Added quick search button for hidden messages

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

@@ -101,6 +101,7 @@ public class FragmentDialogSearch extends FragmentDialogBase {
         final ImageButton ibInfo = dview.findViewById(R.id.ibInfo);
         final ImageButton ibFlagged = dview.findViewById(R.id.ibFlagged);
         final ImageButton ibUnseen = dview.findViewById(R.id.ibUnseen);
+        final ImageButton ibHidden = dview.findViewById(R.id.ibHidden);
         final ImageButton ibInvite = dview.findViewById(R.id.ibInvite);
         final ImageButton ibAttachment = dview.findViewById(R.id.ibAttachment);
         final ImageButton ibNotes = dview.findViewById(R.id.ibNotes);
@@ -585,6 +586,8 @@ public class FragmentDialogSearch extends FragmentDialogBase {
                     criteria.with_flagged = true;
                 else if (id == R.id.ibUnseen)
                     criteria.with_unseen = true;
+                else if (id == R.id.ibHidden)
+                    criteria.with_hidden = true;
                 else if (id == R.id.ibInvite) {
                     criteria.with_attachments = true;
                     criteria.with_types = new String[]{"text/calendar"};
@@ -606,6 +609,7 @@ public class FragmentDialogSearch extends FragmentDialogBase {
         ibNotes.setOnClickListener(onClick);
         ibAttachment.setOnClickListener(onClick);
         ibInvite.setOnClickListener(onClick);
+        ibHidden.setOnClickListener(onClick);
         ibUnseen.setOnClickListener(onClick);
         ibFlagged.setOnClickListener(onClick);
 

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

@@ -43,7 +43,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginTop="12dp"
-            app:constraint_referenced_ids="ibFlagged,ibUnseen,ibInvite,ibAttachment,ibNotes"
+            app:constraint_referenced_ids="ibFlagged,ibUnseen,ibHidden,ibInvite,ibAttachment,ibNotes"
             app:flow_horizontalBias="0"
             app:flow_horizontalGap="12dp"
             app:flow_horizontalStyle="packed"
@@ -76,6 +76,18 @@
             app:srcCompat="@drawable/twotone_mail_24"
             tools:ignore="MissingConstraints" />
 
+        <ImageButton
+            android:id="@+id/ibHidden"
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/title_search_flag_hidden"
+            android:padding="6dp"
+            android:scaleType="fitCenter"
+            android:tooltipText="@string/title_search_flag_hidden"
+            app:srcCompat="@drawable/twotone_visibility_off_24"
+            tools:ignore="MissingConstraints" />
+
         <ImageButton
             android:id="@+id/ibInvite"
             android:layout_width="36dp"