Make ^F scroll past EOL

See: psliwka#11

autoload/smoothie.vim

@@ -1,3 +1,5 @@
+let s:ctrl_f_invoked = v:false
+
 if !exists('g:smoothie_update_interval')
   ""
   " Time (in milliseconds) between subseqent screen/cursor postion updates.
@@ -59,6 +61,9 @@ function s:step_down()
     endif
     call s:execute_preserving_scroll("normal! 1\<C-D>")
     return 0
+  elseif s:ctrl_f_invoked && winline() > 1
+    call s:execute_preserving_scroll("normal! \<C-E>")
+    return 0
   else
     return 1
   endif
@@ -185,25 +190,29 @@ endfunction
 ""
 " Smooth equivalent to ^D.
 function smoothie#downwards()
+  let s:ctrl_f_invoked = v:false
   call s:count_to_scroll()
   call s:update_target(&scroll)
 endfunction
 
 ""
 " Smooth equivalent to ^U.
 function smoothie#upwards()
+  let s:ctrl_f_invoked = v:false
   call s:count_to_scroll()
   call s:update_target(-&scroll)
 endfunction
 
 ""
 " Smooth equivalent to ^F.
 function smoothie#forwards()
+  let s:ctrl_f_invoked = v:true
   call s:update_target(winheight(0) * v:count1)
 endfunction
 
 ""
 " Smooth equivalent to ^B.
 function smoothie#backwards()
+  let s:ctrl_f_invoked = v:false
   call s:update_target(-winheight(0) * v:count1)
 endfunction