From 8901f407590f82db060dd1bb388dd80209356035 Mon Sep 17 00:00:00 2001
From: Heeyong Song <heeyong.song@samsung.com>
Date: Mon, 9 Nov 2020 16:30:18 +0900
Subject: [PATCH] Stop observing visuals when a control is destroyed

Change-Id: I6c46f3090cfb8235ed0a081ab328d48c410f039e
---
 .../src/dali-toolkit/utc-Dali-Control.cpp          | 25 ++++++++++++++++++++++
 .../controls/control/control-data-impl.cpp         | 10 +++++++++
 2 files changed, 35 insertions(+)

diff --git a/automated-tests/src/dali-toolkit/utc-Dali-Control.cpp b/automated-tests/src/dali-toolkit/utc-Dali-Control.cpp
index 396bab4..ddca23f 100644
--- a/automated-tests/src/dali-toolkit/utc-Dali-Control.cpp
+++ b/automated-tests/src/dali-toolkit/utc-Dali-Control.cpp
@@ -1244,3 +1244,28 @@ int UtcDaliControlDoActionWhenNotStage(void)
 
   END_TEST;
 }
+
+int UtcDaliControlStopObservingVisual(void)
+{
+  ToolkitTestApplication application;
+  tet_infoline( "Test to stop observing a visual when a control is destroyed" );
+
+  Control control = Control::New();
+  control[Actor::Property::SIZE] = Vector2( 200.f, 200.f );
+  control[Control::Property::BACKGROUND] = "invalid.svg";
+
+  application.GetScene().Add( control );
+
+  application.SendNotification();
+  application.Render();
+
+  // Delete control
+  control.Unparent();
+  control.Reset();
+
+  // SVG rasterization may be finished after the control is deleted.
+  // Ensure it doesn't cause a crash.
+  DALI_TEST_EQUALS( Test::WaitForEventThreadTrigger( 1 ), true, TEST_LOCATION );
+
+  END_TEST;
+}
diff --git a/dali-toolkit/internal/controls/control/control-data-impl.cpp b/dali-toolkit/internal/controls/control/control-data-impl.cpp
index df01b27..9182c1f 100755
--- a/dali-toolkit/internal/controls/control/control-data-impl.cpp
+++ b/dali-toolkit/internal/controls/control/control-data-impl.cpp
@@ -459,6 +459,16 @@ Control::Impl::Impl( Control& controlImpl )
 
 Control::Impl::~Impl()
 {
+  for( auto&& iter : mVisuals )
+  {
+    StopObservingVisual( iter->visual );
+  }
+
+  for( auto&& iter : mRemoveVisuals )
+  {
+    StopObservingVisual( iter->visual );
+  }
+
   AccessibilityDeregister();
   // All gesture detectors will be destroyed so no need to disconnect.
   delete mStartingPinchScale;
-- 
2.7.4