gecko-dev/editor/libeditor/base/InsertTextTxn.h

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2.4 KiB
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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef InsertTextTxn_h__
#define InsertTextTxn_h__
#include "EditTxn.h" // for EditTxn, NS_DECL_EDITTXN
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsID.h" // for nsIID
#include "nsIDOMCharacterData.h" // for nsIDOMCharacterData
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
#include "nsString.h" // for nsString
#include "nscore.h" // for NS_IMETHOD, nsAString
class nsIEditor;
class nsITransaction;
#define INSERT_TEXT_TXN_CID \
{/* 93276f00-ab2c-11d2-8f4b-006008159b0c*/ \
0x93276f00, 0xab2c, 0x11d2, \
{0x8f, 0xb4, 0x0, 0x60, 0x8, 0x15, 0x9b, 0xc} }
/**
* A transaction that inserts text into a content node.
*/
class InsertTextTxn : public EditTxn
{
public:
static const nsIID& GetCID() { static const nsIID iid = INSERT_TEXT_TXN_CID; return iid; }
/** initialize the transaction
* @param aElement the text content node
* @param aOffset the location in aElement to do the insertion
* @param aString the new text to insert
* @param aPresShell used to get and set the selection
*/
NS_IMETHOD Init(nsIDOMCharacterData *aElement,
uint32_t aOffset,
const nsAString& aString,
nsIEditor *aEditor);
InsertTextTxn();
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(InsertTextTxn, EditTxn)
NS_DECL_EDITTXN
NS_IMETHOD Merge(nsITransaction *aTransaction, bool *aDidMerge);
/** return the string data associated with this transaction */
NS_IMETHOD GetData(nsString& aResult);
protected:
/** return true if aOtherTxn immediately follows this txn */
virtual bool IsSequentialInsert(InsertTextTxn *aOtherTxn);
/** the text element to operate upon */
nsCOMPtr<nsIDOMCharacterData> mElement;
/** the offset into mElement where the insertion is to take place */
uint32_t mOffset;
/** the text to insert into mElement at mOffset */
nsString mStringToInsert;
/** the editor, which we'll need to get the selection */
nsIEditor *mEditor;
};
#endif