native-bar-code-detector.js
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"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.BarcodeDetectorDelegate = void 0;
var core_1 = require("./core");
var BarcodeDetectorDelegate = (function () {
function BarcodeDetectorDelegate(requestedFormats, verbose, logger) {
this.formatMap = new Map([
[core_1.Html5QrcodeSupportedFormats.QR_CODE, "qr_code"],
[core_1.Html5QrcodeSupportedFormats.AZTEC, "aztec"],
[core_1.Html5QrcodeSupportedFormats.CODABAR, "codabar"],
[core_1.Html5QrcodeSupportedFormats.CODE_39, "code_39"],
[core_1.Html5QrcodeSupportedFormats.CODE_93, "code_93"],
[core_1.Html5QrcodeSupportedFormats.CODE_128, "code_128"],
[core_1.Html5QrcodeSupportedFormats.DATA_MATRIX, "data_matrix"],
[core_1.Html5QrcodeSupportedFormats.ITF, "itf"],
[core_1.Html5QrcodeSupportedFormats.EAN_13, "ean_13"],
[core_1.Html5QrcodeSupportedFormats.EAN_8, "ean_8"],
[core_1.Html5QrcodeSupportedFormats.PDF_417, "pdf417"],
[core_1.Html5QrcodeSupportedFormats.UPC_A, "upc_a"],
[core_1.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;
var formats = this.createBarcodeDetectorFormats(requestedFormats);
this.detector = new BarcodeDetector(formats);
if (!this.detector) {
throw "BarcodeDetector detector not supported";
}
}
BarcodeDetectorDelegate.isSupported = function () {
if (!("BarcodeDetector" in window)) {
return false;
}
var dummyDetector = new BarcodeDetector({ formats: ["qr_code"] });
return typeof dummyDetector !== "undefined";
};
BarcodeDetectorDelegate.prototype.decodeAsync = function (canvas) {
return __awaiter(this, void 0, void 0, function () {
var barcodes, largestBarcode;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.detector.detect(canvas)];
case 1:
barcodes = _a.sent();
if (!barcodes || barcodes.length === 0) {
throw "No barcode or QR code detected.";
}
largestBarcode = this.selectLargestBarcode(barcodes);
return [2, {
text: largestBarcode.rawValue,
format: core_1.QrcodeResultFormat.create(this.toHtml5QrcodeSupportedFormats(largestBarcode.format)),
debugData: this.createDebugData()
}];
}
});
});
};
BarcodeDetectorDelegate.prototype.selectLargestBarcode = function (barcodes) {
var largestBarcode = null;
var maxArea = 0;
for (var _i = 0, barcodes_1 = barcodes; _i < barcodes_1.length; _i++) {
var barcode = barcodes_1[_i];
var area = barcode.boundingBox.width * barcode.boundingBox.height;
if (area > maxArea) {
maxArea = area;
largestBarcode = barcode;
}
}
if (!largestBarcode) {
throw "No largest barcode found";
}
return largestBarcode;
};
BarcodeDetectorDelegate.prototype.createBarcodeDetectorFormats = function (requestedFormats) {
var formats = [];
for (var _i = 0, requestedFormats_1 = requestedFormats; _i < requestedFormats_1.length; _i++) {
var requestedFormat = requestedFormats_1[_i];
if (this.formatMap.has(requestedFormat)) {
formats.push(this.formatMap.get(requestedFormat));
}
else {
this.logger.warn("".concat(requestedFormat, " is not supported by")
+ "BarcodeDetectorDelegate");
}
}
return { formats: formats };
};
BarcodeDetectorDelegate.prototype.toHtml5QrcodeSupportedFormats = function (barcodeDetectorFormat) {
if (!this.reverseFormatMap.has(barcodeDetectorFormat)) {
throw "reverseFormatMap doesn't have ".concat(barcodeDetectorFormat);
}
return this.reverseFormatMap.get(barcodeDetectorFormat);
};
BarcodeDetectorDelegate.prototype.createReverseFormatMap = function () {
var result = new Map();
this.formatMap.forEach(function (value, key, _) {
result.set(value, key);
});
return result;
};
BarcodeDetectorDelegate.prototype.createDebugData = function () {
return { decoderName: "BarcodeDetector" };
};
return BarcodeDetectorDelegate;
}());
exports.BarcodeDetectorDelegate = BarcodeDetectorDelegate;
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