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('~/.vim/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
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'

" " 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)

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.


" " Ecosystem
" " Plug 'tpope/vim-fugitive' - Will have to take a closer look some other time
Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' } " show a directory listing within vim
Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': 'NERDTreeToggle' } " show git status in nerdtree for files and dirs
Plug 'Yggdroot/LeaderF', { 'on': ['Leaderf', 'LeaderfFile', 'LeaderfBuffer'], 'do': './install.sh' } " fuzzy matcher, apparently faster than fzf, ctrlp, unit, denite

" 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'}

" 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

" Markdown & Prose Workflow
Plug 'reedes/vim-pencil', { 'for': ['mkd', 'txt'], 'on': 'Goyo' } " provide md convenience functions like hard/softwrap
Plug 'junegunn/goyo.vim', { 'for': ['mkd', 'txt'], 'on': 'Goyo' } " provide distraction free writing
Plug 'junegunn/limelight.vim', { 'for': ['mkd', 'txt'], 'on': 'Goyo' } " provide even distraction free-er writing (lowlight paragraphs)
Plug 'rhysd/vim-grammarous', { 'for': ['mkd', 'txt'], 'on': 'Goyo' } " integrate vim with languagetool for grammar checking (needs java8)

" For async completion
Plug 'Shougo/deoplete.nvim', { 'on': [] } " automatic suggestions, can also perhaps be changed for newer plugs
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')
                     \| autocmd! load_ide_features
  autocmd InsertEnter * call deoplete#enable()
augroup END

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

" Colorschemes
Plug 'Nequo/vim-allomancer'
Plug 'morhetz/gruvbox'
Plug 'nightsense/snow'

call plug#end()
endif

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

" 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
" set .markdown, .md to both use the default mkd filetype which vim-markdown
" uses as its syntax
au! BufRead,BufNewFile *.markdown set filetype=mkd
au! BufRead,BufNewFile *.md       set filetype=mkd
" automatically enables markdown plugins for md files, as well as plaintext
augroup markdown
  autocmd!
  autocmd FileType mkd  call pencil#init()
  autocmd FileType txt  call pencil#init()
augroup END
" enable syntax highlighting for codeblocks WITHIN markdown
let g:markdown_fenced_languages = ['html', 'python', 'bash=sh', 'javascipt', 'go']

" PLUGIN: vim-textobj-sentence
" enable extended sentence textobject use on md and plaintext files
augroup textobj_sentence
  autocmd!
  autocmd FileType mkd call textobj#sentence#init()
  autocmd FileType txt call textobj#sentence#init()
augroup END

" 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()

" 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: ALE
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'],
        \}

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

" 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 = 0
" 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'       : '#{prefix_highlight} %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)

" }}}
" ================================================================================
" KEYBINDINGS {{{
" ================================================================================
"
" set our leader key to space since with hjkl, space is largely useless
let mapleader = "\<Space>"
" set jk to escape, in case capslock is not mapped to escape on the system
inoremap jk <ESC>

" remove search highlights by pressing space+/ - the key for searching the
" first place
nnoremap <leader>/ :noh<cr>

" move around between matching brackets with tab
nnoremap <tab> %
nnoremap <tab> %

" select the whole buffer with <leader>-a
map <leader>a ggVG

" quickly edit vimrc with leader+V
map <leader>V :vsp ~/.config/nvim/init.vim<cr>
" automatically source the vimrc file whenever it is saved (causes slowdown
" when done in MANY successions)
" au BufWritePost init.vim so ~/.config/nvim/init.vim

" get rid of the help message popping up when I miss esc and hit F1
nnoremap <F1> <ESC>
inoremap <F1> <ESC>
vnoremap <F1> <ESC>

" remove all trailing whitespaces
" on pressing space+W
nnoremap <leader>W :%s/\s\+$//<cr>:let @/=''<CR>
" automatically on saving
" autocmd BufWritePre * :%s/\s\+$//e


" 'open new tab' with leader-t (opens new buffer and switches to it)
" open actual new tab with leader-T
nnoremap <leader>t :vsp .<cr>
nnoremap <leader>T :tabedit .<cr>

" save current buffer with Ctrl-s
nnoremap <C-s> :w<cr>

" open/close NERDtree with leader-e
" whatever method tree has been opened by, leader-e closes it again
nnoremap <leader>e :NERDTreeToggle<CR>
" open root of current VCS project in tree
nnoremap <leader><C-e> :NERDTreeVCS<CR>
" open current nerdtree with current file highlighted
nnoremap <leader>E :NERDTreeFind<CR>

" Mostly dealing with Prose writing from here on out
" Format current Paragraph (esp useful in prose writing)
nnoremap <silent> <leader>q gqap
xnoremap <silent> <leader>q gq
nnoremap <silent> <leader>Q vapJgqap

" Enter distraction free prose mode with F11
noremap <F11> :Goyo<CR>

" Call leaderf with <leader-f> (necessary to enable leaderf lazyloading)
nnoremap <leader>f :LeaderfFile<cr>
nnoremap <leader>F :LeaderfBuffer<cr>

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