My .vimrc

.vimrc

" set UTF-8 encoding
set enc=utf-8
set fenc=utf-8
set termencoding=utf-8
" disable vi compatibility (emulation of old bugs)
set nocompatible
" use indentation of previous line
set autoindent
" use intelligent indentation for C
set smartindent
" configure tabwidth and insert spaces instead of tabs
set tabstop=4        " tab width is 4 spaces
set shiftwidth=4     " indent also with 4 spaces
set expandtab        " expand tabs to spaces
" wrap lines at 120 chars. 80 is somewaht antiquated with nowadays displays.
set textwidth=120
" turn syntax highlighting on
set t_Co=256
syntax on
" colorscheme wombat256
" turn line numbers on
set number
" highlight matching braces
set showmatch
" intelligent comments
set comments=sl:/*,mb:\ *,elx:\ */

" Enhanced keyboard mappings
"
" in normal mode F2 will save the file
nmap <F2> :w<CR>
" in insert mode F2 will exit insert, save, enters insert again
imap <F2> <ESC>:w<CR>i
" switch between header/source with F4
map <F4> :e %:p:s,.h$,.X123X,:s,.cpp$,.h,:s,.X123X$,.cpp,<CR>
" make with F7
map <F7> :make<CR>
" build using makeprg with <S-F7>
map <S-F7> :make clean all<CR>

" spell settings
:setlocal spell spelllang=en
" set the spellfile - folders must exist
set spellfile=~/.vim/spellfile.add
map <M-Down> ]s
map <M-Up> [s
" remove trailing spaces
autocmd FileType c,cpp,java,php autocmd BufWritePre <buffer> %s/\s\+$//e

" smart numbering
:set number relativenumber
:augroup numbertoggle
:  autocmd!
:  autocmd BufEnter,FocusGained,InsertLeave * set relativenumber
:  autocmd BufLeave,FocusLost,InsertEnter   * set norelativenumber
:augroup END

" current line highlight
set cursorline

" pane navigation
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>

" natural pane spliting
set splitbelow
set splitright