.vimrc

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"" yavc: yet another vim configuration
"" -----------------------------------
"" compiled by Stephen Lester
""
"" requirements & setup
"" --------------------
"" ripgrep              https://github.com/BurntSushi/ripgrep
"" Vundle               https://github.com/gmarik/Vundle.vim
"" ncurses5-compat-libs (Arch Linux, for YCM)
"" ~/.tmux.conf         set -g escape-time 10
""
"" table of contents
"" -----------------
"" 0. requirements
"" 1. plugins
"" 2. general
"" 3. text-related
"" 4. searching
"" 5. moving
"" 6. files
"" 7. interface
"" 8. keymaps
"" 9. plugin settings
"" 10. helper functions & autocommands
""
"" ...................................
""
"" custom shortcuts
""
"" ,,         clear search
"" ,pp        toggle paste mode
"" ,tn        new tab
"" ,to        only tab
"" ,tc        close tab
"" ,tm        move tab
""
"""""""""""""""""""""""""""""""""""""""""""""""""

""
"" 0. requirements
""
set nocompatible
let mapleader = ","

""
"" 1. plugins
""
" Autoload vimplug if needed.
if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')
Plug 'MarcWeber/vim-addon-mw-utils'       " collection of small functions
Plug 'Shougo/vimproc.vim',                " multiple processes
       \{'do': 'make'}
Plug 'airblade/vim-gitgutter'             " git symbols in gutter
Plug 'bling/vim-airline'                  " fancy airline down below
Plug 'godlygeek/tabular'                  " easy alignment
Plug 'juanedi/predawn.vim'                " colorscheme
Plug 'kien/rainbow_parentheses.vim'
Plug 'neomake/neomake'
Plug 'scrooloose/nerdtree'                " better file browser
Plug 'sheerun/vim-polyglot'               " syntax files
Plug 'tomtom/tcomment_vim'                " toggling of comments
Plug 'valloric/youcompleteme',            " autocompletion
       \{ 'do': './install.py' } 
call plug#end()

""
"  2. general
""
set noerrorbells                          " No.
set novisualbell                          " Bells.
set t_vb=                                 " EVER.
set tm=500                                " (Mommy Dearest reference.)
set nohidden                              " Clear the buffer after closing a tab.
set ttyfast                               " Smooth redrawing.

""
"  3. text-related
""
set autoindent                            " Indent text automatically.
set expandtab                             " Use spaces, not the tab character.
set tabstop=2                             " Tab width is 4 spaces.
set shiftwidth=2
set magic                                 " Use special chars in regex.
set undolevels=1000                       " Allow 1000 undos.
set backspace=2                           " Make backspace work!
set formatoptions-=cro                    " Don't continue comments.

syntax enable                             " Syntax highlighting.
set grepprg=ag\ -s\ $*                    " Use ag for grep.

""
"  4. searching
""
set hlsearch                              " Highlight search results.
set ignorecase                            " Ignore case when searching.
set smartcase                             " (except when capital letters are typed!)
set incsearch                             " Search updates as you type.
set viminfo="h"                           " Don't highlight the last search upon startup.

" *,# searches for current selection in visual mode
vnoremap <silent> * :call VisualSelection('f')<CR>
vnoremap <silent> # :call VisualSelection('b')<CR>

" Use ripgrep when searching
if executable("rg")
    set grepprg=rg\ --vimgrep\ --no-heading
    set grepformat=%f:%l:%c:%m,%f:%l:%m
endif

""
"  5. moving
""
" When using j/k to move, treat wrapped
map j gj
" lines as separate lines.
map k gk

""
"  6. files
""

""
"  7. interface
""
highlight LineNr ctermfg=darkgrey
set background=dark                       " I'm a vampire.
set foldmethod=marker                     " Mark folds
set lazyredraw                            " Don't redraw when executing macros.
set laststatus=2                          " Always show the status line
set number                                " Show line number.
set report=0                              " Show how many lines were changed.
set ruler                                 " Show current position.
set scrolloff=5                           " Keep at least 5 lines above/below
set sidescrolloff=5                       " Keep at least 5 lines left/right
set showcmd                               " Shows the command you're typing.
set showmatch                             " Highlight matching brackets.
highlight MatchParen ctermbg=4
set showmode                              " Show current mode in statusbar.
set wildmenu                              " Tab completion when typing.
set wildignore=*.o,*~,*.bk,*.pyc          " Ignore backup / compiled files.
set wildmode=list:longest,full
set t_ut=                                 " Fix background color in tmux.

" Status line format.
set statusline=\ %{HasPaste()}%F%m%r%h\ %w\ \ CWD:\ %r%{getcwd()}%h\ \ \ Line:\ %l

" Color scheme.
colorscheme predawn

""
"  8. keymaps
""
" ; mapped to :
noremap ; :

" ,, to clear search highlight
nmap <silent> <Leader><Leader> :nohlsearch<CR>

" ,f to open NERDTree
nmap <silent> <Leader>f :NERDTree<CR>

" Mappings for tabs.
map <Leader>ta :tab all<cr>
map <Leader>tn :tabnew<cr>
map <Leader>to :tabonly<cr>
map <Leader>tc :tabclose<cr>
map <Leader>tm :tabmove

" Toggle paste mode on and off.
map <Leader>pp :setlocal paste!<cr>

" jk to escape insert mode quickly.
imap jk <Esc>

""
"  9. plugin settings
""
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1
let g:airline_detect_paste = 1

set statusline+=%#warningmsg#
set statusline+=%*

""
"  10. helper functions & autocommands
""
" Autoremove trailing whitespace.
autocmd BufRead,BufWrite * if ! &bin | silent! %s/\s\+$//ge | endif

" Don't autoinsert comments
autocmd BufNewFile,BufRead * setlocal formatoptions-=cro

" Restore cursor position to where it was before
augroup JumpCursorOnEdit
   au!
   autocmd BufReadPost *
            \ if expand("<afile>:p:h") !=? $TEMP |
            \   if line("'\"") > 1 && line("'\"") <= line("$") |
            \     let JumpCursorOnEdit_foo = line("'\"") |
            \     let b:doopenfold = 1 |
            \     if (foldlevel(JumpCursorOnEdit_foo) > foldlevel(JumpCursorOnEdit_foo - 1)) |
            \        let JumpCursorOnEdit_foo = JumpCursorOnEdit_foo - 1 |
            \        let b:doopenfold = 2 |
            \     endif |
            \     exe JumpCursorOnEdit_foo |
            \   endif |
            \ endif
   " Need to postpone using "zv" until after reading the modelines.
   autocmd BufWinEnter *
            \ if exists("b:doopenfold") |
            \   exe "normal zv" |
            \   if(b:doopenfold > 1) |
            \       exe  "+".1 |
            \   endif |
            \   unlet b:doopenfold |
            \ endif
augroup END

" Don't use default clipboard register.
if system('uname') =~ 'Darwin'
  set clipboard=unnamed
else
  set clipboard=unnamedplus
endif

" Returns true if paste mode is enabled
function! HasPaste()
  if &paste
    return 'PASTE MODE  '
  endif
  return ''
endfunction