track and flush OSD changes for fewer redraws

1 files changed, 13 insertions, 0 deletions

diff --git a/osd.lua b/osd.lua
index 31cc49c..e638ee8 100644
--- a/osd.lua
+++ b/osd.lua
@@ -54,6 +54,16 @@ function osd.new(init)
 	return t
 end
 
+function mt:dirty()
+	self.is_dirty = true
+end
+
+function mt:flush(state)
+	if self.is_dirty then
+		self:redraw(state)
+	end
+end
+
 function mt:resize(w, h)
 	self.width = w
 	self.height = h
@@ -63,6 +73,7 @@ end
 function mt:set_status(msg, level)
 	self.status_msg = msg
 	self.status_level = level
+	self:dirty()
 end
 
 function mt:status_line()
@@ -466,6 +477,8 @@ function mt:redraw(state)
 	else
 		self:clear_img(true)
 	end
+
+	self.is_dirty = false
 end
 
 function mt:toggle_hidden()