Merge branch 'dev'

autoload/airline.vim

@@ -31,8 +31,18 @@ function! airline#load_theme()
 endfunction
 
 function! airline#switch_theme(name)
+  try
+    let palette = g:airline#themes#{a:name}#palette "also lazy loads the theme
     let g:airline_theme = a:name
-  let palette = g:airline#themes#{g:airline_theme}#palette "also lazy loads the theme
+  catch
+    echohl WarningMsg | echo 'The specified theme cannot be found.' | echohl NONE
+    if exists('g:airline_theme')
+      return
+    else
+      let g:airline_theme = 'dark'
+      let palette = g:airline#themes#dark#palette
+    endif
+  endtry
   call airline#themes#patch(palette)
 
   if exists('g:airline_theme_patch_func')

autoload/airline/extensions/tabline.vim

@@ -124,12 +124,13 @@ function! s:get_visible_buffers()
 
   " only show current and surrounding buffers if there are too many buffers
   let position  = index(buffers, cur)
-  if total_width > winwidth(0) && position > -1
+  let vimwidth = &columns
+  if total_width > vimwidth && position > -1
     let buf_count = len(buffers)
 
     " determine how many buffers to show based on the longest buffer width,
     " use one on the right side and put the rest on the left
-    let buf_max   = winwidth(0) / max_width
+    let buf_max   = vimwidth / max_width
     let buf_right = 1
     let buf_left  = max([0, buf_max - buf_right])
 

autoload/airline/init.vim

@@ -61,6 +61,10 @@ function! airline#init#bootstrap()
         \ 'modified': '+',
         \ 'space': ' ',
         \ }, 'keep')
+endfunction
+
+function! airline#init#sections()
+  let g:airline#init#initializing_sections = 1
 
   call airline#parts#define('mode', {
         \ 'function': 'airline#parts#mode',
@@ -77,9 +81,7 @@ function! airline#init#bootstrap()
   call airline#parts#define_raw('linenr', (g:airline_symbols.linenr).'%#__accent_bold#%4l%#__restore__#')
   call airline#parts#define_function('ffenc', 'airline#parts#ffenc')
   call airline#parts#define_empty(['hunks', 'branch', 'tagbar', 'syntastic', 'whitespace'])
-endfunction
 
-function! airline#init#sections()
   let spc = g:airline_symbols.space
   if !exists('g:airline_section_a')
     let g:airline_section_a = airline#section#create_left(['mode', 'paste', 'iminsert'])
@@ -105,5 +107,7 @@ function! airline#init#sections()
   if !exists('g:airline_section_warning')
     let g:airline_section_warning = airline#section#create(['syntastic', 'whitespace'])
   endif
+
+  unlet g:airline#init#initializing_sections
 endfunction
 

autoload/airline/parts.vim

@@ -7,7 +7,11 @@ let s:parts = {}
 
 function! airline#parts#define(key, config)
   let s:parts[a:key] = get(s:parts, a:key, {})
-  call extend(s:parts[a:key], a:config)
+  if exists('g:airline#init#initializing_sections')
+    call extend(s:parts[a:key], a:config, 'keep')
+  else
+    call extend(s:parts[a:key], a:config, 'force')
+  endif
 endfunction
 
 function! airline#parts#define_function(key, name)

t/init.vim

@@ -6,10 +6,11 @@ function! s:clear()
   endfor
 endfunction
 
-describe 'init'
+call airline#init#bootstrap()
+
+describe 'init sections'
   before
     call s:clear()
-    call airline#init#bootstrap()
     call airline#init#sections()
   end
 
@@ -65,3 +66,11 @@ describe 'init'
   end
 end
 
+describe 'init parts'
+  it 'should not redefine parts already defined'
+    call airline#parts#define_raw('linenr', 'bar')
+    call airline#init#sections()
+    Expect g:airline_section_z =~ 'bar'
+  end
+end
+