fix: left sections taking over entire stl when xyz is absent

- now %= applied even when x,y,z is absent
- newly added always_divide_middle option cal be set to false to avood %=

README.md

@@ -131,6 +131,7 @@ require'lualine'.setup {
     component_separators = { left = '', right = ''},
     section_separators = { left = '', right = ''},
     disabled_filetypes = {}
+    always_divide_middle = true,
   },
   sections = {
     lualine_a = {'mode'},
@@ -349,6 +350,9 @@ options = {
   component_separators = {left = '', right = ''},
   section_separators = {left = '', right = ''},
   disabled_filetypes = {},  -- filetypes to diable lualine on
+  always_divide_middle = true, -- When true left_sections (a,b,c) can't
+                               -- take over entiee statusline even
+                               -- when none of section x, y, z is present.
 }
 ```
 

doc/lualine.txt

@@ -106,6 +106,7 @@ Default config
         component_separators = { left = '', right = ''},
         section_separators = { left = '', right = ''},
         disabled_filetypes = {}
+        always_divide_middle = true,
       },
       sections = {
         lualine_a = {'mode'},
@@ -332,6 +333,9 @@ in component.
       component_separators = {left = '', right = ''},
       section_separators = {left = '', right = ''},
       disabled_filetypes = {},  -- filetypes to diable lualine on
+      always_divide_middle = true, -- When true left_sections (a,b,c) can't
+                                   -- take over entiee statusline even
+                                   -- when none of section x, y, z is present.
     }
 <
 

lua/lualine.lua

@@ -126,7 +126,7 @@ local function statusline(sections, is_focused)
   -- The sequence sections should maintain [SECTION_SEQUENCE]
   local section_sequence = { 'a', 'b', 'c', 'x', 'y', 'z' }
   local status = {}
-  local applied_midsection_devider = false
+  local applied_midsection_divider = false
   local applied_trunc = false
   for _, section_name in ipairs(section_sequence) do
     if sections['lualine_' .. section_name] then
@@ -137,8 +137,8 @@ local function statusline(sections, is_focused)
         is_focused
       )
       if #section_data > 0 then
-        if not applied_midsection_devider and section_name > 'c' then
-          applied_midsection_devider = true
+        if not applied_midsection_divider and section_name > 'c' then
+          applied_midsection_divider = true
           section_data = modules.highlight.format_highlight 'lualine_c' .. '%=' .. section_data
         end
         if not applied_trunc and section_name > 'b' then
@@ -149,6 +149,10 @@ local function statusline(sections, is_focused)
       end
     end
   end
+  if applied_midsection_divider == false and config.options.always_divide_middle ~= false then
+    -- When non of section x,y,z is present
+    table.insert(status, modules.highlight.format_highlight 'lualine_c' .. '%=')
+  end
   return apply_transitional_separators(table.concat(status))
 end
 

lua/lualine/config.lua

@@ -7,6 +7,7 @@ local config = {
     component_separators = { left = '', right = '' },
     section_separators = { left = '', right = '' },
     disabled_filetypes = {},
+    always_divide_middle = true,
   },
   sections = {
     lualine_a = { 'mode' },