Tweaked Vim minimap

.vimrc

function! ToggleMinimap()

	if exists("s:isMini") && s:isMini == 0
		let s:isMini = 1
	else
		let s:isMini = 0
	end

	if (s:isMini == 0)

		" save current visible lines
		let s:firstLine = line("w0")
		let s:lastLine = line("w$")

		" don't change window size
		let c = &columns * 12
		let l = &lines * 12
		exe "set columns=" . c
		exe "set lines=" . l

		" make font small
		set guifont=ProggyTinyTT:h1
		
		exe 'normal zR'

		" highlight lines which were visible
		let s:lines = ""
		for i in range(s:firstLine, s:lastLine)
			let s:lines = s:lines . "\\%" . i . "l"
			if i < s:lastLine
				let s:lines = s:lines . "\\|"
			endif
		endfor

		exe 'match Visible /' . s:lines . '/'
		hi Visible guifg=#ffffff guibg=#2b3c43
		set cursorline
		set noantialias

		no j 10j
		no k 10k

		nmap <LeftRelease> :ToggleMinimap<CR> 
		nmap <space> :ToggleMinimap<CR>

	else

		set guifont=Anonymous\ Pro:h14
		hi clear Visible
		set nocursorline
		set antialias

		unmap j
		unmap k
		unmap <LeftRelease>
		unmap <space>

		exe ":normal 0"

	endif

endfunction

command! ToggleMinimap call ToggleMinimap()

nmap <d-space> :ToggleMinimap<CR>