window: Add a "user-editing" property

I use the current focus widget to set the "user-editing" property, which
can be used to enable or disable accelerator actions.

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

emmental/window.py

@@ -32,6 +32,7 @@ class Window(Adw.Window):
     now_playing = GObject.Property(type=Gtk.Widget)
     now_playing_size = GObject.Property(type=int, default=250)
     tracklist = GObject.Property(type=Gtk.Widget)
+    user_editing = GObject.Property(type=bool, default=False)
 
     def __init__(self, version: str, **kwargs):
         """Initialize our Window."""
@@ -62,10 +63,16 @@ class Window(Adw.Window):
                            GObject.BindingFlags.BIDIRECTIONAL)
         self.bind_property("tracklist", self._inner_pane, "end-child")
 
+        self.connect("notify::focus-widget", self.__notify_focus_widget)
+
         self._box.append(self._header)
         self._box.append(self._toast)
         self.set_content(self._box)
 
+    def __notify_focus_widget(self, win: Gtk.Window, param) -> None:
+        self.user_editing = isinstance(win.get_property("focus-widget"),
+                                       Gtk.Editable)
+
     def close(self, *args) -> None:
         """Close the window."""
         super().close()

tests/test_window.py

@@ -132,6 +132,17 @@ class TestWindow(unittest.TestCase):
         self.assertEqual(window2._inner_pane.get_end_child(),
                          window2.tracklist)
 
+    def test_user_editing(self):
+        """Test the 'user-editing' property."""
+        self.window.header = Gtk.Entry()
+        self.window.tracklist = Gtk.Button()
+
+        self.assertFalse(self.window.user_editing)
+        self.window.set_focus(self.window.header)
+        self.assertTrue(self.window.user_editing)
+        self.window.set_focus(self.window.tracklist)
+        self.assertFalse(self.window.user_editing)
+
     def test_post_toast(self):
         """Test posting a Toast message to the window."""
         toast = self.window.post_toast("Test Toast")