Mozilla/mozilla/content/events/src/nsDOMMutationEvent.cpp

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#include "nsCOMPtr.h"
#include "nsIDOMMutationEvent.h"
#include "nsDOMEvent.h"
#include "nsMutationEvent.h"
#include "nsContentUtils.h"

class nsIPresContext;

class nsDOMMutationEvent : public nsDOMEvent, public nsIDOMMutationEvent
{
  NS_DECL_NSIDOMMUTATIONEVENT
  NS_FORWARD_NSIDOMEVENT(nsDOMEvent::)
  
  NS_DECL_ISUPPORTS_INHERITED

  nsDOMMutationEvent(nsIPresContext* aPresContext, 
                     nsEvent* aEvent);

  ~nsDOMMutationEvent();
};

nsDOMMutationEvent::nsDOMMutationEvent(nsIPresContext* aPresContext,
                                       nsEvent* aEvent)
  :nsDOMEvent(aPresContext, aEvent, NS_LITERAL_STRING("MutationEvents")) 
{  
  if ( aEvent ) {
    nsMutationEvent* mutation = (nsMutationEvent*)aEvent;
    SetTarget(mutation->mTarget);
  }
}

nsDOMMutationEvent::~nsDOMMutationEvent() {
  
}

NS_INTERFACE_MAP_BEGIN(nsDOMMutationEvent)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMMutationEvent)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIDOMEvent, nsIDOMMutationEvent)
  NS_INTERFACE_MAP_ENTRY(nsIPrivateDOMEvent)
  NS_INTERFACE_MAP_ENTRY(nsIDOMMutationEvent)
  NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(MutationEvent)
NS_INTERFACE_MAP_END

NS_IMPL_ADDREF_INHERITED(nsDOMMutationEvent, nsDOMEvent)
NS_IMPL_RELEASE_INHERITED(nsDOMMutationEvent, nsDOMEvent)


NS_IMETHODIMP
nsDOMMutationEvent::GetRelatedNode(nsIDOMNode** aRelatedNode)
{
  *aRelatedNode = nsnull;
  if (mEvent) {
    nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
    *aRelatedNode = mutation->mRelatedNode;
    NS_IF_ADDREF(*aRelatedNode);
  }
  else *aRelatedNode = nsnull;

  return NS_OK;
}

NS_IMETHODIMP
nsDOMMutationEvent::GetPrevValue(nsAWritableString& aPrevValue)
{
  if (mEvent) {
    nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
    if (mutation && mutation->mPrevAttrValue)
      mutation->mPrevAttrValue->ToString(aPrevValue);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsDOMMutationEvent::GetNewValue(nsAWritableString& aNewValue)
{
  if (mEvent) {
    nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
    if (mutation && mutation->mNewAttrValue)
      mutation->mNewAttrValue->ToString(aNewValue);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsDOMMutationEvent::GetAttrName(nsAWritableString& aAttrName)
{
  if (mEvent) {
    nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
    if (mutation && mutation->mAttrName)
      mutation->mAttrName->ToString(aAttrName);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsDOMMutationEvent::GetAttrChange(PRUint16* aAttrChange)
{
  *aAttrChange = 0;
  if (mEvent) {
    nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
    if (mutation && mutation->mAttrChange)
      *aAttrChange = mutation->mAttrChange;
  }
  return NS_OK;
}

NS_IMETHODIMP
nsDOMMutationEvent::InitMutationEvent(const nsAReadableString& aTypeArg, PRBool aCanBubbleArg, 
                                      PRBool aCancelableArg, nsIDOMNode* aRelatedNodeArg, 
                                      const nsAReadableString& aPrevValueArg, 
                                      const nsAReadableString& aNewValueArg, 
                                      const nsAReadableString& aAttrNameArg,
                                      PRUint16 aAttrChangeArg)
{
  NS_ENSURE_SUCCESS(SetEventType(aTypeArg), NS_ERROR_FAILURE);
  mEvent->flags |= aCanBubbleArg ? NS_EVENT_FLAG_NONE : NS_EVENT_FLAG_CANT_BUBBLE;
  mEvent->flags |= aCancelableArg ? NS_EVENT_FLAG_NONE : NS_EVENT_FLAG_CANT_CANCEL;
  
  nsMutationEvent* mutation = NS_STATIC_CAST(nsMutationEvent*, mEvent);
  if (mutation) {
    mutation->mRelatedNode = aRelatedNodeArg;
    if (!aPrevValueArg.IsEmpty())
      mutation->mPrevAttrValue = getter_AddRefs(NS_NewAtom(aPrevValueArg));
    if (!aNewValueArg.IsEmpty())
      mutation->mNewAttrValue = getter_AddRefs(NS_NewAtom(aNewValueArg));
    if (!aAttrNameArg.IsEmpty()) {
      mutation->mAttrName = getter_AddRefs(NS_NewAtom(aAttrNameArg));
    }
    mutation->mAttrChange = aAttrChangeArg;
  }
    
  return NS_OK;
};

nsresult NS_NewDOMMutationEvent(nsIDOMEvent** aInstancePtrResult,
                                nsIPresContext* aPresContext,
                                nsEvent *aEvent) 
{
  nsDOMMutationEvent* it = new nsDOMMutationEvent(aPresContext, aEvent);
  if (nsnull == it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  
  return it->QueryInterface(NS_GET_IID(nsIDOMEvent), (void **) aInstancePtrResult);
}