dom/events/InternalMutationEvent.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_MutationEvent_h__
   8 #define mozilla_MutationEvent_h__
   9
  10 #include "mozilla/BasicEvents.h"
  11 #include "nsCOMPtr.h"
  12 #include "nsAtom.h"
  13 #include "nsINode.h"
  14
  15 namespace mozilla {
  16
  17 class InternalMutationEvent : public WidgetEvent {
  18  public:
  19   virtual InternalMutationEvent* AsMutationEvent() override { return this; }
  20
  21   InternalMutationEvent(bool aIsTrusted, EventMessage aMessage)
  22       : WidgetEvent(aIsTrusted, aMessage, eMutationEventClass), mAttrChange(0) {
  23     mFlags.mCancelable = false;
  24   }
  25
  26   virtual WidgetEvent* Duplicate() const override {
  27     MOZ_ASSERT(mClass == eMutationEventClass,
  28                "Duplicate() must be overridden by sub class");
  29     InternalMutationEvent* result = new InternalMutationEvent(false, mMessage);
  30     result->AssignMutationEventData(*this, true);
  31     result->mFlags = mFlags;
  32     return result;
  33   }
  34
  35   nsCOMPtr<nsINode> mRelatedNode;
  36   RefPtr<nsAtom> mAttrName;
  37   RefPtr<nsAtom> mPrevAttrValue;
  38   RefPtr<nsAtom> mNewAttrValue;
  39   unsigned short mAttrChange;
  40
  41   void AssignMutationEventData(const InternalMutationEvent& aEvent,
  42                                bool aCopyTargets) {
  43     AssignEventData(aEvent, aCopyTargets);
  44
  45     mRelatedNode = aEvent.mRelatedNode;
  46     mAttrName = aEvent.mAttrName;
  47     mPrevAttrValue = aEvent.mPrevAttrValue;
  48     mNewAttrValue = aEvent.mNewAttrValue;
  49     mAttrChange = aEvent.mAttrChange;
  50   }
  51 };
  52
  53 // Bits are actually checked to optimize mutation event firing.
  54 // That's why I don't number from 0x00.  The first event should
  55 // always be 0x01.
  56 #define NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED 0x01
  57 #define NS_EVENT_BITS_MUTATION_NODEINSERTED 0x02
  58 #define NS_EVENT_BITS_MUTATION_NODEREMOVED 0x04
  59 #define NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT 0x08
  60 #define NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT 0x10
  61 #define NS_EVENT_BITS_MUTATION_ATTRMODIFIED 0x20
  62 #define NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED 0x40
  63
  64 }  // namespace mozilla
  65
  66 #endif  // mozilla_MutationEvent_h__