102 lines
4.1 KiB
JavaScript
102 lines
4.1 KiB
JavaScript
import * as ZXing from "../third_party/zxing-js.umd";
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import { QrcodeResultFormat, Html5QrcodeSupportedFormats } from "./core";
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export class ZXingHtml5QrcodeDecoder {
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constructor(requestedFormats, verbose, logger) {
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this.formatMap = new Map([
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[Html5QrcodeSupportedFormats.QR_CODE, ZXing.BarcodeFormat.QR_CODE],
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[Html5QrcodeSupportedFormats.AZTEC, ZXing.BarcodeFormat.AZTEC],
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[Html5QrcodeSupportedFormats.CODABAR, ZXing.BarcodeFormat.CODABAR],
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[Html5QrcodeSupportedFormats.CODE_39, ZXing.BarcodeFormat.CODE_39],
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[Html5QrcodeSupportedFormats.CODE_93, ZXing.BarcodeFormat.CODE_93],
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[
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Html5QrcodeSupportedFormats.CODE_128,
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ZXing.BarcodeFormat.CODE_128
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],
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[
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Html5QrcodeSupportedFormats.DATA_MATRIX,
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ZXing.BarcodeFormat.DATA_MATRIX
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],
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[
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Html5QrcodeSupportedFormats.MAXICODE,
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ZXing.BarcodeFormat.MAXICODE
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],
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[Html5QrcodeSupportedFormats.ITF, ZXing.BarcodeFormat.ITF],
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[Html5QrcodeSupportedFormats.EAN_13, ZXing.BarcodeFormat.EAN_13],
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[Html5QrcodeSupportedFormats.EAN_8, ZXing.BarcodeFormat.EAN_8],
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[Html5QrcodeSupportedFormats.PDF_417, ZXing.BarcodeFormat.PDF_417],
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[Html5QrcodeSupportedFormats.RSS_14, ZXing.BarcodeFormat.RSS_14],
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[
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Html5QrcodeSupportedFormats.RSS_EXPANDED,
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ZXing.BarcodeFormat.RSS_EXPANDED
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],
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[Html5QrcodeSupportedFormats.UPC_A, ZXing.BarcodeFormat.UPC_A],
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[Html5QrcodeSupportedFormats.UPC_E, ZXing.BarcodeFormat.UPC_E],
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[
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Html5QrcodeSupportedFormats.UPC_EAN_EXTENSION,
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ZXing.BarcodeFormat.UPC_EAN_EXTENSION
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]
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]);
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this.reverseFormatMap = this.createReverseFormatMap();
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if (!ZXing) {
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throw "Use html5qrcode.min.js without edit, ZXing not found.";
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}
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this.verbose = verbose;
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this.logger = logger;
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const formats = this.createZXingFormats(requestedFormats);
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const hints = new Map();
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hints.set(ZXing.DecodeHintType.POSSIBLE_FORMATS, formats);
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hints.set(ZXing.DecodeHintType.TRY_HARDER, false);
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this.hints = hints;
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}
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decodeAsync(canvas) {
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return new Promise((resolve, reject) => {
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try {
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resolve(this.decode(canvas));
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}
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catch (error) {
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reject(error);
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}
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});
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}
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decode(canvas) {
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const zxingDecoder = new ZXing.MultiFormatReader(this.verbose, this.hints);
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const luminanceSource = new ZXing.HTMLCanvasElementLuminanceSource(canvas);
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const binaryBitmap = new ZXing.BinaryBitmap(new ZXing.HybridBinarizer(luminanceSource));
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let result = zxingDecoder.decode(binaryBitmap);
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return {
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text: result.text,
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format: QrcodeResultFormat.create(this.toHtml5QrcodeSupportedFormats(result.format)),
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debugData: this.createDebugData()
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};
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}
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createReverseFormatMap() {
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let result = new Map();
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this.formatMap.forEach((value, key, _) => {
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result.set(value, key);
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});
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return result;
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}
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toHtml5QrcodeSupportedFormats(zxingFormat) {
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if (!this.reverseFormatMap.has(zxingFormat)) {
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throw `reverseFormatMap doesn't have ${zxingFormat}`;
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}
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return this.reverseFormatMap.get(zxingFormat);
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}
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createZXingFormats(requestedFormats) {
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let zxingFormats = [];
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for (const requestedFormat of requestedFormats) {
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if (this.formatMap.has(requestedFormat)) {
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zxingFormats.push(this.formatMap.get(requestedFormat));
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}
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else {
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this.logger.logError(`${requestedFormat} is not supported by`
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+ "ZXingHtml5QrcodeShim");
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}
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}
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return zxingFormats;
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}
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createDebugData() {
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return { decoderName: "zxing-js" };
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}
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}
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//# sourceMappingURL=zxing-html5-qrcode-decoder.js.map
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