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tmhedberg avatar tmhedberg commented on July 4, 2024

from simpylfold.

obrusvit avatar obrusvit commented on July 4, 2024

I can confirm this is occurring in my Vim setup exactly as nabeel-ms describes it.
However, If I close the file and then I open it again, the folds are correct again.

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tmhedberg avatar tmhedberg commented on July 4, 2024

Please paste the output of :set foldmethod? foldexpr? foldlevel? foldminlines? foldnestmax?.

What is the state of the existing folds in the file at the time that you add the additional line at the end? Are they open or closed?

I'm still not seeing this behavior, so I'm trying to figure out what's different for me.

It would still be helpful if you could try this with all plugins except for this one disabled. A lot of weird problems can be caused by the interaction between multiple plugins that weren't designed to work together, since Vim doesn't really isolate them.

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 avatar commented on July 4, 2024

The output is as follows:

foldmethod=expr
foldexpr=SimpylFold#FoldExpr(v:lnum)
foldlevel=3
foldminlines=1
foldnestmax=20

I have uninstalled all my plugins excluding YouCompleteMe.
In this case, to avoid issues, I used zR to reopen all folds before appending. I still encountered the same issues. However, it should be noted that when I use zx to recompute the folds in the file, the file folding is fixed and has no issues.

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vecin2 avatar vecin2 commented on July 4, 2024

I've encountered the same issue. Thanks for the zx workaround!
This is my output of running the above:

  foldexpr=SimpylFold#FoldExpr(v:lnum)
  foldlevel=0
  foldminlines=1
  foldnestmax=20

I removed all my config and left only this plugin then I was able to replicate with a file like the following:

def some_fuction(var):
    var = 1 + 2

Then I added and an extra line:

def some_fuction(var):
    var = 1 + 2
    var2 =2 

Then press <Esc> to go back to normal mode and then zm and this is what I got:

+--  2 lines: def some_fuction(var):------------------------
    var2 = 2

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yongrenjie avatar yongrenjie commented on July 4, 2024

Hi all -
I suspect this has something to do with the caching of the folds. I have a similar issue whereby if I add lines before a fold, all subsequent folds get messed up badly upon saving. This technically sounds closer to #112 but since the video there is no longer accessible I'm not sure if the behaviour is the same.

With git bisect I find that the behaviour was introduced in commit 2dfeb35.

zx alone does not work for me, unfortunately. I find that I need to regenerate the cache, so the following autocmd (which I placed in ~/.vim/after/ftplugin/python.vim) solves my issue:

function UpdateFolds()
    call SimpylFold#Recache()
    FastFoldUpdate!
endfunction
autocmd BufWritePre <buffer> call UpdateFolds()

There is probably a tiny bit of lag especially with large files, but since it's only triggered upon saving (which takes a while anyway), it's quite difficult to notice. On a 1200-line file it takes me 100–200 ms to recalculate the folds and write the buffer. One could probably use normal zx in place of FastFoldUpdate! if FastFold isn't installed.

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