Merge pull request #554 from MoonchildProductions/issue12

Resolve potential null deref crashes in the editor

1 files changed, 34 insertions, 0 deletions

diff --git a/widget/WidgetEventImpl.cpp b/widget/WidgetEventImpl.cpp
index 7dd292cb0..59c80672b 100644
--- a/widget/WidgetEventImpl.cpp
+++ b/widget/WidgetEventImpl.cpp
@@ -12,6 +12,7 @@
 #include "mozilla/Preferences.h"
 #include "mozilla/TextEvents.h"
 #include "mozilla/TouchEvents.h"
+#include "nsIDOMEventTarget.h"
 #include "nsPrintfCString.h"
 
 namespace mozilla {
@@ -411,6 +412,39 @@ WidgetEvent::IsAllowedToDispatchDOMEvent() const
 }
 
 /******************************************************************************
+ * mozilla::WidgetEvent
+ *
+ * Misc methods.
+ ******************************************************************************/
+
+static dom::EventTarget*
+GetTargetForDOMEvent(nsIDOMEventTarget* aTarget)
+{
+  return aTarget ? aTarget->GetTargetForDOMEvent() : nullptr;
+}
+
+dom::EventTarget*
+WidgetEvent::GetDOMEventTarget() const
+{
+  return GetTargetForDOMEvent(mTarget);
+}
+
+dom::EventTarget*
+WidgetEvent::GetCurrentDOMEventTarget() const
+{
+  return GetTargetForDOMEvent(mCurrentTarget);
+}
+
+dom::EventTarget*
+WidgetEvent::GetOriginalDOMEventTarget() const
+{
+  if (mOriginalTarget) {
+    return GetTargetForDOMEvent(mOriginalTarget);
+  }
+  return GetDOMEventTarget();
+}
+
+/******************************************************************************
  * mozilla::WidgetInputEvent
  ******************************************************************************/