don't redraw when cursor position doesn't change

1 files changed, 11 insertions, 0 deletions

diff --git a/state.lua b/state.lua
index 2f609c9..8bf4ddd 100644
--- a/state.lua
+++ b/state.lua
@@ -85,6 +85,12 @@ end
 function menu_mt:set_cursor(pos, lines, opts)
 	local pos = math.max(1, math.min(pos, #self.options))
 	local top = self.view_top
+
+	if not lines then
+		top = pos
+		goto update
+	end
+
 	if opts and opts.centre then
 		top = pos - math.floor((lines - 1) / 2)
 	elseif opts and opts.keep_offset then
@@ -100,8 +106,13 @@ function menu_mt:set_cursor(pos, lines, opts)
 
 	top = math.max(1, math.min(top, #self.options - lines + 1))
 
+	::update::
+	if pos == self.cursor and top == self.view_top then
+		return false
+	end
 	self.cursor = pos
 	self.view_top = top
+	return true
 end
 
 function menu_mt:set_sort(bool, f)