How to disable default mouse wheel behavior in iTerm?

Question

I have:

nnoremap <ScrollWheelUp> k
nnoremap <S-ScrollWheelUp> k
nnoremap <C-ScrollWheelUp> k
nnoremap <ScrollWheelDown> j
nnoremap <S-ScrollWheelDown> j
nnoremap <C-ScrollWheelDown> j
inoremap <ScrollWheelUp> <c-x><c-y>
inoremap <S-ScrollWheelUp> <c-x><c-y>
inoremap <C-ScrollWheelUp> <c-x><c-y>
inoremap <ScrollWheelDown> <c-x><c-e>
inoremap <S-ScrollWheelDown> <c-x><c-e>
inoremap <C-ScrollWheelDown> <c-x><c-e>

this works on iTerm but doesn't overwrite the default scroll behavior (applying my maps but still applies the default behaviors which is scrolling 3 lines up/down). I tried on macvim and that successfully replaced the default behavior.

Answer 1

Found a workaround:

if has('gui_macvim')

    nnoremap <ScrollWheelUp> 2k
    nnoremap <S-ScrollWheelUp> 2k
    nnoremap <C-ScrollWheelUp> 2k
    nnoremap <ScrollWheelDown> 2j
    nnoremap <S-ScrollWheelDown> 2j
    nnoremap <C-ScrollWheelDown> 2j
    inoremap <ScrollWheelUp> <c-x><c-y>
    inoremap <S-ScrollWheelUp> <c-x><c-y>
    inoremap <C-ScrollWheelUp> <c-x><c-y>
    inoremap <ScrollWheelDown> <c-x><c-e>
    inoremap <S-ScrollWheelDown> <c-x><c-e>
    inoremap <C-ScrollWheelDown> <c-x><c-e>

" how to check if vim is running on iTerm?
else

    noremap <up> k
    noremap <down> j
    inoremap <up> <c-x><c-y>
    inoremap <down> <c-x><c-e>

endif

and 2 iTerm settings:

Profiles > Terminal > Report mouse wheel events to false

Advanced > Scroll wheel sends arrow keys when in alternate screen mode to true

Makes iTerm works expectedly