feat(nvim): new nvim config (#28)

* feat(nvim): clean config, work in progress
* feat: refactored plugins and configs
* feat: stylua config, ufo, lsp refactor, cleanup
* feat: renamed nvim to nvim-lazy, added alias
* feat: renamed nvim-clean to be nvim, updated alias

config/nvim/lua/plugins/ufo.lua

@@ -0,0 +1,84 @@
+local handler = function(virtText, lnum, endLnum, width, truncate)
+  local newVirtText = {}
+  local suffix = (' 󰁂 %d '):format(endLnum - lnum)
+  local sufWidth = vim.fn.strdisplaywidth(suffix)
+  local targetWidth = width - sufWidth
+  local curWidth = 0
+  for _, chunk in ipairs(virtText) do
+    local chunkText = chunk[1]
+    local chunkWidth = vim.fn.strdisplaywidth(chunkText)
+    if targetWidth > curWidth + chunkWidth then
+      table.insert(newVirtText, chunk)
+    else
+      chunkText = truncate(chunkText, targetWidth - curWidth)
+      local hlGroup = chunk[2]
+      table.insert(newVirtText, { chunkText, hlGroup })
+      chunkWidth = vim.fn.strdisplaywidth(chunkText)
+      -- str width returned from truncate() may less than 2nd argument, need padding
+      if curWidth + chunkWidth < targetWidth then
+        suffix = suffix .. (' '):rep(targetWidth - curWidth - chunkWidth)
+      end
+      break
+    end
+    curWidth = curWidth + chunkWidth
+  end
+  table.insert(newVirtText, { suffix, 'MoreMsg' })
+  return newVirtText
+end
+
+return {
+  -- Not UFO in the sky, but an ultra fold in Neovim.
+  -- https://github.com/kevinhwang91/nvim-ufo/
+  {
+    'kevinhwang91/nvim-ufo',
+    lazy = false,
+    enabled = true,
+    version = '*',
+    dependencies = {
+      'kevinhwang91/promise-async',
+      { 'nvim-treesitter/nvim-treesitter', run = ':TSUpdate' },
+      {
+        'luukvbaal/statuscol.nvim',
+        config = function()
+          local builtin = require 'statuscol.builtin'
+          require('statuscol').setup {
+            relculright = true,
+            segments = {
+              { text = { builtin.foldfunc }, click = 'v:lua.ScFa' },
+              { text = { '%s' }, click = 'v:lua.ScSa' },
+              { text = { builtin.lnumfunc, ' ' }, click = 'v:lua.ScLa' },
+            },
+          }
+        end,
+      },
+    },
+    init = function()
+      vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
+      vim.o.foldcolumn = '1' -- '0' is not bad
+      vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
+      vim.o.foldlevelstart = 99
+      vim.o.foldenable = true
+    end,
+    opts = {
+      open_fold_hl_timeout = 150,
+      close_fold_kinds_for_ft = { 'imports', 'comment' },
+      preview = {
+        win_config = {
+          border = { '', '─', '', '', '', '─', '', '' },
+          winhighlight = 'Normal:Folded',
+          winblend = 0,
+        },
+        mappings = {
+          scrollU = '<C-u>',
+          scrollD = '<C-d>',
+          jumpTop = '[',
+          jumpBot = ']',
+        },
+      },
+      provider_selector = function(_, _, _) -- bufnr, filetype, buftype
+        return { 'treesitter', 'indent' }
+      end,
+      fold_virt_text_handler = handler,
+    },
+  },
+}