From f7835562a33ca57fe7dc3320af3167ca4e255b9d Mon Sep 17 00:00:00 2001
From: Bailey Ling <bling@live.ca>
Date: Wed, 27 Jan 2016 23:11:11 -0500
Subject: [PATCH] spike for combined buffers/tabs

prototype for #639
---
 autoload/airline/extensions/tabline.vim       | 24 +++++++++-
 .../airline/extensions/tabline/buffers.vim    | 18 +------
 .../airline/extensions/tabline/combined.vim   | 25 ++++++++++
 autoload/airline/extensions/tabline/tabs.vim  | 48 +++++++++++--------
 4 files changed, 77 insertions(+), 38 deletions(-)
 create mode 100644 autoload/airline/extensions/tabline/combined.vim

diff --git a/autoload/airline/extensions/tabline.vim b/autoload/airline/extensions/tabline.vim
index 8f2f9591..a2d1543f 100644
--- a/autoload/airline/extensions/tabline.vim
+++ b/autoload/airline/extensions/tabline.vim
@@ -5,12 +5,13 @@ let s:formatter = get(g:, 'airline#extensions#tabline#formatter', 'default')
 let s:show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
 let s:show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
 let s:ignore_bufadd_pat = get(g:, 'airline#extensions#tabline#ignore_bufadd_pat', '\c\vgundo|undotree|vimfiler|tagbar|nerd_tree')
+let s:combined = get(g:, 'airline#extensions#tabline#combined', 1)
+
 let s:taboo = get(g:, 'airline#extensions#taboo#enabled', 1) && get(g:, 'loaded_taboo', 0)
 if s:taboo
   let g:taboo_tabline = 0
 endif
 
-
 function! airline#extensions#tabline#init(ext)
   if has('gui_running')
     set guioptions-=e
@@ -133,3 +134,24 @@ function! airline#extensions#tabline#new_builder()
 
   return airline#builder#new(builder_context)
 endfunction
+
+function! airline#extensions#tabline#group_of_bufnr(tab_bufs, bufnr)
+  let cur = bufnr('%')
+  if cur == a:bufnr
+    if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
+      let group = 'airline_tabmod'
+    else
+      let group = 'airline_tabsel'
+    endif
+    let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
+  else
+    if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
+      let group = 'airline_tabmod_unsel'
+    elseif index(a:tab_bufs, a:bufnr) > -1
+      let group = 'airline_tab'
+    else
+      let group = 'airline_tabhid'
+    endif
+  endif
+  return group
+endfunction
diff --git a/autoload/airline/extensions/tabline/buffers.vim b/autoload/airline/extensions/tabline/buffers.vim
index df6c93d7..f8353b39 100644
--- a/autoload/airline/extensions/tabline/buffers.vim
+++ b/autoload/airline/extensions/tabline/buffers.vim
@@ -62,23 +62,7 @@ function! airline#extensions#tabline#buffers#get()
       continue
     endif
 
-    if cur == nr
-      if g:airline_detect_modified && getbufvar(nr, '&modified')
-        let group = 'airline_tabmod'
-      else
-        let group = 'airline_tabsel'
-      endif
-      let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
-    else
-      if g:airline_detect_modified && getbufvar(nr, '&modified')
-        let group = 'airline_tabmod_unsel'
-      elseif index(tab_bufs, nr) > -1
-        let group = 'airline_tab'
-      else
-        let group = 'airline_tabhid'
-      endif
-    endif
-
+    let group = airline#extensions#tabline#group_of_bufnr(tab_bufs, nr)
     if s:buffer_idx_mode
       if len(s:number_map) > 0
         call b.add_section(group, s:spc . get(s:number_map, l:index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
diff --git a/autoload/airline/extensions/tabline/combined.vim b/autoload/airline/extensions/tabline/combined.vim
new file mode 100644
index 00000000..bd71eb6d
--- /dev/null
+++ b/autoload/airline/extensions/tabline/combined.vim
@@ -0,0 +1,25 @@
+" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" vim: et ts=2 sts=2 sw=2
+
+let s:spc = g:airline_symbols.space
+
+function! airline#extensions#tabline#combined#get()
+  let curtabnr = tabpagenr()
+  let b = airline#extensions#tabline#new_builder()
+
+  let buffers = tabpagebuflist(curtabnr)
+  for nr in buffers
+    let group = airline#extensions#tabline#group_of_bufnr(buffers, nr)
+    call b.add_section(group, s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
+  endfor
+
+  call b.add_section('airline_tabfill', '')
+  call b.split()
+  call b.add_section('airline_tabfill', '')
+
+  for tabnr in range(1, tabpagenr('$'))
+    let group = tabnr == curtabnr ? 'airline_tabtype' : 'airline_tab'
+    call b.add_section(group, s:spc . 'tab' . s:spc . tabnr . s:spc . '%' . tabnr . 'X' . 'x' . '%X' . s:spc)
+  endfor
+  return b.build()
+endfunction
diff --git a/autoload/airline/extensions/tabline/tabs.vim b/autoload/airline/extensions/tabline/tabs.vim
index 02e4dc9d..7215cea9 100644
--- a/autoload/airline/extensions/tabline/tabs.vim
+++ b/autoload/airline/extensions/tabline/tabs.vim
@@ -6,6 +6,7 @@ let s:tab_nr_type = get(g:, 'airline#extensions#tabline#tab_nr_type', 0)
 let s:show_close_button = get(g:, 'airline#extensions#tabline#show_close_button', 1)
 let s:show_tab_type = get(g:, 'airline#extensions#tabline#show_tab_type', 1)
 let s:close_symbol = get(g:, 'airline#extensions#tabline#close_symbol', 'X')
+let s:spc = g:airline_symbols.space
 
 let s:current_bufnr = -1
 let s:current_tabnr = -1
@@ -39,6 +40,17 @@ function! airline#extensions#tabline#tabs#get()
   endif
 
   let b = airline#extensions#tabline#new_builder()
+
+  let buffers = tabpagebuflist(curtab)
+  for nr in buffers
+    let group = airline#extensions#tabline#group_of_bufnr(buffers, nr)
+    call b.add_section(group, s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
+  endfor
+
+  call b.add_section('airline_tabfill', '')
+  call b.split()
+  call b.add_section('airline_tabfill', '')
+
   for i in range(1, tabpagenr('$'))
     if i == curtab
       let group = 'airline_tabsel'
@@ -53,28 +65,24 @@ function! airline#extensions#tabline#tabs#get()
     else
       let group = 'airline_tab'
     endif
-    let val = '%('
-    if s:show_tab_nr
-      if s:tab_nr_type == 0
-        let val .= (g:airline_symbols.space).'%{len(tabpagebuflist('.i.'))}'
-      elseif s:tab_nr_type == 1
-        let val .= (g:airline_symbols.space).i
-      else "== 2
-        let val .= (g:airline_symbols.space).i.'.%{len(tabpagebuflist('.i.'))}'
-      endif
-    endif
-    call b.add_section(group, val.'%'.i.'T %{airline#extensions#tabline#title('.i.')} %)')
+    " if s:show_tab_nr
+    "   if s:tab_nr_type == 0
+    "     let tablen = s:spc . '%{len(tabpagebuflist('.i.'))}'
+    "   elseif s:tab_nr_type == 1
+    "     let tablen = s:spc . i
+    "   else "== 2
+    "     let tablen = s:spc . i . '.%{len(tabpagebuflist('.i.'))}'
+    "   endif
+    " endif
+    call b.add_section(group, '%T'.i.' tab ' . i)
   endfor
 
-  call b.add_raw('%T')
-  call b.add_section('airline_tabfill', '')
-  call b.split()
-  if s:show_close_button
-    call b.add_section('airline_tab', ' %999X'.s:close_symbol.' ')
-  endif
-  if s:show_tab_type
-    call b.add_section('airline_tabtype', ' tabs ')
-  endif
+  " if s:show_close_button
+  "   call b.add_section('airline_tab', ' %999X'.s:close_symbol.' ')
+  " endif
+  " if s:show_tab_type
+  "   call b.add_section('airline_tabtype', ' tabs ')
+  " endif
 
   let s:current_bufnr = curbuf
   let s:current_tabnr = curtab