Revert "Performence improvments (#205)" (#212)

This reverts commit 141417de61.

lua/lualine/highlight.lua

@@ -1,10 +1,11 @@
 -- Copyright (c) 2020-2021 hoob3rt
 -- MIT license, see LICENSE for more details.
 local M = {}
-local cterm_colors
+local utils_colors = require 'lualine.utils.cterm_colors'
 local utils = require 'lualine.utils.utils'
 local section_highlight_map = {x = 'c', y = 'b', z = 'a'}
 local active_theme = nil
+local cterm_colors = false
 
 function M.highlight(name, foreground, background, gui, reload)
   local command = {'highlight', name}
@@ -12,14 +13,14 @@ function M.highlight(name, foreground, background, gui, reload)
     table.insert(command, 'guifg=' .. foreground)
     if cterm_colors then
       table.insert(command,
-                   'ctermfg=' .. cterm_colors.get_cterm_color(foreground))
+                   'ctermfg=' .. utils_colors.get_cterm_color(foreground))
     end
   end
   if background and background ~= 'none' then
     table.insert(command, 'guibg=' .. background)
     if cterm_colors then
       table.insert(command,
-                   'ctermbg=' .. cterm_colors.get_cterm_color(background))
+                   'ctermbg=' .. utils_colors.get_cterm_color(background))
     end
   end
   if gui then
@@ -35,9 +36,7 @@ end
 function M.create_highlight_groups(theme)
   utils.clear_highlights()
   active_theme = theme
-  if not vim.o.termguicolors then
-    cterm_colors = require 'lualine.utils.cterm_colors'
-  end
+  cterm_colors = not vim.o.termguicolors
   for mode, sections in pairs(theme) do
     for section, colorscheme in pairs(sections) do
       local highlight_group_name = {'lualine', section, mode}

lua/lualine/init.lua

@@ -5,6 +5,7 @@ local highlight = require('lualine.highlight')
 local config = {}
 
 local function apply_configuration(config_table)
+  if not config_table then return end
   local function parse_sections(section_group_name)
     if not config_table[section_group_name] then return end
     for section_name, section in pairs(config_table[section_group_name]) do
@@ -80,23 +81,18 @@ local function component_loader(component)
 end
 
 local function load_sections(sections)
-  local async_loader
-  async_loader = vim.loop.new_async(vim.schedule_wrap(function()
-    for section_name, section in pairs(sections) do
-      for index, component in pairs(section) do
-        if type(component) == 'string' or type(component) == 'function' then
-          component = {component}
-        end
-        component.self = {}
-        component.self.section = section_name
-        -- apply default args
-        component = vim.tbl_extend('keep', component, config.options)
-        section[index] = component_loader(component)
+  for section_name, section in pairs(sections) do
+    for index, component in pairs(section) do
+      if type(component) == 'string' or type(component) == 'function' then
+        component = {component}
       end
+      component.self = {}
+      component.self.section = section_name
+      -- apply default args
+      component = vim.tbl_extend('keep', component, config.options)
+      section[index] = component_loader(component)
     end
-    async_loader:close()
-  end))
-  async_loader:send()
+  end
 end
 
 local function load_components()
@@ -238,36 +234,31 @@ end
 local function tabline() return statusline(config.tabline, true) end
 
 local function setup_theme()
-  local async_loader
-  async_loader = vim.loop.new_async(vim.schedule_wrap(function()
-    local function get_theme_from_config()
-      local theme_name = config.options.theme
-      if type(theme_name) == 'string' then
-        local ok, theme = pcall(require, 'lualine.themes.' .. theme_name)
-        if ok then return theme end
-      elseif type(theme_name) == 'table' then
-        -- use the provided theme as-is
-        return config.options.theme
-      end
-      vim.api.nvim_echo({
-        {
-          'theme ' .. tostring(theme_name) .. ' not found, defaulting to gruvbox',
-          'ErrorMsg'
-        }
-      }, true, {})
-      return require 'lualine.themes.gruvbox'
+  local function get_theme_from_config()
+    local theme_name = config.options.theme
+    if type(theme_name) == 'string' then
+      local ok, theme = pcall(require, 'lualine.themes.' .. theme_name)
+      if ok then return theme end
+    elseif type(theme_name) == 'table' then
+      -- use the provided theme as-is
+      return config.options.theme
     end
-    local theme = get_theme_from_config()
-    highlight.create_highlight_groups(theme)
-    vim.api.nvim_exec([[
-    augroup lualine
-    autocmd!
-    autocmd ColorScheme * lua require'lualine.utils.utils'.reload_highlights()
-    augroup END
-    ]], false)
-    async_loader:close()
-  end))
-  async_loader:send()
+    vim.api.nvim_echo({
+      {
+        'theme ' .. tostring(theme_name) .. ' not found, defaulting to gruvbox',
+        'ErrorMsg'
+      }
+    }, true, {})
+    return require 'lualine.themes.gruvbox'
+  end
+  local theme = get_theme_from_config()
+  highlight.create_highlight_groups(theme)
+  vim.api.nvim_exec([[
+  augroup lualine
+  autocmd!
+  autocmd ColorScheme * lua require'lualine.utils.utils'.reload_highlights()
+  augroup END
+  ]], false)
 end
 
 local function set_tabline()
@@ -281,10 +272,8 @@ local function set_statusline()
   if next(config.sections) ~= nil or next(config.inactive_sections) ~= nil then
     vim.o.statusline = '%!v:lua.require\'lualine\'.statusline()'
     vim.api.nvim_exec([[
-  augroup lualine
-    autocmd WinLeave,BufLeave * lua vim.wo.statusline=require'lualine'.statusline()
-    autocmd WinEnter,BufEnter * set statusline<
-  augroup END
+    autocmd lualine WinLeave,BufLeave * lua vim.wo.statusline=require'lualine'.statusline()
+    autocmd lualine WinEnter,BufEnter * set statusline<
     ]], false)
   end
 end

lua/lualine/utils/section.lua

@@ -7,9 +7,6 @@ function M.draw_section(section, highlight_name)
   local status = {}
   for _, component in pairs(section) do
     -- load components into status table
-    if type(component) ~= 'table' or (type(component) == 'table' and not component.component_no) then
-      return '' -- unknown element in section. section posibly not yet loaded
-    end
     table.insert(status, component:draw(highlight_name))
   end