.vimrc

" Comments in Vimscript start with a `"`.

" If you open this file in Vim, it'll be syntax highlighted for you.

" Vim is based on Vi. Setting `nocompatible` switches from the default
" Vi-compatibility mode and enables useful Vim functionality. This
" configuration option turns out not to be necessary for the file named
" '~/.vimrc', because Vim automatically enters nocompatible mode if that file
" is present. But we're including it here just in case this config file is
" loaded some other way (e.g. saved as `foo`, and then Vim started with
" `vim -u foo`).
set sw=4
set ts=4
set cindent
set smarttab
set ai!
set encoding=utf-8

imap <C-_>k <C-k>
set nocompatible

" Turn on syntax highlighting.
syntax on

" Disable the default Vim startup message.
set shortmess+=I

" Show line numbers.
set number

" This enables relative line numbering mode. With both number and
" relativenumber enabled, the current line shows the true line number, while
" all other lines (above and below) are numbered relative to the current line.
" This is useful because you can tell, at a glance, what count is needed to
" jump up or down to a particular line, by {count}k to go up or {count}j to go
" down.
set relativenumber

" Always show the status line at the bottom, even if you only have one window open.
set laststatus=2

" The backspace key has slightly unintuitive behavior by default. For example,
" by default, you can't backspace before the insertion point set with 'i'.
" This configuration makes backspace behave more reasonably, in that you can
" backspace over anything.
set backspace=indent,eol,start

" By default, Vim doesn't let you hide a buffer (i.e. have a buffer that isn't
" shown in any window) that has unsaved changes. This is to prevent you from "
" forgetting about unsaved changes and then quitting e.g. via `:qa!`. We find
" hidden buffers helpful enough to disable this protection. See `:help hidden`
" for more information on this.
set hidden

" This setting makes search case-insensitive when all characters in the string
" being searched are lowercase. However, the search becomes case-sensitive if
" it contains any capital letters. This makes searching more convenient.
set ignorecase
set smartcase

" Enable searching as you type, rather than waiting till you press enter.
set incsearch

" Unbind some useless/annoying default key bindings.
nmap Q <Nop> " 'Q' in normal mode enters Ex mode. You almost never want this.

" Disable audible bell because it's annoying.
set noerrorbells visualbell t_vb=

" Enable mouse support. You should avoid relying on this too much, but it can
" sometimes be convenient.
set mouse+=a

" Try to prevent bad habits like using the arrow keys for movement. This is
" not the only possible bad habit. For example, holding down the h/j/k/l keys
" for movement, rather than using more efficient movement commands, is also a
" bad habit. The former is enforceable through a .vimrc, while we don't know
" how to prevent the latter.
" Do this in normal mode...
nnoremap <Left>  :echoe "Use h"<CR>
nnoremap <Right> :echoe "Use l"<CR>
nnoremap <Up>    :echoe "Use k"<CR>
nnoremap <Down>  :echoe "Use j"<CR>
" ...and in insert mode
inoremap <Left>  <ESC>:echoe "Use h"<CR>
inoremap <Right> <ESC>:echoe "Use l"<CR>
inoremap <Up>    <ESC>:echoe "Use k"<CR>
inoremap <Down>  <ESC>:echoe "Use j"<CR>

" airline-theme
let g:airline_theme='dark'

" insert current date or time
nnoremap <F5> "=strftime("%y/%m/%d %H:%M:%S")<CR>P
inoremap <F5> <C-R>=strftime("%y/%m/%d %H:%M:%S")<CR>

" skeleton files
autocmd BufNewFile *.sh 0r ~/.skeletons/bash.sh

" vim-plug
call plug#begin('~/.vim/plugged')
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
" Plug 'girishji/vimcomplete'
" Plug 'ervandew/supertab'
" Plug 'https://github.com/tpope/vim-fugitive'
" Plug 'shougo/denite.nvim'
" Plug 'tpope/vim-surround'
" Plug 'honza/vim-snippets'
" Plug 'chriskempson/tomorrow-theme'
" Plug 'morhetz/gruvbox'
" Plug 'spacevim/spacevim'
" Plug 'mhinz/vim-startify'
" Plug 'majutsushi/tagbar' " show outline on right, toggle by ':Tagbar'
" Plug 'junegunn/limelight.vim'
" Plug 'iamcco/markdown-preview.nvim', {'do': 'cd app & yarn install'}
" Plug 'iamcco/markdown-preview.nvim', { 'do': { -> mkdp#util#install()  }, 'for': ['markdown', 'vim-plug'] }
call plug#end()

set cursorline
hi CursorLine cterm=none ctermbg=236
hi CursorLineNr cterm=none ctermfg=11

" markdown preview
" map <F3> :MarkdownPreview<CR>
" let g:mkdp_auto_start = 0
" let g:mkdp_auto_close = 1
" let g:mkdp_refresh_slow = 1
" let g:mkdp_open_to_the_world = 0
" let g:mkdp_browser = ''
" let g:mkdp_port = ''
" let g:mkdp_page_title = ' ${name} '

" hide the tilde
let &fillchars..= ',eob: '