vimrc: Fix compatibility for older Vim versions.

[config/dotfiles.git] / vimrc

diff --git a/vimrc b/vimrc
index e8e945e3bc131a82b77c96747ac4787afd2ef673..491979b73622e1145d87597a652bf6284fae4362 100644 (file)
--- a/vimrc
+++ b/vimrc
@@ -49,8 +49,11 @@ set encoding=utf-8
 set runtimepath-=~/.vim
 set runtimepath^=~/.vim,~/.vim/runtime
 
-" Don't store swap files in the same directory as the edited file.
-set directory-=.
+" Don't store swap files in the same directory as the edited file. But only if
+" we have a "safe" writable directory available.
+if filewritable('~/.tmp') == 2 || filewritable('~/tmp') == 2
+    set directory-=.
+endif
 " But store them in ~/.tmp or ~/tmp (already set by default) if available.
 set directory^=~/.tmp
 
@@ -90,9 +93,9 @@ endif
 
 " HELPER FUNCTIONS
 
+if has('eval')
 " Check if the given syntax group is available. Thanks to bairui in #vim on
 " Freenode (2012-02-19 01:15 CET) for the try/catch silent highlight idea.
-if has('eval')
     function! s:HasSyntaxGroup(group)
         try
             execute 'silent highlight ' . a:group
@@ -102,6 +105,12 @@ if has('eval')
         endtry
         return 1
     endfunction
+
+" Check if the given Vim version and patch is available.
+    function! s:HasVersionAndPatch(version, patch)
+        return v:version > a:version
+            \ || (v:version == a:version && has('patch' . a:patch))
+    endfunction
 endif
 
 
@@ -117,6 +126,9 @@ endif
 " existing files.
 set fileencodings=utf-8,latin1
 
+" Always use unix line-endings for new files.
+set fileformats=unix,dos
+
 " Wrap text after 78 characters.
 set textwidth=78
 
@@ -144,6 +156,10 @@ set formatoptions+=ro
 " Don't break a line if was already longer then 'textwidth' when insert mode
 " started.
 set formatoptions+=l
+" Remove comment leader when joining lines where it makes sense.
+if <SID>HasVersionAndPatch(703, 541)
+    set formatoptions+=j
+endif
 
 " Allow virtual editing (cursor can be positioned anywhere, even when there is
 " no character) in visual block mode.
@@ -156,8 +172,8 @@ set incsearch
 " Activate syntax folding.
 if has('folding')
     set foldmethod=syntax
-    " Only use fold column if we have enough space (for example in a (virtual)
-    " terminals).
+    " Only use fold column if we have enough space (for example not in a
+    " (virtual) terminal which has only 80 columns).
     if &columns > 80
         set foldcolumn=2
     endif
@@ -191,7 +207,7 @@ set hidden
 set background=dark
 
 " Use my color scheme if 256 colors are available.
-if &t_Co == 256
+if &t_Co == 256 || has('gui_running')
     colorscheme simon
 endif
 
@@ -337,7 +353,7 @@ if has('statusline')
     set statusline+=%02n  " buffer number
     set statusline+=%{StatuslineBufferCount()} " highest buffer number
     set statusline+=:
-    if has('modify_fname')
+    if has('modify_fname') && v:version >= 700 " some functions need 7.0
         set statusline+=%{StatuslineRelativeFilename()} " path to current file
         set statusline+=\     " space after path
     else
@@ -366,7 +382,7 @@ endif
 " modified by a plugin or other settings. Except for <Nop> which isn't
 " affected by mappings.
 
-" Easy way to exit insert mode.
+" Easy way to exit insert mode. jk is preferred because it's faster.
 inoremap jj <Esc>
 inoremap jk <Esc>
 " Also for command mode, thanks to http://github.com/mitechie/pyvim
@@ -425,7 +441,8 @@ endif
 
 " Write before suspending, thanks to deryni in #vim on Freenode (2011-05-09
 " 20:02 CEST). To suspend without saving either unmap this or use :stop<CR>.
-" Only the current buffer is written.
+" Only the current buffer is written, thus switching to another buffer works
+" too.
 nnoremap <silent> <C-Z> :update<CR>:stop<CR>
 
 " 2<C-G> gives more verbose information, use it by default. Thanks to NCS_One
@@ -441,6 +458,33 @@ nmap - <C-B>
 " (2010-05-16 18:38 CEST) for this idea.
 nnoremap <silent> gb :bnext<CR>
 nnoremap <silent> gB :bprevious<CR>
+if has('eval')
+    " But when starting again at the first buffer, print a warning which
+    " reminds me that I've already seen that buffer.
+    function! s:NextBuffer()
+        " Are we currently on the last buffer and moving to the first?
+        let l:last_buffer = 0
+        if bufnr('%') == bufnr('$') && bufnr('$') > 1
+            let l:last_buffer = 1
+        endif
+
+        " Go to the next buffer.
+        if !l:last_buffer
+            bnext
+
+        " Go to the first buffer, silent is necessary or the following message
+        " won't be displayed because it's overwritten by the status message
+        " displayed when entering a buffer.
+        else
+            silent bnext
+
+            echohl WarningMsg
+            echo 'Starting again at first buffer.'
+            echohl None
+        endif
+    endfunction
+    nnoremap <silent> gb :call <SID>NextBuffer()<CR>
+endif
 
 " Fast access to buffers.
 nnoremap <silent> <Leader>1 :1buffer<CR>
@@ -704,14 +748,16 @@ if has('eval')
 " installing/removing/updating plugins simple. (Used for plugins with more
 " than one file.) Ignore errors in case pathogen is not installed.
     if v:version >= 700
-        silent! execute 'call pathogen#runtime_append_all_bundles()'
+        silent! execute 'call pathogen#infect()'
     endif
 
 " Settings for securemodelines.
     " Only allow items I need (also includes spl which is not enabled by
     " default).
-    let g:secure_modelines_allowed_items = ['ft', 'spl', 'fdm',
-                                          \ 'sw', 'sts', 'noet']
+    if v:version >= 700 " need lists
+        let g:secure_modelines_allowed_items = ['ft', 'spl', 'fdm',
+                                              \ 'sw', 'sts', 'noet']
+    endif
 
 " Settings for the NERD commenter.
     " Don't create any mappings I don't want to use.