/* -*- 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 "mozilla/EditorBase.h" #include "mozilla/SelectionState.h" // RangeUpdater #include "nsDebug.h" #include "nsError.h" #include "nsAString.h" namespace mozilla { DeleteNodeTransaction::DeleteNodeTransaction() : mEditorBase(nullptr) , mRangeUpdater(nullptr) { } DeleteNodeTransaction::~DeleteNodeTransaction() { } NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteNodeTransaction, EditTransactionBase, mEditorBase, mNode, mParent, mRefNode) NS_IMPL_ADDREF_INHERITED(DeleteNodeTransaction, EditTransactionBase) NS_IMPL_RELEASE_INHERITED(DeleteNodeTransaction, EditTransactionBase) NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteNodeTransaction) NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase) nsresult DeleteNodeTransaction::Init(EditorBase* aEditorBase, nsINode* aNode, RangeUpdater* aRangeUpdater) { NS_ENSURE_TRUE(aEditorBase && aNode, NS_ERROR_NULL_POINTER); mEditorBase = aEditorBase; mNode = aNode; mParent = aNode->GetParentNode(); // do nothing if the node has a parent and it's read-only NS_ENSURE_TRUE(!mParent || mEditorBase->IsModifiableNode(mParent), NS_ERROR_FAILURE); mRangeUpdater = aRangeUpdater; return NS_OK; } NS_IMETHODIMP DeleteNodeTransaction::DoTransaction() { NS_ENSURE_TRUE(mNode, NS_ERROR_NOT_INITIALIZED); if (!mParent) { // this is a no-op, there's no parent to delete mNode from return NS_OK; } // remember which child mNode was (by remembering which child was next); // mRefNode can be null mRefNode = mNode->GetNextSibling(); // give range updater a chance. SelAdjDeleteNode() needs to be called // *before* we do the action, unlike some of the other RangeItem update // methods. if (mRangeUpdater) { mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode()); } ErrorResult error; mParent->RemoveChild(*mNode, error); return error.StealNSResult(); } NS_IMETHODIMP DeleteNodeTransaction::UndoTransaction() { if (!mParent) { // this is a legal state, the txn is a no-op return NS_OK; } if (!mNode) { return NS_ERROR_NULL_POINTER; } ErrorResult error; nsCOMPtr<nsIContent> refNode = mRefNode; mParent->InsertBefore(*mNode, refNode, error); return error.StealNSResult(); } NS_IMETHODIMP DeleteNodeTransaction::RedoTransaction() { if (!mParent) { // this is a legal state, the txn is a no-op return NS_OK; } if (!mNode) { return NS_ERROR_NULL_POINTER; } if (mRangeUpdater) { mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode()); } ErrorResult error; mParent->RemoveChild(*mNode, error); return error.StealNSResult(); } NS_IMETHODIMP DeleteNodeTransaction::GetTxnDescription(nsAString& aString) { aString.AssignLiteral("DeleteNodeTransaction"); return NS_OK; } } // namespace mozilla