C++ (Cpp) CharacterDataOldValue示例

示例#1

文件： nsDOMMutationObserver.cpp 项目： moosilauke18/gecko-dev

void
nsMutationReceiver::CharacterDataWillChange(nsIDocument *aDocument,
                                            nsIContent* aContent,
                                            CharacterDataChangeInfo* aInfo)
{
  if (nsAutoMutationBatch::IsBatching() ||
      !CharacterData() ||
      (!Subtree() && aContent != Target()) ||
      (Subtree() && RegisterTarget()->SubtreeRoot() != aContent->SubtreeRoot()) ||
      !IsObservable(aContent)) {
    return;
  }

  nsDOMMutationRecord* m =
    Observer()->CurrentRecord(nsGkAtoms::characterData);

  NS_ASSERTION(!m->mTarget || m->mTarget == aContent,
               "Wrong target!");

  if (!m->mTarget) {
    m->mTarget = aContent;
  }
  if (CharacterDataOldValue() && m->mPrevValue.IsVoid()) { 
    aContent->GetText()->AppendTo(m->mPrevValue);
  }
}

示例#2

文件： nsDOMMutationObserver.cpp 项目： Pulfer/Pale-Moon

void
nsMutationReceiver::CharacterDataWillChange(nsIDocument *aDocument,
                                            nsIContent* aContent,
                                            CharacterDataChangeInfo* aInfo)
{
  if (nsAutoMutationBatch::IsBatching() ||
      !CharacterData() || !(Subtree() || aContent == Target()) ||
      aContent->ChromeOnlyAccess()) {
    return;
  }
  
  nsDOMMutationRecord* m =
    Observer()->CurrentRecord(NS_LITERAL_STRING("characterData"));
 
  NS_ASSERTION(!m->mTarget || m->mTarget == aContent,
               "Wrong target!");

  if (!m->mTarget) {
    m->mTarget = aContent;
  }
  if (CharacterDataOldValue() && m->mPrevValue.IsVoid()) { 
    aContent->GetText()->AppendTo(m->mPrevValue);
  }
}