feat: add tabline support (#92)

README.md

@@ -274,6 +274,33 @@ lualine.sections.lualine_b = {
 
 </details>
 
+### Using tabline as statusline
+You can use lualine to display components in tabline . 
+The sections, configurations and highlights are same as statusline.
+
+```
+lualine.tabline = {
+  lualine_a = { },
+  lualine_b = { 'branch' },
+  lualine_c = { 'filename' },
+  lualine_x = { },
+  lualine_y = { },
+  lualine_z = { },
+}
+```
+This will show branch and filename component in top of neovim inside tabline .
+
+
+You can also completely move your statuline to tabline by configuring lualine.tabline
+instead of lualine.sections & lualine.inactive_sections and setting them to empty
+```
+lualine.tabline = {
+......
+  }
+lualine.sections = {}
+lualine.inactive_sections = {}
+```
+
 ### Loading plugin extensions
 Lualine extensions change statusline appearance for a window/buffer with a plugin loaded e.g. [junegunn/fzf.vim](https://github.com/junegunn/fzf.vim)
 

doc/lualine.txt

@@ -37,10 +37,11 @@ CONTENTS                                                     *lualine_contents*
         1.3.4. Changing components.................|lualine_changing_components|
         1.3.5. Building Custom components............|lualine_custom_components|
         1.3.6. Custom options...........................|lualine_custom_options|
-        1.3.7. Loading plugin extensions.....|lualine_loading_plugin_extensions|
-        1.3.8  Config examples.........................|lualine_config_examples|
-            1.3.8.1. Packer.nvim......|lualine_config_example_using_packer.nvim|
-            1.3.8.2 VIML example.......|lualine_full_config_example_inside_viml|
+        1.3.7. Using tabline as statusline...............|lualine_using_tabline|
+        1.3.8. Loading plugin extensions.....|lualine_loading_plugin_extensions|
+        1.3.9  Config examples.........................|lualine_config_examples|
+            1.3.9.1. Packer.nvim......|lualine_config_example_using_packer.nvim|
+            1.3.9.2 VIML example.......|lualine_full_config_example_inside_viml|
     1.4. Contributing.....................................|lualine_contributing|
     1.5. Screenshots.......................................|lualine_screenshots|
 
@@ -376,7 +377,34 @@ Example:~
       end
     }
   }
+-------------------------------------------------------------------------------
+USING TABLINE AS STATUSLINE                              *lualine_using_tabline*
+
+You can use lualine to display components in tabline .
+The sections, configurations and highlights are same as statusline.
+
+>
+    lualine.tabline = {
+      lualine_a = { },
+      lualine_b = { 'branch' },
+      lualine_c = { 'filename' },
+      lualine_x = { },
+      lualine_y = { },
+      lualine_z = { },
+    }
 <
+This will show branch and filename component in top of neovim inside tabline .
+
+You can also completely move your statuline to tabline by configuring lualine.tabline
+instead of lualine.sections & lualine.inactive_sections and setting them to empty
+>
+    lualine.tabline = {
+    ......
+      }
+    lualine.sections = {}
+    lualine.inactive_sections = {}
+<
+
 
 --------------------------------------------------------------------------------
 LOADING PLUGIN EXTENSIONS                    *lualine_loading_plugin_extensions*

doc/tags

@@ -19,4 +19,5 @@ lualine_screenshots	lualine.txt	/*lualine_screenshots*
 lualine_setting_theme	lualine.txt	/*lualine_setting_theme*
 lualine_starting_lualine	lualine.txt	/*lualine_starting_lualine*
 lualine_usage_and_customization	lualine.txt	/*lualine_usage_and_customization*
+lualine_using_tabline	lualine.txt	/*lualine_using_tabline*
 lualine_vim-plug	lualine.txt	/*lualine_vim-plug*

lua/lualine.lua

@@ -35,6 +35,8 @@ M.inactive_sections = {
   lualine_z = {  }
 }
 
+M.tabline = {}
+
 M.extensions = { }
 
 local function apply_configuration(config_table)
@@ -59,6 +61,7 @@ local function apply_configuration(config_table)
   parse_sections('options')
   parse_sections('sections')
   parse_sections('inactive_sections')
+  parse_sections('tabline')
   if config_table.extensions then M.extensions = config_table.extensions end
 end
 
@@ -168,6 +171,7 @@ local function load_components()
   end
   load_sections(M.sections)
   load_sections(M.inactive_sections)
+  load_sections(M.tabline)
 end
 
 local function  load_extensions()
@@ -283,27 +287,49 @@ local function status_dispatch()
   end
 end
 
-local function exec_autocommands()
+local function tabline()
+  return statusline(M.tabline, true)
+end
+
+local function setup_theme()
+  lualine_set_theme()
   _G.lualine_set_theme = lualine_set_theme
-  _G.lualine_statusline = status_dispatch
   vim.api.nvim_exec([[
   augroup lualine
   autocmd!
   autocmd ColorScheme * call v:lua.lualine_set_theme()
-  autocmd WinLeave,BufLeave * lua vim.wo.statusline=lualine_statusline()
-  autocmd WinEnter,BufEnter * setlocal statusline=%!v:lua.lualine_statusline()
   augroup END
   ]], false)
 end
 
+local function set_tabline()
+  if next(M.tabline) ~= nil then
+    _G.lualine_tabline = tabline
+    vim.o.tabline = '%!v:lua.lualine_tabline()'
+    vim.o.showtabline = 2
+  end
+end
+
+local function set_statusline()
+  if next(M.sections) ~= nil or next(M.inactive_sections) ~= nil then
+    _G.lualine_statusline = status_dispatch
+    vim.o.statusline = '%!v:lua.lualine_statusline()'
+    vim.api.nvim_exec([[
+    autocmd lualine WinLeave,BufLeave * lua vim.wo.statusline=lualine_statusline()
+    autocmd lualine WinEnter,BufEnter * setlocal statusline=%!v:lua.lualine_statusline()
+    ]], false)
+  end
+end
+
 function M.status(config)
   apply_configuration(vim.g.lualine)
   apply_configuration(config)
   check_single_separator()
-  lualine_set_theme()
-  exec_autocommands()
+  setup_theme()
   load_components()
   load_extensions()
+  set_statusline()
+  set_tabline()
 end
 
 return M