" ~nebula/.vimrc (2018-2023, public domain)

" table of contents:
"   <INI> setup
"   <VIM> vim settings
"   <PLG> plugins
"   <LNG> language-specific behavior

" <INI> setup ------------------------------------

" initialization stuff
set nocompatible
set encoding=utf-8

" plugin management
execute pathogen#infect()
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'VundleVim/Vundle.vim'
Plugin 'vim-airline/vim-airline'
Plugin 'vim-airline/vim-airline-themes'
Plugin 'airblade/vim-gitgutter'
Plugin 'tpope/vim-sleuth'
Plugin 'eslint/eslint'
call vundle#end()

" <VIM> vim settings -----------------------------

" indentation & wrapping
set   tabstop=4 shiftwidth=4 expandtab
set   autoindent
set nosmartindent  " also overridden per language
set   smarttab shiftround
set nowrap
set   linebreak
set   breakindent
set   showbreak=\ ↳\ "

" editor behavior
filetype indent off
set   autoread
set   hidden
set   backspace=indent,eol,start
set   mouse=a ttymouse=xterm2
set   ttimeout ttimeoutlen=50

" editor appearance
colorscheme molokai
syntax off
set   background=dark
set   colorcolumn=+1
set   cursorline
set   laststatus=2
set   list listchars=trail:▓
set   number
set   scrolloff=5 sidescrolloff=8
set   showcmd
set noshowmode  " airline shows mode already
set   wildmenu

" search
set   hlsearch
set   ignorecase smartcase
set noincsearch

" writing behavior
set   nobackup nowritebackup noswapfile
set   fileformats=unix,dos,mac

" keyboard shortcuts
nnoremap <C-f> /
nnoremap <C-s> :w<CR>
inoremap <C-s> <C-o>:w<CR>

" restore previous scroll position
fun! RestoreScrollPosition()
  " always start editing certain files at the top
  if &ft =~ 'gitcommit'
    return
  endif
  g`"zv   " this is the actual restore-scroll part
endfun
autocmd BufReadPost * silent! normal! :call RestoreScrollPosition()

" spooky vim backups stolen from official example config
if has("vms")
  set nobackup    " do not keep a backup file, use versions instead
else
  set backup      " keep a backup file (restore to previous version)
  if has('persistent_undo')
    set undofile  " keep an undo file (undo changes after closing)
  endif
endif

" disable default language-specific indentation behavior
" (this doesn't actually work as an autocmd, instead copy-paste
" this into ~/.vim/indent/<filetype>.vim files)
" let b:did_indent = 1

" only allow a few syntax highlighting colors
hi NonText          ctermbg=NONE ctermfg=NONE cterm=NONE
hi Visual           ctermbg=fg   ctermfg=bg cterm=NONE
hi Boolean          ctermbg=NONE ctermfg=NONE cterm=NONE
hi Character        ctermbg=NONE ctermfg=NONE cterm=NONE
hi Comment          ctermbg=NONE ctermfg=45 cterm=NONE
hi Conditional      ctermbg=NONE ctermfg=NONE cterm=NONE
hi Constant         ctermbg=NONE ctermfg=NONE cterm=NONE
hi Delimiter        ctermbg=NONE ctermfg=NONE cterm=NONE
hi Error            ctermbg=NONE ctermfg=NONE cterm=reverse
hi Exception        ctermbg=NONE ctermfg=NONE cterm=NONE
hi Float            ctermbg=NONE ctermfg=NONE cterm=NONE
hi Function         ctermbg=NONE ctermfg=NONE cterm=NONE
hi Identifier       ctermbg=NONE ctermfg=NONE cterm=NONE
hi Ignore           ctermbg=NONE ctermfg=NONE cterm=NONE
hi Keyword          ctermbg=NONE ctermfg=NONE cterm=NONE
hi Label            ctermbg=NONE ctermfg=NONE cterm=NONE
hi Number           ctermbg=NONE ctermfg=NONE cterm=NONE
hi Operator         ctermbg=NONE ctermfg=NONE cterm=NONE
hi PreProc          ctermbg=NONE ctermfg=NONE cterm=NONE
hi Repeat           ctermbg=NONE ctermfg=NONE cterm=NONE
hi Special          ctermbg=NONE ctermfg=NONE cterm=NONE
hi SpecialChar      ctermbg=NONE ctermfg=NONE cterm=NONE
hi Statement        ctermbg=NONE ctermfg=NONE cterm=NONE
hi StorageClass     ctermbg=NONE ctermfg=NONE cterm=NONE
hi String           ctermbg=NONE ctermfg=NONE cterm=NONE
hi Title            ctermbg=NONE ctermfg=NONE cterm=NONE
hi Todo             ctermbg=NONE ctermfg=DarkGray cterm=underline
hi Type             ctermbg=NONE ctermfg=NONE cterm=NONE
hi Underlined       ctermbg=NONE ctermfg=DarkGray cterm=underline
hi Search           ctermbg=DarkGray ctermfg=white cterm=NONE
hi link gitcommitOverflow Error
hi htmlItalic       ctermbg=NONE ctermfg=NONE cterm=underline

" <PLG> plugin settings --------------------------

" airline
" let g:airline_theme='minimalist'
let g:airline_theme='zenburn'
"                    distinguished (grey yellow)
"                    peaksea (grey)
"                    molokai (molokai)
"                    minimalist (nice)
"                    luna (wof)
"                    zenburn (grey good contrast)
let g:airline_powerline_fonts = 1
let g:airline#extensions#tabline#enabled = 1

" ale

" Only lint if .eslintrc is present
autocmd BufEnter,BufNew *.js let g:ale_linters = FindGlob('.eslintrc.*', expand('%:p:h')) ? {'javascript': ['eslint']} : {'javascript': ['']}

function! g:FindGlob(pattern, path)
  let fullpattern = a:path . "/" . a:pattern
  if strlen(glob(fullpattern))
    return 1
  else
    let parts = split(a:path, "/")
    if len(parts)
      let newpath = "/" . join(parts[0:-2], "/")
      return FindGlob(a:pattern, newpath)
    else
      return 0
    endif
  endif
endfunction

" <LNG> language specific behavior ---------------

" indent options for particular languages
autocmd FileType javascript set smartindent
autocmd FileType c,cpp,h,hpp set smartindent

" word wrap javascript comments
autocmd BufEnter,BufNew *.js autocmd CursorMoved,CursorMovedI * :if match(getline('.'), '^\s*//') == 0 | :setlocal textwidth=80 | :else | :setlocal textwidth=0 | :endif

" yaml overrides
au FileType yaml setlocal indentexpr=
au FileType yaml nmap <buffer> { ?---\+<CR>
au FileType yaml nmap <buffer> } /---\+<CR>

" start git commits in insert mode (wrong and evil)
" au BufNewFile,BufRead COMMIT_EDITMSG,MERGE_MSG,TAG_EDITMSG  :startinsert!
" au BufNewFile,BufRead NOTES_EDITMSG,EDIT_DESCRIPTION        :startinsert!