plugin: Add extension for vimodoro plugin (#2652)

* Adds integration with vimodoro information.

---------
Co-authored-by: Rowan <rowan.douglas@vimabc.xyz>
Co-authored-by: Eddy <eddy_c@novellpharm.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

autoload/airline/extensions.vim

@@ -229,6 +229,11 @@ function! airline#extensions#load()
     call add(s:loaded_ext, 'undotree')
   endif
 
+  if exists(':RTM')
+    call airline#extensions#vimodoro#init(s:ext)
+    call add(s:loaded_ext, 'vimodoro')
+  endif
+
   if get(g:, 'airline#extensions#hunks#enabled', 1)
         \ && (exists('g:loaded_signify')
         \ || exists('g:loaded_gitgutter')

autoload/airline/extensions/vimodoro.vim

@@ -0,0 +1,25 @@
+" MIT License. Copyright (c) 2013-2021 Bailey Ling et al.
+" Plugin: https://github.com/VimfanTPdvorak/vimodoro.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !exists(':RTM')
+  finish
+endif
+
+function! airline#extensions#vimodoro#apply(...)
+  if exists('t:vimodoro')
+    if &ft == 'vimodoro'
+        if exists(':PomodoroStatus')
+          call airline#extensions#apply_left_override('vimodoro', '%{PomodoroStatus(1)}')
+        else
+          call airline#extensions#apply_left_override('vimodoro', g:airline_section_y)
+        endif
+    endif
+  endif
+endfunction
+
+function! airline#extensions#vimodoro#init(ext)
+  call a:ext.add_statusline_func('airline#extensions#vimodoro#apply')
+endfunction