зеркало из https://github.com/mozilla/gecko-dev.git
198 строки
5.9 KiB
C++
198 строки
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "EditAggregateTxn.h"
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#include "nsCOMPtr.h"
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EditAggregateTxn::EditAggregateTxn()
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: EditTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(EditAggregateTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(EditAggregateTxn, EditTxn)
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tmp->mChildren.Clear();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(EditAggregateTxn, EditTxn)
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for (PRUint32 i = 0; i < tmp->mChildren.Length(); ++i) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mChildren[i]");
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cb.NoteXPCOMChild(static_cast<nsITransaction*>(tmp->mChildren[i]));
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ADDREF_INHERITED(EditAggregateTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(EditAggregateTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EditAggregateTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP EditAggregateTxn::DoTransaction(void)
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{
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nsresult result=NS_OK; // it's legal (but not very useful) to have an empty child list
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for (PRUint32 i = 0, length = mChildren.Length(); i < length; ++i)
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{
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nsITransaction *txn = mChildren[i];
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->DoTransaction();
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if (NS_FAILED(result))
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break;
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}
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return result;
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}
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NS_IMETHODIMP EditAggregateTxn::UndoTransaction(void)
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{
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nsresult result=NS_OK; // it's legal (but not very useful) to have an empty child list
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// undo goes through children backwards
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for (PRUint32 i = mChildren.Length(); i-- != 0; )
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{
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nsITransaction *txn = mChildren[i];
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->UndoTransaction();
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if (NS_FAILED(result))
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break;
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}
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return result;
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}
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NS_IMETHODIMP EditAggregateTxn::RedoTransaction(void)
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{
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nsresult result=NS_OK; // it's legal (but not very useful) to have an empty child list
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for (PRUint32 i = 0, length = mChildren.Length(); i < length; ++i)
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{
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nsITransaction *txn = mChildren[i];
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->RedoTransaction();
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if (NS_FAILED(result))
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break;
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}
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return result;
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}
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NS_IMETHODIMP EditAggregateTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
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{
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nsresult result=NS_OK; // it's legal (but not very useful) to have an empty child list
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if (aDidMerge)
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*aDidMerge = PR_FALSE;
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// FIXME: Is this really intended not to loop? It looks like the code
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// that used to be here sort of intended to loop, but didn't.
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if (mChildren.Length() > 0)
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{
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nsITransaction *txn = mChildren[0];
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->Merge(aTransaction, aDidMerge);
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}
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return result;
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}
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NS_IMETHODIMP EditAggregateTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("EditAggregateTxn: ");
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if (mName)
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{
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nsAutoString name;
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mName->ToString(name);
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aString += name;
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}
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::AppendChild(EditTxn *aTxn)
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{
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if (!aTxn) {
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return NS_ERROR_NULL_POINTER;
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}
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nsRefPtr<EditTxn> *slot = mChildren.AppendElement();
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if (!slot) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*slot = aTxn;
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::GetCount(PRUint32 *aCount)
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{
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if (!aCount) {
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return NS_ERROR_NULL_POINTER;
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}
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*aCount = mChildren.Length();
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::GetTxnAt(PRInt32 aIndex, EditTxn **aTxn)
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{
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// preconditions
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NS_PRECONDITION(aTxn, "null out param");
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if (!aTxn) {
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return NS_ERROR_NULL_POINTER;
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}
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*aTxn = nsnull; // initialize out param as soon as we know it's a valid pointer
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// get the transaction at aIndex
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PRUint32 txnCount = mChildren.Length();
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if (0>aIndex || ((PRInt32)txnCount)<=aIndex) {
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return NS_ERROR_UNEXPECTED;
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}
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// ugh, this is all wrong - what a mess we have with editor transaction interfaces
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*aTxn = mChildren[aIndex];
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NS_ENSURE_TRUE(*aTxn, NS_ERROR_UNEXPECTED);
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NS_ADDREF(*aTxn);
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::SetName(nsIAtom *aName)
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{
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mName = do_QueryInterface(aName);
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::GetName(nsIAtom **aName)
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{
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if (aName && mName)
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{
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*aName = mName;
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NS_ADDREF(*aName);
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return NS_OK;
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}
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return NS_ERROR_NULL_POINTER;
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}
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