Fix cursor jump

CHANGELOG.md

@@ -30,6 +30,7 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 - We fixed an error where the number of matched entries shown in the group pane was not updated correctly. [#4441](https://github.com/JabRef/jabref/issues/4441)
 - We fixed an issue where empty keywords lead to a strange display of automatic keyword groups. [#5333](https://github.com/JabRef/jabref/issues/5333)
 - We fixed an error where the default color of a new group was white instead of dark gray. [#4868](https://github.com/JabRef/jabref/issues/4868)
+- We fixed an issue where the first field in the entry editor got the focus while performing a different action (like searching). [#5084](https://github.com/JabRef/jabref/issues/5084)
 - We fixed an error mentioning "javafx.controls/com.sun.javafx.scene.control" that was thrown when interacting with the toolbar.
 - We fixed an error where a cleared search was restored after switching libraries. [#4846](https://github.com/JabRef/jabref/issues/4846) 
 - We fixed an exception which occurred when trying to open a non-existing file from the "Recent files"-menu [#5334](https://github.com/JabRef/jabref/issues/5334)

src/main/java/org/jabref/gui/entryeditor/FieldsEditorTab.java

@@ -5,13 +5,11 @@
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.SortedSet;
 import java.util.stream.Stream;
 
 import javax.swing.undo.UndoManager;
 
-import javafx.application.Platform;
 import javafx.geometry.VPos;
 import javafx.scene.Node;
 import javafx.scene.Parent;
@@ -46,7 +44,6 @@ abstract class FieldsEditorTab extends EntryEditorTab {
     private final SuggestionProviders suggestionProviders;
     private final DialogService dialogService;
     private PreviewPanel previewPanel;
-    private FieldEditorFX activeField;
     private UndoManager undoManager;
     private Collection<Field> fields = new ArrayList<>();
     private GridPane gridPane;
@@ -82,19 +79,13 @@ private void setupPanel(BibEntry entry, boolean compressed, SuggestionProviders
         fields = determineFieldsToShow(entry);
 
         List<Label> labels = new ArrayList<>();
-        boolean isFirstField = true;
         for (Field field : fields) {
             FieldEditorFX fieldEditor = FieldEditors.getForField(field, Globals.TASK_EXECUTOR, dialogService,
                     Globals.journalAbbreviationLoader.getRepository(Globals.prefs.getJournalAbbreviationPreferences()),
                     Globals.prefs, databaseContext, entry.getType(), suggestionProviders, undoManager);
             fieldEditor.bindToEntry(entry);
 
             editors.put(field, fieldEditor);
-            if (isFirstField) {
-                activeField = fieldEditor;
-                isFirstField = false;
-            }
-
             labels.add(new FieldNameLabel(field));
         }
 
@@ -161,8 +152,7 @@ private void setCompressedRowLayout(GridPane gridPane, int rows) {
      */
     public void requestFocus(Field fieldName) {
         if (editors.containsKey(fieldName)) {
-            activeField = editors.get(fieldName);
-            activeField.focus();
+            editors.get(fieldName).focus();
         }
     }
 
@@ -171,30 +161,12 @@ public boolean shouldShow(BibEntry entry) {
         return !determineFieldsToShow(entry).isEmpty();
     }
 
-    @Override
-    public void handleFocus() {
-        if (activeField != null) {
-            activeField.focus();
-        }
-    }
-
     @Override
     protected void bindToEntry(BibEntry entry) {
-        Optional<Field> selectedFieldName = editors.entrySet()
-                                                   .stream()
-                                                   .filter(editor -> editor.getValue().childIsFocused())
-                                                   .map(Map.Entry::getKey)
-                                                   .findFirst();
-
         initPanel();
         setupPanel(entry, isCompressed, suggestionProviders, undoManager);
 
         previewPanel.setEntry(entry);
-
-        Platform.runLater(() -> {
-            // Restore focus to field (run this async so that editor is already initialized correctly)
-            selectedFieldName.ifPresent(this::requestFocus);
-        });
     }
 
     @Override