Added special searches

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

@@ -190,6 +190,15 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                 if (find == null)
                     match = true;
                 else {
+                    if (find.startsWith(context.getString(R.string.title_search_special_prefix) + ":")) {
+                        String special = find.split(":")[1];
+                        if (context.getString(R.string.title_search_special_unseen).equals(special))
+                            match = !message.ui_seen;
+                        else if (context.getString(R.string.title_search_special_flagged).equals(special))
+                            match = message.ui_flagged;
+                        else if (context.getString(R.string.title_search_special_snoozed).equals(special))
+                            match = (message.ui_snoozed != null);
+                    } else {
                         if (message.from != null && message.from.length > 0)
                             for (int j = 0; j < message.from.length && !match; j++)
                                 match = message.from[j].toString().toLowerCase().contains(find);
@@ -217,6 +226,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                             }
                         }
                     }
+                }
 
                 if (match) {
                     found++;
@@ -281,7 +291,15 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                 Log.i("Boundary server query=" + query);
                 if (query == null)
                     imessages = ifolder.getMessages();
-                else {
+                else if (query.startsWith(context.getString(R.string.title_search_special_prefix) + ":")) {
+                    String special = query.split(":")[1];
+                    if (context.getString(R.string.title_search_special_unseen).equals(special))
+                        imessages = ifolder.search(new FlagTerm(new Flags(Flags.Flag.SEEN), false));
+                    else if (context.getString(R.string.title_search_special_flagged).equals(special))
+                        imessages = ifolder.search(new FlagTerm(new Flags(Flags.Flag.FLAGGED), true));
+                    else
+                        imessages = new Message[0];
+                } else {
                     Object result = ifolder.doCommand(new IMAPFolder.ProtocolCommand() {
                         @Override
                         public Object doCommand(IMAPProtocol protocol) {

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

@@ -31,6 +31,7 @@ import android.content.IntentFilter;
 import android.content.IntentSender;
 import android.content.SharedPreferences;
 import android.database.Cursor;
+import android.database.MatrixCursor;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.PorterDuff;
@@ -69,6 +70,7 @@ import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.ArrayAdapter;
+import android.widget.AutoCompleteTextView;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.ImageButton;
@@ -2282,11 +2284,30 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             searchView.setQuery(searching, false);
         }
 
+        AutoCompleteTextView autoCompleteTextView = searchView.findViewById(androidx.appcompat.R.id.search_src_text);
+        autoCompleteTextView.setThreshold(0);
+
         searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
             @Override
             public boolean onQueryTextChange(String newText) {
                 searching = newText;
 
+                if (TextUtils.isEmpty(newText)) {
+                    MatrixCursor cursor = new MatrixCursor(new String[]{"_id", "suggestion"});
+                    String prefix = getString(R.string.title_search_special_prefix);
+                    cursor.addRow(new Object[]{-1, prefix + ":" + getString(R.string.title_search_special_unseen)});
+                    cursor.addRow(new Object[]{-2, prefix + ":" + getString(R.string.title_search_special_flagged)});
+                    cursor.addRow(new Object[]{-3, prefix + ":" + getString(R.string.title_search_special_snoozed)});
+                    SimpleCursorAdapter adapter = new SimpleCursorAdapter(
+                            getContext(),
+                            R.layout.search_suggestion,
+                            cursor,
+                            new String[]{"suggestion"},
+                            new int[]{android.R.id.text1},
+                            0);
+                    searchView.setSuggestionsAdapter(adapter);
+                    adapter.notifyDataSetChanged();
+                } else {
                     Bundle args = new Bundle();
                     args.putString("query", newText);
 
@@ -2318,6 +2339,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                             Helper.unexpectedError(getFragmentManager(), ex);
                         }
                     }.execute(FragmentMessages.this, args, "messages:suggestions");
+                }
 
                 return true;
             }

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

@@ -783,6 +783,11 @@
     <string name="title_crash_info_remark">Please describe what you were doing when the app crashed:</string>
     <string name="title_issue_subject" translatable="false">FairEmail %1$s issue</string>
 
+    <string name="title_search_special_prefix">special</string>
+    <string name="title_search_special_unseen">unread</string>
+    <string name="title_search_special_flagged">starred</string>
+    <string name="title_search_special_snoozed">snoozed</string>
+
     <string-array name="pollIntervalNames">
         <item>Always</item>
         <item>Every 15 minutes</item>