Add sort lexicographical descendant for notes application

app/src/main/java/it/niedermann/owncloud/notes/main/MainActivity.java

@@ -291,12 +291,8 @@ protected void onCreate(Bundle savedInstanceState) {
             updateSortMethodIcon(methodOfCategory.second);
             activityBinding.sortingMethod.setOnClickListener((v) -> {
                 if (methodOfCategory.first != null) {
-                    var newMethod = methodOfCategory.second;
-                    if (newMethod == CategorySortingMethod.SORT_LEXICOGRAPHICAL_ASC) {
-                        newMethod = CategorySortingMethod.SORT_MODIFIED_DESC;
-                    } else {
-                        newMethod = CategorySortingMethod.SORT_LEXICOGRAPHICAL_ASC;
-                    }
+                    //Rotate for next sorting method
+                    var newMethod = CategorySortingMethod.findById(methodOfCategory.second.getId() + 1);
                     final var modifyLiveData = mainViewModel.modifyCategoryOrder(methodOfCategory.first, newMethod);
                     modifyLiveData.observe(this, (next) -> modifyLiveData.removeObservers(this));
                 }
@@ -624,18 +620,30 @@ public boolean onSupportNavigateUp() {
      * Updates sorting method icon.
      */
     private void updateSortMethodIcon(CategorySortingMethod method) {
-        if (method == CategorySortingMethod.SORT_LEXICOGRAPHICAL_ASC) {
-            activityBinding.sortingMethod.setImageResource(R.drawable.alphabetical_asc);
-            activityBinding.sortingMethod.setContentDescription(getString(R.string.sort_last_modified));
-            if (SDK_INT >= O) {
-                activityBinding.sortingMethod.setTooltipText(getString(R.string.sort_last_modified));
-            }
-        } else {
-            activityBinding.sortingMethod.setImageResource(R.drawable.modification_desc);
-            activityBinding.sortingMethod.setContentDescription(getString(R.string.sort_alphabetically));
-            if (SDK_INT >= O) {
-                activityBinding.sortingMethod.setTooltipText(getString(R.string.sort_alphabetically));
-            }
+        CategorySortingMethod newMethod = (method != null) ? method: CategorySortingMethod.SORT_MODIFIED_DESC;
+        switch (newMethod){
+            case SORT_MODIFIED_DESC :
+                activityBinding.sortingMethod.setImageResource(R.drawable.modification_desc);
+                activityBinding.sortingMethod.setContentDescription(getString(R.string.sort_alphabetically));
+                if (SDK_INT >= O) {
+                    activityBinding.sortingMethod.setTooltipText(getString(R.string.sort_alphabetically));
+                }
+                break;
+            case SORT_LEXICOGRAPHICAL_ASC:
+                activityBinding.sortingMethod.setImageResource(R.drawable.alphabetical_asc);
+                activityBinding.sortingMethod.setContentDescription(getString(R.string.sort_alphabetically));
+                if (SDK_INT >= O) {
+                    activityBinding.sortingMethod.setTooltipText(getString(R.string.sort_alphabetically));
+                }
+                break;
+            case SORT_LEXICOGRAPHICAL_DESC:
+                activityBinding.sortingMethod.setImageResource(R.drawable.alphabetical_desc);
+                activityBinding.sortingMethod.setContentDescription(getString(R.string.sort_last_modified));
+                if (SDK_INT >= O) {
+                    activityBinding.sortingMethod.setTooltipText(getString(R.string.sort_last_modified));
+                }
+                break;
+            default: throw new IllegalStateException("Unknown method: " + method.name());
         }
     }
 

app/src/main/java/it/niedermann/owncloud/notes/main/MainViewModel.java

@@ -16,6 +16,7 @@
 import static it.niedermann.owncloud.notes.main.slots.SlotterUtil.fillListByInitials;
 import static it.niedermann.owncloud.notes.main.slots.SlotterUtil.fillListByTime;
 import static it.niedermann.owncloud.notes.shared.model.CategorySortingMethod.SORT_MODIFIED_DESC;
+import static it.niedermann.owncloud.notes.shared.model.CategorySortingMethod.SORT_LEXICOGRAPHICAL_ASC;
 import static it.niedermann.owncloud.notes.shared.model.ENavigationCategoryType.DEFAULT_CATEGORY;
 import static it.niedermann.owncloud.notes.shared.model.ENavigationCategoryType.FAVORITES;
 import static it.niedermann.owncloud.notes.shared.model.ENavigationCategoryType.RECENT;
@@ -282,9 +283,11 @@ private List<Item> fromNotes(List<Note> noteList, @NonNull NavigationCategory se
         }
         if (sortingMethod == SORT_MODIFIED_DESC) {
             return fillListByTime(getApplication(), noteList);
-        } else {
-            return fillListByInitials(getApplication(), noteList);
         }
+        if(sortingMethod != SORT_LEXICOGRAPHICAL_ASC){
+            Collections.reverse(noteList);
+        }
+        return fillListByInitials(getApplication(), noteList);
     }
 
     @NonNull

app/src/main/java/it/niedermann/owncloud/notes/shared/model/CategorySortingMethod.java

@@ -8,7 +8,8 @@
 
 public enum CategorySortingMethod {
     SORT_MODIFIED_DESC(0, "MODIFIED DESC"),
-    SORT_LEXICOGRAPHICAL_ASC(1, "TITLE COLLATE NOCASE ASC");
+    SORT_LEXICOGRAPHICAL_ASC(1, "TITLE COLLATE NOCASE ASC"),
+    SORT_LEXICOGRAPHICAL_DESC(2, "TITLE COLLATE NOCASE DESC");
 
     private final int id;
     private final String title;  // sorting method OrderBy for SQL
@@ -44,8 +45,10 @@ public String getTitle() {
      * @return the corresponding enum item with the index (ordinal)
      */
     public static CategorySortingMethod findById(int id) {
+        var newId = id % values().length;
+
         for (final var csm : values()) {
-            if (csm.getId() == id) {
+            if (csm.getId() == newId) {
                 return csm;
             }
         }

app/src/main/res/drawable/alphabetical_desc.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Nextcloud Notes - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
+  ~ SPDX-FileCopyrightText: 2018-2024 Andy Scherzinger
+  ~ SPDX-License-Identifier: Apache-2.0
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="26dp"
+    android:height="26dp"
+    android:viewportWidth="26"
+    android:viewportHeight="26">
+
+    <path
+        android:fillColor="#757575"
+        android:pathData="M 20.401 13.623 L 18.877 13.621 L 18.868 20.218 L 17.228 18.57 L 16.145 19.651 L 19.627 23.145 L 23.12 19.663 L 22.039 18.58 L 20.392 20.219 Z M 15.034 1.85 L 15.034 3.104 L 10.691 9.337 L 10.691 9.412 L 15.1 9.412 L 15.1 11.209 L 7.847 11.209 L 7.847 10.03 L 12.292 3.695 L 12.292 3.638 L 8.268 3.638 L 8.268 1.85 Z M 13.051 12.122 L 15.981 21.48 L 13.678 21.48 L 12.949 18.952 L 10.244 18.952 L 9.571 21.48 L 7.352 21.48 L 10.244 12.122 Z M 12.64 17.437 L 12.05 15.454 L 11.807 14.545 L 11.573 13.646 L 11.545 13.646 L 11.339 14.555 L 11.114 15.472 L 10.553 17.437 Z" />
+</vector>