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380be9dc1c
Now you can hotplug headphones and the volume info shown in volume widgets will automatically be updated.
82 lines
2.9 KiB
Lua
82 lines
2.9 KiB
Lua
-- Provides:
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-- evil::volume
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-- percentage (integer)
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-- muted (boolean)
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-- evil::microphone
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-- muted (boolean)
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local awful = require("awful")
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local volume_old = -1
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local muted_old = -1
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local function emit_volume_info()
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-- Get volume info of the currently active sink
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-- The currently active sink has a star `*` in front of its index
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-- In the output of `pacmd list-sinks`, lines +7 and +11 after "* index:"
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-- contain the volume level and muted state respectively
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-- This is why we are using `awk` to print them.
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awful.spawn.easy_async_with_shell("pacmd list-sinks | awk '/\\* index: /{nr[NR+7];nr[NR+11]}; NR in nr'", function(stdout)
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local volume = stdout:match('(%d+)%% /')
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local muted = stdout:match('muted:(%s+)[yes]')
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local muted_int = muted and 1 or 0
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local volume_int = tonumber(volume)
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-- Only send signal if there was a change
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-- We need this since we use `pactl subscribe` to detect
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-- volume events. These are not only triggered when the
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-- user adjusts the volume through a keybind, but also
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-- through `pavucontrol` or even without user intervention,
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-- when a media file starts playing.
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if volume_int ~= volume_old or muted_int ~= muted_old then
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awesome.emit_signal("evil::volume", volume_int, muted)
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volume_old = volume_int
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muted_old = muted_int
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end
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end)
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end
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local function emit_microphone_info()
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-- Use tail to grab the last line of the output (which refers to the microphone)
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awful.spawn.easy_async_with_shell("pacmd list-sources | grep muted | tail -1 | awk '{print $2}'",
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function(stdout)
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-- Remove trailing whitespace
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muted = stdout:gsub('^%s*(.-)%s*$', '%1')
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awesome.emit_signal("evil::microphone", muted == "yes")
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end
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)
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end
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-- Run once to initialize widgets
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emit_volume_info()
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emit_microphone_info()
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-- Sleeps until pactl detects an event (volume up/down/toggle mute)
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local volume_script = [[
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bash -c "
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pactl subscribe 2> /dev/null | grep --line-buffered \"Event 'change' on sink #\"
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"]]
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-- Sleeps until pactl detects an event (microphone volume up / down / (un)mute)
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local microphone_script = [[
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bash -c '
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pactl subscribe 2> /dev/null | grep --line-buffered "source #"
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']]
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-- Kill old pactl subscribe processes
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awful.spawn.easy_async_with_shell("ps x | grep \"pactl subscribe\" | grep -v grep | awk '{print $1}' | xargs kill", function ()
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-- Run emit_volume_info() with each line printed
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awful.spawn.with_line_callback(volume_script, {
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stdout = function(line)
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emit_volume_info()
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end
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})
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-- Run emit_microphone_info() with each line printed
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awful.spawn.with_line_callback(microphone_script, {
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stdout = function(line)
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emit_microphone_info()
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end
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})
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end)
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