Allow to disable scrolling of the top bar in settings

app/src/main/java/app/fedilab/android/BaseMainActivity.java

@@ -71,6 +71,7 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.widget.PopupMenu;
 import androidx.appcompat.widget.SearchView;
+import androidx.appcompat.widget.Toolbar;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.core.view.GravityCompat;
@@ -97,6 +98,7 @@ import com.bumptech.glide.request.RequestOptions;
 import com.bumptech.glide.request.target.CustomTarget;
 import com.bumptech.glide.request.target.Target;
 import com.bumptech.glide.request.transition.Transition;
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.bottomnavigation.BottomNavigationView;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.navigation.NavigationView;
@@ -1377,6 +1379,7 @@ public abstract class BaseMainActivity extends BaseActivity implements NetworkSt
         if (actionBar != null) {
             actionBar.setDisplayShowTitleEnabled(false);
         }
+        manageTopBarScrolling(binding.toolbar);
         rateThisApp();
 
         binding.compose.setOnClickListener(v -> startActivity(new Intent(this, ComposeActivity.class)));
@@ -1600,6 +1603,23 @@ public abstract class BaseMainActivity extends BaseActivity implements NetworkSt
         fetchRecentAccounts(BaseMainActivity.this, headerMainBinding);
     }
 
+    private void manageTopBarScrolling(Toolbar toolbar) {
+        final SharedPreferences sharedpreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        final boolean topBarScrolling = !sharedpreferences.getBoolean(getString(R.string.SET_DISABLE_TOPBAR_SCROLLING), false);
+
+        final AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+
+        int scrollFlags = toolbarLayoutParams.getScrollFlags();
+
+        if (topBarScrolling) {
+            scrollFlags |= AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL;
+
+        } else {
+            scrollFlags &= ~AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL;
+        }
+        toolbarLayoutParams.setScrollFlags(scrollFlags);
+    }
+
     private void manageFilters(int position) {
         View view = binding.bottomNavView.findViewById(R.id.nav_home);
         boolean showExtendedFilter = true;

app/src/main/java/app/fedilab/android/mastodon/activities/ContextActivity.java

@@ -30,10 +30,13 @@ import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.PreferenceManager;
 
+import com.google.android.material.appbar.AppBarLayout;
+
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.regex.Matcher;
@@ -87,6 +90,7 @@ public class ContextActivity extends BaseActivity implements FragmentMastodonCon
             getSupportActionBar().setDisplayHomeAsUpEnabled(true);
             getSupportActionBar().setDisplayShowHomeEnabled(true);
         }
+        manageTopBarScrolling(binding.toolbar, sharedpreferences);
         displayCW = sharedpreferences.getBoolean(getString(R.string.SET_EXPAND_CW), false);
         focusedStatus = null; // or other values
         MastodonHelper.loadPPMastodon(binding.profilePicture, currentAccount.mastodon_account);
@@ -131,6 +135,22 @@ public class ContextActivity extends BaseActivity implements FragmentMastodonCon
         outState.clear();
     }
 
+    private void manageTopBarScrolling(Toolbar toolbar, SharedPreferences sharedpreferences) {
+        final boolean topBarScrolling = !sharedpreferences.getBoolean(getString(R.string.SET_DISABLE_TOPBAR_SCROLLING), false);
+
+        final AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+
+        int scrollFlags = toolbarLayoutParams.getScrollFlags();
+
+        if (topBarScrolling) {
+            scrollFlags |= AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL;
+
+        } else {
+            scrollFlags &= ~AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL;
+        }
+        toolbarLayoutParams.setScrollFlags(scrollFlags);
+    }
+
     private void loadLocalConversation() {
         Bundle args = new Bundle();
         args.putSerializable(Helper.ARG_STATUS, focusedStatus);

app/src/main/java/app/fedilab/android/mastodon/ui/fragment/settings/FragmentInterfaceSettings.java

@@ -120,6 +120,9 @@ public class FragmentInterfaceSettings extends PreferenceFragmentCompat implemen
                     editor.putString(getString(R.string.SET_LOGO_LAUNCHER), newLauncher);
                 }
             }
+            if (key.compareToIgnoreCase(getString(R.string.SET_DISABLE_TOPBAR_SCROLLING)) == 0) {
+                recreate = true;
+            }
             editor.apply();
         }
     }

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

@@ -1065,6 +1065,7 @@
     <string name="SET_LONG_PRESS_STORE_MEDIA" translatable="false">SET_LONG_PRESS_STORE_MEDIA</string>
     <string name="SET_UNFOLLOW_VALIDATION" translatable="false">SET_UNFOLLOW_VALIDATION</string>
     <string name="SET_USE_SINGLE_TOPBAR" translatable="false">SET_USE_SINGLE_TOPBAR</string>
+    <string name="SET_DISABLE_TOPBAR_SCROLLING" translatable="false">SET_DISABLE_TOPBAR_SCROLLING</string>
     <string name="SET_DISPLAY_COUNTERS" translatable="false">SET_DISPLAY_COUNTERS</string>
     <string name="SET_DISPLAY_COMPACT_ACTION_BUTTON" translatable="false">SET_DISPLAY_COMPACT_ACTION_BUTTON</string>
 
@@ -1731,6 +1732,7 @@
     <string name="load_settings">Load exported settings</string>
     <string name="push_distributors">Push distributor</string>
     <string name="set_single_topbar_title">Single action bar</string>
+    <string name="set_disable_topbar_scrolling_title">Disable top bar scrolling</string>
     <string name="set_single_topbar">When enabled, the app will only have a single bar for timelines</string>
     <string name="set_timelines_in_a_list_title">Timelines in a list</string>
     <string name="set_timelines_in_a_list">When enabled, all pinned timelines will be displayed in a drop-down menu</string>

app/src/main/res/xml/pref_interface.xml

@@ -12,6 +12,13 @@
         app:summary="@string/set_single_topbar"
         app:title="@string/set_single_topbar_title" />
 
+    <SwitchPreferenceCompat
+        app:defaultValue="false"
+        app:iconSpaceReserved="false"
+        app:key="@string/SET_DISABLE_TOPBAR_SCROLLING"
+        app:singleLineTitle="false"
+        app:title="@string/set_disable_topbar_scrolling_title" />
+
     <SwitchPreferenceCompat
         app:defaultValue="false"
         app:iconSpaceReserved="false"