some cpu usage improvements

[etc/awesome.git] / widgets / base.lua

diff --git a/widgets/base.lua b/widgets/base.lua
index 0431d03a8891f15696ff674aa47e501cf7a86b2a..272163c067f22d1e517a8ba27507a3cafb785b3a 100644 (file)
--- a/widgets/base.lua
+++ b/widgets/base.lua
@@ -7,16 +7,17 @@
 --]]
 
 local newtimer     = require("lain.helpers").newtimer
+local read_pipe    = require("lain.helpers").read_pipe
+
 local wibox        = require("wibox")
 
-local io           = io
 local setmetatable = setmetatable
 
--- Basic template for simple widgets 
+-- Basic template for custom widgets
 -- lain.widgets.base
-local base = {}
 
 local function worker(args)
+    local base     = {}
     local args     = args or {}
     local timeout  = args.timeout or 5
     local cmd      = args.cmd or ""
@@ -24,14 +25,18 @@ local function worker(args)
 
     base.widget = wibox.widget.textbox('')
 
-    function update()
-        output = io.popen(cmd):read("*all")
-        widget = base.widget
-        settings()
+    function base.update()
+        if output ~= abase.prev then
+            output = read_pipe(cmd)
+            widget = base.widget
+            settings()
+            abase.prev = output
+        end
     end
 
-    newtimer(cmd, timeout, update)
-    return base.widget
+    newtimer(cmd, timeout, base.update)
+
+    return setmetatable(base, { __index = base.widget })
 end
 
-return setmetatable(base, { __call = function(_, ...) return worker(...) end })
+return setmetatable({}, { __call = function(_, ...) return worker(...) end })