewChild, args: ['qrcElement'] }] } }); //# 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{ ChangeDetectionStrategy, Component, ElementRef, Input, OnChanges, Renderer2, ViewChild } from '@angular/core';\r\n\r\nimport QRCode from 'qrcode';\r\n\r\nimport { NgxQrcodeElementTypes } from './qrcode.types';\r\nimport { DEFAULT_VALUES } from './qrcode.constants';\r\n\r\n@Component({\r\n  selector: 'ngx-qrcode',\r\n  template: `<div #qrcElement [class]=\"cssClass\"></div>`,\r\n  changeDetection: ChangeDetectionStrategy.OnPush\r\n})\r\nexport class QrcodeComponent implements OnChanges {\r\n\r\n  @Input() elementType = DEFAULT_VALUES.elementType;\r\n  @Input() cssClass = DEFAULT_VALUES.cssClass;\r\n  @Input() alt: string;\r\n  @Input() value = DEFAULT_VALUES.value;\r\n  @Input() version = DEFAULT_VALUES.version;\r\n  @Input() errorCorrectionLevel = DEFAULT_VALUES.errorCorrectionLevel;\r\n  @Input() margin = DEFAULT_VALUES.margin;\r\n  @Input() scale = DEFAULT_VALUES.scale;\r\n  @Input() width = DEFAULT_VALUES.width;\r\n  @Input() colorDark = DEFAULT_VALUES.colorDark;\r\n  @Input() colorLight = DEFAULT_VALUES.colorLight;\r\n\r\n  @ViewChild('qrcElement') qrcElement: ElementRef;\r\n\r\n  constructor(private renderer: Renderer2) {\r\n  }\r\n\r\n  ngOnChanges() {\r\n    this.createQRCode();\r\n  }\r\n\r\n  createQRCode() {\r\n    if (!this.value) {\r\n      return;\r\n    }\r\n\r\n    let element: Element;\r\n\r\n    switch (this.elementType) {\r\n\r\n      case NgxQrcodeElementTypes.CANVAS:\r\n        element = this.renderer.createElement('canvas');\r\n        this.toCanvas(element).then(() => {\r\n          this.renderElement(element);\r\n        }).catch(e => {\r\n          this.removeElementChildren();\r\n          console.error(e);\r\n        });\r\n        break;\r\n      default:\r\n        element = this.renderer.createElement('img');\r\n        this.toDataURL().then((src: string) => {\r\n          element.setAttribute('src', src);\r\n          if (this.alt) {\r\n            element.setAttribute('alt', this.alt);\r\n          }\r\n          this.renderElement(element);\r\n        }).catch(e => {\r\n          this.removeElementChildren();\r\n          console.error(e);\r\n        });\r\n    }\r\n  }\r\n\r\n  private toDataURL(): Promise<string> {\r\n    return QRCode.toDataURL(this.value,\r\n      {\r\n        version: this.version,\r\n        errorCorrectionLevel: this.errorCorrectionLevel,\r\n        margin: this.margin,\r\n        scale: this.scale,\r\n        width: this.width,\r\n        color: {\r\n          dark: this.colorDark,\r\n          light: this.colorLight\r\n        }\r\n      });\r\n  }\r\n\r\n  private toCanvas(canvas): Promise<any> {\r\n    return QRCode.toCanvas(canvas, this.value, {\r\n      version: this.version,\r\n      errorCorrectionLevel: this.errorCorrectionLevel,\r\n      margin: this.margin,\r\n      scale: this.scale,\r\n      width: this.width,\r\n      color: {\r\n        dark: this.colorDark,\r\n        light: this.colorLight\r\n      }\r\n    });\r\n  }\r\n\r\n  private renderElement(element): void {\r\n    this.removeElementChildren();\r\n    this.renderer.appendChild(this.qrcElement.nativeElement, element);\r\n  }\r\n\r\n  private removeElementChildren(): void {\r\n    for (const node of this.qrcElement.nativeElement.childNodes) {\r\n      this.renderer.removeChild(this.qrcElement.nativeElement, node);\r\n    }\r\n  }\r\n}\r\n"]}