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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Credit:
" Amir Salihefendic — @amix3k
" https://github.com/amix/vimrc/blob/master/vimrcs/basic.vim
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => General
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
set nocompatible

" Sets how many lines of history VIM has to remember
set history=500

" Enable filetype plugins
filetype plugin on
filetype indent on

" Set to auto read when a file is changed from the outside
set autoread

" Disable modelines for better security
set modelines=0
set nomodeline

" With a map leader it's possible to do extra key combinations
" like <leader>w saves the current file
let mapleader = ","

" Fast saving
nnoremap <leader>w :w!<cr>

" :W sudo saves the file
" (useful for handling the permission-denied error)
command! W w !sudo tee % >/dev/null


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => VIM user interface
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
set mouse=a
set ignorecase
set smartcase
set hlsearch
set incsearch

" Set 7 lines to the cursor - when moving vertically using j/k
set scrolloff=7

" Turn on the Wild menu
set wildmenu

" Ignore compiled files
set wildignore=*.o,*~,*.pyc
set wildignore+=*/.git/*,*/.hg/*,*/.svn/*,*/.DS_Store

" Height of the command bar
set cmdheight=1

" A buffer becomes hidden when it is abandoned
set hidden

" Configure backspace so it acts as it should act
set backspace=eol,start,indent
set whichwrap+=<,>,h,l

" Don't redraw while executing macros (good performance config)
set lazyredraw

" For regular expressions turn magic on
set magic

" Show matching brackets when text indicator is over them
set showmatch
" How many tenths of a second to blink when matching brackets
set matchtime=2

" No annoying sound on errors
set noerrorbells
set novisualbell
set t_vb=
set timeoutlen=500

" Properly disable sound on errors on MacVim
if has("gui_macvim")
    autocmd GUIEnter * set vb t_vb=
endif

" Add a bit extra margin to the left
set foldcolumn=1

" Highlight the current line
set cursorline

set listchars=tab:>\ ,trail:-,extends:>,precedes:<,nbsp:+


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Colors and Fonts
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
syntax enable

set t_Co=256
if $COLORTERM == 'truecolor'
    set termguicolors
endif
if &term =~# '^screen'
    " Set terminal sequences for true colors (:help xterm-true-color)
    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
endif

colorscheme flattened_light

if has("gui_running")
    set guioptions-=T  " No toolbar
    set guioptions-=e  " No GUI tabs
    set guioptions-=m  " No menu bar
    set guioptions-=l  " No left scrollbar
    set guioptions-=L  " No left scrollbar
    set guioptions-=r  " No right scrollbar
    set guioptions-=R  " No right scrollbar
    set guifont=IBM\ Plex\ Mono\ Medium\ 11
    set guitablabel=%M\ %t
    set guicursor+=a:blinkoff0  " Disable cursor blinking
endif


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Files, backups and undo
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
set encoding=utf8
set fileformats=unix,dos,mac

" Turn backup off
set nobackup
set nowritebackup
set noswapfile


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Text, tab and indent related
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
set smarttab
set tabstop=8

set autoindent
set smartindent
set wrap

set linebreak
set formatoptions+=m  " Break at multi-byte characters (e.g., CJK)
set formatoptions+=j  " Delete comment character when joining commented lines


""""""""""""""""""""""""""""""
" => Visual mode related
""""""""""""""""""""""""""""""
" Visual mode pressing * or # searches for the current selection
" Super useful! From an idea by Michael Naumann
vnoremap <silent> * :<C-u>call VisualSelection('', '')<cr>/<C-r>=@/<cr><cr>
vnoremap <silent> # :<C-u>call VisualSelection('', '')<cr>?<C-r>=@/<cr><cr>


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Moving around, tabs, windows and buffers
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
noremap <space> /
noremap <C-space> ?

" Disable highlight when <leader><cr> is pressed
noremap <silent> <leader><cr> :nohlsearch<cr>

" Smart way to move between windows
noremap <C-j> <C-w>j
noremap <C-k> <C-w>k
noremap <C-h> <C-w>h
noremap <C-l> <C-w>l

" Close the current buffer
noremap <leader>bd :Bclose<cr>:tabclose<cr>gT

" Close all the buffers
noremap <leader>ba :bufdo bd<cr>

noremap <leader>b :buffers<cr>:buffer<space>
noremap <leader>l :bnext<cr>
noremap <leader>h :bprevious<cr>

" Useful mappings for managing tabs
noremap <leader>tn :tabnew<cr>
noremap <leader>to :tabonly<cr>
noremap <leader>tc :tabclose<cr>
noremap <leader>tm :tabmove
noremap <leader>t<leader> :tabnext

" Let 'tl' toggle between this and the last accessed tab
let g:lasttab = 1
nnoremap <leader>tl :exe "tabn ".g:lasttab<cr>
autocmd TabLeave * let g:lasttab = tabpagenr()

" Opens a new tab with the current buffer's path
" Super useful when editing files in the same directory
noremap <leader>te :tabedit <C-r>=expand("%:p:h")<cr>/

" Switch CWD to the directory of the open buffer
noremap <leader>cd :cd %:p:h<cr>:pwd<cr>

" Specify the behavior when switching between buffers
set switchbuf=useopen,usetab,newtab
set showtabline=2

" Return to last edit position when opening files (You want this!)
autocmd BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif


""""""""""""""""""""""""""""""
" => Status line
""""""""""""""""""""""""""""""
" Always show the status line
set laststatus=2

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

" Format the status line
set statusline=\ %{HasPaste()}%f%m%r%h\ %w\ %=
set statusline+=%{&fileencoding?&fileencoding:&encoding}\ %y\ %l,%c%V\ %P
set statusline+=\  " blank space


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Editing mappings
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Move a line of text using ALT+[jk] or Command+[jk] on mac
nnoremap <M-j> mz:m+<cr>`z
nnoremap <M-k> mz:m-2<cr>`z
vnoremap <M-j> :m'>+<cr>`<my`>mzgv`yo`z
vnoremap <M-k> :m'<-2<cr>`>my`<mzgv`yo`z

if has("mac") || has("macunix")
    nnoremap <D-j> <M-j>
    nnoremap <D-k> <M-k>
    vnoremap <D-j> <M-j>
    vnoremap <D-k> <M-k>
endif

" Delete trailing white space on save, useful for some filetypes ;)
function! CleanExtraSpaces()
    let save_cursor = getpos(".")
    let old_query = getreg('/')
    silent! %s/\s\+$//e
    call setpos('.', save_cursor)
    call setreg('/', old_query)
endfunction

autocmd BufWritePre *.txt,*.js,*.py,*.wiki,*.sh,*.coffee :call CleanExtraSpaces()


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Spell checking
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
set spelllang=en_us,cjk

" Pressing ,ss will toggle and untoggle spell checking
noremap <leader>ss :setlocal spell!<cr>

" Shortcuts using <leader>
noremap <leader>sn ]s
noremap <leader>sp [s
noremap <leader>sa zg
noremap <leader>s? z=


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Misc
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Remove the Windows ^M - when the encodings gets messed up
noremap <leader>m mmHmt:%s/<C-v><cr>//ge<cr>'tzt'm

" Quickly open a buffer for scribble
noremap <leader>q :e ~/buffer<cr>

" Quickly open a markdown buffer for scribble
noremap <leader>x :e ~/buffer.md<cr>

" Toggle paste mode on and off
noremap <leader>pp :setlocal paste!<cr>

" Disable F1 to open the help
noremap  <F1> <Esc>
inoremap <F1> <Esc>

" Copy to and paste from the system clipboard
vnoremap <leader>y "+y
noremap  <leader>p "+p

" Use the Silver Searcher
if executable("ag")
    set grepprg=ag\ --nogroup\ --nocolor
    let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
    let g:ctrlp_use_caching = 0
endif


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Plugin settings
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Mappings for vim-fugitive
nnoremap <leader>gs :Gstatus<cr>
nnoremap <leader>gd :Gdiff<cr>
nnoremap <leader>gb :Gblame<cr>

autocmd BufReadPost fugitive://* setlocal bufhidden=delete


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Helper functions
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Don't close window, when deleting a buffer
command! Bclose call <SID>BufcloseCloseIt()
function! <SID>BufcloseCloseIt()
    let l:currentBufNum = bufnr("%")
    let l:alternateBufNum = bufnr("#")

    if buflisted(l:alternateBufNum)
        buffer #
    else
        bnext
    endif

    if bufnr("%") == l:currentBufNum
        new
    endif

    if buflisted(l:currentBufNum)
        execute("bdelete! ".l:currentBufNum)
    endif
endfunction

function! CmdLine(str)
    call feedkeys(":" . a:str)
endfunction

function! VisualSelection(direction, extra_filter) range
    let l:saved_reg = @"
    execute "normal! vgvy"

    let l:pattern = escape(@", "\\/.*'$^~[]")
    let l:pattern = substitute(l:pattern, "\n$", "", "")

    if a:direction == 'gv'
        call CmdLine("Ack '" . l:pattern . "' " )
    elseif a:direction == 'replace'
        call CmdLine("%s" . '/'. l:pattern . '/')
    endif

    let @/ = l:pattern
    let @" = l:saved_reg
endfunction


"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" => Local configurations
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
if filereadable("~/.vimrc.local")
    source ~/.vimrc.local
endif