Add selection box for content selectors next to keyword field

CHANGELOG.md

@@ -1216,6 +1216,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed an issue where opening the menu 'Library properties' marked the library as modified [#6451](https://github.com/JabRef/jabref/issues/6451)
 - We fixed an issue when importing resulted in an exception [#7343](https://github.com/JabRef/jabref/issues/7343)
 - We fixed an issue where the field in the Field formatter dropdown selection were sorted in random order. [#7710](https://github.com/JabRef/jabref/issues/7710)
+- We added a selection box next to the keywords field, The list is filled with the contents of the content selectors, excluding existing keywords. [#10560](https://github.com/JabRef/jabref/issues/10560)
 
 ### Removed
 

src/main/java/org/jabref/gui/fieldeditors/FieldEditors.java

@@ -96,7 +96,7 @@ public static FieldEditorFX getForField(final Field field,
         } else if (fieldProperties.contains(FieldProperty.PERSON_NAMES)) {
             return new PersonsEditor(field, suggestionProvider, preferences, fieldCheckers, isMultiLine, undoManager);
         } else if (StandardField.KEYWORDS == field) {
-            return new KeywordsEditor(field, suggestionProvider, fieldCheckers, preferences, undoManager);
+            return new KeywordsEditor(field, suggestionProvider, fieldCheckers, preferences, undoManager, databaseContext);
         } else if (field == InternalField.KEY_FIELD) {
             return new CitationKeyEditor(field, suggestionProvider, fieldCheckers, databaseContext);
         } else {

src/main/java/org/jabref/gui/fieldeditors/KeywordsEditor.java

@@ -2,23 +2,39 @@
 
 import javax.swing.undo.UndoManager;
 
+import javafx.scene.control.ComboBox;
+
 import org.jabref.gui.autocompleter.SuggestionProvider;
 import org.jabref.logic.integrity.FieldCheckers;
+import org.jabref.model.database.BibDatabaseContext;
 import org.jabref.model.entry.field.Field;
+import org.jabref.model.entry.field.StandardField;
 import org.jabref.preferences.PreferencesService;
 
 public class KeywordsEditor extends SimpleEditor implements FieldEditorFX {
 
+    private final BibDatabaseContext databaseContext;
+    private ComboBox<String> keywordsComboBox;
     public KeywordsEditor(Field field,
                           SuggestionProvider<?> suggestionProvider,
                           FieldCheckers fieldCheckers,
                           PreferencesService preferences,
-                          UndoManager undoManager) {
+                          UndoManager undoManager,
+                          BibDatabaseContext databaseContext) {
         super(field, suggestionProvider, fieldCheckers, preferences, undoManager);
+        this.databaseContext = databaseContext;
+        this.keywordsComboBox = createKeywordsComboBox();
+        this.getChildren().add(keywordsComboBox);
     }
 
     @Override
     public double getWeight() {
         return 2;
     }
+
+    private ComboBox<String> createKeywordsComboBox() {
+        ComboBox<String> comboBox = new ComboBox<>();
+        comboBox.getItems().addAll(databaseContext.getMetaData().getContentSelectorValuesForField(StandardField.KEYWORDS));
+        return comboBox;
+    }
 }

src/main/java/org/jabref/gui/libraryproperties/contentselectors/ContentSelectorView.java

@@ -83,6 +83,7 @@ private void removeFieldName() {
     @FXML
     private void addNewKeyword() {
         getSelectedField().ifPresent(viewModel::showInputKeywordDialog);
+
     }
 
     @FXML

src/main/java/org/jabref/gui/libraryproperties/contentselectors/ContentSelectorViewModel.java

@@ -175,6 +175,7 @@ void showInputKeywordDialog(Field selectedField) {
                      .ifPresent(newKeyword -> addKeywordIfUnique(selectedField, newKeyword));
     }
 
+
     private void addKeywordIfUnique(Field field, String keywordToAdd) {
         boolean exists = fieldKeywordsMap.get(field).contains(keywordToAdd);
         if (exists) {