vimrc

" charset
set encoding=utf-8                   "enc, vim buffer charset, NOT the file's charset
set fileencoding=utf-8               "fenc, default save charset
"fencs, default opening charset priority (as auto detection)
set fileencodings=utf-8,utf-16le,big5,gb2312,gb18030,gbk,default

" enable features which are not Vi compatible but really really nice.
set nocompatible  "nocp

" default no bomb for utf-8
set nobomb

" expand TABs to spaces
set expandtab     "et
" set TAB's width
set tabstop=4     "ts
" auto indent width
set shiftwidth=4  "sw

" use the indent of the previous line for a newly created line
set autoindent    "ai

" 256 color mode
set t_Co=256

" show the ruler for the cursor
set ruler  "ru
" show line numbers
set number "nu

" show the search results before stop typing
set incsearch     "is
" highlight search results
set hlsearch      "hls
" case-insensitive search
set ignorecase    "ic
" smart search (override 'ic' when pattern has uppers)
set smartcase     "scs

" enable backspace in insert mode
set backspace=2   "bs

" file formats priority when try to read a file
set fileformats=unix,dos,mac "ffs

" indicates a fast terminal connection
set ttyfast "tf

" don't redrawnscreen  while executing macros, registers and other commands
set lazyredraw "lz

" enable window title
set title

" Increase the max tab pages to be opened
set tabpagemax=30 "tpm

" set windows title back to path instead of default 'Thanks for Flying Vim'
let &titleold=getcwd()

" set statusbar
set statusline+=%f              "filename
set statusline+=%m              "modified flag
set statusline+=%r              "read only flag
set statusline+=\ \%y           "filetype
set statusline+=%=              "left/right separator
set statusline+=%#warningmsg#   "show the errors/warning in the status line
set statusline+=%h              "help file flag
set statusline+=%*              "color off
set statusline+=\ [%{&ff}\]\    "fileformat (unix, dos, mac ...)
set statusline+=%=%{\"[\".(&fenc==\"\"?&enc:&fenc).((exists(\"+bomb\")\ &&\ &bomb)?\",B\":\"\").\"]\ \"} "file charset
set statusline+=[%l,%c]         "cursor line,column
set statusline+=\ \[%L\ lines\] "total lines
set statusline+=\ [%P]          "percent through file
set statusline+=\ %a            "if open multiple files, show current file and and the number of all files

" display a status line at the bottom of the window
set laststatus=2 "ls

" show as much as possible of the last line, instead of '@' symbol
set display+=lastline

" set code folding feature
set foldmethod=indent "fdm
set foldnestmax=5     "fdn max fold level
set foldlevel=5       "fdl default fold level

" set scroll offset(the min number of lines above and below cursor) to 2
set scrolloff=2       "so

" enable mouse in all mode
" set mouse=a

" hichlight current line
set cursorline

" highlight syntax
syntax on

" color scheme
colorscheme kolor

" make whitespaces and TABs visible
"l
set list
"lcs
set listchars=tab:>-,trail:·
highlight SpecialKey guifg=DarkGray

" set temp dirs, can speedup 100x when working on fuse via internet or nfs
"set backupdir=~/.vim/bak/
"set directory=~/.vim/swp/
"set undodir=~/.vim/undo/

" map hot key <Ctrl>+m to switch paste mode
map <C-o> :set paste!<BAR>set paste?<CR>
" map hot key <Ctrl>+n to switch if shows line numbers
map <C-n> :set nu!<BAR>set nu?<CR>
" map hot key <Ctrl>+h to switch if highlights current working column
map <C-g> :set cursorcolumn!<BAR>set cursorcolumn?<CR>
" map hot key <Ctrl>+h to switch if highlights current working line
map <C-h> :set cursorline!<BAR>set cursorline?<CR>

" map tab / shift-tab to add/remove indent in normal & visual modes
nmap <tab>   v>
nmap <s-tab> v<
vmap <tab>   >gv
vmap <s-tab> <gv

" map F9 to save and make
map <F9> :w <CR> :make <CR>
" map F10 to execute filename(without ext.) as external command (usually for c & cpp)
map <F10> :!./%< <CR>
" map F11 = F9 + F10
map <F11> :w <CR> :make <CR> :!./%< <CR>

"=== manually setting filetype ==="
" au, autocommand
autocmd BufRead,BufNewFile *.cpp set filetype=cpp
autocmd BufRead,BufNewFile *.plt set filetype=gnuplot
autocmd BufRead,BufNewFile *.md set filetype=markdown
autocmd BufRead,BufNewFile named.conf* set filetype=named
autocmd BufRead,BufNewFile *.pac set filetype=javascript
autocmd BufRead,BufNewFile .php_cs,.php_cs.dist set filetype=php
autocmd BufRead,BufNewFile Dockerfile* set filetype=dockerfile

"=== setting depends on filetype  ==="
" au, autocommand
autocmd FileType make,gitconfig,gitcommit,apache,dockerfile,go setlocal et!
autocmd FileType gitcommit setlocal cc=50,72 | setlocal textwidth=72 | highlight ColorColumn ctermbg=cyan
autocmd FileType html,css,javascript,yaml,json,typescript setlocal sw=2 ts=2
autocmd FileType fstab setlocal sw=8 ts=8

" set makeprg(depends on filetype) if makefile is not exist
if !filereadable('makefile') && !filereadable('Makefile')
    autocmd FileType c setlocal makeprg=gcc\ %\ -o\ %<
    autocmd FileType cpp setlocal makeprg=g++\ %\ -o\ %<
    autocmd FileType sh setlocal makeprg=bash\ -n\ %
    autocmd FileType php setlocal makeprg=php\ -l\ %
endif

" set Netrw's default style to tree style listing
let g:netrw_liststyle=3

"=== IF YOU WANT TO USE THE FOLLOWING FEATURE, PLEASE UNCOMMENT IT BY YOURSELF ==="

" remember and go to the last used location automatically.
"autocmd BufReadPost * if line("'\"") > 0|if line("'\"") <= line("$")|exe("norm '\"")|else|exe "norm $"|endif|endif

" auto remove trailing whitespace when saving file
"autocmd BufWritePre * :%s/\s\+$//e