dotfiles/.config/nvim/init.vim

" vim: set foldmethod=marker foldlevel=0 nomodeline:
" ================================================================================
" .init.vim / .vimrc of Marty Oehme {{{
" ================================================================================
"
" - stolen from many different sources including
" Steve Losh
" Junegunn Choi
" Tim Pope

" this config does not set nocompatible - neovim does this automatically
" this config does not set filetype plugin - vim-sensible does this
" }}}
" PLUGIN INSTALLATION - handled by VIM-PLUG {{{
" ================================================================================
"
" automatically install vim-plug if it does not exist
" Note: this installs it in the neovim folder, not the vim folder
if empty(glob('~/.local/share/nvim/site/autoload/plug.vim'))
  silent !curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC | q
endif

" automatically install any missing plugins
autocmd VimEnter *
  \  if len(filter(values(g:plugs), '!isdirectory(v:val.dir)'))
  \|   PlugInstall --sync | q
  \| endif

" defines plugin directory
" Install plugins from vim with :PlugInstall
silent! if plug#begin('~/.local/share/nvim/plugged')

" Base
" a minimal definition of variables TODO still necessary for nvim?
Plug 'tpope/vim-sensible'
" add seamless movement between vim and tmux, switch windows with C-hjkl
Plug 'christoomey/vim-tmux-navigator'
" automatically switch between relative and absolute numbers as buffers move
" into / out of focus (requires number & relativenumber to be set)
Plug 'jeffkreeftmeijer/vim-numbertoggle'
" Plug 'liuchengxu/vim-which-key', { 'on': ['WhichKey', 'WhichKey!'] } ->
" instructions: http://liuchengxu.org/vim-which-key/, needs setup tp become
" useful. TODO enable when setup is more settled down
" sneak around your files using
Plug 'justinmk/vim-sneak'
" highlight all occurences of the current word under the cursor (after 250ms
" delay)
Plug 'RRethy/vim-illuminate'


" " editing Workflow
Plug 'tpope/vim-commentary' " easily toggle comments for lines, paragraphs etc with gc
Plug 'tommcdo/vim-exchange' " adds exchange operator with cx. common use: cxiw . on 2 words to switch
Plug 'tpope/vim-surround' " lets you change surrounding things with cs (or ds to del, ys to add)

" " Ecosystem
" " Plug 'tpope/vim-fugitive' - Will have to take a closer look some other time
Plug 'scrooloose/nerdtree', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show a directory listing within vim
Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show git status in nerdtree for files and dirs

" Fuzzy matching
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --bin' }
Plug 'junegunn/fzf.vim'
Plug 'alok/notational-fzf-vim'
Plug 'dyng/ctrlsf.vim'

" Language Integration
Plug 'sheerun/vim-polyglot' " syntax plugins for almost every language
Plug 'stephpy/vim-yaml'
Plug 'mhartington/nvim-typescript', {'for': 'typescript','do': './install.sh'}
Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }
Plug 'deoplete-plugins/deoplete-go', { 'do': 'make'}
Plug 'aliou/bats.vim'

" HTML Workflow
Plug 'valloric/matchtagalways', { 'on': [] }
Plug 'alvan/vim-closetag', { 'on': [] }
Plug 'jiangmiao/auto-pairs', { 'on': [] } " Auto close brackets and ''
augroup load_html_utils
  autocmd!
  autocmd InsertEnter * call plug#load('matchtagalways', 'vim-closetag', 'auto-pairs')
                      \| autocmd! load_html_utils
augroup END

" Prose Workflow
Plug 'kana/vim-textobj-user' " dependency for most other textobj plugins
Plug 'reedes/vim-textobj-sentence' " extends the capabilities of sentence detection
" and allows you to jump to the *end* of this <g)> or last <g(> sentence.

Plug 'reedes/vim-pencil', { 'for': ['markdown', 'txt'], 'on': 'Goyo' } " provide md convenience functions like hard/softwrap
Plug 'junegunn/goyo.vim', { 'for': ['markdown', 'txt'], 'on': 'Goyo' } " provide distraction free writing
Plug 'junegunn/limelight.vim', { 'for': ['markdown', 'txt'], 'on': 'Goyo' } " provide even distraction free-er writing (lowlight paragraphs)

" RMarkdown & LaTeX workflow
Plug 'vim-pandoc/vim-pandoc-syntax'
Plug 'vim-pandoc/vim-pandoc'
" Plug 'vim-pandoc/vim-rmarkdown'

" Note-Taking Workflow
Plug 'lervag/wiki.vim'

" For async completion
Plug 'Shougo/deoplete.nvim', { 'on': [] } " automatic suggestions, can also perhaps be changed for newer plugs
Plug 'Shougo/echodoc.vim', { 'on': [] }
Plug 'w0rp/ale', { 'on': [] } " asynchronous linting - might be superseded by lsp or coc.nvim at some point
" lazy loading since they require a lot of startup time
augroup load_ide_features
  autocmd!
  autocmd InsertEnter * call plug#load('ale', 'deoplete.nvim', 'echodoc.vim')
                     \| autocmd! load_ide_features
  autocmd InsertEnter * call deoplete#enable()
  autocmd InsertEnter * call echodoc#enable()

  " Add pandoc citations to deoplete automatic completions
  autocmd InsertEnter * call deoplete#custom#var('omni', 'input_patterns', {
        \ 'pandoc': '@'
        \})

augroup END

" Design
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'edkolev/tmuxline.vim'

" Colorschemes
Plug 'rafi/awesome-vim-colorschemes'
Plug 'reedes/vim-colors-pencil'
Plug 'rakr/vim-togglebg'

call plug#end()
endif

" }}}
" PLUGIN CONFIGURATION {{{
" ================================================================================

let g:sneak#s_next = 1
let g:sneak#use_ic_scs = 1

" PLUGIN: NERDTree
" highlight the line the cursor is on
let NERDTreeHighlightCursorline = 1

" remove Press ? for help
let NERDTreeMinimalUI=1

" loads nerdtree plugin when starting vim with a directory
" this is necessary when we lazyload nerdtree with vimplug above
" since it would only get loaded with nttoggle otherwise, and run netrw
augroup nerd_loader
  autocmd!
  autocmd VimEnter * silent! autocmd! FileExplorer
  autocmd BufEnter,BufNew *
        \  if isdirectory(expand('<amatch>'))
        \|   call plug#load('nerdtree')
        \|   execute 'autocmd! nerd_loader'
        \| endif
augroup END

" " PLUGIN: markdown-group
" " unify markdown extensions to all use markdown filetype
" au! BufRead,BufNewFile *.markdown set filetype=markdown
" au! BufRead,BufNewFile *.md       set filetype=markdown
" au! BufRead,BufNewFile *.mkd      set filetype=markdown

" automatically enables markdown plugins for md & txt files
function! Prose()
  call plug#load('vim-pencil')
  call pencil#init()
  " PLUGIN: vim-textobj-sentence
  " enable extended sentence textobject use on md and plaintext files
  call textobj#sentence#init()
  " hide the markdown cruft
  setlocal conceallevel=2
  setlocal foldlevel=2
endfunction
" enable syntax highlighting for codeblocks WITHIN markdown
let g:markdown_fenced_languages = ['html', 'python', 'bash=sh', 'javascipt', 'go']

" call the prose function defined above for any md files
au FileType pandoc,markdown call Prose()

" or invoke it manually by writing :Prose
command! -nargs=0 Prose call Prose()

" PLUGIN: vim-pandoc
" handle markdown files with pandoc (and pandoc syntax!)
let g:pandoc#modules#disabled = ["folding"]
let g:pandoc#filetypes#pandoc_markdown = 1
" disable all default keymaps
let g:pandoc#keyboard#use_default_mappings=0
let g:pandoc#hypertext#use_default_mappings=0
" if there's a pdf and an html or similar, open the pdf
let g:pandoc#command#prefer_pdf=1
" look for bibtex files w/ same name as edited one, then .bib in current dir, yaml frontmatter, and finally the globally set bibs file
let g:pandoc#biblio#sources="bcyg"
" the globally set bibs file
let g:pandoc#biblio#bibs=[expand("~/Nextcloud/Library/academia/academia.bib")]
let g:pandoc#biblio#use_bibtool=1
let g:pandoc#biblio#use_preview=1
let g:pandoc#completion#bib#mode='citeproc'
let g:pandoc#folding#fold_yaml=1
let g:pandoc#folding#fastfolds=1
" let g:pandoc#folding#level=2
let g:pandoc#spell#default_langs=["en_us", "de_de"]
let g:pandoc#hypertext#ausosave_on_edit_open_link=1
let g:pandoc#hypertext#create_if_no_alternates_exists=1
let g:pandoc#syntax#conceal#use = 1
let g:pandoc#syntax#conceal#urls = 1

" PLUGIN: wiki.vim
if $WIKIROOT ==? ""
  let g:wiki_root = '~/Nextcloud/Notes/'
else
  let g:wiki_root = $WIKIROOT
endif
" filetypes to automatically enable the plugin for, seems to take file endings
" rather than vim ft
let g:wiki_filetypes = ['md', 'mkd', 'markdown', 'wiki']
let g:wiki_link_extension = '.md'
let g:wiki_link_target_type = 'md'
let g:wiki_mappings_use_defaults = 1

" PLUGIN: vim-pencil
" set default wrap mode to hard - TODO test which mode works better for
" me, it seems hardmode has trouble with markdown lists (see issue #31)
let g:pencil#wrapModeDefault = 'soft'   " default is 'hard'

" PLUGIN: goyo
" set up functions for entering/exiting distraction free mode, or leaving it
function! s:goyo_enter()
  " remove the tmux status bar for actual distraction free environment
  silent !tmux set status off
  " maximize the tmux pane that vim is in if any (usually I have vim open as the only pane)
  silent !tmux list-panes -F '\#F' | grep -q Z || tmux resize-pane -Z
  " disable line highlighting, we really don't need it for prose
  set nocursorline
  " enable limelight which highlights whatever paragraph you are in and lowlights the rest
  Limelight
endfunction
function! s:goyo_leave()
  silent !tmux set status on
  silent !tmux list-panes -F '\#F' | grep -q Z && tmux resize-pane -Z
  set cursorline
  Limelight!
endfunction
" actually call the functions on entering/leaving goyo
autocmd! User GoyoEnter nested call <SID>goyo_enter()
autocmd! User GoyoLeave nested call <SID>goyo_leave()

" FZF Fuzzy Finding
" set some fzf defaults
let g:fzf_layout = { 'up': '~40%' }
let g:fzf_command_prefix = 'Fzf'
let g:fzf_colors =
\ { 'fg':      ['fg', 'Normal'],
  \ 'bg':      ['bg', 'Normal'],
  \ 'hl':      ['fg', 'Comment'],
  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
  \ 'hl+':     ['fg', 'Statement'],
  \ 'info':    ['fg', 'PreProc'],
  \ 'border':  ['fg', 'Ignore'],
  \ 'prompt':  ['fg', 'Conditional'],
  \ 'pointer': ['fg', 'Exception'],
  \ 'marker':  ['fg', 'Keyword'],
  \ 'spinner': ['fg', 'Label'],
  \ 'header':  ['fg', 'Comment'] }
let g:fzf_action = {
  \ 'ctrl-t': 'tab split',
  \ 'ctrl-x': 'split',
  \ 'ctrl-v': 'vsplit' }

" set up fzf-bibtex
let g:fzf_bibtex_cache = '~/.cache/'
let g:fzf_bibtex_sources = g:pandoc#biblio#bibs

" prepare bibtex_ls function to look for bib files in cwd/parent/subdirs,
" attach the standard bibtex source file
" return the command with standard cache directory filled
function! s:bibtex_ls(...)
  let bibfiles = (
      \ globpath('.', '*.bib', v:true, v:true) +
      \ globpath('..', '*.bib', v:true, v:true) +
      \ globpath('*/', '*.bib', v:true, v:true)
      \ )
  let bibfiles = join(bibfiles, ' ')
  let source_cmd = 'bibtex-ls -cache ' . g:fzf_bibtex_cache . ' ' .bibfiles . ' ' . join(g:fzf_bibtex_sources)
  return source_cmd
endfunction

" insert citation from normal mode at cursor (with brackets)
function! s:bibtex_cite_sink(lines)
    let r=system("bibtex-cite ", a:lines)
    execute ':normal! i[' . r . ']'
endfunction
command! -bang -nargs=* CiteRef call fzf#run(fzf#wrap({
      \ 'source': <sid>bibtex_ls(<q-args>),
      \ 'sink*': function('<sid>bibtex_cite_sink'),
      \ 'up': '25%',
      \ 'options': '--ansi --multi --prompt "Cite> "'
      \ }))
" insert citation from insert mode at cursor (no brackets inserted)
function! s:bibtex_cite_sink_insert(lines)
    let r=system("bibtex-cite ", a:lines)
    execute ':normal! i' . r
    call feedkeys('a', 'n')
endfunction
" insert markdown formatted reference
function! s:bibtex_markdown_sink(lines)
  let r=system("bibtex-markdown -cache " . g:fzf_bibtex_cache . ' ' . join(g:fzf_bibtex_sources), a:lines)
  echo join(a:lines, '; ')
  execute ':normal! i' . r
endfunction
command! -bang -nargs=* CiteMarkdown call fzf#run(fzf#wrap({
      \ 'source': <sid>bibtex_ls(),
      \ 'sink*': function('<sid>bibtex_markdown_sink'),
      \ 'up': '25%',
      \ 'options': '--ansi --multi --prompt "Markdown> "'
      \ }))

" PLUGIN: vim-go
" change the tabstops for go to use tabs and a width of 4
" this conforms with the gofmt expectations
au FileType go set noexpandtab
au FileType go set shiftwidth=4
au FileType go set softtabstop=4
au FileType go set tabstop=4
" enable all sorts of highlighting options for
" variables/functions/arguments...
let g:go_highlight_build_constraints = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_fields = 1
let g:go_highlight_functions = 1
let g:go_highlight_methods = 1
let g:go_highlight_operators = 1
let g:go_highlight_structs = 1
let g:go_highlight_types = 1
" enable highlighting of other uses of the same variable
let g:go_auto_sameids = 1
" automatically import needed dependencies
" TODO do I need this? not doing it automatically does lead to more conscious
" decision making on imports
let g:go_fmt_command = "goimports"
" show type information for variables in the status line
let g:go_auto_type_info = 1


" PLUGIN: DEOPLETE
" enable deoplete at startup
let g:deoplete#enable_at_startup = 0
let g:deoplete#enable_ignore_case = 1
let g:deoplete#enable_smart_case = 1
let g:deoplete#enable_camel_case = 1
let g:deoplete#enable_refresh_always = 1
let g:deoplete#max_abbr_width = 0
let g:deoplete#max_menu_width = 0
let g:deoplete#omni#input_patterns = get(g:,'deoplete#omni#input_patterns',{})
" PLUGIN: ECHODOC
let g:echodoc#type="virtual"
set splitbelow
set completeopt+=menuone,noinsert,noselect
set completeopt-=preview
autocmd CompleteDone * pclose

" PLUGIN: ALE
" clearer Error and warning signs for the gutter
let g:ale_sign_error = '⤫'
let g:ale_sign_warning = '⚠'
" Enable integration with airline.
let g:airline#extensions#ale#enabled = 1

let g:ale_fix_on_save = 1
let g:ale_fixers = {
      \'javascipt': ['eslint', 'prettier'],
      \'html': ['tidy','prettier'],
      \'typescript': ['prettier','tslint'],
      \'*': ['remove_trailing_lines', 'trim_whitespace'],
      \'go': ['gofmt'],
      \'sh': ['shfmt'],
      \'zsh': ['shfmt'],
      \}

let g:ale_linters = {
      \ 'go': ['gopls'],
      \ 'sh': ['language_server','shellcheck'],
      \ 'zsh': ['language_server','shellcheck'],
      \}

" PLUGIN: AIRLINE
" PLUGIN: TMUXLINE
let g:airline_powerline_fonts=1
" let g:airline_theme='raven'

" Enable italics for colorschemes that support them
let g:gruvbox_italic=1
let g:one_allow_italics=1
let g:pencil_terminal_italics=1

colorscheme one


" disable automatically refreshing the mux statusbar since it breaks tmux
" prefix highlighting. Instead, when changing vim statusbar just create
" snapshot with :TmuxlineSnapshot file and stick it into tmux config manually
let g:airline#extensions#tmuxline#enabled = 1
" custom preset with left-justified window list
let g:tmuxline_preset = {
  \'a'       : '#S',
  \'b'       : '#(whoami)',
  \'c'       : '#I:#P',
  \'win'     : '#I #W',
  \'cwin'    : [' ', '#I #W'],
  \'x'       : '#{?client_prefix,#[fg=colour232]#[bg=brightblue],} %H:%M:%S',
  \'y'       : '%d-%b-%y',
  \'z'       : '#H',
  \'options' : {}}

" automatically save the current buffer when navigating away from vim
let g:tmux_navigator_save_on_switch = 1

" }}}
" VIM SETTINGS {{{
" ================================================================================
"
" set truecolor (neovim)
set termguicolors

" sets tabs to be 2 characters, expanded into spaces, but still removable with
" one press of backspace.
" great explanation: http://vimcasts.org/transcripts/2/en/
set tabstop=2
set shiftwidth=2
set softtabstop=2
set expandtab

" set cursor line highlighting, esp useful when using with bracket
" highlighting and you don't know which side of the brace the cursor is on
set cursorline

" shows linenumbers relative to the one you are on, for easy movement and
" dNUMBERd deletions
set number relativenumber

" keeps an undofile next to files so that you can even undo if vim is closed
" in between
set undofile

" ignores case by default but will use case when search is specifically not
" all lowercased
set ignorecase
set smartcase

" whenever vim loses focus, save
au FocusLost * :wa

" disables showing us the current mode in the command line since airline takes
" care of it
set noshowmode

" highlight everything that goes over 80 columns
highlight ColorColumn ctermbg=magenta
call matchadd('ColorColumn', '\%81v', 100)

" Special setting for editing gopass files - make sure nothing leaks outside
" the directories it is supposed to
au BufNewFile,BufRead /dev/shm/gopass.* setlocal noswapfile nobackup noundofile

function! SearchWiki()
  let l:curpath=getcwd()
  :execute(":cd " . g:wiki_root)
  let l:texttofind=input("Search in Notes: ")
  :execute(":CtrlSF " . l:texttofind)
  :CtrlSFFocus
  :execute(":cd " . l:curpath)
endfunction

" Configure notational-fzf-vim
let g:nv_search_paths = [ g:wiki_root ]
let g:nv_wrap_preview_text=1

" }}}
" KEYBINDINGS {{{
" ================================================================================
"
" Show all mapped keys in a list - from https://stackoverflow.com/questions/13990136/display-a-ordered-vim-keyboard-mapping
function! s:ShowMaps()
  let old_reg = getreg("a")          " save the current content of register a
  let old_reg_type = getregtype("a") " save the type of the register as well
try
  redir @a                           " redirect output to register a
  " Get the list of all key mappings silently, satisfy "Press ENTER to continue"
  silent map | call feedkeys("\<CR>")
  redir END                          " end output redirection
  vnew                               " new buffer in vertical window
  put a                              " put content of register
  " Sort on 4th character column which is the key(s)
  %!sort -k1.4,1.4
finally                              " Execute even if exception is raised
  call setreg("a", old_reg, old_reg_type) " restore register a
endtry
endfunction
" use :ShowMaps to call the function
com! ShowMaps call s:ShowMaps()      " Enable :ShowMaps to call the function

" Begin mapping definitions
runtime! **/maps.vim

" }}}
" ABBREVIATIONS {{{

" Typos
iabbrev adn and
iabbrev waht what
iabbrev tehn then
iabbrev whit with
iabbrev whith with

" Text expansion
iabbrev mo@ marty.oehme@gmail.com
iabbrev mo.me@ <https://martyoeh.me/>
iabbrev mcc@ Copyright 2019 Marty Oehme, all rights reserved.

"
" }}}
" END
" ================================================================================