Mark conversation as read on movement

src/transcript/transcript-drawing-area.vala

@@ -25,6 +25,8 @@ private class TranscriptDrawingArea : Widget
     private GestureClick _click_gesture = new GestureClick();
     private Gdk.Rectangle? _click_bounding_box = null;
 
+    private EventControllerMotion _motion_controller = new EventControllerMotion();
+
     private const bool debug_viewport = false;
     private uint? _tick_callback_id = null;
     private HashMap<string, ChatItemAnimation> _animations = new HashMap<string, ChatItemAnimation>();
@@ -40,6 +42,22 @@ private class TranscriptDrawingArea : Widget
         });
         add_controller(_click_gesture);
 
+        _motion_controller.motion.connect((x, y) => {
+            if (self == null) {
+                return;
+            }
+
+            // Only print motion events if window is active/focused
+            var window = self.get_native() as Gtk.Window;
+            if (window == null || !window.is_active) {
+                return;
+            }
+
+            self.on_mouse_motion(x, y);
+        });
+        _motion_controller.set_propagation_phase(PropagationPhase.CAPTURE);
+        add_controller(_motion_controller);
+
         SimpleAction copy_action = new SimpleAction("copy", null);
         copy_action.activate.connect(() => {
             if (_click_bounding_box != null) {
@@ -172,6 +190,10 @@ private class TranscriptDrawingArea : Widget
         animation_tick();
     }
 
+    private void on_mouse_motion(double x, double y) {
+        // TODO: Will be making temporary text views here. 
+    }
+
     private void on_right_click() {
         var menu_model = new Menu();
         menu_model.append("Copy", "transcript.copy");