Update sample app to add menu option to enable or disable relative line number

Author: AmrDeveloper

app/src/main/java/com/amrdeveloper/codeviewlibrary/MainActivity.java

@@ -171,6 +171,7 @@ public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         else if (menuItemId == R.id.comment) commentManager.commentSelected();
         else if (menuItemId == R.id.un_comment) commentManager.unCommentSelected();
         else if (menuItemId == R.id.clearText) codeView.setText("");
+        else if (menuItemId == R.id.toggle_relative_line_number) toggleRelativeLineNumber();
         else if (menuItemId == R.id.undo) undoRedoManager.undo();
         else if (menuItemId == R.id.redo) undoRedoManager.redo();
 
@@ -204,6 +205,12 @@ private void changeTheEditorTheme(int themeId) {
         }
     }
 
+    private void toggleRelativeLineNumber() {
+        boolean isRelativeLineNumberEnabled = codeView.isLineRelativeNumberEnabled();
+        isRelativeLineNumberEnabled = !isRelativeLineNumberEnabled;
+        codeView.setEnableRelativeLineNumber(isRelativeLineNumberEnabled);
+    }
+
     private void launchEditorButtonSheet() {
         final BottomSheetDialog dialog = new BottomSheetDialog(this);
         dialog.setContentView(R.layout.bottom_sheet_dialog);

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

@@ -78,7 +78,12 @@
         android:title="@string/uncomment" />
 
     <item
-        android:id="@+id/clearText"
+        android:id="@+id/toggle_relative_line_number"
         android:orderInCategory="8"
+        android:title="@string/relative_line_number" />
+
+    <item
+        android:id="@+id/clearText"
+        android:orderInCategory="9"
         android:title="@string/clear_text" />
 </menu>

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

@@ -11,6 +11,7 @@
     <string name="clear_text">Clear Text</string>
     <string name="comment">Comment</string>
     <string name="uncomment">UnComment</string>
+    <string name="relative_line_number">Relative Line Number</string>
     <string name="undo">Undo</string>
     <string name="redo">Redo</string>