path: root/plugins.vim

scriptencoding utf-8
"{ Plugin installation
"{{ Vim-plug Install and related settings

" Auto-install vim-plug on different systems if it does not exist. For
" Windows, only Windows 10 with curl installed are supported (after Windows 10
" build 17063, source:
" https://devblogs.microsoft.com/commandline/tar-and-curl-come-to-windows/).
" The following script to install vim-plug is adapted from vim-plug
" wiki: https://github.com/junegunn/vim-plug/wiki/tips#tips
let g:vim_plug_fpath = expand(stdpath('data') . '/site/autoload/plug.vim')
if (g:is_win || g:is_mac) && !filereadable(g:vim_plug_fpath)
  if !executable('curl')
    echoerr 'Curl not available on your system, you may install vim-plug by yourself.'
    finish
  endif
  echomsg 'Installing Vim-plug on your system'
  let g:vim_plug_furl = 'https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
  silent execute printf('!curl -fLo %s --create-dirs %s', g:vim_plug_fpath, g:vim_plug_furl)
  augroup plug_init
      autocmd!
      autocmd VimEnter * PlugInstall --sync | quit |source $MYVIMRC
  augroup END
endif

" The directory to install plugins.
let g:PLUGIN_HOME=expand(stdpath('data') . '/plugged')
"}}

"{{ Autocompletion related plugins
call plug#begin(g:PLUGIN_HOME)
" Auto-completion
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }

if executable('clang') && (g:is_mac || g:is_linux)
  Plug 'deoplete-plugins/deoplete-clang'
endif

" Python source for deoplete
Plug 'zchee/deoplete-jedi', { 'for': 'python' }

" Vim source for deoplete
Plug 'Shougo/neco-vim', { 'for': 'vim' }
"}}

"{{ Python-related plugins
" Python completion, goto definition etc.
Plug 'davidhalter/jedi-vim', { 'for': 'python' }

" Python syntax highlighting and more
if g:is_mac || g:is_win
  Plug 'numirias/semshi', { 'do': ':UpdateRemotePlugins' }
endif

" Python indent (follows the PEP8 style)
Plug 'Vimjas/vim-python-pep8-indent', {'for': 'python'}

" Python-related text object
Plug 'jeetsukumaran/vim-pythonsense'
Plug 'machakann/vim-swap'
"}}

"{{ Search related plugins
" Super fast movement with vim-sneak
Plug 'justinmk/vim-sneak'

" Clear highlight search automatically for you
Plug 'romainl/vim-cool'

" Show current search term in different color
Plug 'PeterRincker/vim-searchlight'

" Show match number for incsearch
Plug 'osyo-manga/vim-anzu'

" Stay after pressing * and search selected text
Plug 'haya14busa/vim-asterisk'

" File search, tag search and more
if g:is_win
  Plug 'Yggdroot/LeaderF'
else
  Plug 'Yggdroot/LeaderF', { 'do': './install.sh' }
endif

" Another similar plugin is command-t
" Plug 'wincent/command-t'

" Another grep tool (similar to Sublime Text Ctrl+Shift+F)
" Plug 'dyng/ctrlsf.vim'

" A greping tool
" Plug 'mhinz/vim-grepper', { 'on': ['Grepper', '<plug>(GrepperOperator)'] }
"}}

"{{ UI: Color, theme etc.
" A list of colorscheme plugin you may want to try. Find what suits you.
Plug 'lifepillar/vim-gruvbox8'
Plug 'srcery-colors/srcery-vim'
Plug 'sjl/badwolf'
Plug 'ajmwagar/vim-deus'
Plug 'https://gitlab.com/yorickpeterse/happy_hacking.vim.git'
Plug 'lifepillar/vim-solarized8'
Plug 'patstockwell/vim-monokai-tasty'
Plug 'rakr/vim-one'
Plug 'kaicataldo/material.vim'
Plug 'joshdick/onedark.vim'
Plug 'KeitaNakamura/neodark.vim'

if !exists('g:started_by_firenvim')
  " colorful status line and theme
  Plug 'vim-airline/vim-airline'
  Plug 'vim-airline/vim-airline-themes'
  Plug 'mhinz/vim-startify'
endif
"}}

"{{ Plugin to deal with URL
" Highlight URLs inside vim
Plug 'itchyny/vim-highlighturl'

" For Windows and Mac, we can open an URL in the browser. For Linux, it may
" not be possible since we maybe in a server which disables GUI.
if g:is_win || g:is_mac
  " open URL in browser
  Plug 'tyru/open-browser.vim'
endif
"}}

"{{ Navigation and tags plugin
" Only install these plugins if ctags are installed on the system
if executable('ctags')
  " plugin to manage your tags
  Plug 'ludovicchabant/vim-gutentags'
  " show file tags in vim window
  Plug 'liuchengxu/vista.vim'
endif
"}}

"{{ File editting plugin
" Snippet engine and snippet template
Plug 'SirVer/ultisnips'
Plug 'honza/vim-snippets'

" Automatic insertion and deletion of a pair of characters
Plug 'jiangmiao/auto-pairs'

" Comment plugin
Plug 'tpope/vim-commentary'

" Multiple cursor plugin like Sublime Text?
" Plug 'mg979/vim-visual-multi'

" Title character case
Plug 'christoomey/vim-titlecase'

" Autosave files on certain events
Plug '907th/vim-auto-save'

" graphcial undo history, see https://github.com/mbbill/undotree
Plug 'mbbill/undotree'

" another plugin to show undo history
" Plug 'simnalamburt/vim-mundo'

" Manage your yank history
if g:is_win || g:is_mac
  Plug 'svermeulen/vim-yoink'
endif

Plug 'bfredl/nvim-miniyank'

" Handy unix command inside Vim (Rename, Move etc.)
Plug 'tpope/vim-eunuch'

" Repeat vim motions
Plug 'tpope/vim-repeat'

" Show the content of register in preview window
" Plug 'junegunn/vim-peekaboo'
"}}

"{{ Linting, formating
" Syntax check and make
" Plug 'neomake/neomake'

" Another linting plugin
Plug 'dense-analysis/ale'

" Auto format tools
Plug 'sbdchd/neoformat', { 'on': 'Neoformat' }
" Plug 'Chiel92/vim-autoformat'
"}}

"{{ Git related plugins
" Show git change (change, delete, add) signs in vim sign column
Plug 'mhinz/vim-signify'
" Another similar plugin
" Plug 'airblade/vim-gitgutter'

" Git command inside vim
Plug 'tpope/vim-fugitive'

" Git commit browser
Plug 'junegunn/gv.vim', { 'on': 'GV' }
"}}

"{{ Plugins for markdown writing
" Another markdown plugin
Plug 'plasticboy/vim-markdown', { 'for': 'markdown' }

" Faster footnote generation
Plug 'vim-pandoc/vim-markdownfootnotes', { 'for': 'markdown' }

" Vim tabular plugin for manipulate tabular, required by markdown plugins
Plug 'godlygeek/tabular', {'on': 'Tabularize'}

" Markdown JSON header highlight plugin
Plug 'elzr/vim-json', { 'for': ['json', 'markdown'] }

" Markdown previewing (only for Mac and Windows)
if g:is_win || g:is_mac
  Plug 'iamcco/markdown-preview.nvim', { 'do': { -> mkdp#util#install() }, 'for': ['markdown', 'vim-plug'] }
endif

" emoji
" Plug 'https://gitlab.com/gi1242/vim-emoji-ab'
Plug 'fszymanski/deoplete-emoji', {'for': 'markdown'}

if g:is_mac
  Plug 'rhysd/vim-grammarous'
endif

Plug 'chrisbra/unicode.vim'
"}}

"{{ Text object plugins
" Additional powerful text object for vim, this plugin should be studied
" carefully to use its full power
Plug 'wellle/targets.vim'

" Plugin to manipulate characer pairs quickly
" Plug 'tpope/vim-surround'
Plug 'machakann/vim-sandwich'

" Add indent object for vim (useful for languages like Python)
Plug 'michaeljsmith/vim-indent-object'
"}}

"{{ LaTeX editting and previewing plugin
" Only use these plugin on Windows and Mac and when LaTeX is installed
if ( g:is_win || g:is_mac ) && executable('latex')
  " vimtex use autoload feature of Vim, so it is not necessary to use `for`
  " keyword of vim-plug to try to lazy-load it,
  " see https://github.com/junegunn/vim-plug/issues/785
  Plug 'lervag/vimtex'

  " Plug 'matze/vim-tex-fold', {'for': 'tex'}
  " Plug 'Konfekt/FastFold'
endif
"}}

"{{ Tmux related plugins
" Since tmux is only available on Linux and Mac, we only enable these plugins
" for Linux and Mac
if (g:is_linux || g:is_mac) && executable('tmux')
  " Let vim detect tmux focus event correctly, see
  " https://github.com/neovim/neovim/issues/9486 and
  " https://vi.stackexchange.com/q/18515/15292
  Plug 'tmux-plugins/vim-tmux-focus-events'

  " .tmux.conf syntax highlighting and setting check
  Plug 'tmux-plugins/vim-tmux', { 'for': 'tmux' }
endif
"}}

"{{ HTML related
Plug 'mattn/emmet-vim'
"}}

"{{ Misc plugins
" Modern matchit implementation
Plug 'andymass/vim-matchup'

" Smoothie motions
Plug 'psliwka/vim-smoothie'

Plug 'tpope/vim-scriptease'

" Asynchronous command execution
Plug 'skywind3000/asyncrun.vim'
" Another asynchronous plugin
" Plug 'tpope/vim-dispatch'
Plug 'cespare/vim-toml'

" Edit text area in browser using nvim
if g:is_mac || g:is_win
  Plug 'glacambre/firenvim', { 'do': { _ -> firenvim#install(0) } }
endif

" Debugger plugin
if g:is_mac || g:is_linux
  Plug 'sakhnik/nvim-gdb', { 'do': ':!./install.sh \| UpdateRemotePlugins' }
endif
call plug#end()
"}}
"}

"{ Plugin settings
"{{ Vim-plug settings
" Use shortnames for common vim-plug command to reduce typing.
" To use these shortcut: first activate command line with `:`, then input the
" short alias, e.g., `pi`, then press <space>, the alias will be expanded
" to the full command automatically
call utils#Cabbrev('pi', 'PlugInstall')
call utils#Cabbrev('pud', 'PlugUpdate')
call utils#Cabbrev('pug', 'PlugUpgrade')
call utils#Cabbrev('ps', 'PlugStatus')
call utils#Cabbrev('pc', 'PlugClean')
"}}

"{{ Auto-completion related
"""""""""""""""""""""""""""" deoplete settings""""""""""""""""""""""""""
" Wheter to enable deoplete automatically after start nvim
let g:deoplete#enable_at_startup = 1

" Maximum candidate window width
call deoplete#custom#source('_', 'max_menu_width', 80)

" Minimum character length needed to activate auto-completion.
call deoplete#custom#source('_', 'min_pattern_length', 1)

" Whether to disable completion for certain syntax
" call deoplete#custom#source('_', {
"     \ 'filetype': ['vim'],
"     \ 'disabled_syntaxes': ['String']
"     \ })
call deoplete#custom#source('_', {
  \ 'filetype': ['python'],
  \ 'disabled_syntaxes': ['Comment']
  \ })

" Ignore certain sources, because they only cause nosie most of the time
call deoplete#custom#option('ignore_sources', {
   \ '_': ['around', 'buffer', 'tag']
   \ })

" Candidate list item number limit
call deoplete#custom#option('max_list', 30)

" The number of processes used for the deoplete parallel feature.
call deoplete#custom#option('num_processes', 16)

" The delay for completion after input, measured in milliseconds.
call deoplete#custom#option('auto_complete_delay', 100)

" Enable deoplete auto-completion
call deoplete#custom#option('auto_complete', v:true)

"""""""""""""""""""""""""UltiSnips settings"""""""""""""""""""
" Trigger configuration. Do not use <tab> if you use YouCompleteMe
let g:UltiSnipsExpandTrigger='<c-j>'

" Do not look for SnipMate snippets
let g:UltiSnipsEnableSnipMate = 0

" Shortcut to jump forward and backward in tabstop positions
let g:UltiSnipsJumpForwardTrigger='<c-j>'
let g:UltiSnipsJumpBackwardTrigger='<c-k>'

" Configuration for custom snippets directory, see
" https://jdhao.github.io/2019/04/17/neovim_snippet_s1/ for details.
let g:UltiSnipsSnippetDirectories=['UltiSnips', 'my_snippets']
"}}

"{{ Python-related
""""""""""""""""""deoplete-jedi settings"""""""""""""""""""""""""""
" Whether to show doc string
let g:deoplete#sources#jedi#show_docstring = 0

" For large package, set autocomplete wait time longer
let g:deoplete#sources#jedi#server_timeout = 50

" Ignore jedi errors during completion
let g:deoplete#sources#jedi#ignore_errors = 1

""""""""""""""""""""""""jedi-vim settings"""""""""""""""""""
" Disable autocompletion, because I use deoplete for auto-completion
let g:jedi#completions_enabled = 0

" Whether to show function call signature
let g:jedi#show_call_signatures = '0'

"""""""""""""""""""""""""" semshi settings """""""""""""""""""""""""""""""
" Do not highlight for all occurances of variable under cursor
let g:semshi#mark_selected_nodes=0

" Do not show error sign since linting plugin is specicialized for that
let g:semshi#error_sign=v:false
"}}

"{{ Search related
"""""""""""""""""""""""""""""vim-sneak settings"""""""""""""""""""""""
" Use sneak label mode
let g:sneak#label = 1

nmap f <Plug>Sneak_s
xmap f <Plug>Sneak_s
onoremap <silent> f :call sneak#wrap(v:operator, 2, 0, 1, 1)<CR>
nmap F <Plug>Sneak_S
xmap F <Plug>Sneak_S
onoremap <silent> F :call sneak#wrap(v:operator, 2, 1, 1, 1)<CR>

" Immediately after entering sneak mode, you can press f and F to go to next
" or previous match
let g:sneak#s_next = 1

"""""""""""""""""""""""""""""vim-anzu settings"""""""""""""""""""""""
nmap n <Plug>(anzu-n-with-echo)zzzv
nmap N <Plug>(anzu-N-with-echo)zzzv

" Maximum number of words to search
let g:anzu_search_limit = 500000

" Message to show for search pattern
let g:anzu_status_format = '/%p [%i/%l]'

"""""""""""""""""""""""""""""vim-asterisk settings"""""""""""""""""""""
nmap *  <Plug>(asterisk-z*)
nmap #  <Plug>(asterisk-z#)
xmap *  <Plug>(asterisk-z*)
xmap #  <Plug>(asterisk-z#)

"""""""""""""""""""""""""""""LeaderF settings"""""""""""""""""""""
" Do not use cache file
let g:Lf_UseCache = 0

" Ignore certain files and directories when searching files
let g:Lf_WildIgnore = {
  \ 'dir': ['.git', '__pycache__', '.DS_Store'],
  \ 'file': ['*.exe', '*.dll', '*.so', '*.o', '*.pyc', '*.jpg', '*.png',
  \ '*.gif', '*.db', '*.tgz', '*.tar.gz', '*.gz', '*.zip', '*.bin', '*.pptx',
  \ '*.xlsx', '*.docx', '*.pdf', '*.tmp', '*.wmv', '*.mkv', '*.mp4',
  \ '*.rmvb']
  \}

" Do not show fancy icons for Linux server.
if g:is_linux
  let g:Lf_ShowDevIcons = 0
endif

" Only fuzzy-search files names
let g:Lf_DefaultMode = 'NameOnly'

let g:Lf_PopupColorscheme = 'gruvbox_default'

" Popup window settings
let g:Lf_PopupWidth = 0.5
let g:Lf_PopupPosition = [0, &columns/4]

" Do not use version control tool to list files under a directory since
" submodules are not searched by default.
let g:Lf_UseVersionControlTool = 0

" Disable default mapping
let g:Lf_ShortcutF = ''
let g:Lf_ShortcutB = ''

" set up working directory for git repository
let g:Lf_WorkingDirectoryMode = 'a'

" Search files in popup window
nnoremap <silent> <leader>f :<C-U>Leaderf file --popup<CR>
" Search vim help files
nnoremap <silent> <leader>h :<C-U>Leaderf help --popup<CR>
" Search tags in current buffer
nnoremap <silent> <leader>t :<C-U>Leaderf bufTag --popup<CR>
"}}

"{{ URL related
""""""""""""""""""""""""""""open-browser.vim settings"""""""""""""""""""
if g:is_win || g:is_mac
  " Disable netrw's gx mapping.
  let g:netrw_nogx = 1

  " Use another mapping for the open URL method
  nmap ob <Plug>(openbrowser-smart-search)
  vmap ob <Plug>(openbrowser-smart-search)
endif
"}}

"{{ Navigation and tags
""""""""""""""""""""""""""" vista settings """"""""""""""""""""""""""""""""""
" Double click to go to a tag
nnoremap <silent> <2-LeftMouse> :<C-U>call vista#cursor#FoldOrJump()<CR>

let g:vista#renderer#icons = {
\   'member': '',
\  }

" Do not echo message on command line
let g:vista_echo_cursor = 0
" Stay in current window when vista window is opened
let g:vista_stay_on_open = 0

nnoremap <silent> <Space>t :<C-U>Vista!!<CR>

function! s:close_vista_win() abort
  if winnr('$') == 1 && getbufvar(bufnr(), '&filetype') ==# 'vista'
    quit
  endif
endfunction

augroup vista_close_win
  autocmd!
  autocmd BufEnter * call s:close_vista_win()
augroup END
"}}

"{{ File editting
""""""""""""""""""""""""""""vim-titlecase settings"""""""""""""""""""""""
" Do not use the default mapping provided
let g:titlecase_map_keys = 0

nmap <leader>gt <Plug>Titlecase
vmap <leader>gt <Plug>Titlecase
nmap <leader>gT <Plug>TitlecaseLine

""""""""""""""""""""""""vim-auto-save settings"""""""""""""""""""""""
" Enable autosave on nvim startup
let g:auto_save = 1

" A list of events to trigger autosave
let g:auto_save_events = ['InsertLeave', 'TextChanged']

" Whether to show autosave status on command line
let g:auto_save_silent = 0

""""""""""""""""""""""""""""vim-yoink settings"""""""""""""""""""""""""
if g:is_win || g:is_mac
  " ctrl-n and ctrl-p will not work if you add the TextChanged event to vim-auto-save events.
  " nmap <c-n> <plug>(YoinkPostPasteSwapBack)
  " nmap <c-p> <plug>(YoinkPostPasteSwapForward)

  " The following p/P mappings are also needed for ctrl-n and ctrl-p to work
  " nmap p <plug>(YoinkPaste_p)
  " nmap P <plug>(YoinkPaste_P)

  " Cycle the yank stack with the following mappings
  nmap [y <plug>(YoinkRotateBack)
  nmap ]y <plug>(YoinkRotateForward)

  " Do not change the cursor position
  nmap y <plug>(YoinkYankPreserveCursorPosition)
  xmap y <plug>(YoinkYankPreserveCursorPosition)

  " Move cursor to end of paste after multiline paste
  let g:yoinkMoveCursorToEndOfPaste = 0

  " Record yanks in system clipboard
  let g:yoinkSyncSystemClipboardOnFocus = 1
endif

""""""""""""""""""""""""""""nvim-minipyank settings"""""""""""""""""""""""""
nmap p <Plug>(miniyank-autoput)
nmap P <Plug>(miniyank-autoPut)
"}}

"{{ Linting and formating
"""""""""""""""""""""""""""""" ale settings """""""""""""""""""""""
" linters for different filetypes
let g:ale_linters = {
  \ 'python': ['pylint'],
  \ 'vim': ['vint'],
  \ 'cpp': ['clang'],
  \ 'c': ['clang']
\}

" Only run linters in the g:ale_linters dictionary
let g:ale_linters_explicit = 1

" Linter signs
let g:ale_sign_error = 'x'
let g:ale_sign_warning = '!'

"""""""""""""""""""""""""""""" neoformat settings """""""""""""""""""""""
let g:neoformat_enabled_python = ['black', 'yapf']
let g:neoformat_cpp_clangformat = {
  \ 'exe': 'clang-format',
  \ 'args': ['--style="{IndentWidth: 4}"']
\}
let g:neoformat_c_clangformat = {
  \ 'exe': 'clang-format',
  \ 'args': ['--style="{IndentWidth: 4}"']
\}

let g:neoformat_enabled_cpp = ['clangformat']
let g:neoformat_enabled_c = ['clangformat']
"}}

"{{ Git-related
"""""""""""""""""""""""""vim-signify settings""""""""""""""""""""""""""""""
" The VCS to use
let g:signify_vcs_list = [ 'git' ]

" Change the sign for certain operations
let g:signify_sign_change = '~'
"}}

"{{ Markdown writing
"""""""""""""""""""""""""plasticboy/vim-markdown settings"""""""""""""""""""
" Disable header folding
let g:vim_markdown_folding_disabled = 1

" Whether to use conceal feature in markdown
let g:vim_markdown_conceal = 1

" Disable math tex conceal and syntax highlight
let g:tex_conceal = ''
let g:vim_markdown_math = 0

" Support front matter of various format
let g:vim_markdown_frontmatter = 1  " for YAML format
let g:vim_markdown_toml_frontmatter = 1  " for TOML format
let g:vim_markdown_json_frontmatter = 1  " for JSON format

" Let the TOC window autofit so that it doesn't take too much space
let g:vim_markdown_toc_autofit = 1

"""""""""""""""""""""""""markdown-preview settings"""""""""""""""""""
" Only setting this for suitable platforms
if g:is_win || g:is_mac
  " Do not close the preview tab when switching to other buffers
  let g:mkdp_auto_close = 0

  " Shortcuts to start and stop markdown previewing
  nnoremap <silent> <M-m> :<C-U>MarkdownPreview<CR>
  nnoremap <silent> <M-S-m> :<C-U>MarkdownPreviewStop<CR>
endif

""""""""""""""""""""""""vim-markdownfootnotes settings""""""""""""""""""""""""
" Replace the default mappings provided by the plugin
imap ^^ <Plug>AddVimFootnote
nmap ^^ <Plug>AddVimFootnote
imap @@ <Plug>ReturnFromFootnote
nmap @@ <Plug>ReturnFromFootnote

""""""""""""""""""""""""vim-grammarous settings""""""""""""""""""""""""""""""
if g:is_mac
  let g:grammarous#languagetool_cmd = 'languagetool'
  nmap <leader>x <Plug>(grammarous-close-info-window)
  nmap <c-n> <Plug>(grammarous-move-to-next-error)
  nmap <c-p> <Plug>(grammarous-move-to-previous-error)
  let g:grammarous#disabled_rules = {
      \ '*' : ['WHITESPACE_RULE', 'EN_QUOTES', 'ARROWS', 'SENTENCE_WHITESPACE',
      \        'WORD_CONTAINS_UNDERSCORE', 'COMMA_PARENTHESIS_WHITESPACE',
      \        'EN_UNPAIRED_BRACKETS', 'UPPERCASE_SENTENCE_START',
      \        'ENGLISH_WORD_REPEAT_BEGINNING_RULE', 'DASH_RULE', 'PLUS_MINUS',
      \        'PUNCTUATION_PARAGRAPH_END', 'MULTIPLICATION_SIGN', 'PRP_CHECKOUT',
      \        'CAN_CHECKOUT', 'SOME_OF_THE', 'DOUBLE_PUNCTUATION', 'HELL',
      \        'CURRENCY', 'POSSESSIVE_APOSTROPHE', 'ENGLISH_WORD_REPEAT_RULE',
      \        'NON_STANDARD_WORD', 'AU'],
      \ }
endif

""""""""""""""""""""""""unicode.vim settings""""""""""""""""""""""""""""""
nmap ga <Plug>(UnicodeGA)

""""""""""""""""""""""""deoplete-emoji settings""""""""""""""""""""""""""""
call deoplete#custom#source('emoji', 'converters', ['converter_emoji'])
"}}

"{{ text objects
""""""""""""""""""""""""""""vim-sandwich settings"""""""""""""""""""""""""""""
" Map s to nop since s in used by vim-sandwich. Use cl instead of s.
nmap s <Nop>
omap s <Nop>
"}}

"{{ LaTeX editting
""""""""""""""""""""""""""""vimtex settings"""""""""""""""""""""""""""""
if ( g:is_win || g:is_mac ) && executable('latex')
  " Set up LaTeX flavor
  let g:tex_flavor = 'latex'

  " Deoplete configurations for autocompletion to work
  call deoplete#custom#var('omni', 'input_patterns', {
        \ 'tex': g:vimtex#re#deoplete
        \ })

  let g:vimtex_compiler_latexmk = {
        \ 'build_dir' : 'build',
        \ }

  " TOC settings
  let g:vimtex_toc_config = {
        \ 'name' : 'TOC',
        \ 'layers' : ['content', 'todo', 'include'],
        \ 'resize' : 1,
        \ 'split_width' : 30,
        \ 'todo_sorted' : 0,
        \ 'show_help' : 1,
        \ 'show_numbers' : 1,
        \ 'mode' : 2,
        \ }

  " Viewer settings for different platforms
  if g:is_win
    let g:vimtex_view_general_viewer = 'SumatraPDF'
    let g:vimtex_view_general_options_latexmk = '-reuse-instance'
    let g:vimtex_view_general_options = '-reuse-instance -forward-search @tex @line @pdf'
  endif

  " The following code is adapted from https://gist.github.com/skulumani/7ea00478c63193a832a6d3f2e661a536.
  if g:is_mac
    " let g:vimtex_view_method = "skim"
    let g:vimtex_view_general_viewer = '/Applications/Skim.app/Contents/SharedSupport/displayline'
    let g:vimtex_view_general_options = '-r @line @pdf @tex'

    " This adds a callback hook that updates Skim after compilation
    let g:vimtex_compiler_callback_hooks = ['UpdateSkim']

    function! UpdateSkim(status) abort
      if !a:status | return | endif

      let l:out = b:vimtex.out()
      let l:src_file_path = expand('%:p')
      let l:cmd = [g:vimtex_view_general_viewer, '-r']

      if !empty(system('pgrep Skim'))
        call extend(l:cmd, ['-g'])
      endif

      call jobstart(l:cmd + [line('.'), l:out, l:src_file_path])
    endfunction
  endif
endif
"}}

"{{ UI: Status line, look
"""""""""""""""""""""""""""vim-airline setting""""""""""""""""""""""""""""""
" Set airline theme to a random one if it exists
let s:candidate_airlinetheme = ['ayu_mirage', 'lucius', 'ayu_dark', 'base16_bright',
      \ 'base16_adwaita', 'jellybeans', 'luna', 'raven', 'term', 'base16_summerfruit']
let s:idx = utils#RandInt(0, len(s:candidate_airlinetheme)-1)
let s:theme = s:candidate_airlinetheme[s:idx]

if utils#HasAirlinetheme(s:theme)
  let g:airline_theme=s:theme
endif

" Tabline settings
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#formatter = 'unique_tail_improved'

" Show buffer number for easier switching between buffer,
" see https://github.com/vim-airline/vim-airline/issues/1149
let g:airline#extensions#tabline#buffer_nr_show = 1

" Buffer number display format
let g:airline#extensions#tabline#buffer_nr_format = '%s. '

" Whether to show function or other tags on status line
let g:airline#extensions#tagbar#enabled = 1
let g:airline#extensions#vista#enabled = 1

" Do not show search index in statusline since it is shown on command line
let g:airline#extensions#anzu#enabled = 0

" Skip empty sections if there are nothing to show,
" extracted from https://vi.stackexchange.com/a/9637/15292
let g:airline_skip_empty_sections = 1

" Whether to use powerline symbols, see https://vi.stackexchange.com/q/3359/15292
let g:airline_powerline_fonts = 0

if !exists('g:airline_symbols')
  let g:airline_symbols = {}
endif
let g:airline_symbols.branch = '⎇'
let g:airline_symbols.paste = 'ρ'
let g:airline_symbols.spell = 'Ꞩ'

" Only show git hunks which are non-zero
let g:airline#extensions#hunks#non_zero_only = 1

" Speed up airline
let g:airline_highlighting_cache = 1
"}}

"{{ Misc plugin setting
""""""""""""""""""""""""""""vim-matchup settings"""""""""""""""""""""""""""""
" Improve performance
let g:matchup_matchparen_deferred = 1
let g:matchup_matchparen_timeout = 100
let g:matchup_matchparen_insert_timeout = 30

" Enhanced matching with matchup plugin
let g:matchup_override_vimtex = 1

" Whether to enable matching inside comment or string
let g:matchup_delim_noskips = 0

" Show offscreen match pair in popup window
let g:matchup_matchparen_offscreen = {'method': 'popup'}

" Change highlight color of matching bracket for better visual effects
augroup matchup_matchparen_highlight
  autocmd!
  autocmd ColorScheme * highlight MatchParen cterm=underline gui=underline
augroup END

" Show matching keyword as underlined text to reduce color clutter
augroup matchup_matchword_highlight
  autocmd!
  autocmd ColorScheme * hi MatchWord cterm=underline gui=underline
augroup END

"""""""""""""""""""""""""" asyncrun.vim settings """"""""""""""""""""""""""
" Automatically open quickfix window of 6 line tall after asyncrun starts
let g:asyncrun_open = 6
if g:is_win
  " Command output encoding for Windows
  let g:asyncrun_encs = 'gbk'
endif

""""""""""""""""""""""""""""""firenvim settings""""""""""""""""""""""""""""""
if exists('g:started_by_firenvim') && g:started_by_firenvim
  " general options
  set laststatus=0 nonumber noruler noshowcmd

  " general config for firenvim
  let g:firenvim_config = {
      \ 'globalSettings': {
          \ 'alt': 'all',
      \  },
      \ 'localSettings': {
          \ '.*': {
              \ 'cmdline': 'neovim',
              \ 'priority': 0,
              \ 'selector': 'textarea',
              \ 'takeover': 'never',
          \ },
      \ }
  \ }

  augroup firenvim
    autocmd!
    autocmd BufEnter *.txt setlocal filetype=markdown
  augroup END
endif

""""""""""""""""""""""""""""""nvim-gdb settings""""""""""""""""""""""""""""""
nnoremap <leader>dp :<C-U>GdbStartPDB python -m pdb %<CR>
"}}
"}