From 8869cd570ca13d23aa0db37c830eae1fd820538b Mon Sep 17 00:00:00 2001
From: cuu <dexterkidd@gmail.com>
Date: Sun, 21 Oct 2018 11:57:27 +0800
Subject: [PATCH 1/2] awesome config

---
 awesome/rc.lua | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/awesome/rc.lua b/awesome/rc.lua
index d056081..a817219 100644
--- a/awesome/rc.lua
+++ b/awesome/rc.lua
@@ -81,6 +81,11 @@ awful.layout.layouts = {
 -- }}}
 
 -- {{{ Helper functions
+
+local function tableHasKey(table,key)
+    return table[key] ~= nil 
+end
+
 local function client_menu_toggle_fn()
     local instance = nil
 
@@ -464,14 +469,18 @@ client.connect_signal("unfocus", function(c) c.border_color = beautiful.border_n
 
 client.disconnect_signal("request::activate", awful.ewmh.activate)
 function awful.ewmh.activate(c)
+	  if tableHasKey(c,"class") == false then
+      return
+    end
+
     if c:isvisible() then
 				if c.class:lower() ~= "gsnotify-arm" then
 	      	client.focus = c
 				end
 
-		if c.class:lower() == "retroarch" then
-			c:lower()
-		end
+			if c.class:lower() == "retroarch" then
+				c:lower()
+			end
 
     end
 end

From d175b5a1bad4f2a4dcd5436b9691cc7f2783ff8a Mon Sep 17 00:00:00 2001
From: cuu <dexterkidd@gmail.com>
Date: Sun, 21 Oct 2018 12:07:32 +0800
Subject: [PATCH 2/2] awesome config,missing class in table

---
 awesome/rc.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/awesome/rc.lua b/awesome/rc.lua
index a817219..887c956 100644
--- a/awesome/rc.lua
+++ b/awesome/rc.lua
@@ -377,7 +377,7 @@ client.connect_signal("manage", function (c)
 	c.below=true
 	c.fullscreen=false
 
-	if c.class:lower() == "gsnotify-arm"  then
+	if tableHasKey(c,"class") and c.class:lower() == "gsnotify-arm"  then
 		-- naughty.notify({text = "launched!",timeout = 2,position = "top_center"})
 		c.ontop = true
 		c.above = true
@@ -390,7 +390,7 @@ client.connect_signal("manage", function (c)
 	for s in capi.screen do	
 		if s.geometry.width > 320 then
 			for _,v in pairs(gs_class) do
-				if c.class:lower() == v then
+				if tableHasKey(c,"class") and c.class:lower() == v then
 					awful.titlebar.hide(c)
 					if v ~= "gsnotify-arm" then
 						awful.placement.centered(c)