Refine tab to move focus even when the last item is a button

[tejjgv]

Closes #11937

Description

Improve tab behavior to move focus even when the last item is a button

• Limit focus changes to fields within the EntryEditor, preventing jumps to unrelated UI components.

• Introduce static helper methods in EditorTextField to handle TAB key behavior.

• Ensure all TextField instances in SimpleEditor, CitationKeyEditor, PersonsEditor, and MarkdownEditor have proper IDs, enabling correct detection of the last field.

Steps to test

1. Open JabRef and load any entry in the Entry Editor.
2. Navigate through the fields in a tab using the TAB key.
3. When the focus reaches the last field of the current tab, press TAB again.
4. Verify that the focus moves directly to the first field of the next tab in the Entry Editor.
5. Repeat the process for multiple tabs to ensure that the focus does not jump to any fields outside the Entry Editor.
6. Test both single-line and multi-line fields (e.g., SimpleEditor, PersonsEditor, MarkdownEditor) to ensure TAB navigation works consistently.

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• I manually tested my changes in running JabRef (always required)
• I described the change in CHANGELOG.md in a way that is understandable for the average user (if change is visible to the user)
• I checked the user documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request updating file(s) in https://github.com/JabRef/user-documentation/tree/main/en.

Screen.Recording.2025-09-13.155910.mp4

[subhramit]

Would like if you could clarify, how is this change helping?
I don't see the field parameter being used anywhere here

[tejjgv]

The parameter isn’t used in this override, but it’s required to match the parent method’s signature. I could add a suppress annotation here

[subhramit]

If one is having to do that, it's probably a bad use case for overriding
Will think over this

[koppor]

Can't _ be used?

[tejjgv]

not using here

[subhramit]

What was meant is, can't you replace the suppresswarnings by just renaming the parameter to _?
It's a standard practice to mark them as placeholders to be ignored

[tejjgv]

thanks for the info, but it is not allowing me to name like that (even though im using java 24)

[trag-bot]

The method 'setupTabNavigation' allows null values for 'isLastFieldChecker' and 'nextTabSelector', which could lead to runtime errors. Consider using Optional to avoid null checks.

[trag-bot]

@trag-bot didn't find any issues in the code! ✅✨

[jabref-machine]

Your code currently does not meet JabRef's code guidelines. IntelliJ auto format covers some cases. There seem to be issues with your code style and autoformat configuration. Please reformat your code (Ctrl+Alt+L) and commit, then push.

In special cases, consider using // formatter:off and // formatter:on annotations to allow deviation from the code style.

[subhramit]

@tejjgv please do not resolve comments yourself (unless the change is very trivial). If the person who asked for the change (or someone else who is reviewing next) has verified that your changes are correct, they will resolve the conversation themselves.

[tejjgv]

@tejjgv please do not resolve comments yourself (unless the change is very trivial). If the person who asked for the change (or someone else who is reviewing next) has verified that your changes are correct, they will resolve the conversation themselves.

Sorry, I will not resolve comments myself from now on