content/events/src/nsDOMBeforeUnloadEvent.cpp

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  23  *   Johnny Stenback <jst@mozilla.org> (original author)
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  38
  39 #include "nsDOMBeforeUnloadEvent.h"
  40 #include "nsContentUtils.h"
  41
  42 nsDOMBeforeUnloadEvent::nsDOMBeforeUnloadEvent(nsPresContext* aPresContext,
  43                                                nsBeforePageUnloadEvent* aEvent)
  44   : nsDOMEvent(aPresContext, aEvent ? aEvent :
  45                new nsBeforePageUnloadEvent(PR_FALSE,
  46                                            NS_BEFORE_PAGE_UNLOAD_EVENT))
  47 {
  48   NS_ASSERTION(mEvent->eventStructType == NS_BEFORE_PAGE_UNLOAD_EVENT,
  49                "event type mismatch");
  50
  51   if (aEvent) {
  52     mEventIsInternal = PR_FALSE;
  53   }
  54   else {
  55     mEventIsInternal = PR_TRUE;
  56     mEvent->time = PR_Now();
  57   }
  58 }
  59
  60 nsDOMBeforeUnloadEvent::~nsDOMBeforeUnloadEvent()
  61 {
  62   if (mEventIsInternal &&
  63       mEvent->eventStructType == NS_BEFORE_PAGE_UNLOAD_EVENT) {
  64     delete static_cast<nsBeforePageUnloadEvent*>(mEvent);
  65     mEvent = nsnull;
  66   }
  67 }
  68
  69 NS_IMPL_ADDREF_INHERITED(nsDOMBeforeUnloadEvent, nsDOMEvent)
  70 NS_IMPL_RELEASE_INHERITED(nsDOMBeforeUnloadEvent, nsDOMEvent)
  71
  72 NS_INTERFACE_MAP_BEGIN(nsDOMBeforeUnloadEvent)
  73   NS_INTERFACE_MAP_ENTRY(nsIDOMBeforeUnloadEvent)
  74   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(BeforeUnloadEvent)
  75 NS_INTERFACE_MAP_END_INHERITING(nsDOMEvent)
  76
  77 NS_IMETHODIMP
  78 nsDOMBeforeUnloadEvent::SetReturnValue(const nsAString& aReturnValue)
  79 {
  80   ((nsBeforePageUnloadEvent *)mEvent)->text = aReturnValue;
  81
  82   return NS_OK;  // Don't throw an exception
  83 }
  84
  85 NS_IMETHODIMP
  86 nsDOMBeforeUnloadEvent::GetReturnValue(nsAString& aReturnValue)
  87 {
  88   aReturnValue = ((nsBeforePageUnloadEvent *)mEvent)->text;
  89
  90   return NS_OK;  // Don't throw an exception
  91 }
  92
  93 nsresult NS_NewDOMBeforeUnloadEvent(nsIDOMEvent** aInstancePtrResult,
  94                                     nsPresContext* aPresContext,
  95                                     nsBeforePageUnloadEvent *aEvent)
  96 {
  97   nsDOMBeforeUnloadEvent* it =
  98     new nsDOMBeforeUnloadEvent(aPresContext, aEvent);
  99   if (!it) {
 100     return NS_ERROR_OUT_OF_MEMORY;
 101   }
 102
 103   return CallQueryInterface(it, aInstancePtrResult);
 104 }