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+"{ Custom key mappings
+" Save key strokes (now we do not need to press shift to enter command mode).
+" Vim-sneak has also mapped `;`, so using the below mapping will break the map
+" used by vim-sneak
+nnoremap ; :
+xnoremap ; :
+
+" Quicker way to open command window
+nnoremap q; q:
+
+" Quicker <Esc> in insert mode
+inoremap <silent> jk <Esc>
+
+" Turn the word under cursor to upper case
+inoremap <silent> <c-u> <Esc>viwUea
+
+" Turn the current word into title case
+inoremap <silent> <c-t> <Esc>b~lea
+
+" Paste non-linewise text above or below current cursor,
+" see https://stackoverflow.com/a/1346777/6064933
+nnoremap <leader>p m`o<ESC>p``
+nnoremap <leader>P m`O<ESC>p``
+
+" Shortcut for faster save and quit
+nnoremap <silent> <leader>w :update<CR>
+" Saves the file if modified and quit
+nnoremap <silent> <leader>q :x<CR>
+" Quit all opened buffers
+nnoremap <silent> <leader>Q :qa<CR>
+
+" Navigation in the location and quickfix list
+nnoremap [l :lprevious<CR>zv
+nnoremap ]l :lnext<CR>zv
+nnoremap [L :lfirst<CR>zv
+nnoremap ]L :llast<CR>zv
+nnoremap [q :cprevious<CR>zv
+nnoremap ]q :cnext<CR>zv
+nnoremap [Q :cfirst<CR>zv
+nnoremap ]Q :clast<CR>zv
+
+" Close location list or quickfix list if they are present,
+" see https://goo.gl/uXncnS
+nnoremap<silent> \x :windo lclose <bar> cclose<CR>
+
+" Close a buffer and switching to another buffer, do not close the
+" window, see https://goo.gl/Wd8yZJ
+nnoremap <silent> \d :bprevious <bar> bdelete #<CR>
+
+" Toggle search highlight, see https://goo.gl/3H85hh
+nnoremap <silent><expr> <Leader>hl (&hls && v:hlsearch ? ':nohls' : ':set hls')."\n"
+
+" Disable arrow key in vim, see https://goo.gl/s1yfh4.
+nnoremap <Up> <nop>
+nnoremap <Down> <nop>
+nnoremap <Left> <nop>
+nnoremap <Right> <nop>
+inoremap <Up> <nop>
+inoremap <Down> <nop>
+inoremap <Left> <nop>
+inoremap <Right> <nop>
+
+" Insert a blank line below or above current line (do not move the cursor),
+" see https://stackoverflow.com/a/16136133/6064933
+nnoremap <expr> oo 'm`' . v:count1 . 'o<Esc>``'
+nnoremap <expr> OO 'm`' . v:count1 . 'O<Esc>``'
+
+" nnoremap oo @='m`o<c-v><Esc>``'<cr>
+" nnoremap OO @='m`O<c-v><Esc>``'<cr>
+
+" the following two mappings work, but if you change double quote to single, it
+" will not work
+" nnoremap oo @="m`o\<lt>Esc>``"<cr>
+" nnoremap oo @="m`o\e``"<cr>
+
+" Insert a space after current character
+nnoremap <silent> <Space><Space> a<Space><ESC>h
+
+" Yank from current cursor position to the end of the line (make it
+" consistent with the behavior of D, C)
+nnoremap Y y$
+
+" Move the cursor based on physical lines, not the actual lines.
+nnoremap <silent> <expr> j (v:count == 0 ? 'gj' : 'j')
+nnoremap <silent> <expr> k (v:count == 0 ? 'gk' : 'k')
+nnoremap <silent> ^ g^
+nnoremap <silent> 0 g0
+
+" Do not include white space characters when using $ in visual mode,
+" see https://goo.gl/PkuZox
+xnoremap $ g_
+
+" Jump to matching pairs easily in normal mode
+nnoremap <Tab> %
+
+" Go to start or end of line easier
+nnoremap H ^
+xnoremap H ^
+nnoremap L g_
+xnoremap L g_
+
+" Resize windows using <Alt> and h,j,k,l, inspiration from
+" https://goo.gl/vVQebo (bottom page).
+" If you enable mouse support, shorcuts below may not be necessary.
+nnoremap <silent> <M-h> <C-w><
+nnoremap <silent> <M-l> <C-w>>
+nnoremap <silent> <M-j> <C-W>-
+nnoremap <silent> <M-k> <C-W>+
+
+" Fast window switching, inspiration from
+" https://stackoverflow.com/a/4373470/6064933
+nnoremap <silent> <M-left> <C-w>h
+nnoremap <silent> <M-right> <C-w>l
+nnoremap <silent> <M-down> <C-w>j
+nnoremap <silent> <M-up> <C-w>k
+
+" Continuous visual shifting (does not exit Visual mode), `gv` means
+" to reselect previous visual area, see https://goo.gl/m1UeiT
+xnoremap < <gv
+xnoremap > >gv
+
+" When completion menu is shown, use <cr> to select an item
+" and do not add an annoying newline. Otherwise, <enter> is what it is.
+" For more info , see https://goo.gl/KTHtrr and https://goo.gl/MH7w3b
+inoremap <expr> <cr> ((pumvisible())?("\<C-Y>"):("\<cr>"))
+" Use <esc> to close auto-completion menu
+inoremap <expr> <esc> ((pumvisible())?("\<C-e>"):("\<esc>"))
+
+" Edit and reload init.vim quickly
+nnoremap <silent> <leader>ev :edit $MYVIMRC<cr>
+nnoremap <silent> <leader>sv :silent update $MYVIMRC <bar> source $MYVIMRC <bar>
+    \ echomsg "Nvim config successfully reloaded!"<cr>
+
+" Reselect the text that has just been pasted
+nnoremap <leader>v `[V`]
+
+" Use sane regex expression (see `:h magic` for more info)
+nnoremap / /\v
+
+" Find and replace (like Sublime Text 3)
+nnoremap <C-H> :%s/
+xnoremap <C-H> :s/
+
+" Change current working directory locally and print cwd after that,
+" see https://vim.fandom.com/wiki/Set_working_directory_to_the_current_file
+nnoremap <silent> <leader>cd :lcd %:p:h<CR>:pwd<CR>
+
+" Use Esc to quit builtin terminal
+tnoremap <ESC>   <C-\><C-n>
+
+" Toggle spell checking (autosave does not play well with z=, so we disable it
+" when we are doing spell checking)
+nnoremap <silent> <F11> :set spell! <bar> :AutoSaveToggle<cr>
+inoremap <silent> <F11> <C-O>:set spell! <bar> :AutoSaveToggle<cr>
+
+" Decrease indent level in insert mode with shift+tab
+inoremap <S-Tab> <ESC><<i
+
+" Change text without putting the text into register,
+" see http://tinyurl.com/y2ap4h69
+nnoremap c "_c
+nnoremap C "_C
+nnoremap cc "_cc
+
+" Remove trailing whitespace characters
+nnoremap <silent> <leader><Space> :call utils#StripTrailingWhitespaces()<CR>
+
+" check the syntax group of current cursor position
+nnoremap <silent> <leader>st :call utils#SynGroup()<CR>
+"}