From cf1c7515fb87283915412c7718917a0d9902221f Mon Sep 17 00:00:00 2001
From: Hugh Nimmo-Smith <hughns@element.io>
Date: Tue, 18 Oct 2022 00:35:13 +0100
Subject: [PATCH] Automatically try again on partial failed QR scan

---
 .../features/login/qr/QrCodeLoginInstructionsFragment.kt   | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/vector/src/main/java/im/vector/app/features/login/qr/QrCodeLoginInstructionsFragment.kt b/vector/src/main/java/im/vector/app/features/login/qr/QrCodeLoginInstructionsFragment.kt
index efd23f2530..40fcbbbb85 100644
--- a/vector/src/main/java/im/vector/app/features/login/qr/QrCodeLoginInstructionsFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/login/qr/QrCodeLoginInstructionsFragment.kt
@@ -63,6 +63,7 @@ class QrCodeLoginInstructionsFragment : VectorBaseFragment<FragmentQrCodeLoginIn
             val scannedQrCode = QrCodeScannerActivity.getResultText(activityResult.data)
             val wasQrCode = QrCodeScannerActivity.getResultIsQrCode(activityResult.data)
 
+            Timber.d("Scanned QR code: $scannedQrCode, was QR code: $wasQrCode")
             if (wasQrCode && !scannedQrCode.isNullOrBlank()) {
                 onQrCodeScanned(scannedQrCode)
             } else {
@@ -76,7 +77,11 @@ class QrCodeLoginInstructionsFragment : VectorBaseFragment<FragmentQrCodeLoginIn
     }
 
     private fun onQrCodeScannerFailed() {
-        Timber.d("QrCodeLoginInstructionsFragment.onQrCodeScannerFailed")
+        // The user scanned something unexpected, so we try scanning again.
+        // This seems to happen particularly with the large QRs needed for rendezvous
+        // especially when the QR is partially off the screen
+        Timber.d("QrCodeLoginInstructionsFragment.onQrCodeScannerFailed - showing scanner again")
+        QrCodeScannerActivity.startForResult(requireActivity(), scanActivityResultLauncher)
     }
 
     override fun invalidate() = withState(viewModel) { state ->