show scan button in TrustKeys only if there is something to scan

1 files changed, 24 insertions, 1 deletions

diff --git a/src/main/java/de/pixart/messenger/ui/TrustKeysActivity.java b/src/main/java/de/pixart/messenger/ui/TrustKeysActivity.java
index 2e3a51bd4..c3ba5620f 100644
--- a/src/main/java/de/pixart/messenger/ui/TrustKeysActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/TrustKeysActivity.java
@@ -25,6 +25,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import de.pixart.messenger.Config;
 import de.pixart.messenger.R;
@@ -52,6 +53,8 @@ public class TrustKeysActivity extends OmemoActivity implements OnKeyStatusUpdat
     private Button mSaveButton;
     private Button mCancelButton;
 
+    private AtomicBoolean mUseCameraHintShown = new AtomicBoolean(false);
+
     private AxolotlService.FetchStatus lastFetchReport = AxolotlService.FetchStatus.SUCCESS;
 
     private final Map<String, Boolean> ownKeysToTrust = new HashMap<>();
@@ -116,11 +119,16 @@ public class TrustKeysActivity extends OmemoActivity implements OnKeyStatusUpdat
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.trust_keys, menu);
+        MenuItem scanQrCode = menu.findItem(R.id.action_scan_qr_code);
+        scanQrCode.setVisible(ownKeysToTrust.size() > 0 || foreignActuallyHasKeys());
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    private void showCameraToast() {
         mUseCameraHintToast = Toast.makeText(this,R.string.use_camera_icon_to_scan_barcode,Toast.LENGTH_LONG);
         ActionBar actionBar = getActionBar();
         mUseCameraHintToast.setGravity(Gravity.TOP | Gravity.END, 0 ,actionBar == null ? 0 : actionBar.getHeight());
         mUseCameraHintToast.show();
-        return super.onCreateOptionsMenu(menu);
     }
 
     @Override
@@ -220,6 +228,10 @@ public class TrustKeysActivity extends OmemoActivity implements OnKeyStatusUpdat
             }
         }
 
+        if ((hasOwnKeys || foreignActuallyHasKeys()) && mUseCameraHintShown.compareAndSet(false, true)) {
+            showCameraToast();
+        }
+
         ownKeysTitle.setText(mAccount.getJid().toBareJid().toString());
         ownKeysCard.setVisibility(hasOwnKeys ? View.VISIBLE : View.GONE);
         foreignKeys.setVisibility(hasForeignKeys ? View.VISIBLE : View.GONE);
@@ -245,6 +257,17 @@ public class TrustKeysActivity extends OmemoActivity implements OnKeyStatusUpdat
         }
     }
 
+    private boolean foreignActuallyHasKeys() {
+        synchronized (this.foreignKeysToTrust) {
+            for (Map.Entry<Jid, Map<String, Boolean>> entry : foreignKeysToTrust.entrySet()) {
+                if (entry.getValue().size() > 0) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     private boolean reloadFingerprints() {
         List<Jid> acceptedTargets = mConversation == null ? new ArrayList<Jid>() : mConversation.getAcceptedCryptoTargets();
         ownKeysToTrust.clear();