vimrc

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

Plug 'vim-scripts/sudo.vim'
Plug 'bronson/vim-trailing-whitespace', { 'on': 'FixWhitespace' }
Plug 'rking/ag.vim'
Plug 'easymotion/vim-easymotion'
Plug 'deris/vim-gothrough-jk'
Plug 'vim-scripts/surround.vim'
Plug 'scrooloose/nerdcommenter'
Plug 'https://github.com/itchyny/lightline.vim'
Plug 'https://github.com/Shougo/vimproc', { 'do': 'make' }
Plug 'https://github.com/Shougo/neomru.vim'
Plug 'vim-scripts/The-NERD-tree', { 'on': 'NERDTree' }
Plug 'vim-scripts/desert256.vim'
Plug 'morhetz/gruvbox'
Plug 'https://github.com/airblade/vim-gitgutter'
Plug 'tpope/vim-fugitive'

" LSP
Plug 'prabirshrestha/async.vim'
Plug 'prabirshrestha/asyncomplete.vim'
Plug 'prabirshrestha/asyncomplete-lsp.vim'
Plug 'prabirshrestha/vim-lsp'
Plug 'mattn/vim-lsp-settings'

" Syntaxes
Plug 'leshill/vim-json', { 'for': 'json' }
Plug 'tpope/vim-haml', { 'for': 'haml' }
" Plug 'othree/html5.vim', { 'for': 'html' }
" Plug 'cakebaker/scss-syntax.vim', { 'for': 'scss' }
Plug 'othree/yajs.vim', { 'for': 'javascript' }
Plug 'maxmellon/vim-jsx-pretty', { 'for': 'javascript' }
Plug 'plasticboy/vim-markdown', { 'for': 'markdown' }
Plug 'cespare/vim-toml', { 'for': 'toml' }
" Plug 'JulesWang/css.vim', { 'for': 'css' }
Plug 'hail2u/vim-css3-syntax', { 'for': 'css' }

" Initialize plugin system
call plug#end()


" ========================= "
"      General settings     "
" ========================= "
scriptencoding utf-8
set tabstop=2 shiftwidth=2 softtabstop=2
set fencs=utf-8,euc-jp,iso-2022-jp,cp932
set matchpairs+=<:>
set whichwrap+=h,l,<,>,[,],b,s,~
set autoindent
set autoread
set ambiwidth=double
set expandtab
set notitle
set number
set incsearch
set hlsearch
set ignorecase
set smartcase
set clipboard=unnamed
set ruler
set noswapfile
set nowrap
set confirm
set title
set ttyfast
set cursorline
set showmatch
set showcmd
set splitright
set laststatus=2
set encoding=utf-8
set fileencoding=utf-8
set fileencodings=utf-8,iso-2022-jp,euc-jp,sjis
set fileformats=unix,dos,mac
set backspace=indent,eol,start
set completeopt=menu,preview
set updatetime=100
set relativenumber
syntax on
"silent! colorscheme desert256
"set background=light
silent! colorscheme gruvbox
filetype on

autocmd BufEnter * silent! lcd %:p:h

" Maps leader key
let mapleader=","

" Prevent performance slow-down with long line
set synmaxcol=200

" Remove 'thank you for flying vim'
let &titleold=getcwd()


" ========================== "
"     Filetype detection     "
" ========================== "
au BufRead,BufNewFile,BufReadPost *.erb set filetype=eruby.html
au BufRead,BufNewFile,BufReadPost {*.ts,*.tsx} set filetype=typescript
au BufRead,BufNewFile,BufReadPost *.elm set filetype=elm
au BufRead,BufNewFile,BufReadPost *.toml set filetype=toml
au BufRead,BufNewFile {COMMIT_EDITMSG} set filetype=gitcommit
au BufRead,BufNewFile {.envrc,_bash*} set filetype=sh

" Special tab/indent width
au FileType c,cpp,go,python,elm set tabstop=4 shiftwidth=4 softtabstop=4
au FileType c,cpp set cindent

" Check files' modifiction more frequently
augroup checktime
  autocmd!
  autocmd WinEnter * checktime
augroup END

" Trim whitespace before saving a file except markdown
au BufWritePre *\({*.md}\)\@<! :FixWhitespace

nnoremap <silent>,tr :NERDTree<CR>
nnoremap <F7> :Errors<CR>
nnoremap <F8> :make<CR>

command VIMRC edit $MYVIMRC
command Encutf8 :e ++enc=utf8
command Sudow :w sudo:%
command Sudoe :e sudo:%

" Command to update tabs to spaces
command ChangeTab2Space :call s:change_tab_function()
function s:change_tab_function()
  set expandtab
  retab
endfunction

" =============================== "
"     Customized key mappings     "
" =============================== "
nnoremap <C-t> :tabnew<CR>
nnoremap <C-m> :tabn<CR>
nnoremap <C-n> :tabp<CR>
nnoremap <C-x> :q<CR>

" Quick horizontal key manueuvers
nmap <silent><C-h> b
nmap <silent><C-l> w
vmap <silent><C-h> b
vmap <silent><C-l> w

" Fix strange behavior of Backspace
inoremap <expr><BS> "\<C-h>"

" Visual mode key-mappings for multiple indents
vnoremap > >gv
vnoremap < <gv

" Resets highlighting
nnoremap <silent> <Esc><Esc> :noh<CR> :call clearmatches()<CR>

" Block opening command history.
" It is triggered off mistakenly when using :q
nnoremap q: <NOP>

" It applies ordinary Windows key binding for undo
" On the default setting, Vim has Ctrl-Z for temporary quitting
" with shell control system, but it is not actually useful.
" nnoremap <silent>u <NOP>
" nnoremap <silent><C-z> <NOP>
" nnoremap <silent><C-z> :undo<CR>

" Stop opening split windows with Ctrl+w+n
" to block bumping with GNU screen keybinding to change windows
nnoremap <C-w><C-n> <NOP>

" Disable dot action
nnoremap . <NOP>

" Shift-free command mode in US layout
nmap ; :

" ================= "
"      vim-lsp      "
" ================= "
let g:lsp_diagnostics_float_delay = 1000
let g:lsp_diagnostics_echo_delay = 1000
let g:lsp_documentation_float = 0
let g:lsp_settings = {
\   'elm-language-server': {
\     'initialization_options': {
\       'elmPath': './node_modules/.bin/elm',
\       'elmFormatPath': './node_modules/.bin/elm-format',
\       'elmTestPath': './node_modules/.bin/elm-test'
\     }
\   }
\ }
au BufWritePre {*.go,*.elm,*.ts,*.js} :LspDocumentFormatSync
" nnoremap <leader>df :vert LspDefinition<CR>
" nnoremap <leader>tt :tab LspDefinition<CR>
" nnoremap <leader>ee :LspDocumentDiagnostics<CR>

function! s:on_lsp_buffer_enabled() abort
    setlocal omnifunc=lsp#complete
    setlocal signcolumn=yes
    if exists('+tagfunc') | setlocal tagfunc=lsp#tagfunc | endif
    nmap <buffer> gd <plug>(lsp-definition)
    nmap <buffer> gr <plug>(lsp-references)
    nmap <buffer> gi <plug>(lsp-implementation)
    nmap <buffer> gt <plug>(lsp-type-definition)
    nmap <buffer> <leader>rn <plug>(lsp-rename)
    nmap <buffer> [g <Plug>(lsp-previous-diagnostic)
    nmap <buffer> ]g <Plug>(lsp-next-diagnostic)
    nmap <buffer> K <plug>(lsp-hover)

    " refer to doc to add more commands
endfunction

" ====================== "
"      asyncomplete      "
" ====================== "
let g:asyncomplete_popup_delay = 150
let g:asyncomplete_auto_popup = 0
set pumheight=30
inoremap <expr><CR>  pumvisible() ? "<C-y>" : "<CR>"
inoremap <expr><C-j> pumvisible() ? "<Down>" : "<C-j>"
inoremap <expr><C-k> pumvisible() ? "<Up>" : "<C-k>"
inoremap <expr><C-u> pumvisible() ? "<Up><Up><Up><Up><Up>" : "<C-u>"
inoremap <expr><C-d> pumvisible() ? "<Down><Down><Down><Down><Down>" : "<C-d>"
inoremap <expr><C-h> pumvisible() ? asyncomplete#cancel_popup() : "<C-h>"
inoremap <expr><C-c> pumvisible() ? asyncomplete#cancel_popup() : "<C-c>"
" Completion triggers (when CTRL-L or a period typed)
inoremap <expr><C-l> pumvisible() ? asyncomplete#close_popup() : asyncomplete#force_refresh()
imap . .<Plug>(asyncomplete_force_refresh)

" ========================== "
"     Lightline settings     "
" ========================== "
if !has('gui_running')
  set t_Co=256
endif
let g:lightline = {
\   'colorscheme': 'one',
\   'active': {
\     'left': [
\       ['mode', 'paste'],
\       ['readonly', 'filename', 'modified']
\     ],
\     'right': [
\       ['lineinfo'],
\       ['fileformat', 'fileencoding', 'filetype']
\     ]
\   },
\   'component': {
\     'fugitive': '%{exists("*fugitive#head") ? "<".fugitive#head().">" : ""}',
\     'readonly': '%{&readonly ? "[LOCKED]" : ""}',
\   }
\ }

" ============================= "
"      Git plugin settings      "
" ============================= "
let g:git_command_edit = 'rightbelow vnew'
nnoremap <silent>,gg :GitGutterToggle<CR>
nnoremap <silent>,gh :GitGutterLineHighlightsToggle<CR>
nnoremap <silent>,gl :GV!<CR>

" ======================= "
"  Settings for Markdown  "
" ======================= "
let g:vim_markdown_folding_disabled = 1

" =========================== "
"   Settings for easymotion   "
" =========================== "
let g:EasyMotion_keys = 'hjklasdfgyuiopqwertnmzxcvbHJKLASDFGYUIOPQWERTNMZXCVB'
let g:EasyMotion_do_mapping = 0
let g:EasyMotion_smartcase = 1
nmap <C-j> <Plug>(easymotion-s2)
nmap <C-k> <Plug>(easymotion-s2)
hi EasyMotionShade ctermbg=none ctermfg=blue

" ================= "
"   NeedCommenter   "
" ================= "
let g:NERDSpaceDelims = 1

" ==================== "
"   vim-gothrough-jk   "
" ==================== "
let g:go_through_jk_reset_interval = 2000
let g:go_through_jk_move_count = 5

" ================= "
"     Highlight     "
" ================= "
" Enable background transparency on Ubuntu. these highlight settings needs to be here.
" highlight Normal ctermbg=none
" highlight NonText ctermbg=none
"