ngx-qrcode2
Version:
An Angular component for generating QRCodes
148 lines • 14.1 kB
JavaScript
import { __decorate, __values } from "tslib";
import { ChangeDetectionStrategy, Component, ElementRef, Input, OnChanges, Renderer2, ViewChild } from '@angular/core';
import QRCode from 'qrcode';
import { NgxQrcodeElementTypes } from './qrcode.types';
import { DEFAULT_VALUES } from './qrcode.constants';
var QrcodeComponent = /** @class */ (function () {
function QrcodeComponent(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;
}
QrcodeComponent.prototype.ngOnChanges = function () {
this.createQRCode();
};
QrcodeComponent.prototype.createQRCode = function () {
var _this = this;
if (!this.value) {
return;
}
var element;
switch (this.elementType) {
case NgxQrcodeElementTypes.CANVAS:
element = this.renderer.createElement('canvas');
this.toCanvas(element).then(function () {
_this.renderElement(element);
}).catch(function (e) {
_this.removeElementChildren();
console.error(e);
});
break;
default:
element = this.renderer.createElement('img');
this.toDataURL().then(function (src) {
element.setAttribute('src', src);
if (_this.alt) {
element.setAttribute('alt', _this.alt);
}
_this.renderElement(element);
}).catch(function (e) {
_this.removeElementChildren();
console.error(e);
});
}
};
QrcodeComponent.prototype.toDataURL = function () {
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
}
});
};
QrcodeComponent.prototype.toCanvas = function (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
}
});
};
QrcodeComponent.prototype.renderElement = function (element) {
this.removeElementChildren();
this.renderer.appendChild(this.qrcElement.nativeElement, element);
};
QrcodeComponent.prototype.removeElementChildren = function () {
var e_1, _a;
try {
for (var _b = __values(this.qrcElement.nativeElement.childNodes), _c = _b.next(); !_c.done; _c = _b.next()) {
var node = _c.value;
this.renderer.removeChild(this.qrcElement.nativeElement, node);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
};
QrcodeComponent.ctorParameters = function () { return [
{ type: Renderer2 }
]; };
__decorate([
Input()
], QrcodeComponent.prototype, "elementType", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "cssClass", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "alt", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "value", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "version", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "errorCorrectionLevel", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "margin", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "scale", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "width", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "colorDark", void 0);
__decorate([
Input()
], QrcodeComponent.prototype, "colorLight", void 0);
__decorate([
ViewChild('qrcElement')
], QrcodeComponent.prototype, "qrcElement", void 0);
QrcodeComponent = __decorate([
Component({
selector: 'ngx-qrcode',
template: "\n <div #qrcElement [class]=\"cssClass\"></div>",
changeDetection: ChangeDetectionStrategy.OnPush
})
], QrcodeComponent);
return QrcodeComponent;
}());
export { QrcodeComponent };
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{ ChangeDetectionStrategy, Component, ElementRef, Input, OnChanges, Renderer2, ViewChild } from '@angular/core';\n\nimport QRCode from 'qrcode';\n\nimport { NgxQrcodeElementTypes } from './qrcode.types';\nimport { DEFAULT_VALUES } from './qrcode.constants';\n\n@Component({\n  selector: 'ngx-qrcode',\n  template: `\n    <div #qrcElement [class]=\"cssClass\"></div>`,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class QrcodeComponent implements OnChanges {\n\n  @Input() elementType = DEFAULT_VALUES.elementType;\n  @Input() cssClass = DEFAULT_VALUES.cssClass;\n  @Input() alt: string;\n  @Input() value = DEFAULT_VALUES.value;\n  @Input() version = DEFAULT_VALUES.version;\n\n  @Input() errorCorrectionLevel = DEFAULT_VALUES.errorCorrectionLevel;\n  @Input() margin = DEFAULT_VALUES.margin;\n  @Input() scale = DEFAULT_VALUES.scale;\n  @Input() width = DEFAULT_VALUES.width;\n  @Input() colorDark = DEFAULT_VALUES.colorDark;\n  @Input() colorLight = DEFAULT_VALUES.colorLight;\n\n  @ViewChild('qrcElement') qrcElement: ElementRef;\n\n  constructor(private renderer: Renderer2) {\n  }\n\n  ngOnChanges() {\n    this.createQRCode();\n  }\n\n  createQRCode() {\n    if (!this.value) {\n      return;\n    }\n\n    let element: Element;\n\n    switch (this.elementType) {\n\n      case NgxQrcodeElementTypes.CANVAS:\n        element = this.renderer.createElement('canvas');\n        this.toCanvas(element).then(() => {\n          this.renderElement(element);\n        }).catch(e => {\n          this.removeElementChildren();\n          console.error(e);\n        });\n        break;\n      default:\n        element = this.renderer.createElement('img');\n        this.toDataURL().then((src: string) => {\n          element.setAttribute('src', src);\n          if (this.alt) {\n            element.setAttribute('alt', this.alt);\n          }\n          this.renderElement(element);\n        }).catch(e => {\n          this.removeElementChildren();\n          console.error(e);\n        });\n    }\n  }\n\n  private toDataURL(): Promise<string> {\n    return QRCode.toDataURL(this.value,\n      {\n        version: this.version,\n        errorCorrectionLevel: this.errorCorrectionLevel,\n        margin: this.margin,\n        scale: this.scale,\n        width: this.width,\n        color: {\n          dark: this.colorDark,\n          light: this.colorLight\n        }\n      });\n  }\n\n  private toCanvas(canvas): Promise<any> {\n    return QRCode.toCanvas(canvas, this.value, {\n      version: this.version,\n      errorCorrectionLevel: this.errorCorrectionLevel,\n      margin: this.margin,\n      scale: this.scale,\n      width: this.width,\n      color: {\n        dark: this.colorDark,\n        light: this.colorLight\n      }\n    });\n  }\n\n  private renderElement(element): void {\n    this.removeElementChildren();\n    this.renderer.appendChild(this.qrcElement.nativeElement, element);\n  }\n\n  private removeElementChildren(): void {\n    for (const node of this.qrcElement.nativeElement.childNodes) {\n      this.renderer.removeChild(this.qrcElement.nativeElement, node);\n    }\n  }\n}\n"]}