.vimrc

set nocompatible
filetype off

set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()

Plugin 'VundleVim/Vundle.vim'
Plugin 'scrooloose/nerdtree'
Plugin 'kien/ctrlp.vim'
Plugin 'vim-airline/vim-airline'
Plugin 'tpope/vim-fugitive'
Plugin 'derekwyatt/vim-scala'
Plugin 'airblade/vim-gitgutter'
" Plugin 'scrooloose/syntastic'
Plugin 'majutsushi/tagbar'
Plugin 'mileszs/ack.vim'
Plugin 'Raimondi/delimitMate'
Plugin 'tpope/vim-surround'
Plugin 'neovimhaskell/haskell-vim'
Plugin 'Yggdroot/indentLine'
Plugin 'tpope/vim-commentary'
Plugin 'myusuf3/numbers.vim'
Plugin 'w0rp/ale'
Plugin 'sevko/vim-nand2tetris-syntax'
Plugin 'terryma/vim-expand-region'
Plugin 'itchyny/vim-haskell-indent'
Plugin 'eagletmt/neco-ghc'
Plugin 'Shougo/neocomplete.vim'
Plugin 'eagletmt/ghcmod-vim'
Plugin 'Shougo/vimproc.vim'
Plugin 'Shougo/deoplete.nvim'
Plugin 'kshenoy/vim-signature'

Plugin 'morhetz/gruvbox'
" Plugin 'sjl/badwolf'
" Plugin 'flazz/vim-colorschemes'

call vundle#end()

" auto-complete for command line
set wildmenu
set wildmode=longest:full,full

" always show status line
set laststatus=2

" highlight search, show search results while typing
set hlsearch incsearch

" show line numbers
set number
highlight LineNr ctermfg=grey

" highlight current line
set cursorline

" when scrolling, keep two lines between active line and window edge
set scrolloff=2

" show invisibles
set list listchars=tab:>-,trail:•

" remove delay for Esc key
set timeoutlen=1000 ttimeoutlen=0

set encoding=utf-8
set tabstop=4
" use spaces instead of tabs
set expandtab

" shut up
set visualbell

" case insensitive search
set ignorecase smartcase

" backspace can delete everything
set backspace=indent,eol,start

" options for MacVim
set guifont=FiraCode-Regular:h14
" hide left scrolling
set guioptions-=L
" use console dialogs
set guioptions+=c

" color settings
set background=dark
colorscheme gruvbox
let g:gruvbox_contrast_dark='hard'
let g:gruvbox_contrast_light='hard'
" use gui colors in terminal
set termguicolors

" enable filetype
filetype indent plugin on

" syntax highlighting
syntax enable

" cursor shape for iTerm
" let &t_SI = "\<Esc>]50;CursorShape=1\x7"
" let &t_SR = "\<Esc>]50;CursorShape=2\x7"
" let &t_EI = "\<Esc>]50;CursorShape=0\x7"

" airline settings
let g:airline_powerline_fonts = 1
let g:airline#extensions#tabline#buffer_nr_show = 1
let g:airline#extensions#tabline#enabled = 1
let g:airline_theme='gruvbox'

" NeoComplete
let g:neocomplete#enable_at_startup = 1
let g:neocomplete#enable_auto_select = 1
" inoremap <silent> <CR> <C-r>=<SID>my_cr_function()<CR>
" function! s:my_cr_function()
" return (pumvisible() ? "\<C-y>" : "" ) . "\<CR>"
" For no inserting <CR> key.
" return pumvisible() ? "\<C-y>" : "\<CR>"
" endfunction
" <TAB>: completion.
" inoremap <expr><TAB>  pumvisible() ? "\<C-n>" : "\<TAB>"
" <C-h>, <BS>: close popup and delete backword char.
" inoremap <expr><C-h> neocomplete#smart_close_popup()."\<C-h>"
" inoremap <expr><BS> neocomplete#smart_close_popup()."\<C-h>"

" haskell
let g:haskell_enable_typeroles = 1
let g:haskellmode_completion_ghc = 0
autocmd FileType haskell setlocal omnifunc=necoghc#omnifunc
autocmd FileType haskell set formatprg=stylish-haskell

" Disable ALE by default because it is very slow on large files
let g:ale_sign_column_always = 0
let g:ale_lint_on_enter = 0
let g:ale_lint_on_save = 0
let g:ale_lint_on_text_changed = 0

" Tagbar settings for haskell
let g:tagbar_type_haskell = {
    \ 'ctagsbin'  : 'hasktags',
    \ 'ctagsargs' : '-x -c -o-',
    \ 'kinds'     : [
        \  'm:modules:0:1',
        \  'd:data: 0:1',
        \  'd_gadt: data gadt:0:1',
        \  't:type names:0:1',
        \  'nt:new types:0:1',
        \  'c:classes:0:1',
        \  'cons:constructors:1:1',
        \  'c_gadt:constructor gadt:1:1',
        \  'c_a:constructor accessors:1:1',
        \  'ft:function types:1:1',
        \  'fi:function implementations:0:1',
        \  'o:others:0:1'
    \ ],
    \ 'sro'        : '.',
    \ 'kind2scope' : {
        \ 'm' : 'module',
        \ 'c' : 'class',
        \ 'd' : 'data',
        \ 't' : 'type'
    \ },
    \ 'scope2kind' : {
        \ 'module' : 'm',
        \ 'class'  : 'c',
        \ 'data'   : 'd',
        \ 'type'   : 't'
    \ }
    \ }

" --- KEY MAPPINGS ---

" Use Space as Leader key
let mapleader=" "

" keep selection active when indenting text
vnoremap < <gv
vnoremap > >gv

" go to the end of the line in insert mode
inoremap <C-e> <Esc>$a

" add empty lines below and above the cursor
nnoremap ]o o<Esc>k
nnoremap [o O<Esc>j
nnoremap ]<CR> o<Esc>
nnoremap [<CR> O<Esc>

" go to next and prev words (containing only word characters)
nnoremap gw :call JumpToNextWord()<Bar>:echo<CR>
nnoremap gb :call JumpToPrevWord()<Bar>:echo<CR>
function! JumpToNextWord()
    normal w
    while strpart(getline('.'), col('.')-1, 1) !~ '\w'
        normal w
    endwhile
endfunction

function! JumpToPrevWord()
    normal b
    while strpart(getline('.'), col('.')-1, 1) !~ '\w'
        normal b
    endwhile
endfunction

" yank to the end of the line
nnoremap Y y$

nnoremap <F8> :TagbarToggle<CR>
nnoremap <F3> :NumbersToggle<CR>

" ALE settings
nmap ]e <Plug>(ale_next_wrap)
nmap [e <Plug>(ale_previous_wrap)
nnoremap <F9> :call ale#Lint()<CR>
nnoremap <F10> :ALEToggle<CR>

" navigate easily through wrapped lines
noremap j gj
noremap k gk

" Remap Esc key to home row
inoremap jk <Esc>
inoremap <Esc> <nop>

" --- Leader key mappings ---

" no highlighting after search
nnoremap <silent> <Leader><Space> :nohlsearch<Bar>:echo<CR>

" show active buffers
" nnoremap <Leader>l :ls<CR>:b<Space>
" Save
nnoremap <Leader>w :w<CR>
" Quit
nnoremap <Leader>q :q<CR>
" delete current buffer, switch to prev. one
nnoremap <Leader>x :bprev<Bar>:bdelete #<CR>
" new tab
nnoremap <Leader>t :tabedit<Space>
" edit file in current window
nnoremap <Leader>o :edit<Space>
" only window
nnoremap <Leader>z <C-w>o
" switch buffers with Tab
nnoremap <Tab> :bnext<CR>
nnoremap <S-Tab> :bprev<CR>

" GitGutter and Fugitive functions (<Leader>v)
nnoremap ]v :GitGutterNextHunk<CR>
nnoremap [v :GitGutterPrevHunk<CR>
nnoremap <Leader>vd :GitGutterPreviewHunk<CR>
nnoremap <Leader>vr :GitGutterUndoHunk<CR>
nnoremap <Leader>vs :GitGutterStageHunk<CR>
nnoremap <Leader>vc :Gstatus<CR>
nnoremap <Leader>vp :Gpush
nnoremap <Leader>vu :Gpull

" search entire word
nnoremap <Leader>/ /\<\><Left><Left>
nnoremap <Leader>? ?\<\><Left><Left>

" Quicker access to system clipboard
nnoremap <Leader>y "+y
nnoremap <Leader>Y "+y$
nnoremap <Leader>p "+p
nnoremap <Leader>P "+P
nnoremap <Leader>d "+d
nnoremap <Leader>D "+D
vnoremap <Leader>y "+y
vnoremap <Leader>p "+p
vnoremap <Leader>d "+d
nnoremap <Leader>c "+c
nnoremap <Leader>C "+C
vnoremap <Leader>c "+c
vnoremap <Leader>C "+C

" next and prev jumps
nnoremap <Leader>, <C-O>
nnoremap <Leader>. <C-I>

" Nerd tree
noremap <Leader>n :NERDTreeToggle<CR>

" for haskell,
" show type of the expression under cursor
autocmd FileType haskell nnoremap <Leader>sp :GhcModType<CR>
" remove highlighting
autocmd FileType haskell nnoremap <Leader><Space> :nohlsearch<CR>:GhcModTypeClear<CR>:echo<CR>

" in visual mode, use v and C-v to expand and shrink selected region
vmap v <Plug>(expand_region_expand)
vmap <C-v> <Plug>(expand_region_shrink)

vnoremap al <Esc>^v$
vnoremap il <Esc>^v$h

" workaround for iTerm, in order for C-Space to work
" imap <nul> <C-Space>
inoremap <C-Space> <C-N>

" start new change on <CR>, <C-W>, <C-U>
inoremap <C-U> <C-G>u<C-U>
" inoremap <C-W> <C-G>u<C-W>
inoremap <CR> <C-G>u<CR>
inoremap <C-d> <Del>

" use Enter key instead of : (Shift-;)
nnoremap <CR> :

vnoremap <CR> :

" End the line with ;
inoremap ;; <Esc>A;<Esc>
" Goto next class definition
nnoremap ]c /\(^\\|\s\)\(class\\|interface\\|trait\\|enum\\|object\)\($\\|\s\)\C<CR>ew:nohlsearch<Bar>:echo<CR>
nnoremap [c ?\(^\\|\s\)\(class\\|interface\\|trait\\|enum\\|object\)\($\\|\s\)\C<CR>ew:nohlsearch<Bar>:echo<CR>

" edit and source config file
noremap <f7> :tabedit $HOME/.vimrc<CR>
noremap <f6> :so $HOME/.vimrc<CR>

" split lines
nnoremap <C-J> a<CR><Esc>k$

" scroll a bit quicker
nnoremap <C-E> 3<C-E>
nnoremap <C-Y> 3<C-Y>

" override system-wide mapping, that treats C-d as Delete
nnoremap <Del> <C-d>
vnoremap <Del> <C-d>

" --- Disable arrow keys ---
noremap <left> <nop>
noremap <right> <nop>
noremap <up> <nop>
noremap <down> <nop>

inoremap <left> <nop>
inoremap <right> <nop>
inoremap <up> <nop>
inoremap <down> <nop>

noremap <S-left> <nop>
noremap <S-right> <nop>
noremap <S-up> <nop>
noremap <S-down> <nop>

inoremap <S-left> <nop>
inoremap <S-right> <nop>
inoremap <S-up> <nop>
inoremap <S-down> <nop>

noremap <home> <nop>
noremap <end> <nop>
noremap <S-home> <nop>
noremap <S-end> <nop>

inoremap <home> <nop>
inoremap <end> <nop>
inoremap <S-home> <nop>
inoremap <S-end> <nop>

noremap <pageup> <nop>
noremap <pagedown> <nop>
noremap <S-pageup> <nop>
noremap <S-pagedown> <nop>

inoremap <pageup> <nop>
inoremap <pagedown> <nop>
inoremap <S-pageup> <nop>
inoremap <S-pagedown> <nop>

noremap <M-left> <nop>
noremap <M-right> <nop>
noremap <M-down> <nop>
noremap <M-up> <nop>

noremap <S-M-left> <nop>
noremap <S-M-right> <nop>
noremap <S-M-down> <nop>
noremap <S-M-up> <nop>