playlist: Make the currently playing track bold

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

playlist/column.py

@@ -1,6 +1,7 @@
 # Copyright 2021 (c) Anna Schumaker.
 from lib import settings
-from gi.repository import Gtk
+from gi.repository import Gtk, GLib
+import audio
 
 class Column(Gtk.ColumnViewColumn):
     def __init__(self, title, field, width=-1, expand=False, align=0):
@@ -28,7 +29,10 @@ class Column(Gtk.ColumnViewColumn):
 
     def on_bind(self, factory, listitem):
         track = listitem.get_item()
-        listitem.get_child().set_text(track[self.field])
+        text = GLib.markup_escape_text(track[self.field])
+        if track == audio.Player.track:
+            text = f"<b>{text}</b>"
+        listitem.get_child().set_markup(text)
         listitem.get_child().set_xalign(self.align)
 
     def on_setup(self, factory, listitem):

playlist/model.py

@@ -3,6 +3,7 @@ from . import controls
 from . import runtime
 from lib import bus
 from gi.repository import GObject, Gio
+import audio
 
 class TagModel(GObject.GObject, Gio.ListModel):
     def __init__(self, tag=None):
@@ -11,6 +12,7 @@ class TagModel(GObject.GObject, Gio.ListModel):
         self.bus = bus.Bus(1)
         self.items = [ ]
         self.__set_tag__(tag)
+        audio.Player.TrackChanged.register(self.on_tracks_changed)
 
     def __set_tag__(self, tag):
         self.tag = tag
@@ -62,3 +64,9 @@ class TagModel(GObject.GObject, Gio.ListModel):
 
     def track_removed(self, tag, track, pos):
         self.bus.board(self.do_track_removed, tag, track, pos)
+
+    def on_tracks_changed(self, prev, new):
+        if prev in self.items:
+            self.items_changed(self.items.index(prev), 1, 1)
+        if new in self.items:
+            self.items_changed(self.items.index(new), 1, 1)