Move entire line up and down in Vim

Question

In Notepad++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim?

Answer 1

Put the following to your .vimrc to do the job

noremap  :call feedkeys( line('.')==1 ? '' : 'ddkP' )
noremap  ddp

Disappearing of the line looks like a Vim bug. I put a hack to avoid it. Probably there is some more accurate solution.

Update

There are a lot of unexplained difficulties with just using Vim combinations. These are line missing and extra line jumping.

So here is the scripting solution which can be placed either inside .vimrc or ~/.vim/plugin/swap_lines.vim

function! s:swap_lines(n1, n2)
    let line1 = getline(a:n1)
    let line2 = getline(a:n2)
    call setline(a:n1, line2)
    call setline(a:n2, line1)
endfunction

function! s:swap_up()
    let n = line('.')
    if n == 1
        return
    endif

    call s:swap_lines(n, n - 1)
    exec n - 1
endfunction

function! s:swap_down()
    let n = line('.')
    if n == line('$')
        return
    endif

    call s:swap_lines(n, n + 1)
    exec n + 1
endfunction

noremap   :call swap_up()
noremap   :call swap_down()