1 files changed, 105 insertions, 0 deletions
diff --git a/contrib/pulse.lua b/contrib/pulse.lua
new file mode 100644
index 0000000..5986265
--- /dev/null
+++ b/contrib/pulse.lua
@@ -0,0 +1,105 @@
+---------------------------------------------------
+-- Licensed under the GNU General Public License v2
+--  * (c) 2010, MrMagne <MrMagne@cerv.fr>
+---------------------------------------------------
+-- Usage example
+--
+-- -- Register widget
+-- vicious.register(vol, vicious.contrib.pulse, " $1%", 2, "alsa_output.pci-0000_00_1b.0.analog-stereo")
+-- -- Register buttons
+-- vol:buttons(awful.util.table.join(
+--   awful.button({ }, 1, function () awful.util.spawn("pavucontrol") end),
+--   awful.button({ }, 4, function () vicious.contrib.pulse.add(5,"alsa_output.pci-0000_00_1b.0.analog-stereo") end),
+--   awful.button({ }, 5, function () vicious.contrib.pulse.add(-5,"alsa_output.pci-0000_00_1b.0.analog-stereo") end)
+-- ))
+---------------------------------------------------
+
+-- {{{ Grab environment
+local type = type
+local tonumber = tonumber
+local io = { popen = io.popen }
+local setmetatable = setmetatable
+local os = { execute = os.execute }
+local table = { insert = table.insert }
+local string = {
+    find = string.find,
+    match = string.match,
+    format = string.format,
+    gmatch = string.gmatch
+}
+-- }}}
+
+
+-- Pulse: provides volume levels of requested pulseaudio sinks
+module("vicious.contrib.pulse")
+
+
+-- {{{ Helper function
+local function get_sink_name(sink)
+    -- If no sink is specified take the first one
+    if sink == nil then
+        local f = io.popen("pacmd list-sinks | grep name:")
+        local line = f:read("*all")
+        f:close()
+
+        sink = string.match(line, "<(.*)>")
+    -- If sink is an index, retrieve its name
+    elseif type(sink) == "number" then
+        local f = io.popen("pacmd list-sinks | grep name:")
+        local line = f:read("*all")
+        f:close()
+
+        local sinks = {}
+        for s in string.gmatch(line, "<(.*)>") do
+            table.insert(sinks, s)
+        end
+
+        sink = sinks[sink]
+    end
+
+    return sink
+end
+-- }}}
+
+-- {{{ Pulseaudio widget type
+local function worker(format, sink)
+    sink = get_sink_name(sink)
+    if sink == nil then return {0} end
+
+    -- Get sink data
+    local f = io.popen("pacmd dump | grep '\\(set-sink-volume " .. sink.."\\)\\|\\(set-sink-mute "..sink.."\\)'")
+    local data = f:read("*all")
+    f:close()
+
+    -- If mute return 0 (not "Mute") so we don't break progressbars
+    if string.match(data," (yes)\n$") then
+        return {0}
+    end
+
+    local vol = tonumber(string.match(data, "(0x[%x]+)"))
+    if vol == nil then vol = 0 end
+
+    return { vol/0x10000*100 }
+end
+-- }}}
+
+-- {{{ Volume control helper
+function add(percent, sink)
+    sink = get_sink_name(sink)
+    if sink == nil then return end
+
+    local f = io.popen("pacmd dump | grep 'set-sink-volume " .. sink.."'")
+    local data = f:read("*all")
+    f:close()
+
+    local initial_vol =  tonumber(string.match(data, "(0x[%x]+)"))
+    local vol = initial_vol + percent/100*0x10000
+    if vol > 0x10000 then vol = 0x10000 end
+    if vol < 0 then vol = 0 end
+
+    local cmd = "pacmd set-sink-volume "..sink..string.format(" 0x%x", vol).." >/dev/null"
+    os.execute(cmd)
+end
+-- }}}
+
+setmetatable(_M, { __call = function(_, ...) return worker(...) end })