extract colors from normal if undefined (#67, #113).

README.md

@@ -11,7 +11,7 @@ Lean & mean statusline for vim that's light as air.
 *  looks good with regular fonts and provides configuration points so you can use unicode or powerline symbols.
 *  optimized for speed; it loads in under a millisecond.
 *  fully customizable; if you know a little `statusline` syntax you can tweak it to your needs.
-*  trivial to write colorschemes; for a minimal theme you need to edit 9 lines of colors (please send pull requests).
+*  trivial to write colorschemes; over 10 themes have been contributed.
 *  supports 7.2 as the minimum Vim version
 
 # Rationale

autoload/airline/themes.vim

@@ -19,9 +19,17 @@ function! s:get_syn(group, what)
 endfunction
 
 function! s:get_array(fg, bg, opts)
+  let fg = a:fg
+  let bg = a:bg
+  if fg == '' || fg < 0
+    let fg = s:get_syn('Normal', 'fg')
+  endif
+  if bg == '' || bg < 0
+    let bg = s:get_syn('Normal', 'bg')
+  endif
   return has('gui_running')
-        \ ? [ a:fg, a:bg, '', '', join(a:opts, ',') ]
+        \ ? [ fg, bg, '', '', join(a:opts, ',') ]
-        \ : [ '', '', a:fg >= 0 ? a:fg : '', a:bg >= 0 ? a:bg : '', join(a:opts, ',') ]
+        \ : [ '', '', fg, bg, join(a:opts, ',') ]
 endfunction
 
 function! airline#themes#get_highlight(group, ...)

autoload/airline/themes/tomorrow.vim

@@ -2,7 +2,7 @@ function! s:generate()
   let s:file = airline#themes#get_highlight('Constant')
   let s:N1 = airline#themes#get_highlight('DiffDelete', 'bold')
   let s:N2 = airline#themes#get_highlight('Pmenu')
-  let s:N3 = airline#themes#get_highlight('NonText')
+  let s:N3 = airline#themes#get_highlight('CursorLine')
   let g:airline#themes#tomorrow#normal = airline#themes#generate_color_map(s:N1, s:N2, s:N3, s:file)
   let g:airline#themes#tomorrow#normal_modified = {
         \ 'statusline': airline#themes#get_highlight('vimCommand')
@@ -26,7 +26,7 @@ function! s:generate()
   let g:airline#themes#tomorrow#visual = airline#themes#generate_color_map(s:V1, s:V2, s:V3, s:file)
   let g:airline#themes#tomorrow#visual_modified = g:airline#themes#tomorrow#normal_modified
 
-  let s:IA = airline#themes#get_highlight2(['NonText', 'fg'], ['Normal', 'bg'])
+  let s:IA = airline#themes#get_highlight2(['NonText', 'fg'], ['CursorLine', 'bg'])
   let g:airline#themes#tomorrow#inactive = airline#themes#generate_color_map(s:IA, s:IA, s:IA, s:file)
 endfunction
 

doc/airline.txt

@@ -13,7 +13,7 @@ FEATURES                                                  *airline-features*
 *  integrates with many popular plugins.
 *  looks good with regular fonts, and provides configuration points so you
    can use unicode or powerline symbols.
-*  optimized for speed; it loads in 1ms.
+*  optimized for speed; it loads in under a millisecond.
 *  fully customizable; if you know a little |statusline| syntax you can
    tweak it to your needs.
 *  trivial to write colorschemes; for a minimal theme you need to edit
@@ -67,9 +67,11 @@ values):
 >
   let g:airline_detect_paste=1
 <
+
 * enable iminsert detection
 >
   let g:airline_detect_iminsert=1
+<
 
 * change the default theme
 >