" general options
set nocompatible
set background=dark
set showcmd
set showmatch
set ignorecase
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
set belloff=all

set splitbelow
set splitright

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

" mouse
set mouse=a
set ttymouse=sgr

" the default includes autoselect, which syncs contents of visual selection
" to clipboard; that is slow and I don't need it
set clipboard=

" statusline
"
" colors:
"   User1: window number
"   User2: modified flag
"
" path [Help][Preview][RO][ftype] \\// [window number][+]
set statusline=%(%f\ %h%w%r%y\ %=\ %1*[%{winnr()}]%2*%m%*%)
" divider between left and right-aligned bits
set statusline+=%=
" line,byte column[-virtual column]
set statusline+=%(%l,%c%V\ %=\ %P%)

" use standard places for the vim state files
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

" trailing whitespace highlighting
augroup vimrc
   autocmd!
   autocmd VimEnter,WinNew * call matchadd('WhiteSpaceEOL', '\s\+$')
augroup END

" 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>

" zoom/maximize a window
nnoremap <C-w>z <C-w>\|<C-w>_

" miniSnip configuration
" FIXME split off?
let g:miniSnip_trigger = '<C-j>'

" 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