Vim自訂函數

"toggle number display

map <leader>tn :call Toggle_Number()<cr>
function! Toggle_Number()
    if !exists("b:togglenum")
        let b:togglenum=1
    endif
    if b:togglenum==1
        execute "set nonu"
        let b:togglenum=0
    else
        let b:togglenum=1
        execute "set nu"
    endif
endfunction
"auto add tags from project rootau BufReadPost,BufNewFile * call Add_Tags()
function! Add_Tags()
    if expand("%:p:h") !=getcwd()
        echohl WarningMsg | echo "Fail to make! This file is not in the current dir! Press <F7> to redirect to the dir of this file." | echohl None
        return
    endif
    let srcdir=expand("%:p:h")
    let i=0
    while isdirectory(srcdir)
        if i>3
            break
        endif
        if filereadable(srcdir . "/tags")
            let file=srcdir."/tags"
            "echo printf("set tags %s", file)
            if i==0
                execute "set tags=".file
            else
                execute "set tags+=".file
            endif
        endif
        let newdir=fnamemodify(srcdir,":p:h:h")
        "echo printf("newdir %s", newdir)
        if newdir != srcdir
            let srcdir=newdir
        else
            break
        endif
        let i=i+1
    endwhile
endfunction