[modules/pulsectl] add preliminary version of event-based pulseaudio

add a new module based on pulsectl, with pulsein for microphone and
pulseout for speakers.

should eventually become a drop-in replacement for pasink and pasource.

see #917

bumblebee_status/modules/core/pulsectl.py

@@ -0,0 +1,44 @@
+# pylint: disable=C0111,R0903
+
+import pulsectl
+
+import core.module
+import core.widget
+import core.decorators
+import core.input
+import core.event
+
+class Module(core.module.Module):
+    def __init__(self, config, theme, type):
+        super().__init__(config, theme, core.widget.Widget(self.display))
+        self.background = True
+
+        self.__type = type
+        self.__volume = "n/a"
+        self.__muted = False
+
+        self.process(None)
+
+    def display(self, _):
+        return f"{int(self.__volume*100)}%"
+
+    def process(self, _):
+        with pulsectl.Pulse(self.id + "proc") as pulse:
+            dev = pulse.sink_list()[0] if self.__type == "sink" else pulse.source_list()[0]
+            self.__volume = dev.volume.value_flat
+            self.__muted = dev.mute
+        core.event.trigger("update", [self.id], redraw_only=True)
+        core.event.trigger("draw")
+
+    def update(self):
+        with pulsectl.Pulse(self.id) as pulse:
+            pulse.event_mask_set(self.__type)
+            pulse.event_callback_set(self.process)
+            pulse.event_listen()
+
+    def state(self, _):
+        if self.__muted:
+            return ["warning", "muted"]
+        return ["unmuted"]
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

bumblebee_status/modules/core/pulsein.py

@@ -0,0 +1,9 @@
+from .pulsectl import Module
+
+
+class Module(Module):
+    def __init__(self, config, theme):
+        super().__init__(config, theme, "source")
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

bumblebee_status/modules/core/pulseout.py

@@ -0,0 +1,9 @@
+from .pulsectl import Module
+
+
+class Module(Module):
+    def __init__(self, config, theme):
+        super().__init__(config, theme, "sink")
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

themes/icons/ascii.json

@@ -64,6 +64,14 @@
       "prefix": "audio"
     }
   },
+  "pulseout": {
+    "muted": {
+      "prefix": "audio(mute)"
+    },
+    "unmuted": {
+      "prefix": "audio"
+    }
+  },
   "amixer": {
     "muted": {
       "prefix": "audio(mute)"
@@ -80,6 +88,14 @@
       "prefix": "mic"
     }
   },
+  "pulsein": {
+    "muted": {
+      "prefix": "mic(mute)"
+    },
+    "unmuted": {
+      "prefix": "mic"
+    }
+  },
   "nic": {
     "wireless-up": {
       "prefix": "wifi"

themes/icons/awesome-fonts.json

@@ -197,6 +197,14 @@
       "prefix": ""
     }
   },
+  "pulseout": {
+    "muted": {
+      "prefix": ""
+    },
+    "unmuted": {
+      "prefix": ""
+    }
+  },
   "amixer": {
     "muted": {
       "prefix": ""
@@ -213,6 +221,14 @@
       "prefix": ""
     }
   },
+  "pulsein": {
+    "muted": {
+      "prefix": ""
+    },
+    "unmuted": {
+      "prefix": ""
+    }
+  },
   "kernel": {
     "prefix": "\uf17c"
   },