dotconfs/.config/nvim/init.vim

set mouse=
call plug#begin('~/.config/nvim/plugged')

" Plugins {
    " neo-tree is a file finder.
    "Plug 'nvim-neo-tree/neo-tree.nvim'
    " Requirement for neo-tree
    "Plug 'nvim-lua/plenary.nvim'
    "Plug 'nvim-tree/nvim-web-devicons'
    "Plug 'MunifTanjim/nui.nvim'
    " airline is a better status line and a tab-bar for nvim.
    Plug 'bling/vim-airline'
    " gruvbox colorscheme. Seems to work the best for me.
    Plug 'morhetz/gruvbox'
    " neomake is a code linting tool that runs in the background.
    Plug 'neomake/neomake'
    "autocompletion Plugin for Code autocomplete
    Plug 'zchee/deoplete-jedi'
    " Left side File Tree
    Plug 'scrooloose/nerdtree'
    " Adds filetype-specific icons to NERDTree files and folders,
    Plug 'ryanoasis/vim-devicons'
    " Adds syntax highlighting to NERDTree based on filetype.
    Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
    "
    " fzf fuzzy finder for the current directory
    Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
    " whichkey shows with space which keys you can press
    Plug 'folke/which-key.nvim'
    " firenvim ist ein socket um den browser editor durch nvim zu ersetzen
    Plug 'glacambre/firenvim', { 'do': { _ -> firenvim#install(0) } }
" install with nvim +PlugInstall +qall
" update with nvim +PlugUpgrade +PlugUpdate +PlugClean +qall
" you can also update it in nvim with syntax autocompletion and stuff - simply
" call PlugUpdate as an example
" }

call plug#end()

" Map the leader key to ,
let mapleader="\<SPACE>"

" General {
    set noautoindent        " I indent my code myself.
    set nocindent           " I indent my code myself.
    "set smartindent        " Or I let the smartindent take care of it.
    set breakindent         " Indent line-breaks at the same level as code.
    set ttimeoutlen=100
    set fileencoding=utf-8
    set fileencodings=utf-8,gbk,chinese,cp936,gb18030,utf-16le,utf-16,big5,euc-jp,euc-kr,latin-1
" }

" Search {
    set ignorecase          " Make searching case insensitive
    set smartcase           " ... unless the query has capital letters.
    set gdefault            " Use 'g' flag by default with :s/foo/bar/.

    " Use <C-L> to clear the highlighting of :set hlsearch.
    if maparg('<C-L>', 'n') ==# ''
        nnoremap <silent> <C-L> :nohlsearch<CR><C-L>
    endif
" }

" Spellcorrection {
    setlocal spell spelllang=en_us
    "setlocal spell spelllang=de_20
    map <F7>  :setlocal spell spelllang=de_20 <return>
    map <F8>  :setlocal spell spelllang=en_us <return>
    map <F9>  :w!<CR>:!aspell check %<CR>:e! %<CR>


" Formatting {
    set showmatch             " Show matching brackets.
    set number relativenumber " Show the line numbers on the left side.
    set formatoptions+=o      " Continue comment marker in new lines.
    set expandtab             " Insert spaces when TAB is pressed.
    set tabstop=4             " Render TABs using this many spaces.
    set shiftwidth=4          " Indentation amount for < and > commands.

    set nojoinspaces        " Prevents inserting two spaces after punctuation on a join (J)

    " More natural splits
    set splitbelow          " Horizontal split below current.
    set splitright          " Vertical split to right of current.

    if !&scrolloff
        set scrolloff=3       " Show next 3 lines while scrolling.
    endif
    if !&sidescrolloff
        set sidescrolloff=5   " Show next 5 columns while side-scrolling.
    endif
    set nostartofline       " Do not jump to first character with page commands.

    " Tell Vim which characters to show for expanded TABs,
    " trailing whitespace, and end-of-lines. VERY useful!
    if &listchars ==# 'eol:$'
        set listchars=tab:>\ ,trail:-,extends:>,precedes:<,nbsp:+
    endif
    set list                " Show problematic characters.
" }

" Configuration {
    set autochdir           " Switch to current file's parent directory.

    " Remove special characters for filename
    set isfname-=:
    set isfname-==
    set isfname-=+

    " Map ; to :
    nnoremap ; :

    " Path/file expansion in colon-mode.
    set wildmode=list:longest

    " Allow color schemes to do bright colors without forcing bold.
    if &t_Co == 8 && $TERM !~# '^linux'
        set t_Co=16
    endif

    " Remove trailing spaces.
    function! TrimWhitespace()
        let l:save = winsaveview()
        %s/\s\+$//e
        call winrestview(l:save)
    endfunction
    " FIXME: Do not call this on makefile and sv files.
    autocmd BufWritePre * call TrimWhitespace()
    nnoremap <leader>W :call TrimWhitespace()<CR>

    " Diff options
    set diffopt+=iwhite

    "Enter to go to EOF and backspace to go to start
    "nnoremap <CR> G
    "nnoremap <BS> gg
    " Stop cursor from jumping over wrapped lines
    nnoremap j gj
    nnoremap k gk
    " Make HOME and END behave like shell
    "inoremap <C-E> <End>
    "inoremap <C-A> <Home>
" }

" UI Options {
    " Colorscheme options.
    set bg=dark
    colorscheme gruvbox

    " Also highlight all tabs and trailing whitespace characters.
    highlight ExtraWhitespace ctermbg=darkgreen guibg=darkgreen
    match ExtraWhitespace /\s\+$\|\t/

    " Relative numbering
    function! NumberToggle()
        if(&relativenumber == 1)
            set nornu
            set number
        else
            set rnu
        endif
    endfunc

    " Toggle between normal and relative numbering.
    nnoremap <leader>r :call NumberToggle()<cr>

    " Opaque Background (Comment out to use terminal's profile)
    "set termguicolors

    " Transparent Background (For i3 and compton)
    "highlight Normal guibg=NONE ctermbg=NONE
    "highlight LineNr guibg=NONE ctermbg=NONE
" }

" Keybindings {
    " Save file
    nnoremap <Leader>w :w<CR>

    " Copy and paste from system clipboard (Might require xsel/xclip install)
    vmap <Leader>y "+y
    vmap <Leader>d "+d
    nmap <Leader>p "+p
    nmap <Leader>P "+P
    vmap <Leader>p "+p
    vmap <Leader>P "+P

    " Move between buffers
    nmap <Leader>h :bprevious<CR>

    " Switch between Buffers
    map <C-j> <C-w>j<C-w>_
    map <C-k> <C-w>k<C-w>_
    map <C-h> <C-w>h<C-w>_
    map <C-l> <C-w>l<C-w>_

    " Switch between tabs
    map <A-h> :tabprevious<CR>
    map <A-l> :tabnext<CR>

    " Go to tab by number
    noremap <A-1> 1gt
    noremap <A-2> 2gt
    noremap <A-3> 3gt
    noremap <A-4> 4gt
    noremap <A-5> 5gt
    noremap <A-6> 6gt
    noremap <A-7> 7gt
    noremap <A-8> 8gt
    noremap <A-9> 9gt
    noremap <A-0> :tablast<cr>

    " Open init.vim
    map <silent> <leader>ee :e $HOME/.config/nvim/init.vim<cr>

    " Open a File in new Tab
     map <silent> <leader>t  :tabnew
" }


" Experimental {
    " Search and Replace
    nmap <Leader>s :%s//g<Left><Left>
    " write files as root (if you've forgotten to open it as root
    " simply do :W instead of :w
    command W :execute ':silent w !sudo tee % > /dev/null' | :edit!
" }

" Plugin Settings {
    " Plug {
    autocmd VimEnter *
  \  if len(filter(values(g:plugs), '!isdirectory(v:val.dir)'))
  \|   PlugInstall --sync | q
  \| endif
    " }
    " Airline {
        let g:airline#extensions#tabline#enabled = 1
        let g:airline#extensions#tabline#buffer_idx_mode = 1
        let g:airline#extensions#tabline#fnamemod = ':t'
        let g:airline#extensions#tabline#left_sep = ''
        let g:airline#extensions#tabline#left_alt_sep = ''
        let g:airline#extensions#tabline#right_sep = ''
        let g:airline#extensions#tabline#right_alt_sep = ''
        let g:airline_left_sep = ''
        let g:airline_left_alt_sep = ''
        let g:airline_right_sep = ''
        let g:airline_right_alt_sep = ''
        let g:airline_theme= 'gruvbox'
    " }
    " neomake {
        autocmd! BufWritePost * Neomake
        nnoremap <Leader>l :lopen<CR>
    " }
    " netrw {
        let g:netrw_liststyle=3 " tree (change to 0 for thin)
        let g:netrw_banner=0    " no banner
        let g:netrw_altv=1      " open files on right
        let g:netrw_winsize=25  " only use 20% screen for netrw
        " FIXME: Preview opens to left and is very narrow
        let g:netrw_preview=1   " open previews vertically
        let g:netrw_browse_split =3 " open files in new Tab
        nmap <Leader>n :Vexplore<CR>
    " }
" }

    " Filetype-Specific Configurations {
        " HTML, XML, Jinja
        autocmd FileType html setlocal shiftwidth=2 tabstop=2 softtabstop=2
        autocmd FileType css setlocal shiftwidth=2 tabstop=2 softtabstop=2
        autocmd FileType xml setlocal shiftwidth=2 tabstop=2 softtabstop=2
        autocmd FileType htmldjango setlocal shiftwidth=2 tabstop=2 softtabstop=2
        autocmd FileType htmldjango inoremap {{ {{  }}<left><left><left>
        autocmd FileType htmldjango inoremap {% {%  %}<left><left><left>
        autocmd FileType htmldjango inoremap {# {#  #}<left><left><left>
    " }

    " Markdown and Journal {
        autocmd FileType markdown setlocal shiftwidth=2 tabstop=2 softtabstop=2
        autocmd FileType journal setlocal shiftwidth=2 tabstop=2 softtabstop=2
    " }

    " Trim Whitespaces {
        function! TrimWhitespace()
            let l:save = winsaveview()
            %s/\\\@<!\s\+$//e
            call winrestview(l:save)
        endfunction
    " }
" vim:set ft=vim sw=4 ts=4:
" :set number relativenumber

:augroup numbertoggle
:  autocmd!
:  autocmd BufEnter,FocusGained,InsertLeave * set relativenumber
:  autocmd BufLeave,FocusLost,InsertEnter   * set norelativenumber
:augroup END
noremap <F3> :set invnumber invrelativenumber<CR>
inoremap <F3> <C-O>:set invnumber invrelativenumber<CR>