" general options
set nocompatible
set background=dark
set showcmd
set showmatch
set smartcase
set incsearch
set autowrite

syntax on
filetype plugin indent on

" TODO: reconsider this, possible risk
set modeline
set wrapmargin=4
set linebreak
set ruler
set cryptmethod=blowfish
set foldmethod=syntax
set scrolloff=3
set wildmenu
set hlsearch
set conceallevel=2
set ttyfast
set undofile
set nojoinspaces

" tabs handling
set expandtab
set shiftwidth=4
set tabstop=4

" mouse
set mouse=a
set ttymouse=sgr

" trailing whitespace highlighting
highlight WhiteSpaceEOL ctermbg=darkgreen
match WhiteSpaceEOL /\s\+$/

" put all the vim files under ~/.vim to avoid polluting the rest of the
" filesystem with them
set dir=~/.cache/vim/swap
set backupdir=~/.cache/vim/bkp
set undodir=~/.local/var/vim/undo
set viminfo+=n~/.local/var/vim/viminfo

if &t_Co < 88
    colorscheme default
else
    let g:inkpot_black_background = 1
    colorscheme inkpot
endif

" extension-based filetypes
let filetype_m="mma"
let filetype_par="config"

".tex files default to latex
let g:tex_flavor='latex'

" enable syntax folding in viml files
let g:vimsyn_folding = 'af'

" autodisable syntax folding for c files (it's slow)
autocmd BufEnter *.c,*.h setlocal foldmethod=manual
" C indent options
set cinoptions=(0

""" key mappings
map zJ zjzo
" the default mapping enters the ex mode, which is very annoying since it's
" easy to trigger by mistake (going for ZQ, missing Z)
map Q <Nop>
nmap gb :bnext<CR>
nmap gB :bprevious<CR>
map <leader>m :make<CR>
nnoremap <Leader>b :FufBuffer<CR>
nnoremap <Leader>d :FufDir<CR>
nnoremap <Leader>f :FufCoverageFile<CR>

" miniSnip configuration
" FIXME split off?
let g:miniSnip_trigger = '<C-j>'
let g:miniSnip_dirs = ['~/.vim/miniSnip']

" line diff mode
" TODO: split off into plugin?
function LineDiff()
    silent execute "!linediff " . v:fname_in . " " . v:fname_new . " > " . v:fname_out
endfunction

function SetLineDiff()
    set diffexpr=LineDiff()
    diffupdate
    redraw
endfunction

" hybrid line numbers
augroup numbertoggle
    autocmd!
    autocmd BufEnter,FocusGained,InsertLeave,WinEnter * if &nu | set rnu | endif
    autocmd BufLeave,FocusLost,InsertEnter,WinLeave * if &nu | set nornu | endif
augroup END