[gnome-builder/wip/gtk4-port] libide/editor: keep hold on IdeBuffer

[Christian Hergert <chergert src gnome org>]

commit bff0c6b82cb5c92158627a0a0d5bd75a3ec90b9e
Author: Christian Hergert <chergert redhat com>
Date:   Mon Apr 4 14:57:10 2022 -0700

    libide/editor: keep hold on IdeBuffer
    
    We don't want this to get GC'd periodically due to IdeObjectBox cleanup,
    so ensure we add a hold on the object while the view is active.

 src/libide/editor/ide-editor-page.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/editor/ide-editor-page.c b/src/libide/editor/ide-editor-page.c
index 446b06abf..66ed3ce94 100644
--- a/src/libide/editor/ide-editor-page.c
+++ b/src/libide/editor/ide-editor-page.c
@@ -61,6 +61,8 @@ ide_editor_page_set_buffer (IdeEditorPage *self,
 
   if (g_set_object (&self->buffer, buffer))
     {
+      ide_buffer_hold (buffer);
+
       gtk_text_view_set_buffer (GTK_TEXT_VIEW (self->view), GTK_TEXT_BUFFER (buffer));
 
       g_signal_connect_object (buffer,
@@ -118,7 +120,12 @@ ide_editor_page_dispose (GObject *object)
 
   g_clear_object (&self->buffer_file_settings);
   g_clear_object (&self->view_file_settings);
-  g_clear_object (&self->buffer);
+
+  if (self->buffer != NULL)
+    {
+      ide_buffer_release (self->buffer);
+      g_clear_object (&self->buffer);
+    }
 
   G_OBJECT_CLASS (ide_editor_page_parent_class)->dispose (object);
 }