Add ability to show floating treesitter context using indentscope

[maskudo]

Contributing guidelines

• I have read CONTRIBUTING.md
• I have read CODE_OF_CONDUCT.md

Module(s)

mini.indentscope

Description

It is easy to lose track of what function you are on in long functions. By leveraging the get_scope function, I was able to show the current scope in a floating line like nvim_treesitter_context with a few lines of code.
With a few tweaks, it could be a useful addition to the indentscope module or an extra.

    vim.api.nvim_create_autocmd({ "CursorHold" }, {
      callback = function()
        local top = MiniIndentscope.get_scope().body.top
        local lines = { vim.fn.getline(top) }
        local float_buf = vim.api.nvim_create_buf(false, true)
        local win_width = vim.api.nvim_win_get_width(0)
        vim.api.nvim_buf_set_lines(float_buf, 0, -1, false, lines)
        local opts = {
          relative = "editor", -- Fixed to top of editor
          width = win_width, -- Full width of window
          height = #lines,
          col = 0, -- Start from left edge
          row = 0, -- Sticky at the top
          anchor = "NW",
          style = "minimal",
          border = "none",
        }

        vim.api.nvim_open_win(float_buf, false, opts)
      end,
      desc = "Show Scope",
    })

[echasnovski]

Thanks for sharing! I converted this into "Show and tell" discussion as this functionality is definitely out of scope for 'mini.indentscope'. But something similar yet more general can be a topic of one of the future planned modules.

---

The code has one major issue: it creates new buffer and floating window on every CursorHold... which is very frequently :) My suggestion would be to cache both buffer and window and reuse them inside CursorHold autocommand. The robust way of doing so is not quite straightforward:

• Make sure that buffer can be re-created after :%bwipeout and window can be re-created after <C-w>o.
• Make sure window reacts to possible resize of the underlying "normal" window.

Or another suggestion is to use 'winbar' option in a similar fashion to set scope's top line, just without floating window.

[maskudo]

Ohh thank you very much for the input. will definitely be looking into those