feat: Implement cornerPoints and frame for scanned codes (#2117)

* Android & TypeScript part of scanned code corner points. Scanned frame dimensions also included in callback. #2076

* TS fix. #2076

* Implement iOS parts of code scanner corner points with additional scanned frame data.

* Add example page for code scanning

* Use Point type from Point.ts

* Update package/src/CodeScanner.ts

Add parameters description to CodeScanner callback.

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Update package/src/CodeScanner.ts

More expressive description for CodeScannerFrame.

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Update package/src/CodeScanner.ts

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Update package/src/CodeScanner.ts

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Update package/ios/Core/CameraSession+CodeScanner.swift

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Update package/ios/Core/CameraSession+CodeScanner.swift

Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

* Remove default values from CodeSCannerFrame

* Linting

* Multiply code corner points in swift

---------

Co-authored-by: stemy <balazs.stemler@metrix.co.hu>
Co-authored-by: Zoli <iamzozo@metrix.co.hu>
Co-authored-by: Marc Rousavy <marcrousavy@hotmail.com>

package/ios/CameraView.swift

@@ -291,12 +291,13 @@ public final class CameraView: UIView, CameraSessionDelegate {
     #endif
   }
 
-  func onCodeScanned(codes: [CameraSession.Code]) {
+  func onCodeScanned(codes: [CameraSession.Code], scannerFrame: CameraSession.CodeScannerFrame) {
     guard let onCodeScanned = onCodeScanned else {
       return
     }
     onCodeScanned([
       "codes": codes.map { $0.toJSValue() },
+      "frame": scannerFrame.toJSValue(),
     ])
   }
 

package/ios/Core/CameraSession+CodeScanner.swift

@@ -28,8 +28,12 @@ extension CameraSession: AVCaptureMetadataOutputObjectsDelegate {
     // Map codes to JS values
     let codes = metadataObjects.map { object in
       var value: String?
+      var corners: [CGPoint]?
       if let code = object as? AVMetadataMachineReadableCodeObject {
         value = code.stringValue
+        corners = code.corners.map {
+          CGPoint(x: $0.x * Double(size.width), y: $0.y * Double(size.height))
+        }
       }
       let x = object.bounds.origin.x * Double(size.width)
       let y = object.bounds.origin.y * Double(size.height)
@@ -37,11 +41,11 @@ extension CameraSession: AVCaptureMetadataOutputObjectsDelegate {
       let h = object.bounds.height * Double(size.height)
       let frame = CGRect(x: x, y: y, width: w, height: h)
 
-      return Code(type: object.type, value: value, frame: frame)
+      return Code(type: object.type, value: value, frame: frame, corners: corners)
     }
 
     // Call delegate (JS) event
-    onCodeScanned(codes)
+    onCodeScanned(codes, CodeScannerFrame(width: size.width, height: size.height))
   }
 
   /**
@@ -61,6 +65,11 @@ extension CameraSession: AVCaptureMetadataOutputObjectsDelegate {
      */
     let frame: CGRect
 
+    /**
+      Location of the code on-screen, relative to the video output layer
+     */
+    let corners: [CGPoint]?
+
     /**
      Converts this Code to a JS Object (Dictionary)
      */
@@ -74,6 +83,22 @@ extension CameraSession: AVCaptureMetadataOutputObjectsDelegate {
           "width": frame.size.width,
           "height": frame.size.height,
         ],
+        "corners": corners?.map { [
+          "x": $0.x,
+          "y": $0.y,
+        ] } ?? [],
+      ]
+    }
+  }
+
+  struct CodeScannerFrame {
+    let width: Int32
+    let height: Int32
+
+    func toJSValue() -> [String: AnyHashable] {
+      return [
+        "width": width,
+        "height": height,
       ]
     }
   }

package/ios/Core/CameraSessionDelegate.swift

@@ -28,5 +28,5 @@ protocol CameraSessionDelegate: AnyObject {
   /**
    Called whenever a QR/Barcode has been scanned. Only if the CodeScanner Output is enabled
    */
-  func onCodeScanned(codes: [CameraSession.Code])
+  func onCodeScanned(codes: [CameraSession.Code], scannerFrame: CameraSession.CodeScannerFrame)
 }