Feat: Disable lualine om specific buffer (#206)

Adding a new option in options table named `disabled_filetypes` .
It's a list of filetypes . If current filetyoe is on the list
statusline will be disabled.

README.md

@@ -252,6 +252,7 @@ lower | false | Changes components to be lowercase | All
 format | nil | Takes a function . The funtion gets the result of component as argument and it's return value is displayed. So this function can parse and format the output as user wants. | All
 condition | nil | Takes a function. The component is loaded if the function returns true otherwise not. It can be used to load some comoonents on specific cases. | All
 color | nil | Sets custom color for the component in this format<br></br>`color = {fg = '#rrggbb', bg= '#rrggbb', gui='style'}`<br></br>The fields of color table are optional and default to theme <br></br>Color option can also be a string containing highlight group name `color = "WarningMsg"`. One neat trick set the color to highlight group name then change that highlight with :hi command to change color of that component at runtime. | All
+disabled_filetypes | {} | Disables lualine for specific filetypes | It works on entire statusline instead of on a single component
 
 #### Using global options
 Global options can be set in two ways. One is as part of options table in setup.
@@ -404,6 +405,7 @@ extensions = { 'fzf' }
           theme = 'gruvbox',
           section_separators = {'', ''},
           component_separators = {'', ''},
+          disabled_filetypes = {},
           icons_enabled = true,
         },
         sections = {
@@ -441,6 +443,7 @@ let g:lualine = {
     \  'theme' : 'gruvbox',
     \  'section_separators' : ['', ''],
     \  'component_separators' : ['', ''],
+    \  'disabled_filetypes' : [],
     \  'icons_enabled' : v:true,
     \},
     \'sections' : {

doc/lualine.txt

@@ -295,6 +295,10 @@ option       (default_value)
     can parse and format the output as user wants.
     Supported components: all
 
+  • disabled_filetypes   ({})
+    Disables lualine for specific filetypes. It works on entire 
+    statusline instead of on a single component.
+
   Example:
     `lualine.options.icons_enabled = true`
 
@@ -522,6 +526,7 @@ Lua config example
           theme = 'gruvbox',
           section_separators = {'', ''},
           component_separators = {'', ''},
+          disabled_filetypes = {},
           icons_enabled = true,
         },
         sections = {
@@ -553,6 +558,7 @@ Vimscript config example
         \  'theme' : 'gruvbox',
         \  'section_separators' : ['', ''],
         \  'component_separators' : ['', ''],
+        \  'disabled_filetypes' : [],
         \  'icons_enabled' : v:true,
         \},
         \'sections' : {

lua/lualine/defaults.lua

@@ -4,7 +4,8 @@ M.options = {
   icons_enabled = true,
   theme = 'gruvbox',
   component_separators = {'', ''},
-  section_separators = {'', ''}
+  section_separators = {'', ''},
+  disabled_filetypes = {},
 }
 
 M.sections = {

lua/lualine/init.lua

@@ -65,7 +65,8 @@ end
 
 local function component_loader(component)
   if type(component[1]) == 'function' then
-    return require 'lualine.components.special.function_component':new(component)
+    return
+        require 'lualine.components.special.function_component':new(component)
   end
   if type(component[1]) == 'string' then
     -- load the component
@@ -158,7 +159,8 @@ local function statusline(sections, is_focused)
       local current_section = status_builder[i]
       local next_section = status_builder[i + 1] or {}
       -- For 2nd half we need to show separator before section
-      if current_section.name > 'x' and config.options.section_separators[2] ~= '' then
+      if current_section.name > 'x' and config.options.section_separators[2] ~=
+          '' then
         local transitional_highlight = highlight.get_transitional_highlights(
                                            previous_section.data,
                                            current_section.data, true)
@@ -173,7 +175,8 @@ local function statusline(sections, is_focused)
       table.insert(status, status_builder[i].data)
 
       -- For 1st half we need to show separator after section
-      if current_section.name < 'c' and config.options.section_separators[1] ~= ''  then
+      if current_section.name < 'c' and config.options.section_separators[1] ~=
+          '' then
         local transitional_highlight = highlight.get_transitional_highlights(
                                            current_section.data,
                                            next_section.data)
@@ -211,6 +214,15 @@ local function get_extension_sections()
 end
 
 local function status_dispatch()
+  -- disable on specific filetypes
+  local current_ft = vim.api.nvim_buf_get_option(
+                         vim.fn.winbufnr(vim.g.statusline_winid), 'filetype')
+  for _, ft in pairs(config.options.disabled_filetypes) do
+    if ft == current_ft then
+      vim.wo.statusline = ''
+      return ''
+    end
+  end
   local extension_sections = get_extension_sections()
   if vim.g.statusline_winid == vim.fn.win_getid() then
     local sections = extension_sections.sections
@@ -273,9 +285,7 @@ local function set_statusline()
 end
 
 local function setup(user_config)
-  if not user_config then
+  if not user_config then apply_configuration(vim.g.lualine) end
-    apply_configuration(vim.g.lualine)
-  end
   apply_configuration(user_config)
   check_single_separator()
   setup_theme()