var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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import { QrcodeResultFormat, Html5QrcodeSupportedFormats } from "./core";
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export class BarcodeDetectorDelegate {
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static isSupported() {
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if (!("BarcodeDetector" in window)) {
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return false;
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}
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const dummyDetector = new BarcodeDetector({ formats: ["qr_code"] });
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return typeof dummyDetector !== "undefined";
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}
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constructor(requestedFormats, verbose, logger) {
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this.formatMap = new Map([
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[Html5QrcodeSupportedFormats.QR_CODE, "qr_code"],
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[Html5QrcodeSupportedFormats.AZTEC, "aztec"],
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[Html5QrcodeSupportedFormats.CODABAR, "codabar"],
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[Html5QrcodeSupportedFormats.CODE_39, "code_39"],
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[Html5QrcodeSupportedFormats.CODE_93, "code_93"],
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[Html5QrcodeSupportedFormats.CODE_128, "code_128"],
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[Html5QrcodeSupportedFormats.DATA_MATRIX, "data_matrix"],
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[Html5QrcodeSupportedFormats.ITF, "itf"],
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[Html5QrcodeSupportedFormats.EAN_13, "ean_13"],
|
[Html5QrcodeSupportedFormats.EAN_8, "ean_8"],
|
[Html5QrcodeSupportedFormats.PDF_417, "pdf417"],
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[Html5QrcodeSupportedFormats.UPC_A, "upc_a"],
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[Html5QrcodeSupportedFormats.UPC_E, "upc_e"]
|
]);
|
this.reverseFormatMap = this.createReverseFormatMap();
|
if (!BarcodeDetectorDelegate.isSupported()) {
|
throw "Use html5qrcode.min.js without edit, Use "
|
+ "BarcodeDetectorDelegate only if it isSupported();";
|
}
|
this.verbose = verbose;
|
this.logger = logger;
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const formats = this.createBarcodeDetectorFormats(requestedFormats);
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this.detector = new BarcodeDetector(formats);
|
if (!this.detector) {
|
throw "BarcodeDetector detector not supported";
|
}
|
}
|
decodeAsync(canvas) {
|
return __awaiter(this, void 0, void 0, function* () {
|
const barcodes = yield this.detector.detect(canvas);
|
if (!barcodes || barcodes.length === 0) {
|
throw "No barcode or QR code detected.";
|
}
|
let largestBarcode = this.selectLargestBarcode(barcodes);
|
return {
|
text: largestBarcode.rawValue,
|
format: QrcodeResultFormat.create(this.toHtml5QrcodeSupportedFormats(largestBarcode.format)),
|
debugData: this.createDebugData()
|
};
|
});
|
}
|
selectLargestBarcode(barcodes) {
|
let largestBarcode = null;
|
let maxArea = 0;
|
for (let barcode of barcodes) {
|
let area = barcode.boundingBox.width * barcode.boundingBox.height;
|
if (area > maxArea) {
|
maxArea = area;
|
largestBarcode = barcode;
|
}
|
}
|
if (!largestBarcode) {
|
throw "No largest barcode found";
|
}
|
return largestBarcode;
|
}
|
createBarcodeDetectorFormats(requestedFormats) {
|
let formats = [];
|
for (const requestedFormat of requestedFormats) {
|
if (this.formatMap.has(requestedFormat)) {
|
formats.push(this.formatMap.get(requestedFormat));
|
}
|
else {
|
this.logger.warn(`${requestedFormat} is not supported by`
|
+ "BarcodeDetectorDelegate");
|
}
|
}
|
return { formats: formats };
|
}
|
toHtml5QrcodeSupportedFormats(barcodeDetectorFormat) {
|
if (!this.reverseFormatMap.has(barcodeDetectorFormat)) {
|
throw `reverseFormatMap doesn't have ${barcodeDetectorFormat}`;
|
}
|
return this.reverseFormatMap.get(barcodeDetectorFormat);
|
}
|
createReverseFormatMap() {
|
let result = new Map();
|
this.formatMap.forEach((value, key, _) => {
|
result.set(value, key);
|
});
|
return result;
|
}
|
createDebugData() {
|
return { decoderName: "BarcodeDetector" };
|
}
|
}
|
//# sourceMappingURL=native-bar-code-detector.js.map
|
