Changes in entry preview are not saved

[mlep]

JabRef 5.1--2020-05-04--b5599c9
Linux 4.9.0-12-amd64 amd64
Java 14.0.1

Changes in the entry preview format are accounted for only after restarting.

Note 1: may seem similar to issue #5464, but the present issue is about the content of the preview.
Note 2: issue is present with "Show preview as tab in entry editor" checked or unchecked.

Steps to reproduce the behavior:

1. Create a file with the following entry and save it

@Article{MyKey,
  author    = {Author1, Surname1 and Author2 Surname2},
  journal   = {The Journal title},
  title     = {The title of the article},
  year      = {2020},
  number    = {12},
  pages     = {1-100},
  volume    = {15},
 }

2. Go to Options -> Preferences -> Entry preview
3. Select "Preview" in the column "Selected"
4. Click on the Edit tab
5. Change
   \begin{journal} <em>\format[HTMLChars]{\journal}, </em>\end{journal}
   into
   \begin{journal} <em>\format[HTMLChars]{\journal},HereIsMyChange </em>\end{journal}
6. Go to the preview Tab.
   ==> The preview is updated accordingly.
7. Click on save
8. Edit the entry
   The preview shows:
   
   HereIsMyChange is not displayed ==> The preview is NOT updated.
9. Close and reopen JabRef
10. Edit the entry
    The preview shows:
    
    HereIsMyChange is displayed ==> The preview is updated NOW.

[Siedlerchr]

Thanks for the report. Does the Preview update if you close and reopen the entry editor?

[mlep]

No.
And it does not update if I switch tabs (between already-open files).
But the preview get updated if I close and reopen a file (but only for this file. Not for the ones in the other tabs).

[dimitra-karadima]

@Siedlerchr I am interested in this issue. Can you give me any suggestions or any relevant code where the bug might be?

[Siedlerchr]

@dimitra-karadima Some points: PreviewTab (in the preferences) as well and for the entry editor it might be the PreviewPanel. Probably that the PreviewPreferences are not reloaded in the PreviewPanel when a new style or a modified style is saved

Maybe @leitianjian can help you a bit, she/he worked recently in that area

[dimitra-karadima]

@Siedlerchr thanks for the guidance! I will check it out.

[dimitra-karadima]

My point of view was to find out where the new changes are being saved in order to update there the PreviewTab. I have found that this happens in https://github.com/JabRef/jabref/blob/master/src/main/java/org/jabref/gui/preferences/PreviewTabViewModel.java#L204 so I made an instance of PreviewPanel in order to update Layout, but it didn't work. I don't know if it is that I created a new Object or it was the wrong thought. @Siedlerchr or anyone else any thoughts?

[leitianjian]

Hi, I think this bug is hard to locate and has huge gaps between the previous bug I fixed and this one. I also stuck in it. If you don't mind and you don't work on it, I will fix this bug. If you are still working on it, keep going on, we can discuss it according to your progress. Sorry for my late reply. I do not receive any notification that I have been mentioned. Sorry again.

[dimitra-karadima]

@leitianjian I am not working on it because I am kinda stuck. All I have found was what I mentioned above. I am kind of busy so you can work on it if there are a lot of steps left, but if I am on the right path we can discuss it and try to find the solution together.

[leitianjian]

Thanks for your kindness. In fact, I find that your path is not exactly correct. We should not initialize another object of PreviewPanel which is JavaFX Vbox. I think we should modify some code to let the PreviewPanel content update after saving the preferences, which is a little difficult and deep tasks. The things I'm doing now is to figure out how the preview showing on the EntryEditor, and trying to give an elegant solution to update the preview. If you are still interested in it. Feel free to ask, we can work on this bug together.