зеркало из https://github.com/mozilla/gecko-dev.git
260 строки
6.6 KiB
C++
260 строки
6.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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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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// base class does this: NS_INIT_REFCNT();
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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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SetTransactionDescriptionID( kTransactionID );
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/* log description initialized in parent 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::Do(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<nsISupports> isupports = (dont_AddRef)(mChildren->ElementAt(i));
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nsCOMPtr<nsITransaction> txn ( do_QueryInterface(isupports) );
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->Do();
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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::Undo(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<nsISupports> isupports = (dont_AddRef)(mChildren->ElementAt(i));
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nsCOMPtr<nsITransaction> txn ( do_QueryInterface(isupports) );
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->Undo();
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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::Redo(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<nsISupports> isupports = (dont_AddRef)(mChildren->ElementAt(i));
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nsCOMPtr<nsITransaction> txn ( do_QueryInterface(isupports) );
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->Redo();
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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(PRBool *aDidMerge, nsITransaction *aTransaction)
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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<nsISupports> isupports = (dont_AddRef)(mChildren->ElementAt(i));
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nsCOMPtr<nsITransaction> txn ( do_QueryInterface(isupports) );
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if (!txn) { return NS_ERROR_NULL_POINTER; }
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result = txn->Merge(aDidMerge, aTransaction);
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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::Write(nsIOutputStream *aOutputStream)
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{
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::GetUndoString(nsString *aString)
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{
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if (nsnull!=aString)
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aString->SetLength(0);
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return NS_OK;
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}
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NS_IMETHODIMP EditAggregateTxn::GetRedoString(nsString *aString)
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{
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if (nsnull!=aString)
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aString->SetLength(0);
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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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nsCOMPtr<nsISupports> isupports = (dont_AddRef)(mChildren->ElementAt(aIndex));
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// ugh, this is all wrong - what a mess we have with editor transaction interfaces
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isupports->QueryInterface(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_INHERITED(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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