Only enable the quick-scope plugin's highlighting when using the f/F/t/T movements

context_quick_scope.vim

" Insert into your .vimrc after quick-scope is loaded.
" Obviously depends on <https://github.com/unblevable/quick-scope> being installed.

function! Quick_scope_selective(movement)
    let needs_disabling = 0
    if !g:qs_enable
        QuickScopeToggle
        redraw
        let needs_disabling = 1
    endif

    let letter = nr2char(getchar())

    if needs_disabling
        QuickScopeToggle
    endif

    return a:movement . letter
endfunction

let g:qs_enable = 0

nnoremap <expr> <silent> f Quick_scope_selective('f')
nnoremap <expr> <silent> F Quick_scope_selective('F')
nnoremap <expr> <silent> t Quick_scope_selective('t')
nnoremap <expr> <silent> T Quick_scope_selective('T')
vnoremap <expr> <silent> f Quick_scope_selective('f')
vnoremap <expr> <silent> F Quick_scope_selective('F')
vnoremap <expr> <silent> t Quick_scope_selective('t')
vnoremap <expr> <silent> T Quick_scope_selective('T')