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                         const WidgetEventTime* aTime = nullptr)
  23       : WidgetEvent(aIsTrusted, aMessage, eMutationEventClass, aTime),
  24         mAttrChange(0) {
  25     mFlags.mCancelable = false;
  26   }
  27
  28   virtual WidgetEvent* Duplicate() const override {
  29     MOZ_ASSERT(mClass == eMutationEventClass,
  30                "Duplicate() must be overridden by sub class");
  31     InternalMutationEvent* result =
  32         new InternalMutationEvent(false, mMessage, this);
  33     result->AssignMutationEventData(*this, true);
  34     result->mFlags = mFlags;
  35     return result;
  36   }
  37
  38   nsCOMPtr<nsINode> mRelatedNode;
  39   RefPtr<nsAtom> mAttrName;
  40   RefPtr<nsAtom> mPrevAttrValue;
  41   RefPtr<nsAtom> mNewAttrValue;
  42   unsigned short mAttrChange;
  43
  44   void AssignMutationEventData(const InternalMutationEvent& aEvent,
  45                                bool aCopyTargets) {
  46     AssignEventData(aEvent, aCopyTargets);
  47
  48     mRelatedNode = aEvent.mRelatedNode;
  49     mAttrName = aEvent.mAttrName;
  50     mPrevAttrValue = aEvent.mPrevAttrValue;
  51     mNewAttrValue = aEvent.mNewAttrValue;
  52     mAttrChange = aEvent.mAttrChange;
  53   }
  54 };
  55
  56 // Bits are actually checked to optimize mutation event firing.
  57 // That's why I don't number from 0x00.  The first event should
  58 // always be 0x01.
  59 #define NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED 0x01
  60 #define NS_EVENT_BITS_MUTATION_NODEINSERTED 0x02
  61 #define NS_EVENT_BITS_MUTATION_NODEREMOVED 0x04
  62 #define NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT 0x08
  63 #define NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT 0x10
  64 #define NS_EVENT_BITS_MUTATION_ATTRMODIFIED 0x20
  65 #define NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED 0x40
  66
  67 #define NS_EVENT_BITS_MUTATION_ALL                                            \
  68   (NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED |                                   \
  69    NS_EVENT_BITS_MUTATION_NODEINSERTED | NS_EVENT_BITS_MUTATION_NODEREMOVED | \
  70    NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |                           \
  71    NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT |                          \
  72    NS_EVENT_BITS_MUTATION_ATTRMODIFIED |                                      \
  73    NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED)
  74
  75 }  // namespace mozilla
  76
  77 #endif  // mozilla_MutationEvent_h__