Jump2DiffText.vimrc

function! Jump2NextDiffText(dir)
    if a:dir=="prev"
        exec "normal [c"
    elseif a:dir=="next"
        exec "normal ]c"
    endif
    if synIDattr(diff_hlID(".", col(".")), "name")=="DiffChange"
        let line=line(".")
        let cols=col("$")-1
        let idx=1
        while idx<=cols
            if synIDattr(diff_hlID(line, idx), "name")=="DiffText"
                call setpos(".", [0,line,idx])
                echo line.",".idx.",".cols
                break
            else
                let idx = idx+1
            endif
        endwhile
    endif
endfunction

if &diff
    nmap <F7> :call Jump2PrevDiffText("prev")<cr>
    nmap <F8> :call Jump2NextDiffText("next")<cr>
else
    map <F7> :cp<cr>
    map <F8> :cn<cr>
endif