Feat: Add condition option

README.md

@@ -200,6 +200,7 @@ right_padding | 1 | Adds padding to the right of components | all
 upper | false | Changes components to be uppercase | all
 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
 ##### Global options example
 ```lua
 options = {icons_enabled = true}

doc/lualine.txt

@@ -263,7 +263,12 @@ option       (default_value)
   • icon          (differs for each component)
     displays an icon infront of a component
 
-  • color         (nil)
+  • 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.
+
+  • color         (Theme colors)
     color option can be used to set custom color to a component
     Color format:
     `lua color = {fg = '#rrggbb', bg= '#rrggbb', gui='style'}`

lua/lualine/component.lua

@@ -118,6 +118,9 @@ local Component = {
   -- Driver code of the class
   draw = function(self, default_highlight)
     self.status = ''
+    if self.options.condition ~= nil and self.options.condition() ~= true then 
+      return self.status
+    end
     local status = self:update_status()
     if self.options.format then status = self.options.format(status or '') end
     if type(status) == 'string' and #status > 0 then