neovim initialization file

init.vim

" Specify a directory for plugins
" - For Neovim: ~/.local/share/nvim/plugged
" - Avoid using standard Vim directory names like 'plugin'
call plug#begin('~/.vim/plugged')



set clipboard=unnamedplus " Use system clipboard
set cursorline            " Highlight the cursor line
set hlsearch
set incsearch
set ignorecase            " Required for proper smartcase functionality
set smartcase             " Case insensitive unless typing with caps
set cursorcolumn
set showcmd
set linebreak
set pastetoggle=<F2>      " Toggle paste mode with F2<Paste>
" See N lines above
set scrolloff=14
set encoding=utf-8
set fileencoding=utf-8
set fileencodings=utf-8
set tabstop     =4
set softtabstop =4
set shiftwidth  =4
set expandtab
set number


"set completeopt=menu,preview,longest,menuone,noselect

set completeopt+=preview,longest
"set completeopt=menu,noinsert,menuone,noselect,preview
"autocmd CompleteDone * silent! pclose!
"Echodoc
set cmdheight=2

Plug 'numirias/semshi', {'do': ':UpdateRemotePlugins'}
Plug 'neoclide/coc.nvim', {'do': 'yarn install --frozen-lockfile'}
Plug 'honza/vim-snippets'
Plug 'roxma/nvim-yarp'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'
Plug 'dhruvasagar/vim-table-mode'
Plug 'szymonmaszke/vimpyter'
Plug 'w0rp/ale'
Plug 'terryma/vim-multiple-cursors'
Plug 'vim-pandoc/vim-pandoc'
Plug 'scrooloose/nerdcommenter'
Plug 'vim-pandoc/vim-pandoc-syntax'
Plug 'gabrielelana/vim-markdown'
Plug 'scrooloose/nerdtree'
Plug 'junegunn/vim-easy-align'
Plug 'tpope/vim-fugitive'
Plug 'heavenshell/vim-pydocstring'
Plug 'lervag/vimtex'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'blueyed/vim-qf_resize'
Plug 'christoomey/vim-tmux-navigator'
Plug 'ryanoasis/vim-devicons'
" Color viewer
Plug 'ap/vim-css-color'
" COLORS
Plug 'morhetz/gruvbox'
Plug 'dracula/vim'
Plug 'kaicataldo/material.vim'
Plug 'ayu-theme/ayu-vim'
Plug 'sonph/onehalf', {'rtp': 'vim/'}
Plug 'rakr/vim-one'

call plug#end()

let g:echodoc_enable_at_startup = 1

let g:ale_completion_enabled = 1


" For conceal markers.
setlocal conceallevel=2

" " Enable true color 启用终端24位色
if exists('+termguicolors')
        " Tmux hacks
    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
    set t_ZH=^[[3m
    set t_ZR=^[[23m
    set termguicolors
endif

set background=dark
colorscheme dracula

" Select all
nmap <C-o> :NERDTreeToggle<CR>

map ; :Buffers<CR>
map <C-p> :Files<CR>
map <C-f> :Lines<CR>
nnoremap <C-Left> :tabprevious<CR>
nnoremap <C-Right> :tabnext<CR>
nnoremap <C-t> :tabnew<CR>

map <Bar> <C-W>v<C-W><Right>
map -     <C-W>s<C-W><Down>


" Delte all whitespaces with F5
nnoremap <silent> <F5> :let _s=@/ <Bar> :%s/\s\+$//e <Bar> :let @/=_s <Bar> :nohl <Bar> :unlet _s <CR>


" Ale specific
let g:ale_fixers = ['autopep8']
autocmd FileType python nmap <leader>= <Plug>(ale_fix)
let g:ale_sign_column_always = 1
" Set this. Airline will handle the rest.
"let g:airline#extensions#ale#enabled = 1
" Only check linting on save
let g:ale_lint_on_text_changed = 'normal'
let g:ale_lint_on_enter = 0

" Start at previous closed line
if has("autocmd")
  au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
    \| exe "normal! g'\"" | endif
endif

" markdown compatible table mode
let g:table_mode_corner='|'

" And pandoc/markdown , rremove conceal
let g:pandoc#syntax#conceal#use =1
" Disable folding
let g:pandoc#modules#disabled = ["folding"]

let g:pandoc#syntax#codeblocks#embeds#langs = ["c", "python", "ruby", "bash"]


let g:UltiSnipsSnippetDirectories=[$HOME.'/.vim/plugged/vim-snippets/UltiSnips', $HOME.'/.vim/plugged/ultisnips/']
let g:ultisnips_python_style= 'google'


"let g:SuperTabDefaultCompletionType = '<C-n>'

" better key bindings for UltiSnipsExpandTrigger
"let g:UltiSnipsExpandTrigger="<tab>"
"let g:UltiSnipsJumpForwardTrigger="<tab>"
"let g:UltiSnipsJumpBackwardTrigger="<s-tab>"
" Pydocstring
nmap <silent> <C-_> <Plug>(pydocstring)
" vimtex related
let g:tex_flavor = 'latex'
" Do not show quickfix on warning
let g:vimtex_quickfix_open_on_warning = 0

" open omni completion menu closing previous if open and opening new menu without changing the text
"inoremap <expr> <C-Space> (pumvisible() ? (col('.') > 1 ? '<Esc>i<Right>' : '<Esc>i') : '') .
            "\ '<C-x><C-o><C-r>=pumvisible() ? "\<lt>C-n>\<lt>C-p>\<lt>Down>" : ""<CR>'
" open user completion menu closing previous if open and opening new menu without changing the text
"inoremap <expr> <S-Space> (pumvisible() ? (col('.') > 1 ? '<Esc>i<Right>' : '<Esc>i') : '') .
            "\ '<C-x><C-u><C-r>=pumvisible() ? "\<lt>C-n>\<lt>C-p>\<lt>Down>" : ""<CR>'


nnoremap <expr> k (v:count == 0 ? 'gk' : 'k')
nnoremap <expr> j (v:count == 0 ? 'gj' : 'j')

"Vimtex compilation
"let g:vimtex_view_general_viewer = 'okular'
let g:vimtex_compiler_latexmk = {
    \ 'options' : [
    \   '-pdf',
    \   '-bibtex',
    \   '-pdflatex="xelatex --shell-escape %O %S"',
    \   '-verbose',
    \   '-file-line-error',
    \   '-synctex=1',
    \   '-interaction=nonstopmode',
    \ ],
    \ 'build_dir': 'build',
    \}


let g:airline_theme='dracula'
let g:airline_powerline_fonts = 1
" Terminal VIM
" ESC
tnoremap <Esc> <C-\><C-n>
" Navigate windows with alt
tnoremap <A-h> <C-\><C-N><C-w>h
tnoremap <A-j> <C-\><C-N><C-w>j
tnoremap <A-k> <C-\><C-N><C-w>k
tnoremap <A-l> <C-\><C-N><C-w>l
inoremap <A-h> <C-\><C-N><C-w>h
inoremap <A-j> <C-\><C-N><C-w>j
inoremap <A-k> <C-\><C-N><C-w>k
inoremap <A-l> <C-\><C-N><C-w>l
nnoremap <A-h> <C-w>h
nnoremap <A-j> <C-w>j
nnoremap <A-k> <C-w>k
nnoremap <A-l> <C-w>l

" Autoinsert on terminal mode
autocmd BufEnter term://* startinsert


" Mapping selecting mappings
nmap <leader><tab> <plug>(fzf-maps-n)
xmap <leader><tab> <plug>(fzf-maps-x)
omap <leader><tab> <plug>(fzf-maps-o)

" Insert mode completion
imap <c-x><c-k> <plug>(fzf-complete-word)
imap <c-x><c-f> <plug>(fzf-complete-path)
imap <c-x><c-j> <plug>(fzf-complete-file-ag)
imap <c-x><c-l> <plug>(fzf-complete-line)

" Advanced customization using autoload functions
inoremap <expr> <c-x><c-k> fzf#vim#complete#word({'left': '15%'})

" COC
"

" if hidden is not set, TextEdit might fail.
set hidden
"
" " Some servers have issues with backup files, see #649
set nobackup
set nowritebackup
" " Use <tab> for select selections ranges, needs server support, like: coc-tsserver, coc-python
nmap <silent> <TAB> <Plug>(coc-range-select)
xmap <silent> <TAB> <Plug>(coc-range-select)
xmap <silent> <S-TAB> <Plug>(coc-range-select-backword)


" always show signcolumns
set signcolumn=yes
"inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm() :
										   "\"\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"


inoremap <silent><expr> <TAB>
      \ pumvisible() ? coc#_select_confirm() :
      \ coc#expandableOrJumpable() ? "\<C-r>=coc#rpc#request('doKeymap', ['snippets-expand-jump',''])\<CR>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()

function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

let g:coc_snippet_next = '<tab>'



" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()


" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
" Coc only does snippet and additional edit on confirm.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

" Use `[c` and `]c` to navigate diagnostics
nmap <silent> [c <Plug>(coc-diagnostic-prev)
nmap <silent> ]c <Plug>(coc-diagnostic-next)

" Remap keys for gotos
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)


" Use K to show documentation in preview window
nnoremap <silent> K :call <SID>show_documentation()<CR>

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')


" Remap for rename current word
nmap <leader>rn <Plug>(coc-rename)

" Remap for format selected region
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
" Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap for do codeAction of current line
nmap <leader>ac  <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Enable mouse
set mouse=a

" Fold settings
set foldmethod=indent
set foldlevel=99
nnoremap <space> za

" nerdcommenter settings
let mapleader=","
set timeout timeoutlen=1500

" when the cursor stay stationery for a while, disable search highlighting
autocmd cursorhold * set nohlsearch

" when searching again, enable highlighting
nnoremap n :set hlsearch<cr>n
nnoremap N :set hlsearch<cr>N  
nnoremap / :set hlsearch<cr>/