nvim: lsp/statusline: Add support for LSP progress

Use the same timer loop for updating LSP progress in status line
which we use for updating git ahead, behind status.

nvim/.config/nvim/after/plugin/statusline.lua

@@ -1,8 +1,10 @@
 local fn  = vim.fn
 local api = vim.api
 
-local gstatus = { ahead = 0, behind = 0 }
-local update_gstatus = function()
+local lsp_status = ""
+local gstatus    = { ahead = 0, behind = 0 }
+
+local update_status = function()
   local Job = require 'plenary.job'
   Job:new({
     command = 'git',
@@ -20,16 +22,19 @@ local update_gstatus = function()
       gstatus = { ahead = ahead, behind = behind }
     end,
   }):start()
+
+  if vim.lsp.status then
+    lsp_status = vim.lsp.status()
+  end
 end
 
 if _G.Gstatus_timer == nil then
   _G.Gstatus_timer = vim.uv.new_timer()
+  _G.Gstatus_timer:start(0, 1000, vim.schedule_wrap(update_status))
 else
   _G.Gstatus_timer:stop()
 end
 
-_G.Gstatus_timer:start(0, 2000, vim.schedule_wrap(update_gstatus))
-
 local M = {}
 
 local colors = {
@@ -70,10 +75,12 @@ highlight("DiagnosticsH", colors.orange , colors.bg)
 highlight("Location"    , colors.yellow , colors.bg)
 highlight("Progress"    , colors.magenta, colors.bg)
 highlight("WinbarFile"  , colors.magenta, colors.bg)
+highlight("LspProgress" , colors.orange , colors.bg)
 
 M.trunc_width = setmetatable({
-  git_status = 60,
   filename   = 140,
+  git_status = 60,
+  lsp_status = 80,
 }, {
   __index = function()
     return 80
@@ -204,12 +211,26 @@ M.git_ahead_behind_status = function()
     or ""
 end
 
+M.get_lsp_status = function(self)
+  local trunc_width = self.trunc_width.lsp_status
+  if self:is_truncated(trunc_width) then
+    return ""
+  end
+
+  if vim.lsp.status then
+    return string.format(" %s%s", '%#LspProgress#', string.sub(lsp_status, 1, trunc_width))
+  end
+
+  return ""
+end
+
 M.set_active = function(self)
   return table.concat {
     self:get_filename(),
     self:get_git_status(),
     self:git_ahead_behind_status(),
     "%=",
+    self:get_lsp_status(),
     self:diagnostic_status(),
     self:get_line_col(),
     self:progress(),

nvim/.config/nvim/lua/lsp.lua

@@ -233,3 +233,8 @@ vim.api.nvim_create_autocmd("LspDetach", {
     client_custom_cleanup(client)
   end,
 })
+
+vim.api.nvim_create_autocmd("LspProgress", {
+  group   = lsp_augroup_id,
+  command = "redrawstatus"
+})