From 0ad4f97c1a674d5d5e18b2b28c9abd7d5f18e0e3 Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Tue, 22 Aug 2017 15:30:15 +0200
Subject: [PATCH] Add a terminal statusline function for vim

---
 autoload/airline/builder.vim         |  4 +++-
 autoload/airline/extensions.vim      |  5 +++++
 autoload/airline/extensions/term.vim | 32 ++++++++++++++++++++++++++++
 autoload/airline/themes.vim          |  4 ++++
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 autoload/airline/extensions/term.vim

diff --git a/autoload/airline/builder.vim b/autoload/airline/builder.vim
index d87ddfeb..7c74226d 100644
--- a/autoload/airline/builder.vim
+++ b/autoload/airline/builder.vim
@@ -49,7 +49,9 @@ function! s:prototype.build() dict
     let contents = section[1]
     let pgroup = prev_group
     let prev_group = s:get_prev_group(self._sections, i)
-    if group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
+    if group ==# 'airline_c' && &buftype ==# 'terminal' && self._context.active
+      let group = 'airline_term'
+    elseif group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
       let group = 'airline_c'. self._context.bufnr
     elseif prev_group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
       let prev_group = 'airline_c'. self._context.bufnr
diff --git a/autoload/airline/extensions.vim b/autoload/airline/extensions.vim
index 67ec77f2..79f6bec0 100644
--- a/autoload/airline/extensions.vim
+++ b/autoload/airline/extensions.vim
@@ -153,6 +153,11 @@ function! airline#extensions#load()
     call add(loaded_ext, 'netrw')
   endif
 
+  if has("terminal")
+    call airline#extensions#term#init(s:ext)
+    call add(loaded_ext, 'term')
+  endif
+
   if get(g:, 'airline#extensions#ycm#enabled', 0)
     call airline#extensions#ycm#init(s:ext)
     call add(loaded_ext, 'ycm')
diff --git a/autoload/airline/extensions/term.vim b/autoload/airline/extensions/term.vim
new file mode 100644
index 00000000..705b1ef0
--- /dev/null
+++ b/autoload/airline/extensions/term.vim
@@ -0,0 +1,32 @@
+" MIT License. 
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#term#apply(...)
+  if &buftype == 'terminal'
+    let spc = g:airline_symbols.space
+
+    call a:1.add_section('airline_a', spc.'TERMINAL'.spc)
+    call a:1.add_section('airline_b', '')
+    call a:1.add_section('airline_c', spc.'%f')
+    call a:1.split()
+    call a:1.add_section('airline_y', '')
+    call a:1.add_section('airline_z', spc.airline#section#create_right(['linenr', 'maxlinenr']))
+    redraw!
+    return 1
+    "let w:airline_section_b = ''
+    "let w:airline_section_x = ''
+    " Here we define a new part for the plugin.  This allows users to place this
+    " extension in arbitrary locations.
+    "call airline#parts#define_raw('term', '%{airline#extensions#term#get_highlight()}')
+
+    " Next up we add a funcref so that we can run some code prior to the
+    " statusline getting modifed.
+    "call a:ext.add_statusline_func('airline#extensions#term#apply')
+  endif
+endfunction
+
+function! airline#extensions#term#init(ext)
+  call a:ext.add_statusline_func('airline#extensions#term#apply')
+endfunction
diff --git a/autoload/airline/themes.vim b/autoload/airline/themes.vim
index 75c2f40d..1de4c38b 100644
--- a/autoload/airline/themes.vim
+++ b/autoload/airline/themes.vim
@@ -44,6 +44,10 @@ function! airline#themes#patch(palette)
     if !has_key(a:palette[mode], 'airline_error')
       let a:palette[mode]['airline_error'] = [ '#000000', '#990000', 232, 160 ]
     endif
+    if !has_key(a:palette[mode], 'airline_term')
+      "let a:palette[mode]['airline_term'] = [ '#9cffd3', '#202020', 85, 232]
+      let a:palette[mode]['airline_term'] = airline#highlighter#get_highlight('airline_c')
+    endif
   endfor
 
   let a:palette.accents = get(a:palette, 'accents', {})