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120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MoveNodeTransaction_h
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#define MoveNodeTransaction_h
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#include "EditTransactionBase.h" // for EditTransactionBase, etc.
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#include "EditorForwards.h"
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#include "nsCOMPtr.h" // for nsCOMPtr
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#include "nsCycleCollectionParticipant.h"
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#include "nsIContent.h" // for nsIContent
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#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
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namespace mozilla {
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/**
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* A transaction that moves a content node to a specified point.
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*/
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class MoveNodeTransaction final : public EditTransactionBase {
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protected:
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template <typename PT, typename CT>
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MoveNodeTransaction(HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
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const EditorDOMPointBase<PT, CT>& aPointToInsert);
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public:
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/**
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* Create a transaction for moving aContentToMove before the child at
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* aPointToInsert.
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*
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* @param aHTMLEditor The editor which manages the transaction.
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* @param aContentToMove The node to be moved.
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* @param aPointToInsert The insertion point of aContentToMove.
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* @return A MoveNodeTransaction which was initialized
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* with the arguments.
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*/
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template <typename PT, typename CT>
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static already_AddRefed<MoveNodeTransaction> MaybeCreate(
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HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
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const EditorDOMPointBase<PT, CT>& aPointToInsert);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MoveNodeTransaction,
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EditTransactionBase)
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NS_DECL_EDITTRANSACTIONBASE
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NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(MoveNodeTransaction)
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MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
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/**
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* SuggestPointToPutCaret() suggests a point after doing or redoing the
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* transaction.
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*/
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template <typename EditorDOMPointType>
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EditorDOMPointType SuggestPointToPutCaret() const {
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if (MOZ_UNLIKELY(!mContainer || !mContentToMove)) {
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return EditorDOMPointType();
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}
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return EditorDOMPointType::After(mContentToMove);
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}
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/**
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* Suggest next insertion point if the caller wants to move another content
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* node around the insertion point.
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*/
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template <typename EditorDOMPointType>
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EditorDOMPointType SuggestNextInsertionPoint() const {
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if (MOZ_UNLIKELY(!mContainer)) {
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return EditorDOMPointType();
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}
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if (!mReference) {
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return EditorDOMPointType::AtEndOf(mContainer);
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}
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if (MOZ_UNLIKELY(mReference->GetParentNode() != mContainer)) {
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if (MOZ_LIKELY(mContentToMove->GetParentNode() == mContainer)) {
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return EditorDOMPointType(mContentToMove).NextPoint();
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}
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return EditorDOMPointType::AtEndOf(mContainer);
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}
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return EditorDOMPointType(mReference);
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}
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friend std::ostream& operator<<(std::ostream& aStream,
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const MoveNodeTransaction& aTransaction);
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protected:
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virtual ~MoveNodeTransaction() = default;
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MOZ_CAN_RUN_SCRIPT nsresult DoTransactionInternal();
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// The content which will be or was moved from mOldContainer to mContainer.
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nsCOMPtr<nsIContent> mContentToMove;
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// mContainer is new container of mContentToInsert after (re-)doing the
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// transaction.
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nsCOMPtr<nsINode> mContainer;
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// mReference is the child content where mContentToMove should be or was
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// inserted into the mContainer. This is typically the next sibling of
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// mContentToMove after moving.
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nsCOMPtr<nsIContent> mReference;
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// mOldContainer is the original container of mContentToMove before moving.
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nsCOMPtr<nsINode> mOldContainer;
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// mOldNextSibling is the next sibling of mCOntentToMove before moving.
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nsCOMPtr<nsIContent> mOldNextSibling;
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// The editor for this transaction.
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RefPtr<HTMLEditor> mHTMLEditor;
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};
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} // namespace mozilla
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#endif // #ifndef MoveNodeTransaction_h
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