Add drop down for citation key patterns

[priyanshu16095]

Fixes #12502

This PR introduces a functionality to display a drop-down list of matching suggestions when typing a citation key pattern.

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• Change in CHANGELOG.md described in a way that is understandable for the average user (if change is visible to the user)
• Tests created for changes (if applicable)
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• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked 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 to the documentation repository.

[koppor]

Screenshot?

[priyanshu16095]

Recording.2025-02-16.mp4

The positioning of list is not perfect, it comes on top of it, else works fine and the list of patterns is hardcoded.

[subhramit]

I know it's a draft, but requesting a minor change.
Really good work so far! Thanks for picking this up.

[subhramit]

Also add [authorsAlphaLNI] (added in #12499).
Also, the issue asks for special field markers, which also includes Editor-related field markers, Title-related field markers, Other field markers and Bibentry fields apart from the author-related ones. Please add them as well.

[koppor]

We should either think how to auto-populate this list - or add a Java comment on how to populate the list manually.

[subhramit]

Yes, @priyanshu16095 - lets make this neat.
This is what I brainstormed, need a second opinion from @Siedlerchr and @koppor so that we know this is the best way and doesn't break things:
There is a record class, CitationKeyPatterns.java.

1. Modify it to make it a final class.
2. Hardcode the patterns as constants there. Leave proper comments with //region - citation key patterns offered. for any new pattern, add them here and // endregion below.
3. Make a public static function getAllPatterns, see if this works (I chatgpt'd this snippet - make any modifications needed):

Arrays.stream(CitationKeyPatterns.class.getDeclaredFields())
             .filter(field -> {
                 int modifiers = field.getModifiers();
                 return Modifier.isPublic(modifiers) && 
                        Modifier.isStatic(modifiers) && 
                        Modifier.isFinal(modifiers) &&
                        field.getType() == CitationKeyPattern.class &&
                        field != CitationKeyPattern.NULL_CITATION_KEY_PATTERN;
             })
             .map(field -> {
                 try {
                     return (CitationKeyPattern) field.get(null);
                 } catch (IllegalAccessException e) {
                     throw new RuntimeException("Could not access field", e);
                 }
             })
             .collect(Collectors.toList());

4. Use that list returned in your observable array list

This way, the developer has to just change one line when adding a new pattern, without the overhead of finding the list where patterns are populated, or just using raw strings or using constants (you have to put them everywhere otherwise).

[subhramit]

Actually no need to even change the class type. You can add the method in the record itself.

[priyanshu16095]

Sure! Great suggestions, thanks!

[priyanshu16095]

Recording.2025-02-18.mp4

For CitationKeyPatternSuggestionCell, I found this solution on Stack Overflow and a similar gist on Github Gist and modified it.

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[priyanshu16095]

There is a problem with using the context menu because when it reaches the bottom of the screen, it shifts upward, making the UI buggy.
Instead, we can use a VBox or any other suggestions?

[koppor]

There is a problem with using the context menu because when it reaches the bottom of the screen, it shifts upward, making the UI buggy. Instead, we can use a VBox or any other suggestions?

If you don't get an answer quickly, just assume that nobody has a clue and will need invest time to investigate. Thus, go ahead and try.

Note that we could accept a different UI using a popup and buttons -similar to "Select entry type" -- if this works better

---

With this, we could even recommend certain citation key paterns.

[priyanshu16095]

The feature is now complete.
For the last element, it works fine, and the context menu does not change its position.

[subhramit]

Move this to a class-level constant with a brief comment explaining its use and the value

[subhramit]

Tested it, works fine.
Code-wise too I can see everything I asked for.

Someone a bit deeper than me into javafx should take a closer look at the gui files.