/* * Copyright (C) 2019 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "UndoManager.h" #include "CustomUndoStep.h" #include "Document.h" #include "Editor.h" #include "Frame.h" #include "UndoItem.h" #include <wtf/IsoMallocInlines.h> namespace WebCore { WTF_MAKE_ISO_ALLOCATED_IMPL(UndoManager); UndoManager::UndoManager(Document& document) : m_document(document) { } UndoManager::~UndoManager() = default; ExceptionOr<void> UndoManager::addItem(Ref<UndoItem>&& item) { if (item->undoManager()) return Exception { InvalidModificationError, "This item has already been added to an UndoManager"_s }; auto frame = makeRefPtr(m_document.frame()); if (!frame) return Exception { SecurityError, "A browsing context is required to add an UndoItem"_s }; item->setUndoManager(this); frame->editor().registerCustomUndoStep(CustomUndoStep::create(item)); m_items.add(WTFMove(item)); return { }; } void UndoManager::removeItem(UndoItem& item) { if (auto foundItem = m_items.take(&item)) foundItem->setUndoManager(nullptr); } void UndoManager::removeAllItems() { for (auto& item : m_items) item->setUndoManager(nullptr); m_items.clear(); } } // namespace WebCore