Added search to unified folders view

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

@@ -40,6 +40,7 @@ import java.util.List;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.appcompat.widget.SearchView;
 import androidx.constraintlayout.widget.Group;
 import androidx.fragment.app.FragmentTransaction;
 import androidx.lifecycle.Observer;
@@ -61,6 +62,7 @@ public class FragmentFolders extends FragmentBase {
     private FloatingActionButton fab;
 
     private long account;
+    private boolean searching = false;
     private AdapterFolder adapter;
 
     private Boolean show_hidden = null;
@@ -328,17 +330,55 @@ public class FragmentFolders extends FragmentBase {
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.menu_folders, menu);
+
+        final MenuItem menuSearch = menu.findItem(R.id.menu_search);
+        menuSearch.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
+            @Override
+            public boolean onMenuItemActionExpand(MenuItem item) {
+                searching = true;
+                return true;
+            }
+
+            @Override
+            public boolean onMenuItemActionCollapse(MenuItem item) {
+                searching = false;
+                return true;
+            }
+        });
+        if (searching)
+            menuSearch.expandActionView();
+
+        final SearchView searchView = (SearchView) menuSearch.getActionView();
+        searchView.setQueryHint(getString(R.string.title_search_device));
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String query) {
+                searching = false;
+                menuSearch.collapseActionView();
+                FragmentMessages.search(getContext(), getViewLifecycleOwner(), getFragmentManager(), -1, query);
+                return true;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String newText) {
+                return false;
+            }
+        });
+
         super.onCreateOptionsMenu(menu, inflater);
     }
 
     @Override
     public void onPrepareOptionsMenu(Menu menu) {
+        menu.findItem(R.id.menu_search).setVisible(account < 0);
+
         MenuItem item = menu.findItem(R.id.menu_show_hidden);
         if (show_hidden != null) {
             item.setTitle(show_hidden ? R.string.title_hide_folders : R.string.title_show_folders);
             item.setIcon(show_hidden ? R.drawable.baseline_visibility_off_24 : R.drawable.baseline_visibility_24);
         }
         item.setVisible(show_hidden != null);
+
         super.onPrepareOptionsMenu(menu);
     }
 

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

@@ -80,6 +80,7 @@ import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentTransaction;
 import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.Observer;
 import androidx.lifecycle.ViewModelProviders;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
@@ -1672,40 +1673,7 @@ public class FragmentMessages extends FragmentBase {
             public boolean onQueryTextSubmit(String query) {
                 searching = false;
                 menuSearch.collapseActionView();
-
-                if (Helper.isPro(getContext())) {
-                    Bundle args = new Bundle();
-                    args.putLong("folder", folder);
-                    args.putString("search", query);
-
-                    new SimpleTask<Void>() {
-                        @Override
-                        protected Void onExecute(Context context, Bundle args) {
-                            DB.getInstance(context).message().resetSearch();
-                            return null;
-                        }
-
-                        @Override
-                        protected void onExecuted(Bundle args, Void data) {
-                            FragmentMessages fragment = new FragmentMessages();
-                            fragment.setArguments(args);
-
-                            FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
-                            fragmentTransaction.replace(R.id.content_frame, fragment).addToBackStack("search");
-                            fragmentTransaction.commit();
-                        }
-
-                        @Override
-                        protected void onException(Bundle args, Throwable ex) {
-                            Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
-                        }
-                    }.execute(FragmentMessages.this, args, "messages:resetsearch");
-                } else {
-                    FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
-                    fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
-                    fragmentTransaction.commit();
-                }
-
+                search(getContext(), getViewLifecycleOwner(), getFragmentManager(), folder, query);
                 return true;
             }
 
@@ -2504,6 +2472,43 @@ public class FragmentMessages extends FragmentBase {
         return super.onCreateAnimation(transit, enter, nextAnim);
     }
 
+    static void search(
+            final Context context, final LifecycleOwner owner, final FragmentManager manager,
+            long folder, String query) {
+        if (Helper.isPro(context)) {
+            Bundle args = new Bundle();
+            args.putLong("folder", folder);
+            args.putString("search", query);
+
+            new SimpleTask<Void>() {
+                @Override
+                protected Void onExecute(Context context, Bundle args) {
+                    DB.getInstance(context).message().resetSearch();
+                    return null;
+                }
+
+                @Override
+                protected void onExecuted(Bundle args, Void data) {
+                    FragmentMessages fragment = new FragmentMessages();
+                    fragment.setArguments(args);
+
+                    FragmentTransaction fragmentTransaction = manager.beginTransaction();
+                    fragmentTransaction.replace(R.id.content_frame, fragment).addToBackStack("search");
+                    fragmentTransaction.commit();
+                }
+
+                @Override
+                protected void onException(Bundle args, Throwable ex) {
+                    Helper.unexpectedError(context, owner, ex);
+                }
+            }.execute(context, owner, args, "search:reset");
+        } else {
+            FragmentTransaction fragmentTransaction = manager.beginTransaction();
+            fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
+            fragmentTransaction.commit();
+        }
+    }
+
     private class MoreResult {
         boolean seen;
         boolean unseen;

app/src/main/res/menu/menu_folders.xml

@@ -1,6 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_search"
+        android:icon="@drawable/baseline_search_24"
+        android:title="@string/title_search"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
+        app:showAsAction="collapseActionView|always" />
+
     <item
         android:id="@+id/menu_show_hidden"
         android:icon="@drawable/baseline_visibility_24"