[mini.statusline] Flexible statusline components

[RayZ0rr]

I saw the issue in #1713 and decided to implement it because it seems like a really useful feature. Also, the implementation details were specified in the comments so it was easy to implement it after some modifications. See the results here: @Akhil-CM @echasnovski

nvim_miniline.mp4

nvim_miniline_resize.mp4

[echasnovski]

That looks nice! The actual implementation (as a link or an actual code under the spoiler) would be helpful here.

[RayZ0rr]

Yes, I was cleaning up my dotfiles. Will update soon

[RayZ0rr]

@echasnovski
The statusline is here: https://github.com/RayZ0rr/myNeovim/blob/main/nvim/lua/config/plugins/general/statusline/miniline.lua
The helper utils are here: https://github.com/RayZ0rr/myNeovim/blob/main/nvim/lua/config/plugins/general/statusline/utils.lua

Each section can be a table with following fields:

-- @param string: function or array of functions - If function, should return the section string. Array of function can be used to give smaller versions of the string, in which the first one that fits the window width is selected. Eg :- {filename_func, filenameShort_func}
-- @param hl: optional string - The highlight group
-- @param hl_fn: optional function - A function which returns a highlight group, useful dynamic highlight groups like those based on vim mode

[echasnovski]

@echasnovski I want to create flexible diagnostics components, like depending on space only show errors, errors + warnings, errors + warnings + info, etc I also want to show the name of the lsp client attached.

Both of these indeed require custom code and are not possible to achieve out of the box with 'minis.statusline'.

Do you think I can do both without exposing this private lua table ?

Yes, both of this are possible without exposing private H table. All it does for section_lsp and section_diagnostics is efficiently track relevant data (the tracking part is set up via autocommands) so that they don't have to compute that data on every statusline redraw. The performance gain is not huge, but it was somewhat significant at the time those were implemented (off the top of my head, it was something like couple of microseconds while the whole default active content takes around 25-30 microseconds).

So:

• Instead of looking at H.diagnostic_counts table use vim.diagnostic.count(buf_id).
• Instead of looking at H.attached_lsp table use vim.lsp.get_clients(). Beware that there can be multiple LSP servers attached to the same buffer, which was the main reason of why section_lsp only uses + signs to display each attached server (otherwise it might and often would become too wide).

[Akhil-CM]

@Akhil-CM That already exists, right? Like in Diagnostic is that what I was looking for?

I wanted to use the function that @RayZ0rr proposed for the flexible components. For that function we can provide separate functions that show "errors + warnings + info" or "errors + warning" or "errors" depending on width of the statusline

Something like this: vim.lsp.get_active_clients({ bufnr = 0 })[1].name (e.g, example it can be stored in a variable like strings = ..)

Yeah, I saw these functions from mini.statusline but I wanted to squeeze out the extra perf from caching

[Akhil-CM]

Both of these indeed require custom code and are not possible to achieve out of the box with 'minis.statusline'.

I will use the flexible components code that @RayZ0rr provided

So:

* Instead of [looking at `H.diagnostic_counts` table](https://github.com/echasnovski/mini.statusline/blob/e331175f10d9f400b42523b3890841aba202ce16/lua/mini/statusline.lua#L335) use [`vim.diagnostic.count(buf_id)`](https://github.com/echasnovski/mini.statusline/blob/e331175f10d9f400b42523b3890841aba202ce16/lua/mini/statusline.lua#L638).

* Instead of [looking at `H.attached_lsp` table](https://github.com/echasnovski/mini.statusline/blob/e331175f10d9f400b42523b3890841aba202ce16/lua/mini/statusline.lua#L363) use [`vim.lsp.get_clients()`](https://github.com/echasnovski/mini.statusline/blob/e331175f10d9f400b42523b3890841aba202ce16/lua/mini/statusline.lua#L629). Beware that there can be multiple LSP servers attached to the same buffer, which was the main reason of why `section_lsp` only uses `+` signs to display each attached server (otherwise it might and often would become too wide).

Yeah, I saw these functions from mini.statusline but I wanted to squeeze out the extra perf from caching

PS: I would also write the function to show '+' if there's more than 1 lsp else show the name of the server

[RayZ0rr]

@Akhil-CM I am planning to make a fork that exposes the H table as utils. I am also planning to add my flexible function to the module

[RayZ0rr]

Yeah, I saw these functions from mini.statusline but I wanted to squeeze out the extra perf from caching

PS: I would also write the function to show '+' if there's more than 1 lsp else show the name of the server

https://github.com/RayZ0rr/mini.statusline