set expandtab           " 设置tab键替换为tabstop规定的空格数
set tabstop=4           " 编辑时tab键占用的空格数
set shiftwidth=4        " 设置tab的间隔（格式化时）
set softtabstop=4       " 设置退格键退格的空格数，让vim把连续的空格当作一个tab
" autocmd FileType *asm,vim,*sh,makefile set tabstop=4 softtabstop=4 shiftwidth=4 noexpandtab

set showmatch           " 在输入括号时光标会短暂地跳到与之相匹配的括号处
set nowrap              " 设置自动折行

set textwidth=500       " 设置自动换行的长度
set lbr                 " 设置自动换行
set foldmethod=syntax   " 设置按语法折叠代码
set nofoldenable        " 在打开文件时不要折叠

" 自动补全配置
autocmd FileType python set omnifunc=pythoncomplete#Complete
autocmd FileType javascript set omnifunc=javascriptcomplete#CompleteJS
autocmd FileType html set omnifunc=htmlcomplete#CompleteTags
autocmd FileType css set omnifunc=csscomplete#CompleteCSS
autocmd FileType xml set omnifunc=xmlcomplete#CompleteTags
autocmd FileType php set omnifunc=phpcomplete#CompletePHP
autocmd FileType c set omnifunc=ccomplete#Complete

" 修改gg=G的作用
nnoremap gg=G :call PreserveCursorAndFormat()<CR>
function! PreserveCursorAndFormat()
    let l:save_pos = getpos(".")
    let l:save_view = winsaveview()
    normal! gg=G
    call setpos('.', l:save_pos)
    call winrestview(l:save_view)
endfunction

command! -nargs=0 ClangFormat :call ClangFormat()
autocmd FileType c,h,cpp,hpp,cc nnoremap <buffer> gg=G :ClangFormat<CR>
" 定义ClangFormat命令：
" 当前文件的各级父目录下如果存在.clang-format，则使用
" 否则使用默认规则，缩进为4
function! ClangFormat()
    let clang_format = "clang-format"
    if !executable(clang_format)
        normal gg=G
        return
    endif
    let clang_format_file = findfile(".clang-format", expand('%:p:h') . ";")
    if clang_format_file != ""
        let clang_format = clang_format . " -style=file:" . clang_format_file
    else
        let clang_format = clang_format . " -style='{IndentWidth: 4}'"
    endif
    let save_cursor = getpos(".")
    let save_view = winsaveview()
    let save_cursor = getpos(".")
    let save_view = winsaveview()
    execute ":silent %! ".clang_format
    call setpos('.', save_cursor)
    call winrestview(save_view)
endfunction

" 新建.c/.cpp/.sh/.py文件，自动插入文件头
autocmd BufNewFile *.cpp,*.[ch],*.sh exec ":call SetTitle()"
func SetTitle()
    if &filetype == 'sh'
        call setline(1,"#!/bin/bash")
        call append(line("."),   "" )
        call append(line(".")+1, "\##########################################################################" )
        call append(line(".")+2, "\# File Name    : ".expand("%"))
        call append(line(".")+3, "\# Encoding     : utf-8")
        call append(line(".")+4, "\# Author       : We-unite")
        call append(line(".")+5, "\# Email        : weunite1848@gmail.com")
        call append(line(".")+6, "\# Created Time : ".strftime("%Y-%m-%d %H:%M:%S",localtime()))
        call append(line(".")+7, "\##########################################################################" )
        call append(line(".")+8, "")
    elseif &filetype =='py'
        call setline(1,"#!/usr/bin/env python")
        call append(line("."),   "" )
        call append(line(".")+1, "\##########################################################################" )
        call append(line(".")+2, "\# File Name    : ".expand("%"))
        call append(line(".")+3, "\# Encoding     : utf-8")
        call append(line(".")+4, "\# Author       : We-unite")
        call append(line(".")+5, "\# Email        : weunite1848@gmail.com")
        call append(line(".")+6, "\# Created Time : ".strftime("%Y-%m-%d %H:%M:%S",localtime()))
        call append(line(".")+7, "\##########################################################################" )
        call append(line(".")+8, "")
    else
        call setline(1, "/*************************************************************************")
        call append(line("."),   "  > File Name    : ".expand("%"))
        call append(line(".")+1, "  > Encoding     : utf-8")
        call append(line(".")+2, "  > Author       : We-unite")
        call append(line(".")+3, "  > Email        : weunite1848@gmail.com ")
        call append(line(".")+4, "  > Created Time : ".strftime("%Y-%m-%d %H:%M:%S",localtime()))
        call append(line(".")+5, " ************************************************************************/")
        call append(line(".")+6, "")
        if &filetype == 'cpp'
            call append(line(".")+7, "#include <iostream>")
            call append(line(".")+8, "using namespace std;")
            call append(line(".")+9, "")
        elseif &filetype == 'c'
            call append(line(".")+7, "#include <stdio.h>")
            call append(line(".")+9, "")
        endif
    endif
    normal G
endfunc