path: root/vimrc-full

" vim: tabstop=2 softtabstop=2 shiftwidth=2 textwidth=160

set t_Co=256                  | " required on some ssh sessions
" set background=light          | "
" set term=xtermc             | " may be required on solaris
" set term=xterm-256color
" set termguicolors

" START: LOADING PLUGINS
" ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
call plug#begin()

Plug 'tpope/vim-surround'             | " plugin makes cs"' inside a line replace " with '
Plug 'tpope/vim-fugitive'             | " the most complete GIT integration plugin
Plug 'mhinz/vim-signify'              | " uses the sign column to indicate added, modified and removed lines
Plug 'godlygeek/tabular'              | " align code on a sign, like :Tab/=

" TESTING:                            | " plugins which I am currently trying...
" Plug 'rkitover/vimpager'
" Plug 'wting/gitsessions.vim'        | " worth a try: restore sessions based on the git repo you are working in
" Plug 'Shougo/neocomplete.vim'       | " alternative to YouCompleteMe in some cases
" Plug 'tpope/vim-characterize'       | " normal mode: make ga show character names of Unicode chars (ga shows hex and dec values)

" Colorschemes:
Plug 'chriskempson/base16-vim'        | " not just one high quality color scheme (all named base16-*)
Plug 'ryanoasis/vim-devicons'         | " eye candy icons

" SCRATCH:                            | " Unobtrusive scratch window
Plug 'mtth/scratch.vim'
nnoremap <F2> :ScratchPreview<CR>

" VIM_ROOTER:                         | " Unobtrusive scratch window
Plug 'airblade/vim-rooter'            | " makes :lcd changes to projects (git-)root (code-completion, gf, grep, find)

" BUFEXPLORER:                        | " a buffer to list all buffers has the advantage, that default /-searches work in there
Plug 'jlanzarotta/bufexplorer'
nnoremap <F12> :ToggleBufExplorer<CR>
" autocmd BufEnter * lcd %:p:h        | " Plugin vim-rooter get used instead (which is much more sane as well)

" NERDTree: replaces NetRW, as long as it has so many bugs
Plug 'scrooloose/nerdtree'            | "
let NERDTreeIgnore                = ['\.aux$']
let NERDTreeCascadeSingleChildDir = 0 | " I don't get how one can use <m> to create files in that included directory
let NERDTreeChDirMode             = 2
let NERDTreeHiddenFirst           = 1
let NERDTreeMinimalUI             = 1
let NERDTreeShowBookmarks         = 1 | " show bookmarks by default (when opening for the first time)
let NERDTreeWinSize               = 40


" depending on if NERDTree has the focus:
nnoremap <expr>
      \ <leader><leader>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? ':NERDTreeClose<CR>' : ':NERDTreeFind<CR>'
nnoremap <expr>
      \ <Tab>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? '<C-W><C-W>' : ':bn<CR>'
nnoremap <expr>
      \ <S-Tab>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? '<C-W><C-W>' : ':bp<CR>'
" close NERDTree if it is the last remaining window (taken from the official documentation)
" autocmd bufenter *
"       \ if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
"

" Additional: ========================================.
Plug 'sheerun/vim-polyglot'                           " better syntax highlighting/indentation for multiple languages
let g:javascript_conceal_function             = "ƒ"
let g:javascript_conceal_null                 = "ø"
let g:javascript_conceal_this                 = "@"
let g:javascript_conceal_return               = "⇚"
let g:javascript_conceal_undefined            = "¿"
let g:javascript_conceal_NaN                  = "ℕ"
let g:javascript_conceal_prototype            = "¶"
let g:javascript_conceal_static               = "•"
let g:javascript_conceal_super                = "Ω"
let g:javascript_conceal_arrow_function       = "⇒"

Plug 'majutsushi/tagbar'                              " superseeds taglist-plus, which isn't maintained any more
let g:tagbar_autoclose   = 1
let g:tagbar_autofocus   = 1
let g:tagbar_autoshowtag = 1
let g:tagbar_compact     = 0
let g:tagbar_indent      = 0
let g:tagbar_foldlevel   = 99
nnoremap <leader>l :TagbarToggle<CR>|                 " bind TagBar to Hotkey Ctrl+L
nnoremap <F9> :TagbarToggle<CR>|                      " bind TagBar to Hotkey Ctrl+L


" AIRLINE: a fancy status line =========================================================================================
Plug 'vim-airline/vim-airline'                        | " beautification of the mode line
set laststatus=2                                      | " required by AirLine, without status line does not appear until a window split
set background=light
let g:airline_extensions                         = ['tabline', 'branch', 'syntastic', 'whitespace']
let b:airline_whitespace_checks                  = ['indent', 'trailing', 'long', 'mixed-indent-file']
" let g:airline_section_c                          = ""     | " was: %F
let g:airline#extensions#tagbar#flags            = 'f'    | " even though the airline extension is off this controls :h tagbar-extend
let g:airline#extensions#tabline#left_sep        = ' '
let g:airline#extensions#tabline#left_alt_sep    = '      | '
let g:airline#extensions#tabline#fnamemod        = ':t:.' | " let airline just show the filename without its path
let g:airline#extensions#tabline#disable_refresh = 1 |
let g:airline#extensions#tabline#enabled         = 1 |
let g:airline#extensions#tabline#show_buffers    = 1 |
let g:airline#extensions#tabline#show_tabs       = 0 |
let g:airline#extensions#tagbar#enabled          = 0 |
let g:airline#extensions#whitespace#enabled      = 1 |
let g:airline#extensions#wordcount#enabled       = 0 |
let g:airline_detect_modified                    = 1 |
let g:airline_detect_paste                       = 0 |
let g:airline_exclude_preview                    = 1 |
let g:airline_inactive_collapse                  = 1 |
let g:airline_powerline_fonts                    = 1 |
let g:airline_skip_empty_sections                = 1 |
" AIRLINE_Theme:
Plug 'vim-airline/vim-airline-themes'                | " airline themes to match any light and dark terminal using :AirlineTheme
let base16colorspace=256
let g:airline_theme='base16'                   | " specifies which colorscheme should airline uses
" let g:solarized_base16 = 1
" let g:airline_base16_improved_contrast = 1
let g:airline#themes#base16#constant = 0
" let g:airline_theme='badcat'                       | " specifies which colorscheme should airline uses
" let g:airline_theme='papercolor'                   | " specifies which colorscheme should ionirline uses

" Autocompleter: =====================================.
" 
" ULTISNIPS: code snippet ==============================================================================================
Plug 'honza/vim-snippets'                                     " dependency of ultisnips (see below)
Plug 'SirVer/ultisnips'                        " replaces loremipsum (and many more)
"let g:UltiSnipsExpandTrigger       = '<C-j>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
"let g:UltiSnipsJumpForwardTrigger  = '<C-j>'| " \
"let g:UltiSnipsJumpBackwardTrigger = '<C-k>'| " \
"let g:UltiSnipsListSnippets        = '<C-`>'| " YouCompleteMe includes those, so this isn't necessary
"let g:UltiSnipsExpandTrigger       = '<leader><tab>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
"let g:UltiSnipsJumpForwardTrigger  = '<PageDown>'| " \
"let g:UltiSnipsJumpBackwardTrigger = '<PageUp>'| " \
"let g:UltiSnipsListSnippets        = '<leader><leader>'| " YouCompleteMe includes those, so this isn't necessary
" 
" YouCompleteMe: ======================================================================================================
" Plug 'Valloric/MatchTagAlways'                           " highlights the closing tag/brace/...
Plug 'Valloric/YouCompleteMe'
let g:ycm_add_preview_to_completeopt               = 1   " reuse existing preview window
let g:ycm_autoclose_preview_window_after_insertion = 1
let g:ycm_collect_identifiers_from_tags_files      = 1   " Let YCM read tags from Ctags file
let g:ycm_seed_identifiers_with_syntax             = 1   " Completion for programming language's keyword
let g:ycm_complete_in_comments                     = 1   " Completion in comments
let g:ycm_complete_in_strings                      = 1   " Completion in string
let g:ycm_error_symbol                             = '✖' " insert this as an error symbol in the gutter bar
let g:ycm_min_num_of_chars_for_completion          = 1
let g:ycm_use_ultisnips_completer                  = 1   " Default 1, just ensure
let g:ycm_warning_symbol                           = '➔' " insert this as a warning symbol in the gutter bar
let g:ycm_confirm_extra_conf                       = 0   " security is overrated
let g:ycm_key_list_select_completion               = ['<Down>']
let g:ycm_key_list_previous_completion             = ['<Up>']
let g:ycm_global_ycm_extra_conf                    = '~/src/ycm_extra_conf.py'
let g:ycm_semantic_triggers                        = { 'c': [ 're!.' ] }
let g:ycm_python_binary_path                       = 'python' " the python interpreter of choice (for code checking)

" disable <tab>-key for YCM so that it can be used with ultisnips
" let g:ycm_key_list_select_completion=[]
" let g:ycm_key_list_previous_completion=[]
"
" Plug 'rdnetto/YCM-Generator'                        " you better use cmake to generate json build commands, like:
" 'cmake -D CMAKE_EXPORT_COMPILE_COMMANDS=1 ..' can be used to generate a .ycm-extra.conf compatible json file



Plug 'scrooloose/syntastic'
set statusline+=%#warningmsg#
set statusline+=%{SyntasticStatuslineFlag()}
let g:LatexBox_latexmk_preview_continuously = 1
let g:LatexBox_viewer                       = "evince"
let g:syntastic_always_populate_loc_list    = 1
let g:syntastic_auto_loc_list               = 0
let g:syntastic_check_on_open               = 1
let g:syntastic_check_on_wq                 = 0
let g:syntastic_quiet_messages              = {"type":"style"}
" filter ( = do not display) style/formatting errors and warnings
let g:syntastic_error_symbol                = '✖'
let g:syntastic_style_error_symbol          = '✗'
let g:syntastic_warning_symbol              = '➔'
let g:syntastic_style_warning_symbol        = '≈'

Plug 'davidhalter/jedi-vim'               " jedi gets used to display python function signatures
let g:jedi#completions_enabled        = 0 " we do not need completions, because we have YouCompleteMe
let g:jedi#show_call_signatures       = 1 " which sadly does not support signatures like jedi
let g:jedi#show_call_signatures_delay = 0
let g:jedi#auto_vim_configure         = 0
let g:pymode_rope                     = 0 " https://github.com/davidhalter/jedi-vim/issues/163
" autocmd FileType python jedi.preload_module('os', 'sys', 'math')
" let g:pymode_options_max_line_length          = 120
" let g:syntastic_python_flake8_args='--ignore=F821,E302,E501,E241,E301'




call plug#end()                                       | " all plugins are getting loaded on this line, don't remove!
" ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
" END: LOADING PLUGINS


" COLORSCHEME:
" uses the default terminal background color as background (allows transparency)
function! ExtendColorTheme()
  " let g:colors_name=""
  " set background=light
  filetype on
  filetype plugin on
  filetype indent on

  syntax on                     | " enable syntax highlighting
  syntax sync minlines=60       | " how many preceding lines will be parsed? (has performance impact)
  " highlight Normal ctermbg=NONE ctermfg=black

  highlight! CursorLineNr cterm=inverse | " ctermbg=black ctermfg=NONE
  highlight! Pmenu ctermbg=LightYellow ctermfg=blue guibg=LightYellow guifg=blue cterm=italic
  highlight! PmenuSel ctermbg=LightYellow ctermfg=blue guibg=LightYellow guifg=blue gui=inverse cterm=inverse
  highlight! link PmenuSbar Pmenu
  highlight! PmenuThumb cterm=inverse
  highlight! MoreMsg cterm=inverse
  highlight! link Folded LineNr
  highlight! Cursor guibg=green ctermbg=yellow
  highlight! link VertSplit LineNr
  highlight! SpellBad ctermbg=none
endfunction
autocmd ColorScheme * call ExtendColorTheme()


let g:base16_shell_path="~/.config/base16-shell/scripts"
let base16colorspace=256
if filereadable(expand("~/.vimrc_background"))
  source ~/.vimrc_background
else
  colorscheme base16-phd
endif




"=======================================================================================================================
" GENERAL:
"=======================================================================================================================


"=======================================================================================================================
" SPELL_CHECKING:
"=======================================================================================================================
set spell            | " enable spell checker
set spelllang=en,de  | " languages for the spell checker
set spellsuggest=10  | " how many words will z= suggest?
set thesaurus+=/home/max/.vim/thesaurus/php.txt
let g:spellfile_URL='http://ftp.vim.org/vim/runtime/spell'

set dictionary=/usr/share/dict/cracklib-small
set complete+=k " make default completer <C-N> respect the dictionary

"=======================================================================================================================
" SETTINGS:
"=======================================================================================================================
set noautochdir               | " When on, Vim will change the current working directory
set shell=/bin/bash           | " many scripts rely on bash, but its path varies why it is commented out here
set breakindent               | " Every wrapped line will continue visually indented
set clipboard=unnamedplus     | " makes copy and paste work (autoselectplus might work as well)
set cmdheight=2               | " sets the command line's height
set complete+=d               | " scan current and included files for defined name or macro
set complete+=i               | " scan current and included files for completions
set concealcursor=nc          | " limits the display of concealed text to normal and command mode
set conceallevel=2            | " replace escaped chars by their utf-8 representation (useful for LaTeX)
set confirm                   | " asks 'do you want to save?'
set encoding=utf-8            | " set up vim's cosole encoding (not file encoding, for which there is fileencoding=)
set hidden                    | " allows switiching buffers even if the current buffer contains changes (displays +)
set hlsearch                  | " highlights all search matches (not as performant!)
set ignorecase smartcase      | " search with ignorecase by default, but use case sensitive search when one captical char is contained
set lazyredraw                | " disables redraw during macro exectution (improves performance)
set linebreak                 | " wrap long lines at char 'breakat', not inside words
set mouse=n                   | " allow mouse in normal mode only, so one can use the terminals c&p feature in insert mode
set mousemodel=popup          | " only in gvim: right click opens a popup-menu
set nocursorcolumn            | " turn visual cursor column off (improves performance)
set nocursorline              | " turn visual cursor line off (improves performance)
set nrformats+=alpha          | " allows CTRL-A & CTRL-X to increment and decrement letters, not just numbers
set nofoldenable              | " disable code folding. I hate code folding
set foldmethod=syntax         | " foldlevel: syntax, indent, manual
set foldcolumn=1              | " if code folding gets used display it in the clutter bar, where line numbers live
set foldclose=all             | " automatically fold, when the cursor leaves the folded area
set foldopen=all              | " unfold when cursor moves into the closed fold
set foldtext=Foldtext()       | "
set foldnestmax=1             | " top level folding only
set relativenumber            | " relative line numbers can speed up navigation
set noshowmode                | " because we are using some powerline derivat
set nostartofline             | " when scrolling: do not move the cursor to column 1
set notimeout ttimeout        | " improves performance but is known to cause problems on slow terminals
set ttimeoutlen=10            | " set esc key timeout in ms-
set nowrap                    | " but do not (by default) wrap long lines around
set number                    | " turn line numbers on/off (performance decreases when they are shown)
set pumheight=8               | " Determines the maximum number of items to show in the popup menu for
set path+=**                  | " allow recursive searches for files
set redrawtime=400            | " The time in milliseconds for redrawing the display.
" set restorescreen             | " restores the console after exiting vim
" set shada+=n~/.vim/shada      | " shada file to use
set scrolljump=5              | " how many lines get scrolled into view when cursor reaches the screens edge
set splitbelow                | " open new windows below the current one (i find that more intuitive)
set shiftround                | " indent/unindent snaps to multiple of shiftwidth
set showcmd                   | " essential: show keys of combined commands in the lower right corner (BUT SLOW, makes cursor flickering)
" ret noshowcmd                   | " essential: show keys of combined commands in the lower right corner (BUT SLOW, makes cursor flickering)
set winwidth=30               | " keep NERDTreeWindow at least this size
set winminwidth=30            | " (and all other windows, so TODO: watch out)
set tags+=../tags
" set textwidth=100             | " line length (80 used to be default, but...)
set textwidth=120             | " better done with modeline
set colorcolumn=              | " not used, because we have a :match directive for textwidth
set ts=4 sts=4 sw=4 expandtab | " better done with a modeline
set updatetime=1000           | " updates the screen more often
set writedelay=0
set wildmenu                  | " use a menu in the command line
"=======================================================================================================================

" set fillchars+=stlnc:\―       | "


if has('autocmd')
    " autocmd VimEnter * let &t_EI .= "\<Esc>[0 q"
    " autocmd VimEnter * let &t_SI = "\<Esc>]12;green\x7"
    autocmd VimLeave * silent !echo -ne "\033]112\007"
endif

"=======================================================================================================================
if has("multi_byte")
  scriptencoding utf-8       | " tell vim that we are using utf-8 here
  set encoding=utf-8         | " we need default utf-8 encoding to use cool chars as line break and so on (see below)
  set termencoding=&encoding | " once we use special chars we assume everybody uses a terminal supporting those

  set fillchars+=fold:\         | "
  set fillchars+=vert:\│        | " cool vertical split char

  set listchars=             | " initialize empty listchars
  set listchars+=extends:»   | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=precedes:«  | " symbols used when using :set list (which displays non-printable chars)

  set listchars+=tab:⮁\      | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=trail:·     | " symbols used when using :set list (which displays non-printable chars)
  " set listchars+=eol:↲     | " symbols used when using :set list (which displays non-printable chars)
  " set listchars+=space:·   | " symbols used when using :set list (which displays non-printable chars)
  set showbreak+=›           | " symbol used in the beginning of a wrapped line
  set list
end

if has('cscope') " compiled with cscope support?
  " http://vim.wikia.com/wiki/Cscope
  set cscopetag cscopeverbose

  if has('quickfix')
    set cscopequickfix=s-,c-,d-,i-,t-,e-
  endif

  cnoreabbrev csa cs add
  cnoreabbrev csf cs find
  cnoreabbrev csk cs kill
  cnoreabbrev csr cs reset
  cnoreabbrev css cs show
  cnoreabbrev csh cs help

  command! -nargs=0 Cscope cs add $VIMSRC/src/cscope.out $VIMSRC/src
endif

" GUI_VERSION:
if has("gui_running")
  set toolbar+=text
  set guioptions+=eig
  set guioptions-=T   | " toolbar
  set guioptions+=c   | " use console dialogs instead of popups
  set guioptions+=a   | " autoselect: copy&paste using middleclick
  set guioptions-=m   | " remove menu
  set guioptions-=e   | " do not display tabs
  set guioptions-=L   | " do not show left scrollbar
  set guioptions-=r   | " do not show right scrollbar
  set winaltkeys=menu | " behave like other windows: ALT-key can be used to open the menu (and cannot be :remaped)
  set guifont=Dejavu\ Sans\ Mono\ for\ Powerline\ 12
  " set guifont=Droid\ Sans\ Mono\ for\ Powerline\ 12
" set selectmode=mouse,key,cmd  | " enters vim's select mode when pressing shift-left or shift-END
" set keymodel=startsel,stopsel | " makes shift-left, shift-right available for selecting text
endif

" NEOVIM_incompatible:
if !has('nvim')       | " settings which have been removed from neovim
  set ttymouse=xterm2
  set ttyscroll=100   | " improves speed for terminal vim, incomp. with nvim
  set ttyfast         | " improves speed for terminal vim (incomp. with nvim)
  " set termguicolors | " When on, uses highlight-guifg and highlight-guibg attributes in the terminal (=24bit color) incomp. with nvim
endif

if has("autocmd")
  set modeline                | " set variables specific to a file, like indentation by adding a comment
  " set default completion function in case YouCompleteMe cannot help
  set omnifunc=syntaxcomplete#Complete

  " automatically reload this file when it gets edited
  if !exists("*OnConfigChange")
      function OnConfigChange()
          autocmd! |" Remove all vimrc autocommands
          source $MYVIMRC
          AirlineRefresh
      endfunction
      autocmd BufWritePost $MYVIMRC call OnConfigChange()
  endif

  augroup set_window_title " {
    " autocmd BufWinEnter quickfix setl statusline=%t
    " autocmd BufEnter * let &titlestring = hostname() . "[vim(" . expand("%:t") . ")]"
    autocmd CursorHold * let &titlestring = "%t|".$USER."@".hostname().":%{expand(\"%:~:.:h\")}%=%y"
    set title
    " autocmd CursorHold * let &titlestring = "Vim (".airline#extensions#tagbar#currenttag().")"

    " set window title for screen(3)
    if &term == "screen"
      set t_ts=k
      set t_fs=\
    endif
    if &term == "screen" || &term == "xterm"
      set titlelen=40
      set title
    endif
  augroup END

  " hitting K over a keyword shows a help in a buffer.
  " Here we define the commands used to look those keywords up
  " as per file type...
  augroup filetype_specific
    autocmd FileType python setlocal keywordprg=pydoc
    autocmd FileType vim    setlocal keywordprg=:help |.
    autocmd FileType c,cpp  setlocal equalprg=clang-format
    autocmd FileType c,cpp  setlocal breakat-=-

    " keyboard mapping for xml alike languages
    " Alt-Up : Move cursor up one tag
    " Alt-Down: Move cursor down one tag
    " leader-=: tidies currently selected tag and subtags and sorts attributes by name (alphabetically)
    autocmd Filetype html,htmldjango,xml
      \ :nnoremap
              \ <M-Down>
              \ :call search('^ *<', 'e')<CR>:nohlsearch<CR>|
      \ :nnoremap
              \ <M-Up>
              \ :call search('^ *<', 'eb')<CR>:nohlsearch<CR>|
      \ :nnoremap
              \ <leader>=
              \ vat:'<,'>!tidy -xml --wrap 0 --sort-attributes alpha 2>/dev/null<CR>vat=
  augroup END

  augroup ChangeIcon
    "if filereadable("/usr/bin/xseticon")
    "if filereadable("~/.vim/nvim.png")
    " autocmd VimEnter * silent :execute "!xseticon -id $WINDOWID ~/.vim/nvim.png"
    " autocmd VimLeave * silent :execute "!xseticon -id $WINDOWID /usr/share/icons/gnome/32x32/apps/xfce-terminal.png"
    "endif
    "endif
  augroup END

  if has('nvim')
    autocmd TermOpen term://* set nobuflisted
    " use default ESC key to leave insert mode in the internal terminal emulator
    tnoremap <Esc> <C-\><C-n>
  else
    augroup vimonly
      autocmd VimLeave * call system("echo -n $'" . escape(getreg(), "'") . "' | xsel -ib")
    augroup END
  endif

  " use the shada/viminfo file to return the cursor to where it was...
  function! ReturnCursor()
    if line("'\"") > 1 && line("'\"") <= line("$")
      exe "normal! g`\""
    endif
  endfunction
  autocmd! BufReadPost * call ReturnCursor()


  augroup ToggleQuickFix
    function! ToggleQuickFix()
      if exists("g:qwindow")
        lclose
        unlet g:qwindow
      else
        try
          lopen 10
          let g:qwindow = 1
        catch
          echo "No Errors found!"
        endtry
      endif
    endfunction
    function! QFixToggle(forced)
      if exists("g:qfix_win") && a:forced == 0
        cclose
        unlet g:qfix_win
      else
        copen 10
        let g:qfix_win = bufnr("$")
      endif
    endfunction

    nmap <script> <silent> <F3> :call ToggleQuickFix()<CR>
    nmap <script> <silent> <F4> :call QFixToggle(0)<CR>
  augroup END


  augroup extra_whitespace " {
    highlight ExtraWhitespace ctermbg=red ctermfg=white guibg=red
    autocmd BufEnter * syn match ExtraWhitespace /\s\+$/
  augroup END "}

  augroup CurrentFileName
    highlight CurrentFileName ctermbg=yellow guibg=yellow

    let @w = ":execute ':match ColorColumn /\\%>'.&textwidth.'v./'"
    " highlight the current files name inside the document...
    let @g = ":exe ':match CurrentFileName /'.escape(expand('%:t'), '.').'/'"
    " put the current files name after the cursor...
    let @f = ":exe ':normal a'.expand('%:t')"

    " exec current line as a command, insert output of command (from: https://youtu.be/MquaityA1SM?t=35m45s)
    nnoremap Q !!$SHELL<CR>

    " autocmd BufEnter * @f
  augroup END
endif


" ======================================================================================================================
" SHORTCUTS: custom shortcuts
inoremap <C-Space> <C-x><C-o>
"inoremap <C-@> <C-Space>

" Bind CTRL+Backspace to vims version (CTRL+W) in " <CR> insert mode (only works with gvim)
inoremap
      \ <C-Backspace>
      \ <C-W>

" INDENTATION: allows deindenting a selected block and keeps selection
vnoremap < <gv
vnoremap > >gv

" close current buffer with <leader>q...
nnoremap <leader>q :bp<bar>sp<bar>bn<bar>bd<CR>.

nnoremap <silent> <F5> :make<CR>
nnoremap <silent> <F6> :silent syntax sync fromstart<CR>:nohlsearch<CR>:silent match<CR>
nnoremap <leader>r :syntax sync fromstart


" INSERT_MODE_MAPPINGS:
" default copy&paste insert key binding (just in insert mode, so it doesn't conflict
" with visual block mode).
inoremap <C-V> <C-R>+
inoremap <C-S> <C-O>:w<CR>

" NEOVIM_SPECIFIC:
if has('nvim') " only neovim...
  " shortcut \t opens a terminal in a horizontal split
  nnoremap <leader>t :new +terminal<CR>
endif

" ======================================================================================================================
" Deprecated with this configuration, but still useful when deactivating some Plugins

" NETRW: obsolete with NERDTree
let g:netrw_alto          = 0       | " open files on the right
let g:netrw_altv          = 1       | " open files on the right
let g:netrw_banner        = 0       | " display help messages?
let g:netrw_browse_split  = 4       | " 4=open in previous window
let g:netrw_fastbrowse    = 2       | " manually refresh direcory list (avoids display errors)
let g:netrw_hide          = 1       | " show not-hidden files only
let g:netrw_keepdir       = 0
let g:netrw_list_hide     = '^\..*' | " Explore mode: hide files starting with dot
let g:netrw_liststyle     = 3       | " 3=tree
let g:netrw_preview       = 0       | "
let g:netrw_winsize       = 20      | " window size in percent

" au BufNewFile,BufRead,BufEnter *.cpp,*.hpp set omnifunc=omni#cpp#complete#Main
" Enable omni completion.
" autocmd FileType css setlocal omnifunc=csscomplete#CompleteCSS
" autocmd FileType html,markdown setlocal omnifunc=htmlcomplete#CompleteTags
" auto complete closing tag name when entering </-[space]
" autocmd Filetype html,markdown,xml iabbrev </ </<C-X><C-O>
" autocmd FileType python setlocal omnifunc=jedi#completions
" following autocommands are there to call neovim functions...
" autocmd FileType python setlocal omnifunc=pythoncomplete#Complete
" autocmd FileType javascript setlocal omnifunc=javascriptcomplete#CompleteJS
" autocmd FileType xml setlocal omnifunc=xmlcomplete#CompleteTags
"
" set termguicolors