更改 awesome pulse 音量显示组件

awesome/pulse.lua

@@ -0,0 +1,103 @@
+local helpers = require("lain.helpers")
+local dkjson  = require("lain.util.dkjson")
+local shell   = require("awful.util").shell
+local wibox   = require("wibox")
+local string  = string
+local type    = type
+
+-- PulseAudio volume
+-- lain.widget.pulse
+
+local function get_device_name(sink)
+   local names = {
+      sink.description,
+      sink.properties["api.alsa.path"],
+      sink.properties["device.description"],
+   }
+
+   local name = names[1]
+   for i = 2, #names do
+      local current_name = names[i]
+
+      if not name then
+         name = names[i]
+      elseif current_name and string.len(name) > string.len(current_name) then
+         name = current_name
+      end
+   end
+
+   return name or "N/A"
+end
+
+local function split_sink_and_json(text)
+   local fn = string.gmatch(text, "[^\r\n]+")
+   local default_sink = fn()
+   local json_text = fn()
+   return default_sink, json_text
+end
+
+local function parse_sink(text)
+   local sink_name, json_text = split_sink_and_json(text)
+
+   local sink
+   for _, s in pairs(dkjson.decode(json_text)) do
+      if sink then
+         break
+      end
+      if s.name == sink_name then
+         sink = s
+      end
+   end
+
+   local names = {}
+
+   local channel_map, vol, props = sink.channel_map, sink.volume, sink.properties
+
+   local channel = {}
+   local ch = 1
+   for ch_name in string.gmatch(channel_map, "([%w-]+)") do
+      local vol_text = vol[ch_name].value_percent
+      channel[ch] = string.match(vol_text, "(%d+)%%") or "N/A"
+      ch = ch + 1
+   end
+
+   local volume = {
+      index = sink.index,
+      device = get_device_name(sink),
+      muted = sink.mute,
+      channel = channel,
+      left = channel[1] or "N/A",
+      right = channel[2] or "N/A",
+   }
+
+   return volume
+end
+
+local function factory(args)
+   args           = args or {}
+
+   local pulse    = { widget = args.widget or wibox.widget.textbox(), device = "N/A" }
+   local timeout  = args.timeout or 5
+   local settings = args.settings or function() end
+
+   pulse.devicetype = args.devicetype or "sink"
+   pulse.cmd = args.cmd or "pactl get-default-" .. pulse.devicetype .. ";pactl -f json list " .. pulse.devicetype .. "s"
+
+   function pulse.update()
+      helpers.async({ shell, "-c", type(pulse.cmd) == "string" and pulse.cmd or pulse.cmd() },
+         function(s)
+            volume_now = parse_sink(s)
+
+            pulse.device = volume_now.index
+
+            widget = pulse.widget
+            settings()
+      end)
+   end
+
+   helpers.newtimer("pulse", timeout, pulse.update)
+
+   return pulse
+end
+
+return factory