大幅変更＆環境バージョンアップ
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304
plugin/qr_code_scanner/ios/Classes/QRView.swift
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304
plugin/qr_code_scanner/ios/Classes/QRView.swift
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//
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// QRView.swift
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// flutter_qr
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//
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// Created by Julius Canute on 21/12/18.
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//
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import Foundation
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import MTBBarcodeScanner
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public class QRView:NSObject,FlutterPlatformView {
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@IBOutlet var previewView: UIView!
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var scanner: MTBBarcodeScanner?
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var registrar: FlutterPluginRegistrar
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var channel: FlutterMethodChannel
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var cameraFacing: MTBCamera
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// Codabar, maxicode, rss14 & rssexpanded not supported. Replaced with qr.
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// UPCa uses ean13 object.
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var QRCodeTypes = [
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0: AVMetadataObject.ObjectType.aztec,
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1: AVMetadataObject.ObjectType.qr,
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2: AVMetadataObject.ObjectType.code39,
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3: AVMetadataObject.ObjectType.code93,
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4: AVMetadataObject.ObjectType.code128,
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5: AVMetadataObject.ObjectType.dataMatrix,
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6: AVMetadataObject.ObjectType.ean8,
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7: AVMetadataObject.ObjectType.ean13,
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8: AVMetadataObject.ObjectType.interleaved2of5,
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9: AVMetadataObject.ObjectType.qr,
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10: AVMetadataObject.ObjectType.pdf417,
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11: AVMetadataObject.ObjectType.qr,
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12: AVMetadataObject.ObjectType.qr,
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13: AVMetadataObject.ObjectType.qr,
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14: AVMetadataObject.ObjectType.ean13,
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15: AVMetadataObject.ObjectType.upce
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]
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public init(withFrame frame: CGRect, withRegistrar registrar: FlutterPluginRegistrar, withId id: Int64, params: Dictionary<String, Any>){
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self.registrar = registrar
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previewView = UIView(frame: frame)
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cameraFacing = MTBCamera.init(rawValue: UInt(Int(params["cameraFacing"] as! Double))) ?? MTBCamera.back
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channel = FlutterMethodChannel(name: "net.touchcapture.qr.flutterqr/qrview_\(id)", binaryMessenger: registrar.messenger())
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}
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deinit {
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scanner?.stopScanning()
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}
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public func view() -> UIView {
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channel.setMethodCallHandler({
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[weak self] (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
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switch(call.method){
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case "setDimensions":
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let arguments = call.arguments as! Dictionary<String, Double>
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self?.setDimensions(result,
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width: arguments["width"] ?? 0,
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height: arguments["height"] ?? 0,
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scanAreaWidth: arguments["scanAreaWidth"] ?? 0,
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scanAreaHeight: arguments["scanAreaHeight"] ?? 0,
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scanAreaOffset: arguments["scanAreaOffset"] ?? 0)
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case "startScan":
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self?.startScan(call.arguments as! Array<Int>, result)
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case "flipCamera":
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self?.flipCamera(result)
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case "toggleFlash":
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self?.toggleFlash(result)
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case "pauseCamera":
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self?.pauseCamera(result)
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case "stopCamera":
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self?.stopCamera(result)
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case "resumeCamera":
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self?.resumeCamera(result)
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case "getCameraInfo":
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self?.getCameraInfo(result)
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case "getFlashInfo":
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self?.getFlashInfo(result)
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case "getSystemFeatures":
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self?.getSystemFeatures(result)
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default:
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result(FlutterMethodNotImplemented)
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return
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}
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})
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return previewView
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}
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func setDimensions(_ result: @escaping FlutterResult, width: Double, height: Double, scanAreaWidth: Double, scanAreaHeight: Double, scanAreaOffset: Double) {
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// Then set the size of the preview area.
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previewView.frame = CGRect(x: 0, y: 0, width: width, height: height)
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// Then set the size of the scan area.
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let midX = self.view().bounds.midX
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let midY = self.view().bounds.midY
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if let sc: MTBBarcodeScanner = scanner {
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// Set the size of the preview if preview is already created.
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if let previewLayer = sc.previewLayer {
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previewLayer.frame = self.previewView.bounds
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}
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} else {
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// Create new preview.
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scanner = MTBBarcodeScanner(previewView: previewView)
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}
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// Set scanArea if provided.
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if (scanAreaWidth != 0 && scanAreaHeight != 0) {
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scanner?.didStartScanningBlock = {
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self.scanner?.scanRect = CGRect(x: Double(midX) - (scanAreaWidth / 2), y: Double(midY) - (scanAreaHeight / 2), width: scanAreaWidth, height: scanAreaHeight)
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// Set offset if provided.
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if (scanAreaOffset != 0) {
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let reversedOffset = -scanAreaOffset
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self.scanner?.scanRect = (self.scanner?.scanRect.offsetBy(dx: 0, dy: CGFloat(reversedOffset)))!
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}
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}
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}
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return result(width)
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}
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func startScan(_ arguments: Array<Int>, _ result: @escaping FlutterResult) {
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// Check for allowed barcodes
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var allowedBarcodeTypes: Array<AVMetadataObject.ObjectType> = []
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arguments.forEach { arg in
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allowedBarcodeTypes.append( QRCodeTypes[arg]!)
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}
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MTBBarcodeScanner.requestCameraPermission(success: { [weak self] permissionGranted in
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guard let self = self else { return }
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self.channel.invokeMethod("onPermissionSet", arguments: permissionGranted)
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if permissionGranted {
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do {
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try self.scanner?.startScanning(with: self.cameraFacing, resultBlock: { [weak self] codes in
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if let codes = codes {
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for code in codes {
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var typeString: String;
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switch(code.type) {
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case AVMetadataObject.ObjectType.aztec:
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typeString = "AZTEC"
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case AVMetadataObject.ObjectType.code39:
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typeString = "CODE_39"
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case AVMetadataObject.ObjectType.code93:
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typeString = "CODE_93"
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case AVMetadataObject.ObjectType.code128:
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typeString = "CODE_128"
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case AVMetadataObject.ObjectType.dataMatrix:
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typeString = "DATA_MATRIX"
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case AVMetadataObject.ObjectType.ean8:
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typeString = "EAN_8"
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case AVMetadataObject.ObjectType.ean13:
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typeString = "EAN_13"
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case AVMetadataObject.ObjectType.itf14,
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AVMetadataObject.ObjectType.interleaved2of5:
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typeString = "ITF"
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case AVMetadataObject.ObjectType.pdf417:
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typeString = "PDF_417"
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case AVMetadataObject.ObjectType.qr:
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typeString = "QR_CODE"
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case AVMetadataObject.ObjectType.upce:
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typeString = "UPC_E"
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default:
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return
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}
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let bytes = { () -> Data? in
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if #available(iOS 11.0, *) {
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switch (code.descriptor) {
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case let qrDescriptor as CIQRCodeDescriptor:
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return qrDescriptor.errorCorrectedPayload
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case let aztecDescriptor as CIAztecCodeDescriptor:
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return aztecDescriptor.errorCorrectedPayload
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case let pdf417Descriptor as CIPDF417CodeDescriptor:
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return pdf417Descriptor.errorCorrectedPayload
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case let dataMatrixDescriptor as CIDataMatrixCodeDescriptor:
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return dataMatrixDescriptor.errorCorrectedPayload
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default:
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return nil
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}
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} else {
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return nil
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}
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}()
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let result = { () -> [String : Any]? in
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guard let stringValue = code.stringValue else {
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guard let safeBytes = bytes else {
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return nil
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}
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return ["type": typeString, "rawBytes": safeBytes]
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}
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guard let safeBytes = bytes else {
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return ["code": stringValue, "type": typeString]
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}
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return ["code": stringValue, "type": typeString, "rawBytes": safeBytes]
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}()
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guard result != nil else { continue }
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if allowedBarcodeTypes.count == 0 || allowedBarcodeTypes.contains(code.type) {
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self?.channel.invokeMethod("onRecognizeQR", arguments: result)
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}
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}
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}
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})
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} catch {
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let scanError = FlutterError(code: "unknown-error", message: "Unable to start scanning", details: error)
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result(scanError)
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}
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}
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})
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}
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func stopCamera(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = self.scanner {
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if sc.isScanning() {
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sc.stopScanning()
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}
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}
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}
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func getCameraInfo(_ result: @escaping FlutterResult) {
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result(self.cameraFacing.rawValue)
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}
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func flipCamera(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = self.scanner {
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if sc.hasOppositeCamera() {
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sc.flipCamera()
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self.cameraFacing = sc.camera
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}
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return result(sc.camera.rawValue)
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}
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return result(FlutterError(code: "404", message: "No barcode scanner found", details: nil))
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}
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func getFlashInfo(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = self.scanner {
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result(sc.torchMode.rawValue != 0)
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} else {
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let error = FlutterError(code: "cameraInformationError", message: "Could not get flash information", details: nil)
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result(error)
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}
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}
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func toggleFlash(_ result: @escaping FlutterResult){
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if let sc: MTBBarcodeScanner = self.scanner {
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if sc.hasTorch() {
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sc.toggleTorch()
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return result(sc.torchMode == MTBTorchMode(rawValue: 1))
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}
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return result(FlutterError(code: "404", message: "This device doesn\'t support flash", details: nil))
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}
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return result(FlutterError(code: "404", message: "No barcode scanner found", details: nil))
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}
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func pauseCamera(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = self.scanner {
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if sc.isScanning() {
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sc.freezeCapture()
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}
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return result(true)
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}
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return result(FlutterError(code: "404", message: "No barcode scanner found", details: nil))
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}
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func resumeCamera(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = self.scanner {
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if !sc.isScanning() {
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sc.unfreezeCapture()
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}
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return result(true)
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}
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return result(FlutterError(code: "404", message: "No barcode scanner found", details: nil))
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}
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func getSystemFeatures(_ result: @escaping FlutterResult) {
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if let sc: MTBBarcodeScanner = scanner {
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var hasBackCameraVar = false
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var hasFrontCameraVar = false
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let camera = sc.camera
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if(camera == MTBCamera(rawValue: 0)){
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hasBackCameraVar = true
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if sc.hasOppositeCamera() {
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hasFrontCameraVar = true
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}
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}else{
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hasFrontCameraVar = true
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if sc.hasOppositeCamera() {
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hasBackCameraVar = true
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}
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}
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return result([
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"hasFrontCamera": hasFrontCameraVar,
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"hasBackCamera": hasBackCameraVar,
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"hasFlash": sc.hasTorch(),
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"activeCamera": camera.rawValue
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])
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}
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return result(FlutterError(code: "404", message: nil, details: nil))
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}
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}
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