header: Add a BackgroundRow to the popover menu

And wire up the properties so we can save the user's current setting.

Implements: #50 ("Background Music Mode")
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

emmental/__init__.py

@@ -129,6 +129,8 @@ class Application(Adw.Application):
         hdr = header.Header(sql=self.db, title=VERSION_STRING)
         hdr.bind_property("volume", self.player, "volume")
         for (setting, property) in [("audio.volume", "volume"),
+                                    ("audio.background.enabled", "bg-enabled"),
+                                    ("audio.background.volume", "bg-volume"),
                                     ("audio.replaygain.enabled", "rg-enabled"),
                                     ("audio.replaygain.mode", "rg-mode")]:
             self.db.settings.bind_setting(setting, hdr, property)

emmental/header/__init__.py

@@ -33,6 +33,8 @@ class Header(Gtk.HeaderBar):
     sql = GObject.Property(type=db.Connection)
     title = GObject.Property(type=str)
     subtitle = GObject.Property(type=str)
+    bg_enabled = GObject.Property(type=bool, default=False)
+    bg_volume = GObject.Property(type=float, default=0.5)
     rg_enabled = GObject.Property(type=bool, default=False)
     rg_mode = GObject.Property(type=str, default="auto")
     volume = GObject.Property(type=float, default=1.0)
@@ -44,11 +46,13 @@ class Header(Gtk.HeaderBar):
         self._title = Adw.WindowTitle(title=self.title, subtitle=self.subtitle,
                                       tooltip_text=gsetup.env_string())
         self._volume = volume.VolumeRow()
+        self._background = volume.BackgroundRow()
         self._replaygain = replaygain.ReplayGainRow()
 
         self._box = Gtk.ListBox(selection_mode=Gtk.SelectionMode.NONE)
         self._box.add_css_class("boxed-list")
         self._box.append(self._volume)
+        self._box.append(self._background)
         self._box.append(self._replaygain)
 
         icon = _volume_icon(self.volume)
@@ -57,6 +61,10 @@ class Header(Gtk.HeaderBar):
 
         self.bind_property("title", self._title, "title")
         self.bind_property("subtitle", self._title, "subtitle")
+        self.bind_property("bg-enabled", self._background, "enabled",
+                           GObject.BindingFlags.BIDIRECTIONAL)
+        self.bind_property("bg-volume", self._background, "volume",
+                           GObject.BindingFlags.BIDIRECTIONAL)
         self.bind_property("rg-enabled", self._replaygain, "enabled",
                            GObject.BindingFlags.BIDIRECTIONAL)
         self.bind_property("rg-mode", self._replaygain, "mode",

tests/header/test_header.py

@@ -85,6 +85,23 @@ class TestHeader(tests.util.TestCase):
                 self.assertEqual(self.header._button.get_tooltip_text(),
                                  f"volume: {i*10}%\nnormalizing: off")
 
+    def test_background_listening(self):
+        """Test the background listening mode."""
+        self.assertIsInstance(self.header._background,
+                              emmental.header.volume.BackgroundRow)
+
+        self.assertFalse(self.header.bg_enabled)
+        self.header.bg_enabled = True
+        self.assertTrue(self.header._background.enabled)
+        self.header._background.enabled = False
+        self.assertFalse(self.header.bg_enabled)
+
+        self.assertEqual(self.header.bg_volume, 0.5)
+        self.header.bg_volume = 0.75
+        self.assertEqual(self.header._background.volume, 0.75)
+        self.header._background.volume = 0.25
+        self.assertEqual(self.header.bg_volume, 0.25)
+
     def test_replaygain(self):
         """Test that we can configure ReplayGain as expected."""
         self.assertIsInstance(self.header._replaygain,
@@ -124,4 +141,6 @@ class TestHeader(tests.util.TestCase):
         self.assertEqual(self.header._box.get_row_at_index(0),
                          self.header._volume)
         self.assertEqual(self.header._box.get_row_at_index(1),
+                         self.header._background)
+        self.assertEqual(self.header._box.get_row_at_index(2),
                          self.header._replaygain)

tests/test_settings.py

@@ -51,6 +51,18 @@ class TestSettings(unittest.TestCase):
         self.assertEqual(self.app.build_header().volume, 0.5)
         self.assertEqual(self.player.volume, 0.5)
 
+    def test_save_background_mode(self, mock_stdout: io.StringIO):
+        """Check saving and loading background mode from the database."""
+        self.assertFalse(self.settings["audio.background.enabled"])
+        self.assertEqual(self.settings["audio.background.volume"], 0.5)
+
+        self.win.header.bg_enabled = True
+        self.win.header.bg_volume = 0.75
+
+        win = self.app.build_window()
+        self.assertTrue(win.header.bg_enabled)
+        self.assertEqual(win.header.bg_volume, 0.75)
+
     def test_save_replaygain(self, mock_stdout: io.StringIO):
         """Check saving and loading replaygain state from the database."""
         self.assertFalse(self.settings["audio.replaygain.enabled"])