content/events/src/nsDOMDataContainerEvent.cpp

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  22  * Contributor(s):
  23  *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsDOMDataContainerEvent.h"
  40
  41 #include "nsContentUtils.h"
  42
  43 nsDOMDataContainerEvent::nsDOMDataContainerEvent(nsPresContext *aPresContext,
  44                                                  nsEvent *aEvent)
  45   : nsDOMEvent(aPresContext, aEvent)
  46 {
  47   mData.Init();
  48 }
  49
  50 NS_IMPL_CYCLE_COLLECTION_CLASS(nsDOMDataContainerEvent)
  51
  52 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsDOMDataContainerEvent,
  53                                                 nsDOMEvent)
  54   if (tmp->mData.IsInitialized())
  55     tmp->mData.Clear();
  56 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  57
  58 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsDOMDataContainerEvent,
  59                                                   nsDOMEvent)
  60   tmp->mData.EnumerateRead(TraverseEntry, &cb);
  61 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  62
  63 NS_IMPL_ADDREF_INHERITED(nsDOMDataContainerEvent, nsDOMEvent)
  64 NS_IMPL_RELEASE_INHERITED(nsDOMDataContainerEvent, nsDOMEvent)
  65
  66 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsDOMDataContainerEvent)
  67   NS_INTERFACE_MAP_ENTRY(nsIDOMDataContainerEvent)
  68   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(DataContainerEvent)
  69 NS_INTERFACE_MAP_END_INHERITING(nsDOMEvent)
  70
  71 NS_IMETHODIMP
  72 nsDOMDataContainerEvent::GetData(const nsAString& aKey, nsIVariant **aData)
  73 {
  74   NS_ENSURE_ARG_POINTER(aData);
  75
  76   NS_ENSURE_STATE(mData.IsInitialized());
  77
  78   mData.Get(aKey, aData);
  79   return NS_OK;
  80 }
  81
  82 NS_IMETHODIMP
  83 nsDOMDataContainerEvent::SetData(const nsAString& aKey, nsIVariant *aData)
  84 {
  85   NS_ENSURE_ARG(aData);
  86
  87   // Make sure this event isn't already being dispatched.
  88   NS_ENSURE_STATE(!(NS_IS_EVENT_IN_DISPATCH(mEvent)));
  89   NS_ENSURE_STATE(mData.IsInitialized());
  90   return mData.Put(aKey, aData) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
  91 }
  92
  93 nsresult
  94 NS_NewDOMDataContainerEvent(nsIDOMEvent** aInstancePtrResult,
  95                    nsPresContext* aPresContext,
  96                    nsEvent* aEvent)
  97 {
  98   nsDOMDataContainerEvent* it =
  99     new nsDOMDataContainerEvent(aPresContext, aEvent);
 100   NS_ENSURE_TRUE(it, NS_ERROR_OUT_OF_MEMORY);
 101
 102   return CallQueryInterface(it, aInstancePtrResult);
 103 }
 104
 105 PLDHashOperator
 106 nsDOMDataContainerEvent::TraverseEntry(const nsAString& aKey,
 107                                        nsIVariant *aDataItem,
 108                                        void* aUserArg)
 109 {
 110   nsCycleCollectionTraversalCallback *cb =
 111     static_cast<nsCycleCollectionTraversalCallback*>(aUserArg);
 112   cb->NoteXPCOMChild(aDataItem);
 113
 114   return PL_DHASH_NEXT;
 115 }
 116