vimrc

set nu
set rnu
set showcmd
set hlsearch
set wrap
set linebreak
set ignorecase smartcase
set tabstop=4
set shiftwidth=4
set autoindent
"set expandtab
set noexpandtab
set visualbell
set t_vb=
set modeline
set encoding=utf-8
set incsearch "Start searching before pressing enter (see also: sensible-vim)
set shortmess-=S  "Show match position & count in status bar
set timeoutlen=1000 ttimeoutlen=0
set foldcolumn=1
set scrolloff=5
set display=lastline " display long lines at the bottom partially, instead of '@' symbols.
set splitbelow " open splits below the current one
set splitright " open vsplits to the right of the current one
set wildmode=longest,list,full " bash-like autocompletion for commands
set wildmenu
set foldopen-=search " do not open folds if there's a match inside them
set cursorline " highglight the line on which the cursor is atm.
set lazyredraw " redraw screen only when macro has finished, increases execution speed
set nojoinspaces " don't produce two spaces on 'J' when a line ends with a period
set shell=/bin/bash " to be compatible with xonsh
set autochdir " automatically set working directory to path of open file.
" actually cd to the current file (the above is only applied upon changing file)
cd %:p:h

" turn off rnu when in insert mode
au FocusLost * :set nornu
au FocusGained * :set rnu "TODO: fix the delay on this...
autocmd InsertEnter * :set nornu
autocmd InsertLeave * :set rnu


""""""""""""
" MAPPINGS "
""""""""""""

" switch [move] tabs with [ctrl] f7 / f8
map <F7> :tabp <CR>
map <C-F7> :tabm -<CR>
map <F8> :tabn <CR>
map <C-F8> :tabm +<CR>

" use alt + hjkl to navigate windows
" (doesn't work always e.g. in tmux)
nnoremap <A-h> <C-w>h
nnoremap <A-j> <C-w>j
nnoremap <A-k> <C-w>k
nnoremap <A-l> <C-w>l

" fixing some unutilized parts of the scandinavian keyboard (TODO: make this depend on keyboard layout?)
nnoremap å ^
vnoremap å ^
nnoremap gå g^
nnoremap ¤ $
nnoremap g¤ g$
" switch , and ; to be consistent with n vs N, f vs F etc (on the Finnish  keybaord at least).
" TODO: swap these based on if the previous command was f/F or t/T
nnoremap , ;
nnoremap ; ,
vnoremap , ;
vnoremap ; ,

" map ctrl-h to remove search highlight, shouldn't conflict with anything.
nnoremap <silent> <C-h> :noh<CR>

" swap around the mappings of w, b and e to make E mappable to ge to be consistent with the above
" TODO: is this a good idea? - needs a fourth key to work completely..
" nnoremap E ge
" nnoremap <silent> W :normal! b<CR>
" nnoremap <silent> b :normal! W<CR>
" nnoremap <silent> B :normal! B<CR>

" map non-breaking space to actual space
inoremap   <Space>

" inspired by http://karolis.koncevicius.lt/posts/porn_zen_and_vimrc/
nnoremap Y y$

" '*' on a visual selection searches for it (similar to normal mode*)
vnoremap * y/<C-R>"<CR>
" make n and N behave the same way regardless of whether * or # is used.
" TODO: something like :silent exec *NN so the screen doesn't jump around here
nnoremap # *NN
vnoremap # y/<C-R>"<CR>NN

" 'gd' with a capital D opens definition in new (small) split, to get a peak
nnoremap gD :10sp<CR> gd

" Map C-space to autocompletion
if has("gui_running")
    " C-Space seems to work under gVim on both Linux and win32
    "inoremap <C-Space> <C-n>
    "http://stackoverflow.com/questions/1506764/how-to-map-ctrla-and-ctrlshifta-differently
    "inoremap <C-S-Space> <C-p>
    inoremap <C-Space> <C-p>
else " no gui
  set nocursorline " disable this for command line (at least on putty this interferes with undercore.)
  if has("unix")
    inoremap <Nul> <C-n>
    "inoremap <S-Nul> <C-p> ??? 
  endif
endif

" pressing enter when the autocomplete menu is open just selects the option.
"inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
" pressing esc when the autocomplete menu is open leaves the current option in place and exits insert mode
"TODO, this doesn't work. it inputs pumvisible instead of calling the function...
"inoremap <expr> <ESC> pumvisible() ? "\<C-y><ESC>" : "\<C-g>u\<ESC>"

"TODO: filetype plugin for directories (filetype = 'netwr' or sth), which maps
"keys to search like in file browsers, and alt-j to down and alt-h to up etc.
"'for x in abcdefghijlkmnopqrstuwvxyz: nnoremap <buffer> $x /$x'

" capital ':Tabe' is like ':tabe' except that if  the file is already open in a tab, switch to that.
command -nargs=* -complete=file Tabe tab drop <args>

"""""""""""
" PLUGINS "
"""""""""""

au BufEnter,BufWinEnter,BufNewFile,BufRead *.sc,*.scd set filetype=supercollider
au Filetype supercollider packadd scvim

call plug#begin('~/.vim/plugged')
 Plug 'lervag/vimtex', {'for': ['tex', 'plaintex']} " TODO: for plaintex as well (?)
 "TODO: surround.vim
 "Plug 'https://github.com/tpope/vim-surround.git'
call plug#end() "


"""""""""""""""""""""""""""""""""""
" SETTINGS SPECIFIC TO FILE TYPES "
"""""""""""""""""""""""""""""""""""

" TODO: figure out what 'indent' and 'plugin' mean...
filetype indent plugin on

" LaTeX specific options
" see also: ftplugin/tex.vim
let g:tex_flavor = "latex"
let g:tex_comment_nospell = 1

"TODO: make this only for tex files.
let g:AutoClosePairs_add = "$"

" don't expand spaces after auto-closing brackets. Needed to make
" abbreviations work.
let g:AutoCloseExpandSpace = 0

" Set up colos for folding
hi FoldColumn ctermbg=none ctermfg=cyan
hi Folded ctermbg=none ctermfg=cyan

" highlight trailing whitespace, from http://vim.wikia.com/wiki/Highlight_unwanted_spaces
" TODO: get colors from colorscheme...
highlight TrailingWhitespace ctermbg=red guibg=red
au InsertEnter * match TrailingWhitespace /\s\+\%#\@<!$/
au InsertLeave * match TrailingWhitespace /\s\+$/

" Abbreviations are defined in a separate file. NOTE: disabled
" 'AutoCloseExpandSpace' from AutoClose.vim.
source ~/.vim/abbrev.vim