@thewirv/react-barcode-scanner
Version:
A React component for scanning QR codes and other barcodes via webcam
202 lines (188 loc) • 9.72 kB
JavaScript
;
var jsxRuntime = require('react/jsx-runtime');
var react = require('react');
var browser = require('@zxing/browser');
var fi = require('react-icons/fi');
var library = require('@zxing/library');
/******************************************************************************
Copyright (c) Microsoft Corporation.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
/* global Reflect, Promise, SuppressedError, Symbol */
var __assign = function() {
__assign = Object.assign || function __assign(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
function __awaiter(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());
});
}
function __generator(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 };
}
}
typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
var e = new Error(message);
return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
};
function decodeBarcodeFromConstraints(codeReader_1, videoElement_1, _a) {
return __awaiter(this, arguments, void 0, function (codeReader, videoElement, _b) {
var result, error_1;
var constraints = _b.constraints, onSuccess = _b.onSuccess, onError = _b.onError;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
if (!videoElement.current)
return [2 /*return*/];
_c.label = 1;
case 1:
_c.trys.push([1, 3, , 4]);
return [4 /*yield*/, codeReader.decodeOnceFromConstraints({ audio: false, video: constraints, preferCurrentTab: true }, videoElement.current)];
case 2:
result = _c.sent();
onSuccess(result.getText());
return [3 /*break*/, 4];
case 3:
error_1 = _c.sent();
if (error_1 &&
onError &&
!(error_1 instanceof library.NotFoundException ||
error_1 instanceof library.ChecksumException ||
error_1 instanceof library.FormatException)) {
onError(error_1);
}
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
});
}
var styles = {
barcodeScannerError: {
border: '8px #eee solid',
borderRadius: '10px',
padding: '2rem',
},
barcodeScannerErrorSvg: {
width: '75%',
height: '75%',
display: 'block',
opacity: 0.2,
margin: '0 auto',
},
container: {
width: '100%',
paddingTop: '100%',
overflow: 'hidden',
position: 'relative',
display: 'none',
},
barcodeScannerVisible: {
display: 'block',
},
video: {
top: 0,
left: 0,
width: '100%',
height: '100%',
display: 'block',
overflow: 'hidden',
position: 'absolute',
transform: undefined,
},
};
var BarcodeScanner = function (_a) {
var _b = _a.doScan, doScan = _b === void 0 ? true : _b, _c = _a.constraints, constraints = _c === void 0 ? { facingMode: 'environment' } : _c, onSuccess = _a.onSuccess, onError = _a.onError, onLoad = _a.onLoad, Viewfinder = _a.Viewfinder, containerStyle = _a.containerStyle, videoContainerStyle = _a.videoContainerStyle, videoStyle = _a.videoStyle, passedVideoProps = _a.videoProps;
var _d = react.useState(false), isCameraInitialized = _d[0], setIsCameraInitialized = _d[1];
var codeReader = react.useMemo(function () { return new browser.BrowserMultiFormatReader(); }, []);
var videoElement = react.useRef(null);
var isShowingDisabledImage = !isCameraInitialized || !doScan;
react.useEffect(function () {
if (!doScan || !onSuccess || !onError) {
return;
}
if (!(navigator === null || navigator === void 0 ? void 0 : navigator.mediaDevices)) {
var message = 'Your browser has no support for the MediaDevices API. You could fix this by running "npm i webrtc-adapter"';
console.warn("[ReactBarcodeScanner]: ".concat(message));
onError(new Error(message));
return;
}
decodeBarcodeFromConstraints(codeReader, videoElement, {
constraints: constraints,
onSuccess: onSuccess,
onError: onError,
});
}, [onSuccess, onError, doScan, codeReader, constraints]);
var videoProps = react.useMemo(function () {
var _a;
function onLoadedData(_a) {
var nativeEvent = _a.nativeEvent;
var eventTarget = nativeEvent.target;
if (!(eventTarget === null || eventTarget === void 0 ? void 0 : eventTarget.readyState))
return;
if (eventTarget.readyState === eventTarget.HAVE_ENOUGH_DATA) {
setIsCameraInitialized(true);
if (onLoad) {
onLoad();
}
}
}
var defaultVideoProps = {
playsInline: true,
disablePictureInPicture: true,
muted: true,
onLoadedData: onLoadedData,
style: __assign(__assign(__assign({}, styles.video), videoStyle), { transform: "".concat((_a = videoStyle === null || videoStyle === void 0 ? void 0 : videoStyle.transform) !== null && _a !== void 0 ? _a : '', " ").concat(constraints.facingMode === 'user' ? 'scaleX(-1)' : '') }),
};
if (!passedVideoProps)
return defaultVideoProps;
if (typeof passedVideoProps !== 'function')
return passedVideoProps;
return passedVideoProps(defaultVideoProps);
}, [passedVideoProps, onLoad]);
return (jsxRuntime.jsxs("section", { style: containerStyle, children: [isShowingDisabledImage && (jsxRuntime.jsx("div", { style: styles.barcodeScannerError, children: jsxRuntime.jsx(fi.FiCameraOff, { size: 300, style: styles.barcodeScannerErrorSvg }) })), jsxRuntime.jsxs("div", { style: __assign(__assign(__assign({}, styles.container), (!isShowingDisabledImage ? styles.barcodeScannerVisible : {})), videoContainerStyle), children: [jsxRuntime.jsx("video", __assign({ ref: videoElement }, videoProps)), !!Viewfinder && jsxRuntime.jsx(Viewfinder, {})] })] }));
};
BarcodeScanner.displayName = 'BarcodeScanner';
exports.BarcodeScanner = BarcodeScanner;