1 files changed, 51 insertions, 0 deletions
diff --git a/autoload/xolox/misc/buffer.vim b/autoload/xolox/misc/buffer.vim
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+" Vim auto-load script
+" Author: Peter Odding <peter@peterodding.com>
+" Last Change: April 18, 2013
+" URL: http://peterodding.com/code/vim/misc/
+
+function! xolox#misc#buffer#is_empty() " {{{1
+  " Check if the current buffer is an empty, unchanged buffer which can be reused.
+  return !&modified && expand('%') == '' && line('$') <= 1 && getline(1) == ''
+endfunction
+
+function! xolox#misc#buffer#prepare(...) " {{{1
+  " Open a special buffer (with generated contents, not directly edited by the user).
+  if a:0 == 1 && type(a:1) == type('')
+    " Backwards compatibility with old interface.
+    let options = {'name': a:1, 'path': a:1}
+  elseif type(a:1) == type({})
+    let options = a:1
+  else
+    throw "Invalid arguments"
+  endif
+  let winnr = 1
+  let found = 0
+  for bufnr in tabpagebuflist()
+    if xolox#misc#path#equals(options['path'], bufname(bufnr))
+      execute winnr . 'wincmd w'
+      let found = 1
+      break
+    else
+      let winnr += 1
+    endif
+  endfor
+  if !(found || xolox#misc#buffer#is_empty())
+    vsplit
+  endif
+  silent execute 'edit' fnameescape(options['path'])
+  lcd " clear working directory
+  setlocal buftype=nofile bufhidden=hide noswapfile
+  let &l:statusline = '[' . options['name'] . ']'
+  call xolox#misc#buffer#unlock()
+  silent %delete
+endfunction
+
+function! xolox#misc#buffer#lock() " {{{1
+  " Lock a special buffer so it can no longer be edited.
+  setlocal readonly nomodifiable nomodified
+endfunction
+
+function! xolox#misc#buffer#unlock() " {{{1
+  " Unlock a special buffer so that its content can be updated.
+  setlocal noreadonly modifiable
+endfunction