Search via index: whole words only

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

@@ -105,6 +105,7 @@ public class FragmentDialogSearch extends FragmentDialogBase {
         ImageButton ibInvite = dview.findViewById(R.id.ibInvite);
         ImageButton ibAttachment = dview.findViewById(R.id.ibAttachment);
         ImageButton ibNotes = dview.findViewById(R.id.ibNotes);
+        TextView tvHintFts = dview.findViewById(R.id.tvHintFts);
         ibMore = dview.findViewById(R.id.ibMore);
         tvMore = dview.findViewById(R.id.tvMore);
         CheckBox cbSearchIndex = dview.findViewById(R.id.cbSearchIndex);
@@ -252,6 +253,8 @@ public class FragmentDialogSearch extends FragmentDialogBase {
             }
         });
 
+        tvHintFts.setVisibility(last_fts && fts && pro ? View.VISIBLE : View.GONE);
+
         View.OnClickListener onMore = new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -288,6 +291,7 @@ public class FragmentDialogSearch extends FragmentDialogBase {
             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 prefs.edit().putBoolean("last_fts", isChecked).apply();
+                tvHintFts.setVisibility(isChecked && fts && pro ? View.VISIBLE : View.GONE);
             }
         });
 

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

@@ -207,6 +207,18 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/btnSearch1" />
 
+        <TextView
+            android:id="@+id/tvHintFts"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:text="@string/title_search_hint_fts"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            android:textStyle="italic"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvHint" />
+
         <ImageButton
             android:id="@+id/ibMore"
             android:layout_width="wrap_content"
@@ -215,7 +227,7 @@
             android:background="?android:attr/selectableItemBackgroundBorderless"
             android:padding="3dp"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvHint"
+            app:layout_constraintTop_toBottomOf="@id/tvHintFts"
             app:srcCompat="@drawable/expander" />
 
         <TextView

app/src/main/res/values/strings.xml

@@ -1767,6 +1767,7 @@
         Initially, the search is performed on the device.
         To search the server too, tap the \'search again\' button.
     </string>
+    <string name="title_search_hint_fts">Search via index: whole words only</string>
     <string name="title_search_index_hint">Searching via the search index is fast, but only finds whole words.</string>
     <string name="title_search_text_hint">Searching for text in messages, when there are a large number of messages, might not work on some servers</string>
     <string name="title_search_text_unsupported">\'%s\' means that the mail server doesn\'t support searching in message texts</string>