gecko-dev/editor/base/DeleteTableCellTxn.cpp

180 lines
5.0 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 "DeleteTableCellTxn.h"
#include "nsEditor.h"
#include "nsIDOMCharacterData.h"
#include "nsIDOMSelection.h"
#include "nsIPresShell.h"
#include "EditAggregateTxn.h"
static NS_DEFINE_IID(kDeleteTableCellTxnIID, DELETE_CELL_TXN_IID);
static NS_DEFINE_IID(kIDOMSelectionIID, NS_IDOMSELECTION_IID);
nsIAtom *DeleteTableCellTxn::gDeleteTableCellTxnName;
nsresult DeleteTableCellTxn::ClassInit()
{
if (nsnull==gDeleteTableCellTxnName)
gDeleteTableCellTxnName = NS_NewAtom("NS_DeleteTableCellTxn");
return NS_OK;
}
DeleteTableCellTxn::DeleteTableCellTxn()
: EditTxn()
{
}
DeleteTableCellTxn::~DeleteTableCellTxn()
{
}
NS_IMETHODIMP DeleteTableCellTxn::Init(nsIDOMCharacterData *aElement,
nsIDOMNode *aNode,
nsIPresShell* aPresShell)
{
mElement = do_QueryInterface(aElement);
mNodeToInsert = aNode;
mPresShell = aPresShell;
return NS_OK;
}
NS_IMETHODIMP DeleteTableCellTxn::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(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(res)) {
res = selection->Collapse(mElement, 0 /*mOffset+1*/ /*+mStringToInsert.Length()*/);
}
return res;
}
NS_IMETHODIMP DeleteTableCellTxn::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(SELECTION_NORMAL, getter_AddRefs(selection));
if (NS_SUCCEEDED(result)) {
result = selection->Collapse(mElement, mOffset);
}
}
#endif
return result;
}
#if 0
NS_IMETHODIMP DeleteTableCellTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
// set out param default value
if (nsnull!=aDidMerge)
*aDidMerge=PR_FALSE;
if ((nsnull!=aDidMerge) && (nsnull!=aTransaction))
{
// if aTransaction isa DeleteTableCellTxn, and if the selection hasn't changed,
// then absorb it
nsCOMPtr<DeleteTableCellTxn> otherTxn(aTransaction);
if (otherTxn)
{
if (PR_TRUE==IsSequentialInsert(otherTxn))
{
nsAutoString otherData;
otherTxn->GetData(otherData);
mStringToInsert += otherData;
*aDidMerge = PR_TRUE;
}
}
else
{ // the next DeleteTableCellTxn might be inside an aggregate that we have special knowledge of
nsCOMPtr<EditAggregateTxn> otherTxn(aTransaction);
if (otherTxn)
{
nsCOMPtr<nsIAtom> txnName;
otherTxn->GetName(getter_AddRefs(txnName));
if (txnName==gDeleteTableCellTxnName)
{ // yep, it's one of ours. By definition, it must contain only
// a single DeleteTableCellTxn
nsCOMPtr<EditTxn> childTxn;
otherTxn->GetTxnAt(0, getter_AddRefs(childTxn));
nsCOMPtr<DeleteTableCellTxn> otherInsertTxn(childTxn);
if (otherInsertTxn)
{
if (PR_TRUE==IsSequentialInsert(otherInsertTxn))
{
nsAutoString otherData;
otherInsertTxn->GetData(otherData);
mStringToInsert += otherData;
*aDidMerge = PR_TRUE;
}
}
}
}
}
}
return NS_OK;
}
#endif
NS_IMETHODIMP DeleteTableCellTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP DeleteTableCellTxn::GetUndoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Remove Table";
}
return NS_OK;
}
NS_IMETHODIMP DeleteTableCellTxn::GetRedoString(nsString *aString)
{
if (nsnull!=aString)
{
*aString="Insert Table";
}
return NS_OK;
}
/* ============= nsISupports implementation ====================== */
NS_IMETHODIMP
DeleteTableCellTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kDeleteTableCellTxnIID)) {
*aInstancePtr = (void*)(DeleteTableCellTxn*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return (EditTxn::QueryInterface(aIID, aInstancePtr));
}