a lot more stuff

lua/conf/opts.lua

@@ -1,3 +1,6 @@
+local misc = require('core.misc')
+local auto = misc.auto
+
 -- color stuff
 if vim.fn.has("termguicolors") then
   vim.opt.termguicolors = true
@@ -5,6 +8,10 @@ end
 
 vim.opt.laststatus = 3
 
+-- numbers
+vim.opt.number = true
+vim.opt.relativenumber = true
+
 -- buffer
 vim.opt.scrolloff = 5
 vim.opt.wrap = true -- wraping lines
@@ -21,7 +28,12 @@ vim.opt.tabstop = tabwidth
 vim.opt.shiftwidth = tabwidth
 vim.opt.softtabstop = tabwidth
 
-vim.opt.clipboard = 'unnamedplus' -- system clipboard
+-- Schedule the setting after `UiEnter` because it can increase startup-time.
+-- (yoinked from kickstart.nvim)
+vim.schedule(function()
+  vim.opt.clipboard = 'unnamedplus' -- system clipboard
+end)
+
 vim.opt.updatetime = 200
 
 -- file saving
@@ -50,3 +62,71 @@ vim.g.netrw_winsize = 30
 vim.g.netrw_liststyle = 1
 vim.g.netrw_sizestyle = "H"
 vim.g.netrw_hide = 1
+
+-- folding
+auto("FileType", {
+  callback = function()
+    -- support lsp folding
+    if vim.fn.has("nvim-0.11") then
+      auto('LspAttach', {
+        callback = function(args)
+          local client = vim.lsp.get_client_by_id(args.data.client_id)
+          if not client then
+            return
+          end
+
+          if client:supports_method('textDocument/foldingRange') then
+            local win = vim.api.nvim_get_current_win()
+            vim.wo[win][0].foldmethod = "expr"
+            vim.wo[win][0].foldexpr = 'v:lua.vim.lsp.foldexpr()'
+          end
+        end,
+      })
+    end
+
+    -- or just rely on treesitter
+    if require("nvim-treesitter.parsers").has_parser() then
+      vim.opt.foldmethod = "expr"
+      vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
+    else
+      vim.opt.foldmethod = "syntax"
+    end
+  end
+})
+
+-- lsp folding: vim.o.foldexpr = "v:lua.vim.lsp.foldexpr()"
+-- waiting on https://github.com/neovim/neovim/pull/31311 to hit a release
+require('core.lsp.functions').add_capabilities({
+  textDocument = {
+    foldingRange = {
+      dynamicRegistration = false,
+      lineFoldingOnly = true
+    }
+  }
+})
+
+vim.opt.foldlevelstart = 99
+vim.opt.foldlevel = 99
+vim.opt.foldenable = true
+vim.o.fillchars = 'fold: '
+
+_G.Fold_text = require('core.folding')
+vim.opt.foldtext = 'v:lua.Fold_text()'
+
+-- statusline
+function _G.Status()
+  return table.concat {
+    "%t", -- file name
+    " %h", -- help buffer tag
+    "%m", -- modify tag
+    "%r", -- readonly flag
+    "%=", -- seperate left and right side
+
+    -- print out the number of lsp clients attached
+    "λ"..#vim.lsp.get_clients({ bufnr = 0 }).." ",
+
+    "%l,%c%V", -- line, column-virtual column
+    "    %P" -- percentage through display window
+  }
+end
+vim.o.statusline="%!v:lua.Status()"