extract matching background colors for file indicator

autoload/airline/themes/badwolf.vim

@@ -15,7 +15,7 @@ let s:V4 = [ '#c7915b' , 173 ]                   " coffee
 let s:PA = [ '#f4cf86' , 222 ]                   " dirtyblonde
 let s:RE = [ '#ff9eb8' , 211 ]                   " dress
 
-let s:file = [ '#ff2c4b' , s:N3[1] , 196     , s:N3[3] , '' ]
+let s:file = [ '#ff2c4b' , ''      , 196     , ''      , '' ]
 let s:IA   = [ s:N2[1]   , s:N3[1] , s:N2[3] , s:N3[3] , '' ]
 
 

autoload/airline/themes/bubblegum.vim

@@ -20,7 +20,7 @@ let s:cterm_red = 174
 let s:gui_pink = '#d7afd7'
 let s:cterm_pink = 182
 
-let s:file  = ['#ff0000', '#1c1c1c', 160, 233, '']
+let s:file  = ['#ff0000', '', 160, '', '']
 
 " Normal mode
 let s:N1    = [s:gui_dark_gray, s:gui_green, s:cterm_dark_gray, s:cterm_green]

autoload/airline/themes/dark.vim

@@ -23,10 +23,10 @@
 "
 " The array is in the format [ guifg, guibg, ctermfg, ctermbg, opts ].
 " The opts takes in values from ":help attr-list".
-let s:file = [ '#ff0000' , '#1c1c1c' , 160 , 233 , '' ]
-let s:N1 = [ '#00005f' , '#dfff00' , 17  , 190 ]
-let s:N2 = [ '#ffffff' , '#444444' , 255 , 238 ]
-let s:N3 = [ '#9cffd3' , '#202020' , 85  , 234 ]
+let s:file = [ '#ff0000' , ''        , 160 , ''    , '' ]
+let s:N1   = [ '#00005f' , '#dfff00' , 17  , 190 ]
+let s:N2   = [ '#ffffff' , '#444444' , 255 , 238 ]
+let s:N3   = [ '#9cffd3' , '#202020' , 85  , 234 ]
 
 " vim-airline is made up of multiple sections, but for theming purposes there
 " is only 3 sections: the mode, the branch indicator, and the gutter (which

autoload/airline/themes/jellybeans.vim

@@ -6,10 +6,16 @@ function! s:generate()
 
   " Here are examples where the entire highlight group is copied and an airline
   " compatible color array is generated.
-  let s:file = airline#themes#get_highlight('Constant')
   let s:N1 = airline#themes#get_highlight('DbgCurrent', 'bold')
   let s:N2 = airline#themes#get_highlight('Folded')
   let s:N3 = airline#themes#get_highlight('NonText')
+
+  " The file indicator is a special case where if the background values are
+  " empty the generate_color_map function will extract a matching color.
+  let s:file = airline#themes#get_highlight('Constant')
+  let s:file[1] = ''
+  let s:file[3] = ''
+
   let g:airline#themes#jellybeans#normal = airline#themes#generate_color_map(s:N1, s:N2, s:N3, s:file)
   let g:airline#themes#jellybeans#normal_modified = {
         \ 'statusline': [ '#ffb964', '', 215, '', '' ]

autoload/airline/themes/laederon.vim

@@ -24,7 +24,7 @@ let s:RE = [ '#233e09' , 22 ] " oakleaf
 " Paste mode
 let s:PA = [ '#ab3e5d' , 161 ] " raspberry
 
-let s:file = [ '#ef393d' , s:N3[1] , 196 , s:N3[3] , '' ]
+let s:file = [ '#ef393d' , '' , 196 , '' , '' ]
 let s:IA = [ s:N2[1]	, s:N3[1]	, s:N2[3],	s:N3[3]	, '' ]	
 
 

autoload/airline/themes/light.vim

@@ -1,4 +1,4 @@
-let s:file = [ '#df0000' , '#ffffff' , 160 , 255 ]
+let s:file = [ '#df0000' , '' , 160 , '' ]
 let s:N1 = [ '#ffffff' , '#005fff' , 255 , 27  ]
 let s:N2 = [ '#000087' , '#00dfff' , 18  , 45  ]
 let s:N3 = [ '#005fff' , '#afffff' , 27  , 159 ]

autoload/airline/themes/simple.vim

@@ -36,7 +36,7 @@ let s:termbg = 232
 let s:termsep = 236
 let s:guisep = '#303030'
 
-let s:file = [ '#ff0000' , s:guibg , 160       , s:termbg , ''     ]
+let s:file = [ '#ff0000' , '' , 160 , '' , '' ]
 let s:N1 = s:swap ? [ s:guibg , '#00dfff' , s:termbg , 45 ] : [ '#00dfff' , s:guibg , 45 , s:termbg ]
 let s:N2 = [ '#ff5f00' , s:guibg, 202 , s:termbg ]
 let s:N3 = [ '#767676' , s:guibg, 243 , s:termbg ]

autoload/airline/themes/tomorrow.vim

@@ -1,5 +1,8 @@
 function! s:generate()
   let s:file = airline#themes#get_highlight('Constant')
+  " clear out backgrounds so generate_color_map will fill them in
+  let s:file[1] = ''
+  let s:file[3] = ''
 
   let s:N1 = airline#themes#get_highlight2(['Normal', 'bg'], ['Directory', 'fg'], 'bold')
   let s:N2 = airline#themes#get_highlight('Pmenu')

autoload/airline/themes/ubaryd.vim

@@ -24,7 +24,7 @@ let s:RE = [ '#c7915b' , 173 ] " nut
 " Paste mode
 let s:PA = [ '#f9ef6d' , 154 ] " bleaklemon
 
-let s:file = [ '#ff7400' , s:N3[1] , 196 , s:N3[3] , '' ]
+let s:file = [ '#ff7400' , '' , 196 , '' , '' ]
 let s:IA = [ s:N2[1]	, s:N3[1]	, s:N2[3],	s:N3[3]	, '' ]	
 
 

autoload/airline/themes/wombat.vim

@@ -33,7 +33,7 @@ let s:PA = [ '#94E42C' , 47 ]
 let s:IM = [ '#40403C' , 238 ]
 
 " File permissions (RO, etc)
-let s:file = [ '#E5786D' , s:N3[1] , 203 , s:N3[3] , '' ]
+let s:file = [ '#E5786D' , '' , 203 , '' , '' ]
 
 " Inactive mode
 let s:IA = [ '#767676' , s:N3[1] , 243 , s:N3[3] , '' ]