utils: show a notification on changing audio volume

1 files changed, 16 insertions, 3 deletions

diff --git a/utils.lua b/utils.lua
index 5a32c55..4e3bb90 100644
--- a/utils.lua
+++ b/utils.lua
@@ -31,9 +31,22 @@ function M.screen_focus_physical(n)
 end
 
 -- audio control functions
-function M.vol_control(n)
-    local cmd = string.format("amixer -q set Master %d%%", math.abs(n)) .. (n < 0 and "-" or "+")
-    awful.spawn(cmd)
+function M.vol_control(wsp, n)
+    local cmd = string.format("amixer set Master %d%%", math.abs(n)) .. (n < 0 and "-" or "+")
+    awful.spawn.easy_async(cmd,
+        function(stdout, stderr, exitreason, exitcode)
+            if exitcode ~= 0 then
+                naughty.notify({ preset = naughty.config.presets.warn,
+                                 title  = "Error changing the audio volume",
+                                 text   = stderr })
+                return
+            end
+
+            local volume = string.match(stdout, '%[(%d+%%)%]')
+            local muted  = string.match(stdout, '%[off%]') and ' (Muted)' or ''
+            M.notify_singleton(wsp, 'volume',
+                               { title  = "Audio volume", text = volume .. muted})
+        end)
 end
 
 function M.vol_mute_toggle(wsp)