-" Ask what to do when closing unsaved documents
-set confirm
-
-" If using a dark background within the editing area and syntax highlighting
-" turn on this option as well
-set background=dark
-
-" The following are commented out as they cause vim to behave a lot
-" differently from regular Vi. They are highly recommended though.
-set showcmd " Show (partial) command in status line.
-set showmatch " Show matching brackets.
-set ignorecase " Do case insensitive matching
-set smartcase " Do smart case matching
-set incsearch " Incremental search
-set autowrite " Automatically save before commands like :next and :make
-"set hidden " Hide buffers when they are abandoned
-"set mouse=a " Enable mouse usage (all modes)
-
-" expand tabs
-set softtabstop=4
-set shiftwidth=4
-set expandtab
-
-set showbreak=▒▒
-" show these chars for tabs and trailing spaces
-set list listchars=tab:»·,trail:·
-
-set pastetoggle=<F11>
-" split right when using :vsp
-set splitright
-
-set scrolloff=3 " keep at least 3 lines above/below
-" Press i to enter insert mode, and ii to exit.
-imap ii <Esc>
-" Press `` to toggle insert and replace mode (no <Insert> key on Mac keyboard)
-imap `` <Insert>
-
-" fold between {{{ }}}
-set foldmethod=marker
-set foldlevelstart=99
-" space will toggle current fold in normal mode, if not in a fold, normal
-" behaviour
+" multiple windows {{{1
+set laststatus=2 " 0, 1 or 2; when to use a status line for the last window
+
+set previewheight=20 " default height for the preview window
+
+set splitright " a new window is put right of the current one
+
+nmap <C-J> <C-W>j
+nmap <C-K> <C-W>k
+nmap <C-H> <C-W>h
+nmap <C-L> <C-W>l
+
+map <F1> :ls<CR>:b<space>
+
+" using the mouse {{{1
+set mouse=rnv " list of flags for using the mouse
+set ttymouse=xterm " type of mouse
+
+"xterm mouse with middleclick paste
+nnoremap <MiddleMouse> i<MiddleMouse>
+vnoremap <MiddleMouse> s<MiddleMouse>
+
+" messages and info {{{1
+set showcmd " Show (partial) command in status line.
+set ruler " show the cursor position all the time
+set confirm " Ask what to do when closing unsaved documents
+
+" editing text {{{1
+set backspace=indent,eol,start " allow backspacing over everything in insert mode
+
+set showmatch " Show matching brackets.
+
+set nojoinspaces " don't use two spaces after '.' when joining a line
+set formatoptions+=j " remove comment leader when joining lines
+
+set nrformats=hex " number formats recognized for CTRL-A and CTRL-X commands
+
+" whether to use a popup menu for Insert mode completion
+set completeopt=longest,menuone,preview
+
+" fix legacy vi inconsistency
+map Y y$
+
+" allow repeat operator on visual
+vnoremap . :normal .<CR>
+
+" add line without changing position or leaving mode
+map <Leader>o :set paste<CR>m`o<ESC>``:set nopaste<CR>
+map <Leader>O :set paste<CR>m`O<ESC>``:set nopaste<CR>
+
+" Don't use Ex mode, use Q for formatting
+map Q gq
+
+" allow undoing in insert-mode
+inoremap <C-U> <C-G>u<C-U>
+inoremap <C-W> <C-G>u<C-W>
+
+" tabs and indent {{{1
+set shiftwidth=4 " number of spaces used for each step of (auto)indent
+set smarttab " a <Tab> in an indent inserts 'shiftwidth' spaces
+set softtabstop=4 " if non-zero, number of spaces to insert for a <Tab>
+set shiftround " round to 'shiftwidth' for "<<" and ">>"
+set expandtab " expand <Tab> to spaces in Insert mode
+
+set cindent " use smart C indenting (see :h C-indenting)
+set cinoptions=l1,c4,(0,U1,w1,m1,j1,J1
+
+set pastetoggle=<F11> " key sequence to toggle paste mode
+
+nmap <Leader>b :set expandtab tabstop=4 shiftwidth=4 softtabstop=4<CR>
+nmap <Leader>B :set expandtab tabstop=8 shiftwidth=8 softtabstop=4<CR>
+nmap <Leader>M :set noexpandtab tabstop=8 softtabstop=4 shiftwidth=4<CR>
+nmap <Leader>m :set expandtab tabstop=2 shiftwidth=2 softtabstop=2<CR>
+
+" folding {{{1
+set foldmethod=marker " folding type
+set foldlevelstart=99 " value for 'foldlevel' when starting to edit a file
+
+" space will toggle current fold in normal mode