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/* -*- 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
#ifndef MoveNodeTransaction_h
#define MoveNodeTransaction_h
#include "EditTransactionBase.h" // for EditTransactionBase, etc.
#include "EditorForwards.h"
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsIContent.h" // for nsIContent
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
namespace mozilla {
/**
* A transaction that moves a content node to a specified point.
*/
class MoveNodeTransaction final : public EditTransactionBase {
protected:
template <typename PT, typename CT>
MoveNodeTransaction(HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
const EditorDOMPointBase<PT, CT>& aPointToInsert);
public:
/**
* Create a transaction for moving aContentToMove before the child at
* aPointToInsert.
*
* @param aHTMLEditor The editor which manages the transaction.
* @param aContentToMove The node to be moved.
* @param aPointToInsert The insertion point of aContentToMove.
* @return A MoveNodeTransaction which was initialized
* with the arguments.
*/
template <typename PT, typename CT>
static already_AddRefed<MoveNodeTransaction> MaybeCreate(
HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
const EditorDOMPointBase<PT, CT>& aPointToInsert);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MoveNodeTransaction,
EditTransactionBase)
NS_DECL_EDITTRANSACTIONBASE
NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(MoveNodeTransaction)
MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
/**
* SuggestPointToPutCaret() suggests a point after doing or redoing the
* transaction.
*/
template <typename EditorDOMPointType>
EditorDOMPointType SuggestPointToPutCaret() const {
if (MOZ_UNLIKELY(!mContainer || !mContentToMove)) {
return EditorDOMPointType();
}
return EditorDOMPointType::After(mContentToMove);
}
/**
* Suggest next insertion point if the caller wants to move another content
* node around the insertion point.
*/
template <typename EditorDOMPointType>
EditorDOMPointType SuggestNextInsertionPoint() const {
if (MOZ_UNLIKELY(!mContainer)) {
return EditorDOMPointType();
}
if (!mReference) {
return EditorDOMPointType::AtEndOf(mContainer);
}
if (MOZ_UNLIKELY(mReference->GetParentNode() != mContainer)) {
if (MOZ_LIKELY(mContentToMove->GetParentNode() == mContainer)) {
return EditorDOMPointType(mContentToMove).NextPoint();
}
return EditorDOMPointType::AtEndOf(mContainer);
}
return EditorDOMPointType(mReference);
}
friend std::ostream& operator<<(std::ostream& aStream,
const MoveNodeTransaction& aTransaction);
protected:
virtual ~MoveNodeTransaction() = default;
MOZ_CAN_RUN_SCRIPT nsresult DoTransactionInternal();
// The content which will be or was moved from mOldContainer to mContainer.
nsCOMPtr<nsIContent> mContentToMove;
// mContainer is new container of mContentToInsert after (re-)doing the
// transaction.
nsCOMPtr<nsINode> mContainer;
// mReference is the child content where mContentToMove should be or was
// inserted into the mContainer. This is typically the next sibling of
// mContentToMove after moving.
nsCOMPtr<nsIContent> mReference;
// mOldContainer is the original container of mContentToMove before moving.
nsCOMPtr<nsINode> mOldContainer;
// mOldNextSibling is the next sibling of mCOntentToMove before moving.
nsCOMPtr<nsIContent> mOldNextSibling;
// The editor for this transaction.
RefPtr<HTMLEditor> mHTMLEditor;
};
} // namespace mozilla
#endif // #ifndef MoveNodeTransaction_h