playlist: Make the current track bold

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

playlist/column.py

@@ -1,9 +1,25 @@
 # Copyright 2021 (c) Anna Schumaker.
 import audio
 import lib
-from gi.repository import Gtk, GLib
+from gi.repository import Gtk, GLib, Pango
 from lib import settings
 
+BoldAttr = Pango.AttrList.new()
+BoldAttr.insert(Pango.attr_weight_new(Pango.Weight.BOLD))
+
+class TrackLabel(Gtk.Label):
+    def set_item(self, item, text):
+        audio.Player.connect("track-changed", self.track_changed, item)
+        self.track_changed(audio.Player, None, audio.Player.track, item)
+        self.set_text(text)
+
+    def unset_item(self, item):
+        self.set_text("")
+        audio.Player.disconnect_by_func(self.track_changed)
+
+    def track_changed(self, player, old, new, this):
+        self.set_attributes(BoldAttr if this == new else None)
+
 
 class LabelFactory(Gtk.SignalListItemFactory):
     def __init__(self, xalign):
@@ -18,14 +34,15 @@ class LabelFactory(Gtk.SignalListItemFactory):
         raise NotImplementedError
 
     def on_setup(self, factory, listitem):
-        listitem.set_child(Gtk.Label(xalign=self.xalign))
+        listitem.set_child(TrackLabel(xalign=self.xalign))
 
     def on_bind(self, factory, listitem):
-        text = self.get_track_text(listitem.get_item())
-        listitem.get_child().set_text(text)
+        item = listitem.get_item()
+        text = self.get_track_text(item)
+        listitem.get_child().set_item(item, text)
 
     def on_unbind(self, factory, listitem):
-        listitem.get_child().set_text("")
+        listitem.get_child().unset_item(listitem.get_item())
 
     def on_teardown(self, factory, listitem):
         listitem.set_child(None)

playlist/test_column.py

@@ -1,4 +1,5 @@
 # Copyright 2021 (c) Anna Schumaker.
+import audio
 import db
 import lib
 import unittest
@@ -13,23 +14,45 @@ class FakeListItem:
 
 
 class TestLabelFactory(unittest.TestCase):
+    def setUp(self): db.reset()
+
     def test_init(self):
         factory = column.LabelFactory(0.5)
         self.assertIsInstance(factory, Gtk.SignalListItemFactory)
         self.assertEqual(factory.xalign, 0.5)
 
+    def test_label(self):
+        audio.Player.track = None
+        track = db.make_fake_track(1, 1, "Test Track", "/a/b/c/1.ogg")
+        label = column.TrackLabel()
+
+        self.assertIsInstance(label, Gtk.Label)
+        self.assertIsNone(label.get_attributes())
+
+        label.set_attributes(column.BoldAttr)
+        label.set_item(track, "Test Track")
+        self.assertEqual(label.get_text(), "Test Track")
+        self.assertIsNone(label.get_attributes())
+
+        audio.Player.change_track(track)
+        self.assertIsNotNone(label.get_attributes())
+
+        label.unset_item(track)
+        self.assertEqual(label.get_text(), "")
+
     def test_setup_teardown(self):
         fake = FakeListItem()
         factory = column.LabelFactory(0.5)
 
         factory.on_setup(factory, fake)
-        self.assertIsInstance(fake.child, Gtk.Label)
+        self.assertIsInstance(fake.child, column.TrackLabel)
         self.assertEqual(fake.child.get_xalign(), 0.5)
 
         factory.on_teardown(factory, fake)
         self.assertIsNone(fake.child)
 
     def test_bind_unbind(self):
+        track = db.make_fake_track(1, 1, "Test Track", "/a/b/c/1.ogg")
         fake = FakeListItem()
         factory = column.LabelFactory(0.5)
         factory.on_setup(factory, fake)
@@ -37,7 +60,7 @@ class TestLabelFactory(unittest.TestCase):
         with self.assertRaises(NotImplementedError):
             factory.on_bind(factory, fake)
 
-        fake.child.set_text("abcde")
+        fake.child.set_item(track, "abcde")
         factory.on_unbind(factory, fake)
         self.assertEqual(fake.child.get_text(), "")