[gnome-builder/wip/gtk4-port] libide/gui: notify addins of last page closed

[Christian Hergert <chergert src gnome org>]

commit cbe2e51fd101b3c02efbf17df77b722fa8ba886f
Author: Christian Hergert <chergert redhat com>
Date:   Sat Apr 9 09:57:44 2022 -0700

    libide/gui: notify addins of last page closed

 src/libide/gui/ide-workspace.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/gui/ide-workspace.c b/src/libide/gui/ide-workspace.c
index 6dce17394..41e690d0d 100644
--- a/src/libide/gui/ide-workspace.c
+++ b/src/libide/gui/ide-workspace.c
@@ -755,15 +755,30 @@ _ide_workspace_remove_page_mru (IdeWorkspace *self,
                                 GList        *mru_link)
 {
   IdeWorkspacePrivate *priv = ide_workspace_get_instance_private (self);
+  IdePage *mru_page;
+
+  IDE_ENTRY;
 
   g_return_if_fail (IDE_IS_WORKSPACE (self));
   g_return_if_fail (mru_link != NULL);
   g_return_if_fail (IDE_IS_PAGE (mru_link->data));
 
+  mru_page = mru_link->data;
+
   g_debug ("Removing %s from page MRU",
-           G_OBJECT_TYPE_NAME (mru_link->data));
+           G_OBJECT_TYPE_NAME (mru_page));
 
   g_queue_unlink (&priv->page_mru, mru_link);
+
+  if ((gpointer)mru_page == priv->current_page_ptr)
+    {
+      g_clear_weak_pointer (&priv->current_page_ptr);
+      ide_extension_set_adapter_foreach (priv->addins,
+                                         ide_workspace_addin_page_changed_cb,
+                                         NULL);
+    }
+
+  IDE_EXIT;
 }
 
 void