gecko-dev/editor/base/DeleteTableTxn.cpp

128 строки
3.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "DeleteTableTxn.h"
#include "nsEditor.h"
#include "nsIDOMCharacterData.h"
#include "nsIDOMSelection.h"
#include "nsIPresShell.h"
#include "EditAggregateTxn.h"
static NS_DEFINE_IID(kDeleteTableTxnIID, DELETE_TABLE_TXN_IID);
static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID);
nsIAtom *DeleteTableTxn::gDeleteTableTxnName;
nsresult DeleteTableTxn::ClassInit()
{
if (nsnull==gDeleteTableTxnName)
gDeleteTableTxnName = NS_NewAtom("NS_DeleteTableTxn");
return NS_OK;
}
DeleteTableTxn::DeleteTableTxn()
: EditTxn()
{
}
DeleteTableTxn::~DeleteTableTxn()
{
}
NS_IMETHODIMP DeleteTableTxn::Init(nsIDOMCharacterData *aElement,
nsIDOMNode *aNode,
nsIPresShell* aPresShell)
{
mElement = do_QueryInterface(aElement);
mNodeToInsert = aNode;
mPresShell = aPresShell;
return NS_OK;
}
NS_IMETHODIMP DeleteTableTxn::Do(void)
{
//nsresult res = mElement->InsertData(mOffset, mStringToInsert);
// advance caret: This requires the presentation shell to get the selection.
nsresult res = NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMSelection> selection;
res = mPresShell->GetSelection(getter_AddRefs(selection));
if (NS_SUCCEEDED(res)) {
res = selection->Collapse(mElement, 0 /*mOffset+1*/ /*+mStringToInsert.Length()*/);
}
return res;
}
NS_IMETHODIMP DeleteTableTxn::Undo(void)
{
nsresult result = NS_ERROR_FAILURE;
#if 0
PRUint32 length = mStringToInsert.Length();
result = mElement->DeleteData(mOffset, length);
if (NS_SUCCEEDED(result))
{ // set the selection to the insertion point where the string was removed
nsCOMPtr<nsIDOMSelection> selection;
result = mPresShell->GetSelection(getter_AddRefs(selection));
if (NS_SUCCEEDED(result)) {
result = selection->Collapse(mElement, mOffset);
}
}
#endif
return result;
}
NS_IMETHODIMP DeleteTableTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP DeleteTableTxn::GetUndoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Remove Table";
}
return NS_OK;
}
NS_IMETHODIMP DeleteTableTxn::GetRedoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Insert Table";
}
return NS_OK;
}
/* ============= nsISupports implementation ====================== */
NS_IMETHODIMP
DeleteTableTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kDeleteTableTxnIID)) {
*aInstancePtr = (void*)(DeleteTableTxn*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return (EditTxn::QueryInterface(aIID, aInstancePtr));
}