Maintain current selection after leaving quickfix window

[tfgast]

Excellent plugin!
One small annoyance I've noticed is that when I leave the quickfix window, it no longer maintains the current selection and the top item is selected instead.

[onsails]

Good idea! I'll take a look into it.

[jfly]

(Sorry for the necrobump) This still seems to be happening. @onsails, did you ever figure this out?

[jfly]

I dug into this, and this does't really seem to be diaglist.nvim's fault. It's just the way that Neovim behaves when you update the quickfix list (which diaglist.nvim does a lot of, not just when selecting an item int he quickfix list).

I think we could rework diaglist.nvim to refresh the quickfix list less often (for example, there's not really a good reason to refresh the list when selecting an item, it's not possible for the diagnostics to change when you do that), but the general issue remains: at some point, you're going to address a diagnostics, and then you're going to lose your position in the quickfix list.

I wrote this plugin to that tries to preserve your location updates in the quickfix list: https://github.com/jfly/sticky-quickfix.nvim. It's probably not perfect.

I also filed neovim/neovim#30724 with Neovim core to see if they'd be willing to change the behavior here, or perhaps make it possible to write a more correct plugin than the monkeypatching hack I had to do.

[jfly]

Some updates here:

• I upstreamed the core logic to Vim in feature: add new 'u' ("update") action for setqflist/setloclist vim/vim#15841
• That landed in Neovim in vim-patch:9.1.0785: cannot preserve error position when setting quickfix list neovim/neovim#30820
• I've made a followup change to Neovim to make even easier to use here vim.diagnostic.setqflist improvements neovim/neovim#30868