зеркало из https://github.com/mozilla/gecko-dev.git
263 строки
6.9 KiB
C++
263 строки
6.9 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: NPL 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 Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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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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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 NPL, 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 NPL, 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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#include "nsIDOMNode.h"
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#include "nsVoidArray.h"
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EditAggregateTxn::EditAggregateTxn()
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: EditTxn()
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{
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nsresult res = NS_NewISupportsArray(getter_AddRefs(mChildren));
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NS_POSTCONDITION(NS_SUCCEEDED(res), "EditAggregateTxn failed in constructor");
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}
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EditAggregateTxn::~EditAggregateTxn()
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{
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// nsISupportsArray cleans up array for us at destruct time
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}
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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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if (mChildren)
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{
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PRInt32 i;
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PRUint32 count;
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mChildren->Count(&count);
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for (i=0; i<((PRInt32)count); i++)
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{
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nsCOMPtr<nsITransaction> txn (do_QueryElementAt(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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}
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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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if (mChildren)
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{
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PRInt32 i;
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PRUint32 count;
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mChildren->Count(&count);
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// undo goes through children backwards
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for (i=count-1; i>=0; i--)
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{
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nsCOMPtr<nsITransaction> txn (do_QueryElementAt(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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}
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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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if (mChildren)
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{
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PRInt32 i;
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PRUint32 count;
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mChildren->Count(&count);
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for (i=0; i<((PRInt32)count); i++)
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{
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nsCOMPtr<nsITransaction> txn (do_QueryElementAt(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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}
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return result;
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}
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NS_IMETHODIMP EditAggregateTxn::GetIsTransient(PRBool *aIsTransient)
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{
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if (nsnull!=aIsTransient)
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*aIsTransient = PR_FALSE;
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return NS_OK;
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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 (nsnull!=aDidMerge)
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*aDidMerge=PR_FALSE;
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if (mChildren)
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{
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PRInt32 i=0;
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PRUint32 count;
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mChildren->Count(&count);
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NS_ASSERTION(count>0, "bad count");
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if (0<count)
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{
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nsCOMPtr<nsITransaction> txn (do_QueryElementAt(mChildren, i));
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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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}
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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.Assign(NS_LITERAL_STRING("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 (mChildren && aTxn)
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{
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// aaahhhh! broken interfaces drive me crazy!!!
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nsCOMPtr<nsISupports> isupports;
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aTxn->QueryInterface(NS_GET_IID(nsISupports), getter_AddRefs(isupports));
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mChildren->AppendElement(isupports);
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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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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=0;
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if (mChildren) {
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mChildren->Count(aCount);
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}
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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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NS_PRECONDITION(mChildren, "bad internal state");
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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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if (!mChildren) {
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return NS_ERROR_UNEXPECTED;
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}
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// get the transaction at aIndex
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PRUint32 txnCount;
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mChildren->Count(&txnCount);
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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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mChildren->QueryElementAt(aIndex, EditTxn::GetCID(), (void**)aTxn);
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if (!*aTxn)
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return NS_ERROR_UNEXPECTED;
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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)
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{
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if (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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}
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return NS_ERROR_NULL_POINTER;
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}
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NS_IMETHODIMP_(nsrefcnt) EditAggregateTxn::AddRef(void)
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{
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return EditTxn::AddRef();
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}
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//NS_IMPL_RELEASE_INHERITED(Class, Super)
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NS_IMETHODIMP_(nsrefcnt) EditAggregateTxn::Release(void)
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{
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return EditTxn::Release();
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}
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//NS_IMPL_QUERY_INTERFACE_INHERITED1(Class, Super, AdditionalInterface)
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NS_IMETHODIMP EditAggregateTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (!aInstancePtr) return NS_ERROR_NULL_POINTER;
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if (aIID.Equals(EditAggregateTxn::GetCID())) {
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*aInstancePtr = NS_STATIC_CAST(EditAggregateTxn*, this);
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// *aInstancePtr = (nsISupports*)(EditAggregateTxn*)(this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return EditTxn::QueryInterface(aIID, aInstancePtr);
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}
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