зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
2.1 KiB
C++
75 строки
2.1 KiB
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/. */
|
|
|
|
#ifndef DeleteNodeTransaction_h
|
|
#define DeleteNodeTransaction_h
|
|
|
|
#include "mozilla/EditTransactionBase.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "nsIContent.h"
|
|
#include "nsINode.h"
|
|
#include "nsISupportsImpl.h"
|
|
#include "nscore.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class EditorBase;
|
|
|
|
/**
|
|
* A transaction that deletes a single element
|
|
*/
|
|
class DeleteNodeTransaction final : public EditTransactionBase {
|
|
protected:
|
|
DeleteNodeTransaction(EditorBase& aEditorBase, nsIContent& aContentToDelete);
|
|
|
|
public:
|
|
/**
|
|
* Creates a delete node transaction instance. This returns nullptr if
|
|
* it cannot remove the node from its parent.
|
|
*
|
|
* @param aEditorBase The editor.
|
|
* @param aContentToDelete The node to be removed from the DOM tree.
|
|
*/
|
|
static already_AddRefed<DeleteNodeTransaction> MaybeCreate(
|
|
EditorBase& aEditorBase, nsIContent& aContentToDelete);
|
|
|
|
/**
|
|
* CanDoIt() returns true if there are enough members and can modify the
|
|
* parent. Otherwise, false.
|
|
*/
|
|
bool CanDoIt() const;
|
|
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteNodeTransaction,
|
|
EditTransactionBase)
|
|
|
|
NS_DECL_EDITTRANSACTIONBASE
|
|
NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(DeleteNodeTransaction)
|
|
|
|
MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
|
|
|
|
nsIContent* GetContent() const { return mContentToDelete; }
|
|
|
|
protected:
|
|
virtual ~DeleteNodeTransaction() = default;
|
|
|
|
// The editor for this transaction.
|
|
RefPtr<EditorBase> mEditorBase;
|
|
|
|
// The element to delete.
|
|
nsCOMPtr<nsIContent> mContentToDelete;
|
|
|
|
// Parent of node to delete.
|
|
nsCOMPtr<nsINode> mParentNode;
|
|
|
|
// Next sibling to remember for undo/redo purposes.
|
|
nsCOMPtr<nsIContent> mRefContent;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // #ifndef DeleteNodeTransaction_h
|