snippets/nvim-config/init.vim

call plug#begin('~/.local/share/nvim/site/plugged')

" airline
Plug 'https://github.com/bling/vim-airline.git'
Plug 'vim-airline/vim-airline-themes'
" git
Plug 'https://github.com/tpope/vim-fugitive.git'
" Shougos UI-Plugin
Plug 'Shougo/denite.nvim'
" Plug 'roxma/nvim-completion-manager'
" showing function-signatures/doc on completion
Plug 'Shougo/echodoc.vim'
" Tab-Completion
" Plug 'ervandew/supertab'

" vim-sourround
Plug 'https://github.com/tpope/vim-surround.git'
" theme
Plug 'https://github.com/morhetz/gruvbox.git'
Plug 'frankier/neovim-colors-solarized-truecolor-only'

" rainbow-parentethies
Plug 'luochen1990/rainbow'
" search in files/buffers for filenames - replaced by fzf
" Plug 'https://github.com/ctrlpvim/ctrlp.vim.git'
" fuzzy finder
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'

" show buffers in statusline
" Plug 'bling/vim-bufferline'
" git-gutter (little + - and ~ left)
Plug 'https://github.com/airblade/vim-gitgutter.git'

" apply hlint-suggestions
" Plug 'https://github.com/mpickering/hlint-refactor-vim.git'

" Tabular
Plug 'https://github.com/godlygeek/tabular.git'

" Shakespearian template-highlighting
" Plug 'https://github.com/pbrisbin/vim-syntax-shakespeare.git'

" Multiline-Comments
Plug 'tomtom/tcomment_vim'

" Auto-Formatting
Plug 'Chiel92/vim-autoformat'

" show colors (#abc) with that background-color
Plug 'ap/vim-css-color'

" multiline-stuff
Plug 'terryma/vim-multiple-cursors'

" Icons
Plug 'ryanoasis/vim-devicons'

" Markdown-Support
Plug 'plasticboy/vim-markdown'
Plug 'dhruvasagar/vim-table-mode'
Plug 'suan/vim-instant-markdown'

" Code-Folds
Plug 'tmhedberg/SimpylFold'

" better closing
Plug 'mhinz/vim-sayonara'

" Session-Management
Plug 'xolox/vim-session' | Plug 'xolox/vim-misc'

" CoC
Plug 'neoclide/coc.nvim', {'branch': 'release'}

call plug#end()


" SETTINGS

" recommended by syntastic
" set statusline+=%#warningmsg#
" set statusline+=%{SyntasticStatuslineFlag()}
" set statusline+=%*
" set statusline+=%{fugitive#statusline()}
"
" let g:syntastic_always_populate_loc_list = 1
" let g:syntastic_auto_loc_list = 1
" let g:syntastic_check_on_open = 1
" let g:syntastic_check_on_wq = 0
" use autocompletion
let g:deoplete#enable_at_startup = 1
" in case of problems with stack..
" g:necoghc_use_stack = 1

" set leader to space
let mapleader= "\<SPACE>"

" autocmd InsertEnter * :set number
" autocmd InsertEnter * :set norelativenumber
" autocmd InsertLeave * :set relativenumber
" autocmd InsertLeave * :set nonumber
set relativenumber
set number

set shiftwidth=2
set tabstop=2

" show cmd - especially leader
set showcmd
" expand tabs with spaces
set expandtab

" Tell Vim which characters to show for expanded TABs,
" trailing whitespace, and end-of-lines. VERY useful!
if &listchars ==# 'eol:$'
  set listchars=tab:>\ ,trail:-,extends:>,precedes:<,nbsp:+
endif
set list                " Show problematic characters.

" Also highlight all tabs and trailing whitespace characters.
highlight ExtraWhitespace ctermbg=darkgreen guibg=darkgreen
match ExtraWhitespace /\s\+$\|\t/

set hlsearch            " Highlight search results.
set ignorecase          " Make searching case insensitive
set smartcase           " ... unless the query has capital letters.
set incsearch           " Incremental search.
set gdefault            " Use 'g' flag by default with :s/foo/bar/.
set magic               " Use 'magic' patterns (extended regular expressions).
"set inccommand=nosplit  " Use live-preview of search/replace etc.
set conceallevel=2      " Allow things to be visually opressed (i.e. *foo* be italic)
set mouse=a             " enable mouse
set foldenable          " enable folding

set undofile            " enable undo over sessions
set undodir="$HOME/.VIM_UNDO_FILES" " save in this path
set laststatus=3 " only 1 statusline, not 1 per window
highlight WinSeperator guibg=None

set hidden

" Use <C-L> to clear the highlighting of :set hlsearch.
if maparg('<C-L>', 'n') ==# ''
  nnoremap <silent> <C-L> :nohlsearch<CR><C-L>
endif

" Remember cursor position between vim sessions
  autocmd BufReadPost *
              \ if line("'\"") > 0 && line ("'\"") <= line("$") |
              \   exe "normal! g'\"" |
              \ endif
              " center buffer around cursor when opening files
  autocmd BufRead * normal zz


"" KEY-BINDINGS

" use <TAB> to fold/unfold

nnoremap <TAB> za

" <Tab>: completion
function! CheckBackSpace() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1] =~ '\s'
endfunction
inoremap <silent><expr> <Tab>
    \ pumvisible() ? "\<C-N>" :
    \ CheckBackSpace() ? "\<Tab>" :
    \ coc#refresh()
" <S-Tab>: completion back
inoremap <silent><expr> <S-Tab> pumvisible() ? "\<C-P>" : "\<C-H>"
" <CR>: confirm completion, or insert <CR>
inoremap <expr> <CR> pumvisible() ? "\<C-Y>" : "\<CR>"

" use <C-J> to Jump to definition instead of <C-]> (default)
nnoremap <C-J> <C-]>

" c-d to delete line in insert-mode
inoremap <C-D> <esc>ddi

" exit terminal-mode

tnoremap <C-t><C-t> <C-\><C-n>

" autoformat code if possible (read docs on vim-autoformat!)
noremap <leader>f :Autoformat<CR>
noremap <leader>TM :TableModeToggle<CR>

" multi-cursor
let g:multi_cursor_next_key='<C-n>'
let g:multi_cursor_prev_key='<C-p>'
let g:multi_cursor_skip_key='<C-x>'
let g:multi_cursor_quit_key='<Esc>'

" Align blocks of text and keep them selected
vmap < <gv
vmap > >gv
nnoremap <leader>d "_d
vnoremap <leader>d "_d

" toggle comments
vnoremap <leader>/ :TComment<cr>

" Open file menu
nnoremap <Leader>o :Files<CR>
" Open buffer menu
nnoremap <Leader>b :Buffers<CR>
" Open most recently used files
nnoremap <Leader>f :GFiles<CR>
" Open Tag-Search
nnoremap <Leader>t :Tags<CR>

" Open File-Tree on left side
nmap <C-t> :NERDTreeToggle<CR>

" Expand patterns in Haskell
"nnoremap <Leader>hc :GhcModSplitFunCase<CR>
" Expand function signatures in Haskell
"nnoremap <Leader>hs :GhcModSigCodegen<CR>
" Get Type-Info under Cursor
"nnoremap <Leader>ht :GhcModType<CR>

" " Copy to clipboard
vnoremap  <leader>y  "+y
nnoremap  <leader>Y  "+yg_
nnoremap  <leader>y  "+y
nnoremap  <leader>yy  "+yy

" " Paste from clipboard
nnoremap <leader>p "+p
nnoremap <leader>P "+P
vnoremap <leader>p "+p
vnoremap <leader>P "+P

" disable syntastic for haskell
let g:syntastic_haskell_checkers=['']

" Clear stuff
nnoremap <Leader><Leader> :nohlsearch<CR>:cclose<CR>

" THEME-RELATED STUFF

syntax enable
" enable true color
set termguicolors
" enable italics, load colorscheme
let g:gruvbox_italic=1
set background=dark
colorscheme gruvbox

let g:rainbow_active = 1
let &colorcolumn="80,".join(range(120,200),",")

" spell checking for markdown
autocmd BufRead,BufNewFile *.md setlocal spell complete+=kspell textwidth=80
autocmd BufRead,BufNewFile *.markdown setlocal spell complete+=kspell textwidth=80
autocmd BufRead,BufNewFile *.md hi SpellBad guibg=#582828 gui=none
autocmd BufRead,BufNewFile *.markdown hi SpellBad guibg=#582828 gui=none
autocmd FileType markdown nnoremap <Leader>t :Toc<CR>

" set languages to english and german
set spelllang=de_de,en_us

let g:vim_markdown_toc_autofit = 1
let g:vim_markdown_emphasis_multiline = 1
let g:vim_markdown_math = 1
let g:vim_markdown_new_list_item_indent = 2
let g:vim_markdown_folding_level = 6

" disable instant-markdown-preview
let g:instant_markdown_autostart = 0
au FileType markdown setl shell=bash

let g:haskell_enable_quantification   = 1 " enable highlighting of forall
let g:haskell_enable_recursivedo      = 1 " enable highlighting of mdo and rec
let g:haskell_enable_arrowsyntax      = 1 " enable highlighting of proc
let g:haskell_enable_pattern_synonyms = 1 " enable highlighting of pattern
let g:haskell_enable_typeroles        = 1 " enable highlighting of type roles
let g:haskell_enable_static_pointers  = 1 " enable highlighting of static
let g:haskell_indent_if               = 3
let g:haskell_indent_case             = 2
let g:haskell_indent_let              = 4
let g:haskell_indent_where            = 6
let g:haskell_indent_do               = 3
let g:haskell_indent_in               = 1
let g:haskell_indent_guard            = 2

" NERDTREE
map <C-t> :NERDTreeToggle<CR>
autocmd StdinReadPre * let s:std_in=1
let NERDTreeShowHidden=1
let g:NERDTreeWinSize=45
let g:NERDTreeAutoDeleteBuffer=1

function! NERDTreeHighlightFile(extension, fg, bg, guifg, guibg)
exec 'autocmd FileType nerdtree highlight ' . a:extension .' ctermbg='. a:bg .' ctermfg='. a:fg .' guibg='. a:guibg .' guifg='. a:guifg
exec 'autocmd FileType nerdtree syn match ' . a:extension .' #^\s\+.*'. a:extension .'$#'
endfunction

call NERDTreeHighlightFile('jade', 'green', 'none', 'green', '#141e23')
call NERDTreeHighlightFile('ini', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('md', 'blue', 'none', '#3366FF', '#141e23')
call NERDTreeHighlightFile('yml', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('config', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('conf', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('json', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('html', 'yellow', 'none', 'yellow', '#141e23')
call NERDTreeHighlightFile('styl', 'cyan', 'none', 'cyan', '#141e23')
call NERDTreeHighlightFile('css', 'cyan', 'none', 'cyan', '#141e23')
call NERDTreeHighlightFile('coffee', 'Red', 'none', 'red', '#141e23')
call NERDTreeHighlightFile('js', 'Red', 'none', '#ffa500', '#141e23')
call NERDTreeHighlightFile('ts', 'Blue', 'none', '#6699cc', '#141e23')
call NERDTreeHighlightFile('hs', 'Blue', 'none', '#6699cc', '#141e23')
call NERDTreeHighlightFile('php', 'Magenta', 'none', '#ff00ff', '#141e23')
call NERDTreeHighlightFile('ds_store', 'Gray', 'none', '#686868', '#141e23')
call NERDTreeHighlightFile('gitconfig', 'Gray', 'none', '#686868', '#141e23')
call NERDTreeHighlightFile('gitignore', 'Gray', 'none', '#686868', '#141e23')
call NERDTreeHighlightFile('bashrc', 'Gray', 'none', '#686868', '#141e23')
call NERDTreeHighlightFile('bashprofile', 'Gray', 'none', '#686868', '#141e23')

" SNIPPETS

" " Emmet customization
" " Enable Emmet in all modes
" " Remapping <C-y>, just doesn't cut it.
"   function! s:expand_html_tab()
" " try to determine if we're within quotes or tags.
" " if so, assume we're in an emmet fill area.
"    let line = getline('.')
"    if col('.') < len(line)
"      let line = matchstr(line, '[">][^<"]*\%'.col('.').'c[^>"]*[<"]')
"      if len(line) >= 2
"         return "\<C-n>"
"      endif
"    endif
" " expand anything emmet thinks is expandable.
"   if emmet#isExpandable()
"     return "\<C-y>,"
"   endif
" " return a regular tab character
"   return "\<tab>"
"   endfunction
"   autocmd FileType html,markdown imap <buffer><expr><tab> <sid>expand_html_tab()
"   let g:user_emmet_mode='a'
"   let g:user_emmet_complete_tag = 1
"   let g:user_emmet_install_global = 0
"   autocmd FileType html,css EmmetInstall

" AIRLINE
let g:airline#extensions#tabline#ignore_bufadd_pat = 'gundo|undotree|vimfiler|tagbar|nerd_tree|startify|!'
let g:airline#extensions#tabline#enabled = 1
set hidden
let g:airline#extensions#tabline#fnamemod = ':t'
let g:airline#extensions#tabline#show_tab_nr = 1
let g:airline_powerline_fonts = 1
let g:airline_theme='understated'
" let g:airline_theme='base16_solarized'
cnoreabbrev <expr> x getcmdtype() == ":" && getcmdline() == 'x' ? 'Sayonara' : 'x'
nmap <leader>tt :term<cr>
nmap <leader>, :bnext<CR>
nmap <leader>. :bprevious<CR>
let g:airline#extensions#tabline#buffer_idx_mode = 1
nmap <leader>1 <Plug>AirlineSelectTab1
nmap <leader>2 <Plug>AirlineSelectTab2
nmap <leader>3 <Plug>AirlineSelectTab3
nmap <leader>4 <Plug>AirlineSelectTab4
nmap <leader>5 <Plug>AirlineSelectTab5
nmap <leader>6 <Plug>AirlineSelectTab6
nmap <leader>7 <Plug>AirlineSelectTab7
nmap <leader>8 <Plug>AirlineSelectTab8
nmap <leader>9 <Plug>AirlineSelectTab9
set guifont=Sauce\ Code\ Pro\ Nerd\ Font\ Complete:h13

" TABULARIZE

nmap <leader>t: :Tabularize /:: /l1c0l0<CR>
nmap <leader>t= :Tabularize /= /l1c0l0<CR>
nmap <leader>tp :Tabularize /\| /l1c0l0<CR>
nmap <leader>t, :Tabularize /, /l1c0l0<CR>

" Table mode

let g:table_mode_corner_corner="+"
let g:table_mode_header_fillchar="="

" Move between windows
nnoremap <M-Left>  <C-W><C-H>
nnoremap <M-Down>  <C-W><C-J>
nnoremap <M-Up>    <C-W><C-K>
nnoremap <M-Right> <C-W><C-L>
" Move between tabs
nnoremap <M-Home>  :bNext<CR>
nnoremap <M-End>   :bnext<CR>

" Session-Options

let g:session_autoload='yes'
let g:session_autosave='yes'

" Change background quickly
nmap <F9> :let &background = ( &background == "dark" ? "light" : "dark" )<CR>

" BUGFIX UNTIL #6997 gets meged.
set guicursor=