nerdtree plugin to open a visual selection of files

open_multiple.vim

if exists("g:loaded_nerdtree_open_multiple")
    finish
endif
let g:loaded_nerdtree_open_multiple=1

vnoremap <buffer> o :call <SID>OpenMultiple()<cr>

function! s:OpenMultiple() range
    let curLine = a:firstline
    while curLine <= a:lastline
        call cursor(curLine, 1)
        let node = g:NERDTreeFileNode.GetSelected()
        if !empty(node) && !node.path.isDirectory
            if curLine == a:firstline
                "open the first one in the previous window
                call node.open({'where': 'p', 'stay': 1})
            else
                call node.open({'where': 'h', 'stay': 1})
            endif
        endif

        let curLine += 1
    endwhile
endfunction