audio: Add widgets for Now Playing information

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

audio/nowplaying.py

@@ -0,0 +1,38 @@
+# Copyright 2021 (c) Anna Schumaker.
+from gi.repository import GLib, Gtk
+
+class NowPlaying(Gtk.ScrolledWindow):
+    def __init__(self):
+        Gtk.ScrolledWindow.__init__(self)
+        self.title = Gtk.Label()
+        self.title.add_css_class("title")
+
+        self.subtitle = Gtk.Label()
+        self.subtitle.add_css_class("subtitle")
+
+        self.box = Gtk.Box.new(Gtk.Orientation.VERTICAL, 0)
+        self.box.append(self.title)
+        self.box.append(self.subtitle)
+
+        self.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.NEVER)
+        self.set_valign(Gtk.Align.CENTER)
+        self.set_hexpand(True)
+        self.set_child(self.box)
+
+        self.set_title(None)
+        self.set_subtitle(None)
+
+    def set_artist(self, text):
+        self.set_subtitle(f"by {text}")
+
+    def set_title(self, text):
+        if text == None:
+            text = "Emmental"
+        text = GLib.markup_escape_text(text)
+        self.title.set_markup(f"<big>{text}</big>")
+
+    def set_subtitle(self, text):
+        if text == None:
+            text = "The Cheesy Music Player"
+        text = GLib.markup_escape_text(text)
+        self.subtitle.set_markup(f"<big>{text}</big>")

audio/test_nowplaying.py

@@ -0,0 +1,44 @@
+# Copyright 2021 (c) Anna Schumaker.
+from . import nowplaying
+from gi.repository import Gtk
+import unittest
+
+class TestNowPlaying(unittest.TestCase):
+    def test_now_playing_init(self):
+        now = nowplaying.NowPlaying()
+
+        self.assertIsInstance(now, Gtk.ScrolledWindow)
+        self.assertIsInstance(now.box, Gtk.Box)
+        self.assertIsInstance(now.title, Gtk.Label)
+        self.assertIsInstance(now.subtitle, Gtk.Label)
+
+        self.assertIn(now.title, now.box)
+        self.assertIn(now.subtitle, now.box)
+
+        viewport = now.get_child()
+        self.assertEqual(viewport.get_child(), now.box)
+
+        self.assertEqual(now.get_valign(), Gtk.Align.CENTER)
+        self.assertEqual(now.get_policy(), (Gtk.PolicyType.AUTOMATIC,
+                                            Gtk.PolicyType.NEVER))
+
+        self.assertTrue(now.get_hexpand())
+        self.assertTrue(now.title.has_css_class("title"))
+        self.assertTrue(now.subtitle.has_css_class("subtitle"))
+
+    def test_now_playing_text(self):
+        now = nowplaying.NowPlaying()
+        self.assertEqual(now.title.get_text(), "Emmental")
+        self.assertEqual(now.subtitle.get_text(), "The Cheesy Music Player")
+
+        now.set_title("Test Title")
+        now.set_artist("Test Artist")
+
+        self.assertEqual(now.title.get_text(), "Test Title")
+        self.assertEqual(now.subtitle.get_text(), "by Test Artist")
+
+        now.set_title(None)
+        now.set_subtitle(None)
+
+        self.assertEqual(now.title.get_text(), "Emmental")
+        self.assertEqual(now.subtitle.get_text(), "The Cheesy Music Player")