9445b8c79b
all I did was initialize an out-param. no reviewer. git-svn-id: svn://10.0.0.236/trunk@59994 18797224-902f-48f8-a5cc-f745e15eee43
144 lines
3.7 KiB
C++
144 lines
3.7 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 Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 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 "GenericElementCollection.h"
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#include "nsIDOMElement.h"
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#include "nsGenericHTMLElement.h"
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GenericElementCollection::GenericElementCollection(nsIContent *aParent,
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nsIAtom *aTag)
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: nsGenericDOMHTMLCollection()
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{
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mParent = aParent;
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mTag = aTag;
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NS_IF_ADDREF(aTag);
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}
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GenericElementCollection::~GenericElementCollection()
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{
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// we do NOT have a ref-counted reference to mParent, so do NOT
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// release it! this is to avoid circular references. The
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// instantiator who provided mParent is responsible for managing our
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// reference for us.
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// Release reference on the tag
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NS_IF_RELEASE(mTag);
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}
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// we re-count every call. A better implementation would be to set ourselves up as
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// an observer of contentAppended, contentInserted, and contentDeleted
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NS_IMETHODIMP
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GenericElementCollection::GetLength(PRUint32* aLength)
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{
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if (nsnull==aLength)
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return NS_ERROR_NULL_POINTER;
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*aLength=0;
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nsresult result = NS_OK;
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if (nsnull!=mParent)
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{
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nsIContent *child=nsnull;
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PRUint32 childIndex=0;
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mParent->ChildAt(childIndex, child);
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while (nsnull!=child)
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{
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nsIAtom *childTag;
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child->GetTag(childTag);
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if (mTag==childTag)
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{
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(*aLength)++;
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}
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NS_RELEASE(childTag);
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NS_RELEASE(child);
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childIndex++;
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mParent->ChildAt(childIndex, child);
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}
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}
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return result;
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}
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NS_IMETHODIMP
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GenericElementCollection::Item(PRUint32 aIndex, nsIDOMNode** aReturn)
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{
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*aReturn=nsnull;
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PRUint32 theIndex = 0;
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nsresult rv = NS_OK;
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if (nsnull!=mParent)
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{
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nsIContent *child=nsnull;
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PRUint32 childIndex=0;
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mParent->ChildAt(childIndex, child);
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while (nsnull!=child)
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{
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nsIAtom *childTag;
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child->GetTag(childTag);
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if (mTag==childTag)
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{
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if (aIndex==theIndex)
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{
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child->QueryInterface(kIDOMNodeIID, (void**)aReturn); // out-param addref
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NS_ASSERTION(nsnull!=aReturn, "content element must be an nsIDOMNode");
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NS_RELEASE(childTag);
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NS_RELEASE(child);
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break;
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}
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theIndex++;
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}
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NS_RELEASE(childTag);
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NS_RELEASE(child);
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childIndex++;
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mParent->ChildAt(childIndex, child);
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}
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}
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return rv;
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}
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NS_IMETHODIMP
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GenericElementCollection::NamedItem(const nsString& aName, nsIDOMNode** aReturn)
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{
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NS_ENSURE_ARG_POINTER(aReturn);
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*aReturn = nsnull;
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nsresult rv = NS_OK;
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if (nsnull!=mParent)
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{
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}
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return rv;
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}
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NS_IMETHODIMP
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GenericElementCollection::ParentDestroyed()
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{
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// see comment in destructor, do NOT release mParent!
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mParent = nsnull;
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return NS_OK;
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}
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#ifdef DEBUG
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nsresult
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GenericElementCollection::SizeOf(nsISizeOfHandler* aSizer,
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PRUint32* aResult) const
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{
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if (!aResult) return NS_ERROR_NULL_POINTER;
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*aResult = sizeof(*this);
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return NS_OK;
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}
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#endif
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