I'm using Vim with the Unite plugin. How to prevent jump to first line in unite preview, when cursor is in last position and key down J is pressed and otherwise jump from first line to last line, when key up K is pressed?
Not too hard, given the Unite docs. Lines for your vimrc:
augroup my_unite
autocmd!
autocmd FileType unite call s:unite_my_settings()
augroup END
function! s:unite_my_settings()
nmap <buffer><expr> j line('.') == line('$') ? '' : '<Plug>(unite_loop_cursor_down)'
nmap <buffer><expr> k line('.') == 1 ? '' : '<Plug>(unite_loop_cursor_up)'
endfunction