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data: string }> {\n if (!ExpoBarCodeScannerModule.scanFromURLAsync) {\n throw new UnavailabilityError('expo-barcode-scanner', 'scanFromURLAsync');\n }\n if (Array.isArray(barCodeTypes) && !barCodeTypes.length) {\n throw new Error('No barCodeTypes specified; provide at least one barCodeType for scanner');\n }\n\n if (Platform.OS === 'ios') {\n if (Array.isArray(barCodeTypes) && !barCodeTypes.includes(BarCodeType.qr)) {\n // Only QR type is supported on iOS, fail if one tries to use other types\n throw new Error('Only QR type is supported by scanFromURLAsync() on iOS');\n }\n // on iOS use only supported QR type\n return await ExpoBarCodeScannerModule.scanFromURLAsync(url, [BarCodeType.qr]);\n }\n\n // On other platforms, if barCodeTypes is not provided, use all available types\n return await ExpoBarCodeScannerModule.scanFromURLAsync(url, barCodeTypes);\n }\n\n render() {\n const nativeProps = this.convertNativeProps(this.props);\n const { onBarCodeScanned } = this.props;\n return (\n <ExpoBarCodeScannerView\n {...nativeProps}\n onBarCodeScanned={this.onObjectDetected(onBarCodeScanned)}\n />\n );\n }\n\n // coordinates of cornerPoints and boundingBox are represented in DP (Display-Indepent Points) unit\n // React Native is using the same unit\n onObjectDetected = (callback?: BarCodeScannedCallback) => ({\n nativeEvent,\n }: BarCodeEventCallbackArguments) => {\n const { type } = nativeEvent;\n if (\n this.lastEvents[type] &&\n this.lastEventsTimes[type] &&\n JSON.stringify(nativeEvent) === this.lastEvents[type] &&\n Date.now() - this.lastEventsTimes[type] < EVENT_THROTTLE_MS\n ) {\n return;\n }\n\n if (callback) {\n callback(nativeEvent);\n this.lastEventsTimes[type] = new Date();\n this.lastEvents[type] = JSON.stringify(nativeEvent);\n }\n };\n\n convertNativeProps(props: BarCodeScannerProps) {\n const newProps = mapValues(props, this.convertProp);\n return newProps;\n }\n\n convertProp(value: any, key: string): any {\n if (typeof value === 'string' && BarCodeScanner.ConversionTables[key]) {\n return BarCodeScanner.ConversionTables[key][value];\n }\n return value;\n }\n}\n\nexport const { Constants } = BarCodeScanner;\n"]} |