mouse: Implement the Lua custom property handler

lib/awful/mouse/init.lua

@@ -29,6 +29,7 @@ local mouse = {
     snap   = require("awful.mouse.snap"),
 }
 
+mouse.object = {}
 mouse.client = {}
 mouse.wibox = {}
 
@@ -276,6 +277,25 @@ capi.client.connect_signal("request::geometry", mouse.resize_handler)
 -- Set the cursor at startup
 capi.root.cursor("left_ptr")
 
+-- Implement the custom property handler
+local props = {}
+
+capi.mouse.set_newindex_miss_handler(function(_,key,value)
+    if mouse.object["set_"..key] then
+        mouse.object["set_"..key](value)
+    else
+        props[key] = value
+    end
+end)
+
+capi.mouse.set_index_miss_handler(function(_,key)
+    if mouse.object["get_"..key] then
+        return mouse.object["get_"..key]()
+    else
+        return props[key]
+    end
+end)
+
 return mouse
 
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