content/events/src/nsDOMNotifyPaintEvent.cpp

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   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  22  * Contributor(s):
  23  *  Robert O'Callahan <robert@ocallahan.org>
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  25  * Alternatively, the contents of this file may be used under the terms of
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsDOMNotifyPaintEvent.h"
  40 #include "nsContentUtils.h"
  41 #include "nsClientRect.h"
  42
  43 nsDOMNotifyPaintEvent::nsDOMNotifyPaintEvent(nsPresContext* aPresContext,
  44                                              nsNotifyPaintEvent* aEvent)
  45   : nsDOMEvent(aPresContext, aEvent ? aEvent :
  46                new nsNotifyPaintEvent(PR_FALSE, 0, nsRegion(), nsRegion()))
  47 {
  48   if (aEvent) {
  49     mEventIsInternal = PR_FALSE;
  50   }
  51   else
  52   {
  53     mEventIsInternal = PR_TRUE;
  54     mEvent->time = PR_Now();
  55   }
  56 }
  57
  58 nsDOMNotifyPaintEvent::~nsDOMNotifyPaintEvent()
  59 {
  60   if (mEventIsInternal) {
  61     if (mEvent->eventStructType == NS_NOTIFYPAINT_EVENT) {
  62       delete static_cast<nsNotifyPaintEvent*>(mEvent);
  63       mEvent = nsnull;
  64     }
  65   }
  66 }
  67
  68 NS_INTERFACE_MAP_BEGIN(nsDOMNotifyPaintEvent)
  69   NS_INTERFACE_MAP_ENTRY(nsIDOMNotifyPaintEvent)
  70   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(NotifyPaintEvent)
  71 NS_INTERFACE_MAP_END_INHERITING(nsDOMEvent)
  72
  73 NS_IMPL_ADDREF_INHERITED(nsDOMNotifyPaintEvent, nsDOMEvent)
  74 NS_IMPL_RELEASE_INHERITED(nsDOMNotifyPaintEvent, nsDOMEvent)
  75
  76 nsRegion
  77 nsDOMNotifyPaintEvent::GetRegion()
  78 {
  79   nsNotifyPaintEvent* event = static_cast<nsNotifyPaintEvent*>(mEvent);
  80
  81   nsRegion r;
  82   if (nsContentUtils::IsCallerTrustedForRead()) {
  83     r.Or(event->sameDocRegion, event->crossDocRegion);
  84   } else {
  85     r = event->sameDocRegion;
  86   }
  87   return r;
  88 }
  89
  90 NS_IMETHODIMP
  91 nsDOMNotifyPaintEvent::GetBoundingClientRect(nsIDOMClientRect** aResult)
  92 {
  93   // Weak ref, since we addref it below
  94   nsClientRect* rect = new nsClientRect();
  95   if (!rect)
  96     return NS_ERROR_OUT_OF_MEMORY;
  97
  98   NS_ADDREF(*aResult = rect);
  99   if (!mPresContext)
 100     return NS_OK;
 101
 102   rect->SetLayoutRect(GetRegion().GetBounds(), mPresContext);
 103   return NS_OK;
 104 }
 105
 106 NS_IMETHODIMP
 107 nsDOMNotifyPaintEvent::GetClientRects(nsIDOMClientRectList** aResult)
 108 {
 109   nsRefPtr<nsClientRectList> rectList = new nsClientRectList();
 110   if (!rectList)
 111     return NS_ERROR_OUT_OF_MEMORY;
 112
 113   nsRegion r = GetRegion();
 114   nsRegionRectIterator iter(r);
 115   for (const nsRect* rgnRect = iter.Next(); rgnRect; rgnRect = iter.Next()) {
 116     nsRefPtr<nsClientRect> rect = new nsClientRect();
 117     if (!rect)
 118       return NS_ERROR_OUT_OF_MEMORY;
 119
 120     rect->SetLayoutRect(*rgnRect, mPresContext);
 121     rectList->Append(rect);
 122   }
 123
 124   *aResult = rectList.forget().get();
 125   return NS_OK;
 126 }
 127
 128 nsresult NS_NewDOMNotifyPaintEvent(nsIDOMEvent** aInstancePtrResult,
 129                                    nsPresContext* aPresContext,
 130                                    nsNotifyPaintEvent *aEvent)
 131 {
 132   nsDOMNotifyPaintEvent* it =
 133     new nsDOMNotifyPaintEvent(aPresContext, aEvent);
 134   if (nsnull == it) {
 135     return NS_ERROR_OUT_OF_MEMORY;
 136   }
 137
 138   return CallQueryInterface(it, aInstancePtrResult);
 139 }