make listbox usable in insert <expr> mode

Author: skywind3000

autoload/quickui/listbox.vim

@@ -87,7 +87,9 @@ endfunc
 " reposition text offset
 "----------------------------------------------------------------------
 function! quickui#listbox#reposition()
-	exec 'normal! zz'
+	if mode() != 'i'
+		exec 'normal! zz'
+	endif
 	let height = winheight(0)
 	let size = line('$')
 	let curline = line('.')
@@ -178,9 +180,11 @@ function! s:vim_create_listbox(textlist, opts)
 	if get(a:opts, 'index', 0) >= 0
 		let moveto = get(a:opts, 'index', 0) + 1
 		call popup_show(winid)
-		call win_execute(winid, 'normal! G')
-		call win_execute(winid, ':' . moveto)
-		call win_execute(winid, 'normal! G')
+		if mode() != 'i'
+			call win_execute(winid, 'normal! G')
+			call win_execute(winid, ':' . moveto)
+			call win_execute(winid, 'normal! G')
+		endif
 		call win_execute(winid, ':' . moveto)
 		call win_execute(winid, 'call quickui#listbox#reposition()')
 	endif
@@ -363,7 +367,9 @@ function! quickui#listbox#cursor_movement(where)
 		let curline = endline
 	endif
 	noautocmd exec ":" . curline
-	noautocmd exec "normal! 0"
+	if mode() != 'i'
+		noautocmd exec "normal! 0"
+	endif
 endfunc