From 72c8020b8036c0f4dce9ce6c0e269a29624ed6f2 Mon Sep 17 00:00:00 2001
From: "Johan B. C. Engelen" <jbc.engelen@swissonline.ch>
Date: Mon, 16 Jun 2014 01:02:03 +0200
Subject: add proper refcounting to XML SignalObserver. not refcounting caused
 crash upon opening Filter Editor dialog for the first time with a filtered
 object selected.

Fixed bugs:
  - https://launchpad.net/bugs/1328152

(bzr r13426)
---
 src/xml/helper-observer.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src/xml')

diff --git a/src/xml/helper-observer.cpp b/src/xml/helper-observer.cpp
index c54dd8e74..e56ddc6f8 100644
--- a/src/xml/helper-observer.cpp
+++ b/src/xml/helper-observer.cpp
@@ -5,7 +5,7 @@ namespace XML {
 
 // Very simple observer that just emits a signal if anything happens to a node
 SignalObserver::SignalObserver()
-    : _oldsel(0)
+    : _oldsel(NULL)
 {}
 
 // Add this observer to the SPObject and remove it from any previous object
@@ -13,17 +13,21 @@ void SignalObserver::set(SPObject* o)
 {
   // XML Tree being used direcly in this function in the following code
   //   while it shouldn't be
+  // Pointer to object is stored, so refcounting should be increased/decreased
     if(_oldsel) {
         if (_oldsel->getRepr()) {
             _oldsel->getRepr()->removeObserver(*this);
         }
+        sp_object_unref(_oldsel);
+        _oldsel = NULL;
     }
     if(o) {
         if (o->getRepr()) {
             o->getRepr()->addObserver(*this);
+            sp_object_ref(o);
+            _oldsel = o;
         }
     }
-    _oldsel = o;
 }
 
 void SignalObserver::notifyChildAdded(XML::Node&, XML::Node&, XML::Node*)
-- 
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