feat: add support for function in max_length option (tabs & buffers)

README.md

@@ -413,6 +413,7 @@ sections = {
       show_filename_only = true, -- shows shortened relative path when false
       show_modified_status = true -- shows indicator then bufder is modified
       max_length = vim.o.columns * 2 / 3, -- maximum width of buffers component
+                                          -- can also be a function that returns value of max_length dynamicaly 
       filetype_names = {
         TelescopePrompt = 'Telescope',
         dashboard = 'Dashboard',
@@ -538,6 +539,7 @@ sections = {
     {
       'tabs',
       max_length = vim.o.columns / 3, -- maximum width of tabs component
+                                      -- can also be a function that returns value of max_length dynamicaly 
       mode = 0, -- 0  shows tab_nr
                 -- 1  shows tab_name
                 -- 2  shows tab_nr + tab_name

lua/lualine/components/buffers/init.lua

@@ -93,6 +93,10 @@ function M:update_status()
   end
 
   local max_length = self.options.max_length
+  if type(max_length) == 'function' then
+    max_length = max_length(self)
+  end
+  
   if max_length == 0 then
     max_length = math.floor(2 * vim.o.columns / 3)
   end

lua/lualine/components/tabs/init.lua

@@ -76,6 +76,10 @@ function M:update_status()
   end
 
   local max_length = self.options.max_length
+  if type(max_length) == 'function' then
+    max_length = max_length(self)
+  end
+  
   if max_length == 0 then
     max_length = math.floor(vim.o.columns / 3)
   end