Vim has a terrific paste mode, in which abbreviations and mappings are ignored. Frustratingly, even keys that do not map to pastable ASCII characters, such as the function keys, are pasted literally. For instance the key F2 is pasted as <F2>. Is there anyway around this?

Note that pastetoggle can in fact be mapped to a function key to easily leave paste mode, however the function that I am writing changes other values when entering or leaving paste mode (such as enabling or disabling line numbers and other things). Therefore I would really like to find a workaround.

For reference, here is the current version of the function (that gets stuck in paste mode):

iab if if<Space>(<Space>{{<Esc>kA<Left><Left><Left><Left><C-R>=Eatchar('\s')<CR>

" Triple-toggle Insert Modes: coding, prose, and paste
let g:insertModeGlobal=1
function! Te()

    if g:insertModeGlobal==3
        " Was in paste insert mode, go to coding insert mode

        set nu
        set nopaste

        let g:insertModeGlobal=4
    endif


    if g:insertModeGlobal==2
        " Was in prose insert mode, go to paste insert mode

        set nolinebreak
        nnoremap j j 
        nnoremap k k 
        nnoremap gj gj
        nnoremap gk gk
        set relativenumber
        execute ":Signs"
        iab if if<Space>(<Space>{{<Esc>kA<Left><Left><Left><Left><C-R>=Eatchar('\s')<CR>

        set nonu
        set paste

        let g:insertModeGlobal=3
    endif

    if g:insertModeGlobal==1
        " Was in coding insert mode, go to prose insert mode

        set linebreak
        nnoremap j gj
        nnoremap k gk
        nnoremap gj j
        nnoremap gk k
        set number
        execute ":DisableSigns"
        iab if if

        let g:insertModeGlobal=2
    endif

    if g:insertModeGlobal==4
        let g:insertModeGlobal=1
    endif

endfunction