Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/Sources/formale Sprachen/C/Firefox/editor/libeditor/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 6 kB

Quelle DeleteNodeTransaction.cpp Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "DeleteNodeTransaction.h"

#include "EditorBase.h"
#include "EditorDOMPoint.h"
#include "HTMLEditUtils.h"
#include "SelectionState.h"  // RangeUpdater
#include "TextEditor.h"

#include "mozilla/Logging.h"
#include "mozilla/ToString.h"

#include "nsDebug.h"
#include "nsError.h"
#include "nsAString.h"

namespace mozilla {

// static
already_AddRefed<DeleteNodeTransaction> DeleteNodeTransaction::MaybeCreate(
    EditorBase& aEditorBase, nsIContent& aContentToDelete) {
  RefPtr<DeleteNodeTransaction> transaction =
      new DeleteNodeTransaction(aEditorBase, aContentToDelete);
  if (NS_WARN_IF(!transaction->CanDoIt())) {
    return nullptr;
  }
  return transaction.forget();
}

DeleteNodeTransaction::DeleteNodeTransaction(EditorBase& aEditorBase,
                                             nsIContent& aContentToDelete)
    : DeleteContentTransactionBase(aEditorBase),
      mContentToDelete(&aContentToDelete),
      mParentNode(aContentToDelete.GetParentNode()) {
  MOZ_DIAGNOSTIC_ASSERT_IF(
      aEditorBase.IsHTMLEditor(),
      HTMLEditUtils::IsRemovableNode(aContentToDelete) ||
          // It's okay to delete text node if it's added by `HTMLEditor` since
          // remaining it may be noisy for the users.
          (aContentToDelete.IsText() &&
           aContentToDelete.HasFlag(NS_MAYBE_MODIFIED_FREQUENTLY)));
  NS_ASSERTION(
      !aEditorBase.IsHTMLEditor() ||
          HTMLEditUtils::IsRemovableNode(aContentToDelete),
      "Deleting non-editable text node, please write a test for this!!");
}

std::ostream& operator<<(std::ostream& aStream,
                         const DeleteNodeTransaction& aTransaction) {
  aStream << "{ mContentToDelete=" << aTransaction.mContentToDelete.get();
  if (aTransaction.mContentToDelete) {
    aStream << " (" << *aTransaction.mContentToDelete << ")";
  }
  aStream << ", mParentNode=" << aTransaction.mParentNode.get();
  if (aTransaction.mParentNode) {
    aStream << " (" << *aTransaction.mParentNode << ")";
  }
  aStream << ", mRefContent=" << aTransaction.mRefContent.get();
  if (aTransaction.mRefContent) {
    aStream << " (" << *aTransaction.mRefContent << ")";
  }
  aStream << ", mEditorBase=" << aTransaction.mEditorBase.get() << " }";
  return aStream;
}

NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteNodeTransaction,
                                   DeleteContentTransactionBase,
                                   mContentToDelete, mParentNode, mRefContent)

NS_IMPL_ADDREF_INHERITED(DeleteNodeTransaction, DeleteContentTransactionBase)
NS_IMPL_RELEASE_INHERITED(DeleteNodeTransaction, DeleteContentTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteNodeTransaction)
NS_INTERFACE_MAP_END_INHERITING(DeleteContentTransactionBase)

bool DeleteNodeTransaction::CanDoIt() const {
  if (NS_WARN_IF(!mContentToDelete) || NS_WARN_IF(!mEditorBase) ||
      !mParentNode) {
    return false;
  }
  return mEditorBase->IsTextEditor() ||
         HTMLEditUtils::IsSimplyEditableNode(*mParentNode);
}

NS_IMETHODIMP DeleteNodeTransaction::DoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (NS_WARN_IF(!CanDoIt())) {
    return NS_OK;
  }

  MOZ_ASSERT_IF(mEditorBase->IsTextEditor(), !mContentToDelete->IsText());

  // Remember which child mContentToDelete was (by remembering which child was
  // next).  Note that mRefContent can be nullptr.
  mRefContent = mContentToDelete->GetNextSibling();

  // give range updater a chance.  SelAdjDeleteNode() needs to be called
  // *before* we do the action, unlike some of the other RangeItem update
  // methods.
  mEditorBase->RangeUpdaterRef().SelAdjDeleteNode(*mContentToDelete);

  OwningNonNull<nsINode> parentNode = *mParentNode;
  OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
  ErrorResult error;
  parentNode->RemoveChild(contentToDelete, error);
  NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
  return error.StealNSResult();
}

EditorDOMPoint DeleteNodeTransaction::SuggestPointToPutCaret() const {
  return EditorDOMPoint();
}

NS_IMETHODIMP DeleteNodeTransaction::UndoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (NS_WARN_IF(!CanDoIt())) {
    // This is a legal state, the transaction is a no-op.
    return NS_OK;
  }
  ErrorResult error;
  OwningNonNull<EditorBase> editorBase = *mEditorBase;
  OwningNonNull<nsINode> parentNode = *mParentNode;
  OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
  nsCOMPtr<nsIContent> refContent = mRefContent;
  // XXX Perhaps, we should check `refContent` is a child of `parentNode`,
  //     and if it's not, we should stop undoing or something.
  parentNode->InsertBefore(contentToDelete, refContent, error);
  // InsertBefore() may call MightThrowJSException() even if there is no error.
  // We don't need the flag here.
  error.WouldReportJSException();
  if (error.Failed()) {
    NS_WARNING("nsINode::InsertBefore() failed");
    return error.StealNSResult();
  }
  return NS_OK;
}

NS_IMETHODIMP DeleteNodeTransaction::RedoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p DeleteNodeTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (NS_WARN_IF(!CanDoIt())) {
    // This is a legal state, the transaction is a no-op.
    return NS_OK;
  }

  mEditorBase->RangeUpdaterRef().SelAdjDeleteNode(*mContentToDelete);

  OwningNonNull<nsINode> parentNode = *mParentNode;
  OwningNonNull<nsIContent> contentToDelete = *mContentToDelete;
  ErrorResult error;
  parentNode->RemoveChild(contentToDelete, error);
  NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
  return error.StealNSResult();
}

}  // namespace mozilla

quality100%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.