init.vim

"""""""""""""""""""""""""""""""""""""""
" Plugins
"""""""""""""""""""""""""""""""""""""""
call plug#begin()
Plug 'junegunn/fzf'
Plug 'junegunn/fzf.vim'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'chrisbra/csv.vim'
Plug 'lervag/vimtex'
Plug 'Townk/vim-autoclose'
Plug 'godlygeek/tabular'
Plug 'plasticboy/vim-markdown'
Plug 'mattn/emmet-vim'
Plug 'sheerun/vim-polyglot'
Plug 'tpope/vim-fugitive'
Plug 'tpope/vim-unimpaired'
Plug 'Chiel92/vim-autoformat'
Plug 'majutsushi/tagbar'
Plug '907th/vim-auto-save'
Plug 'francoiscabrol/ranger.vim'
Plug 'rbgrouleff/bclose.vim'
Plug 'edkolev/tmuxline.vim'
Plug 'dylanaraps/wal.vim'
Plug 'mbbill/undotree'
Plug 'tpope/vim-surround'
Plug 'tpope/vim-git'
Plug 'neoclide/coc-neco'
Plug 'airblade/vim-gitgutter'
Plug 'scrooloose/nerdcommenter'
Plug 'scrooloose/nerdtree'
Plug 'Xuyuanp/nerdtree-git-plugin'

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

call plug#end()


"""""""""""""""""""""""""""""""""""""""
" General
"""""""""""""""""""""""""""""""""""""""
" Sets how many lines of history VIM has to remember
set history=500

" Enable filetype plugins
filetype plugin on
filetype indent on

" Set to auto read when a file is changed from the outside
set autoread

" Colorscheme
colorscheme koehler

" With a map leader it's possible to do extra key combinations
" like <leader>w saves the current file
let mapleader = ","
let g:mapleader = ","

" :W sudo saves the file
" (useful for handling the permission-denied error)
command W w !sudo tee % > /dev/null

" :Q mapped to :q
command Q q

" VIM user interface
" Set 7 lines to the cursor - when moving vertically using j/k
set so=7

" Turn on the WiLd menu
set wildmenu

" Ignore compiled files
set wildignore=*.o,*~,*.pyc
if has("win16") || has("win32")
    set wildignore+=.git\*,.hg\*,.svn\*
else
    set wildignore+=*/.git/*,*/.hg/*,*/.svn/*,*/.DS_Store
endif

" Always show current position
set ruler

" Height of the command bar
set cmdheight=1

" A buffer becomes hidden when it is abandoned
set hid

" Configure backspace so it acts as it should act
set backspace=eol,start,indent
set whichwrap+=<,>,h,l

" Ignore case when searching
set ignorecase

" When searching try to be smart about cases
set smartcase

" Highlight search results
set hlsearch

" Makes search act like search in modern browsers
set incsearch

" Don't redraw while executing macros (good performance config)
set lazyredraw

" For regular expressions turn magic on
set magic

" Show matching brackets when text indicator is over them
set showmatch

" How many tenths of a second to blink when matching brackets
set mat=2

" No annoying sound on errors
set noerrorbells
set novisualbell
set t_vb=
set tm=500

" Properly disable sound on errors on MacVim
if has("gui_macvim")
    autocmd GUIEnter * set vb t_vb=
endif

" Add a bit extra margin to the left
set foldcolumn=1

" Enable syntax highlighting
syntax enable

" Enable 256 colors palette in Gnome Terminal
if $COLORTERM == 'gnome-terminal'
    set t_Co=256
endif

set background=dark

" Set extra options when running in GUI mode
if has("gui_running")
    set guioptions-=T
    set guioptions-=e
    set t_Co=256
    set guitablabel=%M\ %t
endif

" Set utf8 as standard encoding
set encoding=utf8

" Use Unix as the standard file type
set ffs=unix,dos,mac

" Turn backup off, since most stuff is in git etc anyway...
set nobackup
set nowb
set noswapfile

" Use spaces instead of tabs
set expandtab

" Be smart when using tabs
set smarttab

" 1 tab == 4 spaces
set shiftwidth=4
set tabstop=4

" Linebreak on 500 characters
set lbr
set tw=500

set ai
set si
set wrap

" Specify the behavior when switching between buffers
try
    set switchbuf=useopen,usetab,newtab
    set stal=2
catch
endtry

" Return to last edit position when opening files (You want this!)
au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif


"""""""""""""""""""""""""""""""""""""""
" Helper functions
"""""""""""""""""""""""""""""""""""""""
" Delete trailing white space on save, useful for some filetypes ;)
fun! CleanExtraSpaces()
    let save_cursor = getpos(".")
    let old_query = getreg('/')
    silent! %s/\s\+$//e
    call setpos('.', save_cursor)
    call setreg('/', old_query)
endfun

if has("autocmd")
    autocmd BufWritePre *.txt,*.js,*.py,*.wiki,*.sh,*.coffee :call CleanExtraSpaces()
endif

" Returns true if paste mode is enabled
function! HasPaste()
    if &paste
        return 'PASTE MODE  '
    endif
    return ''
endfunction

" Don't close window, when deleting a buffer
command! Bclose call <SID>BufcloseCloseIt()
function! <SID>BufcloseCloseIt()
    let l:currentBufNum = bufnr("%")
    let l:alternateBufNum = bufnr("#")

    if buflisted(l:alternateBufNum)
        buffer #
    else
        bnext
    endif

    if bufnr("%") == l:currentBufNum
        new
    endif

    if buflisted(l:currentBufNum)
        execute("bdelete! ".l:currentBufNum)
    endif
endfunction

autocmd InsertLeave,CompleteDone * if pumvisible() == 0 | pclose | endif

"""""""""""""""""""""""""""""""""""""""
" Misc Maps
"""""""""""""""""""""""""""""""""""""""
nnoremap <silent> <F3> :Autoformat<CR>
nnoremap <F4> :TagbarToggle<cr>
nnoremap <F5> :UndotreeToggle<cr>:UndotreeFocus<cr>
noremap q: <NOP>
noremap q/ <NOP>
noremap q? <NOP>
noremap K <NOP>
noremap <F1> <NOP>
noremap ¬¬ ZZ

" Make s act like d but it doesn't cut the text to a register
nnoremap s "_d
nnoremap ss "_dd
nnoremap S "_D

" Make j and k move by wrapped line, apart from when it'd break things
nnoremap <expr> k (v:count == 0 ? 'gk' : 'k')
nnoremap <expr> j (v:count == 0 ? 'gj' : 'j')

" Remove the Windows ^M - when the encodings gets messed up
noremap <Leader>m mmHmt:%s/<C-V><cr>//ge<cr>'tzt'm

" Toggle paste mode on and off
map <leader>pp :setlocal paste!<cr>

" Move a line of text using CTRL+ALT+[Up/Down]
nmap <c-m-down> mz:m+<cr>`z
nmap <c-m-up> mz:m-2<cr>`z
vmap <c-m-down> :m'>+<cr>`<my`>mzgv`yo`z
vmap <c-m-up> :m'<-2<cr>`>my`<mzgv`yo`z

" Move a line of text using CTRL+ALT+[j/k]
nmap <c-m-j> mz:m+<cr>`z
nmap <c-m-k> mz:m-2<cr>`z
vmap <c-m-j> :m'>+<cr>`<my`>mzgv`yo`z
vmap <c-m-k> :m'<-2<cr>`>my`<mzgv`yo`z

" Remap VIM 0 to first non-blank character
map 0 ^

" Pressing ,ss will toggle and untoggle spell checking
map <leader>ss :setlocal spell!<cr>

" Shortcuts using <leader>
map <leader>sn ]s
map <leader>sp [s
map <leader>sa zg
map <leader>s? z=

" Map <Space> to / (search) and Ctrl-<Space> to ? (backwards search)
map <space> /
map <c-space> ?

" Disable highlight when <leader><cr> is pressed
map <silent> <leader><cr> :noh<cr>

" Make curly brackets nice
inoremap {<cr> {<cr>}<c-o><s-o>

" Smart way to move between windows
map <C-j> <C-W>j
map <C-k> <C-W>k
map <C-h> <C-W>h
map <C-l> <C-W>l

" Close the current buffer
map <leader>bd :Bclose<cr>:tabclose<cr>gT

" Close all the buffers
map <leader>ba :bufdo bd<cr>

" Move between buffers
map <leader>l :bnext<cr>
map <leader>h :bprevious<cr>

" Useful mappings for managing tabs
map <leader>tn :tabnew<cr>
map <leader>to :tabonly<cr>
map <leader>tc :tabclose<cr>
map <leader>tm :tabmove
map <leader>t<leader> :tabnext

" Pressing ,ss will toggle and untoggle spell checking
map <leader>ss :setlocal spell!<cr>

" Let 'tl' toggle between this and the last accessed tab
let g:lasttab = 1
nmap <Leader>tl :exe "tabn ".g:lasttab<CR>
au TabLeave * let g:lasttab = tabpagenr()

" Opens a new tab with the current buffer's path
" Super useful when editing files in the same directory
map <leader>te :tabedit <c-r>=expand("%:p:h")<cr>/

" Switch CWD to the directory of the open buffer
map <leader>cd :cd %:p:h<cr>:pwd<cr>

" Visual mode pressing * or # searches for the current selection
vnoremap <silent> * :<C-u>call VisualSelection('', '')<CR>/<C-R>=@/<CR><CR>
vnoremap <silent> # :<C-u>call VisualSelection('', '')<CR>?<C-R>=@/<CR><CR>

" Fast saving
nmap <leader>w :w!<cr>

"""""""""""""""""""""""""""""""""""""""
" Misc Sets
"""""""""""""""""""""""""""""""""""""""
" Spelllang English
set spelllang=en_gb

" Enable neovim's inccommand feature
set inccommand=nosplit

" Set spellcheck on for *.tex files
au FileType tex setlocal spell

" Autosave
let g:auto_save = 0
augroup ft_latex
    au!
    au FileType tex let b:auto_save = 1
augroup END
let g:auto_save_events = ["InsertLeave", "TextChanged"]


"""""""""""""""""""""""""""""""""""""""
" Plugin Options
"""""""""""""""""""""""""""""""""""""""
" Polyglot
let g:polyglot_disabled = ['py', 'markdown', 'latex'] " Disable polyglot for everything it will conflict on


" Airline
let g:airline_powerline_fonts = 1
let g:airline#extensions#tabline#enabled = 1
let g:airline_theme='badwolf'
let g:airline#extensions#ale#enabled = 1

let g:airline_section_error = '%{airline#util#wrap(airline#extensions#coc#get_error(),0)}'
let g:airline_section_warning = '%{airline#util#wrap(airline#extensions#coc#get_warning(),0)}'

" Coc.nvim
inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm() : "\<C-g>u\<CR>"

" Vim-markdown
let g:vim_markdown_folding_disabled = 1
set conceallevel=2
let g:tex_conceal = ""
let g:vim_markdown_math = 1
let g:vim_markdown_strikethrough = 1
filetype plugin on

" Vimtex
let g:vimtex_compiler_progname = 'nvr'
let g:tex_flavor = 'latex'
let g:vimtex_view_method = 'zathura'
let g:vimtex_compiler_latexmk = {
            \ 'backend' : 'nvim',
            \ 'background' : 1,
            \ 'build_dir' : '/tmp/latex',
            \ 'callback' : 1,
            \ 'continuous' : 1,
            \ 'executable' : 'latexmk',
            \ 'options' : [
            \   '-verbose',
            \   '-file-line-error',
            \   '-synctex=1',
            \   '-interaction=nonstopmode',
            \ ],
            \}
let g:Tex_IgnoredWarnings =
            \'Underfull'."\n".
            \'Overfull'."\n".
            \'specifier changed to'."\n".
            \'You have requested'."\n".
            \'Missing number, treated as zero.'."\n".
            \'There were undefined references'."\n".
            \'Citation %.%# undefined'."\n".
            \'Double space found.'."\n"
let g:Tex_IgnoreLevel = 8

" Autoformat
let g:formatdef_my_custom_c = '"astyle --mode=c -A2 -F -xg -H -U -xe -k1 -W1 -xb -xf -xh -c -xp -p -C -S -N 2>/dev/null"'
let g:formatdef_my_custom_java = '"astyle --mode=java -A2 -F -xg -H -U -xe -k1 -W3 -xb -xf -xh -c -xp -p -C -S -N 2>/dev/null"'
let g:formatters_c = ['my_custom_c']
let g:formatters_cpp = ['my_custom_c']
let g:formatters_java = ['my_custom_java']

" Ranger.vim
let g:ranger_replace_netrw = 1

""" NERDTree
let g:NERDTreeIndicatorMapCustom = {
            \ "Modified"  : "M",
            \ "Staged"    : "+",
            \ "Untracked" : "N",
            \ "Renamed"   : "R",
            \ "Unmerged"  : "=",
            \ "Deleted"   : "D",
            \ "Dirty"     : "✗",
            \ "Clean"     : "✔︎",
            \ 'Ignored'   : 'i',
            \ "Unknown"   : "?"
            \ }