window: Check if a tab was hit on right click

Since we have to handle the event in reverse order (because GtkTreeView
claims the event sequence in the capture phase, meaning that the events
won’t bubble up), the context menu for notebook tabs will open
everywhere, because the event handler is not stopped by those lower in
the hierarchy. A simple check if the cursor is on a tab will prevent
that.

src/nautilus-notebook.c

@@ -222,6 +222,14 @@ nautilus_notebook_contains_slot (NautilusNotebook   *notebook,
     return found;
 }
 
+gboolean
+nautilus_notebook_content_area_hit (NautilusNotebook *notebook,
+                                    gint              x,
+                                    gint              y)
+{
+    return find_tab_num_at_pos (notebook, x, y) == -1;
+}
+
 void
 nautilus_notebook_sync_loading (NautilusNotebook   *notebook,
                                 NautilusWindowSlot *slot)

src/nautilus-notebook.h

@@ -54,4 +54,8 @@ void            nautilus_notebook_next_page (NautilusNotebook *notebook);
 gboolean        nautilus_notebook_contains_slot (NautilusNotebook   *notebook,
                                                  NautilusWindowSlot *slot);
 
-G_END_DECLS
+gboolean        nautilus_notebook_content_area_hit (NautilusNotebook *notebook,
+                                                    gint              x,
+                                                    gint              y);
+
+G_END_DECLS

src/nautilus-window.c

@@ -2027,10 +2027,18 @@ notebook_button_press_cb (GtkGestureMultiPress *gesture,
                           gpointer              user_data)
 {
     NautilusWindow *window;
+    NautilusWindowPrivate *priv;
     GdkEventSequence *sequence;
     const GdkEvent *event;
 
     window = NAUTILUS_WINDOW (user_data);
+    priv = nautilus_window_get_instance_private (window);
+
+    if (nautilus_notebook_content_area_hit (NAUTILUS_NOTEBOOK (priv->notebook), x, y))
+    {
+        return;
+    }
+
     sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
     event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);