Added button to simplify decryption

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -264,6 +264,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
         private RecyclerView rvAttachment;
         private CheckBox cbInline;
+        private ImageButton ibDecrypt;
         private Button btnDownloadAttachments;
         private Button btnSaveAttachments;
         private TextView tvNoInternetAttachments;
@@ -405,6 +406,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 bnvActions.setLayoutParams(lparam);
             }
 
+            ibDecrypt = vsBody.findViewById(R.id.ibDecrypt);
             ibImages = vsBody.findViewById(R.id.ibImages);
             ibFull = vsBody.findViewById(R.id.ibFull);
             tvBody = vsBody.findViewById(R.id.tvBody);
@@ -464,6 +466,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 ibNotifyContact.setOnClickListener(this);
                 ibAddContact.setOnClickListener(this);
 
+                ibDecrypt.setOnClickListener(this);
                 btnDownloadAttachments.setOnClickListener(this);
                 btnSaveAttachments.setOnClickListener(this);
 
@@ -496,6 +499,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 ibNotifyContact.setOnClickListener(null);
                 ibAddContact.setOnClickListener(null);
 
+                ibDecrypt.setOnClickListener(null);
                 btnDownloadAttachments.setOnClickListener(null);
                 btnSaveAttachments.setOnClickListener(null);
 
@@ -827,6 +831,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             pbCalendarWait.setVisibility(View.GONE);
 
             cbInline.setVisibility(View.GONE);
+            ibDecrypt.setVisibility(View.GONE);
             btnDownloadAttachments.setVisibility(View.GONE);
             btnSaveAttachments.setVisibility(View.GONE);
             tvNoInternetAttachments.setVisibility(View.GONE);
@@ -1110,6 +1115,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             Log.i("Show inline=" + show_inline);
 
             boolean has_inline = false;
+            boolean is_encrypted = false;
             boolean download = false;
             boolean save = (attachments.size() > 1);
             boolean downloading = false;
@@ -1119,6 +1125,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 boolean inline = (attachment.isInline() || TextUtils.isEmpty(attachment.name));
                 if (inline)
                     has_inline = true;
+                if (Objects.equals(attachment.encryption, EntityAttachment.PGP_MESSAGE))
+                    is_encrypted = true;
                 if (attachment.progress == null && !attachment.available)
                     download = true;
                 if (!attachment.available)
@@ -1241,6 +1249,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             cbInline.setOnCheckedChangeListener(null);
             cbInline.setChecked(show_inline);
             cbInline.setVisibility(has_inline ? View.VISIBLE : View.GONE);
+            ibDecrypt.setVisibility(is_encrypted ? View.VISIBLE : View.GONE);
             btnDownloadAttachments.setVisibility(download && suitable ? View.VISIBLE : View.GONE);
             btnSaveAttachments.setVisibility(save ? View.VISIBLE : View.GONE);
             tvNoInternetAttachments.setVisibility(downloading && !suitable ? View.VISIBLE : View.GONE);
@@ -1369,7 +1378,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             if (message == null)
                 return;
 
-            if (view.getId() == R.id.ivSnoozed)
+            if (view.getId() == R.id.ibDecrypt)
+                onMenuDecrypt(message);
+            else if (view.getId() == R.id.ivSnoozed)
                 onShowSnoozed(message);
             else if (view.getId() == R.id.ivFlagged)
                 onToggleFlag(message);

app/src/main/res/drawable/baseline_no_encryption_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M21,21.78L4.22,5 3,6.22l2.04,2.04C4.42,8.6 4,9.25 4,10v10c0,1.1 0.9,2 2,2h12c0.23,0 0.45,-0.05 0.66,-0.12L19.78,23 21,21.78zM8.9,6c0,-1.71 1.39,-3.1 3.1,-3.1s3.1,1.39 3.1,3.1v2H9.66L20,18.34V10c0,-1.1 -0.9,-2 -2,-2h-1V6c0,-2.76 -2.24,-5 -5,-5 -2.56,0 -4.64,1.93 -4.94,4.4L8.9,7.24V6z"/>
+</vector>

app/src/main/res/layout/include_message_navigation.xml

@@ -18,6 +18,17 @@
         app:layout_constraintTop_toTopOf="parent"
         app:menu="@menu/action_message" />
 
+    <ImageButton
+        android:id="@+id/ibDecrypt"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="3dp"
+        android:layout_marginEnd="6dp"
+        android:contentDescription="@string/title_decrypt"
+        android:src="@drawable/baseline_no_encryption_24"
+        app:layout_constraintEnd_toStartOf="@+id/ibImages"
+        app:layout_constraintTop_toBottomOf="@id/bnvActions" />
+
     <ImageButton
         android:id="@+id/ibImages"
         android:layout_width="wrap_content"