playlist: Add a Length column to the PlaylistView

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

playlist/column.py

@@ -41,6 +41,13 @@ class TitleFactory(LabelFactory):
     def get_track_text(self, track): return track.title
 
 
+class LengthFactory(LabelFactory):
+    def __init__(self): LabelFactory.__init__(self, xalign=1)
+    def get_track_text(self, track):
+        (m, s) = divmod(int(track.length), 60)
+        return f"{m}:{s:02}"
+
+
 class Column(Gtk.ColumnViewColumn):
     def __init__(self, title, factory, width=-1, **kwargs):
         Gtk.ColumnViewColumn.__init__(self, title=title, **kwargs)
@@ -57,6 +64,7 @@ class Column(Gtk.ColumnViewColumn):
 
 def TracknoColumn(): return Column("#", TracknoFactory())
 def TitleColumn(): return Column("Title", TitleFactory(), width=250, expand=True)
+def LengthColumn(): return Column("Length", LengthFactory())
 
 
 class OldColumn(Gtk.ColumnViewColumn):

playlist/test_column.py

@@ -59,6 +59,12 @@ class TestColumnFactories(unittest.TestCase):
         self.assertIsInstance(factory, column.LabelFactory)
         self.assertEqual(factory.get_track_text(self.track), "Test Track")
 
+    def test_length(self):
+        factory = column.LengthFactory()
+        self.assertIsInstance(factory, column.LabelFactory)
+        self.assertEqual(factory.get_track_text(self.track), "0:01")
+        self.assertEqual(factory.xalign, 1)
+
 
 class TestColumn(unittest.TestCase):
     def test_init(self):
@@ -101,6 +107,12 @@ class TestColumns(unittest.TestCase):
         self.assertEqual(col.get_fixed_width(), 250)
         self.assertTrue(col.get_expand())
 
+    def test_length(self):
+        col = column.LengthColumn()
+        self.assertIsInstance(col, column.Column)
+        self.assertIsInstance(col.get_factory(), column.LengthFactory)
+        self.assertEqual(col.get_title(), "Length")
+
 
 class TestPlaylistColumn(unittest.TestCase):
     def tearDown(self):

playlist/view.py

@@ -14,6 +14,7 @@ class PlaylistView(Gtk.ColumnView):
 
         self.append_column(column.TracknoColumn())
         self.append_column(column.TitleColumn())
+        self.append_column(column.LengthColumn())
 
     def get_filter_model(self): return self.get_model().get_filter_model()
     def get_playlist(self): return self.get_model().get_playlist()