Merge pull request #42 from juliansteenbakker/barcode-formats-allowed

Barcode formats allowed

@@ -3,6 +3,9 @@ You can provide a path to controller.analyzeImage(path) in order to scan a local
 Check out the example app to see how you can use the image_picker plugin to retrieve a photo from
 the gallery. Please keep in mind that this feature is only supported on Android and iOS.
 
+Another feature that has been added is a format selector!
+Just keep in mind that iOS for now only supports 1 selected barcode.
+
 ## 0.1.3
 * Fixed crash after asking permission. [#29](https://github.com/juliansteenbakker/mobile_scanner/issues/29)
 * Upgraded cameraX from 1.1.0-beta01 to 1.1.0-beta02

 package dev.steenbakker.mobile_scanner
 
 import com.google.mlkit.vision.barcode.BarcodeScannerOptions
-import java.util.ArrayList
 
 enum class BarcodeFormats(val intValue: Int) {
+    UNKNOWN(com.google.mlkit.vision.barcode.common.Barcode.FORMAT_UNKNOWN),
     ALL_FORMATS(com.google.mlkit.vision.barcode.common.Barcode.FORMAT_ALL_FORMATS), CODE_128(com.google.mlkit.vision.barcode.common.Barcode.FORMAT_CODE_128), CODE_39(
         com.google.mlkit.vision.barcode.common.Barcode.FORMAT_CODE_39
     ),
@@ -17,76 +17,4 @@ enum class BarcodeFormats(val intValue: Int) {
         com.google.mlkit.vision.barcode.common.Barcode.FORMAT_UPC_E
     ),
     PDF417(com.google.mlkit.vision.barcode.common.Barcode.FORMAT_PDF417), AZTEC(com.google.mlkit.vision.barcode.common.Barcode.FORMAT_AZTEC);
-
-    companion object {
-        private var formatsMap: MutableMap<String, Int>? = null
-
-        /**
-         * Return the integer value resuling from OR-ing all of the values
-         * of the supplied strings.
-         *
-         *
-         * Note that if ALL_FORMATS is defined as well as other values, ALL_FORMATS
-         * will be ignored (following how it would work with just OR-ing the ints).
-         *
-         * @param strings - list of strings representing the various formats
-         * @return integer value corresponding to OR of all the values.
-         */
-        fun intFromStringList(strings: List<String>?): Int {
-            if (strings == null) return ALL_FORMATS.intValue
-            var `val` = 0
-            for (string in strings) {
-                val asInt = formatsMap!![string]
-                if (asInt != null) {
-                    `val` = `val` or asInt
-                }
-            }
-            return `val`
-        }
-
-        fun optionsFromStringList(strings: List<String>?): BarcodeScannerOptions {
-            if (strings == null) {
-                return BarcodeScannerOptions.Builder().setBarcodeFormats(ALL_FORMATS.intValue)
-                    .build()
-            }
-            val ints: MutableList<Int> = ArrayList(strings.size)
-            run {
-                var i = 0
-                val l = strings.size
-                while (i < l) {
-                    val integer =
-                        formatsMap!![strings[i]]
-                    if (integer != null) {
-                        ints.add(integer)
-                    }
-                    ++i
-                }
-            }
-            if (ints.size == 0) {
-                return BarcodeScannerOptions.Builder().setBarcodeFormats(ALL_FORMATS.intValue)
-                    .build()
-            }
-            if (ints.size == 1) {
-                return BarcodeScannerOptions.Builder().setBarcodeFormats(ints[0]).build()
-            }
-            val first = ints[0]
-            val rest = IntArray(ints.size - 1)
-            var i = 0
-            for (e in ints.subList(1, ints.size)) {
-                rest[i++] = e
-            }
-            return BarcodeScannerOptions.Builder()
-                .setBarcodeFormats(first, *rest).build()
-        }
-
-        init {
-            val values = values()
-            formatsMap =
-                HashMap<String, Int>(values.size * 4 / 3)
-            for (value in values) {
-                formatsMap!![value.name] =
-                    value.intValue
-            }
-        }
-    }
 }
\ No newline at end of file

@@ -128,11 +128,18 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
         val facing: Int = call.argument<Int>("facing") ?: 0
         val ratio: Int? = call.argument<Int>("ratio")
         val torch: Boolean = call.argument<Boolean>("torch") ?: false
-        val formatStrings: List<String>? = call.argument<List<String>>("formats")
+        val formats: List<Int>? = call.argument<List<Int>>("formats")
 
-        if (formatStrings != null) {
-            val options: BarcodeScannerOptions = BarcodeFormats.optionsFromStringList(formatStrings)
-            scanner = BarcodeScanning.getClient(options)
+        if (formats != null) {
+            val formatsList: MutableList<Int> = mutableListOf()
+            for (index in formats) {
+                formatsList.add(BarcodeFormats.values()[index].intValue)
+            }
+            scanner = if (formatsList.size == 1) {
+                BarcodeScanning.getClient( BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first()).build());
+            } else {
+                BarcodeScanning.getClient( BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first(), *formatsList.subList(1, formatsList.size).toIntArray() ).build());
+            }
         }
 
         val future = ProcessCameraProvider.getInstance(activity)

@@ -17,6 +17,7 @@ class _BarcodeScannerWithControllerState
 
   MobileScannerController controller = MobileScannerController(
     torchEnabled: true,
+    // formats: [BarcodeFormat.qrCode]
     // facing: CameraFacing.front,
   );
 

@@ -26,7 +26,7 @@ public class SwiftMobileScannerPlugin: NSObject, FlutterPlugin, FlutterStreamHan
     var analyzing: Bool = false
     var position = AVCaptureDevice.Position.back
     
-    let scanner = BarcodeScanner.barcodeScanner()
+    var scanner = BarcodeScanner.barcodeScanner()
     
     public static func register(with registrar: FlutterPluginRegistrar) {
         let instance = SwiftMobileScannerPlugin(registrar.textures())
@@ -171,6 +171,15 @@ public class SwiftMobileScannerPlugin: NSObject, FlutterPlugin, FlutterStreamHan
 //        let ratio: Int = argReader.int(key: "ratio")
         let torch: Bool = argReader.bool(key: "torch") ?? false
         let facing: Int = argReader.int(key: "facing") ?? 1
+        let formats: Array = argReader.intArray(key: "formats") ?? []
+        
+        let formatList: NSMutableArray = []
+        for index in formats {
+            formatList.add(BarcodeFormat(rawValue: index))
+        }
+        
+        let barcodeOptions = BarcodeScannerOptions(formats: formatList.firstObject as! BarcodeFormat)
+        scanner = BarcodeScanner.barcodeScanner(options: barcodeOptions)
         
         // Set the camera to use
         position = facing == 0 ? AVCaptureDevice.Position.front : .back
@@ -357,4 +366,8 @@ class MapArgumentReader {
     return args?[key] as? [String]
   }
     
+    func intArray(key: String) -> [Int]? {
+      return args?[key] as? [Int]
+    }
+  
 }

@@ -24,12 +24,9 @@ class MobileScanner extends StatefulWidget {
   final BoxFit fit;
 
   /// Create a [MobileScanner] with a [controller], the [controller] must has been initialized.
-  const MobileScanner({
-    Key? key,
-    this.onDetect,
-    this.controller,
-    this.fit = BoxFit.cover,
-  }) : super(key: key);
+  const MobileScanner(
+      {Key? key, this.onDetect, this.controller, this.fit = BoxFit.cover})
+      : super(key: key);
 
   @override
   State<MobileScanner> createState() => _MobileScannerState();

 import 'dart:async';
+import 'dart:io';
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/services.dart';
@@ -43,6 +44,11 @@ class MobileScannerController {
   final Ratio? ratio;
   final bool? torchEnabled;
 
+  /// If provided, the scanner will only detect those specific formats.
+  ///
+  /// WARNING: On iOS, only 1 format is supported.
+  final List<BarcodeFormat>? formats;
+
   CameraFacing facing;
   bool hasTorch = false;
   late StreamController<Barcode> barcodesController;
@@ -50,7 +56,10 @@ class MobileScannerController {
   Stream<Barcode> get barcodes => barcodesController.stream;
 
   MobileScannerController(
-      {this.facing = CameraFacing.back, this.ratio, this.torchEnabled}) {
+      {this.facing = CameraFacing.back,
+      this.ratio,
+      this.torchEnabled,
+      this.formats}) {
     // In case a new instance is created before calling dispose()
     if (_controllerHashcode != null) {
       stop();
@@ -138,6 +147,14 @@ class MobileScannerController {
     if (ratio != null) arguments['ratio'] = ratio;
     if (torchEnabled != null) arguments['torch'] = torchEnabled;
 
+    if (formats != null) {
+      if (Platform.isAndroid) {
+        arguments['formats'] = formats!.map((e) => e.index).toList();
+      } else if (Platform.isIOS || Platform.isMacOS) {
+        arguments['formats'] = formats!.map((e) => e.rawValue).toList();
+      }
+    }
+
     // Start the camera with arguments
     Map<String, dynamic>? startResult = {};
     try {

@@ -553,6 +553,43 @@ enum BarcodeFormat {
   aztec,
 }
 
+extension BarcodeValue on BarcodeFormat {
+  int get rawValue {
+    switch (this) {
+      case BarcodeFormat.unknown:
+        return -1;
+      case BarcodeFormat.all:
+        return 0;
+      case BarcodeFormat.code128:
+        return 1;
+      case BarcodeFormat.code39:
+        return 2;
+      case BarcodeFormat.code93:
+        return 4;
+      case BarcodeFormat.codebar:
+        return 8;
+      case BarcodeFormat.dataMatrix:
+        return 16;
+      case BarcodeFormat.ean13:
+        return 32;
+      case BarcodeFormat.ean8:
+        return 64;
+      case BarcodeFormat.itf:
+        return 128;
+      case BarcodeFormat.qrCode:
+        return 256;
+      case BarcodeFormat.upcA:
+        return 512;
+      case BarcodeFormat.upcE:
+        return 1024;
+      case BarcodeFormat.pdf417:
+        return 2048;
+      case BarcodeFormat.aztec:
+        return 4096;
+    }
+  }
+}
+
 /// Address type constants.
 enum AddressType {
   /// Unknown address type.