vimrc (using vimplug)

vimrc

set nocompatible  " be iMproved, required

" vim-plug, see https://github.com/junegunn/vim-plug
call plug#begin('~/.vim/plugged')

" plugins
Plug 'tpope/vim-sensible'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-surround'
Plug 'tpope/vim-repeat'
Plug 'tpope/vim-fugitive'
Plug 'skywind3000/asyncrun.vim'
Plug 'nanotech/jellybeans.vim'
Plug 'majutsushi/tagbar'
Plug 'w0rp/ale'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/goyo.vim'  " write mode
" Plug 'junegunn/limelight.vim'  " spotlight on cursorline
Plug 'mileszs/ack.vim'
Plug 'SirVer/ultisnips' | Plug 'honza/vim-snippets'
Plug 'sheerun/vim-polyglot'
Plug 'tmhedberg/SimpylFold'  " for python
Plug 'matze/vim-tex-fold'
Plug 'akaron/vim-markdown-fold'
Plug '~/.vim/my_plug/vim-tex-sync-skim'
" Plug 'Yggdroot/indentLine'

" plugins considering alternatives or just to keep in mind
Plug 'vim-airline/vim-airline'  " alt.: lightline; manually build statusline (see below)
" Plug 'junegunn/fzf.vim'  " the :FZF is enough
" Plug 'tpope/vim-jdaddy'  " for json
" Plug 'tpope/vim-unimpaired'  " define some paired key-bindings

" load plugin for specific filetypes. It does not prevent plugins from activing
" while open other filetypes in another buffers
Plug 'vim-scripts/restore_view.vim', { 'for': ['python', 'tex', 'html', 'htmldjango'] }

" end of vimplug settings, below are other vimrc settings
call plug#end()


"
" ==== Basic settings ====
"
" some settings are in vim-sensible plugin
syntax on
set showcmd		" Show (partial) command in status line.
set number              " or 'relativenumber'
set cursorline
set hlsearch
set showmode
set wildmenu
set wildchar=<TAB>      " start wild expansion in the command line using <TAB>
set wildignore=*.o,*.class,*.pyc
set wildignore+=*.so,*.swp,*.zip     " MacOSX/Linux
set nobackup            " no *~ backup files
set copyindent          " copy the previous indentation on autoindenting
set smartcase           " ignore case if search pattern is all lowercase,case-sensitive otherwise
set noerrorbells
"set textwidth=90

set nomodeline          " in rare case it cause problem. Turn it off since and I never use it
" set clipboard=unnamed   " use system clipboard from unnamed register
" Note: instead of 'set clipboard=unnamed', one can access system clipboard via register
" '"*' (without ''). For example, '"*yy' to copy current line into clipboard or '"*p' to
" paste from clipboard.

" useful when open multiple buffers
set hidden          "avoid 'No write since last change' while :bn or :bp
set confirm         "avoid close un-saved (hidden) buffer

" TAB settings
set expandtab        "replace <TAB> with spaces
set softtabstop=4
set shiftwidth=4
au FileType Makefile set noexpandtab
au FileType snippet set noexpandtab

" jump to the last position when reopening a file
augroup reopen
    autocmd!
    au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
augroup END


"
" ==== filetype specific settings ====
"
" add ':' to keyword for auto-completion (so that I can find the word like
" 'Smith:2006dh' in bibtex file and auto-complete it in latex file)
augroup tex
    autocmd!
    autocmd FileType tex,bib setlocal iskeyword+=:
augroup END

" vim may recognize tex file as 'plaintex' flavor instead of 'latex', this cause
" problems in packages which only work on 'latex'. (options: plain/context/latex)
let g:tex_flavor='latex'


"
" ==== Theme/color/fonts ====
" theme-variables has to be configured before using the colorscheme
"
let g:jellybeans_use_term_background_color=1
colors jellybeans

if has('gui_running')
    set vb  " visual bell
    "set linespace=1  " looks better for some fonts
    set guifont=Dejavu\ Sans\ Mono\ for\ Powerline:h18

    " remove scrollbars on the right and on the left
    set guioptions-=R
    set guioptions-=L
endif

" ex: visualize the 80th column
"if (exists('+colorcolumn'))
"    set colorcolumn=80
"    highlight ColorColumn ctermbg=7
"endif

" GNU screen
if match($TERM, "screen")!=-1
    set term=xterm-256color
endif


" statusline
" ==========
" vim-airline or not?
" airline is not bad if turn off almost all extensions except tabline
" For status line, see:
" https://gist.github.com/akaron/1a989f0b79915e29c3d38774a63204a0/016c44eb348a43e5bd4eda638589e121222011ff#file-vimrc-L41 (also L146-183)
" https://github.com/sodiumjoe/dotfiles/blob/master/vimrc


"
" ==== key bindings ====
"
let mapleader = "\<Space>"
inoremap jk <Esc>
nnoremap <leader>bb :ls<CR>:b
nnoremap <leader>bn :bnext<CR>
nnoremap <leader>bp :bprev<CR>
nnoremap <leader>bd :bdelete<CR>
nnoremap <leader>g :Goyo<CR>
nnoremap <leader>T :TagbarToggle<CR>
nnoremap <c-p> :FZF<cr>

" from vim-tex-sync-skim
nnoremap <leader>v :call SynctexShow()<CR>

" toggle quickfix window the `right' way (better than :copen), see
" https://github.com/skywind3000/asyncrun.vim/wiki/Quickfix-Best-Practice
nnoremap <leader>q :call asyncrun#quickfix_toggle(8)<CR>

" For a single latex file, one may use the following:
" nnoremap <leader>l :!latexmk -pdf %<CR>
" nnoremap <leader>v :silent !/Applications/Skim.app/Contents/SharedSupport/displayline <C-r>=line('.')<CR> %<.pdf %<CR><C-L>

" make these repeatable (need vim-repeat plugin)
silent! call repeat#set("\<Plug>(ale_previous_wraptab)", v:count)
silent! call repeat#set("\<Plug>(ale_next_wrap)", v:count)

"
" ==== compile and run ====
"
" noremap <F5> :w<CR>:AsyncRun make<CR>
" the following are inspired by https://www.zhihu.com/question/20271508#answer-47185463
" also see https://zhuanlan.zhihu.com/p/30022074
noremap <F5> :call CompileRunGcc()<CR>
func! CompileRunGcc()
    exec "w"
    if &filetype == 'c'
        exec "!g++ % -o %<"
        exec "!time ./%<"
    elseif &filetype == 'cpp'
        exec "!g++ % -o %<"
        exec "!time ./%<"
    elseif &filetype == 'sh'
        exec "!time bash %"
    elseif &filetype == 'python'
        exec "AsyncRun python %"
    elseif &filetype == 'html'
        exec "!firefox % &"
    elseif &filetype == 'markdown'
        exec "!pandoc -t html % -o %.html &"
        exec "!open %.html &"
    elseif &filetype == 'tex'
        " use AsyncRun + Makefile to typeset
        exec "AsyncRun make"
    endif
endfunc

"
" ==== Plugins specific settings ====
"

" Tell ack.vim to use ag (the Silver Searcher) instead
let g:ackprg = 'ag --vimgrep'

" indentline
" let g:indentLine_enabled = 0  "use :IndentLinesToggle to toggle
" I use this plugin in HTML files. While foldmethod=Manual (vim default),
" under normal mode one can press zfat to 'create fold [in] a tag' (for
" example, a paired <div>...</div> in HTML).

" limelight
" let g:limelight_paragraph_span = 1
" let g:limelight_default_coefficient = 0.7

" AsyncRun
augroup vimrc
    autocmd!
    autocmd User AsyncRunStart call asyncrun#quickfix_toggle(8, 1)
    " dont know why this cannot work
    "autocmd FileType tex autocmd User AsyncRunStop echom 'Press <leader>v to view'
    "autocmd FileType tex autocmd User AsyncRunStop call SynctexShow()  "this steal the focus
augroup END

" vim-tex-fold
let g:tex_fold_additional_envs = ['sidewaystable', 'frontmatter', 'comment']
" let  g:tex_fold_enabled=1

" restore_view
" use it for folded files, personally I prefer to remember the fold status in
" tex, python, markdown only
set viewoptions=cursor,folds,slash,unix
let g:skipview_files = ['*\.vim', '*rc', '*\.txt', '*\.bib', '*COMMIT_EDITMSG', '.gitignore', '\*.f95', '\*.c', '\*.h', 'Makefile']

" ale
let g:ale_lint_on_text_changed = 'never'
let g:ale_lint_on_save = 1
let g:ale_tex_chktex_options = '-n24 -n3'
" "use chktex args to ignore warnings, see http://www.nongnu.org/chktex/ChkTeX.pdf
let g:ale_python_flake8_options = ' --ignore=E501,C0103,E225,E226,E231'
let g:ale_linters = {
        \   'python': ['flake8'],
        \}

" vim-airline
let g:airline_extensions = ['tabline']  " no need 'tagbar', 'branch', 'wordcount', ...
let g:airline_powerline_fonts = 0
" let g:airline#extensions#tagbar#enabled = 0  " slow

" airline + AsyncRun
let g:airline_section_error = airline#section#create_right(['%{g:asyncrun_status}'])
" uncomment the following lines in case there is no airline installed
" augroup QuickfixStatus
"     au! BufWinEnter quickfix setlocal
"         \ statusline=%t\ [%{g:asyncrun_status}]\ %{exists('w:quickfix_title')?\ '\ '.w:quickfix_title\ :\ ''}\ %=%-15(%l,%c%V%)\ %P
" augroup END

" Tagbar
" use Exuberant ctags 5.5 or higher (not the one in OSX 10.9)
let g:tagbar_ctags_bin = '/opt/local/bin/ctags'
let g:tagbar_compact = 1
let g:tagbar_width = 32
" fix for Makefile: kind 't' is not defined but is returned by Exuberant Ctags 5.8
let g:tagbar_type_make = {
    \ 'kinds' : [
        \ 'm:macros',
        \ 't:typedef',
    \ ],
\ }
" add tex support (same as the example in :help tagbar)
" 1. add/update ~/.ctags
" 2. use the right file type. ".tex" can be "tex" or "plaintex", use :set filetype
"    to check, see also
"    https://stackoverflow.com/questions/26145505/using-vims-tagbar-plugin-for-latex-files
let g:tagbar_type_tex = {
    \ 'ctagstype' : 'latex',
    \ 'kinds'     : [
        \ 's:sections',
        \ 'g:graphics:0:0',
        \ 'l:labels',
        \ 'r:refs:1:0',
        \ 'p:pagerefs:1:0'
    \ ],
    \ 'sort'    : 0,
\ }