From 237470c8f45190b213e3a173ce6ae1a74b3e11fe Mon Sep 17 00:00:00 2001
From: "Adrian C. (anrxc)" <anrxc@sysphere.org>
Date: Sun, 14 Mar 2010 01:55:33 +0100
Subject: API: transform widgets namespace table to a directory

---
 widgets/volume.lua | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 widgets/volume.lua

(limited to 'widgets/volume.lua')

diff --git a/widgets/volume.lua b/widgets/volume.lua
new file mode 100644
index 0000000..42f72e4
--- /dev/null
+++ b/widgets/volume.lua
@@ -0,0 +1,50 @@
+---------------------------------------------------
+-- Licensed under the GNU General Public License v2
+--  * (c) 2010, Adrian C. <anrxc@sysphere.org>
+---------------------------------------------------
+
+-- {{{ Grab environment
+local tonumber = tonumber
+local io = { popen = io.popen }
+local setmetatable = setmetatable
+local string = { match = string.match }
+-- }}}
+
+
+-- Volume: provides volume levels and state of requested ALSA mixers
+module("vicious.widgets.volume")
+
+
+-- {{{ Volume widget type
+local function worker(format, warg)
+    local mixer_state = {
+        ["on"]  = "♫", -- "",
+        ["off"] = "♩"  -- "M"
+    }
+
+    -- Get mixer control contents
+    local f = io.popen("amixer get " .. warg)
+    local mixer = f:read("*all")
+    f:close()
+
+    -- Capture mixer control state:          [5%] ... ... [on]
+    local volu, mute = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
+    -- Handle mixers without data
+    if volu == nil then
+       return {0, mixer_state["off"]}
+    end
+
+    -- Handle mixers without mute
+    if mute == "" and volu == "0"
+    -- Handle mixers that are muted
+    or mute == "off" then
+       mute = mixer_state["off"]
+    else
+       mute = mixer_state["on"]
+    end
+
+    return {tonumber(volu), mute}
+end
+-- }}}
+
+setmetatable(_M, { __call = function(_, ...) return worker(...) end })
-- 
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