initial commit

1 files changed, 104 insertions, 0 deletions

diff --git a/widgets/pavolctld.lua b/widgets/pavolctld.lua
new file mode 100644
index 0000000..f59b27f
--- /dev/null
+++ b/widgets/pavolctld.lua
@@ -0,0 +1,104 @@
+local awful = require("awful")
+local wibox = require("wibox")
+local naughty = require("naughty")
+
+-- Gio is used to handle the subprocess instead of awful.spawn.
+-- Gio is more flexible and allows writing to stdin.
+-- also, awful.spawn.with_line_callback does not play nicely with pavolctld, as
+-- it seems to feed the stdout back into its stdin and kill performance.
+local lgi = require("lgi")
+local Gio = lgi.Gio
+
+-- return table
+local widget = {
+	textbox = wibox.widget.textbox()
+}
+
+-- start subprocess
+local p = Gio.Subprocess.new({ "pavolctld" }, Gio.SubprocessFlags.STDIN_PIPE + Gio.SubprocessFlags.STDOUT_PIPE)
+
+local stdout = p:get_stdout_pipe()
+local stdin  = p:get_stdin_pipe()
+
+-- state vars
+local sinks = {
+	default = nil,
+	command = nil, -- sink being modified by commands
+	sinks = {},
+}
+
+function sinks.get(i)
+	if sinks.sinks[i] == nil then
+		sinks.sinks[i] = {
+			vol  = 0,
+			db   = 0.0,
+			mute = 0,
+			name = "",
+			desc = "",
+		}
+	end
+	return sinks.sinks[i]
+end
+
+-- parse output
+function parse_csv(csv)
+	return (csv .. ","):gmatch("(.-),")
+end
+
+awful.spawn.read_lines(stdout, function(s)
+	local cmd = s:sub(1, 1) -- first char of output
+	-- volume change
+	if cmd == 'v' then
+		local v = parse_csv(s:sub(2))
+		local i = tonumber(v())
+		local sink = sinks.get(i)
+		sink.vol  = tonumber(v())
+		sink.db   = tonumber(v())
+		sink.mute = tonumber(v())
+
+		if sink == sinks.default then
+			widget.textbox:set_text(sink.vol)
+		end
+	-- sink description change
+	elseif cmd == 's' then
+		local v = parse_csv(s:sub(2))
+		local i = tonumber(v())
+		local sink = sinks.get(i)
+		sink.name = v()
+		sink.desc = v()
+	-- default sink change
+	elseif cmd == 'f' then
+		local f = tonumber(s:sub(2))
+		sinks.default = sinks.get(f)
+		widget.textbox:set_text(sinks.default.vol)
+		-- set command sink to default sink for now TODO change later
+		pavolctld_cmd("s")
+	-- sink removed
+	elseif cmd == 'x' then
+		local x = tonumber(s:sub(2))
+		table.remove(sinks.sinks, x)
+	else
+		naughty.notify({
+			preset = naughty.config.presets.critical,
+			title = "pavolctld error",
+			text = s
+		})
+	end
+end)
+
+-- pavolctld takes commands in using stdin
+function pavolctld_cmd(cmd)
+	local _, err = stdin:write_all(cmd .. "\n", nil)
+
+	if err then return nil end
+	return true
+end
+
+function widget.volume_inc(vol) return pavolctld_cmd("v+" .. vol) end
+function widget.volume_dec(vol) return pavolctld_cmd("v-" .. vol) end
+function widget.volume_set(vol) return pavolctld_cmd("v"  .. vol) end
+function widget.mute_set(muted) return pavolctld_cmd("m" .. muted and 1 or 0) end
+function widget.mute_toggle()   return pavolctld_cmd("m") end
+function widget.default_sink_set(i) return pavolctld_cmd("f" .. i) end
+
+return widget